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/* $OpenBSD: fty_alpha.c,v 1.6 2001/01/22 18:02:17 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@gmx.net *
* *
***************************************************************************/
#include "form.priv.h"
MODULE_ID("$From: fty_alpha.c,v 1.10 2000/12/09 23:46:12 tom Exp $")
typedef struct {
int width;
} alphaARG;
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Make_Alpha_Type(va_list *ap)
|
| Description : Allocate structure for alpha type argument.
|
| Return Values : Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *Make_Alpha_Type(va_list * ap)
{
alphaARG *argp = (alphaARG *)malloc(sizeof(alphaARG));
if (argp)
{
argp->width = va_arg(*ap,int);
}
return ((void *)argp);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Copy_Alpha_Type(const void * argp)
|
| Description : Copy structure for alpha type argument.
|
| Return Values : Pointer to argument structure or NULL on error.
+--------------------------------------------------------------------------*/
static void *Copy_Alpha_Type(const void * argp)
{
const alphaARG *ap = (const alphaARG *)argp;
alphaARG *result = (alphaARG *)malloc(sizeof(alphaARG));
if (result)
{
*result = *ap;
}
return ((void *)result);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void Free_Alpha_Type( void * argp )
|
| Description : Free structure for alpha type argument.
|
| Return Values : -
+--------------------------------------------------------------------------*/
static void Free_Alpha_Type(void * argp)
{
if (argp)
free(argp);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_Alpha_Field(
| FIELD * field,
| const void * argp)
|
| Description : Validate buffer content to be a valid alpha value
|
| Return Values : TRUE - field is valid
| FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool Check_Alpha_Field(FIELD * field, const void * argp)
{
int width = ((const alphaARG *)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 && isalpha(*bp))
bp++;
l = (int)(bp-s);
while(*bp && *bp==' ')
bp++;
}
return ((*bp || (l < width)) ? FALSE : TRUE);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_Alpha_Character(
| int c,
| const void * argp)
|
| Description : Check a character for the alpha type.
|
| Return Values : TRUE - character is valid
| FALSE - character is invalid
+--------------------------------------------------------------------------*/
static bool Check_Alpha_Character(int c, const void * argp GCC_UNUSED)
{
return (isalpha(c) ? TRUE : FALSE);
}
static FIELDTYPE typeALPHA = {
_HAS_ARGS | _RESIDENT,
1, /* this is mutable, so we can't be const */
(FIELDTYPE *)0,
(FIELDTYPE *)0,
Make_Alpha_Type,
Copy_Alpha_Type,
Free_Alpha_Type,
Check_Alpha_Field,
Check_Alpha_Character,
NULL,
NULL
};
NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ALPHA = &typeALPHA;
/* fty_alpha.c ends here */
|
