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-rw-r--r--lib/vsprintf.c495
1 files changed, 300 insertions, 195 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 33bed5e67a2..d4996cf46eb 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -9,7 +9,7 @@
* Wirzenius wrote this portably, Torvalds fucked it up :-)
*/
-/*
+/*
* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
* - changed to provide snprintf and vsnprintf functions
* So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
@@ -47,14 +47,14 @@ static unsigned int simple_guess_base(const char *cp)
}
/**
- * simple_strtoul - convert a string to an unsigned long
+ * simple_strtoull - convert a string to an unsigned long long
* @cp: The start of the string
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
{
- unsigned long result = 0;
+ unsigned long long result = 0;
if (!base)
base = simple_guess_base(cp);
@@ -71,58 +71,39 @@ unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
result = result * base + value;
cp++;
}
-
if (endp)
*endp = (char *)cp;
+
return result;
}
-EXPORT_SYMBOL(simple_strtoul);
+EXPORT_SYMBOL(simple_strtoull);
/**
- * simple_strtol - convert a string to a signed long
+ * simple_strtoul - convert a string to an unsigned long
* @cp: The start of the string
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-long simple_strtol(const char *cp, char **endp, unsigned int base)
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
{
- if(*cp == '-')
- return -simple_strtoul(cp + 1, endp, base);
- return simple_strtoul(cp, endp, base);
+ return simple_strtoull(cp, endp, base);
}
-EXPORT_SYMBOL(simple_strtol);
+EXPORT_SYMBOL(simple_strtoul);
/**
- * simple_strtoull - convert a string to an unsigned long long
+ * simple_strtol - convert a string to a signed long
* @cp: The start of the string
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
+long simple_strtol(const char *cp, char **endp, unsigned int base)
{
- unsigned long long result = 0;
-
- if (!base)
- base = simple_guess_base(cp);
-
- if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
-
- while (isxdigit(*cp)) {
- unsigned int value;
-
- value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
- if (value >= base)
- break;
- result = result * base + value;
- cp++;
- }
+ if (*cp == '-')
+ return -simple_strtoul(cp + 1, endp, base);
- if (endp)
- *endp = (char *)cp;
- return result;
+ return simple_strtoul(cp, endp, base);
}
-EXPORT_SYMBOL(simple_strtoull);
+EXPORT_SYMBOL(simple_strtol);
/**
* simple_strtoll - convert a string to a signed long long
@@ -132,8 +113,9 @@ EXPORT_SYMBOL(simple_strtoull);
*/
long long simple_strtoll(const char *cp, char **endp, unsigned int base)
{
- if(*cp=='-')
+ if (*cp == '-')
return -simple_strtoull(cp + 1, endp, base);
+
return simple_strtoull(cp, endp, base);
}
@@ -173,6 +155,7 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
val = simple_strtoul(cp, &tail, base);
if (tail == cp)
return -EINVAL;
+
if ((*tail == '\0') ||
((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
*res = val;
@@ -285,10 +268,11 @@ EXPORT_SYMBOL(strict_strtoll);
static int skip_atoi(const char **s)
{
- int i=0;
+ int i = 0;
while (isdigit(**s))
i = i*10 + *((*s)++) - '0';
+
return i;
}
@@ -302,7 +286,7 @@ static int skip_atoi(const char **s)
/* Formats correctly any integer in [0,99999].
* Outputs from one to five digits depending on input.
