/***************************************************************************
 * strcasecmp.c -- strcasecmp and strncasecmp for systems (like Windows)   *
 * which do not already have them.                                         *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2022 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/                            *
 *                                                                         *
 ***************************************************************************/

/* $Id$ */

#if !defined(HAVE_STRCASECMP) || !defined(HAVE_STRNCASECMP)
#include <stdlib.h>
#include <string.h>
#include "nbase.h"
#endif

#ifndef HAVE_STRCASECMP
int strcasecmp(const char *s1, const char *s2)
{
    int i, ret;
    char *cp1, *cp2;

    cp1 = safe_malloc(strlen(s1) + 1);
    cp2 = safe_malloc(strlen(s2) + 1);

    for (i = 0; i < strlen(s1) + 1; i++)
        cp1[i] = tolower((int) (unsigned char) s1[i]);
    for (i = 0; i < strlen(s2) + 1; i++)
        cp2[i] = tolower((int) (unsigned char) s2[i]);

    ret = strcmp(cp1, cp2);

    free(cp1);
    free(cp2);

    return ret;
}
#endif

#ifndef HAVE_STRNCASECMP
int strncasecmp(const char *s1, const char *s2, size_t n)
{
    int i, ret;
    char *cp1, *cp2;

    cp1 = safe_malloc(strlen(s1) + 1);
    cp2 = safe_malloc(strlen(s2) + 1);

    for (i = 0; i < strlen(s1) + 1; i++)
        cp1[i] = tolower((int) (unsigned char) s1[i]);
    for (i = 0; i < strlen(s2) + 1; i++)
        cp2[i] = tolower((int) (unsigned char) s2[i]);

    ret = strncmp(cp1, cp2, n);

    free(cp1);
    free(cp2);

    return ret;
}
#endif