sprintf.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  sprintf.c
 *
 *
 * ######################################################################
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#include <varargs.h>
#include <sysdefs.h>

extern int _doprntx(
	       UINT8	*fmt0,
	       va_list 	argp,
	       void	(*putc)(),
	       char	**pca);


static void putch(char ch, char **pca)
{
	*(*pca)++ = ch;
}



int vsprintf(char *buf, char *fmt, va_list ap)
{
	int len = _doprntx(fmt, ap, (void (*)())putch, &buf);

	putch(0, &buf);
	return len;
}



int sprintf(int va_alist, ...)
{
	va_list	args;
	char	*buf, *fmt;
	int	len;

	va_start(args);
	buf = va_arg(args, char *);
	fmt = va_arg(args, char *);
	len = _doprntx(fmt, args, (void (*))putch, &buf);
	va_end(args);

	putch(0, &buf);
	return len;
}