Add wcsstr(3).
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@ -192,6 +192,7 @@ wchar/wcspbrk.o \
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wchar/wcsrchr.o \
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wchar/wcsrchr.o \
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wchar/wcsrtombs.o \
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wchar/wcsrtombs.o \
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wchar/wcsspn.o \
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wchar/wcsspn.o \
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wchar/wcsstr.o \
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wchar/wcstok.o \
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wchar/wcstok.o \
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wchar/wcstoll.o \
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wchar/wcstoll.o \
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wchar/wcstol.o \
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wchar/wcstol.o \
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@ -80,6 +80,7 @@ wchar_t* wcspbrk(const wchar_t*, const wchar_t*);
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wchar_t* wcsrchr(const wchar_t*, wchar_t);
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wchar_t* wcsrchr(const wchar_t*, wchar_t);
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size_t wcsrtombs(char* __restrict, const wchar_t** __restrict, size_t, mbstate_t* __restrict);
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size_t wcsrtombs(char* __restrict, const wchar_t** __restrict, size_t, mbstate_t* __restrict);
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size_t wcsspn(const wchar_t*, const wchar_t*);
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size_t wcsspn(const wchar_t*, const wchar_t*);
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wchar_t* wcsstr(const wchar_t* __restrict, const wchar_t* __restrict);
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wchar_t* wcstok(wchar_t* __restrict, const wchar_t* __restrict, wchar_t** __restrict);
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wchar_t* wcstok(wchar_t* __restrict, const wchar_t* __restrict, wchar_t** __restrict);
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long long wcstoll(const wchar_t* __restrict, wchar_t** __restrict, int);
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long long wcstoll(const wchar_t* __restrict, wchar_t** __restrict, int);
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long wcstol(const wchar_t* __restrict, wchar_t** __restrict, int);
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long wcstol(const wchar_t* __restrict, wchar_t** __restrict, int);
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@ -114,8 +115,6 @@ int wscanf(const wchar_t* __restrict, ...);
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long double wcstold(const wchar_t* __restrict, wchar_t** __restrict);
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long double wcstold(const wchar_t* __restrict, wchar_t** __restrict);
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size_t wcsftime(wchar_t* __restrict, size_t, const wchar_t* __restrict, const struct tm* __restrict);
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size_t wcsftime(wchar_t* __restrict, size_t, const wchar_t* __restrict, const struct tm* __restrict);
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wchar_t* fgetws(wchar_t* __restrict, int, FILE* __restrict);
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wchar_t* fgetws(wchar_t* __restrict, int, FILE* __restrict);
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wchar_t* wcsstr(const wchar_t* __restrict, const wchar_t* __restrict);
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wchar_t* wcswcs(const wchar_t*, const wchar_t*);
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wchar_t* wmemchr(const wchar_t*, wchar_t, size_t);
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wchar_t* wmemchr(const wchar_t*, wchar_t, size_t);
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wchar_t* wmemcpy(wchar_t* __restrict, const wchar_t* __restrict, size_t);
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wchar_t* wmemcpy(wchar_t* __restrict, const wchar_t* __restrict, size_t);
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wchar_t* wmemmove(wchar_t*, const wchar_t*, size_t);
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wchar_t* wmemmove(wchar_t*, const wchar_t*, size_t);
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@ -0,0 +1,48 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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wchar/wcsstr.cpp
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Locate a wide substring.
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*******************************************************************************/
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#include <wchar.h>
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// TODO: This simple and hacky implementation runs in O(N^2) even though this
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// problem can be solved in O(N).
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extern "C"
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wchar_t* wcsstr(const wchar_t* restrict haystack,
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const wchar_t* restrict needle)
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{
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if ( !needle[0] )
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return (wchar_t*) haystack;
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for ( size_t i = 0; haystack[i]; i++ )
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{
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bool diff = false;
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for ( size_t j = 0; needle[j]; j++ )
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{
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if ( (diff = haystack[i+j] != needle[j]) )
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break;
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}
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if ( diff )
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continue;
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return (wchar_t*) haystack + i;
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}
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return NULL;
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}
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