62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
*
|
|
* 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"
|
|
|
|
typedef struct _mp_lexer_str_buf_t {
|
|
mp_uint_t free_len; // if > 0, src_beg will be freed when done by: m_free(src_beg, free_len)
|
|
const char *src_beg; // beginning of source
|
|
const char *src_cur; // current location in source
|
|
const char *src_end; // end (exclusive) of source
|
|
} mp_lexer_str_buf_t;
|
|
|
|
STATIC mp_uint_t str_buf_next_byte(mp_lexer_str_buf_t *sb) {
|
|
if (sb->src_cur < sb->src_end) {
|
|
return *sb->src_cur++;
|
|
} else {
|
|
return MP_LEXER_EOF;
|
|
}
|
|
}
|
|
|
|
STATIC void str_buf_free(mp_lexer_str_buf_t *sb) {
|
|
if (sb->free_len > 0) {
|
|
m_free((char*)sb->src_beg, sb->free_len);
|
|
}
|
|
m_del_obj(mp_lexer_str_buf_t, sb);
|
|
}
|
|
|
|
mp_lexer_t *mp_lexer_new_from_str_len(qstr src_name, const char *str, mp_uint_t len, mp_uint_t free_len) {
|
|
mp_lexer_str_buf_t *sb = m_new_obj_maybe(mp_lexer_str_buf_t);
|
|
if (sb == NULL) {
|
|
return NULL;
|
|
}
|
|
sb->free_len = free_len;
|
|
sb->src_beg = str;
|
|
sb->src_cur = str;
|
|
sb->src_end = str + len;
|
|
return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_byte_t)str_buf_next_byte, (mp_lexer_stream_close_t)str_buf_free);
|
|
}
|