1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2012,2014 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 * Author: Juergen Pfeifer, 1995,1997 * 32 ****************************************************************************/ 33 34 #include "form.priv.h" 35 36 MODULE_ID("$Id: fld_def.c,v 1.42 2020/02/02 23:34:34 tom Exp $") 37 38 /* this can't be readonly */ 39 static FIELD default_field = 40 { 41 0, /* status */ 42 0, /* rows */ 43 0, /* cols */ 44 0, /* frow */ 45 0, /* fcol */ 46 0, /* drows */ 47 0, /* dcols */ 48 0, /* maxgrow */ 49 0, /* nrow */ 50 0, /* nbuf */ 51 NO_JUSTIFICATION, /* just */ 52 0, /* page */ 53 0, /* index */ 54 (int)' ', /* pad */ 55 A_NORMAL, /* fore */ 56 A_NORMAL, /* back */ 57 STD_FIELD_OPTS, /* opts */ 58 (FIELD *)0, /* snext */ 59 (FIELD *)0, /* sprev */ 60 (FIELD *)0, /* link */ 61 (FORM *)0, /* form */ 62 (FIELDTYPE *)0, /* type */ 63 (char *)0, /* arg */ 64 (FIELD_CELL *)0, /* buf */ 65 (char *)0 /* usrptr */ 66 NCURSES_FIELD_EXTENSION 67 }; 68 69 NCURSES_EXPORT_VAR(FIELD *) _nc_Default_Field = &default_field; 70 71 /*--------------------------------------------------------------------------- 72 | Facility : libnform 73 | Function : TypeArgument *_nc_Make_Argument( 74 | const FIELDTYPE *typ, 75 | va_list *ap, 76 | int *err ) 77 | 78 | Description : Create an argument structure for the specified type. 79 | Use the type-dependent argument list to construct 80 | it. 81 | 82 | Return Values : Pointer to argument structure. Maybe NULL. 83 | In case of an error in *err an error counter is increased. 84 +--------------------------------------------------------------------------*/ 85 NCURSES_EXPORT(TypeArgument *) 86 _nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err) 87 { 88 TypeArgument *res = (TypeArgument *)0; 89 TypeArgument *p; 90 91 if (typ != 0 && (typ->status & _HAS_ARGS) != 0) 92 { 93 assert(err != 0 && ap != (va_list *)0); 94 if ((typ->status & _LINKED_TYPE) != 0) 95 { 96 p = typeMalloc(TypeArgument, 1); 97 98 if (p != 0) 99 { 100 p->left = _nc_Make_Argument(typ->left, ap, err); 101 p->right = _nc_Make_Argument(typ->right, ap, err); 102 return p; 103 } 104 else 105 { 106 *err += 1; 107 } 108 } 109 else 110 { 111 assert(typ->makearg != (void *)0); 112 if (!(res = (TypeArgument *)typ->makearg(ap))) 113 { 114 *err += 1; 115 } 116 } 117 } 118 return res; 119 } 120 121 /*--------------------------------------------------------------------------- 122 | Facility : libnform 123 | Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ, 124 | const TypeArgument *argp, 125 | int *err ) 126 | 127 | Description : Create a copy of an argument structure for the specified 128 | type. 129 | 130 | Return Values : Pointer to argument structure. Maybe NULL. 131 | In case of an error in *err an error counter is increased. 