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 39 MODULE_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 59 typedef struct 60 { 61 int precision; 62 double low; 63 double high; 64 struct lconv *L; 65 } 66 thisARG; 67 68 typedef struct 69 { 70 int precision; 71 double low; 72 double high; 73 } 74 thisPARM; 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 +--------------------------------------------------------------------------*/ 84 static void * 85 Generic_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 +--------------------------------------------------------------------------*/ 119 static void * 120 Make_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 +--------------------------------------------------------------------------*/ 139 static void * 140 Copy_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 +--------------------------------------------------------------------------*/ 166 static void 167 Free_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 +--------------------------------------------------------------------------*/ 183 static bool 184 Check_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 +--------------------------------------------------------------------------*/ 299 static bool 300 Check_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 } 312 313 static 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 }; 330 331 FORM_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 */ 338 FORM_EXPORT(FIELDTYPE *) 339 _nc_TYPE_NUMERIC(void) 340 { 341 return TYPE_NUMERIC; 342 } 343 #endif 344 345 /* fty_num.c ends here */ 346