40 lines
679 B
C
40 lines
679 B
C
// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_STRING_STRSPN_STRRSPN_H_
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#define SHADOW_INCLUDE_LIB_STRING_STRSPN_STRRSPN_H_
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#include "config.h"
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#include <stddef.h>
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#include <string.h>
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#include "attr.h"
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#include "string/strchr/strnul.h"
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ATTR_STRING(1)
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ATTR_STRING(2)
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inline size_t strrspn_(const char *s, const char *accept);
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// string rear substring prefix length
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inline size_t
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strrspn_(const char *s, const char *accept)
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{
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const char *p;
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p = strnul(s);
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while (p > s) {
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p--;
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if (strchr(accept, *p) == NULL)
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return p + 1 - s;
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}
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return 0;
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}
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#endif // include guard
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