53 lines
952 B
C
53 lines
952 B
C
// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_STRING_STRCPY_STRTCPY_H_
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#define SHADOW_INCLUDE_LIB_STRING_STRCPY_STRTCPY_H_
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#include "config.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/types.h>
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#include "attr.h"
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#include "sizeof.h"
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// strtcpy_a - string truncate copy array
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#define strtcpy_a(dst, src) strtcpy(dst, src, countof(dst))
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ATTR_STRING(2)
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inline ssize_t strtcpy(char *restrict dst, const char *restrict src,
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size_t dsize);
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// strtcpy - string truncate copy
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inline ssize_t
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strtcpy(char *restrict dst, const char *restrict src, size_t dsize)
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{
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bool trunc;
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size_t dlen, slen;
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if (dsize == 0)
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return -1;
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slen = strnlen(src, dsize);
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trunc = (slen == dsize);
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dlen = slen - trunc;
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stpcpy(mempcpy(dst, src, dlen), "");
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if (trunc)
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return -1;
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return slen;
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}
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#endif // include guard
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