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36 lines
1,007 B
C
36 lines
1,007 B
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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///////////////////////////////////////
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// Implements:
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// char *strstr(const char *s1, const char *s2);
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///////////////////////////////////////
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// Notes:
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// Tuned for code size.
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#include <stddef.h>
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#include <string.h>
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char *strstr(const char *s1, const char *s2) {
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size_t len = strlen(s2);
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while (*s1) {
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if (strncmp(s1, s2, len) == 0) {
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return (char*)s1;
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}
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s1++;
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}
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return NULL;
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}
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