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c12d4bc7d4
php-src/ext/db/db.c
Zeev Suraski c12d4bc7d4 *** empty log message ***
1999-09-04 13:18:59 +00:00

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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_0.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@lerdorf.on.ca> |
| Jim Winstead <jimw@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define IS_EXT_MODULE
#if COMPILE_DL
#ifdef PHP_31
# include "../phpdl.h"
#else
# ifdef THREAD_SAFE
# undef THREAD_SAFE
# endif
# include "dl/phpdl.h"
#endif
#endif
#if 0
#include "php.h"
#include "php_globals.h"
#include "safe_mode.h"
#include "fopen-wrappers.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef PHP_31
#include "os/nt/flock.h"
#else
#if WIN32|WINNT
#include "win32/flock.h"
#else
#include <sys/file.h>
#endif
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if GDBM
#include <gdbm.h>
#define DBM_TYPE GDBM_FILE
#define DBM_MODE_TYPE int
#define DBM_WRITE_MODE GDBM_WRITER
#define DBM_CREATE_MODE GDBM_WRCREAT
#define DBM_NEW_MODE GDBM_NEWDB
#define DBM_DEFAULT_MODE GDBM_READER
#define DBM_OPEN(filename, mode) gdbm_open(filename, 512, mode, 0666, 0)
#define DBM_CLOSE(dbf) gdbm_close(dbf)
#define DBM_STORE(dbf, key, value, mode) gdbm_store(dbf, key, value, mode)
#define DBM_FETCH(dbf, key) gdbm_fetch(dbf, key)
#define DBM_EXISTS(dbf, key) gdbm_exists(dbf, key)
#define DBM_DELETE(dbf, key) gdbm_delete(dbf, key)
#define DBM_FIRSTKEY(dbf) gdbm_firstkey(dbf)
#define DBM_NEXTKEY(dbf, key) gdbm_nextkey(dbf, key)
#define DBM_INSERT GDBM_INSERT
#define DBM_REPLACE GDBM_REPLACE
#endif
#if NDBM && !GDBM
#if BSD2
#define DB_DBM_HSEARCH 1
#include <db.h>
#else
#include <ndbm.h>
#endif
#define DBM_TYPE DBM *
#define DBM_MODE_TYPE int
#define DBM_WRITE_MODE O_RDWR
#define DBM_CREATE_MODE O_RDWR | O_APPEND | O_CREAT
#define DBM_NEW_MODE O_RDWR | O_CREAT | O_TRUNC
#define DBM_DEFAULT_MODE O_RDONLY
#define DBM_OPEN(filename, mode) dbm_open(filename, mode, 0666)
#define DBM_CLOSE(dbf) dbm_close(dbf)
#define DBM_STORE(dbf, key, value, mode) dbm_store(dbf, key, value, mode)
#define DBM_FETCH(dbf, key) dbm_fetch(dbf, key)
#define DBM_EXISTS(dbf, key) _php3_dbm_exists(dbf, key)
#define DBM_DELETE(dbf, key) dbm_delete(dbf, key)
#define DBM_FIRSTKEY(dbf) dbm_firstkey(dbf)
#define DBM_NEXTKEY(dbf, key) dbm_nextkey(dbf)
static int _php3_dbm_exists(DBM *dbf, datum key_datum) {
datum value_datum;
int ret;
value_datum = dbm_fetch(dbf, key_datum);
if (value_datum.dptr)
ret = 1;
else
ret = 0;
return ret;
}
#endif
#if !NDBM && !GDBM
#define DBM_TYPE FILE *
#define DBM_MODE_TYPE char *
#define DBM_WRITE_MODE "r+b"
#define DBM_CREATE_MODE "a+b"
#define DBM_NEW_MODE "w+b"
#define DBM_DEFAULT_MODE "r"
#define DBM_OPEN(filename, mode) fopen(filename, mode)
#define DBM_CLOSE(dbf) fclose(dbf)
#define DBM_STORE(dbf, key, value, mode) flatfile_store(dbf, key, value, mode)
#define DBM_FETCH(dbf, key) flatfile_fetch(dbf, key)
#define DBM_EXISTS(dbf, key) flatfile_findkey(dbf, key)
