/******************************************************************************
 *
 *                Copyright (c) 2017-2019 by Löwenware Ltd
 *             Please, refer LICENSE file for legal information
 *
 ******************************************************************************/

/**
 * @file string.c
 * @author Ilja Kartašov <ik@lowenware.com>
 * @brief cStuff string module implementation
 *
 * @see https://lowenware.com/
 */

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

#include "string.h"

int
cstuff_strcpy(char **out, const char *in)
{
	return cstuff_strncpy(out, in, strlen(in));
}


int
cstuff_strncpy(char **out, const char *in, int len)
{
	char *s;
 
	if (!(s = malloc( len + 1 )))
		return -1;

	strncpy(s, in, len);
	s[len]=0;

	*out = s;

	return len;
}


int
cstuff_strset(char **out, const char *in)
{
	return cstuff_strnset(out, in, strlen(in));
}


int
cstuff_strnset(char **out, const char *in, int len)
{
	char *s;

	if (!(s = realloc(*out, len+1)))
		return -1;

	strncpy(s, in, len);
	s[len] = 0;

	*out = s;

	return len;
}


int
cstuff_sprintf(char **out, const char *format, ...)
{
	int result;
	va_list vl;

	va_start(vl, format);
	result = cstuff_vsprintf(out, format, vl);
	va_end(vl);

	return result;
}


int
cstuff_vsprintf(char **out, const char *format, va_list args)
{
	int result;
	va_list vc;
	char tmp, *s;

	va_copy(vc, args);
	result = vsnprintf(&tmp, 1, format, vc);
	va_end(vc);

	if (!(s = malloc(result + 1)))
		return -1;

	*out = s;
	result = vsnprintf(s, result+1, format, args); 

	return result;
}