contrib/ncurses/form/form.h

   1 /****************************************************************************
   2  * Copyright (c) 1998-2016,2017 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  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /* $Id: form.h,v 0.27 2017/02/11 16:35:42 tom Exp $ */
  34
  35 #ifndef FORM_H
  36 #define FORM_H
  37 /* *INDENT-OFF*/
  38
  39 #include <curses.h>
  40 #include <eti.h>
  41
  42 #ifdef __cplusplus
  43   extern "C" {
  44 #endif
  45
  46 #ifndef FORM_PRIV_H
  47 typedef void *FIELD_CELL;
  48 #endif
  49
  50 #ifndef NCURSES_FIELD_INTERNALS
  51 #define NCURSES_FIELD_INTERNALS /* nothing */
  52 #endif
  53
  54 typedef int Form_Options;
  55 typedef int Field_Options;
  56
  57         /**********
  58         *  _PAGE  *
  59         **********/
  60
  61 typedef struct pagenode
  62 #if !NCURSES_OPAQUE_FORM
  63 {
  64   short pmin;           /* index of first field on page                 */
  65   short pmax;           /* index of last field on page                  */
  66   short smin;           /* index of top leftmost field on page          */
  67   short smax;           /* index of bottom rightmost field on page      */
  68 }
  69 #endif /* !NCURSES_OPAQUE_FORM */
  70 _PAGE;
  71
  72         /**********
  73         *  FIELD  *
  74         **********/
  75
  76 typedef struct fieldnode
  77 #if 1                   /* not yet: !NCURSES_OPAQUE_FORM */
  78 {
  79   unsigned short        status;         /* flags                        */
  80   short                 rows;           /* size in rows                 */
  81   short                 cols;           /* size in cols                 */
  82   short                 frow;           /* first row                    */
  83   short                 fcol;           /* first col                    */
  84   int                   drows;          /* dynamic rows                 */
  85   int                   dcols;          /* dynamic cols                 */
  86   int                   maxgrow;        /* maximum field growth         */
  87   int                   nrow;           /* off-screen rows              */
  88   short                 nbuf;           /* additional buffers           */
  89   short                 just;           /* justification                */
  90   short                 page;           /* page on form                 */
  91   short                 index;          /* into form -> field           */
  92   int                   pad;            /* pad character                */
  93   chtype                fore;           /* foreground attribute         */
  94   chtype                back;           /* background attribute         */
  95   Field_Options         opts;           /* options                      */
  96   struct fieldnode *    snext;          /* sorted order pointer         */
  97   struct fieldnode *    sprev;          /* sorted order pointer         */
  98   struct fieldnode *    link;           /* linked field chain           */
  99   struct formnode *     form;           /* containing form              */
 100   struct typenode *     type;           /* field type                   */
 101   void *                arg;            /* argument for type            */
 102   FIELD_CELL *          buf;            /* field buffers                */
 103   void *                usrptr;         /* user pointer                 */
 104   /*
 105    * The wide-character configuration requires extra information.  Because
 106    * there are existing applications that manipulate the members of FIELD
 107    * directly, we cannot make the struct opaque, except by changing the ABI.
 108    * Offsets of members up to this point are the same in the narrow- and
 109    * wide-character configuration.  But note that the type of buf depends on
 110    * the configuration, and is made opaque for that reason.