* On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
-static char* put_dec_trunc(char *buf, unsigned q)
+static char *put_dec_trunc(char *buf, unsigned q)
{
unsigned d3, d2, d1, d0;
d1 = (q>>4) & 0xf;
@@ -331,14 +315,15 @@ static char* put_dec_trunc(char *buf, unsigned q)
d3 = d3 - 10*q;
*buf++ = d3 + '0'; /* next digit */
if (q != 0)
- *buf++ = q + '0'; /* most sign. digit */
+ *buf++ = q + '0'; /* most sign. digit */
}
}
}
+
return buf;
}
/* Same with if's removed. Always emits five digits */
-static char* put_dec_full(char *buf, unsigned q)
+static char *put_dec_full(char *buf, unsigned q)
{
/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
/* but anyway, gcc produces better code with full-sized ints */
@@ -347,14 +332,15 @@ static char* put_dec_full(char *buf, unsigned q)
d2 = (q>>8) & 0xf;
d3 = (q>>12);
- /* Possible ways to approx. divide by 10 */
- /* gcc -O2 replaces multiply with shifts and adds */
- // (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
- // (x * 0x67) >> 10: 1100111
- // (x * 0x34) >> 9: 110100 - same
- // (x * 0x1a) >> 8: 11010 - same
- // (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
-
+ /*
+ * Possible ways to approx. divide by 10
+ * gcc -O2 replaces multiply with shifts and adds
+ * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
+ * (x * 0x67) >> 10: 1100111
+ * (x * 0x34) >> 9: 110100 - same
+ * (x * 0x1a) >> 8: 11010 - same
+ * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
+ */
d0 = 6*(d3 + d2 + d1) + (q & 0xf);
q = (d0 * 0xcd) >> 11;
d0 = d0 - 10*q;
@@ -375,10 +361,11 @@ static char* put_dec_full(char *buf, unsigned q)
d3 = d3 - 10*q;
*buf++ = d3 + '0';
*buf++ = q + '0';
+
return buf;
}
/* No inlining helps gcc to use registers better */
-static noinline char* put_dec(char *buf, unsigned long long num)
+static noinline char *put_dec(char *buf, unsigned long long num)
{
while (1) {
unsigned rem;
@@ -448,9 +435,9 @@ static char *number(char *buf, char *end, unsigned long long num,
spec.flags &= ~ZEROPAD;
sign = 0;
if (spec.flags & SIGN) {
- if ((signed long long) num < 0) {
+ if ((signed long long)num < 0) {
sign = '-';
- num = - (signed long long) num;
+ num = -(signed long long)num;
spec.field_width--;
} else if (spec.flags & PLUS) {
sign = '+';
@@ -478,7 +465,9 @@ static char *number(char *buf, char *end, unsigned long long num,
else if (spec.base != 10) { /* 8 or 16 */
int mask = spec.base - 1;
int shift = 3;
- if (spec.base == 16) shift = 4;
+
+ if (spec.base == 16)
+ shift = 4;
do {
tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
num >>= shift;
@@ -493,7 +482,7 @@ static char *number(char *buf, char *end, unsigned long long num,
/* leading space padding */
spec.field_width -= spec.precision;
if (!(spec.flags & (ZEROPAD+LEFT))) {
- while(--spec.field_width >= 0) {
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
@@ -543,15 +532,16 @@ static char *number(char *buf, char *end, unsigned long long num,
*buf = ' ';
++buf;
}
+
return buf;
}
-static char *string(char *buf, char *end, char *s, struct printf_spec spec)
+static char *string(char *buf, char *end, const char *s, struct printf_spec spec)
{
int len, i;
if ((unsigned long)s < PAGE_SIZE)
- s = "<NULL>";
+ s = "(null)";
len = strnlen(s, spec.precision);
@@ -572,6 +562,7 @@ static char *string(char *buf, char *end, char *s, struct printf_spec spec)
*buf = ' ';
++buf;
}
+
return buf;
}
@@ -585,47 +576,101 @@ static char *symbol_string(char *buf, char *end, void *ptr,
