githubmirror/nmap

string_pool.h
84 строки4 KB
dmiller
Bump copyright date to 2026 [skip ci]
17 фев 2026, 01:33
17 фев 2026, 01:3395d380b
/***************************************************************************
 * string_pool.h -- String interning for memory optimization               *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *
 * The Nmap Security Scanner is (C) 1996-2026 Nmap Software LLC ("The Nmap
 * Project"). Nmap is also a registered trademark of the Nmap Project.
 *
 * This program is distributed under the terms of the Nmap Public Source
 * License (NPSL). The exact license text applying to a particular Nmap
 * release or source code control revision is contained in the LICENSE
 * file distributed with that version of Nmap or source code control
 * revision. More Nmap copyright/legal information is available from
 * https://nmap.org/book/man-legal.html, and further information on the
 * NPSL license itself can be found at https://nmap.org/npsl/ . This
 * header summarizes some key points from the Nmap license, but is no
 * substitute for the actual license text.
 *
 * Nmap is generally free for end users to download and use themselves,
 * including commercial use. It is available from https://nmap.org.
 *
 * The Nmap license generally prohibits companies from using and
 * redistributing Nmap in commercial products, but we sell a special Nmap
 * OEM Edition with a more permissive license and special features for
 * this purpose. See https://nmap.org/oem/
 *
 * If you have received a written Nmap license agreement or contract
 * stating terms other than these (such as an Nmap OEM license), you may
 * choose to use and redistribute Nmap under those terms instead.
 *
 * The official Nmap Windows builds include the Npcap software
 * (https://npcap.com) for packet capture and transmission. It is under
 * separate license terms which forbid redistribution without special
 * permission. So the official Nmap Windows builds may not be redistributed
 * without special permission (such as an Nmap OEM license).
 *
 * 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 submit your changes as a
 * Github PR or by email to the dev@nmap.org mailing list for possible
 * incorporation into the main distribution. Unless you specify otherwise, it
 * is understood that you are offering us very broad rights to use your
 * submissions as described in the Nmap Public Source License Contributor
 * Agreement. This is important because we fund the project by selling licenses
 * with various terms, and also because the inability to relicense code has
 * caused devastating problems for other Free Software projects (such as KDE
 * and NASM).
 *
 * The free version of Nmap 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. Warranties,
 * indemnification and commercial support are all available through the
 * Npcap OEM program--see https://nmap.org/oem/
 *
 ***************************************************************************/
#ifndef STRING_POOL_H
#define STRING_POOL_H

/* The OS database consists of many small strings, many of which appear
   thousands of times. It pays to allocate memory only once for each unique
   string, and have all references point at the one allocated value. */

/* Store a string uniquely. The first time this function is called with a
   certain string, it allocates memory and stores a copy of the string in a
   static pool. Thereafter it will return a pointer to the saved string instead
   of allocating memory for an identical one. */
const char *string_pool_insert(const char *s);

/* Format a string with sprintf and insert it with string_pool_insert. */
const char *string_pool_sprintf(const char *fmt, ...);

/* Store the string in the interval [s,t) */
const char *string_pool_substr(const char *s, const char *t);

/* Store the string in the interval [s,t), stripping whitespace from both ends. */
const char *string_pool_substr_strip(const char *s, const char *t);

/* Skip over whitespace to find the beginning of a word, then read until the
   next whitespace character. Returns NULL if only whitespace is found. */
const char *string_pool_strip_word(const char *s, const char *end);

#endif // STRING_POOL_H