sprintf.c

Go to the documentation of this file.

/* sprintf.c - sprintf */

#include <stdarg.h>

static int sprntf(int, int);
extern void _fdoprnt(char *, va_list, int (*func) (int, int), int);

/*------------------------------------------------------------------------
 *  sprintf  -  Format arguments and place output in a string.
 *------------------------------------------------------------------------
 */
int sprintf(
      char      *str,       /* output string        */
      char      *fmt,       /* format string        */
      ...
    )
{
    va_list ap;
    char *s;

    s = str;
    va_start(ap, fmt);
    _fdoprnt(fmt, ap, sprntf, (int)&s);
    va_end(ap);
    *s++ = '\0';

    return ((int)str);
}

/*------------------------------------------------------------------------
 *  sprntf  -  Routine called by _doprnt to handle each character.
 *------------------------------------------------------------------------
 */
static int  sprntf(
          int       acpp,
          int       ac
        )
{
    char **cpp = (char **)acpp;
    char c = (char)ac;

    return (*(*cpp)++ = c);
}