Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1 | /* Part of CPP library. (Macro and #define handling.) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998, |
Tom Tromey | ee38036 | 2007-01-30 15:46:01 +0000 | [diff] [blame] | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
Joseph Myers | 148e421 | 2009-03-29 23:56:07 +0100 | [diff] [blame] | 4 | 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 5 | Written by Per Bothner, 1994. |
| 6 | Based on CCCP program by Paul Rubin, June 1986 |
| 7 | Adapted to ANSI C, Richard Stallman, Jan 1987 |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify it |
| 10 | under the terms of the GNU General Public License as published by the |
Jakub Jelinek | 748086b | 2009-04-09 17:00:19 +0200 | [diff] [blame] | 11 | Free Software Foundation; either version 3, or (at your option) any |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 12 | later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
Jakub Jelinek | 748086b | 2009-04-09 17:00:19 +0200 | [diff] [blame] | 20 | along with this program; see the file COPYING3. If not see |
| 21 | <http://www.gnu.org/licenses/>. |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 22 | |
| 23 | In other words, you are welcome to use, share and improve this program. |
| 24 | You are forbidden to forbid anyone else to use, share and improve |
| 25 | what you give them. Help stamp out software-hoarding! */ |
| 26 | |
| 27 | #include "config.h" |
| 28 | #include "system.h" |
| 29 | #include "cpplib.h" |
Paolo Bonzini | 4f4e53dd | 2004-05-24 10:50:45 +0000 | [diff] [blame] | 30 | #include "internal.h" |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 31 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 32 | typedef struct macro_arg macro_arg; |
| 33 | struct macro_arg |
| 34 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 35 | const cpp_token **first; /* First token in unexpanded argument. */ |
Kazu Hirata | 6d2f888 | 2001-10-10 11:33:39 +0000 | [diff] [blame] | 36 | const cpp_token **expanded; /* Macro-expanded argument. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 37 | const cpp_token *stringified; /* Stringified argument. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 38 | unsigned int count; /* # of tokens in argument. */ |
| 39 | unsigned int expanded_count; /* # of tokens in expanded argument. */ |
| 40 | }; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 41 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 42 | /* Macro expansion. */ |
| 43 | |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 44 | static int enter_macro_context (cpp_reader *, cpp_hashnode *, |
| 45 | const cpp_token *); |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 46 | static int builtin_macro (cpp_reader *, cpp_hashnode *); |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 47 | static void push_ptoken_context (cpp_reader *, cpp_hashnode *, _cpp_buff *, |
| 48 | const cpp_token **, unsigned int); |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 49 | static _cpp_buff *collect_args (cpp_reader *, const cpp_hashnode *, |
| 50 | _cpp_buff **); |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 51 | static cpp_context *next_context (cpp_reader *); |
| 52 | static const cpp_token *padding_token (cpp_reader *, const cpp_token *); |
| 53 | static void expand_arg (cpp_reader *, macro_arg *); |
| 54 | static const cpp_token *new_string_token (cpp_reader *, uchar *, unsigned int); |
| 55 | static const cpp_token *stringify_arg (cpp_reader *, macro_arg *); |
| 56 | static void paste_all_tokens (cpp_reader *, const cpp_token *); |
| 57 | static bool paste_tokens (cpp_reader *, const cpp_token **, const cpp_token *); |
| 58 | static void replace_args (cpp_reader *, cpp_hashnode *, cpp_macro *, |
| 59 | macro_arg *); |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 60 | static _cpp_buff *funlike_invocation_p (cpp_reader *, cpp_hashnode *, |
| 61 | _cpp_buff **); |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 62 | static bool create_iso_definition (cpp_reader *, cpp_macro *); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 63 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 64 | /* #define directive parsing and handling. */ |
| 65 | |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 66 | static cpp_token *alloc_expansion_token (cpp_reader *, cpp_macro *); |
| 67 | static cpp_token *lex_expansion_token (cpp_reader *, cpp_macro *); |
| 68 | static bool warn_of_redefinition (cpp_reader *, const cpp_hashnode *, |
| 69 | const cpp_macro *); |
| 70 | static bool parse_params (cpp_reader *, cpp_macro *); |
| 71 | static void check_trad_stringification (cpp_reader *, const cpp_macro *, |
| 72 | const cpp_string *); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 73 | |
Neil Booth | a69cbaa | 2002-07-23 22:57:49 +0000 | [diff] [blame] | 74 | /* Emits a warning if NODE is a macro defined in the main file that |
| 75 | has not been used. */ |
| 76 | int |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 77 | _cpp_warn_if_unused_macro (cpp_reader *pfile, cpp_hashnode *node, |
| 78 | void *v ATTRIBUTE_UNUSED) |
Neil Booth | a69cbaa | 2002-07-23 22:57:49 +0000 | [diff] [blame] | 79 | { |
| 80 | if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
| 81 | { |
| 82 | cpp_macro *macro = node->value.macro; |
| 83 | |
| 84 | if (!macro->used |
Per Bothner | 50f59cd | 2004-01-19 21:30:18 -0800 | [diff] [blame] | 85 | && MAIN_FILE_P (linemap_lookup (pfile->line_table, macro->line))) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 86 | cpp_error_with_line (pfile, CPP_DL_WARNING, macro->line, 0, |
Neil Booth | a69cbaa | 2002-07-23 22:57:49 +0000 | [diff] [blame] | 87 | "macro \"%s\" is not used", NODE_NAME (node)); |
| 88 | } |
| 89 | |
| 90 | return 1; |
| 91 | } |
| 92 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 93 | /* Allocates and returns a CPP_STRING token, containing TEXT of length |
| 94 | LEN, after null-terminating it. TEXT must be in permanent storage. */ |
| 95 | static const cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 96 | new_string_token (cpp_reader *pfile, unsigned char *text, unsigned int len) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 97 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 98 | cpp_token *token = _cpp_temp_token (pfile); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 99 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 100 | text[len] = '\0'; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 101 | token->type = CPP_STRING; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 102 | token->val.str.len = len; |
| 103 | token->val.str.text = text; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 104 | token->flags = 0; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 105 | return token; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 106 | } |
| 107 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 108 | static const char * const monthnames[] = |
| 109 | { |
| 110 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 111 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| 112 | }; |
| 113 | |
Zack Weinberg | 21b1149 | 2004-09-09 19:16:56 +0000 | [diff] [blame] | 114 | /* Helper function for builtin_macro. Returns the text generated by |
| 115 | a builtin macro. */ |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 116 | const uchar * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 117 | _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 118 | { |
Per Bothner | 12f9df4 | 2004-02-11 07:29:30 -0800 | [diff] [blame] | 119 | const struct line_map *map; |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 120 | const uchar *result = NULL; |
Manuel López-Ibáñez | 1bb6466 | 2008-07-21 09:33:38 +0000 | [diff] [blame] | 121 | linenum_type number = 1; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 122 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 123 | switch (node->value.builtin) |
| 124 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 125 | default: |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 126 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 127 | NODE_NAME (node)); |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 128 | break; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 129 | |
Grigory Zagorodnev | be8ac3e | 2006-02-18 09:25:31 +0000 | [diff] [blame] | 130 | case BT_TIMESTAMP: |
| 131 | { |
| 132 | cpp_buffer *pbuffer = cpp_get_buffer (pfile); |
| 133 | if (pbuffer->timestamp == NULL) |
| 134 | { |
| 135 | /* Initialize timestamp value of the assotiated file. */ |
| 136 | struct _cpp_file *file = cpp_get_file (pbuffer); |
| 137 | if (file) |
| 138 | { |
| 139 | /* Generate __TIMESTAMP__ string, that represents |
| 140 | the date and time of the last modification |
| 141 | of the current source file. The string constant |
| 142 | looks like "Sun Sep 16 01:03:52 1973". */ |
| 143 | struct tm *tb = NULL; |
| 144 | struct stat *st = _cpp_get_file_stat (file); |
| 145 | if (st) |
| 146 | tb = localtime (&st->st_mtime); |
| 147 | if (tb) |
| 148 | { |
| 149 | char *str = asctime (tb); |
| 150 | size_t len = strlen (str); |
| 151 | unsigned char *buf = _cpp_unaligned_alloc (pfile, len + 2); |
| 152 | buf[0] = '"'; |
| 153 | strcpy ((char *) buf + 1, str); |
| 154 | buf[len] = '"'; |
| 155 | pbuffer->timestamp = buf; |
| 156 | } |
| 157 | else |
| 158 | { |
| 159 | cpp_errno (pfile, CPP_DL_WARNING, |
| 160 | "could not determine file timestamp"); |
Kris Van Hees | b6baa67 | 2008-04-18 13:58:08 +0000 | [diff] [blame] | 161 | pbuffer->timestamp = UC"\"??? ??? ?? ??:??:?? ????\""; |
Grigory Zagorodnev | be8ac3e | 2006-02-18 09:25:31 +0000 | [diff] [blame] | 162 | } |
| 163 | } |
| 164 | } |
| 165 | result = pbuffer->timestamp; |
| 166 | } |
| 167 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 168 | case BT_FILE: |
| 169 | case BT_BASE_FILE: |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 170 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 171 | unsigned int len; |
Neil Booth | 0bda476 | 2000-12-11 07:45:16 +0000 | [diff] [blame] | 172 | const char *name; |
Neil Booth | 562a5c2 | 2002-04-21 18:46:42 +0000 | [diff] [blame] | 173 | uchar *buf; |
Per Bothner | 500bee0 | 2004-04-22 19:22:27 -0700 | [diff] [blame] | 174 | map = linemap_lookup (pfile->line_table, pfile->line_table->highest_line); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 175 | |
Neil Booth | 0bda476 | 2000-12-11 07:45:16 +0000 | [diff] [blame] | 176 | if (node->value.builtin == BT_BASE_FILE) |
Neil Booth | bb74c96 | 2001-08-17 22:23:49 +0000 | [diff] [blame] | 177 | while (! MAIN_FILE_P (map)) |
Per Bothner | 50f59cd | 2004-01-19 21:30:18 -0800 | [diff] [blame] | 178 | map = INCLUDED_FROM (pfile->line_table, map); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 179 | |
Neil Booth | bb74c96 | 2001-08-17 22:23:49 +0000 | [diff] [blame] | 180 | name = map->to_file; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 181 | len = strlen (name); |
Andrew Pinski | 651ed94 | 2005-11-04 00:23:01 +0000 | [diff] [blame] | 182 | buf = _cpp_unaligned_alloc (pfile, len * 2 + 3); |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 183 | result = buf; |
| 184 | *buf = '"'; |
| 185 | buf = cpp_quote_string (buf + 1, (const unsigned char *) name, len); |
| 186 | *buf++ = '"'; |
| 187 | *buf = '\0'; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 188 | } |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 189 | break; |
| 190 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 191 | case BT_INCLUDE_LEVEL: |
Neil Booth | d8693c6 | 2001-08-21 23:05:12 +0000 | [diff] [blame] | 192 | /* The line map depth counts the primary source as level 1, but |
| 193 | historically __INCLUDE_DEPTH__ has called the primary source |
| 194 | level 0. */ |
Per Bothner | 50f59cd | 2004-01-19 21:30:18 -0800 | [diff] [blame] | 195 | number = pfile->line_table->depth - 1; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 196 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 197 | |
| 198 | case BT_SPECLINE: |
Per Bothner | 500bee0 | 2004-04-22 19:22:27 -0700 | [diff] [blame] | 199 | map = &pfile->line_table->maps[pfile->line_table->used-1]; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 200 | /* If __LINE__ is embedded in a macro, it must expand to the |
| 201 | line of the macro's invocation, not its definition. |
| 202 | Otherwise things like assert() will not work properly. */ |
Manuel López-Ibáñez | 1bb6466 | 2008-07-21 09:33:38 +0000 | [diff] [blame] | 203 | number = SOURCE_LINE (map, |
| 204 | CPP_OPTION (pfile, traditional) |
| 205 | ? pfile->line_table->highest_line |
| 206 | : pfile->cur_token[-1].src_loc); |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 207 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 208 | |
Zack Weinberg | 5279d73 | 2002-05-16 19:03:02 +0000 | [diff] [blame] | 209 | /* __STDC__ has the value 1 under normal circumstances. |
| 210 | However, if (a) we are in a system header, (b) the option |
Zack Weinberg | 2a1dc0d | 2002-05-21 21:55:37 +0000 | [diff] [blame] | 211 | stdc_0_in_system_headers is true (set by target config), and |
| 212 | (c) we are not in strictly conforming mode, then it has the |
Jakub Jelinek | 8390099 | 2006-01-23 22:50:15 +0100 | [diff] [blame] | 213 | value 0. (b) and (c) are already checked in cpp_init_builtins. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 214 | case BT_STDC: |
Jakub Jelinek | 8390099 | 2006-01-23 22:50:15 +0100 | [diff] [blame] | 215 | if (cpp_in_system_header (pfile)) |
| 216 | number = 0; |
| 217 | else |
| 218 | number = 1; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 219 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 220 | |
| 221 | case BT_DATE: |
| 222 | case BT_TIME: |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 223 | if (pfile->date == NULL) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 224 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 225 | /* Allocate __DATE__ and __TIME__ strings from permanent |
| 226 | storage. We only do this once, and don't generate them |
| 227 | at init time, because time() and localtime() are very |
| 228 | slow on some systems. */ |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 229 | time_t tt; |
| 230 | struct tm *tb = NULL; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 231 | |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 232 | /* (time_t) -1 is a legitimate value for "number of seconds |
| 233 | since the Epoch", so we have to do a little dance to |
| 234 | distinguish that from a genuine error. */ |
| 235 | errno = 0; |
| 236 | tt = time(NULL); |
| 237 | if (tt != (time_t)-1 || errno == 0) |
| 238 | tb = localtime (&tt); |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 239 | |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 240 | if (tb) |
| 241 | { |
| 242 | pfile->date = _cpp_unaligned_alloc (pfile, |
| 243 | sizeof ("\"Oct 11 1347\"")); |
| 244 | sprintf ((char *) pfile->date, "\"%s %2d %4d\"", |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 245 | monthnames[tb->tm_mon], tb->tm_mday, |
| 246 | tb->tm_year + 1900); |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 247 | |
| 248 | pfile->time = _cpp_unaligned_alloc (pfile, |
| 249 | sizeof ("\"12:34:56\"")); |
| 250 | sprintf ((char *) pfile->time, "\"%02d:%02d:%02d\"", |
| 251 | tb->tm_hour, tb->tm_min, tb->tm_sec); |
| 252 | } |
| 253 | else |
| 254 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 255 | cpp_errno (pfile, CPP_DL_WARNING, |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 256 | "could not determine date and time"); |
| 257 | |
Kris Van Hees | b6baa67 | 2008-04-18 13:58:08 +0000 | [diff] [blame] | 258 | pfile->date = UC"\"??? ?? ????\""; |
