81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
#include "wccfile.h"
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// Wasm loop bounds
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__attribute__((import_module("__pragma"), import_name("loopbound"))) extern void
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__pragma_loopbound(unsigned int min_bound, unsigned int max_bound);
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#define EOF -1
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__attribute__((always_inline)) static inline size_t
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susan_wccfread(void *ptr, size_t size, size_t count, struct wccFILE *stream) {
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if (susan_wccfeof(stream))
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return EOF;
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unsigned i = stream->cur_pos, i2 = 0;
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size_t number_of_chars_to_read =
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stream->size - stream->cur_pos >= size * count
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? size * count
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: stream->size - stream->cur_pos;
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__pragma_loopbound(7220, 7220);
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while (i < stream->cur_pos + number_of_chars_to_read)
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((unsigned char *) ptr)[i2++] = stream->data[i++];
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stream->cur_pos += number_of_chars_to_read;
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return number_of_chars_to_read;
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}
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__attribute__((always_inline)) static inline int
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susan_wccfgetc(struct wccFILE *stream) {
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if (susan_wccfeof(stream))
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return EOF;
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else
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return stream->data[stream->cur_pos++];
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}
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__attribute__((always_inline)) static inline char *
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susan_wccfgets(char *str, int num, struct wccFILE *stream) {
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if (!stream || susan_wccfeof(stream) || !str || num <= 0)
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return 0;
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int pos = 0;
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__pragma_loopbound(57, 57);
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while (pos < num - 1 && !susan_wccfeof(stream)) {
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str[pos] = stream->data[stream->cur_pos];
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if (str[pos] == '\n')
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break;
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stream->cur_pos++;
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pos++;
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}
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str[pos++] = '\0';
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return str;
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}
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int
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susan_wccfseek(struct wccFILE *stream, long int offset, enum _Origin_ origin) {
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if (origin == WCCSEEK_SET) {
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stream->cur_pos = offset;
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return 0;
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} else if (origin == WCCSEEK_CUR) {
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stream->cur_pos += offset;
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return 0;
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} else if (origin == WCCSEEK_END) {
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stream->cur_pos = stream->size + offset;
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return 0;
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}
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return -1;
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}
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__attribute__((always_inline)) static inline int
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susan_wccfgetpos(struct wccFILE *stream, unsigned *position) {
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*position = stream->cur_pos;
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return 0;
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}
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__attribute__((always_inline)) static inline int
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susan_wccfeof(struct wccFILE *stream) {
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return stream->cur_pos == stream->size ? 1 : 0;
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}
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