simple-var-args-usage

va_args.c

/*
*	@filename: va_args.c
* 	@author: jq2
*	@description: Simple va_list, va_start, va_end usage example...
*
*/

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


char *read_bi(char *value);
char *read_bj(char value[10]);
void test_read_bi();
void bprint(char *template, ...);


int
main (int argc, char *argv[]) {


	printf("Starting program...\n");
	/* read_bX tests... */
	/* test_read_bi(); */
	
	/* Starting va_args tests... */


	char *vla;

	bprint("teste", "abc", "aaa", NULL);


	return EXIT_SUCCESS;
}

void test_read_bi() {
	char *v = read_bi("122323232323232323232456789");
	printf("The return value is: %s\n", v);
	
	char *v1 = read_bj("3242656456745");
	printf("The return value is: %s\n", v1);



	char *my_value_t[] = {
		"00123",
		"00234",
		"00345"
	};
	
	for (int i = 0; i < sizeof(my_value_t) / sizeof(my_value_t[0]); i++) {
		printf("Counting: %d\n", i);
		printf("The text found is: %s\n", my_value_t[i]);
	}
}

char *read_bi(char *value) {

	printf("[TEST-1] The entered value of \"value\" is: %s\"\n", value);
	return value;
}

char *read_bj(char value[10]) {

	printf("[TEST-2] The entered value of \"value\" is: %s\"\n", value);
	return value;
}

void bprint(char *template, ...) {
	char timestr[19] = {0};
	time_t t = time(NULL);
	strftime(timestr, sizeof(timestr), "%Y-%m-%d %H:%M:%S", localtime(&t));

	va_list list;
	va_start (list, template);
	char *chptr = template;


	while( chptr != NULL) {
		fprintf(stderr, "%s - %s \n", timestr, chptr);
		// vfprintf(stderr, template, list);
		chptr = va_arg(list, char *);
	}
	va_end (list);
}