69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "ff.h"
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#include "misc.h"
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#include "lexer.h"
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#include "lexerstm.h"
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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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void str_buf_free(mp_lexer_str_buf_t *sb) {
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if (sb->free) {
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m_del(char, (char*)sb->src_beg, 0 /* don't know allocated size of src */);
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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, bool free_str, mp_lexer_str_buf_t *sb) {
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sb->free = free_str;
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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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unichar file_buf_next_char(mp_lexer_file_buf_t *fb) {
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if (fb->pos >= fb->len) {
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if (fb->len < sizeof(fb->buf)) {
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return MP_LEXER_CHAR_EOF;
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} else {
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UINT n;
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f_read(&fb->fp, fb->buf, sizeof(fb->buf), &n);
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if (n == 0) {
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return MP_LEXER_CHAR_EOF;
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}
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fb->len = n;
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fb->pos = 0;
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}
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}
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return fb->buf[fb->pos++];
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}
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void file_buf_close(mp_lexer_file_buf_t *fb) {
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f_close(&fb->fp);
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}
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mp_lexer_t *mp_lexer_new_from_file(const char *filename, mp_lexer_file_buf_t *fb) {
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FRESULT res = f_open(&fb->fp, filename, FA_READ);
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if (res != FR_OK) {
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return NULL;
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}
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UINT n;
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f_read(&fb->fp, fb->buf, sizeof(fb->buf), &n);
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fb->len = n;
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fb->pos = 0;
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return mp_lexer_new(filename, fb, (mp_lexer_stream_next_char_t)file_buf_next_char, (mp_lexer_stream_close_t)file_buf_close);
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}
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mp_lexer_t *mp_import_open_file(qstr mod_name) {
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printf("import not implemented\n");
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return NULL;
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}
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