#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;
}