mirror of
https://github.com/licsber/micropython.git
synced 2024-09-22 01:50:24 +08:00
d99b05282d
A big change. Micro Python objects are allocated as individual structs with the first element being a pointer to the type information (which is itself an object). This scheme follows CPython. Much more flexible, not necessarily slower, uses same heap memory, and can allocate objects statically. Also change name prefix, from py_ to mp_ (mp for Micro Python).
64 lines
1.6 KiB
C
64 lines
1.6 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_free((char*)sb->src_beg);
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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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