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/* concat.c -- concatenate a variable number (minimum of 1)
* of strings in managed memory
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include "h/mh.h"
#include "concat.h"
#include "utils.h"
/* concat returns a non-NULL malloc'd pointer to the catenation of the
* argument strings less their NUL terminators other than the last. The
* arguments are terminated by a NULL.
*
* Example: concat("abc", "def", "", "g", NULL) returns "abcdefg". */
char *
concat (const char *s1, ...)
{
char *cp, *dp, *sp;
size_t len;
va_list list;
len = strlen (s1) + 1;
va_start(list, s1);
while ((cp = va_arg(list, char *)))
len += strlen (cp);
va_end(list);
dp = sp = mh_xmalloc(len);
sp = stpcpy(sp, s1);
va_start(list, s1);
while ((cp = va_arg (list, char *)))
sp = stpcpy(sp, cp);
va_end(list);
return dp;
}
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