fe

terminal file explorer and picker
compats.c

(3200B)
      1 #if !HAVE_STRLCAT
      2 /*
      3  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
      4  *
      5  * Permission to use, copy, modify, and distribute this software for any
      6  * purpose with or without fee is hereby granted, provided that the above
      7  * copyright notice and this permission notice appear in all copies.
      8  *
      9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     16  */
     17 
     18 #include <sys/types.h>
     19 #include <string.h>
     20 
     21 /*
     22  * Appends src to string dst of size siz (unlike strncat, siz is the
     23  * full size of dst, not space left).  At most siz-1 characters
     24  * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
     25  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
     26  * If retval >= siz, truncation occurred.
     27  */
     28 size_t
     29 strlcat(char *dst, const char *src, size_t siz)
     30 {
     31 	char *d = dst;
     32 	const char *s = src;
     33 	size_t n = siz;
     34 	size_t dlen;
     35 
     36 	/* Find the end of dst and adjust bytes left but don't go past end */
     37 	while (n-- != 0 && *d != '\0')
     38 		d++;
     39 	dlen = d - dst;
     40 	n = siz - dlen;
     41 
     42 	if (n == 0)
     43 		return(dlen + strlen(s));
     44 	while (*s != '\0') {
     45 		if (n != 1) {
     46 			*d++ = *s;
     47 			n--;
     48 		}
     49 		s++;
     50 	}
     51 	*d = '\0';
     52 
     53 	return(dlen + (s - src));	/* count does not include NUL */
     54 }
     55 #endif /* !HAVE_STRLCAT */
     56 #if !HAVE_STRLCPY
     57 /*
     58  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
     59  *
     60  * Permission to use, copy, modify, and distribute this software for any
     61  * purpose with or without fee is hereby granted, provided that the above
     62  * copyright notice and this permission notice appear in all copies.
     63  *
     64  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     65  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     66  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     67  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     68  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     69  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     70  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     71  */
     72 
     73 #include <sys/types.h>
     74 #include <string.h>
     75 
     76 /*
     77  * Copy src to string dst of size siz.  At most siz-1 characters
     78  * will be copied.  Always NUL terminates (unless siz == 0).
     79  * Returns strlen(src); if retval >= siz, truncation occurred.
     80  */
     81 size_t
     82 strlcpy(char *dst, const char *src, size_t siz)
     83 {
     84 	char *d = dst;
     85 	const char *s = src;
     86 	size_t n = siz;
     87 
     88 	/* Copy as many bytes as will fit */
     89 	if (n != 0) {
     90 		while (--n != 0) {
     91 			if ((*d++ = *s++) == '\0')
     92 				break;
     93 		}
     94 	}
     95 
     96 	/* Not enough room in dst, add NUL and traverse rest of src */
     97 	if (n == 0) {
     98 		if (siz != 0)
     99 			*d = '\0';		/* NUL-terminate dst */
    100 		while (*s++)
    101 			;
    102 	}
    103 
    104 	return(s - src - 1);	/* count does not include NUL */
    105 }
    106 #endif /* !HAVE_STRLCPY */