sprint_symbol(sym, value);
else
kallsyms_lookup(value, NULL, NULL, NULL, sym);
+
return string(buf, end, sym, spec);
#else
- spec.field_width = 2*sizeof(void *);
+ spec.field_width = 2 * sizeof(void *);
spec.flags |= SPECIAL | SMALL | ZEROPAD;
spec.base = 16;
+
return number(buf, end, value, spec);
#endif
}
static char *resource_string(char *buf, char *end, struct resource *res,
- struct printf_spec spec)
+ struct printf_spec spec, const char *fmt)
{
#ifndef IO_RSRC_PRINTK_SIZE
-#define IO_RSRC_PRINTK_SIZE 4
+#define IO_RSRC_PRINTK_SIZE 6
#endif
#ifndef MEM_RSRC_PRINTK_SIZE
-#define MEM_RSRC_PRINTK_SIZE 8
+#define MEM_RSRC_PRINTK_SIZE 10
#endif
- struct printf_spec num_spec = {
+ struct printf_spec hex_spec = {
.base = 16,
.precision = -1,
.flags = SPECIAL | SMALL | ZEROPAD,
};
- /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
- char sym[4*sizeof(resource_size_t) + 8];
+ struct printf_spec dec_spec = {
+ .base = 10,
+ .precision = -1,
+ .flags = 0,
+ };
+ struct printf_spec str_spec = {
+ .field_width = -1,
+ .precision = 10,
+ .flags = LEFT,
+ };
+ struct printf_spec flag_spec = {
+ .base = 16,
+ .precision = -1,
+ .flags = SPECIAL | SMALL,
+ };
+
+ /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8)
+ * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */
+#define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4)
+#define FLAG_BUF_SIZE (2 * sizeof(res->flags))
+#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]")
+#define RAW_BUF_SIZE sizeof("[mem - flags 0x]")
+ char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+ 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
+
char *p = sym, *pend = sym + sizeof(sym);
- int size = -1;
+ int size = -1, addr = 0;
+ int decode = (fmt[0] == 'R') ? 1 : 0;
- if (res->flags & IORESOURCE_IO)
+ if (res->flags & IORESOURCE_IO) {
size = IO_RSRC_PRINTK_SIZE;
- else if (res->flags & IORESOURCE_MEM)
+ addr = 1;
+ } else if (res->flags & IORESOURCE_MEM) {
size = MEM_RSRC_PRINTK_SIZE;
+ addr = 1;
+ }
*p++ = '[';
- num_spec.field_width = size;
- p = number(p, pend, res->start, num_spec);
- *p++ = '-';
- p = number(p, pend, res->end, num_spec);
+ if (res->flags & IORESOURCE_IO)
+ p = string(p, pend, "io ", str_spec);
+ else if (res->flags & IORESOURCE_MEM)
+ p = string(p, pend, "mem ", str_spec);
+ else if (res->flags & IORESOURCE_IRQ)
+ p = string(p, pend, "irq ", str_spec);
+ else if (res->flags & IORESOURCE_DMA)
+ p = string(p, pend, "dma ", str_spec);
+ else {
+ p = string(p, pend, "??? ", str_spec);
+ decode = 0;
+ }
+ hex_spec.field_width = size;
+ p = number(p, pend, res->start, addr ? hex_spec : dec_spec);
+ if (res->start != res->end) {
+ *p++ = '-';
+ p = number(p, pend, res->end, addr ? hex_spec : dec_spec);
+ }
+ if (decode) {
+ if (res->flags & IORESOURCE_MEM_64)
+ p = string(p, pend, " 64bit", str_spec);
+ if (res->flags & IORESOURCE_PREFETCH)
+ p = string(p, pend, " pref", str_spec);
+ if (res->flags & IORESOURCE_DISABLED)
+ p = string(p, pend, " disabled", str_spec);
+ } else {
+ p = string(p, pend, " flags ", str_spec);
+ p = number(p, pend, res->flags, flag_spec);
+ }
*p++ = ']';
- *p = 0;
+ *p = '\0';
return string(buf, end, sym, spec);
}
@@ -666,22 +711,19 @@ static char *ip4_string(char *p, const u8 *addr, bool leading_zeros)
if (i < 3)
*p++ = '.';
}
-
*p = '\0';
+
return p;
}
static char *ip6_compressed_string(char *p, const char *addr)
{
- int i;
- int j;
- int range;
