#include "util.h"

#include "logging.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;

	if(!fmt) {

		flib_log_e("null parameter in flib_vasprintf");

	} else {

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

		if(requiredSize<0) {

			flib_log_e("Error formatting string with template \"%s\" in flib_vasprintf", fmt);

		} else {

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

			if(tmpbuf && 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 = flib_malloc(size);

	if(result) {

		memcpy(result, buf, size);

	}

	return result;

}

void *flib_malloc(size_t size) {

	void *result = malloc(size);

	if(!result) {

		flib_log_e("Out of memory trying to malloc %zu bytes.", size);

	}

	return result;

}

void *flib_calloc(size_t count, size_t elementsize) {

	void *result = calloc(count, elementsize);

	if(!result) {

		flib_log_e("Out of memory trying to calloc %zu objects of %zu bytes each.", count, elementsize);

	}

	return result;

}