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/***************************************************************************
* filespace.c -- a simple mechanism for storing dynamic amounts of data *
* in a simple to use, and quick to append-to structure. *
* *
***********************IMPORTANT NSOCK LICENSE TERMS***********************
*
* The nsock parallel socket event library is (C) 1999-2023 Nmap Software LLC
* This library is free software; you may redistribute and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; Version 2. This guarantees your right to use, modify, and
* redistribute this software under certain conditions. If this license is
* unacceptable to you, Nmap Software LLC may be willing to sell alternative
* licenses (contact sales@nmap.com ).
*
* As a special exception to the GPL terms, Nmap Software LLC grants permission
* to link the code of this program with any version of the OpenSSL library
* which is distributed under a license identical to that listed in the included
* docs/licenses/OpenSSL.txt file, and distribute linked combinations including
* the two. You must obey the GNU GPL in all respects for all of the code used
* other than OpenSSL. If you modify this file, you may extend this exception to
* your version of the file, but you are not obligated to do so.
*
* If you received these files with a written license agreement stating terms
* other than the (GPL) terms above, then that alternative license agreement
* takes precedence over this comment.
*
* Source is provided to this software because we believe users have a right to
* know exactly what a program is going to do before they run it. This also
* allows you to audit the software for security holes.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and add
* new features. You are highly encouraged to send your changes to the
* dev@nmap.org mailing list for possible incorporation into the main
* distribution. By sending these changes to Fyodor or one of the Insecure.Org
* development mailing lists, or checking them into the Nmap source code
* repository, it is understood (unless you specify otherwise) that you are
* offering the Nmap Project (Nmap Software LLC) the unlimited, non-exclusive
* right to reuse, modify, and relicense the code. Nmap will always be available
* Open Source, but this is important because the inability to relicense code
* has caused devastating problems for other Free Software projects (such as KDE
* and NASM). We also occasionally relicense the code to third parties as
* discussed above. If you wish to specify special license conditions of your
* contributions, just say so when you send them.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License v2.0 for more
* details (http://www.gnu.org/licenses/gpl-2.0.html).
*
***************************************************************************/
/* $Id$ */
#include "nsock_internal.h"
#include "filespace.h"
#include <string.h>
#define FS_INITSIZE_DEFAULT 1024
/* Assumes space for fs has already been allocated */
int filespace_init(struct filespace *fs, int initial_size) {
memset(fs, 0, sizeof(struct filespace));
if (initial_size == 0)
initial_size = FS_INITSIZE_DEFAULT;
fs->current_alloc = initial_size;
fs->str = (char *)safe_malloc(fs->current_alloc);
fs->str[0] = '\0';
fs->pos = fs->str;
return 0;
}
int fs_free(struct filespace *fs) {
if (fs->str)
free(fs->str);
fs->current_alloc = fs->current_size = 0;
fs->pos = fs->str = NULL;
return 0;
}
/* Concatenate a string to the end of a filespace */
int fs_cat(struct filespace *fs, const char *str, int len) {
if (len < 0)
return -1;
if (len == 0)
return 0;
if (fs->current_alloc - fs->current_size < len + 2) {
char *tmpstr;
fs->current_alloc = (int)(fs->current_alloc * 1.4 + 1);
fs->current_alloc += 100 + len;
tmpstr = (char *)safe_malloc(fs->current_alloc);
memcpy(tmpstr, fs->str, fs->current_size);
fs->pos = (fs->pos - fs->str) + tmpstr;
if (fs->str)
free(fs->str);
fs->str = tmpstr;
}
memcpy(fs->str + fs->current_size, str, len);
fs->current_size += len;
fs->str[fs->current_size] = '\0';
return 0;
}
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