 111    */
 112   NCURSES_FIELD_INTERNALS
 113 }
 114 #endif /* NCURSES_OPAQUE_FORM */
 115 FIELD;
 116
 117
 118         /*********
 119         *  FORM  *
 120         *********/
 121
 122 typedef struct formnode
 123 #if 1                   /* not yet: !NCURSES_OPAQUE_FORM */
 124 {
 125   unsigned short        status;         /* flags                        */
 126   short                 rows;           /* size in rows                 */
 127   short                 cols;           /* size in cols                 */
 128   int                   currow;         /* current row in field window  */
 129   int                   curcol;         /* current col in field window  */
 130   int                   toprow;         /* in scrollable field window   */
 131   int                   begincol;       /* in horiz. scrollable field   */
 132   short                 maxfield;       /* number of fields             */
 133   short                 maxpage;        /* number of pages              */
 134   short                 curpage;        /* index into page              */
 135   Form_Options          opts;           /* options                      */
 136   WINDOW *              win;            /* window                       */
 137   WINDOW *              sub;            /* subwindow                    */
 138   WINDOW *              w;              /* window for current field     */
 139   FIELD **              field;          /* field [maxfield]             */
 140   FIELD *               current;        /* current field                */
 141   _PAGE *               page;           /* page [maxpage]               */
 142   void *                usrptr;         /* user pointer                 */
 143
 144   void                  (*forminit)(struct formnode *);
 145   void                  (*formterm)(struct formnode *);
 146   void                  (*fieldinit)(struct formnode *);
 147   void                  (*fieldterm)(struct formnode *);
 148
 149 }
 150 #endif /* !NCURSES_OPAQUE_FORM */
 151 FORM;
 152
 153
 154         /**************
 155         *  FIELDTYPE  *
 156         **************/
 157
 158 typedef struct typenode
 159 #if !NCURSES_OPAQUE_FORM
 160 {
 161   unsigned short        status;                 /* flags                    */
 162   long                  ref;                    /* reference count          */
 163   struct typenode *     left;                   /* ptr to operand for |     */
 164   struct typenode *     right;                  /* ptr to operand for |     */
 165
 166   void* (*makearg)(va_list *);                  /* make fieldtype arg       */
 167   void* (*copyarg)(const void *);               /* copy fieldtype arg       */
 168   void  (*freearg)(void *);                     /* free fieldtype arg       */
 169
 170 #if NCURSES_INTEROP_FUNCS
 171   union {
 172     bool (*ofcheck)(FIELD *,const void *);      /* field validation         */
 173     bool (*gfcheck)(FORM*,FIELD *,const void*); /* generic field validation */
 174   } fieldcheck;
 175   union {
 176     bool (*occheck)(int,const void *);          /* character validation     */
 177     bool (*gccheck)(int,FORM*,
 178                     FIELD*,const void*);        /* generic char validation  */
 179   } charcheck;
 180   union {
 181     bool (*onext)(FIELD *,const void *);        /* enumerate next value     */
 182     bool (*gnext)(FORM*,FIELD*,const void*);    /* generic enumerate next   */
 183   } enum_next;
 184   union {
 185     bool (*oprev)(FIELD *,const void *);        /* enumerate prev value     */
 186     bool (*gprev)(FORM*,FIELD*,const void*);    /* generic enumerate prev   */
 187   } enum_prev;
 188   void* (*genericarg)(void*);                   /* Alternate Arg method     */
 189 #else
 190   bool  (*fcheck)(FIELD *,const void *);        /* field validation     */
 191   bool  (*ccheck)(int,const void *);            /* character validation */
 192
