1 /****************************************************************************
2 * Copyright 2019-2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2010,2012 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /***************************************************************************
31 * *
32 * Author : Juergen Pfeifer *
33 * *
34 ***************************************************************************/
35
36 #include "form.priv.h"
37
38 MODULE_ID("$Id: fty_num.c,v 1.37 2021/03/27 23:49:58 tom Exp $")
39
40 #if HAVE_LOCALE_H
41 #include <locale.h>
42 #endif
43
44 #if HAVE_LOCALE_H && HAVE_LOCALECONV
45 #define isDecimalPoint(c) ((c) == ((L && L->decimal_point) ? *(L->decimal_point) : '.'))
46 #else
47 #define isDecimalPoint(c) ((c) == '.')
48 #endif
49
50 #if USE_WIDEC_SUPPORT
51 #define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
52 #else
53 #define isDigit(c) isdigit(UChar(c))
54 #endif
55
56 #define thisARG numericARG
57
58 typedef struct
59 {
60 int precision;
61 double low;
62 double high;
63 struct lconv *L;
64 }
65 thisARG;
66
67 typedef struct
68 {
69 int precision;
70 double low;
71 double high;
72 }
73 thisPARM;
74
75 /*---------------------------------------------------------------------------
76 | Facility : libnform
77 | Function : static void *Generic_This_Type(void * arg)
78 |
79 | Description : Allocate structure for numeric type argument.
80 |
81 | Return Values : Pointer to argument structure or NULL on error
82 +--------------------------------------------------------------------------*/
83 static void *
Generic_This_Type(void * arg)84 Generic_This_Type(void *arg)
85 {
86 thisARG *argn = (thisARG *)0;
87 thisPARM *args = (thisPARM *)arg;
88
89 if (args)
90 {
91 argn = typeMalloc(thisARG, 1);
92
93 if (argn)
94 {
95 T((T_CREATE("thisARG %p"), (void *)argn));
96 argn->precision = args->precision;
97 argn->low = args->low;
98 argn->high = args->high;
99
100 #if HAVE_LOCALE_H && HAVE_LOCALECONV
101 argn->L = localeconv();
102 #else
103 argn->L = NULL;
104 #endif
105 }
106 }
107 return (void *)argn;
108 }
109
110 /*---------------------------------------------------------------------------
111 | Facility : libnform
112 | Function : static void *Make_This_Type(va_list * ap)
113 |
114 | Description : Allocate structure for numeric type argument.
115 |
116 | Return Values : Pointer to argument structure or NULL on error
117 +--------------------------------------------------------------------------*/
118 static void *
Make_This_Type(va_list * ap)119 Make_This_Type(va_list *ap)
120 {
121 thisPARM arg;
122
123 arg.precision = va_arg(*ap, int);
124 arg.low = va_arg(*ap, double);
125 arg.high = va_arg(*ap, double);
126
127 return Generic_This_Type((void *)&arg);
128 }
129
130 /*---------------------------------------------------------------------------
131 | Facility : libnform
132 | Function : static void *Copy_This_Type(const void * argp)
133 |
134 | Description : Copy structure for numeric type argument.
135 |
136 | Return Values : Pointer to argument structure or NULL on error.
137 +--------------------------------------------------------------------------*/
138 static void *
Copy_This_Type(const void * argp)139 Copy_This_Type(const void *argp)
140 {
141 const thisARG *ap = (const thisARG *)argp;
142 thisARG *result = (thisARG *)0;
143
144 if (argp)
145 {
146 result = typeMalloc(thisARG, 1);
147
148 if (result)
149 {
150 T((T_CREATE("thisARG %p"), (void *)result));
151 *result = *ap;
152 }
153 }
154 return (void *)result;
155 }
156
157 /*---------------------------------------------------------------------------
158 | Facility : libnform
159 | Function : static void Free_This_Type(void * argp)
160 |
161 | Description : Free structure for numeric type argument.
