src/TortoisePlink/utils/dupcat.c

   1 /*
   2  * Implementation function behind dupcat() in misc.h.
   3  *
   4  * This function is called with an arbitrary number of 'const char *'
   5  * parameters, of which the last one is a null pointer. The wrapper
   6  * macro puts on the null pointer itself, so normally callers don't
   7  * have to.
   8  */
   9
  10 #include <string.h>
  11 #include <stdarg.h>
  12
  13 #include "defs.h"
  14 #include "misc.h"
  15
  16 char *dupcat_fn(const char *s1, ...)
  17 {
  18     int len;
  19     char *p, *q, *sn;
  20     va_list ap;
  21
  22     len = strlen(s1);
  23     va_start(ap, s1);
  24     while (1) {
  25         sn = va_arg(ap, char *);
  26         if (!sn)
  27             break;
  28         len += strlen(sn);
  29     }
  30     va_end(ap);
  31
  32     p = snewn(len + 1, char);
  33     strcpy(p, s1);
  34     q = p + strlen(p);
  35
  36     va_start(ap, s1);
  37     while (1) {
  38         sn = va_arg(ap, char *);
  39         if (!sn)
  40             break;
  41         strcpy(q, sn);
  42         q += strlen(q);
  43     }
  44     va_end(ap);
  45
  46     return p;
  47 }
  48