| 259 | pfile->time = UC"\"??:??:??\""; |
Zack Weinberg | 56da720 | 2002-08-02 04:18:16 +0000 | [diff] [blame] | 260 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 261 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 262 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 263 | if (node->value.builtin == BT_DATE) |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 264 | result = pfile->date; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 265 | else |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 266 | result = pfile->time; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 267 | break; |
Ollie Wild | a702045 | 2007-05-24 20:55:36 +0000 | [diff] [blame] | 268 | |
| 269 | case BT_COUNTER: |
Ollie Wild | ccfc4c9 | 2007-07-30 18:29:20 +0000 | [diff] [blame] | 270 | if (CPP_OPTION (pfile, directives_only) && pfile->state.in_directive) |
| 271 | cpp_error (pfile, CPP_DL_ERROR, |
| 272 | "__COUNTER__ expanded inside directive with -fdirectives-only"); |
Ollie Wild | a702045 | 2007-05-24 20:55:36 +0000 | [diff] [blame] | 273 | number = pfile->counter++; |
| 274 | break; |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 275 | } |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 276 | |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 277 | if (result == NULL) |
| 278 | { |
| 279 | /* 21 bytes holds all NUL-terminated unsigned 64-bit numbers. */ |
| 280 | result = _cpp_unaligned_alloc (pfile, 21); |
| 281 | sprintf ((char *) result, "%u", number); |
| 282 | } |
| 283 | |
| 284 | return result; |
| 285 | } |
| 286 | |
| 287 | /* Convert builtin macros like __FILE__ to a token and push it on the |
Zack Weinberg | 21b1149 | 2004-09-09 19:16:56 +0000 | [diff] [blame] | 288 | context stack. Also handles _Pragma, for which a new token may not |
| 289 | be created. Returns 1 if it generates a new token context, 0 to |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 290 | return the token to the caller. */ |
| 291 | static int |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 292 | builtin_macro (cpp_reader *pfile, cpp_hashnode *node) |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 293 | { |
| 294 | const uchar *buf; |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 295 | size_t len; |
| 296 | char *nbuf; |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 297 | |
| 298 | if (node->value.builtin == BT_PRAGMA) |
| 299 | { |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 300 | /* Don't interpret _Pragma within directives. The standard is |
| 301 | not clear on this, but to me this makes most sense. */ |
| 302 | if (pfile->state.in_directive) |
| 303 | return 0; |
| 304 | |
Tom Tromey | 5b9a40d | 2007-10-31 14:50:13 +0000 | [diff] [blame] | 305 | return _cpp_do__Pragma (pfile); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 306 | } |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 307 | |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 308 | buf = _cpp_builtin_macro_text (pfile, node); |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 309 | len = ustrlen (buf); |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 310 | nbuf = (char *) alloca (len + 1); |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 311 | memcpy (nbuf, buf, len); |
| 312 | nbuf[len]='\n'; |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 313 | |
Per Bothner | 40de9f7 | 2003-10-02 07:30:34 +0000 | [diff] [blame] | 314 | cpp_push_buffer (pfile, (uchar *) nbuf, len, /* from_stage3 */ true); |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 315 | _cpp_clean_line (pfile); |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 316 | |
| 317 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ |
| 318 | pfile->cur_token = _cpp_temp_token (pfile); |
Richard Henderson | bc4071d | 2006-01-04 08:33:38 -0800 | [diff] [blame] | 319 | _cpp_push_token_context (pfile, NULL, _cpp_lex_direct (pfile), 1); |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 320 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 321 | cpp_error (pfile, CPP_DL_ICE, "invalid built-in macro \"%s\"", |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 322 | NODE_NAME (node)); |
| 323 | _cpp_pop_buffer (pfile); |
| 324 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 325 | return 1; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 326 | } |
| 327 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 328 | /* Copies SRC, of length LEN, to DEST, adding backslashes before all |
Andrew Pinski | 651ed94 | 2005-11-04 00:23:01 +0000 | [diff] [blame] | 329 | backslashes and double quotes. DEST must be of sufficient size. |
| 330 | Returns a pointer to the end of the string. */ |
Neil Booth | 562a5c2 | 2002-04-21 18:46:42 +0000 | [diff] [blame] | 331 | uchar * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 332 | cpp_quote_string (uchar *dest, const uchar *src, unsigned int len) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 333 | { |
| 334 | while (len--) |
| 335 | { |
Neil Booth | 562a5c2 | 2002-04-21 18:46:42 +0000 | [diff] [blame] | 336 | uchar c = *src++; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 337 | |
| 338 | if (c == '\\' || c == '"') |
| 339 | { |
| 340 | *dest++ = '\\'; |
| 341 | *dest++ = c; |
| 342 | } |
| 343 | else |
Andrew Pinski | 651ed94 | 2005-11-04 00:23:01 +0000 | [diff] [blame] | 344 | *dest++ = c; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | return dest; |
| 348 | } |
| 349 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 350 | /* Convert a token sequence ARG to a single string token according to |
| 351 | the rules of the ISO C #-operator. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 352 | static const cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 353 | stringify_arg (cpp_reader *pfile, macro_arg *arg) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 354 | { |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 355 | unsigned char *dest; |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 356 | unsigned int i, escape_it, backslash_count = 0; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 357 | const cpp_token *source = NULL; |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 358 | size_t len; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 359 | |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 360 | if (BUFF_ROOM (pfile->u_buff) < 3) |
| 361 | _cpp_extend_buff (pfile, &pfile->u_buff, 3); |
| 362 | dest = BUFF_FRONT (pfile->u_buff); |
| 363 | *dest++ = '"'; |
| 364 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 365 | /* Loop, reading in the argument's tokens. */ |
| 366 | for (i = 0; i < arg->count; i++) |
| 367 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 368 | const cpp_token *token = arg->first[i]; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 369 | |
| 370 | if (token->type == CPP_PADDING) |
| 371 | { |
Joseph Myers | 18f41a1 | 2009-04-12 23:20:02 +0100 | [diff] [blame] | 372 | if (source == NULL |
| 373 | || (!(source->flags & PREV_WHITE) |
| 374 | && token->val.source == NULL)) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 375 | source = token->val.source; |
| 376 | continue; |
| 377 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 378 | |
Kris Van Hees | b6baa67 | 2008-04-18 13:58:08 +0000 | [diff] [blame] | 379 | escape_it = (token->type == CPP_STRING || token->type == CPP_CHAR |
| 380 | || token->type == CPP_WSTRING || token->type == CPP_STRING |
| 381 | || token->type == CPP_STRING32 || token->type == CPP_CHAR32 |
| 382 | || token->type == CPP_STRING16 || token->type == CPP_CHAR16); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 383 | |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 384 | /* Room for each char being written in octal, initial space and |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 385 | final quote and NUL. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 386 | len = cpp_token_len (token); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 387 | if (escape_it) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 388 | len *= 4; |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 389 | len += 3; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 390 | |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 391 | if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < len) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 392 | { |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 393 | size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff); |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 394 | _cpp_extend_buff (pfile, &pfile->u_buff, len); |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 395 | dest = BUFF_FRONT (pfile->u_buff) + len_so_far; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 396 | } |
| 397 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 398 | /* Leading white space? */ |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 399 | if (dest - 1 != BUFF_FRONT (pfile->u_buff)) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 400 | { |
| 401 | if (source == NULL) |
| 402 | source = token; |
| 403 | if (source->flags & PREV_WHITE) |
| 404 | *dest++ = ' '; |
| 405 | } |
| 406 | source = NULL; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 407 | |
| 408 | if (escape_it) |
| 409 | { |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 410 | _cpp_buff *buff = _cpp_get_buff (pfile, len); |
| 411 | unsigned char *buf = BUFF_FRONT (buff); |
Geoffrey Keating | 47e2049 | 2005-03-12 10:44:06 +0000 | [diff] [blame] | 412 | len = cpp_spell_token (pfile, token, buf, true) - buf; |
Zack Weinberg | dcc229e | 2002-03-14 18:17:18 +0000 | [diff] [blame] | 413 | dest = cpp_quote_string (dest, buf, len); |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 414 | _cpp_release_buff (pfile, buff); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 415 | } |
| 416 | else |
Geoffrey Keating | 47e2049 | 2005-03-12 10:44:06 +0000 | [diff] [blame] | 417 | dest = cpp_spell_token (pfile, token, dest, true); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 418 | |
Neil Booth | 1067694 | 2003-04-22 19:28:00 +0000 | [diff] [blame] | 419 | if (token->type == CPP_OTHER && token->val.str.text[0] == '\\') |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 420 | backslash_count++; |
| 421 | else |
| 422 | backslash_count = 0; |
| 423 | } |
| 424 | |
| 425 | /* Ignore the final \ of invalid string literals. */ |
| 426 | if (backslash_count & 1) |
| 427 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 428 | cpp_error (pfile, CPP_DL_WARNING, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 429 | "invalid string literal, ignoring final '\\'"); |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 430 | dest--; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 431 | } |
| 432 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 433 | /* Commit the memory, including NUL, and return the token. */ |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 434 | *dest++ = '"'; |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 435 | len = dest - BUFF_FRONT (pfile->u_buff); |
| 436 | BUFF_FRONT (pfile->u_buff) = dest + 1; |
| 437 | return new_string_token (pfile, dest - len, len); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 438 | } |
| 439 | |
Kazu Hirata | da7d830 | 2002-09-22 02:03:17 +0000 | [diff] [blame] | 440 | /* Try to paste two tokens. On success, return nonzero. In any |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 441 | case, PLHS is updated to point to the pasted token, which is |
| 442 | guaranteed to not have the PASTE_LEFT flag set. */ |
| 443 | static bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 444 | paste_tokens (cpp_reader *pfile, const cpp_token **plhs, const cpp_token *rhs) |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 445 | { |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 446 | unsigned char *buf, *end, *lhsend; |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 447 | cpp_token *lhs; |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 448 | unsigned int len; |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 449 | |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 450 | len = cpp_token_len (*plhs) + cpp_token_len (rhs) + 1; |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 451 | buf = (unsigned char *) alloca (len); |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 452 | end = lhsend = cpp_spell_token (pfile, *plhs, buf, false); |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 453 | |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 454 | /* Avoid comment headers, since they are still processed in stage 3. |
| 455 | It is simpler to insert a space here, rather than modifying the |
| 456 | lexer to ignore comments in some circumstances. Simply returning |
| 457 | false doesn't work, since we want to clear the PASTE_LEFT flag. */ |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 458 | if ((*plhs)->type == CPP_DIV && rhs->type != CPP_EQ) |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 459 | *end++ = ' '; |
Tom Tromey | f373b44 | 2007-11-01 18:20:48 +0000 | [diff] [blame] | 460 | /* In one obscure case we might see padding here. */ |
| 461 | if (rhs->type != CPP_PADDING) |
| 462 | end = cpp_spell_token (pfile, rhs, end, false); |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 463 | *end = '\n'; |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 464 | |
Per Bothner | 40de9f7 | 2003-10-02 07:30:34 +0000 | [diff] [blame] | 465 | cpp_push_buffer (pfile, buf, end - buf, /* from_stage3 */ true); |
Neil Booth | 26aea07 | 2003-04-19 00:22:51 +0000 | [diff] [blame] | 466 | _cpp_clean_line (pfile); |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 467 | |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 468 | /* Set pfile->cur_token as required by _cpp_lex_direct. */ |
| 469 | pfile->cur_token = _cpp_temp_token (pfile); |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 470 | lhs = _cpp_lex_direct (pfile); |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 471 | if (pfile->buffer->cur != pfile->buffer->rlimit) |
| 472 | { |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 473 | source_location saved_loc = lhs->src_loc; |
| 474 | |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 475 | _cpp_pop_buffer (pfile); |
| 476 | _cpp_backup_tokens (pfile, 1); |
| 477 | *lhsend = '\0'; |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 478 | |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 479 | /* We have to remove the PASTE_LEFT flag from the old lhs, but |
| 480 | we want to keep the new location. */ |
| 481 | *lhs = **plhs; |
| 482 | *plhs = lhs; |
| 483 | lhs->src_loc = saved_loc; |
| 484 | lhs->flags &= ~PASTE_LEFT; |
| 485 | |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 486 | /* Mandatory error for all apart from assembler. */ |
| 487 | if (CPP_OPTION (pfile, lang) != CLK_ASM) |
| 488 | cpp_error (pfile, CPP_DL_ERROR, |
| 489 | "pasting \"%s\" and \"%s\" does not give a valid preprocessing token", |
| 490 | buf, cpp_token_as_text (pfile, rhs)); |
| 491 | return false; |
| 492 | } |
| 493 | |
Tom Tromey | fca35e1 | 2007-05-02 19:33:44 +0000 | [diff] [blame] | 494 | *plhs = lhs; |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 495 | _cpp_pop_buffer (pfile); |
| 496 | return true; |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 497 | } |
| 498 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 499 | /* Handles an arbitrarily long sequence of ## operators, with initial |
| 500 | operand LHS. This implementation is left-associative, |
| 501 | non-recursive, and finishes a paste before handling succeeding |
