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1/* $OpenBSD: fty_num.c,v 1.10 2023/10/17 09:52:10 nicm Exp $ */
2/****************************************************************************
3 * Copyright 2019-2020,2021 Thomas E. Dickey *
4 * Copyright 1998-2010,2012 Free Software Foundation, Inc. *
5 * *
6 * Permission is hereby granted, free of charge, to any person obtaining a *
7 * copy of this software and associated documentation files (the *
8 * "Software"), to deal in the Software without restriction, including *
9 * without limitation the rights to use, copy, modify, merge, publish, *
10 * distribute, distribute with modifications, sublicense, and/or sell *
11 * copies of the Software, and to permit persons to whom the Software is *
12 * furnished to do so, subject to the following conditions: *
13 * *
14 * The above copyright notice and this permission notice shall be included *
15 * in all copies or substantial portions of the Software. *
16 * *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24 * *
25 * Except as contained in this notice, the name(s) of the above copyright *
26 * holders shall not be used in advertising or otherwise to promote the *
27 * sale, use or other dealings in this Software without prior written *
28 * authorization. *
29 ****************************************************************************/
30
31/***************************************************************************
32* *
33* Author : Juergen Pfeifer *
34* *
35***************************************************************************/
36
37#include "form.priv.h"
38
39MODULE_ID("$Id: fty_num.c,v 1.10 2023/10/17 09:52:10 nicm Exp $")
40
41#if HAVE_LOCALE_H
42#include <locale.h>
43#endif
44
45#if HAVE_LOCALE_H && HAVE_LOCALECONV
46#define isDecimalPoint(c) ((c) == ((L && L->decimal_point) ? *(L->decimal_point) : '.'))
47#else
48#define isDecimalPoint(c) ((c) == '.')
49#endif
50
51#if USE_WIDEC_SUPPORT
52#define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
53#else
54#define isDigit(c) isdigit(UChar(c))
55#endif
56
57#define thisARG numericARG
58
59typedef struct
60 {
61 int precision;
62 double low;
63 double high;
64 struct lconv *L;
65 }
66thisARG;
67
68typedef struct
69 {
70 int precision;
71 double low;
72 double high;
73 }
74thisPARM;
75
76/*---------------------------------------------------------------------------
77| Facility : libnform
78| Function : static void *Generic_This_Type(void * arg)
79|
80| Description : Allocate structure for numeric type argument.
81|
82| Return Values : Pointer to argument structure or NULL on error
83+--------------------------------------------------------------------------*/
84static void *
85Generic_This_Type(void *arg)
86{
87 thisARG *argn = (thisARG *)0;
88 thisPARM *args = (thisPARM *)arg;
89
90 if (args)
91 {
92 argn = typeMalloc(thisARG, 1);
93
94 if (argn)
95 {
96 T((T_CREATE("thisARG %p"), (void *)argn));
97 argn->precision = args->precision;
98 argn->low = args->low;
99 argn->high = args->high;
100
101#if HAVE_LOCALE_H && HAVE_LOCALECONV
102 argn->L = localeconv();
103#else
104 argn->L = NULL;
105#endif
106 }
107 }
108 return (void *)argn;
109}
110
111/*---------------------------------------------------------------------------
112| Facility : libnform
113| Function : static void *Make_This_Type(va_list * ap)
114|
115| Description : Allocate structure for numeric type argument.
116|
117| Return Values : Pointer to argument structure or NULL on error
118+--------------------------------------------------------------------------*/
119static void *
120Make_This_Type(va_list *ap)
121{
122 thisPARM arg;
123
124 arg.precision = va_arg(*ap, int);
125 arg.low = va_arg(*ap, double);
126 arg.high = va_arg(*ap, double);
127
128 return Generic_This_Type((void *)&arg);
129}
130
131/*---------------------------------------------------------------------------
132| Facility : libnform
133| Function : static void *Copy_This_Type(const void * argp)
134|
135| Description : Copy structure for numeric type argument.
136|
137| Return Values : Pointer to argument structure or NULL on error.
138+--------------------------------------------------------------------------*/
139static void *
140Copy_This_Type(const void *argp)
141{
142 const thisARG *ap = (const thisARG *)argp;
143 thisARG *result = (thisARG *)0;
144
145 if (argp)
146 {
147 result = typeMalloc(thisARG, 1);
148
149 if (result)
150 {
151 T((T_CREATE("thisARG %p"), (void *)result));
152 *result = *ap;
153 }
154 }
155 return (void *)result;
156}
157
158/*---------------------------------------------------------------------------
159| Facility : libnform
160| Function : static void Free_This_Type(void * argp)
161|
162| Description : Free structure for numeric type argument.
