src/pdclib/functions/ctype/isdigit.c


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/* isdigit( int )

   This file is part of the Public Domain C Library (PDCLib).
   Permission is granted to use, modify, and / or redistribute at will.
*/

#include <ctype.h>

#ifndef REGTEST

#include <locale.h>

int isdigit( int c )
{
    return ( c >= _PDCLIB_lc_ctype.digits_low && c <= _PDCLIB_lc_ctype.digits_high );
}

#endif

#ifdef TEST

#include "_PDCLIB_test.h"

int main( void )
{
    TESTCASE( isdigit( '0' ) );
    TESTCASE( isdigit( '9' ) );
    TESTCASE( ! isdigit( ' ' ) );
    TESTCASE( ! isdigit( 'a' ) );
    TESTCASE( ! isdigit( '@' ) );
    return TEST_RESULTS;
}

#endif