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;
+}
+