Coverage Report

Created: 2022-08-24 06:31

/src/libressl/crypto/compat/strlcat.c
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Source (jump to first uncovered line)
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/*  $OpenBSD: strlcat.c,v 1.19 2019/01/25 00:19:25 millert Exp $  */
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/*
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 * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <string.h>
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/*
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 * Appends src to string dst of size dsize (unlike strncat, dsize is the
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 * full size of dst, not space left).  At most dsize-1 characters
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 * will be copied.  Always NUL terminates (unless dsize <= strlen(dst)).
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 * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
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 * If retval >= dsize, truncation occurred.
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 */
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size_t
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strlcat(char *dst, const char *src, size_t dsize)
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22.8M
{
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22.8M
  const char *odst = dst;
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22.8M
  const char *osrc = src;
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22.8M
  size_t n = dsize;
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22.8M
  size_t dlen;
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  /* Find the end of dst and adjust bytes left but don't go past end. */
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1.24G
  while (n-- != 0 && *dst != '\0')
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1.21G
    dst++;
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22.8M
  dlen = dst - odst;
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22.8M
  n = dsize - dlen;
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22.8M
  if (n-- == 0)
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0
    return(dlen + strlen(src));
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71.9M
  while (*src != '\0') {
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49.1M
    if (n != 0) {
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49.1M
      *dst++ = *src;
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49.1M
      n--;
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49.1M
    }
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49.1M
    src++;
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49.1M
  }
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22.8M
  *dst = '\0';
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22.8M
  return(dlen + (src - osrc));  /* count does not include NUL */
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22.8M
}