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/* $OpenBSD: fty_alnum.c,v 1.4 1998/07/24 02:37:41 millert Exp $ */
/*
* THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
* You may freely copy it for use as a template for your own field types.
* If you develop a field type that might be of general use, please send
* it back to the ncurses maintainers for inclusion in the next version.
*/
/***************************************************************************
* *
* Author : Juergen Pfeifer, Juergen.Pfeifer@T-Online.de *
* *
***************************************************************************/
#include "form.priv.h"
MODULE_ID("$From: fty_alnum.c,v 1.7 1997/10/18 19:33:55 tom Exp $")
typedef struct {
int width;
} alnumARG;
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Make_AlphaNumeric_Type(va_list *ap)
|
| Description : Allocate structure for alphanumeric type argument.
|
| Return Values : Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *Make_AlphaNumeric_Type(va_list * ap)
{
alnumARG *argp = (alnumARG *)malloc(sizeof(alnumARG));
if (argp)
argp->width = va_arg(*ap,int);
return ((void *)argp);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Copy_AlphaNumericType(const void *argp)
|
| Description : Copy structure for alphanumeric type argument.
|
| Return Values : Pointer to argument structure or NULL on error.
+--------------------------------------------------------------------------*/
static void *Copy_AlphaNumeric_Type(const void *argp)
{
const alnumARG *ap = (const alnumARG *)argp;
alnumARG *result = (alnumARG *)malloc(sizeof(alnumARG));
if (result)
*result = *ap;
return ((void *)result);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void Free_AlphaNumeric_Type(void *argp)
|
| Description : Free structure for alphanumeric type argument.
|
| Return Values : -
+--------------------------------------------------------------------------*/
static void Free_AlphaNumeric_Type(void * argp)
{
if (argp)
free(argp);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_AlphaNumeric_Field(
| FIELD *field,
| const void *argp)
|
| Description : Validate buffer content to be a valid alphanumeric value
|
| Return Values : TRUE - field is valid
| FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool Check_AlphaNumeric_Field(FIELD * field, const void * argp)
{
int width = ((const alnumARG *)argp)->width;
unsigned char *bp = (unsigned char *)field_buffer(field,0);
int l = -1;
unsigned char *s;
while(*bp && *bp==' ')
bp++;
if (*bp)
{
s = bp;
while(*bp && isalnum(*bp))
bp++;
l = (int)(bp-s);
while(*bp && *bp==' ')
bp++;
}
return ((*bp || (l < width)) ? FALSE : TRUE);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_AlphaNumeric_Character(
| int c,
| const void *argp )
|
| Description : Check a character for the alphanumeric type.
|
| Return Values : TRUE - character is valid
| FALSE - character is invalid
+--------------------------------------------------------------------------*/
static bool Check_AlphaNumeric_Character(int c, const void * argp GCC_UNUSED)
{
return (isalnum(c) ? TRUE : FALSE);
}
static FIELDTYPE typeALNUM = {
_HAS_ARGS | _RESIDENT,
1, /* this is mutable, so we can't be const */
(FIELDTYPE *)0,
(FIELDTYPE *)0,
Make_AlphaNumeric_Type,
Copy_AlphaNumeric_Type,
Free_AlphaNumeric_Type,
Check_AlphaNumeric_Field,
Check_AlphaNumeric_Character,
NULL,
NULL
};
FIELDTYPE* TYPE_ALNUM = &typeALNUM;
/* fty_alnum.c ends here */
|
