66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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/*
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* Append src (including its terminating NUL) to the end of dst; return dst.
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* The strings must not overlap (restrict).
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*
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* See strcpy.c: the copy loop is a recognizable pattern, so disable
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* -ftree-loop-distribute-patterns here too.
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*/
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__attribute__((optimize("no-tree-loop-distribute-patterns"))) char *
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strcat(char *restrict dst, const char *restrict src) // NOLINT(bugprone-*)
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{
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char *d = dst;
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/* Find the terminating NUL of dst. */
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while (*d != '\0')
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{
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d++;
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}
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/* Append src including its NUL. */
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for (;;)
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{
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*d++ = *src;
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if (*src == '\0')
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{
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return dst;
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}
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src++;
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}
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}
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/*
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* Append at most n bytes of src to dst and always NUL-terminate; return dst.
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*
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* See strcpy.c: the copy loop is a recognizable pattern, so disable
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* -ftree-loop-distribute-patterns here too.
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*/
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__attribute__((optimize("no-tree-loop-distribute-patterns"))) char *
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strncat(char *restrict dst, const char *restrict src, size_t n) // NOLINT(bugprone-*)
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{
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char *d = dst;
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/* Find the terminating NUL of dst. */
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while (*d != '\0')
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{
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d++;
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}
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/* Append at most n bytes of src, stopping early at its NUL. */
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while (n != 0 && *src != '\0')
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{
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*d++ = *src++;
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n--;
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}
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/* strncat always NUL-terminates. */
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*d = '\0';
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return dst;
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}
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