162 |
163 | Return Values : -
164 +--------------------------------------------------------------------------*/
165 static void
Free_This_Type(void * argp)166 Free_This_Type(void *argp)
167 {
168 if (argp)
169 free(argp);
170 }
171
172 /*---------------------------------------------------------------------------
173 | Facility : libnform
174 | Function : static bool Check_This_Field(FIELD * field,
175 | const void * argp)
176 |
177 | Description : Validate buffer content to be a valid numeric value
178 |
179 | Return Values : TRUE - field is valid
180 | FALSE - field is invalid
181 +--------------------------------------------------------------------------*/
182 static bool
Check_This_Field(FIELD * field,const void * argp)183 Check_This_Field(FIELD *field, const void *argp)
184 {
185 const thisARG *argn = (const thisARG *)argp;
186 double low = argn->low;
187 double high = argn->high;
188 int prec = argn->precision;
189 unsigned char *bp = (unsigned char *)field_buffer(field, 0);
190 char *s = (char *)bp;
191 struct lconv *L = argn->L;
192 bool result = FALSE;
193
194 while (*bp == ' ')
195 bp++;
196 if (*bp)
197 {
198 if (*bp == '-' || *bp == '+')
199 bp++;
200 #if USE_WIDEC_SUPPORT
201 if (*bp)
202 {
203 int len;
204 wchar_t *list = _nc_Widen_String((char *)bp, &len);
205
206 if (list != 0)
207 {
208 bool blank = FALSE;
209 int state = 0;
210 int n;
211
212 result = TRUE;
213 for (n = 0; n < len; ++n)
214 {
215 if (blank)
216 {
217 if (list[n] != ' ')
218 {
219 result = FALSE;
220 break;
221 }
222 }
223 else if (list[n] == ' ')
224 {
225 blank = TRUE;
226 }
227 else if (isDecimalPoint(list[n]))
228 {
229 if (++state > 1)
230 {
231 result = FALSE;
232 break;
233 }
234 }
235 else if (!isDigit(list[n]))
236 {
237 result = FALSE;
238 break;
239 }
240 }
241 free(list);
242 }
243 }
244 #else
245 while (*bp)
246 {
247 if (!isdigit(UChar(*bp)))
248 break;
249 bp++;
250 }
251 if (isDecimalPoint(*bp))
252 {
253 bp++;
254 while (*bp)
255 {
256 if (!isdigit(UChar(*bp)))
257 break;
258 bp++;
259 }
260 }
261 while (*bp && *bp == ' ')
262 bp++;
263 result = (*bp == '\0');
264 #endif
265 if (result)
266 {
267 double val = atof(s);
268
269 if (low < high)
270 {
271 if (val < low || val > high)
272 result = FALSE;
273 }
274 if (result)
275 {
276 char buf[64];
277
278 _nc_SPRINTF(buf, _nc_SLIMIT(sizeof(buf))
279 "%.*f", (prec > 0 ? prec : 0), val);
280 set_field_buffer(field, 0, buf);
281 }
282 }
283 }
284 return (result);
285 }
286
287 /*---------------------------------------------------------------------------
288 | Facility : libnform
289 | Function : static bool Check_This_Character(
290 | int c,
291 | const void * argp)
292 |
293 | Description : Check a character for the numeric type.
294 |
295 | Return Values : TRUE - character is valid
296 | FALSE - character is invalid
297 +--------------------------------------------------------------------------*/
298 static bool
Check_This_Character(int c,const void * argp)299 Check_This_Character(int c, const void *argp)
300 {
301 const thisARG *argn = (const thisARG *)argp;
302 struct lconv *L = argn->L;
303
304 return ((isDigit(c) ||
305 c == '+' ||
306 c == '-' ||
307 isDecimalPoint(c))
308 ? TRUE
309 : FALSE);
310 }
311
312 static FIELDTYPE typeTHIS =
313 {
314 _HAS_ARGS | _RESIDENT,
315 1, /* this is mutable, so we can't be const */
316 (FIELDTYPE *)0,
317 (FIELDTYPE *)0,
318 Make_This_Type,
319 Copy_This_Type,
320 Free_This_Type,
321 INIT_FT_FUNC(Check_This_Field),
322 INIT_FT_FUNC(Check_This_Character),
323 INIT_FT_FUNC(NULL),
324 INIT_FT_FUNC(NULL),
325 #if NCURSES_INTEROP_FUNCS
326 Generic_This_Type
327 #endif
328 };
329
330 FORM_EXPORT_VAR(FIELDTYPE *) TYPE_NUMERIC = &typeTHIS;
331
332 #if NCURSES_INTEROP_FUNCS
333 /* The next routines are to simplify the use of ncurses from
334 programming languages with restrictions on interop with C level
335 constructs (e.g. variable access or va_list + ellipsis constructs)
336 */
337 FORM_EXPORT(FIELDTYPE *)
_nc_TYPE_NUMERIC(void)338 _nc_TYPE_NUMERIC(void)
339 {
340 return TYPE_NUMERIC;
341 }
342 #endif
343
344 /* fty_num.c ends here */
345