| 502 | ones. If a paste fails, we back up to the RHS of the failing ## |
| 503 | operator before pushing the context containing the result of prior |
| 504 | successful pastes, with the effect that the RHS appears in the |
| 505 | output stream after the pasted LHS normally. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 506 | static void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 507 | paste_all_tokens (cpp_reader *pfile, const cpp_token *lhs) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 508 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 509 | const cpp_token *rhs; |
| 510 | cpp_context *context = pfile->context; |
| 511 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 512 | do |
| 513 | { |
| 514 | /* Take the token directly from the current context. We can do |
| 515 | this, because we are in the replacement list of either an |
| 516 | object-like macro, or a function-like macro with arguments |
| 517 | inserted. In either case, the constraints to #define |
Neil Booth | d63eefb | 2000-11-20 23:59:26 +0000 | [diff] [blame] | 518 | guarantee we have at least one more token. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 519 | if (context->direct_p) |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 520 | rhs = FIRST (context).token++; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 521 | else |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 522 | rhs = *FIRST (context).ptoken++; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 523 | |
| 524 | if (rhs->type == CPP_PADDING) |
Tom Tromey | f373b44 | 2007-11-01 18:20:48 +0000 | [diff] [blame] | 525 | { |
| 526 | if (rhs->flags & PASTE_LEFT) |
| 527 | abort (); |
| 528 | } |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 529 | if (!paste_tokens (pfile, &lhs, rhs)) |
Jakub Jelinek | de000d2 | 2006-10-12 11:25:59 +0200 | [diff] [blame] | 530 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 531 | } |
| 532 | while (rhs->flags & PASTE_LEFT); |
| 533 | |
Neil Booth | c9e7a60 | 2001-09-27 12:59:38 +0000 | [diff] [blame] | 534 | /* Put the resulting token in its own context. */ |
Richard Henderson | bc4071d | 2006-01-04 08:33:38 -0800 | [diff] [blame] | 535 | _cpp_push_token_context (pfile, NULL, lhs, 1); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 536 | } |
| 537 | |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 538 | /* Returns TRUE if the number of arguments ARGC supplied in an |
| 539 | invocation of the MACRO referenced by NODE is valid. An empty |
| 540 | invocation to a macro with no parameters should pass ARGC as zero. |
| 541 | |
| 542 | Note that MACRO cannot necessarily be deduced from NODE, in case |
| 543 | NODE was redefined whilst collecting arguments. */ |
| 544 | bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 545 | _cpp_arguments_ok (cpp_reader *pfile, cpp_macro *macro, const cpp_hashnode *node, unsigned int argc) |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 546 | { |
| 547 | if (argc == macro->paramc) |
| 548 | return true; |
| 549 | |
| 550 | if (argc < macro->paramc) |
| 551 | { |
| 552 | /* As an extension, a rest argument is allowed to not appear in |
| 553 | the invocation at all. |
| 554 | e.g. #define debug(format, args...) something |
| 555 | debug("string"); |
| 556 | |
| 557 | This is exactly the same as if there had been an empty rest |
| 558 | argument - debug("string", ). */ |
| 559 | |
| 560 | if (argc + 1 == macro->paramc && macro->variadic) |
| 561 | { |
| 562 | if (CPP_PEDANTIC (pfile) && ! macro->syshdr) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 563 | cpp_error (pfile, CPP_DL_PEDWARN, |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 564 | "ISO C99 requires rest arguments to be used"); |
| 565 | return true; |
| 566 | } |
| 567 | |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 568 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 569 | "macro \"%s\" requires %u arguments, but only %u given", |
| 570 | NODE_NAME (node), macro->paramc, argc); |
| 571 | } |
| 572 | else |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 573 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 574 | "macro \"%s\" passed %u arguments, but takes just %u", |
| 575 | NODE_NAME (node), argc, macro->paramc); |
| 576 | |
| 577 | return false; |
| 578 | } |
| 579 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 580 | /* Reads and returns the arguments to a function-like macro |
| 581 | invocation. Assumes the opening parenthesis has been processed. |
| 582 | If there is an error, emits an appropriate diagnostic and returns |
| 583 | NULL. Each argument is terminated by a CPP_EOF token, for the |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 584 | future benefit of expand_arg(). If there are any deferred |
| 585 | #pragma directives among macro arguments, store pointers to the |
| 586 | CPP_PRAGMA ... CPP_PRAGMA_EOL tokens into *PRAGMA_BUFF buffer. */ |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 587 | static _cpp_buff * |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 588 | collect_args (cpp_reader *pfile, const cpp_hashnode *node, |
| 589 | _cpp_buff **pragma_buff) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 590 | { |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 591 | _cpp_buff *buff, *base_buff; |
| 592 | cpp_macro *macro; |
| 593 | macro_arg *args, *arg; |
| 594 | const cpp_token *token; |
| 595 | unsigned int argc; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 596 | |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 597 | macro = node->value.macro; |
| 598 | if (macro->paramc) |
| 599 | argc = macro->paramc; |
| 600 | else |
| 601 | argc = 1; |
| 602 | buff = _cpp_get_buff (pfile, argc * (50 * sizeof (cpp_token *) |
| 603 | + sizeof (macro_arg))); |
| 604 | base_buff = buff; |
| 605 | args = (macro_arg *) buff->base; |
| 606 | memset (args, 0, argc * sizeof (macro_arg)); |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 607 | buff->cur = (unsigned char *) &args[argc]; |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 608 | arg = args, argc = 0; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 609 | |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 610 | /* Collect the tokens making up each argument. We don't yet know |
| 611 | how many arguments have been supplied, whether too many or too |
| 612 | few. Hence the slightly bizarre usage of "argc" and "arg". */ |
| 613 | do |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 614 | { |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 615 | unsigned int paren_depth = 0; |
| 616 | unsigned int ntokens = 0; |
| 617 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 618 | argc++; |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 619 | arg->first = (const cpp_token **) buff->cur; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 620 | |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 621 | for (;;) |
| 622 | { |
| 623 | /* Require space for 2 new tokens (including a CPP_EOF). */ |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 624 | if ((unsigned char *) &arg->first[ntokens + 2] > buff->limit) |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 625 | { |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 626 | buff = _cpp_append_extend_buff (pfile, buff, |
| 627 | 1000 * sizeof (cpp_token *)); |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 628 | arg->first = (const cpp_token **) buff->cur; |
| 629 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 630 | |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 631 | token = cpp_get_token (pfile); |
| 632 | |
| 633 | if (token->type == CPP_PADDING) |
| 634 | { |
| 635 | /* Drop leading padding. */ |
| 636 | if (ntokens == 0) |
| 637 | continue; |
| 638 | } |
| 639 | else if (token->type == CPP_OPEN_PAREN) |
| 640 | paren_depth++; |
| 641 | else if (token->type == CPP_CLOSE_PAREN) |
| 642 | { |
| 643 | if (paren_depth-- == 0) |
| 644 | break; |
| 645 | } |
| 646 | else if (token->type == CPP_COMMA) |
| 647 | { |
| 648 | /* A comma does not terminate an argument within |
| 649 | parentheses or as part of a variable argument. */ |
| 650 | if (paren_depth == 0 |
| 651 | && ! (macro->variadic && argc == macro->paramc)) |
| 652 | break; |
| 653 | } |
| 654 | else if (token->type == CPP_EOF |
| 655 | || (token->type == CPP_HASH && token->flags & BOL)) |
| 656 | break; |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 657 | else if (token->type == CPP_PRAGMA) |
| 658 | { |
| 659 | cpp_token *newtok = _cpp_temp_token (pfile); |
| 660 | |
| 661 | /* CPP_PRAGMA token lives in directive_result, which will |
| 662 | be overwritten on the next directive. */ |
| 663 | *newtok = *token; |
| 664 | token = newtok; |
| 665 | do |
| 666 | { |
| 667 | if (*pragma_buff == NULL |
| 668 | || BUFF_ROOM (*pragma_buff) < sizeof (cpp_token *)) |
| 669 | { |
| 670 | _cpp_buff *next; |
| 671 | if (*pragma_buff == NULL) |
| 672 | *pragma_buff |
| 673 | = _cpp_get_buff (pfile, 32 * sizeof (cpp_token *)); |
| 674 | else |
| 675 | { |
| 676 | next = *pragma_buff; |
| 677 | *pragma_buff |
| 678 | = _cpp_get_buff (pfile, |
| 679 | (BUFF_FRONT (*pragma_buff) |
| 680 | - (*pragma_buff)->base) * 2); |
| 681 | (*pragma_buff)->next = next; |
| 682 | } |
| 683 | } |
| 684 | *(const cpp_token **) BUFF_FRONT (*pragma_buff) = token; |
| 685 | BUFF_FRONT (*pragma_buff) += sizeof (cpp_token *); |
| 686 | if (token->type == CPP_PRAGMA_EOL) |
| 687 | break; |
| 688 | token = cpp_get_token (pfile); |
| 689 | } |
| 690 | while (token->type != CPP_EOF); |
| 691 | |
| 692 | /* In deferred pragmas parsing_args and prevent_expansion |
| 693 | had been changed, reset it. */ |
| 694 | pfile->state.parsing_args = 2; |
| 695 | pfile->state.prevent_expansion = 1; |
| 696 | |
| 697 | if (token->type == CPP_EOF) |
| 698 | break; |
| 699 | else |
| 700 | continue; |
| 701 | } |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 702 | |
| 703 | arg->first[ntokens++] = token; |
| 704 | } |
| 705 | |
| 706 | /* Drop trailing padding. */ |
| 707 | while (ntokens > 0 && arg->first[ntokens - 1]->type == CPP_PADDING) |
| 708 | ntokens--; |
| 709 | |
| 710 | arg->count = ntokens; |
| 711 | arg->first[ntokens] = &pfile->eof; |
| 712 | |
| 713 | /* Terminate the argument. Excess arguments loop back and |
| 714 | overwrite the final legitimate argument, before failing. */ |
| 715 | if (argc <= macro->paramc) |
| 716 | { |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 717 | buff->cur = (unsigned char *) &arg->first[ntokens + 1]; |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 718 | if (argc != macro->paramc) |
| 719 | arg++; |
| 720 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 721 | } |
Neil Booth | e808ec9 | 2002-02-27 07:24:53 +0000 | [diff] [blame] | 722 | while (token->type != CPP_CLOSE_PAREN && token->type != CPP_EOF); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 723 | |
Neil Booth | e808ec9 | 2002-02-27 07:24:53 +0000 | [diff] [blame] | 724 | if (token->type == CPP_EOF) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 725 | { |
Neil Booth | ece54d5 | 2001-09-28 09:40:22 +0000 | [diff] [blame] | 726 | /* We still need the CPP_EOF to end directives, and to end |
| 727 | pre-expansion of a macro argument. Step back is not |
| 728 | unconditional, since we don't want to return a CPP_EOF to our |
| 729 | callers at the end of an -include-d file. */ |
Neil Booth | e808ec9 | 2002-02-27 07:24:53 +0000 | [diff] [blame] | 730 | if (pfile->context->prev || pfile->state.in_directive) |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 731 | _cpp_backup_tokens (pfile, 1); |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 732 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 733 | "unterminated argument list invoking macro \"%s\"", |
Neil Booth | a28c5035 | 2001-05-16 22:02:09 +0000 | [diff] [blame] | 734 | NODE_NAME (node)); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 735 | } |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 736 | else |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 737 | { |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 738 | /* A single empty argument is counted as no argument. */ |
| 739 | if (argc == 1 && macro->paramc == 0 && args[0].count == 0) |
| 740 | argc = 0; |
| 741 | if (_cpp_arguments_ok (pfile, macro, node, argc)) |
Neil Booth | 58551c2 | 2002-08-06 20:35:46 +0000 | [diff] [blame] | 742 | { |
| 743 | /* GCC has special semantics for , ## b where b is a varargs |
| 744 | parameter: we remove the comma if b was omitted entirely. |
| 745 | If b was merely an empty argument, the comma is retained. |
| 746 | If the macro takes just one (varargs) parameter, then we |
| 747 | retain the comma only if we are standards conforming. |
| 748 | |
| 749 | If FIRST is NULL replace_args () swallows the comma. */ |
| 750 | if (macro->variadic && (argc < macro->paramc |
| 751 | || (argc == 1 && args[0].count == 0 |
| 752 | && !CPP_OPTION (pfile, std)))) |
| 753 | args[macro->paramc - 1].first = NULL; |
| 754 | return base_buff; |
| 755 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 756 | } |
| 757 | |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 758 | /* An error occurred. */ |
Neil Booth | b8af0ca | 2001-09-26 17:52:50 +0000 | [diff] [blame] | 759 | _cpp_release_buff (pfile, base_buff); |
| 760 | return NULL; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 761 | } |
| 762 | |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 763 | /* Search for an opening parenthesis to the macro of NODE, in such a |
| 764 | way that, if none is found, we don't lose the information in any |
| 765 | intervening padding tokens. If we find the parenthesis, collect |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 766 | the arguments and return the buffer containing them. PRAGMA_BUFF |
| 767 | argument is the same as in collect_args. */ |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 768 | static _cpp_buff * |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 769 | funlike_invocation_p (cpp_reader *pfile, cpp_hashnode *node, |
| 770 | _cpp_buff **pragma_buff) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 771 | { |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 772 | const cpp_token *token, *padding = NULL; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 773 | |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 774 | for (;;) |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 775 | { |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 776 | token = cpp_get_token (pfile); |
| 777 | if (token->type != CPP_PADDING) |
| 778 | break; |
| 779 | if (padding == NULL |
| 780 | || (!(padding->flags & PREV_WHITE) && token->val.source == NULL)) |
| 781 | padding = token; |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 782 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 783 | |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 784 | if (token->type == CPP_OPEN_PAREN) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 785 | { |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 786 | pfile->state.parsing_args = 2; |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 787 | return collect_args (pfile, node, pragma_buff); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 788 | } |
| 789 | |
Neil Booth | 9ac3b1b | 2002-04-21 16:17:55 +0000 | [diff] [blame] | 790 | /* CPP_EOF can be the end of macro arguments, or the end of the |
| 791 | file. We mustn't back up over the latter. Ugh. */ |
| 792 | if (token->type != CPP_EOF || token == &pfile->eof) |
| 793 | { |
| 794 | /* Back up. We may have skipped padding, in which case backing |
| 795 | up more than one token when expanding macros is in general |