132 +--------------------------------------------------------------------------*/ 133 NCURSES_EXPORT(TypeArgument *) 134 _nc_Copy_Argument(const FIELDTYPE *typ, const TypeArgument *argp, int *err) 135 { 136 TypeArgument *res = (TypeArgument *)0; 137 TypeArgument *p; 138 139 if (typ != 0 && (typ->status & _HAS_ARGS) != 0) 140 { 141 assert(err != 0 && argp != 0); 142 if ((typ->status & _LINKED_TYPE) != 0) 143 { 144 p = typeMalloc(TypeArgument, 1); 145 146 if (p != 0) 147 { 148 p->left = _nc_Copy_Argument(typ, argp->left, err); 149 p->right = _nc_Copy_Argument(typ, argp->right, err); 150 return p; 151 } 152 *err += 1; 153 } 154 else 155 { 156 if (typ->copyarg != (void *)0) 157 { 158 if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp)))) 159 { 160 *err += 1; 161 } 162 } 163 else 164 { 165 res = (TypeArgument *)argp; 166 } 167 } 168 } 169 return res; 170 } 171 172 /*--------------------------------------------------------------------------- 173 | Facility : libnform 174 | Function : void _nc_Free_Argument(const FIELDTYPE *typ, 175 | TypeArgument * argp ) 176 | 177 | Description : Release memory associated with the argument structure 178 | for the given fieldtype. 179 | 180 | Return Values : - 181 +--------------------------------------------------------------------------*/ 182 NCURSES_EXPORT(void) 183 _nc_Free_Argument(const FIELDTYPE *typ, TypeArgument *argp) 184 { 185 if (typ != 0 && (typ->status & _HAS_ARGS) != 0) 186 { 187 if ((typ->status & _LINKED_TYPE) != 0) 188 { 189 if (argp != 0) 190 { 191 _nc_Free_Argument(typ->left, argp->left); 192 _nc_Free_Argument(typ->right, argp->right); 193 free(argp); 194 } 195 } 196 else 197 { 198 if (typ->freearg != (void *)0) 199 { 200 typ->freearg((void *)argp); 201 } 202 } 203 } 204 } 205 206 /*--------------------------------------------------------------------------- 207 | Facility : libnform 208 | Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src ) 209 | 210 | Description : Copy argument structure of field src to field dst 211 | 212 | Return Values : TRUE - copy worked 213 | FALSE - error occurred 214 +--------------------------------------------------------------------------*/ 215 NCURSES_EXPORT(bool) 216 _nc_Copy_Type(FIELD *dst, FIELD const *src) 217 { 218 int err = 0; 219 220 assert(dst != 0 && src != 0); 221 222 dst->type = src->type; 223 dst->arg = (void *)_nc_Copy_Argument(src->type, (TypeArgument *)(src->arg), &err); 224 225 if (err != 0) 226 { 227 _nc_Free_Argument(dst->type, (TypeArgument *)(dst->arg)); 228 dst->type = (FIELDTYPE *)0; 229 dst->arg = (void *)0; 230 return FALSE; 231 } 232 else 233 { 234 if (dst->type != 0) 235 { 236 dst->type->ref++; 237 } 238 return TRUE; 239 } 240 } 241 242 /*--------------------------------------------------------------------------- 243 | Facility : libnform 244 | Function : void _nc_Free_Type( FIELD *field ) 245 | 246 | Description : Release Argument structure for this field 247 | 248 | Return Values : - 249 +--------------------------------------------------------------------------*/ 250 NCURSES_EXPORT(void) 251 _nc_Free_Type(FIELD *field) 252 { 253 assert(field != 0); 254 if (field->type != 0) 255 { 256 field->type->ref--; 257 _nc_Free_Argument(field->type, (TypeArgument *)(field->arg)); 258 } 259 } 260 261 /*--------------------------------------------------------------------------- 262 | Facility : libnform 263 | Function : FIELD *new_field( int rows, int cols, 264 | int frow, int fcol, 265 | int nrow, int nbuf ) 266 | 267 | Description : Create a new field with this many 'rows' and 'cols', 268 | starting at 'frow/fcol' in the subwindow of the form. 269 | Allocate 'nrow' off-screen rows and 'nbuf' additional 270 | buffers. If an error occurs, errno is set to 271 | 272 | E_BAD_ARGUMENT - invalid argument 273 | E_SYSTEM_ERROR - system error 274 | 275 | Return Values : Pointer to the new field or NULL if failure. 