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Annotation of embedaddon/tmux/compat/asprintf.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
                      3:  *
                      4:  * Permission to use, copy, modify, and distribute this software for any
                      5:  * purpose with or without fee is hereby granted, provided that the above
                      6:  * copyright notice and this permission notice appear in all copies.
                      7:  *
                      8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                      9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     12:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
                     13:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
                     14:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     15:  */
                     16: 
                     17: #include <sys/types.h>
                     18: 
                     19: #include <stdarg.h>
                     20: #include <stdio.h>
                     21: #include <string.h>
                     22: 
                     23: #include "compat.h"
                     24: 
                     25: int
                     26: asprintf(char **ret, const char *fmt, ...)
                     27: {
                     28:        va_list ap;
                     29:        int     n;
                     30: 
                     31:        va_start(ap, fmt);
                     32:        n = vasprintf(ret, fmt, ap);
                     33:        va_end(ap);
                     34: 
                     35:        return (n);
                     36: }
                     37: 
                     38: int
                     39: vasprintf(char **ret, const char *fmt, va_list ap)
                     40: {
                     41:        int      n;
                     42:        va_list  ap2;
                     43: 
                     44:        va_copy(ap2, ap);
                     45: 
                     46:        if ((n = vsnprintf(NULL, 0, fmt, ap)) < 0)
                     47:                goto error;
                     48: 
                     49:        *ret = xmalloc(n + 1);
                     50:        if ((n = vsnprintf(*ret, n + 1, fmt, ap2)) < 0) {
                     51:                free(*ret);
                     52:                goto error;
                     53:        }
                     54:        va_end(ap2);
                     55: 
                     56:        return (n);
                     57: 
                     58: error:
                     59:        va_end(ap2);
                     60:        *ret = NULL;
                     61:        return (-1);
                     62: }