+ int i, j, range;
unsigned char zerolength[8];
int longest = 1;
int colonpos = -1;
u16 word;
- u8 hi;
- u8 lo;
+ u8 hi, lo;
bool needcolon = false;
bool useIPv4;
struct in6_addr in6;
@@ -735,8 +777,9 @@ static char *ip6_compressed_string(char *p, const char *addr)
p = pack_hex_byte(p, hi);
else
*p++ = hex_asc_lo(hi);
+ p = pack_hex_byte(p, lo);
}
- if (hi || lo > 0x0f)
+ else if (lo > 0x0f)
p = pack_hex_byte(p, lo);
else
*p++ = hex_asc_lo(lo);
@@ -748,22 +791,23 @@ static char *ip6_compressed_string(char *p, const char *addr)
*p++ = ':';
p = ip4_string(p, &in6.s6_addr[12], false);
}
-
*p = '\0';
+
return p;
}
static char *ip6_string(char *p, const char *addr, const char *fmt)
{
int i;
+
for (i = 0; i < 8; i++) {
p = pack_hex_byte(p, *addr++);
p = pack_hex_byte(p, *addr++);
if (fmt[0] == 'I' && i != 7)
*p++ = ':';
}
-
*p = '\0';
+
return p;
}
@@ -790,6 +834,52 @@ static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
return string(buf, end, ip4_addr, spec);
}
+static char *uuid_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
+{
+ char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
+ char *p = uuid;
+ int i;
+ static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
+ static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
+ const u8 *index = be;
+ bool uc = false;
+
+ switch (*(++fmt)) {
+ case 'L':
+ uc = true; /* fall-through */
+ case 'l':
+ index = le;
+ break;
+ case 'B':
+ uc = true;
+ break;
+ }
+
+ for (i = 0; i < 16; i++) {
+ p = pack_hex_byte(p, addr[index[i]]);
+ switch (i) {
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ *p++ = '-';
+ break;
+ }
+ }
+
+ *p = 0;
+
+ if (uc) {
+ p = uuid;
+ do {
+ *p = toupper(*p);
+ } while (*(++p));
+ }
+
+ return string(buf, end, uuid, spec);
+}
+
/*
* Show a '%p' thing. A kernel extension is that the '%p' is followed
* by an extra set of alphanumeric characters that are extended format
@@ -801,8 +891,8 @@ static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
* - 'f' For simple symbolic function names without offset
* - 'S' For symbolic direct pointers with offset
* - 's' For symbolic direct pointers without offset
- * - 'R' For a struct resource pointer, it prints the range of
- * addresses (not the name nor the flags)
+ * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
+ * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
* - 'M' For a 6-byte MAC address, it prints the address in the
* usual colon-separated hex notation
* - 'm' For a 6-byte MAC address, it prints the hex address without colons
@@ -814,6 +904,18 @@ static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
* IPv4 uses dot-separated decimal with leading 0's (010.123.045.006)
* - 'I6c' for IPv6 addresses printed as specified by
* http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt
+ * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form
+ * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+ * Options for %pU are:
+ * b big endian lower case hex (default)
+ * B big endian UPPER case hex
+ * l little endian lower case hex
+ * L little endian UPPER case hex
+ * big endian output byte order is:
+ * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15]
+ * little endian output byte order is:
+ * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15]
+ *
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64
* function pointers are really function descriptors, which contain a
* pointer to the real address.
