| Current Path : /usr/src/contrib/ncurses/form/ |
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| Current File : //usr/src/contrib/ncurses/form/fty_num.c |
/****************************************************************************
* Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* Except as contained in this notice, the name(s) of the above copyright *
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****************************************************************************/
/***************************************************************************
* *
* Author : Juergen Pfeifer *
* *
***************************************************************************/
#include "form.priv.h"
MODULE_ID("$Id: fty_num.c,v 1.25 2007/10/13 19:32:54 tom Exp $")
#if HAVE_LOCALE_H
#include <locale.h>
#endif
#if HAVE_LOCALE_H
#define isDecimalPoint(c) ((c) == ((L && L->decimal_point) ? *(L->decimal_point) : '.'))
#else
#define isDecimalPoint(c) ((c) == '.')
#endif
#if USE_WIDEC_SUPPORT
#define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
#else
#define isDigit(c) isdigit(UChar(c))
#endif
#define thisARG numericARG
typedef struct
{
int precision;
double low;
double high;
struct lconv *L;
}
thisARG;
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Make_This_Type(va_list * ap)
|
| Description : Allocate structure for numeric type argument.
|
| Return Values : Pointer to argument structure or NULL on error
+--------------------------------------------------------------------------*/
static void *
Make_This_Type(va_list *ap)
{
thisARG *argn = typeMalloc(thisARG, 1);
if (argn)
{
T((T_CREATE("thisARG %p"), argn));
argn->precision = va_arg(*ap, int);
argn->low = va_arg(*ap, double);
argn->high = va_arg(*ap, double);
#if HAVE_LOCALE_H
argn->L = localeconv();
#else
argn->L = NULL;
#endif
}
return (void *)argn;
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void *Copy_This_Type(const void * argp)
|
| Description : Copy structure for numeric type argument.
|
| Return Values : Pointer to argument structure or NULL on error.
+--------------------------------------------------------------------------*/
static void *
Copy_This_Type(const void *argp)
{
const thisARG *ap = (const thisARG *)argp;
thisARG *result = (thisARG *) 0;
if (argp)
{
result = typeMalloc(thisARG, 1);
if (result)
{
T((T_CREATE("thisARG %p"), result));
*result = *ap;
}
}
return (void *)result;
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static void Free_This_Type(void * argp)
|
| Description : Free structure for numeric type argument.
|
| Return Values : -
+--------------------------------------------------------------------------*/
static void
Free_This_Type(void *argp)
{
if (argp)
free(argp);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_This_Field(FIELD * field,
| const void * argp)
|
| Description : Validate buffer content to be a valid numeric value
|
| Return Values : TRUE - field is valid
| FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool
Check_This_Field(FIELD *field, const void *argp)
{
const thisARG *argn = (const thisARG *)argp;
double low = argn->low;
double high = argn->high;
int prec = argn->precision;
unsigned char *bp = (unsigned char *)field_buffer(field, 0);
char *s = (char *)bp;
double val = 0.0;
struct lconv *L = argn->L;
char buf[64];
bool result = FALSE;
while (*bp && *bp == ' ')
bp++;
if (*bp)
{
if (*bp == '-' || *bp == '+')
bp++;
#if USE_WIDEC_SUPPORT
if (*bp)
{
bool blank = FALSE;
int state = 0;
int len;
int n;
wchar_t *list = _nc_Widen_String((char *)bp, &len);
if (list != 0)
{
result = TRUE;
for (n = 0; n < len; ++n)
{
if (blank)
{
if (list[n] != ' ')
{
result = FALSE;
break;
}
}
else if (list[n] == ' ')
{
blank = TRUE;
}
else if (isDecimalPoint(list[n]))
{
if (++state > 1)
{
result = FALSE;
break;
}
}
else if (!isDigit(list[n]))
{
result = FALSE;
break;
}
}
free(list);
}
}
#else
while (*bp)
{
if (!isdigit(UChar(*bp)))
break;
bp++;
}
if (isDecimalPoint(*bp))
{
bp++;
while (*bp)
{
if (!isdigit(UChar(*bp)))
break;
bp++;
}
}
while (*bp && *bp == ' ')
bp++;
result = (*bp == '\0');
#endif
if (result)
{
val = atof(s);
if (low < high)
{
if (val < low || val > high)
result = FALSE;
}
if (result)
{
sprintf(buf, "%.*f", (prec > 0 ? prec : 0), val);
set_field_buffer(field, 0, buf);
}
}
}
return (result);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_This_Character(
| int c,
| const void * argp)
|
| Description : Check a character for the numeric type.
|
| Return Values : TRUE - character is valid
| FALSE - character is invalid
+--------------------------------------------------------------------------*/
static bool
Check_This_Character(int c, const void *argp)
{
const thisARG *argn = (const thisARG *)argp;
struct lconv *L = argn->L;
return ((isDigit(c) ||
c == '+' ||
c == '-' ||
isDecimalPoint(c))
? TRUE
: FALSE);
}
static FIELDTYPE typeTHIS =
{
_HAS_ARGS | _RESIDENT,
1, /* this is mutable, so we can't be const */
(FIELDTYPE *)0,
(FIELDTYPE *)0,
Make_This_Type,
Copy_This_Type,
Free_This_Type,
Check_This_Field,
Check_This_Character,
NULL,
NULL
};
NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_NUMERIC = &typeTHIS;
/* fty_num.c ends here */