| 796 | too difficult. We re-insert it in its own context. */ |
| 797 | _cpp_backup_tokens (pfile, 1); |
| 798 | if (padding) |
Richard Henderson | bc4071d | 2006-01-04 08:33:38 -0800 | [diff] [blame] | 799 | _cpp_push_token_context (pfile, NULL, padding, 1); |
Neil Booth | 9ac3b1b | 2002-04-21 16:17:55 +0000 | [diff] [blame] | 800 | } |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 801 | |
| 802 | return NULL; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 803 | } |
| 804 | |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 805 | /* Return the real number of tokens in the expansion of MACRO. */ |
| 806 | static inline unsigned int |
| 807 | macro_real_token_count (const cpp_macro *macro) |
| 808 | { |
| 809 | unsigned int i; |
| 810 | if (__builtin_expect (!macro->extra_tokens, true)) |
| 811 | return macro->count; |
| 812 | for (i = 0; i < macro->count; i++) |
| 813 | if (macro->exp.tokens[i].type == CPP_PASTE) |
| 814 | return i; |
| 815 | abort (); |
| 816 | } |
| 817 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 818 | /* Push the context of a macro with hash entry NODE onto the context |
| 819 | stack. If we can successfully expand the macro, we push a context |
| 820 | containing its yet-to-be-rescanned replacement list and return one. |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 821 | If there were additionally any unexpanded deferred #pragma directives |
| 822 | among macro arguments, push another context containing the |
| 823 | pragma tokens before the yet-to-be-rescanned replacement list |
| 824 | and return two. Otherwise, we don't push a context and return zero. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 825 | static int |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 826 | enter_macro_context (cpp_reader *pfile, cpp_hashnode *node, |
| 827 | const cpp_token *result) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 828 | { |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 829 | /* The presence of a macro invalidates a file's controlling macro. */ |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 830 | pfile->mi_valid = false; |
| 831 | |
Neil Booth | 3620711 | 2002-05-24 19:26:30 +0000 | [diff] [blame] | 832 | pfile->state.angled_headers = false; |
| 833 | |
Joseph Myers | 93d45d9 | 2008-04-02 20:42:53 +0100 | [diff] [blame] | 834 | if ((node->flags & NODE_BUILTIN) && !(node->flags & NODE_USED)) |
| 835 | { |
| 836 | node->flags |= NODE_USED; |
| 837 | if (pfile->cb.used_define) |
| 838 | pfile->cb.used_define (pfile, pfile->directive_line, node); |
| 839 | } |
| 840 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 841 | /* Handle standard macros. */ |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 842 | if (! (node->flags & NODE_BUILTIN)) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 843 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 844 | cpp_macro *macro = node->value.macro; |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 845 | _cpp_buff *pragma_buff = NULL; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 846 | |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 847 | if (macro->fun_like) |
| 848 | { |
| 849 | _cpp_buff *buff; |
| 850 | |
| 851 | pfile->state.prevent_expansion++; |
| 852 | pfile->keep_tokens++; |
| 853 | pfile->state.parsing_args = 1; |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 854 | buff = funlike_invocation_p (pfile, node, &pragma_buff); |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 855 | pfile->state.parsing_args = 0; |
| 856 | pfile->keep_tokens--; |
| 857 | pfile->state.prevent_expansion--; |
| 858 | |
| 859 | if (buff == NULL) |
| 860 | { |
| 861 | if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 862 | cpp_error (pfile, CPP_DL_WARNING, |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 863 | "function-like macro \"%s\" must be used with arguments in traditional C", |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 864 | NODE_NAME (node)); |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 865 | |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 866 | if (pragma_buff) |
| 867 | _cpp_release_buff (pfile, pragma_buff); |
| 868 | |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 869 | return 0; |
| 870 | } |
| 871 | |
Neil Booth | e808ec9 | 2002-02-27 07:24:53 +0000 | [diff] [blame] | 872 | if (macro->paramc > 0) |
| 873 | replace_args (pfile, node, macro, (macro_arg *) buff->base); |
Neil Booth | d6da836 | 2001-10-08 06:15:14 +0000 | [diff] [blame] | 874 | _cpp_release_buff (pfile, buff); |
| 875 | } |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 876 | |
| 877 | /* Disable the macro within its expansion. */ |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 878 | node->flags |= NODE_DISABLED; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 879 | |
Joseph Myers | 93d45d9 | 2008-04-02 20:42:53 +0100 | [diff] [blame] | 880 | if (!(node->flags & NODE_USED)) |
| 881 | { |
| 882 | node->flags |= NODE_USED; |
| 883 | if (pfile->cb.used_define) |
| 884 | pfile->cb.used_define (pfile, pfile->directive_line, node); |
| 885 | } |
| 886 | |
Neil Booth | a69cbaa | 2002-07-23 22:57:49 +0000 | [diff] [blame] | 887 | macro->used = 1; |
| 888 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 889 | if (macro->paramc == 0) |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 890 | _cpp_push_token_context (pfile, node, macro->exp.tokens, |
| 891 | macro_real_token_count (macro)); |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 892 | |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 893 | if (pragma_buff) |
| 894 | { |
| 895 | if (!pfile->state.in_directive) |
| 896 | _cpp_push_token_context (pfile, NULL, |
| 897 | padding_token (pfile, result), 1); |
| 898 | do |
| 899 | { |
| 900 | _cpp_buff *tail = pragma_buff->next; |
| 901 | pragma_buff->next = NULL; |
| 902 | push_ptoken_context (pfile, NULL, pragma_buff, |
| 903 | (const cpp_token **) pragma_buff->base, |
| 904 | ((const cpp_token **) BUFF_FRONT (pragma_buff) |
| 905 | - (const cpp_token **) pragma_buff->base)); |
| 906 | pragma_buff = tail; |
| 907 | } |
| 908 | while (pragma_buff != NULL); |
| 909 | return 2; |
| 910 | } |
| 911 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 912 | return 1; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 913 | } |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 914 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 915 | /* Handle built-in macros and the _Pragma operator. */ |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 916 | return builtin_macro (pfile, node); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 917 | } |
| 918 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 919 | /* Replace the parameters in a function-like macro of NODE with the |
| 920 | actual ARGS, and place the result in a newly pushed token context. |
| 921 | Expand each argument before replacing, unless it is operated upon |
| 922 | by the # or ## operators. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 923 | static void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 924 | replace_args (cpp_reader *pfile, cpp_hashnode *node, cpp_macro *macro, macro_arg *args) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 925 | { |
| 926 | unsigned int i, total; |
| 927 | const cpp_token *src, *limit; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 928 | const cpp_token **dest, **first; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 929 | macro_arg *arg; |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 930 | _cpp_buff *buff; |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 931 | unsigned int count; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 932 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 933 | /* First, fully macro-expand arguments, calculating the number of |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 934 | tokens in the final expansion as we go. The ordering of the if |
| 935 | statements below is subtle; we must handle stringification before |
| 936 | pasting. */ |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 937 | count = macro_real_token_count (macro); |
| 938 | total = count; |
| 939 | limit = macro->exp.tokens + count; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 940 | |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 941 | for (src = macro->exp.tokens; src < limit; src++) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 942 | if (src->type == CPP_MACRO_ARG) |
| 943 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 944 | /* Leading and trailing padding tokens. */ |
| 945 | total += 2; |
| 946 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 947 | /* We have an argument. If it is not being stringified or |
| 948 | pasted it is macro-replaced before insertion. */ |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 949 | arg = &args[src->val.macro_arg.arg_no - 1]; |
Neil Booth | 4c2b647 | 2000-11-11 13:19:01 +0000 | [diff] [blame] | 950 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 951 | if (src->flags & STRINGIFY_ARG) |
| 952 | { |
| 953 | if (!arg->stringified) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 954 | arg->stringified = stringify_arg (pfile, arg); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 955 | } |
| 956 | else if ((src->flags & PASTE_LEFT) |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 957 | || (src > macro->exp.tokens && (src[-1].flags & PASTE_LEFT))) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 958 | total += arg->count - 1; |
| 959 | else |
| 960 | { |
| 961 | if (!arg->expanded) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 962 | expand_arg (pfile, arg); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 963 | total += arg->expanded_count - 1; |
| 964 | } |
| 965 | } |
| 966 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 967 | /* Now allocate space for the expansion, copy the tokens and replace |
| 968 | the arguments. */ |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 969 | buff = _cpp_get_buff (pfile, total * sizeof (cpp_token *)); |
| 970 | first = (const cpp_token **) buff->base; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 971 | dest = first; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 972 | |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 973 | for (src = macro->exp.tokens; src < limit; src++) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 974 | { |
| 975 | unsigned int count; |
| 976 | const cpp_token **from, **paste_flag; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 977 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 978 | if (src->type != CPP_MACRO_ARG) |
| 979 | { |
| 980 | *dest++ = src; |
| 981 | continue; |
| 982 | } |
| 983 | |
| 984 | paste_flag = 0; |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 985 | arg = &args[src->val.macro_arg.arg_no - 1]; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 986 | if (src->flags & STRINGIFY_ARG) |
| 987 | count = 1, from = &arg->stringified; |
| 988 | else if (src->flags & PASTE_LEFT) |
| 989 | count = arg->count, from = arg->first; |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 990 | else if (src != macro->exp.tokens && (src[-1].flags & PASTE_LEFT)) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 991 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 992 | count = arg->count, from = arg->first; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 993 | if (dest != first) |
| 994 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 995 | if (dest[-1]->type == CPP_COMMA |
| 996 | && macro->variadic |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 997 | && src->val.macro_arg.arg_no == macro->paramc) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 998 | { |
Neil Booth | 58551c2 | 2002-08-06 20:35:46 +0000 | [diff] [blame] | 999 | /* Swallow a pasted comma if from == NULL, otherwise |
| 1000 | drop the paste flag. */ |
| 1001 | if (from == NULL) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1002 | dest--; |
| 1003 | else |
| 1004 | paste_flag = dest - 1; |
| 1005 | } |
| 1006 | /* Remove the paste flag if the RHS is a placemarker. */ |
| 1007 | else if (count == 0) |
| 1008 | paste_flag = dest - 1; |
| 1009 | } |
| 1010 | } |
| 1011 | else |
| 1012 | count = arg->expanded_count, from = arg->expanded; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1013 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1014 | /* Padding on the left of an argument (unless RHS of ##). */ |
Zack Weinberg | a8d0dda | 2003-02-21 18:06:30 +0000 | [diff] [blame] | 1015 | if ((!pfile->state.in_directive || pfile->state.directive_wants_padding) |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 1016 | && src != macro->exp.tokens && !(src[-1].flags & PASTE_LEFT)) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1017 | *dest++ = padding_token (pfile, src); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1018 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1019 | if (count) |
| 1020 | { |
| 1021 | memcpy (dest, from, count * sizeof (cpp_token *)); |
| 1022 | dest += count; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1023 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1024 | /* With a non-empty argument on the LHS of ##, the last |
| 1025 | token should be flagged PASTE_LEFT. */ |
| 1026 | if (src->flags & PASTE_LEFT) |
| 1027 | paste_flag = dest - 1; |
| 1028 | } |
Andrew Haley | e85edc9 | 2008-07-03 10:31:50 +0000 | [diff] [blame] | 1029 | else if (CPP_PEDANTIC (pfile) && ! macro->syshdr |
| 1030 | && ! CPP_OPTION (pfile, c99) |
| 1031 | && ! cpp_in_system_header (pfile)) |
| 1032 | { |
| 1033 | cpp_error (pfile, CPP_DL_PEDWARN, |
| 1034 | "invoking macro %s argument %d: " |
| 1035 | "empty macro arguments are undefined" |
| 1036 | " in ISO C90 and ISO C++98", |
| 1037 | NODE_NAME (node), |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1038 | src->val.macro_arg.arg_no); |
Andrew Haley | e85edc9 | 2008-07-03 10:31:50 +0000 | [diff] [blame] | 1039 | } |
Neil Booth | 4c2b647 | 2000-11-11 13:19:01 +0000 | [diff] [blame] | 1040 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1041 | /* Avoid paste on RHS (even case count == 0). */ |
| 1042 | if (!pfile->state.in_directive && !(src->flags & PASTE_LEFT)) |
| 1043 | *dest++ = &pfile->avoid_paste; |
Neil Booth | 26ec42e | 2001-01-28 11:22:23 +0000 | [diff] [blame] | 1044 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1045 | /* Add a new paste flag, or remove an unwanted one. */ |
| 1046 | if (paste_flag) |
| 1047 | { |
| 1048 | cpp_token *token = _cpp_temp_token (pfile); |
| 1049 | token->type = (*paste_flag)->type; |
Jakub Jelinek | 7309671 | 2005-03-04 16:33:23 +0100 | [diff] [blame] | 1050 | token->val = (*paste_flag)->val; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1051 | if (src->flags & PASTE_LEFT) |
| 1052 | token->flags = (*paste_flag)->flags | PASTE_LEFT; |
| 1053 | else |
| 1054 | token->flags = (*paste_flag)->flags & ~PASTE_LEFT; |
| 1055 | *paste_flag = token; |
| 1056 | } |
| 1057 | } |
Neil Booth | 4c2b647 | 2000-11-11 13:19:01 +0000 | [diff] [blame] | 1058 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1059 | /* Free the expanded arguments. */ |
| 1060 | for (i = 0; i < macro->paramc; i++) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1061 | if (args[i].expanded) |
| 1062 | free (args[i].expanded); |
| 1063 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1064 | push_ptoken_context (pfile, node, buff, first, dest - first); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1065 | } |
| 1066 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1067 | /* Return a special padding token, with padding inherited from SOURCE. */ |
