341 lines
9.2 KiB
C
341 lines
9.2 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2010,2012 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/***************************************************************************
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* *
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* Author : Juergen Pfeifer *
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* *
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***************************************************************************/
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#include "form.priv.h"
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MODULE_ID("$Id: fty_num.c,v 1.29 2012/02/23 10:02:15 tom Exp $")
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#if HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#if HAVE_LOCALE_H
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#define isDecimalPoint(c) ((c) == ((L && L->decimal_point) ? *(L->decimal_point) : '.'))
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#else
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#define isDecimalPoint(c) ((c) == '.')
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#endif
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#if USE_WIDEC_SUPPORT
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#define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
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#else
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#define isDigit(c) isdigit(UChar(c))
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#endif
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#define thisARG numericARG
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typedef struct
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{
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int precision;
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double low;
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double high;
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struct lconv *L;
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}
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thisARG;
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typedef struct
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{
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int precision;
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double low;
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double high;
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}
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thisPARM;
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Generic_This_Type(void * arg)
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| Description : Allocate structure for numeric 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 *
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Generic_This_Type(void *arg)
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{
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thisARG *argn = (thisARG *) 0;
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thisPARM *args = (thisPARM *) arg;
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if (args)
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{
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argn = typeMalloc(thisARG, 1);
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if (argn)
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{
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T((T_CREATE("thisARG %p"), (void *)argn));
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argn->precision = args->precision;
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argn->low = args->low;
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argn->high = args->high;
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#if HAVE_LOCALE_H
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argn->L = localeconv();
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#else
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argn->L = NULL;
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#endif
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}
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}
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return (void *)argn;
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Make_This_Type(va_list * ap)
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| Description : Allocate structure for numeric 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 *
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Make_This_Type(va_list *ap)
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{
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thisPARM arg;
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arg.precision = va_arg(*ap, int);
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arg.low = va_arg(*ap, double);
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arg.high = va_arg(*ap, double);
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return Generic_This_Type((void *)&arg);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static void *Copy_This_Type(const void * argp)
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| Description : Copy structure for numeric 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 *
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Copy_This_Type(const void *argp)
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{
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const thisARG *ap = (const thisARG *)argp;
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thisARG *result = (thisARG *) 0;
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if (argp)
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{
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result = typeMalloc(thisARG, 1);
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if (result)
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{
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T((T_CREATE("thisARG %p"), (void *)result));
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*result = *ap;
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}
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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_This_Type(void * argp)
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| Description : Free structure for numeric type argument.
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| Return Values : -
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+--------------------------------------------------------------------------*/
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static void
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Free_This_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_This_Field(FIELD * field,
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| const void * argp)
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| Description : Validate buffer content to be a valid numeric 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
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Check_This_Field(FIELD *field, const void *argp)
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{
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const thisARG *argn = (const thisARG *)argp;
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double low = argn->low;
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double high = argn->high;
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int prec = argn->precision;
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unsigned char *bp = (unsigned char *)field_buffer(field, 0);
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char *s = (char *)bp;
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double val = 0.0;
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struct lconv *L = argn->L;
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char buf[64];
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bool result = FALSE;
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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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if (*bp == '-' || *bp == '+')
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bp++;
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#if USE_WIDEC_SUPPORT
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if (*bp)
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{
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bool blank = FALSE;
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int state = 0;
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int len;
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int n;
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wchar_t *list = _nc_Widen_String((char *)bp, &len);
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if (list != 0)
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{
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result = TRUE;
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for (n = 0; n < len; ++n)
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{
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if (blank)
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{
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if (list[n] != ' ')
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{
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result = FALSE;
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break;
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}
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}
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else if (list[n] == ' ')
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{
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blank = TRUE;
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}
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else if (isDecimalPoint(list[n]))
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{
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if (++state > 1)
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{
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result = FALSE;
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break;
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}
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}
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else if (!isDigit(list[n]))
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{
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result = FALSE;
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break;
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}
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}
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free(list);
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}
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}
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#else
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while (*bp)
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{
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if (!isdigit(UChar(*bp)))
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break;
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bp++;
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}
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if (isDecimalPoint(*bp))
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{
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bp++;
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while (*bp)
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{
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if (!isdigit(UChar(*bp)))
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break;
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bp++;
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}
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}
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while (*bp && *bp == ' ')
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bp++;
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result = (*bp == '\0');
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#endif
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if (result)
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{
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val = atof(s);
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if (low < high)
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{
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if (val < low || val > high)
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result = FALSE;
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}
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if (result)
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{
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_nc_SPRINTF(buf, _nc_SLIMIT(sizeof(buf))
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"%.*f", (prec > 0 ? prec : 0), val);
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set_field_buffer(field, 0, buf);
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}
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}
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}
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return (result);
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}
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/*---------------------------------------------------------------------------
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| Facility : libnform
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| Function : static bool Check_This_Character(
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| int c,
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| const void * argp)
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| Description : Check a character for the numeric 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
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Check_This_Character(int c, const void *argp)
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{
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const thisARG *argn = (const thisARG *)argp;
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struct lconv *L = argn->L;
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return ((isDigit(c) ||
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c == '+' ||
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c == '-' ||
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isDecimalPoint(c))
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? TRUE
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: FALSE);
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}
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static FIELDTYPE typeTHIS =
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{
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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_This_Type,
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Copy_This_Type,
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Free_This_Type,
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INIT_FT_FUNC(Check_This_Field),
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INIT_FT_FUNC(Check_This_Character),
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INIT_FT_FUNC(NULL),
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INIT_FT_FUNC(NULL),
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#if NCURSES_INTEROP_FUNCS
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Generic_This_Type
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#endif
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};
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NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_NUMERIC = &typeTHIS;
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#if NCURSES_INTEROP_FUNCS
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/* The next routines are to simplify the use of ncurses from
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programming languages with restictions on interop with C level
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constructs (e.g. variable access or va_list + ellipsis constructs)
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*/
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NCURSES_EXPORT(FIELDTYPE *)
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_nc_TYPE_NUMERIC(void)
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{
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return TYPE_NUMERIC;
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}
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#endif
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/* fty_num.c ends here */
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