276 +--------------------------------------------------------------------------*/ 277 NCURSES_EXPORT(FIELD *) 278 new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf) 279 { 280 static const FIELD_CELL blank = BLANK; 281 static const FIELD_CELL zeros = ZEROS; 282 283 FIELD *New_Field = (FIELD *)0; 284 int err = E_BAD_ARGUMENT; 285 286 T((T_CALLED("new_field(%d,%d,%d,%d,%d,%d)"), rows, cols, frow, fcol, nrow, nbuf)); 287 if (rows > 0 && 288 cols > 0 && 289 frow >= 0 && 290 fcol >= 0 && 291 nrow >= 0 && 292 nbuf >= 0 && 293 ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */ 294 (New_Field = typeMalloc(FIELD, 1)) != 0) 295 { 296 T((T_CREATE("field %p"), (void *)New_Field)); 297 *New_Field = default_field; 298 New_Field->rows = (short)rows; 299 New_Field->cols = (short)cols; 300 New_Field->drows = rows + nrow; 301 New_Field->dcols = cols; 302 New_Field->frow = (short)frow; 303 New_Field->fcol = (short)fcol; 304 New_Field->nrow = nrow; 305 New_Field->nbuf = (short)nbuf; 306 New_Field->link = New_Field; 307 308 #if USE_WIDEC_SUPPORT 309 New_Field->working = newpad(1, Buffer_Length(New_Field) + 1); 310 New_Field->expanded = typeCalloc(char *, 1 + (unsigned)nbuf); 311 #endif 312 313 if (_nc_Copy_Type(New_Field, &default_field)) 314 { 315 size_t len; 316 317 len = Total_Buffer_Size(New_Field); 318 if ((New_Field->buf = (FIELD_CELL *)malloc(len))) 319 { 320 /* Prefill buffers with blanks and insert terminating zeroes 321 between buffers */ 322 int i, j; 323 int cells = Buffer_Length(New_Field); 324 325 for (i = 0; i <= New_Field->nbuf; i++) 326 { 327 FIELD_CELL *buffer = &(New_Field->buf[(cells + 1) * i]); 328 329 for (j = 0; j < cells; ++j) 330 { 331 buffer[j] = blank; 332 } 333 buffer[j] = zeros; 334 } 335 returnField(New_Field); 336 } 337 } 338 } 339 340 if (New_Field) 341 free_field(New_Field); 342 343 SET_ERROR(err); 344 returnField((FIELD *)0); 345 } 346 347 /*--------------------------------------------------------------------------- 348 | Facility : libnform 349 | Function : int free_field( FIELD *field ) 350 | 351 | Description : Frees the storage allocated for the field. 352 | 353 | Return Values : E_OK - success 354 | E_BAD_ARGUMENT - invalid field pointer 355 | E_CONNECTED - field is connected 356 +--------------------------------------------------------------------------*/ 357 NCURSES_EXPORT(int) 358 free_field(FIELD *field) 359 { 360 T((T_CALLED("free_field(%p)"), (void *)field)); 361 if (!field) 362 { 363 RETURN(E_BAD_ARGUMENT); 364 } 365 else if (field->form != 0) 366 { 367 RETURN(E_CONNECTED); 368 } 369 else if (field == field->link) 370 { 371 if (field->buf != 0) 372 free(field->buf); 373 } 374 else 375 { 376 FIELD *f; 377 378 for (f = field; f->link != field; f = f->link) 379 { 380 } 381 f->link = field->link; 382 } 383 _nc_Free_Type(field); 384 #if USE_WIDEC_SUPPORT 385 if (field->expanded != 0) 386 { 387 int n; 388 389 for (n = 0; n <= field->nbuf; ++n) 390 { 391 FreeIfNeeded(field->expanded[n]); 392 } 393 free(field->expanded); 394 (void)delwin(field->working); 395 } 396 #endif 397 free(field); 398 RETURN(E_OK); 399 } 400 401 /* fld_def.c ends here */ 402