163|
164| Return Values : -
165+--------------------------------------------------------------------------*/
166static void
167Free_This_Type(void *argp)
168{
169 if (argp)
170 free(argp);
171}
172
173/*---------------------------------------------------------------------------
174| Facility : libnform
175| Function : static bool Check_This_Field(FIELD * field,
176| const void * argp)
177|
178| Description : Validate buffer content to be a valid numeric value
179|
180| Return Values : TRUE - field is valid
181| FALSE - field is invalid
182+--------------------------------------------------------------------------*/
183static bool
184Check_This_Field(FIELD *field, const void *argp)
185{
186 const thisARG *argn = (const thisARG *)argp;
187 double low = argn->low;
188 double high = argn->high;
189 int prec = argn->precision;
190 unsigned char *bp = (unsigned char *)field_buffer(field, 0);
191 char *s = (char *)bp;
192 struct lconv *L = argn->L;
193 bool result = FALSE;
194
195 while (*bp == ' ')
196 bp++;
197 if (*bp)
198 {
199 if (*bp == '-' || *bp == '+')
200 bp++;
201#if USE_WIDEC_SUPPORT
202 if (*bp)
203 {
204 int len;
205 wchar_t *list = _nc_Widen_String((char *)bp, &len);
206
207 if (list != 0)
208 {
209 bool blank = FALSE;
210 int state = 0;
211 int n;
212
213 result = TRUE;
214 for (n = 0; n < len; ++n)
215 {
216 if (blank)
217 {
218 if (list[n] != ' ')
219 {
220 result = FALSE;
221 break;
222 }
223 }
224 else if (list[n] == ' ')
225 {
226 blank = TRUE;
227 }
228 else if (isDecimalPoint(list[n]))
229 {
230 if (++state > 1)
231 {
232 result = FALSE;
233 break;
234 }
235 }
236 else if (!isDigit(list[n]))
237 {
238 result = FALSE;
239 break;
240 }
241 }
242 free(list);
243 }
244 }
245#else
246 while (*bp)
247 {
248 if (!isdigit(UChar(*bp)))
249 break;
250 bp++;
251 }
252 if (isDecimalPoint(*bp))
253 {
254 bp++;
255 while (*bp)
256 {
257 if (!isdigit(UChar(*bp)))
258 break;
259 bp++;
260 }
261 }
262 while (*bp && *bp == ' ')
263 bp++;
264 result = (*bp == '\0');
265#endif
266 if (result)
267 {
268 double val = atof(s);
269
270 if (low < high)
271 {
272 if (val < low || val > high)
273 result = FALSE;
274 }
275 if (result)
276 {
277 char buf[64];
278
279 _nc_SPRINTF(buf, _nc_SLIMIT(sizeof(buf))
280 "%.*f", (prec > 0 ? prec : 0), val);
281 set_field_buffer(field, 0, buf);
282 }
283 }
284 }
285 return (result);
286}
287
288/*---------------------------------------------------------------------------
289| Facility : libnform
290| Function : static bool Check_This_Character(
291| int c,
292| const void * argp)
293|
294| Description : Check a character for the numeric type.
295|
296| Return Values : TRUE - character is valid
297| FALSE - character is invalid
298+--------------------------------------------------------------------------*/
299static bool
300Check_This_Character(int c, const void *argp)
301{
302 const thisARG *argn = (const thisARG *)argp;
303 struct lconv *L = argn->L;
304
305 return ((isDigit(c) ||
306 c == '+' ||
307 c == '-' ||
308 isDecimalPoint(c))
309 ? TRUE
310 : FALSE);
311}
312
313static FIELDTYPE typeTHIS =
314{
315 _HAS_ARGS | _RESIDENT,
316 1, /* this is mutable, so we can't be const */
317 (FIELDTYPE *)0,
318 (FIELDTYPE *)0,
319 Make_This_Type,
320 Copy_This_Type,
321 Free_This_Type,
322 INIT_FT_FUNC(Check_This_Field),
323 INIT_FT_FUNC(Check_This_Character),
324 INIT_FT_FUNC(NULL),
325 INIT_FT_FUNC(NULL),
326#if NCURSES_INTEROP_FUNCS
327 Generic_This_Type
328#endif
329};
330
331FORM_EXPORT_VAR(FIELDTYPE *) TYPE_NUMERIC = &typeTHIS;
332
333#if NCURSES_INTEROP_FUNCS
334/* The next routines are to simplify the use of ncurses from
335 programming languages with restrictions on interop with C level
336 constructs (e.g. variable access or va_list + ellipsis constructs)
337*/
338FORM_EXPORT(FIELDTYPE *)
339_nc_TYPE_NUMERIC(void)
340{
341 return TYPE_NUMERIC;
342}
343#endif
344
345/* fty_num.c ends here */