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Improve slightly guess_endianness

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This commit is contained in:
bnnm 2019-02-03 01:46:05 +01:00
parent ab807c3416
commit b2f3c860d5
1 changed files with 6 additions and 5 deletions
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11
src/streamfile.h
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@ -184,7 +184,6 @@ static inline int64_t read_64bitBE(off_t offset, STREAMFILE * streamfile) {
if (read_streamfile(buf,offset,8,streamfile)!=8) return -1;
return get_64bitBE(buf);
}
static inline int8_t read_8bit(off_t offset, STREAMFILE * streamfile) {
uint8_t buf[1];
@ -193,13 +192,15 @@ static inline int8_t read_8bit(off_t offset, STREAMFILE * streamfile) {
}
/* guess byte endianness from a given value, return true if big endian and false if little endian */
/* TODO: possibly improve */
static inline int guess_endianness16bit(off_t offset, STREAMFILE * streamfile) {
return ((uint16_t)read_16bitLE(offset,streamfile) > (uint16_t)read_16bitBE(offset,streamfile)) ? 1 : 0;
uint8_t buf[0x02];
if (read_streamfile(buf,offset,0x02,streamfile) != 0x02) return -1; /* ? */
return (uint16_t)get_16bitLE(buf) > (uint16_t)get_16bitBE(buf) ? 1 : 0;
}
static inline int guess_endianness32bit(off_t offset, STREAMFILE * streamfile) {
return ((uint32_t)read_32bitLE(offset,streamfile) > (uint32_t)read_32bitBE(offset,streamfile)) ? 1 : 0;
uint8_t buf[0x04];
if (read_streamfile(buf,offset,0x04,streamfile) != 0x04) return -1; /* ? */
return (uint32_t)get_32bitLE(buf) > (uint32_t)get_32bitBE(buf) ? 1 : 0;
}
static inline size_t align_size_to_block(size_t value, size_t block_align) {