| 1068 | static const cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1069 | padding_token (cpp_reader *pfile, const cpp_token *source) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1070 | { |
| 1071 | cpp_token *result = _cpp_temp_token (pfile); |
| 1072 | |
| 1073 | result->type = CPP_PADDING; |
Paolo Bonzini | be0f1e5 | 2005-02-14 08:52:24 +0000 | [diff] [blame] | 1074 | |
| 1075 | /* Data in GCed data structures cannot be made const so far, so we |
| 1076 | need a cast here. */ |
| 1077 | result->val.source = (cpp_token *) source; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1078 | result->flags = 0; |
| 1079 | return result; |
| 1080 | } |
| 1081 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1082 | /* Get a new uninitialized context. Create a new one if we cannot |
| 1083 | re-use an old one. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1084 | static cpp_context * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1085 | next_context (cpp_reader *pfile) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1086 | { |
| 1087 | cpp_context *result = pfile->context->next; |
| 1088 | |
| 1089 | if (result == 0) |
| 1090 | { |
Bernardo Innocenti | 72bb2c3 | 2004-07-24 20:04:42 +0200 | [diff] [blame] | 1091 | result = XNEW (cpp_context); |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1092 | result->prev = pfile->context; |
| 1093 | result->next = 0; |
| 1094 | pfile->context->next = result; |
| 1095 | } |
| 1096 | |
| 1097 | pfile->context = result; |
| 1098 | return result; |
| 1099 | } |
| 1100 | |
| 1101 | /* Push a list of pointers to tokens. */ |
| 1102 | static void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1103 | push_ptoken_context (cpp_reader *pfile, cpp_hashnode *macro, _cpp_buff *buff, |
| 1104 | const cpp_token **first, unsigned int count) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1105 | { |
| 1106 | cpp_context *context = next_context (pfile); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1107 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1108 | context->direct_p = false; |
| 1109 | context->macro = macro; |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1110 | context->buff = buff; |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1111 | FIRST (context).ptoken = first; |
| 1112 | LAST (context).ptoken = first + count; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | /* Push a list of tokens. */ |
Richard Henderson | bc4071d | 2006-01-04 08:33:38 -0800 | [diff] [blame] | 1116 | void |
| 1117 | _cpp_push_token_context (cpp_reader *pfile, cpp_hashnode *macro, |
| 1118 | const cpp_token *first, unsigned int count) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1119 | { |
| 1120 | cpp_context *context = next_context (pfile); |
| 1121 | |
| 1122 | context->direct_p = true; |
| 1123 | context->macro = macro; |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1124 | context->buff = NULL; |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1125 | FIRST (context).token = first; |
| 1126 | LAST (context).token = first + count; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1129 | /* Push a traditional macro's replacement text. */ |
| 1130 | void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1131 | _cpp_push_text_context (cpp_reader *pfile, cpp_hashnode *macro, |
| 1132 | const uchar *start, size_t len) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1133 | { |
| 1134 | cpp_context *context = next_context (pfile); |
| 1135 | |
| 1136 | context->direct_p = true; |
| 1137 | context->macro = macro; |
| 1138 | context->buff = NULL; |
| 1139 | CUR (context) = start; |
Neil Booth | 1ce676a | 2002-06-09 20:04:17 +0000 | [diff] [blame] | 1140 | RLIMIT (context) = start + len; |
Neil Booth | 974c43f | 2002-06-13 06:25:28 +0000 | [diff] [blame] | 1141 | macro->flags |= NODE_DISABLED; |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1142 | } |
| 1143 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1144 | /* Expand an argument ARG before replacing parameters in a |
| 1145 | function-like macro. This works by pushing a context with the |
| 1146 | argument's tokens, and then expanding that into a temporary buffer |
| 1147 | as if it were a normal part of the token stream. collect_args() |
| 1148 | has terminated the argument's tokens with a CPP_EOF so that we know |
| 1149 | when we have fully expanded the argument. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1150 | static void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1151 | expand_arg (cpp_reader *pfile, macro_arg *arg) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1152 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1153 | unsigned int capacity; |
Neil Booth | 56941bf | 2002-09-20 19:44:09 +0000 | [diff] [blame] | 1154 | bool saved_warn_trad; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1155 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1156 | if (arg->count == 0) |
| 1157 | return; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1158 | |
Neil Booth | 56941bf | 2002-09-20 19:44:09 +0000 | [diff] [blame] | 1159 | /* Don't warn about funlike macros when pre-expanding. */ |
| 1160 | saved_warn_trad = CPP_WTRADITIONAL (pfile); |
| 1161 | CPP_WTRADITIONAL (pfile) = 0; |
| 1162 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1163 | /* Loop, reading in the arguments. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1164 | capacity = 256; |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1165 | arg->expanded = XNEWVEC (const cpp_token *, capacity); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1166 | |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1167 | push_ptoken_context (pfile, NULL, NULL, arg->first, arg->count + 1); |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1168 | for (;;) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1169 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1170 | const cpp_token *token; |
| 1171 | |
| 1172 | if (arg->expanded_count + 1 >= capacity) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1173 | { |
| 1174 | capacity *= 2; |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1175 | arg->expanded = XRESIZEVEC (const cpp_token *, arg->expanded, |
| 1176 | capacity); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1177 | } |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1178 | |
| 1179 | token = cpp_get_token (pfile); |
| 1180 | |
| 1181 | if (token->type == CPP_EOF) |
| 1182 | break; |
| 1183 | |
| 1184 | arg->expanded[arg->expanded_count++] = token; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1185 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1186 | |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1187 | _cpp_pop_context (pfile); |
Neil Booth | 56941bf | 2002-09-20 19:44:09 +0000 | [diff] [blame] | 1188 | |
| 1189 | CPP_WTRADITIONAL (pfile) = saved_warn_trad; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1190 | } |
| 1191 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1192 | /* Pop the current context off the stack, re-enabling the macro if the |
| 1193 | context represented a macro's replacement list. The context |
| 1194 | structure is not freed so that we can re-use it later. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1195 | void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1196 | _cpp_pop_context (cpp_reader *pfile) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1197 | { |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1198 | cpp_context *context = pfile->context; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1199 | |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1200 | if (context->macro) |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1201 | context->macro->flags &= ~NODE_DISABLED; |
Neil Booth | 1e013d2 | 2001-09-26 21:44:35 +0000 | [diff] [blame] | 1202 | |
| 1203 | if (context->buff) |
| 1204 | _cpp_release_buff (pfile, context->buff); |
| 1205 | |
| 1206 | pfile->context = context->prev; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1207 | } |
| 1208 | |
Martin Schaffner | 48c4721 | 2003-06-25 23:01:10 +0200 | [diff] [blame] | 1209 | /* External routine to get a token. Also used nearly everywhere |
Neil Booth | 7f2f1a6 | 2000-11-14 18:32:06 +0000 | [diff] [blame] | 1210 | internally, except for places where we know we can safely call |
Martin Schaffner | 48c4721 | 2003-06-25 23:01:10 +0200 | [diff] [blame] | 1211 | _cpp_lex_token directly, such as lexing a directive name. |
Neil Booth | 7f2f1a6 | 2000-11-14 18:32:06 +0000 | [diff] [blame] | 1212 | |
| 1213 | Macro expansions and directives are transparently handled, |
| 1214 | including entering included files. Thus tokens are post-macro |
| 1215 | expansion, and after any intervening directives. External callers |
| 1216 | see CPP_EOF only at EOF. Internal callers also see it when meeting |
| 1217 | a directive inside a macro call, when at the end of a directive and |
| 1218 | state.in_directive is still 1, and at the end of argument |
| 1219 | pre-expansion. */ |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1220 | const cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1221 | cpp_get_token (cpp_reader *pfile) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1222 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1223 | const cpp_token *result; |
Tom Tromey | 5ffeb913 | 2007-09-06 16:24:05 +0000 | [diff] [blame] | 1224 | bool can_set = pfile->set_invocation_location; |
| 1225 | pfile->set_invocation_location = false; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1226 | |
Neil Booth | 29b1074 | 2000-11-13 18:40:37 +0000 | [diff] [blame] | 1227 | for (;;) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1228 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1229 | cpp_hashnode *node; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1230 | cpp_context *context = pfile->context; |
| 1231 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1232 | /* Context->prev == 0 <=> base context. */ |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 1233 | if (!context->prev) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1234 | result = _cpp_lex_token (pfile); |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1235 | else if (FIRST (context).token != LAST (context).token) |
Neil Booth | 29b1074 | 2000-11-13 18:40:37 +0000 | [diff] [blame] | 1236 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1237 | if (context->direct_p) |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1238 | result = FIRST (context).token++; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1239 | else |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1240 | result = *FIRST (context).ptoken++; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1241 | |
| 1242 | if (result->flags & PASTE_LEFT) |
Neil Booth | ec1a23e | 2001-01-31 07:48:54 +0000 | [diff] [blame] | 1243 | { |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1244 | paste_all_tokens (pfile, result); |
| 1245 | if (pfile->state.in_directive) |
| 1246 | continue; |
| 1247 | return padding_token (pfile, result); |
Neil Booth | ec1a23e | 2001-01-31 07:48:54 +0000 | [diff] [blame] | 1248 | } |
Neil Booth | 29b1074 | 2000-11-13 18:40:37 +0000 | [diff] [blame] | 1249 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1250 | else |
| 1251 | { |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 1252 | _cpp_pop_context (pfile); |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1253 | if (pfile->state.in_directive) |
| 1254 | continue; |
| 1255 | return &pfile->avoid_paste; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1256 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1257 | |
Jason Thorpe | 477cdac | 2002-04-07 03:12:23 +0000 | [diff] [blame] | 1258 | if (pfile->state.in_directive && result->type == CPP_COMMENT) |
| 1259 | continue; |
| 1260 | |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1261 | if (result->type != CPP_NAME) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1262 | break; |
| 1263 | |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1264 | node = result->val.node.node; |
Neil Booth | 4c2b647 | 2000-11-11 13:19:01 +0000 | [diff] [blame] | 1265 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1266 | if (node->type != NT_MACRO || (result->flags & NO_EXPAND)) |
| 1267 | break; |
Kazu Hirata | df38348 | 2002-05-22 22:02:16 +0000 | [diff] [blame] | 1268 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1269 | if (!(node->flags & NODE_DISABLED)) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1270 | { |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1271 | int ret = 0; |
Tom Tromey | 5ffeb913 | 2007-09-06 16:24:05 +0000 | [diff] [blame] | 1272 | /* If not in a macro context, and we're going to start an |
| 1273 | expansion, record the location. */ |
| 1274 | if (can_set && !context->macro) |
| 1275 | pfile->invocation_location = result->src_loc; |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 1276 | if (pfile->state.prevent_expansion) |
| 1277 | break; |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1278 | |
| 1279 | /* Conditional macros require that a predicate be evaluated |
| 1280 | first. */ |
Jakub Jelinek | a37a7b8 | 2009-03-30 17:00:52 +0200 | [diff] [blame] | 1281 | if ((node->flags & NODE_CONDITIONAL) != 0) |
| 1282 | { |
| 1283 | if (pfile->cb.macro_to_expand) |
| 1284 | { |
| 1285 | bool whitespace_after; |
| 1286 | const cpp_token *peek_tok = cpp_peek_token (pfile, 0); |
| 1287 | |
| 1288 | whitespace_after = (peek_tok->type == CPP_PADDING |
| 1289 | || (peek_tok->flags & PREV_WHITE)); |
| 1290 | node = pfile->cb.macro_to_expand (pfile, result); |
| 1291 | if (node) |
| 1292 | ret = enter_macro_context (pfile, node, result); |
| 1293 | else if (whitespace_after) |
| 1294 | { |
| 1295 | /* If macro_to_expand hook returned NULL and it |
| 1296 | ate some tokens, see if we don't need to add |
| 1297 | a padding token in between this and the |
| 1298 | next token. */ |
| 1299 | peek_tok = cpp_peek_token (pfile, 0); |
| 1300 | if (peek_tok->type != CPP_PADDING |
| 1301 | && (peek_tok->flags & PREV_WHITE) == 0) |
| 1302 | _cpp_push_token_context (pfile, NULL, |
| 1303 | padding_token (pfile, |
| 1304 | peek_tok), 1); |
| 1305 | } |
| 1306 | } |
| 1307 | } |
| 1308 | else |
| 1309 | ret = enter_macro_context (pfile, node, result); |
| 1310 | if (ret) |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1311 | { |
Jakub Jelinek | 765d600 | 2008-01-25 10:01:27 +0100 | [diff] [blame] | 1312 | if (pfile->state.in_directive || ret == 2) |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1313 | continue; |
| 1314 | return padding_token (pfile, result); |
Neil Booth | bd96977 | 2001-02-01 19:13:53 +0000 | [diff] [blame] | 1315 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1316 | } |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1317 | else |
| 1318 | { |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1319 | /* Flag this token as always unexpandable. FIXME: move this |
| 1320 | to collect_args()?. */ |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1321 | cpp_token *t = _cpp_temp_token (pfile); |
| 1322 | t->type = result->type; |
| 1323 | t->flags = result->flags | NO_EXPAND; |
Jakub Jelinek | 7309671 | 2005-03-04 16:33:23 +0100 | [diff] [blame] | 1324 | t->val = result->val; |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1325 | result = t; |
| 1326 | } |
Neil Booth | a5c3ccc | 2000-10-30 22:29:00 +0000 | [diff] [blame] | 1327 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1328 | break; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1329 | } |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1330 | |
| 1331 | return result; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1332 | } |
