/*

	compat: Some compatibility functions (basic memory and string stuff)

	The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.

	So anything possibly somewhat advanced should be considered to be put here, with proper #ifdef;-)

	copyright 2007-2016 by the mpg123 project - free software under the terms of the LGPL 2.1

	see COPYING and AUTHORS files in distribution or http://mpg123.org

	initially written by Thomas Orgis, Windows Unicode stuff by JonY.

*/

#include "compat.h"

#include "debug.h"

/* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */

void *safe_realloc(void *ptr, size_t size)

{

	if(ptr == NULL) return malloc(size);

	else return realloc(ptr, size);

}

#ifndef HAVE_STRERROR

const char *strerror(int errnum)

{

	extern int sys_nerr;

	extern char *sys_errlist[];

	return (errnum < sys_nerr) ?  sys_errlist[errnum]  :  "";

}

#endif

char* compat_strdup(const char *src)

{

	char *dest = NULL;

	if(src)

	{

		size_t len;

		len = strlen(src)+1;

		if((dest = malloc(len)))

			memcpy(dest, src, len);

	}

	return dest;

}