/* Function: GSI64Open()
*
* Purpose: Open a GSI64 file. Returns the number of records in
* the file and a file pointer. Returns NULL on failure.
* The file pointer should be fclose()'d normally.
*/
GSI64FILE *
GSI64Open(char *gsifile)
{
GSI64FILE *gsi;
char magic[GSI64_KEYSIZE];
gsi = (GSI64FILE *) MallocOrDie (sizeof(GSI64FILE));
if ((gsi->gsifp = fopen(gsifile, "r")) == NULL)
{ free(gsi); squid_errno = SQERR_NOFILE; return NULL; }
if (! fread(magic, sizeof(char), GSI64_KEYSIZE, gsi->gsifp))
{ free(gsi); squid_errno = SQERR_NODATA; return NULL; }
if (strcmp(magic, "GSI64") != 0)
{ free(gsi); squid_errno = SQERR_FORMAT; return NULL; }
if (! fread(&(gsi->nfiles), sizeof(sqd_uint16), 1, gsi->gsifp))
{ free(gsi); squid_errno = SQERR_NODATA; return NULL; }
if (! fread(&(gsi->recnum), sizeof(sqd_uint64), 1, gsi->gsifp))
{ free(gsi); squid_errno = SQERR_NODATA; return NULL; }
#if 0 /* HACK! we don't byteswap */
gsi->nfiles = sre_ntohs(gsi->nfiles); /* convert from network short */
gsi->recnum = sre_ntohl(gsi->recnum); /* convert from network long */
#endif
return gsi;
}
/* Function: GSIOpen()
*
* Purpose: Open a GSI file. Returns the number of records in
* the file and a file pointer. Returns NULL on failure.
* The file pointer should be fclose()'d normally.
*/
GSIFILE *
GSIOpen(char *gsifile)
{
GSIFILE *gsi;
char magic[GSI_KEYSIZE];
gsi = (GSIFILE *) MallocOrDie (sizeof(GSIFILE));
if ((gsi->gsifp = fopen(gsifile, "r")) == NULL)
{ squid_errno = SQERR_NOFILE; return NULL; }
if (! fread(magic, sizeof(char), GSI_KEYSIZE, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return NULL; }
if (strcmp(magic, "GSI") != 0)
{ squid_errno = SQERR_FORMAT; return NULL; }
if (! fread(&(gsi->nfiles), sizeof(sqd_uint16), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return NULL; }
if (! fread(&(gsi->recnum), sizeof(sqd_uint32), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return NULL; }
gsi->nfiles = sre_ntohs(gsi->nfiles); /* convert from network short */
gsi->recnum = sre_ntohl(gsi->recnum); /* convert from network long */
return gsi;
}
/* Function: GSIGetRecord()
*
* Purpose: Each non-header record of a GSI index files consists
* of 38 bytes: 32 bytes of character string, a 2 byte
* short, and a 4 byte long. This function returns the
* three values.
*
* Args: gsi - open GSI index file, correctly positioned at a record
* f1 - char[32], allocated by caller (or NULL if unwanted)
* f2 - pointer to short (or NULL if unwanted)
* f3 - pointer to long (or NULL if unwanted)
*
* Return: 0 on failure and sets squid_errno.
*/
static int
GSIGetRecord(GSIFILE *gsi, char *f1, sqd_uint16 *f2, sqd_uint32 *f3)
{
if (f1 == NULL) fseek(gsi->gsifp, GSI_KEYSIZE, SEEK_CUR);
else if (! fread(f1, GSI_KEYSIZE, 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
if (f2 == NULL) fseek(gsi->gsifp, sizeof(sqd_uint16), SEEK_CUR);
else if (! fread(f2, sizeof(sqd_uint16), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
if (f3 == NULL) fseek(gsi->gsifp, sizeof(sqd_uint32), SEEK_CUR);
else if (! fread(f3, sizeof(sqd_uint32), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
if (f2 != NULL) *f2 = sre_ntohs(*f2);
if (f3 != NULL) *f3 = sre_ntohl(*f3);
return 1;
}
/* Function: GSI64GetRecord()
*
* Purpose: Each non-header record of a GSI64 index file consists
* of 42 bytes: 32 bytes of character string, a 2 byte
* short, and an 8 byte long long. This function returns the
* three values.
*
* Args: gsi - open GSI64 index file, correctly positioned at a record
* f1 - char[32], allocated by caller (or NULL if unwanted)
* f2 - pointer to short (or NULL if unwanted)
* f3 - pointer to long long (or NULL if unwanted)
*
* Return: 0 on failure and sets squid_errno.
*/
int
GSI64GetRecord(GSI64FILE *gsi, char *f1, sqd_uint16 *f2, sqd_uint64 *f3)
{
if (f1 == NULL) fseek64(gsi->gsifp, GSI64_KEYSIZE, SEEK_CUR);
else if (! fread(f1, GSI64_KEYSIZE, 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
if (f2 == NULL) fseek64(gsi->gsifp, sizeof(sqd_uint16), SEEK_CUR);
else if (! fread(f2, sizeof(sqd_uint16), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
if (f3 == NULL) fseek64(gsi->gsifp, sizeof(sqd_uint64), SEEK_CUR);
else if (! fread(f3, sizeof(sqd_uint64), 1, gsi->gsifp))
{ squid_errno = SQERR_NODATA; return 0; }
#if 0 /* no byteswap yet! HACK! */
if (f2 != NULL) *f2 = sre_ntohs(*f2);
if (f3 != NULL) *f3 = sre_ntohl(*f3);
#endif
return 1;
}