rosapps/net/ncftp/Strn/Dynscat.c

   1 #include <sys/types.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <stdarg.h>
   5 #include "Strn.h"
   6
   7 /*VARARGS*/
   8 char *
   9 Dynscat(char **dst, ...)
  10 {
  11         va_list ap;
  12         const char *src;
  13         char *newdst, *dcp;
  14         size_t curLen, catLen, srcLen;
  15
  16         if (dst == (char **) 0)
  17                 return NULL;
  18
  19         catLen = 0;
  20         va_start(ap, dst);
  21         src = va_arg(ap, char *);
  22         while (src != NULL) {
  23                 catLen += strlen(src);
  24                 src = va_arg(ap, char *);
  25         }
  26         va_end(ap);
  27
  28         if ((*dst == NULL) || (**dst == '\0'))
  29                 curLen = 0;
  30         else
  31                 curLen = strlen(*dst);
  32
  33         if (*dst == NULL)
  34                 newdst = malloc(curLen + catLen + 2);
  35         else
  36                 newdst = realloc(*dst, curLen + catLen + 2);
  37         if (newdst == NULL)
  38                 return NULL;
  39
  40         dcp = newdst + curLen;
  41         va_start(ap, dst);
  42         src = va_arg(ap, char *);
  43         while (src != NULL) {
  44                 srcLen = strlen(src);
  45                 memcpy(dcp, src, srcLen);
  46                 dcp += srcLen;
  47                 src = va_arg(ap, char *);
  48         }
  49         va_end(ap);
  50         *dcp = '\0';
  51
  52         *dst = newdst;
  53         return (newdst);
  54 }       /* Dynscat */