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Perform inconsequential code cleanup

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Justine Tunney 2023-08-07 20:22:49 -07:00
parent 929478c524
commit decf216655
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GPG key ID: BE714B4575D6E328
52 changed files with 326 additions and 442 deletions
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29
libc/str/stpncpy.c
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@ -16,27 +16,30 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
#include "libc/str/str.h"
/**
* Prepares static search buffer.
*
* 1. If SRC is too long, it's truncated and *not* NUL-terminated.
*
* 2. If SRC is too short, the remainder is zero-filled.
*
* Please note this function isn't designed to prevent untrustworthy
* data from modifying memory without authorization. Consider trying
* memccpy() for that purpose.
*
* @return dest + stride
* @see stncpy(), memccpy()
* @param dst is output buffer
* @param src is a nul-terminated string
* @param dstlen is size of `dst` buffer
* @return pointer to first nul-terminator, otherwise dest + stride
* @asyncsignalsafe
* @see strncpy()
* @see memccpy()
* @see strlcpy()
*/
char *stpncpy(char *dest, const char *src, size_t stride) {
char *p;
if ((p = memccpy(dest, src, '\0', stride))) {
bzero(p, dest + stride - p);
}
return dest + stride;
char *stpncpy(char *dst, const char *src, size_t dstlen) {
size_t srclen, cpylen, zerlen;
srclen = strlen(src);
cpylen = MIN(srclen, dstlen);
if (cpylen) memcpy(dst, src, cpylen);
zerlen = dstlen - cpylen;
if (zerlen) bzero(dst + cpylen, zerlen);
return dst + cpylen;
}