@@ -828,12 +930,13 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
case 'F':
case 'f':
ptr = dereference_function_descriptor(ptr);
- case 's':
/* Fallthrough */
case 'S':
+ case 's':
return symbol_string(buf, end, ptr, spec, *fmt);
case 'R':
- return resource_string(buf, end, ptr, spec);
+ case 'r':
+ return resource_string(buf, end, ptr, spec, fmt);
case 'M': /* Colon separated: 00:01:02:03:04:05 */
case 'm': /* Contiguous: 000102030405 */
return mac_address_string(buf, end, ptr, spec, fmt);
@@ -853,6 +956,8 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
return ip4_addr_string(buf, end, ptr, spec, fmt);
}
break;
+ case 'U':
+ return uuid_string(buf, end, ptr, spec, fmt);
}
spec.flags |= SMALL;
if (spec.field_width == -1) {
@@ -970,8 +1075,8 @@ precision:
qualifier:
/* get the conversion qualifier */
spec->qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
+ if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
+ TOLOWER(*fmt) == 'z' || *fmt == 't') {
spec->qualifier = *fmt++;
if (unlikely(spec->qualifier == *fmt)) {
if (spec->qualifier == 'l') {
@@ -1038,7 +1143,7 @@ qualifier:
spec->type = FORMAT_TYPE_LONG;
else
spec->type = FORMAT_TYPE_ULONG;
- } else if (spec->qualifier == 'Z' || spec->qualifier == 'z') {
+ } else if (TOLOWER(spec->qualifier) == 'z') {
spec->type = FORMAT_TYPE_SIZE_T;
} else if (spec->qualifier == 't') {
spec->type = FORMAT_TYPE_PTRDIFF;
@@ -1074,7 +1179,18 @@ qualifier:
* %ps output the name of a text symbol without offset
* %pF output the name of a function pointer with its offset
* %pf output the name of a function pointer without its offset
- * %pR output the address range in a struct resource
+ * %pR output the address range in a struct resource with decoded flags
+ * %pr output the address range in a struct resource with raw flags
+ * %pM output a 6-byte MAC address with colons
+ * %pm output a 6-byte MAC address without colons
+ * %pI4 print an IPv4 address without leading zeros
+ * %pi4 print an IPv4 address with leading zeros
+ * %pI6 print an IPv6 address with colons
+ * %pi6 print an IPv6 address without colons
+ * %pI6c print an IPv6 address as specified by
+ * http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt
+ * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
+ * case.
* %n is ignored
*
* The return value is the number of characters which would
@@ -1091,8 +1207,7 @@ qualifier:
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
unsigned long long num;
- char *str, *end, c;
- int read;
+ char *str, *end;
struct printf_spec spec = {0};
/* Reject out-of-range values early. Large positive sizes are
@@ -1111,8 +1226,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
while (*fmt) {
const char *old_fmt = fmt;
-
- read = format_decode(fmt, &spec);
+ int read = format_decode(fmt, &spec);
fmt += read;
@@ -1136,7 +1250,9 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
spec.precision = va_arg(args, int);
break;
- case FORMAT_TYPE_CHAR:
+ case FORMAT_TYPE_CHAR: {
+ char c;
+
if (!(spec.flags & LEFT)) {
while (--spec.field_width > 0) {
if (str < end)
@@ -1155,6 +1271,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
++str;
}
break;
+ }
case FORMAT_TYPE_STR:
str = string(str, end, va_arg(args, char *), spec);
@@ -1185,8 +1302,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
if (qualifier == 'l') {
long *ip = va_arg(args, long *);
*ip = (str - buf);
- } else if (qualifier == 'Z' ||
- qualifier == 'z') {
+ } else if (TOLOWER(qualifier) == 'z') {
size_t *ip = va_arg(args, size_t *);
*ip = (str - buf);
} else {
@@ -1269,7 +1385,8 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
int i;
- i=vsnprintf(buf,size,fmt,args);
+ i = vsnprintf(buf, size, fmt, args);
+
return (i >= size) ? (size - 1) : i;
}
EXPORT_SYMBOL(vscnprintf);
@@ -1288,14 +1405,15 @@ EXPORT_SYMBOL(vscnprintf);
*
* See the vsnprintf() documentation for format string extensions over C99.
*/
-int snprintf(char * buf, size_t size, const char *fmt, ...)
+int snprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
- i=vsnprintf(buf,size,fmt,args);
+ i = vsnprintf(buf, size, fmt, args);
va_end(args);
+
return i;
}
EXPORT_SYMBOL(snprintf);
@@ -1311,7 +1429,7 @@ EXPORT_SYMBOL(snprintf);
* the trailing '\0'. If @size is <= 0 the function returns 0.
*/
-int scnprintf(char * buf, size_t size, const char *fmt, ...)
+int scnprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
@@ -1319,6 +1437,7 @@ int scnprintf(char * buf, size_t size, const char *fmt, ...)
va_start(args, fmt);
i = vsnprintf(buf, size, fmt, args);
va_end(args);
+
return (i >= size) ? (size - 1) : i;
}
EXPORT_SYMBOL(scnprintf);
@@ -1356,14 +1475,15 @@ EXPORT_SYMBOL(vsprintf);
*
* See the vsnprintf() documentation for format string extensions over C99.
