port.c

00001 /* port.c 
00002  *
00003  * Copyright (C) 2014-2016 wolfSSL Inc.
00004  *
00005  * This file is part of wolfSSH.
00006  *
00007  * wolfSSH is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * wolfSSH is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with wolfSSH.  If not, see <http://www.gnu.org/licenses/>.
00019  */
00020 
00021 
00022 /*
00023  * The port module wraps standard C library functions with macros to
00024  * cover portablility issues when building in environments that rename
00025  * those functions. This module also provides local versions of some
00026  * standard C library functions that are missing on some platforms.
00027  */
00028 
00029 
00030 #ifdef HAVE_CONFIG_H
00031     #include <config.h>
00032 #endif
00033 
00034 #include <stdio.h>
00035 #include <wolfssh/port.h>
00036 
00037 
00038 int wfopen(WFILE** f, const char* filename, const char* mode)
00039 {
00040 #ifdef USE_WINDOWS_API
00041     return fopen_s(f, filename, mode) != 0;
00042 #else
00043     if (f != NULL) {
00044         *f = fopen(filename, mode);
00045         return *f == NULL;
00046     }
00047     return 1;
00048 #endif
00049 }
00050 
00051 
00052 #ifndef WSTRING_USER
00053 
00054 char* wstrnstr(const char* s1, const char* s2, unsigned int n)
00055 {
00056     unsigned int s2_len = (unsigned int)WSTRLEN(s2);
00057 
00058     if (s2_len == 0)
00059         return (char*)s1;
00060 
00061     while (n >= s2_len && s1[0]) {
00062         if (s1[0] == s2[0])
00063             if (WMEMCMP(s1, s2, s2_len) == 0)
00064                 return (char*)s1;
00065         s1++;
00066         n--;
00067     }
00068 
00069     return NULL;
00070 }
00071 
00072 #endif /* WSTRING_USER */