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40 lines
1.1 KiB
C
40 lines
1.1 KiB
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 *strchr(const char *s1, int c);
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// char *strrchr(const char *s1, int c);
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///////////////////////////////////////
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#include <stddef.h>
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#include <string.h>
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char *strchr(const char *s, int c) {
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size_t n = strlen(s) + 1;
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return memchr(s, c, n);
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}
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char *strrchr(const char *s, int c) {
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char ch = (char)c;
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size_t i = strlen(s);
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do {
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if (s[i] == ch) {
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return (char*)&s[i];
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}
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} while (i--);
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return NULL;
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}
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