isdigit.gml

来自「开放源码的编译器open watcom 1.6.0版的源代码」· GML 代码 · 共 72 行

.func isdigit iswdigit _uisdigit
.funcw iswdigit
#include <ctype.h>
int isdigit( int c );
.ixfunc2 '&CharTest' &func
.if &'length(&wfunc.) ne 0 .do begin
#include <wctype.h>
int iswdigit( wint_t c );
.ixfunc2 '&CharTest' &wfunc
.ixfunc2 '&Wide' &wfunc
.do end
.if &'length(&ufunc.) ne 0 .do begin
int _uisdigit( int c );
.ixfunc2 '&CharTest' &ufunc
.do end
.funcend
.desc begin
The &func function tests for any decimal-digit character '0' through
'9'.
.if &'length(&wfunc.) ne 0 .do begin
.np
The &wfunc function is similar to &func except that it accepts a
wide-character argument.
.do end
.if &'length(&ufunc.) ne 0 .do begin
.np
The &ufunc Unicode function is identical to &func except that it
accepts a Unicode character argument.
.do end
.desc end
.return begin
The &func function returns a non-zero value when the argument is a
decimal-digit character.
.if &'length(&wfunc.) ne 0 .do begin
The &wfunc function returns a non-zero value when the argument is a
wide character corresponding to a decimal-digit character.
.do end
Otherwise, zero is returned.
.return end
.see begin
.im seeis &function.
.see end
.exmp begin
#include <stdio.h>
#include <ctype.h>

char chars[] = {
    'A',
    '5',
    '$'
};
.exmp break
#define SIZE sizeof( chars ) / sizeof( char )
.exmp break
void main()
{
    int   i;
.exmp break
    for( i = 0; i < SIZE; i++ ) {
        printf( "Char %c is %sa digit character\n",
                chars[i],
                ( isdigit( chars[i] ) ) ? "" : "not " );
    }
}
.exmp output
Char A is not a digit character
Char 5 is a digit character
Char $ is not a digit character
.exmp end
.class ANSI
.system