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/* strerror_s( char *, rsize_t, errno_t )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef REGTEST
#include <locale.h>
errno_t strerror_s( char * s, rsize_t maxsize, errno_t errnum )
{
size_t len = strerrorlen_s( errnum );
if ( s == NULL || maxsize > RSIZE_MAX || maxsize == 0 )
{
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return _PDCLIB_EINVAL;
}
if ( len < maxsize )
{
strcpy( s, strerror( errnum ) );
}
else
{
strncpy( s, strerror( errnum ), maxsize - 1 );
if ( maxsize > 3 )
{
strcpy( &s[ maxsize - 4 ], "..." );
}
else
{
s[ maxsize - 1 ] = '\0';
}
}
return 0;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#include <stdio.h>
#include <errno.h>
int main( void )
{
#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
char s[14];
TESTCASE( strerror_s( s, 14, _PDCLIB_ERRNO_MAX ) == 0 );
TESTCASE( strcmp( s, "unknown error" ) == 0 );
TESTCASE( strerror_s( s, 13, _PDCLIB_ERRNO_MAX ) == 0 );
TESTCASE( strcmp( s, "unknown e..." ) == 0 );
#endif
return TEST_RESULTS;
}
#endif
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