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lifegpc
2022-01-08 22:44:54 +08:00
parent 44c7d3b589
commit 0a9e149e66
6 changed files with 133 additions and 3 deletions
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34
file_reader.c
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@@ -60,6 +60,40 @@ void set_file_reader_endian(file_reader_file* f, unsigned char endian) {
f->endian = endian;
}
int file_reader_read_char(file_reader_file* f, char* re) {
if (!f) return 1;
char buf[1];
if (!f->read(f->f, 1, buf)) {
return 1;
}
if (re) *re = buf[0];
return 0;
}
int file_reader_read_uint8(file_reader_file* f, uint8_t* re) {
return file_reader_read_char(f, (char*)re);
}
int file_reader_read_int16(file_reader_file* f, int16_t* re) {
if (!f) return 1;
int64_t offset = f->tell(f->f);
int16_t r = 0;
int origin = SEEK_SET;
if (offset == -1) {
origin = SEEK_CUR;
}
size_t c;
uint8_t buf[2];
if ((c = f->read(f->f, 2, buf)) < 2) {
if (origin == SEEK_CUR) offset = -c;
f->seek(f->f, offset, origin);
return 1;
}
r = cstr_read_int16(buf, f->endian);
if (re) *re = r;
return 0;
}
int file_reader_read_int32(file_reader_file* f, int32_t* re) {
if (!f) return 1;
int64_t offset = f->tell(f->f);