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Diffstat (limited to 'nsock/src/filespace.c')
| -rw-r--r-- | nsock/src/filespace.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/nsock/src/filespace.c b/nsock/src/filespace.c new file mode 100644 index 0000000..f4d5638 --- /dev/null +++ b/nsock/src/filespace.c @@ -0,0 +1,114 @@ +/*************************************************************************** + * 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; +} + |