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60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (compat_strcasestr.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <ctype.h>
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#include <compat/strcasestr.h>
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#include <retro_assert.h>
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/* Pretty much strncasecmp. */
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static int casencmp(const char *a, const char *b, size_t n)
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{
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size_t i;
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for (i = 0; i < n; i++)
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{
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int a_lower = tolower(a[i]);
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int b_lower = tolower(b[i]);
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if (a_lower != b_lower)
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return a_lower - b_lower;
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}
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return 0;
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}
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char *strcasestr_retro__(const char *haystack, const char *needle)
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{
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size_t i, search_off;
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size_t hay_len = strlen(haystack);
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size_t needle_len = strlen(needle);
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if (needle_len > hay_len)
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return NULL;
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search_off = hay_len - needle_len;
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for (i = 0; i <= search_off; i++)
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if (!casencmp(haystack + i, needle, needle_len))
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return (char*)haystack + i;
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return NULL;
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}
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