ply/printxf_test.c

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "printxf.h"


int printxf_test(const char *fmt, ...)
{
	va_list ap, xap;
	FILE *fp, *xfp;
	char *buf, *xbuf;
	size_t loc, xloc;
	int len, xlen;

	 fp = open_memstream( &buf,  &loc);
	xfp = open_memstream(&xbuf, &xloc);

	va_start(ap, fmt);
	va_copy(xap, ap);

	len = vfprintf (        fp, fmt,  ap);
	xlen = vfprintxf(NULL, xfp, fmt, xap);

	va_end(xap);
	va_end( ap);

	fclose(xfp);
	fclose( fp);

	if ((xlen == len)
	    && (xloc == loc)
	    && !strcmp(xbuf, buf)) {
		free(xbuf);
		free( buf);
		return 0;
	}

	printf("FAIL  len:%2d  loc:%2zd  buf:\"%s\"\n",  len,  loc,  buf);
	printf("     xlen:%2d xloc:%2zd xbuf:\"%s\"\n", xlen, xloc, xbuf);
	return -1;
}


int main(void)
{
	printxf_test("testing %% %.*s %d\n%", 3, "w000t", 13);
}