php-src/ext/dba/dba_flatfile.c

/*
   +----------------------------------------------------------------------+
   | 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.               |
   +----------------------------------------------------------------------+
   | Author: Marcus Boerger <helly@php.net>                               |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"

#if DBA_FLATFILE
#include "php_flatfile.h"

#include "libflatfile/flatfile.h"

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define FLATFILE_DATA flatfile *dba = info->dbf
#define FLATFILE_GKEY datum gkey; gkey.dptr = (char *) key; gkey.dsize = keylen

DBA_OPEN_FUNC(flatfile)
{
	char *fmode;
	php_stream *fp;

	info->dbf = emalloc(sizeof(flatfile));
	memset(info->dbf, 0, sizeof(flatfile));

	switch(info->mode) {
		case DBA_READER:
			fmode = "r";
			break;
		case DBA_WRITER:
			fmode = "r+b";
			break;
		case DBA_CREAT:
			fmode = "a+b";
			break;
		case DBA_TRUNC:
			fmode = "w+b";
			break;
		default:
			efree(info->dbf);
			return FAILURE; /* not possible */
	}

	fp = php_stream_open_wrapper(info->path, fmode, STREAM_MUST_SEEK|IGNORE_PATH|ENFORCE_SAFE_MODE, NULL);
	if (!fp) {
		*error = "Unable to open file";
		efree(info->dbf);
		return FAILURE;
	}

	((flatfile*)info->dbf)->fp = fp;

	return SUCCESS;
}

DBA_CLOSE_FUNC(flatfile)
{
	FLATFILE_DATA;

	php_stream_close(dba->fp);
	if (dba->nextkey.dptr)
		efree(dba->nextkey.dptr);
	efree(dba);
}

DBA_FETCH_FUNC(flatfile)
{
	datum gval;
	char *new = NULL;

	FLATFILE_DATA;
	FLATFILE_GKEY;

	gval = flatfile_fetch(dba, gkey TSRMLS_CC);
	if(gval.dptr) {
		if(newlen) *newlen = gval.dsize;
		new = estrndup(gval.dptr, gval.dsize);
		efree(gval.dptr);
	}
	return new;
}

DBA_UPDATE_FUNC(flatfile)
{
	datum gval;

	FLATFILE_DATA;
	FLATFILE_GKEY;
	gval.dptr = (char *) val;
	gval.dsize = vallen;
	
	switch(flatfile_store(dba, gkey, gval, mode==1 ? FLATFILE_INSERT : FLATFILE_REPLACE TSRMLS_CC)) {
	case -1:
		php_error_docref1(NULL TSRMLS_CC, key, E_WARNING, "Operation not possible");
		return FAILURE;
	default:
	case 0:
		return SUCCESS;
	case 1:
		php_error_docref1(NULL TSRMLS_CC, key, E_WARNING, "Key already exists");
		return SUCCESS;
	}
}

DBA_EXISTS_FUNC(flatfile)
{
	datum gval;
	FLATFILE_DATA;
	FLATFILE_GKEY;
	
	gval = flatfile_fetch(dba, gkey TSRMLS_CC);
	if(gval.dptr) {
		efree(gval.dptr);
		return SUCCESS;
	}
	return FAILURE;
}

DBA_DELETE_FUNC(flatfile)
{
	FLATFILE_DATA;
	FLATFILE_GKEY;
	return(flatfile_delete(dba, gkey TSRMLS_CC) == -1 ? FAILURE : SUCCESS);
}

DBA_FIRSTKEY_FUNC(flatfile)
{
	FLATFILE_DATA;

	if (dba->nextkey.dptr)
		efree(dba->nextkey.dptr);
	dba->nextkey = flatfile_firstkey(dba TSRMLS_CC);
	if(dba->nextkey.dptr) {
		if(newlen) 
			*newlen = dba->nextkey.dsize;
		return estrndup(dba->nextkey.dptr, dba->nextkey.dsize);
	}
	return NULL;
}

DBA_NEXTKEY_FUNC(flatfile)
{
	FLATFILE_DATA;
	
	if(!dba->nextkey.dptr) 
		return NULL;
	
	if (dba->nextkey.dptr)
		efree(dba->nextkey.dptr);
	dba->nextkey = flatfile_nextkey(dba TSRMLS_CC);
	if(dba->nextkey.dptr) {
		if(newlen) 
			*newlen = dba->nextkey.dsize;
		return estrndup(dba->nextkey.dptr, dba->nextkey.dsize);
	}
	return NULL;
}

DBA_OPTIMIZE_FUNC(flatfile)
{
	/* dummy */
	return SUCCESS;
}

DBA_SYNC_FUNC(flatfile)
{
	/* dummy */
	return SUCCESS;
}

#endif

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