50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
// SPDX-FileCopyrightText: 2024-2025, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_STRING_STRCMP_STRCASEPREFIX_H_
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#define SHADOW_INCLUDE_LIB_STRING_STRCMP_STRCASEPREFIX_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 "cast.h"
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// string case-insensitive prefix
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#define strcaseprefix(s, prefix) \
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({ \
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const char *p_; \
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\
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p_ = strcaseprefix_(s, prefix); \
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\
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_Generic(s, \
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const char *: p_, \
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const void *: p_, \
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char *: const_cast(char *, p_), \
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void *: const_cast(char *, p_) \
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); \
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})
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ATTR_STRING(1) ATTR_STRING(2)
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inline const char *strcaseprefix_(const char *s, const char *prefix);
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// strprefix_(), but case-insensitive.
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inline const char *
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strcaseprefix_(const char *s, const char *prefix)
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{
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if (strncasecmp(s, prefix, strlen(prefix)) != 0)
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return NULL;
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return s + strlen(prefix);
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}
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#endif // include guard
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