| /* |
| * This file is part of the MicroPython project, http://micropython.org/ |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2013-2016 Damien P. George |
| * Copyright (c) 2016 Paul Sokolovsky |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "py/lexer.h" |
| |
| #if MICROPY_ENABLE_COMPILER |
| |
| typedef struct _mp_lexer_str32_buf_t { |
| const uint32_t *src_cur; |
| uint32_t val; |
| uint8_t byte_off; |
| } mp_lexer_str32_buf_t; |
| |
| static mp_uint_t str32_buf_next_byte(void *sb_in) { |
| mp_lexer_str32_buf_t *sb = (mp_lexer_str32_buf_t *)sb_in; |
| byte c = sb->val & 0xff; |
| if (c == 0) { |
| return MP_READER_EOF; |
| } |
| |
| if (++sb->byte_off > 3) { |
| sb->byte_off = 0; |
| sb->val = *sb->src_cur++; |
| } else { |
| sb->val >>= 8; |
| } |
| |
| return c; |
| } |
| |
| static void str32_buf_free(void *sb_in) { |
| mp_lexer_str32_buf_t *sb = (mp_lexer_str32_buf_t *)sb_in; |
| m_del_obj(mp_lexer_str32_buf_t, sb); |
| } |
| |
| mp_lexer_t *mp_lexer_new_from_str32(qstr src_name, const char *str, mp_uint_t len, mp_uint_t free_len) { |
| mp_lexer_str32_buf_t *sb = m_new_obj(mp_lexer_str32_buf_t); |
| sb->byte_off = (uint32_t)str & 3; |
| sb->src_cur = (uint32_t *)(str - sb->byte_off); |
| sb->val = *sb->src_cur++ >> sb->byte_off * 8; |
| mp_reader_t reader = {sb, str32_buf_next_byte, str32_buf_free}; |
| return mp_lexer_new(src_name, reader); |
| } |
| |
| #endif // MICROPY_ENABLE_COMPILER |