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|
/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 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_02.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: Marcus Boerger <helly@php.net> |
| based on ext/db/db.c by: |
| Rasmus Lerdorf <rasmus@php.net> |
| Jim Winstead <jimw@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_globals.h"
#include "safe_mode.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "flatfile.h"
/*
* ret = -1 means that database was opened for read-only
* ret = 0 success
* ret = 1 key already exists - nothing done
*/
/* {{{ flatfile_store
*/
PHPAPI int flatfile_store(flatfile *dba, datum key_datum, datum value_datum, int mode TSRMLS_DC) {
if (mode == FLATFILE_INSERT) {
if (flatfile_findkey(dba, key_datum TSRMLS_CC)) {
return 1;
}
php_stream_seek(dba->fp, 0L, SEEK_END);
php_stream_printf(dba->fp TSRMLS_CC, "%d\n", key_datum.dsize);
php_stream_flush(dba->fp);
if (php_stream_write(dba->fp, key_datum.dptr, key_datum.dsize) < key_datum.dsize)
return -1;
php_stream_printf(dba->fp TSRMLS_CC, "%d\n", value_datum.dsize);
php_stream_flush(dba->fp);
if (php_stream_write(dba->fp, value_datum.dptr, value_datum.dsize) < value_datum.dsize)
return -1;
} else { /* DBM_REPLACE */
flatfile_delete(dba, key_datum TSRMLS_CC);
php_stream_printf(dba->fp TSRMLS_CC, "%d\n", key_datum.dsize);
php_stream_flush(dba->fp);
if (php_stream_write(dba->fp, key_datum.dptr, key_datum.dsize) < key_datum.dsize)
return -1;
php_stream_printf(dba->fp TSRMLS_CC, "%d\n", value_datum.dsize);
if (php_stream_write(dba->fp, value_datum.dptr, value_datum.dsize) < value_datum.dsize)
return -1;
}
php_stream_flush(dba->fp);
return 0;
}
/* }}} */
/* {{{ flatfile_fetch
*/
PHPAPI datum flatfile_fetch(flatfile *dba, datum key_datum TSRMLS_DC) {
datum value_datum = {NULL, 0};
size_t num=0;
size_t buf_size = 1024;
char *buf;
if (flatfile_findkey(dba, key_datum TSRMLS_CC)) {
buf = emalloc((buf_size+1) * sizeof(char));
if (php_stream_gets(dba->fp, buf, 15)) {
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
buf = erealloc(buf, (buf_size+1)*sizeof(char));
}
php_stream_read(dba->fp, buf, num);
value_datum.dptr = buf;
value_datum.dsize = num;
} else {
value_datum.dptr = NULL;
value_datum.dsize = 0;
efree(buf);
}
}
return value_datum;
}
/* }}} */
/* {{{ flatfile_delete
*/
PHPAPI int flatfile_delete(flatfile *dba, datum key_datum TSRMLS_DC) {
char *key = key_datum.dptr;
size_t size = key_datum.dsize;
char *buf;
size_t num;
size_t buf_size = 1024;
size_t pos;
php_stream_rewind(dba->fp);
buf = emalloc((buf_size + 1)*sizeof(char));
while(!php_stream_eof(dba->fp)) {
/* read in the length of the key name */
if (!php_stream_gets(dba->fp, buf, 15))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size += num;
buf = erealloc(buf, (buf_size+1)*sizeof(char));
}
pos = php_stream_tell(dba->fp);
/* read in the key name */
num = php_stream_read(dba->fp, buf, sizeof(char)*num);
if (num<0)
break;
*(buf+num) = '\0';
if (size == num && !memcmp(buf, key, size)) {
php_stream_seek(dba->fp, pos, SEEK_SET);
php_stream_putc(dba->fp, 0);
php_stream_flush(dba->fp);
php_stream_seek(dba->fp, 0L, SEEK_END);
if (buf)
efree(buf);
return SUCCESS;
}
/* read in the length of the value */
if (!php_stream_gets(dba->fp, buf, 15))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
buf = erealloc(buf, (buf_size+1)*sizeof(char));
}
/* read in the value */
num = php_stream_read(dba->fp, buf, sizeof(char)*num);
if (num<0)
break;
}
if (buf)
efree(buf);
return FAILURE;
}
/* }}} */
/* {{{ flatfile_findkey
*/
PHPAPI int flatfile_findkey(flatfile *dba, datum key_datum TSRMLS_DC) {
char *buf = NULL;
size_t num;
size_t buf_size = 1024;
int ret=0;
void *key = key_datum.dptr;
size_t size = key_datum.dsize;
php_stream_rewind(dba->fp);
buf = emalloc((buf_size+1)*sizeof(char));
while (!php_stream_eof(dba->fp)) {
if (!php_stream_gets(dba->fp, buf, 15))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
buf = erealloc(buf, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf, sizeof(char)*num);
if (num<0) break;
*(buf+num) = '\0';
if (size == num) {
if (!memcmp(buf, key, size)) {
ret = 1;
break;
}
}
if (!php_stream_gets(dba->fp, buf, 15))
break;
num = atoi(buf);
if (num > buf_size) {
buf_size+=num;
buf = erealloc(buf, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf, sizeof(char)*num);
if (num<0)
break;
*(buf+num) = '\0';
}
if (buf)
efree(buf);
return(ret);
}
/* }}} */
/* {{{ flatfile_firstkey
*/
PHPAPI datum flatfile_firstkey(flatfile *dba TSRMLS_DC) {
datum buf;
size_t num;
size_t buf_size = 1024;
php_stream_rewind(dba->fp);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
while(!php_stream_eof(dba->fp)) {
if (!php_stream_gets(dba->fp, buf.dptr, 15)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
buf.dptr = erealloc(buf.dptr, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf.dptr, num);
if (num<0)
break;
buf.dsize = num;
if (*(buf.dptr)!=0) {
dba->CurrentFlatFilePos = php_stream_tell(dba->fp);
return(buf);
}
if (!php_stream_gets(dba->fp, buf.dptr, 15)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
buf.dptr = erealloc(buf.dptr, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf.dptr, num);
if (num<0)
break;
}
if (buf.dptr)
efree(buf.dptr);
buf.dptr = NULL;
return(buf);
}
/* }}} */
/* {{{ flatfile_nextkey
*/
PHPAPI datum flatfile_nextkey(flatfile *dba TSRMLS_DC) {
datum buf;
size_t num;
size_t buf_size = 1024;
php_stream_seek(dba->fp, dba->CurrentFlatFilePos, SEEK_SET);
buf.dptr = emalloc((buf_size+1)*sizeof(char));
while(!php_stream_eof(dba->fp)) {
if (!php_stream_gets(dba->fp, buf.dptr, 15)) break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
buf.dptr = erealloc(buf.dptr, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf.dptr, num);
if (num<0)
break;
if (!php_stream_gets(dba->fp, buf.dptr, 15))
break;
num = atoi(buf.dptr);
if (num > buf_size) {
buf_size+=num;
buf.dptr = erealloc(buf.dptr, (buf_size+1)*sizeof(char));
}
num = php_stream_read(dba->fp, buf.dptr, num);
if (num<0)
break;
buf.dsize = num;
if (*(buf.dptr)!=0) {
dba->CurrentFlatFilePos = php_stream_tell(dba->fp);
return(buf);
}
}
if (buf.dptr)
efree(buf.dptr);
buf.dptr = NULL;
return(buf);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