| 1333 | |
Tom Tromey | 5ffeb913 | 2007-09-06 16:24:05 +0000 | [diff] [blame] | 1334 | /* Like cpp_get_token, but also returns a location separate from the |
| 1335 | one provided by the returned token. LOC is an out parameter; *LOC |
| 1336 | is set to the location "as expected by the user". This matters |
| 1337 | when a token results from macro expansion -- the token's location |
| 1338 | will indicate where the macro is defined, but *LOC will be the |
| 1339 | location of the start of the expansion. */ |
| 1340 | const cpp_token * |
| 1341 | cpp_get_token_with_location (cpp_reader *pfile, source_location *loc) |
| 1342 | { |
| 1343 | const cpp_token *result; |
| 1344 | |
| 1345 | pfile->set_invocation_location = true; |
| 1346 | result = cpp_get_token (pfile); |
| 1347 | if (pfile->context->macro) |
| 1348 | *loc = pfile->invocation_location; |
| 1349 | else |
| 1350 | *loc = result->src_loc; |
| 1351 | |
| 1352 | return result; |
| 1353 | } |
| 1354 | |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1355 | /* Returns true if we're expanding an object-like macro that was |
| 1356 | defined in a system header. Just checks the macro at the top of |
| 1357 | the stack. Used for diagnostic suppression. */ |
| 1358 | int |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1359 | cpp_sys_macro_p (cpp_reader *pfile) |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1360 | { |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1361 | cpp_hashnode *node = pfile->context->macro; |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1362 | |
Neil Booth | 644edda | 2001-10-02 12:57:24 +0000 | [diff] [blame] | 1363 | return node && node->value.macro && node->value.macro->syshdr; |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1364 | } |
| 1365 | |
Neil Booth | af0d16c | 2002-04-22 17:48:02 +0000 | [diff] [blame] | 1366 | /* Read each token in, until end of the current file. Directives are |
| 1367 | transparently processed. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1368 | void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1369 | cpp_scan_nooutput (cpp_reader *pfile) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1370 | { |
Per Bothner | 22234f5 | 2004-02-18 14:02:39 -0800 | [diff] [blame] | 1371 | /* Request a CPP_EOF token at the end of this file, rather than |
| 1372 | transparently continuing with the including file. */ |
| 1373 | pfile->buffer->return_at_eof = true; |
| 1374 | |
Zack Weinberg | c6e8380 | 2004-06-05 20:58:06 +0000 | [diff] [blame] | 1375 | pfile->state.discarding_output++; |
| 1376 | pfile->state.prevent_expansion++; |
| 1377 | |
Neil Booth | 590e198 | 2002-07-01 12:47:54 +0000 | [diff] [blame] | 1378 | if (CPP_OPTION (pfile, traditional)) |
| 1379 | while (_cpp_read_logical_line_trad (pfile)) |
| 1380 | ; |
| 1381 | else |
| 1382 | while (cpp_get_token (pfile)->type != CPP_EOF) |
| 1383 | ; |
Zack Weinberg | c6e8380 | 2004-06-05 20:58:06 +0000 | [diff] [blame] | 1384 | |
| 1385 | pfile->state.discarding_output--; |
| 1386 | pfile->state.prevent_expansion--; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1387 | } |
| 1388 | |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1389 | /* Step back one or more tokens obtained from the lexer. */ |
| 1390 | void |
| 1391 | _cpp_backup_tokens_direct (cpp_reader *pfile, unsigned int count) |
| 1392 | { |
| 1393 | pfile->lookaheads += count; |
| 1394 | while (count--) |
| 1395 | { |
| 1396 | pfile->cur_token--; |
| 1397 | if (pfile->cur_token == pfile->cur_run->base |
| 1398 | /* Possible with -fpreprocessed and no leading #line. */ |
| 1399 | && pfile->cur_run->prev != NULL) |
| 1400 | { |
| 1401 | pfile->cur_run = pfile->cur_run->prev; |
| 1402 | pfile->cur_token = pfile->cur_run->limit; |
| 1403 | } |
| 1404 | } |
| 1405 | } |
| 1406 | |
Jakub Jelinek | 1c90c6f | 2006-06-09 23:13:25 +0200 | [diff] [blame] | 1407 | /* Step back one (or more) tokens. Can only step back more than 1 if |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 1408 | they are from the lexer, and not from macro expansion. */ |
Neil Booth | b528a07 | 2000-11-12 11:46:21 +0000 | [diff] [blame] | 1409 | void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1410 | _cpp_backup_tokens (cpp_reader *pfile, unsigned int count) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1411 | { |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 1412 | if (pfile->context->prev == NULL) |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1413 | _cpp_backup_tokens_direct (pfile, count); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1414 | else |
| 1415 | { |
Neil Booth | bdcbe49 | 2001-09-13 20:05:17 +0000 | [diff] [blame] | 1416 | if (count != 1) |
| 1417 | abort (); |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1418 | if (pfile->context->direct_p) |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1419 | FIRST (pfile->context).token--; |
Neil Booth | 4ed5bcf | 2001-09-24 22:53:12 +0000 | [diff] [blame] | 1420 | else |
Neil Booth | 82eda77 | 2002-06-04 13:07:06 +0000 | [diff] [blame] | 1421 | FIRST (pfile->context).ptoken--; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1422 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1423 | } |
| 1424 | |
| 1425 | /* #define directive parsing and handling. */ |
| 1426 | |
Kazu Hirata | da7d830 | 2002-09-22 02:03:17 +0000 | [diff] [blame] | 1427 | /* Returns nonzero if a macro redefinition warning is required. */ |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1428 | static bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1429 | warn_of_redefinition (cpp_reader *pfile, const cpp_hashnode *node, |
| 1430 | const cpp_macro *macro2) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1431 | { |
| 1432 | const cpp_macro *macro1; |
| 1433 | unsigned int i; |
| 1434 | |
Neil Booth | 618cdda | 2001-02-25 09:43:03 +0000 | [diff] [blame] | 1435 | /* Some redefinitions need to be warned about regardless. */ |
| 1436 | if (node->flags & NODE_WARN) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1437 | return true; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1438 | |
Simon Baldwin | c047ce9 | 2008-09-18 15:39:08 +0000 | [diff] [blame] | 1439 | /* Suppress warnings for builtins that lack the NODE_WARN flag. */ |
| 1440 | if (node->flags & NODE_BUILTIN) |
| 1441 | return false; |
| 1442 | |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1443 | /* Redefinitions of conditional (context-sensitive) macros, on |
| 1444 | the other hand, must be allowed silently. */ |
| 1445 | if (node->flags & NODE_CONDITIONAL) |
| 1446 | return false; |
| 1447 | |
Neil Booth | 618cdda | 2001-02-25 09:43:03 +0000 | [diff] [blame] | 1448 | /* Redefinition of a macro is allowed if and only if the old and new |
Kazu Hirata | ec5c56d | 2001-08-01 17:57:27 +0000 | [diff] [blame] | 1449 | definitions are the same. (6.10.3 paragraph 2). */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1450 | macro1 = node->value.macro; |
| 1451 | |
Neil Booth | 6618c5d | 2002-06-10 06:03:13 +0000 | [diff] [blame] | 1452 | /* Don't check count here as it can be different in valid |
| 1453 | traditional redefinitions with just whitespace differences. */ |
| 1454 | if (macro1->paramc != macro2->paramc |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1455 | || macro1->fun_like != macro2->fun_like |
Neil Booth | 28e0f04 | 2000-12-09 12:06:37 +0000 | [diff] [blame] | 1456 | || macro1->variadic != macro2->variadic) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1457 | return true; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1458 | |
| 1459 | /* Check parameter spellings. */ |
| 1460 | for (i = 0; i < macro1->paramc; i++) |
| 1461 | if (macro1->params[i] != macro2->params[i]) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1462 | return true; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1463 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1464 | /* Check the replacement text or tokens. */ |
| 1465 | if (CPP_OPTION (pfile, traditional)) |
Neil Booth | 6618c5d | 2002-06-10 06:03:13 +0000 | [diff] [blame] | 1466 | return _cpp_expansions_different_trad (macro1, macro2); |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1467 | |
DJ Delorie | a7f36da | 2003-06-01 14:55:15 -0400 | [diff] [blame] | 1468 | if (macro1->count != macro2->count) |
| 1469 | return true; |
| 1470 | |
| 1471 | for (i = 0; i < macro1->count; i++) |
| 1472 | if (!_cpp_equiv_tokens (¯o1->exp.tokens[i], ¯o2->exp.tokens[i])) |
| 1473 | return true; |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1474 | |
| 1475 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1476 | } |
| 1477 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1478 | /* Free the definition of hashnode H. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1479 | void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1480 | _cpp_free_definition (cpp_hashnode *h) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1481 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1482 | /* Macros and assertions no longer have anything to free. */ |
| 1483 | h->type = NT_VOID; |
| 1484 | /* Clear builtin flag in case of redefinition. */ |
Joseph Myers | 93d45d9 | 2008-04-02 20:42:53 +0100 | [diff] [blame] | 1485 | h->flags &= ~(NODE_BUILTIN | NODE_DISABLED | NODE_USED); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1486 | } |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1487 | |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1488 | /* Save parameter NODE to the parameter list of macro MACRO. Returns |
Kazu Hirata | da7d830 | 2002-09-22 02:03:17 +0000 | [diff] [blame] | 1489 | zero on success, nonzero if the parameter is a duplicate. */ |
Neil Booth | c70f6ed | 2002-06-07 06:26:32 +0000 | [diff] [blame] | 1490 | bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1491 | _cpp_save_parameter (cpp_reader *pfile, cpp_macro *macro, cpp_hashnode *node) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1492 | { |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1493 | unsigned int len; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1494 | /* Constraint 6.10.3.6 - duplicate parameter names. */ |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1495 | if (node->flags & NODE_MACRO_ARG) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1496 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1497 | cpp_error (pfile, CPP_DL_ERROR, "duplicate macro parameter \"%s\"", |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1498 | NODE_NAME (node)); |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1499 | return true; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1500 | } |
| 1501 | |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1502 | if (BUFF_ROOM (pfile->a_buff) |
| 1503 | < (macro->paramc + 1) * sizeof (cpp_hashnode *)) |
| 1504 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_hashnode *)); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1505 | |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1506 | ((cpp_hashnode **) BUFF_FRONT (pfile->a_buff))[macro->paramc++] = node; |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1507 | node->flags |= NODE_MACRO_ARG; |
| 1508 | len = macro->paramc * sizeof (union _cpp_hashnode_value); |
| 1509 | if (len > pfile->macro_buffer_len) |
| 1510 | { |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1511 | pfile->macro_buffer = XRESIZEVEC (unsigned char, pfile->macro_buffer, |
| 1512 | len); |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1513 | pfile->macro_buffer_len = len; |
| 1514 | } |
| 1515 | ((union _cpp_hashnode_value *) pfile->macro_buffer)[macro->paramc - 1] |
| 1516 | = node->value; |
| 1517 | |
| 1518 | node->value.arg_index = macro->paramc; |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1519 | return false; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1520 | } |
| 1521 | |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1522 | /* Check the syntax of the parameters in a MACRO definition. Returns |
| 1523 | false if an error occurs. */ |
| 1524 | static bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1525 | parse_params (cpp_reader *pfile, cpp_macro *macro) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1526 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1527 | unsigned int prev_ident = 0; |
| 1528 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1529 | for (;;) |
| 1530 | { |
Neil Booth | 345894b | 2001-09-16 13:44:29 +0000 | [diff] [blame] | 1531 | const cpp_token *token = _cpp_lex_token (pfile); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1532 | |
Neil Booth | 345894b | 2001-09-16 13:44:29 +0000 | [diff] [blame] | 1533 | switch (token->type) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1534 | { |
| 1535 | default: |
Jason Thorpe | 477cdac | 2002-04-07 03:12:23 +0000 | [diff] [blame] | 1536 | /* Allow/ignore comments in parameter lists if we are |
| 1537 | preserving comments in macro expansions. */ |
| 1538 | if (token->type == CPP_COMMENT |
| 1539 | && ! CPP_OPTION (pfile, discard_comments_in_macro_exp)) |
| 1540 | continue; |
| 1541 | |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1542 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1543 | "\"%s\" may not appear in macro parameter list", |
Neil Booth | 345894b | 2001-09-16 13:44:29 +0000 | [diff] [blame] | 1544 | cpp_token_as_text (pfile, token)); |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1545 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1546 | |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1547 | case CPP_NAME: |
| 1548 | if (prev_ident) |
| 1549 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1550 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1551 | "macro parameters must be comma-separated"); |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1552 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1553 | } |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1554 | prev_ident = 1; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1555 | |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1556 | if (_cpp_save_parameter (pfile, macro, token->val.node.node)) |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1557 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1558 | continue; |
| 1559 | |
| 1560 | case CPP_CLOSE_PAREN: |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1561 | if (prev_ident || macro->paramc == 0) |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1562 | return true; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1563 | |
| 1564 | /* Fall through to pick up the error. */ |
| 1565 | case CPP_COMMA: |
| 1566 | if (!prev_ident) |
| 1567 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1568 | cpp_error (pfile, CPP_DL_ERROR, "parameter name missing"); |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1569 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1570 | } |
| 1571 | prev_ident = 0; |
| 1572 | continue; |
| 1573 | |
| 1574 | case CPP_ELLIPSIS: |
Neil Booth | 28e0f04 | 2000-12-09 12:06:37 +0000 | [diff] [blame] | 1575 | macro->variadic = 1; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1576 | if (!prev_ident) |
| 1577 | { |
Neil Booth | c70f6ed | 2002-06-07 06:26:32 +0000 | [diff] [blame] | 1578 | _cpp_save_parameter (pfile, macro, |
| 1579 | pfile->spec_nodes.n__VA_ARGS__); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1580 | pfile->state.va_args_ok = 1; |
Richard Henderson | e5b7921 | 2004-02-19 14:18:50 -0800 | [diff] [blame] | 1581 | if (! CPP_OPTION (pfile, c99) |
| 1582 | && CPP_OPTION (pfile, pedantic) |