#define DBM_DELETE(dbf, key) flatfile_delete(dbf, key)
#define DBM_FIRSTKEY(dbf) flatfile_firstkey(dbf)
#define DBM_NEXTKEY(dbf, key) flatfile_nextkey(dbf)
#define DBM_INSERT 0
#define DBM_REPLACE 1
typedef struct {
char *dptr;
int dsize;
} datum;
int flatfile_store(FILE *dbf, datum key, datum value, int mode);
datum flatfile_fetch(FILE *dbf, datum key);
int flatfile_findkey(FILE *dbf, datum key);
int flatfile_delete(FILE *dbf, datum key);
datum flatfile_firstkey(FILE *dbf);
datum flatfile_nextkey(FILE *dbf);
#endif
#include "php3_db.h"
#include "ext/standard/php3_string.h"
#if THREAD_SAFE
DWORD DbmTls;
static int numthreads=0;
typedef struct dbm_global_struct{
int le_db;
}dbm_global_struct;
#define DBM_GLOBAL(a) dbm_globals->a
#define DBM_TLS_VARS dbm_global_struct *dbm_globals = TlsGetValue(DbmTls);
#else
static int le_db;
#define DBM_GLOBAL(a) a
#define DBM_TLS_VARS
#endif
/*needed for blocking calls in windows*/
void *dbm_mutex;
dbm_info *_php3_finddbm(pval *id,HashTable *list)
{
list_entry *le;
dbm_info *info;
int numitems, i;
int info_type;
DBM_TLS_VARS;
if (id->type == IS_STRING) {
numitems = zend_hash_num_elements(list);
for (i=1; i<=numitems; i++) {
if (zend_hash_index_find(list, i, (void **) &le)==FAILURE) {
continue;
}
if (le->type == DBM_GLOBAL(le_db)) {
info = (dbm_info *)(le->ptr);
if (!strcmp(info->filename, id->value.str.val)) {
return (dbm_info *)(le->ptr);
}
}
}
}
/* didn't find it as a database filename, try as a number */
convert_to_long(id);
info = php3_list_find(id->value.lval, &info_type);
if (info_type != DBM_GLOBAL(le_db))
return NULL;
return info;
}
static char *php3_get_info_db(void)
{
static char temp1[128];
static char temp[256];
temp1[0]='\0';
temp[0]='\0';
#ifdef DB_VERSION_STRING /* using sleepycat dbm */
strcat(temp,DB_VERSION_STRING);
#endif
#if GDBM
sprintf(temp1,"%s",gdbm_version);
strcat(temp,temp1);
#endif
#if NDBM && !GDBM
strcat(temp,"ndbm support enabled");
#endif
#if !GDBM && !NDBM
strcat(temp,"flat file support enabled");
#endif
#if NFS_HACK
strcat(temp,"NFS hack in effect");
#endif
if (!*temp)
strcat(temp,"No database support");
return temp;
}
PHP_MINFO_FUNCTION(db)
{
php_printf(php3_get_info_db());
}
PHP_FUNCTION(dblist)
{
char *str = php3_get_info_db();
RETURN_STRING(str,1);
}
PHP_FUNCTION(dbmopen) {
pval *filename, *mode;
dbm_info *info=NULL;
int ret;
DBM_TLS_VARS;
if (ARG_COUNT(ht)!=2 || getParameters(ht,2,&filename,&mode)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(filename);
convert_to_string(mode);
info = _php3_dbmopen(filename->value.str.val, mode->value.str.val);
if (info) {
ret = php3_list_insert(info, DBM_GLOBAL(le_db));
RETURN_LONG(ret);
} else {
RETURN_FALSE;
}
}
dbm_info *_php3_dbmopen(char *filename, char *mode) {
dbm_info *info;
int ret, lock=0;
char *lockfn = NULL;
int lockfd = 0;
#if NFS_HACK
int last_try = 0;
struct stat sb;
int retries = 0;
#endif
DBM_TYPE dbf=NULL;
DBM_MODE_TYPE imode;
if (filename == NULL) {
php_error(E_WARNING, "NULL filename passed to _php3_dbmopen()");
