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/*
* Copyright (C) 2011-2012 Codethink Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License Version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <endian.h>
#include <unistd.h>
#include <assert.h>
#include <tbdiff/tbdiff-stat.h>
#if __BYTE_ORDER == __BIG_ENDIAN
//inverts the indices of an array of bytes.
static void byteswap (char* value, int size) {
char tmp;
int i;
for (i = 0; i < size/2; i++) {
tmp = value[i];
value[i] = value[size-i-1];
value[size-i-1] = tmp;
}
}
#endif
size_t tbd_write_uint16_t (uint16_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_uint32_t (uint32_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_uint64_t (uint64_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_time_t (time_t value, FILE* stream) {
uint64_t realv = value;
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&realv, sizeof(realv));
#endif
return fwrite(&realv, sizeof(realv), 1, stream);
}
size_t tbd_write_mode_t (mode_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_uid_t (uid_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_gid_t (gid_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_write_size_t (size_t value, FILE* stream) {
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&value, sizeof(value));
#endif
return fwrite(&value, sizeof(value), 1, stream);
}
size_t tbd_read_uint16_t (uint16_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_uint32_t (uint32_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_uint64_t (uint64_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_time_t (time_t *value, FILE* stream) {
assert(value != NULL);
uint64_t realv;
size_t rval = fread(&realv, sizeof(realv), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)&realv, sizeof(realv));
#endif
*value = realv;
return rval;
}
size_t tbd_read_mode_t (mode_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_uid_t (uid_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_gid_t (gid_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
size_t tbd_read_size_t (size_t *value, FILE* stream) {
assert(value != NULL);
size_t rval = fread(value, sizeof(*value), 1, stream);
#if __BYTE_ORDER == __BIG_ENDIAN
byteswap((char*)value, sizeof(*value));
#endif
return rval;
}
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