cvaltype.c

详细介绍了一篇关于pci开发的接口芯片

/*  CXL - Copyright (c) 1987-1989 by Mike Smedley - All Rights Reserved  */
/*  CVALTYPE.C  - determines if a character is a valid for a given CXL type  */

#include <ctype.h>
#include <string.h>
#include "cxldef.h"
#include "cxlstr.h"

static char bad_filechars[]="*?;,=+<>|/[]\"";

int cvaltype(int ch,int ctype)
{
    register int valid=NO;

    switch(ctype) {
        case '9':                               /* is char type = float?     */
            if( ch=='.' || ch=='+' || ch=='-' ) {
                valid=YES;
                break;
            }
        case '#':                               /* is char type = numeric?   */
            if( ch>='0' && ch<='9' ) valid=YES;
            break;
        case '%':                               /* is char=numeric or space? */
            if( (ch>='0' && ch<='9') || ch==' ' ) valid=YES;
            break;
        case 'A':                               /* is char type = alpha?     */
        case 'L':                               /* is type = tolower alpha?  */
        case 'M':                               /* is type = tomixed alpha?  */
        case 'U':                               /* is type = toupper alpha?  */
            if( isalpha(ch) || ch==' ' ) valid=YES;
            break;
        case 'D':
            if( isdigit(ch) || ch=='-' || ch=='/' ) valid=YES;
            break;
        case 'F':                   /* legal file name character      */
            if(strchr(bad_filechars,ch)==NULL) valid=YES;
            break;
        case 'W':                   /* file name character w/wildcard */
            if(strchr(bad_filechars+2,ch)==NULL) valid=YES;
            break;
        case 'H':                           /* is char type = hexadecimal? */
            if( isdigit(ch) || (ch>='A'&&ch<='F') || (ch>='a'&&ch<='f') )
                valid=YES;
            break;
        case 'T':                               /* is char type = phone num? */
            if( isdigit(ch) || ch=='(' || ch==')' || ch=='-' || ch==' ' )
                valid=YES;
            break;
        case 'P':                               /* is char type = password?  */
        case 'X':                               /* is char type = alphanum?  */
            if( isalnum(ch) || ch==' ' ) valid=YES;
            break;
        case 'Y':                               /* is char type = Yes/No?    */
            if( ch=='Y' || ch=='N' || ch=='y' || ch=='n' ) valid=YES;
            break;
        case '*':                               /* is char type = printable? */
            if(isprint(ch)) valid=YES;
            break;
        case '?':                               /* is char type = anything?  */
            valid=YES;                          
            break;
        default:                                /* invalid char type         */
            return(-1);
    }
    return(valid);
}