36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "misc.h"
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#include "lexer.h"
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typedef struct _mp_lexer_str_buf_t {
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uint free_len; // if > 0, src_beg will be freed when done by: m_free(src_beg, free_len)
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const char *src_beg; // beginning of source
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const char *src_cur; // current location in source
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const char *src_end; // end (exclusive) of source
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} mp_lexer_str_buf_t;
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static unichar str_buf_next_char(mp_lexer_str_buf_t *sb) {
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if (sb->src_cur < sb->src_end) {
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return *sb->src_cur++;
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} else {
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return MP_LEXER_CHAR_EOF;
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}
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}
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static void str_buf_free(mp_lexer_str_buf_t *sb) {
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if (sb->free_len > 0) {
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m_free((char*)sb->src_beg, sb->free_len);
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}
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}
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mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, uint free_len) {
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mp_lexer_str_buf_t *sb = m_new_obj(mp_lexer_str_buf_t);
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sb->free_len = free_len;
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sb->src_beg = str;
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sb->src_cur = str;
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sb->src_end = str + len;
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return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_char_t)str_buf_next_char, (mp_lexer_stream_close_t)str_buf_free);
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}
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