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