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#define OFFSET(B, K) (((uint8_t *)B) + K)
#define INFOSIZE 512
#define INFO_OFFSET_SOLVER 0
#define INFO_SOLVER_STRLEN 20
#define INFO_OFFSET_INFOSIZE INFO_SOLVER_STRLEN
#define INFO_OFFSET_FULLSIZE (INFO_OFFSET_INFOSIZE + sizeof(uint64_t))
#define INFO_OFFSET_HASH (INFO_OFFSET_FULLSIZE + sizeof(uint64_t))
#define INFO_OFFSET_ENTRIES (INFO_OFFSET_HASH + sizeof(uint64_t))
#define INFO_OFFSET_BITS (INFO_OFFSET_ENTRIES + sizeof(uint64_t))
#define INFO_OFFSET_BASE (INFO_OFFSET_BITS + sizeof(uint8_t))
#define INFO_OFFSET_MAXVALUE (INFO_OFFSET_BASE + sizeof(uint8_t))
#define INFO_OFFSET_DISTRIBUTION (INFO_OFFSET_MAXVALUE + sizeof(uint8_t))
#define INFO_DISTRIBUTION_LEN 21
typedef struct {
char solver[INFO_SOLVER_STRLEN];
uint64_t infosize;
uint64_t fullsize;
uint64_t hash;
uint64_t entries;
uint8_t bits;
uint8_t base;
uint8_t maxvalue;
uint64_t distribution[INFO_DISTRIBUTION_LEN];
} tableinfo_t;
STATIC bool readtableinfo(const void *, tableinfo_t *);
STATIC bool writetableinfo(const tableinfo_t *, void *);
STATIC bool
readtableinfo(const void *buf, tableinfo_t *info)
{
if (buf == NULL) {
LOG("Error reading table: buffer in NULL\n");
return false;
}
if (info == NULL) {
LOG("Error reading table info: info struct is NULL\n");
return false;
}
memcpy(info->solver, OFFSET(buf, INFO_OFFSET_SOLVER),
INFO_SOLVER_STRLEN);
info->infosize = *(const uint64_t *)OFFSET(buf, INFO_OFFSET_INFOSIZE);
info->fullsize = *(const uint64_t *)OFFSET(buf, INFO_OFFSET_FULLSIZE);
info->hash = *(const uint64_t *)OFFSET(buf, INFO_OFFSET_HASH);
info->entries = *(const uint64_t *)OFFSET(buf, INFO_OFFSET_ENTRIES);
info->bits = *OFFSET(buf, INFO_OFFSET_BITS);
info->base = *OFFSET(buf, INFO_OFFSET_BASE);
info->maxvalue = *OFFSET(buf, INFO_OFFSET_MAXVALUE);
memcpy(info->distribution, OFFSET(buf, INFO_OFFSET_DISTRIBUTION),
INFO_DISTRIBUTION_LEN * sizeof(uint64_t));
return true;
}
STATIC bool
writetableinfo(const tableinfo_t *info, void *buf)
{
int i;
if (buf == NULL) {
LOG("Error reading table: buffer in NULL\n");
return false;
}
if (info == NULL) {
LOG("Error writing table info: provided info is NULL\n");
return false;
}
memcpy(OFFSET(buf, INFO_OFFSET_SOLVER), info->solver,
INFO_SOLVER_STRLEN);
/* Zeroing all chars after the end of the string, for consistency */
for (i = 1; i < INFO_SOLVER_STRLEN; i++)
if (*OFFSET(buf, i) == 0)
*OFFSET(buf, i) = 0;
*(uint64_t *)OFFSET(buf, INFO_OFFSET_INFOSIZE) = info->infosize;
*(uint64_t *)OFFSET(buf, INFO_OFFSET_FULLSIZE) = info->fullsize;
*(uint64_t *)OFFSET(buf, INFO_OFFSET_HASH) = info->hash;
*(uint64_t *)OFFSET(buf, INFO_OFFSET_ENTRIES) = info->entries;
*OFFSET(buf, INFO_OFFSET_BITS) = info->bits;
*OFFSET(buf, INFO_OFFSET_BASE) = info->base;
*OFFSET(buf, INFO_OFFSET_MAXVALUE) = info->maxvalue;
memcpy(OFFSET(buf, INFO_OFFSET_DISTRIBUTION), info->distribution,
INFO_DISTRIBUTION_LEN * sizeof(uint64_t));
return true;
}
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