1 /****************************************************************************
2 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29 /***************************************************************************
30 * *
31 * Author : Juergen Pfeifer *
32 * *
33 ***************************************************************************/
34
35 #include "form.priv.h"
36
37 MODULE_ID("$Id: fty_num.c,v 1.25 2007/10/13 19:32:54 tom Exp $")
38
39 #if HAVE_LOCALE_H
40 #include <locale.h>
41 #endif
42
43 #if HAVE_LOCALE_H
44 #define isDecimalPoint(c) ((c) == ((L && L->decimal_point) ? *(L->decimal_point) : '.'))
45 #else
46 #define isDecimalPoint(c) ((c) == '.')
47 #endif
48
49 #if USE_WIDEC_SUPPORT
50 #define isDigit(c) (iswdigit((wint_t)(c)) || isdigit(UChar(c)))
51 #else
52 #define isDigit(c) isdigit(UChar(c))
53 #endif
54
55 #define thisARG numericARG
56
57 typedef struct
58 {
59 int precision;
60 double low;
61 double high;
62 struct lconv *L;
63 }
64 thisARG;
65
66 /*---------------------------------------------------------------------------
67 | Facility : libnform
68 | Function : static void *Make_This_Type(va_list * ap)
69 |
70 | Description : Allocate structure for numeric type argument.
71 |
72 | Return Values : Pointer to argument structure or NULL on error
73 +--------------------------------------------------------------------------*/
74 static void *
Make_This_Type(va_list * ap)75 Make_This_Type(va_list *ap)
76 {
77 thisARG *argn = typeMalloc(thisARG, 1);
78
79 if (argn)
80 {
81 T((T_CREATE("thisARG %p"), argn));
82 argn->precision = va_arg(*ap, int);
83 argn->low = va_arg(*ap, double);
84 argn->high = va_arg(*ap, double);
85
86 #if HAVE_LOCALE_H
87 argn->L = localeconv();
88 #else
89 argn->L = NULL;
90 #endif
91 }
92 return (void *)argn;
93 }
94
95 /*---------------------------------------------------------------------------
96 | Facility : libnform
97 | Function : static void *Copy_This_Type(const void * argp)
98 |
99 | Description : Copy structure for numeric type argument.
100 |
101 | Return Values : Pointer to argument structure or NULL on error.
102 +--------------------------------------------------------------------------*/
103 static void *
Copy_This_Type(const void * argp)104 Copy_This_Type(const void *argp)
105 {
106 const thisARG *ap = (const thisARG *)argp;
107 thisARG *result = (thisARG *) 0;
108
109 if (argp)
110 {
111 result = typeMalloc(thisARG, 1);
112 if (result)
113 {
114 T((T_CREATE("thisARG %p"), result));
115 *result = *ap;
116 }
117 }
118 return (void *)result;
119 }
120
121 /*---------------------------------------------------------------------------
122 | Facility : libnform
123 | Function : static void Free_This_Type(void * argp)
124 |
125 | Description : Free structure for numeric type argument.
126 |
127 | Return Values : -
128 +--------------------------------------------------------------------------*/
129 static void
Free_This_Type(void * argp)130 Free_This_Type(void *argp)
131 {
132 if (argp)
133 free(argp);
134 }
135
136 /*---------------------------------------------------------------------------
137 | Facility : libnform
138 | Function : static bool Check_This_Field(FIELD * field,
139 | const void * argp)
140 |
141 | Description : Validate buffer content to be a valid numeric value
142 |
143 | Return Values : TRUE - field is valid
144 | FALSE - field is invalid
145 +--------------------------------------------------------------------------*/
146 static bool
Check_This_Field(FIELD * field,const void * argp)147 Check_This_Field(FIELD *field, const void *argp)
148 {
149 const thisARG *argn = (const thisARG *)argp;
150 double low = argn->low;
151 double high = argn->high;
152 int prec = argn->precision;
153 unsigned char *bp = (unsigned char *)field_buffer(field, 0);
154 char *s = (char *)bp;
155 double val = 0.0;
156 struct lconv *L = argn->L;
157 char buf[64];
158 bool result = FALSE;
159
160 while (*bp && *bp == ' ')
161 bp++;
162 if (*bp)
163 {
164 if (*bp == '-' || *bp == '+')
165 bp++;
166 #if USE_WIDEC_SUPPORT
167 if (*bp)
168 {
169 bool blank = FALSE;
170 int state = 0;
171 int len;
172 int n;
173 wchar_t *list = _nc_Widen_String((char *)bp, &len);
174
175 if (list != 0)
176 {
177 result = TRUE;
178 for (n = 0; n < len; ++n)
179 {
180 if (blank)
181 {
182 if (list[n] != ' ')
183 {
184 result = FALSE;
185 break;
186 }
187 }
188 else if (list[n] == ' ')
189 {
190 blank = TRUE;
191 }
192 else if (isDecimalPoint(list[n]))
193 {
194 if (++state > 1)
195 {
196 result = FALSE;
197 break;
198 }
199 }
200 else if (!isDigit(list[n]))
201 {
202 result = FALSE;
203 break;
204 }
205 }
206 free(list);
207 }
208 }
209 #else
210 while (*bp)
211 {
212 if (!isdigit(UChar(*bp)))
213 break;
214 bp++;
215 }
216 if (isDecimalPoint(*bp))
217 {
218 bp++;
219 while (*bp)
220 {
221 if (!isdigit(UChar(*bp)))
222 break;
223 bp++;
224 }
225 }
226 while (*bp && *bp == ' ')
227 bp++;
228 result = (*bp == '\0');
229 #endif
230 if (result)
231 {
232 val = atof(s);
233 if (low < high)
234 {
235 if (val < low || val > high)
236 result = FALSE;
237 }
238 if (result)
239 {
240 sprintf(buf, "%.*f", (prec > 0 ? prec : 0), val);
241 set_field_buffer(field, 0, buf);
242 }
243 }
244 }
245 return (result);
246 }
247
248 /*---------------------------------------------------------------------------
249 | Facility : libnform
250 | Function : static bool Check_This_Character(
251 | int c,
252 | const void * argp)
253 |
254 | Description : Check a character for the numeric type.
255 |
256 | Return Values : TRUE - character is valid
257 | FALSE - character is invalid
258 +--------------------------------------------------------------------------*/
259 static bool
Check_This_Character(int c,const void * argp)260 Check_This_Character(int c, const void *argp)
261 {
262 const thisARG *argn = (const thisARG *)argp;
263 struct lconv *L = argn->L;
264
265 return ((isDigit(c) ||
266 c == '+' ||
267 c == '-' ||
268 isDecimalPoint(c))
269 ? TRUE
270 : FALSE);
271 }
272
273 static FIELDTYPE typeTHIS =
274 {
275 _HAS_ARGS | _RESIDENT,
276 1, /* this is mutable, so we can't be const */
277 (FIELDTYPE *)0,
278 (FIELDTYPE *)0,
279 Make_This_Type,
280 Copy_This_Type,
281 Free_This_Type,
282 Check_This_Field,
283 Check_This_Character,
284 NULL,
285 NULL
286 };
287
288 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_NUMERIC = &typeTHIS;
289
290 /* fty_num.c ends here */
291