| 1583 | && CPP_OPTION (pfile, warn_variadic_macros)) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1584 | cpp_error (pfile, CPP_DL_PEDWARN, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1585 | "anonymous variadic macros were introduced in C99"); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1586 | } |
Richard Henderson | e5b7921 | 2004-02-19 14:18:50 -0800 | [diff] [blame] | 1587 | else if (CPP_OPTION (pfile, pedantic) |
| 1588 | && CPP_OPTION (pfile, warn_variadic_macros)) |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1589 | cpp_error (pfile, CPP_DL_PEDWARN, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1590 | "ISO C does not permit named variadic macros"); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1591 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1592 | /* We're at the end, and just expect a closing parenthesis. */ |
Neil Booth | 345894b | 2001-09-16 13:44:29 +0000 | [diff] [blame] | 1593 | token = _cpp_lex_token (pfile); |
| 1594 | if (token->type == CPP_CLOSE_PAREN) |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1595 | return true; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1596 | /* Fall through. */ |
| 1597 | |
| 1598 | case CPP_EOF: |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1599 | cpp_error (pfile, CPP_DL_ERROR, "missing ')' in macro parameter list"); |
Neil Booth | 23ff022 | 2002-07-17 17:27:14 +0000 | [diff] [blame] | 1600 | return false; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1601 | } |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1602 | } |
| 1603 | } |
| 1604 | |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1605 | /* Allocate room for a token from a macro's replacement list. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1606 | static cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1607 | alloc_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1608 | { |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1609 | if (BUFF_ROOM (pfile->a_buff) < (macro->count + 1) * sizeof (cpp_token)) |
| 1610 | _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_token)); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1611 | |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1612 | return &((cpp_token *) BUFF_FRONT (pfile->a_buff))[macro->count++]; |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1613 | } |
| 1614 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1615 | /* Lex a token from the expansion of MACRO, but mark parameters as we |
| 1616 | find them and warn of traditional stringification. */ |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1617 | static cpp_token * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1618 | lex_expansion_token (cpp_reader *pfile, cpp_macro *macro) |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1619 | { |
Tom Tromey | ee38036 | 2007-01-30 15:46:01 +0000 | [diff] [blame] | 1620 | cpp_token *token, *saved_cur_token; |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1621 | |
Tom Tromey | ee38036 | 2007-01-30 15:46:01 +0000 | [diff] [blame] | 1622 | saved_cur_token = pfile->cur_token; |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1623 | pfile->cur_token = alloc_expansion_token (pfile, macro); |
| 1624 | token = _cpp_lex_direct (pfile); |
Tom Tromey | ee38036 | 2007-01-30 15:46:01 +0000 | [diff] [blame] | 1625 | pfile->cur_token = saved_cur_token; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1626 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1627 | /* Is this a parameter? */ |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1628 | if (token->type == CPP_NAME |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1629 | && (token->val.node.node->flags & NODE_MACRO_ARG) != 0) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1630 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1631 | token->type = CPP_MACRO_ARG; |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1632 | token->val.macro_arg.arg_no = token->val.node.node->value.arg_index; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1633 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1634 | else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0 |
| 1635 | && (token->type == CPP_STRING || token->type == CPP_CHAR)) |
| 1636 | check_trad_stringification (pfile, macro, &token->val.str); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1637 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1638 | return token; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1639 | } |
| 1640 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1641 | static bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1642 | create_iso_definition (cpp_reader *pfile, cpp_macro *macro) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1643 | { |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1644 | cpp_token *token; |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1645 | const cpp_token *ctoken; |
Simon Martin | 126e073 | 2007-05-23 20:58:34 +0000 | [diff] [blame] | 1646 | bool following_paste_op = false; |
| 1647 | const char *paste_op_error_msg = |
| 1648 | N_("'##' cannot appear at either end of a macro expansion"); |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1649 | unsigned int num_extra_tokens = 0; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1650 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1651 | /* Get the first token of the expansion (or the '(' of a |
| 1652 | function-like macro). */ |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1653 | ctoken = _cpp_lex_token (pfile); |
| 1654 | |
| 1655 | if (ctoken->type == CPP_OPEN_PAREN && !(ctoken->flags & PREV_WHITE)) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1656 | { |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1657 | bool ok = parse_params (pfile, macro); |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1658 | macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff); |
| 1659 | if (!ok) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1660 | return false; |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1661 | |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1662 | /* Success. Commit or allocate the parameter array. */ |
| 1663 | if (pfile->hash_table->alloc_subobject) |
| 1664 | { |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1665 | cpp_hashnode **params = |
| 1666 | (cpp_hashnode **) pfile->hash_table->alloc_subobject |
| 1667 | (sizeof (cpp_hashnode *) * macro->paramc); |
Paolo Bonzini | be0f1e5 | 2005-02-14 08:52:24 +0000 | [diff] [blame] | 1668 | memcpy (params, macro->params, |
| 1669 | sizeof (cpp_hashnode *) * macro->paramc); |
| 1670 | macro->params = params; |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1671 | } |
| 1672 | else |
| 1673 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->params[macro->paramc]; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1674 | macro->fun_like = 1; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1675 | } |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1676 | else if (ctoken->type != CPP_EOF && !(ctoken->flags & PREV_WHITE)) |
Jakub Jelinek | cae064e | 2005-04-05 22:07:06 +0200 | [diff] [blame] | 1677 | { |
| 1678 | /* While ISO C99 requires whitespace before replacement text |
| 1679 | in a macro definition, ISO C90 with TC1 allows there characters |
| 1680 | from the basic source character set. */ |
| 1681 | if (CPP_OPTION (pfile, c99)) |
| 1682 | cpp_error (pfile, CPP_DL_PEDWARN, |
| 1683 | "ISO C99 requires whitespace after the macro name"); |
| 1684 | else |
| 1685 | { |
| 1686 | int warntype = CPP_DL_WARNING; |
| 1687 | switch (ctoken->type) |
| 1688 | { |
| 1689 | case CPP_ATSIGN: |
| 1690 | case CPP_AT_NAME: |
| 1691 | case CPP_OBJC_STRING: |
| 1692 | /* '@' is not in basic character set. */ |
| 1693 | warntype = CPP_DL_PEDWARN; |
| 1694 | break; |
| 1695 | case CPP_OTHER: |
| 1696 | /* Basic character set sans letters, digits and _. */ |
| 1697 | if (strchr ("!\"#%&'()*+,-./:;<=>?[\\]^{|}~", |
| 1698 | ctoken->val.str.text[0]) == NULL) |
| 1699 | warntype = CPP_DL_PEDWARN; |
| 1700 | break; |
| 1701 | default: |
| 1702 | /* All other tokens start with a character from basic |
| 1703 | character set. */ |
| 1704 | break; |
| 1705 | } |
| 1706 | cpp_error (pfile, warntype, |
| 1707 | "missing whitespace after the macro name"); |
| 1708 | } |
| 1709 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1710 | |
Neil Booth | 14baae0 | 2001-09-17 18:26:12 +0000 | [diff] [blame] | 1711 | if (macro->fun_like) |
| 1712 | token = lex_expansion_token (pfile, macro); |
| 1713 | else |
| 1714 | { |
| 1715 | token = alloc_expansion_token (pfile, macro); |
| 1716 | *token = *ctoken; |
| 1717 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1718 | |
| 1719 | for (;;) |
| 1720 | { |
| 1721 | /* Check the stringifying # constraint 6.10.3.2.1 of |
| 1722 | function-like macros when lexing the subsequent token. */ |
| 1723 | if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like) |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1724 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1725 | if (token->type == CPP_MACRO_ARG) |
| 1726 | { |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1727 | if (token->flags & PREV_WHITE) |
| 1728 | token->flags |= SP_PREV_WHITE; |
| 1729 | if (token[-1].flags & DIGRAPH) |
| 1730 | token->flags |= SP_DIGRAPH; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1731 | token->flags &= ~PREV_WHITE; |
| 1732 | token->flags |= STRINGIFY_ARG; |
| 1733 | token->flags |= token[-1].flags & PREV_WHITE; |
| 1734 | token[-1] = token[0]; |
| 1735 | macro->count--; |
| 1736 | } |
| 1737 | /* Let assembler get away with murder. */ |
Neil Booth | bdb05a7 | 2000-11-26 17:31:13 +0000 | [diff] [blame] | 1738 | else if (CPP_OPTION (pfile, lang) != CLK_ASM) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1739 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1740 | cpp_error (pfile, CPP_DL_ERROR, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1741 | "'#' is not followed by a macro parameter"); |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1742 | return false; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1743 | } |
| 1744 | } |
| 1745 | |
| 1746 | if (token->type == CPP_EOF) |
Simon Martin | 126e073 | 2007-05-23 20:58:34 +0000 | [diff] [blame] | 1747 | { |
| 1748 | /* Paste operator constraint 6.10.3.3.1: |
| 1749 | Token-paste ##, can appear in both object-like and |
| 1750 | function-like macros, but not at the end. */ |
| 1751 | if (following_paste_op) |
| 1752 | { |
| 1753 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); |
| 1754 | return false; |
| 1755 | } |
| 1756 | break; |
| 1757 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1758 | |
| 1759 | /* Paste operator constraint 6.10.3.3.1. */ |
| 1760 | if (token->type == CPP_PASTE) |
| 1761 | { |
| 1762 | /* Token-paste ##, can appear in both object-like and |
Simon Martin | 126e073 | 2007-05-23 20:58:34 +0000 | [diff] [blame] | 1763 | function-like macros, but not at the beginning. */ |
| 1764 | if (macro->count == 1) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1765 | { |
Simon Martin | 126e073 | 2007-05-23 20:58:34 +0000 | [diff] [blame] | 1766 | cpp_error (pfile, CPP_DL_ERROR, paste_op_error_msg); |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1767 | return false; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1768 | } |
| 1769 | |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1770 | if (token[-1].flags & PASTE_LEFT) |
| 1771 | { |
| 1772 | macro->extra_tokens = 1; |
| 1773 | num_extra_tokens++; |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 1774 | token->val.token_no = macro->count - 1; |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1775 | } |
| 1776 | else |
| 1777 | { |
| 1778 | --macro->count; |
| 1779 | token[-1].flags |= PASTE_LEFT; |
| 1780 | if (token->flags & DIGRAPH) |
| 1781 | token[-1].flags |= SP_DIGRAPH; |
| 1782 | if (token->flags & PREV_WHITE) |
| 1783 | token[-1].flags |= SP_PREV_WHITE; |
| 1784 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1785 | } |
| 1786 | |
Simon Martin | 126e073 | 2007-05-23 20:58:34 +0000 | [diff] [blame] | 1787 | following_paste_op = (token->type == CPP_PASTE); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1788 | token = lex_expansion_token (pfile, macro); |
| 1789 | } |
| 1790 | |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 1791 | macro->exp.tokens = (cpp_token *) BUFF_FRONT (pfile->a_buff); |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1792 | macro->traditional = 0; |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1793 | |
Neil Booth | 4c2b647 | 2000-11-11 13:19:01 +0000 | [diff] [blame] | 1794 | /* Don't count the CPP_EOF. */ |
| 1795 | macro->count--; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1796 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1797 | /* Clear whitespace on first token for warn_of_redefinition(). */ |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1798 | if (macro->count) |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 1799 | macro->exp.tokens[0].flags &= ~PREV_WHITE; |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1800 | |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1801 | /* Commit or allocate the memory. */ |
| 1802 | if (pfile->hash_table->alloc_subobject) |
| 1803 | { |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1804 | cpp_token *tokns = |
| 1805 | (cpp_token *) pfile->hash_table->alloc_subobject (sizeof (cpp_token) |
| 1806 | * macro->count); |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1807 | if (num_extra_tokens) |
| 1808 | { |
| 1809 | /* Place second and subsequent ## or %:%: tokens in |
| 1810 | sequences of consecutive such tokens at the end of the |
| 1811 | list to preserve information about where they appear, how |
| 1812 | they are spelt and whether they are preceded by |
| 1813 | whitespace without otherwise interfering with macro |
| 1814 | expansion. */ |
| 1815 | cpp_token *normal_dest = tokns; |
| 1816 | cpp_token *extra_dest = tokns + macro->count - num_extra_tokens; |
| 1817 | unsigned int i; |
| 1818 | for (i = 0; i < macro->count; i++) |
| 1819 | { |
| 1820 | if (macro->exp.tokens[i].type == CPP_PASTE) |
| 1821 | *extra_dest++ = macro->exp.tokens[i]; |
| 1822 | else |
| 1823 | *normal_dest++ = macro->exp.tokens[i]; |
| 1824 | } |
| 1825 | } |
| 1826 | else |
| 1827 | memcpy (tokns, macro->exp.tokens, sizeof (cpp_token) * macro->count); |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1828 | macro->exp.tokens = tokns; |
| 1829 | } |
| 1830 | else |
| 1831 | BUFF_FRONT (pfile->a_buff) = (uchar *) ¯o->exp.tokens[macro->count]; |
Neil Booth | 8c3b269 | 2001-09-30 10:03:11 +0000 | [diff] [blame] | 1832 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1833 | return true; |
| 1834 | } |
Neil Booth | 44ed91a | 2000-10-29 11:37:18 +0000 | [diff] [blame] | 1835 | |
Kazu Hirata | da7d830 | 2002-09-22 02:03:17 +0000 | [diff] [blame] | 1836 | /* Parse a macro and save its expansion. Returns nonzero on success. */ |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1837 | bool |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1838 | _cpp_create_definition (cpp_reader *pfile, cpp_hashnode *node) |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1839 | { |
| 1840 | cpp_macro *macro; |
| 1841 | unsigned int i; |
| 1842 | bool ok; |
| 1843 | |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1844 | if (pfile->hash_table->alloc_subobject) |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 1845 | macro = (cpp_macro *) pfile->hash_table->alloc_subobject |
| 1846 | (sizeof (cpp_macro)); |
Geoffrey Keating | d804416 | 2004-06-09 20:10:13 +0000 | [diff] [blame] | 1847 | else |