*/
-int sprintf(char * buf, const char *fmt, ...)
+int sprintf(char *buf, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
- i=vsnprintf(buf, INT_MAX, fmt, args);
+ i = vsnprintf(buf, INT_MAX, fmt, args);
va_end(args);
+
return i;
}
EXPORT_SYMBOL(sprintf);
@@ -1396,7 +1516,6 @@ int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
{
struct printf_spec spec = {0};
char *str, *end;
- int read;
str = (char *)bin_buf;
end = (char *)(bin_buf + size);
@@ -1421,14 +1540,15 @@ do { \
str += sizeof(type); \
} while (0)
-
while (*fmt) {
- read = format_decode(fmt, &spec);
+ int read = format_decode(fmt, &spec);
fmt += read;
switch (spec.type) {
case FORMAT_TYPE_NONE:
+ case FORMAT_TYPE_INVALID:
+ case FORMAT_TYPE_PERCENT_CHAR:
break;
case FORMAT_TYPE_WIDTH:
@@ -1443,13 +1563,14 @@ do { \
case FORMAT_TYPE_STR: {
const char *save_str = va_arg(args, char *);
size_t len;
+
if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
|| (unsigned long)save_str < PAGE_SIZE)
- save_str = "<NULL>";
- len = strlen(save_str);
- if (str + len + 1 < end)
- memcpy(str, save_str, len + 1);
- str += len + 1;
+ save_str = "(null)";
+ len = strlen(save_str) + 1;
+ if (str + len < end)
+ memcpy(str, save_str, len);
+ str += len;
break;
}
@@ -1460,19 +1581,13 @@ do { \
fmt++;
break;
- case FORMAT_TYPE_PERCENT_CHAR:
- break;
-
- case FORMAT_TYPE_INVALID:
- break;
-
case FORMAT_TYPE_NRCHARS: {
/* skip %n 's argument */
int qualifier = spec.qualifier;
void *skip_arg;
if (qualifier == 'l')
skip_arg = va_arg(args, long *);
- else if (qualifier == 'Z' || qualifier == 'z')
+ else if (TOLOWER(qualifier) == 'z')
skip_arg = va_arg(args, size_t *);
else
skip_arg = va_arg(args, int *);
@@ -1508,8 +1623,8 @@ do { \
}
}
}
- return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
+ return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
#undef save_arg
}
EXPORT_SYMBOL_GPL(vbin_printf);
@@ -1538,11 +1653,9 @@ EXPORT_SYMBOL_GPL(vbin_printf);
*/
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
{
- unsigned long long num;
- char *str, *end, c;
- const char *args = (const char *)bin_buf;
-
struct printf_spec spec = {0};
+ char *str, *end;
+ const char *args = (const char *)bin_buf;
if (WARN_ON_ONCE((int) size < 0))
return 0;
@@ -1572,10 +1685,8 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
}
while (*fmt) {
- int read;
const char *old_fmt = fmt;
-
- read = format_decode(fmt, &spec);
+ int read = format_decode(fmt, &spec);
fmt += read;
@@ -1599,7 +1710,9 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
spec.precision = get_arg(int);
break;
- case FORMAT_TYPE_CHAR:
+ case FORMAT_TYPE_CHAR: {
+ char c;
+
if (!(spec.flags & LEFT)) {
while (--spec.field_width > 0) {
if (str < end)
@@ -1617,11 +1730,11 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
++str;
}
break;
+ }
case FORMAT_TYPE_STR: {
const char *str_arg = args;
- size_t len = strlen(str_arg);
- args += len + 1;
+ args += strlen(str_arg) + 1;
str = string(str, end, (char *)str_arg, spec);
break;
}
@@ -1633,11 +1746,6 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
break;
case FORMAT_TYPE_PERCENT_CHAR:
- if (str < end)
- *str = '%';
- ++str;
- break;
-
case FORMAT_TYPE_INVALID:
if (str < end)
*str = '%';
@@ -1648,15 +1756,15 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
/* skip */
break;
- default:
+ default: {
+ unsigned long long num;
+
switch (spec.type) {
case FORMAT_TYPE_LONG_LONG:
num = get_arg(long long);
break;
case FORMAT_TYPE_ULONG:
- num = get_arg(unsigned long);
- break;
case FORMAT_TYPE_LONG:
num = get_arg(unsigned long);
break;
@@ -1686,8 +1794,9 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
}
str = number(str, end, num, spec);
- }
- }
+ } /* default: */
+ } /* switch(spec.type) */
+ } /* while(*fmt) */
if (size > 0) {
if (str < end)
@@ -1721,6 +1830,7 @@ int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
va_start(args, fmt);
ret = vbin_printf(bin_buf, size, fmt, args);
va_end(args);
+
return ret;
}
EXPORT_SYMBOL_GPL(bprintf);
@@ -1733,27 +1843,23 @@ EXPORT_SYMBOL_GPL(bprintf);
* @fmt: format of buffer
* @args: arguments
*/
-int vsscanf(const char * buf, const char * fmt, va_list args)
+int vsscanf(const char *buf, const char *fmt, va_list args)
{
const char *str = buf;
char *next;
char digit;
int num = 0;
- int qualifier;
- int base;
- int field_width;
- int is_sign = 0;
+ int qualifier, base, field_width;
+ bool is_sign;
- while(*fmt && *str) {
+ while (*fmt && *str) {
/* skip any white space in format */
/* white space in format matchs any amount of
* white space, including none, in the input.
*/
if (isspace(*fmt)) {
- while (isspace(*fmt))
- ++fmt;
- while (isspace(*str))
- ++str;
+ fmt = skip_spaces(++fmt);
+ str = skip_spaces(str);
}
/* anything that is not a conversion must match exactly */
@@ -1766,7 +1872,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
if (!*fmt)
break;
++fmt;
-
+
/* skip this conversion.
* advance both strings to next white space
*/
@@ -1785,8 +1891,8 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
/* get conversion qualifier */
qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z') {
+ if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
+ TOLOWER(*fmt) == 'z') {
qualifier = *fmt++;
if (unlikely(qualifier == *fmt)) {
if (qualifier == 'h') {
@@ -1798,16 +1904,17 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
}
}
}
- base = 10;
- is_sign = 0;
if (!*fmt || !*str)
break;
- switch(*fmt++) {
+ base = 10;
+ is_sign = 0;
+
+ switch (*fmt++) {
case 'c':
{
- char *s = (char *) va_arg(args,char*);
+ char *s = (char *)va_arg(args, char*);
if (field_width == -1)
field_width = 1;
do {
@@ -1818,17 +1925,15 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
continue;
case 's':
{
- char *s = (char *) va_arg(args, char *);
- if(field_width == -1)
+ char *s = (char *)va_arg(args, char *);
+ if (field_width == -1)
field_width = INT_MAX;
/* first, skip leading white space in buffer */
- while (isspace(*str))
- str++;
+ str = skip_spaces(str);
/* now copy until next white space */
- while (*str && !isspace(*str) && field_width--) {
+ while (*str && !isspace(*str) && field_width--)
*s++ = *str++;
- }
*s = '\0';
num++;
}
@@ -1836,7 +1941,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
case 'n':
/* return number of characters read so far */
{
- int *i = (int *)va_arg(args,int*);
+ int *i = (int *)va_arg(args, int*);
*i = str - buf;
}
continue;
@@ -1848,14 +1953,14 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
base = 16;
break;
case 'i':
- base = 0;
+ base = 0;
case 'd':
is_sign = 1;
case 'u':
break;
case '%':
/* looking for '%' in str */
- if (*str++ != '%')
+ if (*str++ != '%')
return num;
continue;
default:
@@ -1866,71 +1971,70 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
/* have some sort of integer conversion.
* first, skip white space in buffer.