return NULL;
}
if (PG(safe_mode) && (!_php3_checkuid(filename, 2))) {
return NULL;
}
if (_php3_check_open_basedir(filename)) {
return NULL;
}
switch (*mode) {
case 'w':
imode = DBM_WRITE_MODE;
lock = 1;
break;
case 'c':
imode = DBM_CREATE_MODE;
lock = 1;
break;
case 'n':
imode = DBM_NEW_MODE;
lock = 1;
break;
default:
imode = DBM_DEFAULT_MODE;
lock = 0;
break;
}
if (lock) {
lockfn = emalloc(strlen(filename) + 5);
strcpy(lockfn, filename);
strcat(lockfn, ".lck");
#if NFS_HACK
while((last_try = stat(lockfn,&sb))==0) {
retries++;
sleep(1);
if (retries>30) break;
}
if (last_try!=0) {
lockfd = open(lockfn,O_RDWR|O_CREAT,0644);
close(lockfd);
} else {
php_error(E_WARNING, "File appears to be locked [%s]\n",lockfn);
return -1;
}
#else /* NFS_HACK */
lockfd = open(lockfn,O_RDWR|O_CREAT,0644);
if (lockfd) {
flock(lockfd,LOCK_EX);
close(lockfd);
} else {
php_error(E_WARNING, "Unable to establish lock: %s",filename);
}
#endif /* else NFS_HACK */
}
dbf = DBM_OPEN(filename, imode);
#if !NDBM && !GDBM
if (dbf) {
setvbuf(dbf, NULL, _IONBF, 0);
}
#endif
if (dbf) {
info = (dbm_info *)emalloc(sizeof(dbm_info));
if (!info) {
php_error(E_ERROR, "problem allocating memory!");
return NULL;
}
info->filename = estrdup(filename);
info->lockfn = lockfn;
info->lockfd = lockfd;
info->dbf = dbf;
return info;
} else {
#if GDBM
php_error(E_WARNING, "dbmopen_gdbm(%s): %d [%s], %d [%s]",filename,gdbm_errno,gdbm_strerror(gdbm_errno),errno,strerror(errno));
if (gdbm_errno)
ret = gdbm_errno;
else if (errno)
ret = errno;
else
ret = -1;
#else
#if NDBM
#if DEBUG
php_error(E_WARNING, "dbmopen_ndbm(%s): errno = %d [%s]\n",filename,errno,strerror(errno));
#endif
if (errno) ret=errno;
else ret = -1;
#else
#if DEBUG
php_error(E_WARNING, "dbmopen_flatfile(%s): errno = %d [%s]\n",filename,errno,strerror(errno));
#endif
if (errno) ret=errno;
else ret = -1;
#endif
#endif
#if NFS_HACK
if (lockfn) {
unlink(lockfn);
}
#endif
if (lockfn) efree(lockfn);
}
return NULL;
}
PHP_FUNCTION(dbmclose) {
pval *id;
if (ARG_COUNT(ht) != 1 || getParameters(ht,1,&id)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long(id);
if (php3_list_delete(id->value.lval) == SUCCESS) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
int _php3_dbmclose(dbm_info *info) {
int ret = 0;
DBM_TYPE dbf;
int lockfd;
dbf = info->dbf;
#if NFS_HACK
unlink(info->lockfn);
#else
if (info->lockfn) {
lockfd = open(info->lockfn,O_RDWR,0644);
flock(lockfd,LOCK_UN);
close(lockfd);
}
#endif
if (dbf)
DBM_CLOSE(dbf);
/* free the memory used by the dbm_info struct */
if (info->filename) efree(info->filename);
if (info->lockfn) efree(info->lockfn);
efree(info);
return(ret);
}
/*
* ret = -1 means that database was opened for read-only
* ret = 0 success
* ret = 1 key already exists - nothing done
*/
PHP_FUNCTION(dbminsert)
{
pval *id, *key, *value;
dbm_info *info;
int ret;
if (ARG_COUNT(ht)!=3||getParameters(ht,3,&id,&key,&value) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
