x86UNIXStrings.cpp

Public Functions

const char *

stristr(const char * szStringToBeSearched, const char * szSubstringToSearchFor)

Public Functions

stristr(const char * szStringToBeSearched, const char * szSubstringToSearchFor)

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#include "platformX86UNIX/platformX86UNIX.h"
25#include "core/strings/stringFunctions.h"
26#include <stdarg.h>
27#include <ctype.h>
28#include <stdlib.h>
29
30
31const char *stristr(const char *szStringToBeSearched, const char *szSubstringToSearchFor)
32{
33   const char *pPos = NULL;
34   char *szCopy1 = NULL;
35   char *szCopy2 = NULL;
36
37   // verify parameters
38   if ( szStringToBeSearched == NULL ||
39        szSubstringToSearchFor == NULL )
40   {
41      return szStringToBeSearched;
42   }
43
44   // empty substring - return input (consistent with strstr)
45   if (strlen(szSubstringToSearchFor) == 0 ) {
46      return szStringToBeSearched;
47   }
48
49   szCopy1 = dStrlwr(strdup(szStringToBeSearched));
50   szCopy2 = dStrlwr(strdup(szSubstringToSearchFor));
51
52   if ( szCopy1 == NULL || szCopy2 == NULL  ) {
53      // another option is to raise an exception here
54      free((void*)szCopy1);
55      free((void*)szCopy2);
56      return NULL;
57   }
58
59   pPos = strstr((const char*)szCopy1, (const char*)szCopy2);
60
61   if ( pPos != NULL ) {
62      // map to the original string
63      pPos = szStringToBeSearched + (pPos - szCopy1);
64   }
65
66   free((void*)szCopy1);
67   free((void*)szCopy2);
68
69   return pPos;
70} // stristr(...)
71
72