Commit b312eb0b authored by Willy Tarreau's avatar Willy Tarreau Committed by Paul E. McKenney
Browse files

tools/nolibc/string: add strncpy() and strlcpy() 



These are minimal variants. strncpy() always fills the destination for
<size> chars, while strlcpy() copies no more than <size> including the
zero and returns the source's length. The respective sizes on various
archs are:

  strncpy(): x86:0x1f mips:0x30 arm:0x20
  strlcpy(): x86:0x17 mips:0x34 arm:0x1a

Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent d76232ff

tools/include/nolibc/string.h

+28 −0
Original line number Diff line number Diff line
@@ -121,6 +121,34 @@ size_t nolibc_strlen(const char *str) 
		nolibc_strlen((str));           \

})



static __attribute__((unused))

size_t strlcpy(char *dst, const char *src, size_t size)

{

	size_t len;

	char c;



	for (len = 0;;) {

		c = src[len];

		if (len < size)

			dst[len] = c;

		if (!c)

			break;

		len++;

	}

	return len;

}



static __attribute__((unused))

char *strncpy(char *dst, const char *src, size_t size)

{

	size_t len;



	for (len = 0; len < size; len++)

		if ((dst[len] = *src))

			src++;

	return dst;

}



static __attribute__((unused))

char *strrchr(const char *s, int c)

{