convert_to_string(value);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbminsert(info, key->value.str.val, value->value.str.val);
RETURN_LONG(ret);
}
int _php3_dbminsert(dbm_info *info, char *key, char *value) {
datum key_datum, value_datum;
int ret;
DBM_TYPE dbf;
php_stripslashes(key,NULL);
php_stripslashes(value,NULL);
value_datum.dptr = estrdup(value);
value_datum.dsize = strlen(value);
key_datum.dptr = estrdup(key);
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return 1;
}
ret = DBM_STORE(dbf, key_datum, value_datum, DBM_INSERT);
/* free the memory */
efree(key_datum.dptr); efree(value_datum.dptr);
return(ret);
}
PHP_FUNCTION(dbmreplace)
{
pval *id, *key, *value;
dbm_info *info;
int ret;
if (ARG_COUNT(ht)!=3||getParameters(ht,3,&id,&key,&value) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
convert_to_string(value);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbmreplace(info, key->value.str.val, value->value.str.val);
RETURN_LONG(ret);
}
int _php3_dbmreplace(dbm_info *info, char *key, char *value) {
DBM_TYPE dbf;
int ret;
datum key_datum, value_datum;
PLS_FETCH();
if (PG(magic_quotes_runtime)) {
php_stripslashes(key,NULL);
php_stripslashes(value,NULL);
}
value_datum.dptr = estrdup(value);
value_datum.dsize = strlen(value);
key_datum.dptr = estrdup(key);
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return 1;
}
ret = DBM_STORE(dbf, key_datum, value_datum, DBM_REPLACE);
/* free the memory */
efree(key_datum.dptr); efree(value_datum.dptr);
return(ret);
}
PHP_FUNCTION(dbmfetch)
{
pval *id, *key;
dbm_info *info;
if (ARG_COUNT(ht)!=2||getParameters(ht,2,&id,&key)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
return_value->value.str.val = _php3_dbmfetch(info, key->value.str.val);
if (return_value->value.str.val) {
return_value->value.str.len = strlen(return_value->value.str.val);
return_value->type = IS_STRING;
} else {
RETURN_FALSE;
}
}
char *_php3_dbmfetch(dbm_info *info, char *key) {
datum key_datum, value_datum;
char *ret;
DBM_TYPE dbf;
PLS_FETCH();
key_datum.dptr = key;
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
value_datum.dptr = NULL;
value_datum.dsize = 0;
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return(NULL);
}
value_datum = DBM_FETCH(dbf, key_datum);
if (value_datum.dptr) {
ret = (char *)emalloc(sizeof(char) * value_datum.dsize + 1);
strncpy(ret, value_datum.dptr, value_datum.dsize);
ret[value_datum.dsize] = '\0';
#if GDBM
/* all but NDBM use malloc to allocate the content blocks, so we need to free it */
free(value_datum.dptr);
#else
# if !NDBM
efree(value_datum.dptr);
# endif
#endif
}
else
ret = NULL;
if (ret && PG(magic_quotes_runtime)) {
ret = php_addslashes(ret, value_datum.dsize, NULL, 1);
}
return(ret);
}
PHP_FUNCTION(dbmexists)
{
pval *id, *key;
dbm_info *info;
int ret;
if (ARG_COUNT(ht)!=2||getParameters(ht,2,&id,&key)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbmexists(info, key->value.str.val);
RETURN_LONG(ret);
}
int _php3_dbmexists(dbm_info *info, char *key) {
datum key_datum;
int ret;
DBM_TYPE dbf;