| 1848 | macro = (cpp_macro *) _cpp_aligned_alloc (pfile, sizeof (cpp_macro)); |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1849 | macro->line = pfile->directive_line; |
| 1850 | macro->params = 0; |
| 1851 | macro->paramc = 0; |
| 1852 | macro->variadic = 0; |
Neil Booth | 23345bb | 2003-03-14 21:47:50 +0000 | [diff] [blame] | 1853 | macro->used = !CPP_OPTION (pfile, warn_unused_macros); |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1854 | macro->count = 0; |
| 1855 | macro->fun_like = 0; |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 1856 | macro->extra_tokens = 0; |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1857 | /* To suppress some diagnostics. */ |
Per Bothner | 12f9df4 | 2004-02-11 07:29:30 -0800 | [diff] [blame] | 1858 | macro->syshdr = pfile->buffer && pfile->buffer->sysp != 0; |
Neil Booth | 7065e13 | 2001-02-14 07:38:20 +0000 | [diff] [blame] | 1859 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1860 | if (CPP_OPTION (pfile, traditional)) |
| 1861 | ok = _cpp_create_trad_definition (pfile, macro); |
| 1862 | else |
| 1863 | { |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1864 | ok = create_iso_definition (pfile, macro); |
| 1865 | |
Tom Tromey | ee38036 | 2007-01-30 15:46:01 +0000 | [diff] [blame] | 1866 | /* We set the type for SEEN_EOL() in directives.c. |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1867 | |
| 1868 | Longer term we should lex the whole line before coming here, |
| 1869 | and just copy the expansion. */ |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1870 | |
| 1871 | /* Stop the lexer accepting __VA_ARGS__. */ |
| 1872 | pfile->state.va_args_ok = 0; |
| 1873 | } |
| 1874 | |
| 1875 | /* Clear the fast argument lookup indices. */ |
| 1876 | for (i = macro->paramc; i-- > 0; ) |
Zack Weinberg | 4977bab | 2002-12-16 18:23:00 +0000 | [diff] [blame] | 1877 | { |
| 1878 | struct cpp_hashnode *node = macro->params[i]; |
| 1879 | node->flags &= ~ NODE_MACRO_ARG; |
| 1880 | node->value = ((union _cpp_hashnode_value *) pfile->macro_buffer)[i]; |
| 1881 | } |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1882 | |
| 1883 | if (!ok) |
| 1884 | return ok; |
| 1885 | |
Neil Booth | c2734e0 | 2002-07-26 16:29:31 +0000 | [diff] [blame] | 1886 | if (node->type == NT_MACRO) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1887 | { |
Neil Booth | a69cbaa | 2002-07-23 22:57:49 +0000 | [diff] [blame] | 1888 | if (CPP_OPTION (pfile, warn_unused_macros)) |
| 1889 | _cpp_warn_if_unused_macro (pfile, node, NULL); |
| 1890 | |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1891 | if (warn_of_redefinition (pfile, node, macro)) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1892 | { |
Joseph Myers | 148e421 | 2009-03-29 23:56:07 +0100 | [diff] [blame] | 1893 | bool warned; |
| 1894 | warned = cpp_error_with_line (pfile, CPP_DL_PEDWARN, |
| 1895 | pfile->directive_line, 0, |
| 1896 | "\"%s\" redefined", NODE_NAME (node)); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1897 | |
Joseph Myers | 148e421 | 2009-03-29 23:56:07 +0100 | [diff] [blame] | 1898 | if (warned && node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) |
| 1899 | cpp_error_with_line (pfile, CPP_DL_NOTE, |
Neil Booth | cbc69f8 | 2002-06-05 20:27:12 +0000 | [diff] [blame] | 1900 | node->value.macro->line, 0, |
| 1901 | "this is the location of the previous definition"); |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1902 | } |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1903 | } |
| 1904 | |
Neil Booth | c2734e0 | 2002-07-26 16:29:31 +0000 | [diff] [blame] | 1905 | if (node->type != NT_VOID) |
| 1906 | _cpp_free_definition (node); |
| 1907 | |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1908 | /* Enter definition in hash table. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1909 | node->type = NT_MACRO; |
| 1910 | node->value.macro = macro; |
Tom Tromey | 607f74e | 2007-11-30 18:24:01 +0000 | [diff] [blame] | 1911 | if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_")) |
Tom Tromey | ec46053 | 2008-01-22 21:43:49 +0000 | [diff] [blame] | 1912 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_FORMAT_MACROS") |
| 1913 | /* __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS are mentioned |
| 1914 | in the C standard, as something that one must use in C++. |
| 1915 | However DR#593 indicates that these aren't actually mentioned |
| 1916 | in the C++ standard. We special-case them anyway. */ |
| 1917 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_LIMIT_MACROS") |
| 1918 | && ustrcmp (NODE_NAME (node), (const uchar *) "__STDC_CONSTANT_MACROS")) |
Neil Booth | 618cdda | 2001-02-25 09:43:03 +0000 | [diff] [blame] | 1919 | node->flags |= NODE_WARN; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1920 | |
Ben Elliston | 5950c3c | 2008-07-14 05:09:48 +0000 | [diff] [blame] | 1921 | /* If user defines one of the conditional macros, remove the |
| 1922 | conditional flag */ |
| 1923 | node->flags &= ~NODE_CONDITIONAL; |
| 1924 | |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1925 | return ok; |
Zack Weinberg | 711b882 | 2000-07-18 00:59:49 +0000 | [diff] [blame] | 1926 | } |
| 1927 | |
Neil Booth | d15a58c | 2002-01-03 18:32:55 +0000 | [diff] [blame] | 1928 | /* Warn if a token in STRING matches one of a function-like MACRO's |
| 1929 | parameters. */ |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1930 | static void |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1931 | check_trad_stringification (cpp_reader *pfile, const cpp_macro *macro, |
| 1932 | const cpp_string *string) |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1933 | { |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1934 | unsigned int i, len; |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 1935 | const uchar *p, *q, *limit; |
Kazu Hirata | df38348 | 2002-05-22 22:02:16 +0000 | [diff] [blame] | 1936 | |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1937 | /* Loop over the string. */ |
Neil Booth | 6338b35 | 2003-04-23 22:44:06 +0000 | [diff] [blame] | 1938 | limit = string->text + string->len - 1; |
| 1939 | for (p = string->text + 1; p < limit; p = q) |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1940 | { |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1941 | /* Find the start of an identifier. */ |
Greg McGary | 61c16b1 | 2000-09-15 21:25:02 +0000 | [diff] [blame] | 1942 | while (p < limit && !is_idstart (*p)) |
| 1943 | p++; |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1944 | |
| 1945 | /* Find the end of the identifier. */ |
| 1946 | q = p; |
Greg McGary | 61c16b1 | 2000-09-15 21:25:02 +0000 | [diff] [blame] | 1947 | while (q < limit && is_idchar (*q)) |
| 1948 | q++; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1949 | |
| 1950 | len = q - p; |
| 1951 | |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1952 | /* Loop over the function macro arguments to see if the |
| 1953 | identifier inside the string matches one of them. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1954 | for (i = 0; i < macro->paramc; i++) |
| 1955 | { |
| 1956 | const cpp_hashnode *node = macro->params[i]; |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1957 | |
Neil Booth | 2a967f3 | 2001-05-20 06:26:45 +0000 | [diff] [blame] | 1958 | if (NODE_LEN (node) == len |
| 1959 | && !memcmp (p, NODE_NAME (node), len)) |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1960 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1961 | cpp_error (pfile, CPP_DL_WARNING, |
Zack Weinberg | f458d1d | 2002-02-27 18:48:07 +0000 | [diff] [blame] | 1962 | "macro argument \"%s\" would be stringified in traditional C", |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1963 | NODE_NAME (node)); |
Kaveh R. Ghazi | e1aa514 | 2000-09-10 03:41:50 +0000 | [diff] [blame] | 1964 | break; |
| 1965 | } |
| 1966 | } |
| 1967 | } |
| 1968 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1969 | |
Neil Booth | 7096171 | 2001-06-23 11:34:41 +0000 | [diff] [blame] | 1970 | /* Returns the name, arguments and expansion of a macro, in a format |
| 1971 | suitable to be read back in again, and therefore also for DWARF 2 |
| 1972 | debugging info. e.g. "PASTE(X, Y) X ## Y", or "MACNAME EXPANSION". |
| 1973 | Caller is expected to generate the "#define" bit if needed. The |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1974 | returned text is temporary, and automatically freed later. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1975 | const unsigned char * |
Zack Weinberg | 6cf87ca | 2003-06-17 06:17:44 +0000 | [diff] [blame] | 1976 | cpp_macro_definition (cpp_reader *pfile, const cpp_hashnode *node) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1977 | { |
| 1978 | unsigned int i, len; |
| 1979 | const cpp_macro *macro = node->value.macro; |
| 1980 | unsigned char *buffer; |
| 1981 | |
| 1982 | if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN)) |
| 1983 | { |
John David Anglin | 0527bc4 | 2003-11-01 22:56:54 +0000 | [diff] [blame] | 1984 | cpp_error (pfile, CPP_DL_ICE, |
Neil Booth | ebef4e8 | 2002-04-14 18:42:47 +0000 | [diff] [blame] | 1985 | "invalid hash type %d in cpp_macro_definition", node->type); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1986 | return 0; |
| 1987 | } |
| 1988 | |
| 1989 | /* Calculate length. */ |
Neil Booth | 8dc901d | 2002-05-29 19:30:07 +0000 | [diff] [blame] | 1990 | len = NODE_LEN (node) + 2; /* ' ' and NUL. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1991 | if (macro->fun_like) |
| 1992 | { |
Jim Blandy | 64d0826 | 2002-04-05 00:12:40 +0000 | [diff] [blame] | 1993 | len += 4; /* "()" plus possible final ".." of named |
| 1994 | varargs (we have + 1 below). */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1995 | for (i = 0; i < macro->paramc; i++) |
Jim Blandy | 64d0826 | 2002-04-05 00:12:40 +0000 | [diff] [blame] | 1996 | len += NODE_LEN (macro->params[i]) + 1; /* "," */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 1997 | } |
| 1998 | |
Eric Christopher | 6da55c0 | 2005-02-15 23:18:04 +0000 | [diff] [blame] | 1999 | /* This should match below where we fill in the buffer. */ |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2000 | if (CPP_OPTION (pfile, traditional)) |
| 2001 | len += _cpp_replacement_text_len (macro); |
| 2002 | else |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2003 | { |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 2004 | unsigned int count = macro_real_token_count (macro); |
| 2005 | for (i = 0; i < count; i++) |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2006 | { |
| 2007 | cpp_token *token = ¯o->exp.tokens[i]; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2008 | |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2009 | if (token->type == CPP_MACRO_ARG) |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 2010 | len += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2011 | else |
Eric Christopher | 6da55c0 | 2005-02-15 23:18:04 +0000 | [diff] [blame] | 2012 | len += cpp_token_len (token); |
| 2013 | |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2014 | if (token->flags & STRINGIFY_ARG) |
| 2015 | len++; /* "#" */ |
| 2016 | if (token->flags & PASTE_LEFT) |
| 2017 | len += 3; /* " ##" */ |
Eric Christopher | 6da55c0 | 2005-02-15 23:18:04 +0000 | [diff] [blame] | 2018 | if (token->flags & PREV_WHITE) |
| 2019 | len++; /* " " */ |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2020 | } |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2021 | } |
| 2022 | |
| 2023 | if (len > pfile->macro_buffer_len) |
Alexandre Oliva | 4b49c36 | 2001-01-09 09:30:43 +0000 | [diff] [blame] | 2024 | { |
Gabriel Dos Reis | c3f829c | 2005-05-28 15:52:48 +0000 | [diff] [blame] | 2025 | pfile->macro_buffer = XRESIZEVEC (unsigned char, |
| 2026 | pfile->macro_buffer, len); |
Alexandre Oliva | 4b49c36 | 2001-01-09 09:30:43 +0000 | [diff] [blame] | 2027 | pfile->macro_buffer_len = len; |
| 2028 | } |
Neil Booth | 7096171 | 2001-06-23 11:34:41 +0000 | [diff] [blame] | 2029 | |
| 2030 | /* Fill in the buffer. Start with the macro name. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2031 | buffer = pfile->macro_buffer; |
Neil Booth | 7096171 | 2001-06-23 11:34:41 +0000 | [diff] [blame] | 2032 | memcpy (buffer, NODE_NAME (node), NODE_LEN (node)); |
| 2033 | buffer += NODE_LEN (node); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2034 | |
| 2035 | /* Parameter names. */ |
| 2036 | if (macro->fun_like) |
| 2037 | { |
| 2038 | *buffer++ = '('; |
| 2039 | for (i = 0; i < macro->paramc; i++) |
| 2040 | { |
| 2041 | cpp_hashnode *param = macro->params[i]; |
| 2042 | |
| 2043 | if (param != pfile->spec_nodes.n__VA_ARGS__) |
| 2044 | { |
Neil Booth | a28c5035 | 2001-05-16 22:02:09 +0000 | [diff] [blame] | 2045 | memcpy (buffer, NODE_NAME (param), NODE_LEN (param)); |
| 2046 | buffer += NODE_LEN (param); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2047 | } |
| 2048 | |
| 2049 | if (i + 1 < macro->paramc) |
Kazu Hirata | df38348 | 2002-05-22 22:02:16 +0000 | [diff] [blame] | 2050 | /* Don't emit a space after the comma here; we're trying |
| 2051 | to emit a Dwarf-friendly definition, and the Dwarf spec |
| 2052 | forbids spaces in the argument list. */ |
Jim Blandy | 64d0826 | 2002-04-05 00:12:40 +0000 | [diff] [blame] | 2053 | *buffer++ = ','; |
Neil Booth | 28e0f04 | 2000-12-09 12:06:37 +0000 | [diff] [blame] | 2054 | else if (macro->variadic) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2055 | *buffer++ = '.', *buffer++ = '.', *buffer++ = '.'; |
| 2056 | } |
| 2057 | *buffer++ = ')'; |
| 2058 | } |
| 2059 | |
Jim Blandy | e37b38d | 2002-03-19 21:43:39 +0000 | [diff] [blame] | 2060 | /* The Dwarf spec requires a space after the macro name, even if the |
| 2061 | definition is the empty string. */ |
| 2062 | *buffer++ = ' '; |
| 2063 | |
Neil Booth | 278c466 | 2002-06-19 05:40:08 +0000 | [diff] [blame] | 2064 | if (CPP_OPTION (pfile, traditional)) |
| 2065 | buffer = _cpp_copy_replacement_text (macro, buffer); |
| 2066 | else if (macro->count) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2067 | /* Expansion tokens. */ |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2068 | { |
Joseph Myers | aa50850 | 2009-04-19 18:10:56 +0100 | [diff] [blame] | 2069 | unsigned int count = macro_real_token_count (macro); |
| 2070 | for (i = 0; i < count; i++) |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2071 | { |
Neil Booth | 601328b | 2002-05-16 05:53:24 +0000 | [diff] [blame] | 2072 | cpp_token *token = ¯o->exp.tokens[i]; |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2073 | |
| 2074 | if (token->flags & PREV_WHITE) |
| 2075 | *buffer++ = ' '; |
| 2076 | if (token->flags & STRINGIFY_ARG) |
| 2077 | *buffer++ = '#'; |
| 2078 | |
| 2079 | if (token->type == CPP_MACRO_ARG) |
| 2080 | { |
Neil Booth | a28c5035 | 2001-05-16 22:02:09 +0000 | [diff] [blame] | 2081 | memcpy (buffer, |
Joseph Myers | 9a0c618 | 2009-05-10 15:27:32 +0100 | [diff] [blame^] | 2082 | NODE_NAME (macro->params[token->val.macro_arg.arg_no - 1]), |
| 2083 | NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1])); |
| 2084 | buffer += NODE_LEN (macro->params[token->val.macro_arg.arg_no - 1]); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2085 | } |
| 2086 | else |
Geoffrey Keating | 47e2049 | 2005-03-12 10:44:06 +0000 | [diff] [blame] | 2087 | buffer = cpp_spell_token (pfile, token, buffer, false); |
Neil Booth | 93c80368 | 2000-10-28 17:59:06 +0000 | [diff] [blame] | 2088 | |
| 2089 | if (token->flags & PASTE_LEFT) |
| 2090 | { |
| 2091 | *buffer++ = ' '; |
| 2092 | *buffer++ = '#'; |
| 2093 | *buffer++ = '#'; |
| 2094 | /* Next has PREV_WHITE; see _cpp_create_definition. */ |
| 2095 | } |
| 2096 | } |
| 2097 | } |
| 2098 | |
| 2099 | *buffer = '\0'; |
| 2100 | return pfile->macro_buffer; |
| 2101 | } |