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139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
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/*
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* THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
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* You may freely copy it for use as a template for your own field types.
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* If you develop a field type that might be of general use, please send
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* it back to the ncurses maintainers for inclusion in the next version.
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*/
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/***************************************************************************
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* *
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* Author : Juergen Pfeifer, juergen.pfeifer@gmx.net *
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* *
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***************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: fty_alpha.c,v 1.10 2000/12/09 23:46:12 tom Exp $")
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typedef struct {
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int width;
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} alphaARG;
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Make_Alpha_Type(va_list *ap)
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| Description : Allocate structure for alpha type argument.
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| Return Values : Pointer to argument structure or NULL on error
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+--------------------------------------------------------------------------*/
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static void *Make_Alpha_Type(va_list * ap)
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{
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alphaARG *argp = (alphaARG *)malloc(sizeof(alphaARG));
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if (argp)
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{
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argp->width = va_arg(*ap,int);
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}
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return ((void *)argp);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Copy_Alpha_Type(const void * argp)
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| Description : Copy structure for alpha type argument.
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| Return Values : Pointer to argument structure or NULL on error.
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+--------------------------------------------------------------------------*/
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static void *Copy_Alpha_Type(const void * argp)
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{
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const alphaARG *ap = (const alphaARG *)argp;
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alphaARG *result = (alphaARG *)malloc(sizeof(alphaARG));
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if (result)
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{
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*result = *ap;
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}
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return ((void *)result);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void Free_Alpha_Type( void * argp )
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| Description : Free structure for alpha type argument.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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static void Free_Alpha_Type(void * argp)
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{
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if (argp)
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free(argp);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_Alpha_Field(
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| FIELD * field,
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| const void * argp)
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| Description : Validate buffer content to be a valid alpha value
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| Return Values : TRUE - field is valid
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| FALSE - field is invalid
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+--------------------------------------------------------------------------*/
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static bool Check_Alpha_Field(FIELD * field, const void * argp)
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{
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int width = ((const alphaARG *)argp)->width;
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unsigned char *bp = (unsigned char *)field_buffer(field,0);
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int l = -1;
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unsigned char *s;
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while(*bp && *bp==' ')
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bp++;
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if (*bp)
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{
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s = bp;
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while(*bp && isalpha(*bp))
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bp++;
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l = (int)(bp-s);
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while(*bp && *bp==' ')
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bp++;
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}
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return ((*bp || (l < width)) ? FALSE : TRUE);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_Alpha_Character(
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| int c,
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| const void * argp)
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| Description : Check a character for the alpha type.
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| Return Values : TRUE - character is valid
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| FALSE - character is invalid
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+--------------------------------------------------------------------------*/
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static bool Check_Alpha_Character(int c, const void * argp GCC_UNUSED)
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{
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return (isalpha(c) ? TRUE : FALSE);
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}
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static FIELDTYPE typeALPHA = {
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_HAS_ARGS | _RESIDENT,
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1, /* this is mutable, so we can't be const */
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(FIELDTYPE *)0,
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(FIELDTYPE *)0,
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Make_Alpha_Type,
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Copy_Alpha_Type,
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Free_Alpha_Type,
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Check_Alpha_Field,
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Check_Alpha_Character,
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NULL,
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NULL
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};
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NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_ALPHA = &typeALPHA;
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/* fty_alpha.c ends here */
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