key_datum.dptr = key;
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return(0);
}
ret = DBM_EXISTS(dbf, key_datum);
return(ret);
}
PHP_FUNCTION(dbmdelete)
{
pval *id, *key;
dbm_info *info;
int ret;
if (ARG_COUNT(ht)!=2||getParameters(ht,2,&id,&key)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbmdelete(info, key->value.str.val);
RETURN_LONG(ret);
}
int _php3_dbmdelete(dbm_info *info, char *key) {
datum key_datum;
int ret;
DBM_TYPE dbf;
key_datum.dptr = key;
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return(0);
}
ret = DBM_DELETE(dbf, key_datum);
return(ret);
}
PHP_FUNCTION(dbmfirstkey)
{
pval *id;
dbm_info *info;
char *ret;
if (ARG_COUNT(ht)!=1||getParameters(ht,1,&id)==FAILURE) {
WRONG_PARAM_COUNT;
}
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbmfirstkey(info);
if (!ret) {
RETURN_FALSE;
} else {
return_value->value.str.val = ret;
return_value->value.str.len = strlen(ret);
return_value->type = IS_STRING;
}
}
char *_php3_dbmfirstkey(dbm_info *info) {
datum ret_datum;
char *ret;
DBM_TYPE dbf;
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return(NULL);
}
/* explicitly zero-out ret_datum */
ret_datum.dptr = NULL;
ret_datum.dsize = 0;
ret_datum = DBM_FIRSTKEY(dbf);
if (!ret_datum.dptr)
return NULL;
ret = (char *)emalloc((ret_datum.dsize + 1) * sizeof(char));
strncpy(ret, ret_datum.dptr, ret_datum.dsize);
ret[ret_datum.dsize] = '\0';
#if !NDBM & !GDBM
efree(ret_datum.dptr);
#endif
return (ret);
}
PHP_FUNCTION(dbmnextkey)
{
pval *id, *key;
dbm_info *info;
char *ret;
if (ARG_COUNT(ht)!=2||getParameters(ht,2,&id,&key)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(key);
info = _php3_finddbm(id,list);
if (!info) {
php_error(E_WARNING, "not a valid database identifier %d", id->value.lval);
RETURN_FALSE;
}
ret = _php3_dbmnextkey(info, key->value.str.val);
if (!ret) {
RETURN_FALSE;
} else {
return_value->value.str.val = ret;
return_value->value.str.len = strlen(ret);
return_value->type = IS_STRING;
}
}
char *_php3_dbmnextkey(dbm_info *info, char *key) {
datum key_datum, ret_datum;
char *ret;
DBM_TYPE dbf;
PLS_FETCH();
key_datum.dptr = key;
key_datum.dsize = strlen(key);
#if GDBM_FIX
key_datum.dsize++;
#endif
dbf = info->dbf;
if (!dbf) {
php_error(E_WARNING, "Unable to locate dbm file");
return(NULL);
}
/* explicitly zero-out ret_datum */
ret_datum.dptr = NULL;
ret_datum.dsize = 0;
ret_datum = DBM_NEXTKEY(dbf, key_datum);
if (ret_datum.dptr) {
ret = (char *)emalloc(sizeof(char) * ret_datum.dsize + 1);
strncpy(ret, ret_datum.dptr, ret_datum.dsize);
ret[ret_datum.dsize] = '\0';
#if GDBM
/* GDBM uses malloc to allocate the value_datum block, so we need to free it */
free(ret_datum.dptr);
#else
# if !NDBM
efree(ret_datum.dptr);
# endif
#endif
}
else ret=NULL;
if (ret && PG(magic_quotes_runtime)) {
ret = php_addslashes(ret, ret_datum.dsize, NULL, 1);
}
return(ret);
}
#if !GDBM && !NDBM
static long CurrentFlatFilePos = 0L;
int flatfile_store(FILE *dbf, datum key_datum, datum value_datum, int mode) {
int ret;
if (mode == DBM_INSERT) {
