com32/lib/vasprintf.c

   1 /*
   2  * vasprintf.c
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <stdarg.h>
   8
   9 int vasprintf(char **bufp, const char *format, va_list ap)
  10 {
  11     va_list ap1;
  12     int bytes;
  13     char *p;
  14
  15     va_copy(ap1, ap);
  16
  17     bytes = vsnprintf(NULL, 0, format, ap1) + 1;
  18     va_end(ap1);
  19
  20     *bufp = p = malloc(bytes);
  21     if (!p)
  22         return -1;
  23
  24     return vsnprintf(p, bytes, format, ap);
  25 }