*/
- while (isspace(*str))
- str++;
+ str = skip_spaces(str);
digit = *str;
if (is_sign && digit == '-')
digit = *(str + 1);
if (!digit
- || (base == 16 && !isxdigit(digit))
- || (base == 10 && !isdigit(digit))
- || (base == 8 && (!isdigit(digit) || digit > '7'))
- || (base == 0 && !isdigit(digit)))
- break;
+ || (base == 16 && !isxdigit(digit))
+ || (base == 10 && !isdigit(digit))
+ || (base == 8 && (!isdigit(digit) || digit > '7'))
+ || (base == 0 && !isdigit(digit)))
+ break;
- switch(qualifier) {
+ switch (qualifier) {
case 'H': /* that's 'hh' in format */
if (is_sign) {
- signed char *s = (signed char *) va_arg(args,signed char *);
- *s = (signed char) simple_strtol(str,&next,base);
+ signed char *s = (signed char *)va_arg(args, signed char *);
+ *s = (signed char)simple_strtol(str, &next, base);
} else {
- unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
- *s = (unsigned char) simple_strtoul(str, &next, base);
+ unsigned char *s = (unsigned char *)va_arg(args, unsigned char *);
+ *s = (unsigned char)simple_strtoul(str, &next, base);
}
break;
case 'h':
if (is_sign) {
- short *s = (short *) va_arg(args,short *);
- *s = (short) simple_strtol(str,&next,base);
+ short *s = (short *)va_arg(args, short *);
+ *s = (short)simple_strtol(str, &next, base);
} else {
- unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
- *s = (unsigned short) simple_strtoul(str, &next, base);
+ unsigned short *s = (unsigned short *)va_arg(args, unsigned short *);
+ *s = (unsigned short)simple_strtoul(str, &next, base);
}
break;
case 'l':
if (is_sign) {
- long *l = (long *) va_arg(args,long *);
- *l = simple_strtol(str,&next,base);
+ long *l = (long *)va_arg(args, long *);
+ *l = simple_strtol(str, &next, base);
} else {
- unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
- *l = simple_strtoul(str,&next,base);
+ unsigned long *l = (unsigned long *)va_arg(args, unsigned long *);
+ *l = simple_strtoul(str, &next, base);
}
break;
case 'L':
if (is_sign) {
- long long *l = (long long*) va_arg(args,long long *);
- *l = simple_strtoll(str,&next,base);
+ long long *l = (long long *)va_arg(args, long long *);
+ *l = simple_strtoll(str, &next, base);
} else {
- unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
- *l = simple_strtoull(str,&next,base);
+ unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *);
+ *l = simple_strtoull(str, &next, base);
}
break;
case 'Z':
case 'z':
{
- size_t *s = (size_t*) va_arg(args,size_t*);
- *s = (size_t) simple_strtoul(str,&next,base);
+ size_t *s = (size_t *)va_arg(args, size_t *);
+ *s = (size_t)simple_strtoul(str, &next, base);
}
break;
default:
if (is_sign) {
- int *i = (int *) va_arg(args, int*);
- *i = (int) simple_strtol(str,&next,base);
+ int *i = (int *)va_arg(args, int *);
+ *i = (int)simple_strtol(str, &next, base);
} else {
- unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
- *i = (unsigned int) simple_strtoul(str,&next,base);
+ unsigned int *i = (unsigned int *)va_arg(args, unsigned int*);
+ *i = (unsigned int)simple_strtoul(str, &next, base);
}
break;
}
@@ -1961,14 +2065,15 @@ EXPORT_SYMBOL(vsscanf);
* @fmt: formatting of buffer
* @...: resulting arguments
*/
-int sscanf(const char * buf, const char * fmt, ...)
+int sscanf(const char *buf, const char *fmt, ...)
{
va_list args;
int i;
- va_start(args,fmt);
- i = vsscanf(buf,fmt,args);
+ va_start(args, fmt);
+ i = vsscanf(buf, fmt, args);
va_end(args);
+
return i;
}
EXPORT_SYMBOL(sscanf);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-28 17:00:28 +0000