if (flatfile_findkey(dbf, key_datum)) {
return 1;
}
fseek(dbf,0L,SEEK_END);
fprintf(dbf,"%d\n",key_datum.dsize);
fflush(dbf);
ret = write(fileno(dbf),key_datum.dptr,key_datum.dsize);
fprintf(dbf,"%d\n",value_datum.dsize);
fflush(dbf);
ret = write(fileno(dbf),value_datum.dptr,value_datum.dsize);
} else { /* DBM_REPLACE */
flatfile_delete(dbf,key_datum);
fprintf(dbf,"%d\n",key_datum.dsize);
fflush(dbf);
ret = write(fileno(dbf),key_datum.dptr,key_datum.dsize);
fprintf(dbf,"%d\n",value_datum.dsize);
ret = write(fileno(dbf),value_datum.dptr,value_datum.dsize);
}
if (ret>0)
ret=0;
return ret;
}
datum flatfile_fetch(FILE *dbf, datum key_datum) {
datum value_datum = {NULL, 0};
int num=0, buf_size=1024;
char *buf;
if (flatfile_findkey(dbf,key_datum)) {
buf = emalloc((buf_size+1) * sizeof(char));
if (fgets(buf, 15, dbf)) {
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
buf = emalloc((buf_size+1)*sizeof(char));
}
read(fileno(dbf),buf,num);
value_datum.dptr = buf;
value_datum.dsize = num;
}
}
return value_datum;
}
int flatfile_delete(FILE *dbf, datum key_datum) {
char *key = key_datum.dptr;
int size = key_datum.dsize;
char *buf;
int num, buf_size = 1024;
long pos;
rewind(dbf);
buf = emalloc((buf_size + 1)*sizeof(char));
while(!feof(dbf)) {
/* read in the length of the key name */
if (!fgets(buf, 15, dbf))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size += num;
if (buf) efree(buf);
buf = emalloc((buf_size+1)*sizeof(char));
}
pos = ftell(dbf);
/* read in the key name */
num = fread(buf, sizeof(char), num, dbf);
if (num<0) break;
*(buf+num) = '\0';
if (size == num && !memcmp(buf, key, size)) {
fseek(dbf, pos, SEEK_SET);
fputc(0, dbf);
fflush(dbf);
fseek(dbf, 0L, SEEK_END);
if (buf) efree(buf);
return SUCCESS;
}
/* read in the length of the value */
if (!fgets(buf,15,dbf))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
if (buf) efree(buf);
buf = emalloc((buf_size+1)*sizeof(char));
}
/* read in the value */
num = fread(buf, sizeof(char), num, dbf);
if (num<0)
break;
}
if (buf) efree(buf);
return FAILURE;
}
int flatfile_findkey(FILE *dbf, datum key_datum) {
char *buf = NULL;
int num;
int buf_size=1024;
int ret=0;
void *key = key_datum.dptr;
int size = key_datum.dsize;
rewind(dbf);
buf = emalloc((buf_size+1)*sizeof(char));
while (!feof(dbf)) {
if (!fgets(buf,15,dbf)) break;
num = atoi(buf);
if (num > buf_size) {
if (buf) efree(buf);
buf_size+=num;
buf = emalloc((buf_size+1)*sizeof(char));
}
num = fread(buf, sizeof(char), num, dbf);
if (num<0) break;
*(buf+num) = '\0';
if (size == num) {
if (!memcmp(buf,key,size)) {
ret = 1;
break;
}
}
if (!fgets(buf,15,dbf))
break;
num = atoi(buf);
if (num > buf_size) {
if (buf) efree(buf);
buf_size+=num;
buf = emalloc((buf_size+1)*sizeof(char));
}
num = fread(buf, sizeof(char), num, dbf);
if (num<0) break;
*(buf+num) = '\0';
}
if (buf) efree(buf);
return(ret);
}
datum flatfile_firstkey(FILE *dbf) {
datum buf;
int num;
int buf_size=1024;
rewind(dbf);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
