#include "util.h"

#include <stddef.h>

#include <stdarg.h>

#include <stdlib.h>

#include <string.h>

#include <stdio.h>

char *flib_asprintf(const char *fmt, ...) {

	va_list argp;

	va_start(argp, fmt);

	char *result = flib_vasprintf(fmt, argp);

	va_end(argp);

	return result;

}

char *flib_vasprintf(const char *fmt, va_list args) {

	char *result = NULL;

	int requiredSize = vsnprintf(NULL, 0, fmt, args)+1;				// Figure out how much memory we need,

	if(requiredSize>=0) {

		char *tmpbuf = malloc(requiredSize);						// allocate it

		if(tmpbuf) {

			if(vsnprintf(tmpbuf, requiredSize, fmt, args)>=0) {		// and then do the actual formatting.

				result = tmpbuf;

				tmpbuf = NULL;

			}

		}

		free(tmpbuf);

	}

	return result;

}

char *flib_strdupnull(const char *str) {

	if(!str) {

		return NULL;

	}

	return flib_asprintf("%s", str);

}

void *flib_bufdupnull(const void *buf, size_t size) {

	if(!buf || size==0) {

		return NULL;

	}

	void *result = malloc(size);

	if(result) {

		memcpy(result, buf, size);

	}

	return result;

}