1 /**************************************************************************** 2 * Copyright 2019,2020 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 1.36 2020/12/12 01:15:37 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 * 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 * 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 * 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 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 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 double val = 0.0; 192 struct lconv *L = argn->L; 193 char buf[64]; 194 bool result = FALSE; 195 196 while (*bp && *bp == ' ') 197 bp++; 198 if (*bp) 199 { 200 if (*bp == '-' || *bp == '+') 201 bp++; 202 #if USE_WIDEC_SUPPORT 203 if (*bp) 204 { 205 bool blank = FALSE; 206 int state = 0; 207 int len; 208 int n; 209 wchar_t *list = _nc_Widen_String((char *)bp, &len); 210 211 if (list != 0) 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 val = atof(s); 269 if (low < high) 270 { 271 if (val < low || val > high) 272 result = FALSE; 273 } 274 if (result) 275 { 276 _nc_SPRINTF(buf, _nc_SLIMIT(sizeof(buf)) 277 "%.*f", (prec > 0 ? prec : 0), val); 278 set_field_buffer(field, 0, buf); 279 } 280 } 281 } 282 return (result); 283 } 284 285 /*--------------------------------------------------------------------------- 286 | Facility : libnform 287 | Function : static bool Check_This_Character( 288 | int c, 289 | const void * argp) 290 | 291 | Description : Check a character for the numeric type. 292 | 293 | Return Values : TRUE - character is valid 294 | FALSE - character is invalid 295 +--------------------------------------------------------------------------*/ 296 static bool 297 Check_This_Character(int c, const void *argp) 298 { 299 const thisARG *argn = (const thisARG *)argp; 300 struct lconv *L = argn->L; 301 302 return ((isDigit(c) || 303 c == '+' || 304 c == '-' || 305 isDecimalPoint(c)) 306 ? TRUE 307 : FALSE); 308 } 309 310 static FIELDTYPE typeTHIS = 311 { 312 _HAS_ARGS | _RESIDENT, 313 1, /* this is mutable, so we can't be const */ 314 (FIELDTYPE *)0, 315 (FIELDTYPE *)0, 316 Make_This_Type, 317 Copy_This_Type, 318 Free_This_Type, 319 INIT_FT_FUNC(Check_This_Field), 320 INIT_FT_FUNC(Check_This_Character), 321 INIT_FT_FUNC(NULL), 322 INIT_FT_FUNC(NULL), 323 #if NCURSES_INTEROP_FUNCS 324 Generic_This_Type 325 #endif 326 }; 327 328 FORM_EXPORT_VAR(FIELDTYPE *) TYPE_NUMERIC = &typeTHIS; 329 330 #if NCURSES_INTEROP_FUNCS 331 /* The next routines are to simplify the use of ncurses from 332 programming languages with restrictions on interop with C level 333 constructs (e.g. variable access or va_list + ellipsis constructs) 334 */ 335 FORM_EXPORT(FIELDTYPE *) 336 _nc_TYPE_NUMERIC(void) 337 { 338 return TYPE_NUMERIC; 339 } 340 #endif 341 342 /* fty_num.c ends here */ 343