libpayload: add memchr to libc
libfdt requires memchr. Add missing function to libc. Change-Id: I872026559d16a352f350147c9d7c4be97456a99f Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31354 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
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@ -39,6 +39,7 @@
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void *memset(void *s, int c, size_t n);
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void *memcpy(void *dst, const void *src, size_t n);
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void *memmove(void *dst, const void *src, size_t n);
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void *memchr(const void *s, int c, size_t n);
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int memcmp(const void *s1, const void *s2, size_t len);
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/** @} */
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@ -145,3 +145,15 @@ static int default_memcmp(const void *s1, const void *s2, size_t n)
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int memcmp(const void *s1, const void *s2, size_t n)
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__attribute__((weak, alias("default_memcmp")));
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void *memchr(const void *s, int c, size_t n)
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{
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unsigned char *p = (unsigned char *)s;
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while (n--)
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if (*p != (unsigned char)c)
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p++;
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else
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return p;
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return 0;
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}
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