while(!feof(dbf)) {
if (!fgets(buf.dptr,15,dbf)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
if (buf.dptr) efree(buf.dptr);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
}
num=read(fileno(dbf),buf.dptr,num);
if (num<0) break;
buf.dsize = num;
if (*(buf.dptr)!=0) {
CurrentFlatFilePos = ftell(dbf);
return(buf);
}
if (!fgets(buf.dptr,15,dbf)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
if (buf.dptr) efree(buf.dptr);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
}
num=read(fileno(dbf),buf.dptr,num);
if (num<0) break;
}
if (buf.dptr) efree(buf.dptr);
buf.dptr = NULL;
return(buf);
}
datum flatfile_nextkey(FILE *dbf) {
datum buf;
int num;
int buf_size=1024;
fseek(dbf,CurrentFlatFilePos,SEEK_SET);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
while(!feof(dbf)) {
if (!fgets(buf.dptr,15,dbf)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
if (buf.dptr) efree(buf.dptr);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
}
num=read(fileno(dbf),buf.dptr,num);
if (num<0) break;
if (!fgets(buf.dptr,15,dbf)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
if (buf.dptr) efree(buf.dptr);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
}
num=read(fileno(dbf),buf.dptr,num);
if (num<0) break;
buf.dsize = num;
if (*(buf.dptr)!=0) {
CurrentFlatFilePos = ftell(dbf);
return(buf);
}
}
if (buf.dptr) efree(buf.dptr);
buf.dptr = NULL;
return(buf);
}
#endif
PHP_MINIT_FUNCTION(db)
{
#if defined(THREAD_SAFE)
dbm_global_struct *dbm_globals;
PHP3_MUTEX_ALLOC(dbm_mutex);
PHP3_MUTEX_LOCK(dbm_mutex);
numthreads++;
if (numthreads==1){
if (!PHP3_TLS_PROC_STARTUP(DbmTls)){
PHP3_MUTEX_UNLOCK(dbm_mutex);
PHP3_MUTEX_FREE(dbm_mutex);
return FAILURE;
}
}
PHP3_MUTEX_UNLOCK(dbm_mutex);
if(!PHP3_TLS_THREAD_INIT(DbmTls,dbm_globals,dbm_global_struct)){
PHP3_MUTEX_FREE(dbm_mutex);
return FAILURE;
}
#endif
DBM_GLOBAL(le_db) = register_list_destructors(_php3_dbmclose,NULL);
return SUCCESS;
}
static PHP_MSHUTDOWN_FUNCTION(db)
{
DBM_TLS_VARS;
#ifdef THREAD_SAFE
PHP3_TLS_THREAD_FREE(dbm_globals);
PHP3_MUTEX_LOCK(dbm_mutex);
numthreads--;
if (numthreads<1) {
PHP3_TLS_PROC_SHUTDOWN(DbmTls);
PHP3_MUTEX_UNLOCK(dbm_mutex);
PHP3_MUTEX_FREE(dbm_mutex);
return SUCCESS;
}
PHP3_MUTEX_UNLOCK(dbm_mutex);
#endif
return SUCCESS;
}
PHP_RINIT_FUNCTION(db)
{
#if !GDBM && !NDBM
CurrentFlatFilePos = 0L;
#endif
return SUCCESS;
}
function_entry dbm_functions[] = {
PHP_FE(dblist, NULL)
PHP_FE(dbmopen, NULL)
PHP_FE(dbmclose, NULL)
PHP_FE(dbminsert, NULL)
PHP_FE(dbmfetch, NULL)
PHP_FE(dbmreplace, NULL)
PHP_FE(dbmexists, NULL)
PHP_FE(dbmdelete, NULL)
PHP_FE(dbmfirstkey, NULL)
PHP_FE(dbmnextkey, NULL)
{NULL,NULL,NULL}
};
php3_module_entry dbm_module_entry = {
"DBM", dbm_functions, PHP_MINIT(db), PHP_MSHUTDOWN(db), PHP_RINIT(db), NULL, PHP_MINFO(db), STANDARD_MODULE_PROPERTIES
};
#if COMPILE_DL
DLEXPORT php3_module_entry *get_module(void) { return &dbm_module_entry; }
#endif
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
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