com32/lib/asprintf.c

   1 /*
   2  * asprintf.c
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <stdarg.h>
   8
   9 int asprintf(char **bufp, const char *format, ...)
  10 {
  11     va_list ap, ap1;
  12     int rv;
  13     int bytes;
  14     char *p;
  15
  16     va_start(ap, format);
  17     va_copy(ap1, ap);
  18
  19     bytes = vsnprintf(NULL, 0, format, ap1) + 1;
  20     va_end(ap1);
  21
  22     *bufp = p = malloc(bytes);
  23     if (!p)
  24         rv = -1;
  25     else
  26         rv = vsnprintf(p, bytes, format, ap);
  27
  28     va_end(ap);
  29
  30     return rv;
  31 }