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/*
* 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(mp_lexer_str32_buf_t *sb) {
byte c = sb->val & 0xff;
if (c == 0) {
return MP_LEXER_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(mp_lexer_str32_buf_t *sb) {
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_maybe(mp_lexer_str32_buf_t);
if (sb == NULL) {
return NULL;
}
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;
return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_byte_t)str32_buf_next_byte, (mp_lexer_stream_close_t)str32_buf_free);
}
#endif // MICROPY_ENABLE_COMPILER
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