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/* Type definitions and macros are in a separate file for easier testing */
#include "tables_types_macros.h"
STATIC uint64_t read_unaligned_u64(const void *);
STATIC void write_unaligned_u64(void *, uint64_t);
STATIC bool readtableinfo(const void *, tableinfo_t *);
STATIC bool readtableinfo_n(const void *, uint8_t, tableinfo_t *);
STATIC bool writetableinfo(const tableinfo_t *, void *);
STATIC uint64_t
read_unaligned_u64(const void *buf)
{
uint64_t ret;
memcpy(&ret, buf, sizeof(uint64_t));
return ret;
}
STATIC void
write_unaligned_u64(void *buf, uint64_t x)
{
memcpy(buf, &x, sizeof(uint64_t));
}
STATIC bool
readtableinfo(const void *buf, tableinfo_t *info)
{
size_t i;
if (buf == NULL) {
LOG("Error reading table: buffer is NULL\n");
return false;
}
if (info == NULL) {
LOG("Error reading table info: info struct is NULL\n");
return false;
}
for (i = 0; i < INFO_DISTRIBUTION_LEN; i++)
info->distribution[i] = read_unaligned_u64(OFFSET(buf,
INFO_OFFSET_DISTRIBUTION + i * sizeof(uint64_t)));
info->type = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_TYPE));
info->infosize = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_INFOSIZE));
info->fullsize = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_FULLSIZE));
info->hash = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_HASH));
info->entries = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_ENTRIES));
info->classes = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_CLASSES));
info->next = read_unaligned_u64(OFFSET(buf, INFO_OFFSET_NEXT));
memcpy(info->solver, OFFSET(buf, INFO_OFFSET_SOLVER),
INFO_SOLVER_STRLEN);
info->h48h = *OFFSET(buf, INFO_OFFSET_H48H);
info->bits = *OFFSET(buf, INFO_OFFSET_BITS);
info->base = *OFFSET(buf, INFO_OFFSET_BASE);
info->maxvalue = *OFFSET(buf, INFO_OFFSET_MAXVALUE);
return true;
}
STATIC bool
readtableinfo_n(const void *buf, uint8_t n, tableinfo_t *info)
{
for ( ; n > 0; n--, buf = (char *)buf + info->next)
if (!readtableinfo(buf, info))
return false;
return true;
}
STATIC bool
writetableinfo(const tableinfo_t *info, void *buf)
{
size_t i;
bool end;
uint8_t *c;
if (buf == NULL) {
LOG("Error writing table: buffer is NULL\n");
return false;
}
if (info == NULL) {
LOG("Error writing table info: provided info is NULL\n");
return false;
}
for (i = 0; i < INFO_DISTRIBUTION_LEN; i++)
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_DISTRIBUTION +
i * sizeof(uint64_t)), info->distribution[i]);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_TYPE), info->type);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_INFOSIZE), info->infosize);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_FULLSIZE), info->fullsize);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_HASH), info->hash);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_ENTRIES), info->entries);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_CLASSES), info->classes);
write_unaligned_u64(OFFSET(buf, INFO_OFFSET_NEXT), info->next);
memcpy(OFFSET(buf, INFO_OFFSET_SOLVER), info->solver,
INFO_SOLVER_STRLEN);
/* Zeroing all chars after the end of the string, for consistency */
end = false;
for (i = 0; i < INFO_SOLVER_STRLEN; i++) {
c = OFFSET(buf, INFO_OFFSET_SOLVER + i);
end = end || *c == 0;
if (end)
*c = 0;
}
*OFFSET(buf, INFO_OFFSET_H48H) = info->h48h;
*OFFSET(buf, INFO_OFFSET_BITS) = info->bits;
*OFFSET(buf, INFO_OFFSET_BASE) = info->base;
*OFFSET(buf, INFO_OFFSET_MAXVALUE) = info->maxvalue;
return true;
}
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