src/usr.bin/ssh/misc.c - diff

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-version 1.144, 2020/01/23 07:10:22
+version 1.145, 2020/01/24 23:54:40
 Line 1202
 Line 1202
 Line 1202
          return (r);
  }
+ /*
+  * Extend string *sp by the specified format. If *sp is not NULL (or empty),
+  * then the separator 'sep' will be prepended before the formatted arguments.
+  * Extended strings are heap allocated.
+  */
+ void
+ xextendf(char **sp, const char *sep, const char *fmt, ...)
+ {
+         va_list ap;
+         char *tmp1, *tmp2;
+         va_start(ap, fmt);
+         xvasprintf(&tmp1, fmt, ap);
+         va_end(ap);
+         if (*sp == NULL || **sp == '\0') {
+                 free(*sp);
+                 *sp = tmp1;
+                 return;
+         }
+         xasprintf(&tmp2, "%s%s%s", *sp, sep == NULL ? "" : sep, tmp1);
+         free(tmp1);
+         free(*sp);
+         *sp = tmp2;
+ }
  u_int64_t
  get_u64(const void *vp)
  {