 193   bool  (*next)(FIELD *,const void *);          /* enumerate next value */
 194   bool  (*prev)(FIELD *,const void *);          /* enumerate prev value */
 195 #endif
 196 }
 197 #endif /* !NCURSES_OPAQUE_FORM */
 198 FIELDTYPE;
 199
 200 typedef void (*Form_Hook)(FORM *);
 201
 202         /***************************
 203         *  miscellaneous #defines  *
 204         ***************************/
 205
 206 /* field justification */
 207 #define NO_JUSTIFICATION        (0)
 208 #define JUSTIFY_LEFT            (1)
 209 #define JUSTIFY_CENTER          (2)
 210 #define JUSTIFY_RIGHT           (3)
 211
 212 /* field options */
 213 #define O_VISIBLE               (0x0001U)
 214 #define O_ACTIVE                (0x0002U)
 215 #define O_PUBLIC                (0x0004U)
 216 #define O_EDIT                  (0x0008U)
 217 #define O_WRAP                  (0x0010U)
 218 #define O_BLANK                 (0x0020U)
 219 #define O_AUTOSKIP              (0x0040U)
 220 #define O_NULLOK                (0x0080U)
 221 #define O_PASSOK                (0x0100U)
 222 #define O_STATIC                (0x0200U)
 223 #define O_DYNAMIC_JUSTIFY       (0x0400U)       /* ncurses extension    */
 224 #define O_NO_LEFT_STRIP         (0x0800U)       /* ncurses extension    */
 225
 226 /* form options */
 227 #define O_NL_OVERLOAD           (0x0001U)
 228 #define O_BS_OVERLOAD           (0x0002U)
 229
 230 /* form driver commands */
 231 #define REQ_NEXT_PAGE    (KEY_MAX + 1)  /* move to next page            */
 232 #define REQ_PREV_PAGE    (KEY_MAX + 2)  /* move to previous page        */
 233 #define REQ_FIRST_PAGE   (KEY_MAX + 3)  /* move to first page           */
 234 #define REQ_LAST_PAGE    (KEY_MAX + 4)  /* move to last page            */
 235
 236 #define REQ_NEXT_FIELD   (KEY_MAX + 5)  /* move to next field           */
 237 #define REQ_PREV_FIELD   (KEY_MAX + 6)  /* move to previous field       */
 238 #define REQ_FIRST_FIELD  (KEY_MAX + 7)  /* move to first field          */
 239 #define REQ_LAST_FIELD   (KEY_MAX + 8)  /* move to last field           */
 240 #define REQ_SNEXT_FIELD  (KEY_MAX + 9)  /* move to sorted next field    */
 241 #define REQ_SPREV_FIELD  (KEY_MAX + 10) /* move to sorted prev field    */
 242 #define REQ_SFIRST_FIELD (KEY_MAX + 11) /* move to sorted first field   */
 243 #define REQ_SLAST_FIELD  (KEY_MAX + 12) /* move to sorted last field    */
 244 #define REQ_LEFT_FIELD   (KEY_MAX + 13) /* move to left to field        */
 245 #define REQ_RIGHT_FIELD  (KEY_MAX + 14) /* move to right to field       */
 246 #define REQ_UP_FIELD     (KEY_MAX + 15) /* move to up to field          */
 247 #define REQ_DOWN_FIELD   (KEY_MAX + 16) /* move to down to field        */
 248
 249 #define REQ_NEXT_CHAR    (KEY_MAX + 17) /* move to next char in field   */
 250 #define REQ_PREV_CHAR    (KEY_MAX + 18) /* move to prev char in field   */
 251 #define REQ_NEXT_LINE    (KEY_MAX + 19) /* move to next line in field   */
 252 #define REQ_PREV_LINE    (KEY_MAX + 20) /* move to prev line in field   */
 253 #define REQ_NEXT_WORD    (KEY_MAX + 21) /* move to next word in field   */
 254 #define REQ_PREV_WORD    (KEY_MAX + 22) /* move to prev word in field   */
 255 #define REQ_BEG_FIELD    (KEY_MAX + 23) /* move to first char in field  */
 256 #define REQ_END_FIELD    (KEY_MAX + 24) /* move after last char in fld  */
 257 #define REQ_BEG_LINE     (KEY_MAX + 25) /* move to beginning of line    */
 258 #define REQ_END_LINE     (KEY_MAX + 26) /* move after last char in line */
 259 #define REQ_LEFT_CHAR    (KEY_MAX + 27) /* move left in field           */
 260 #define REQ_RIGHT_CHAR   (KEY_MAX + 28) /* move right in field          */
 261 #define REQ_UP_CHAR      (KEY_MAX + 29) /* move up in field             */
 262 #define REQ_DOWN_CHAR    (KEY_MAX + 30) /* move down in field           */
 263
 264 #define REQ_NEW_LINE     (KEY_MAX + 31) /* insert/overlay new line      */
 265 #define REQ_INS_CHAR     (KEY_MAX + 32) /* insert blank char at cursor  */
 266 #define REQ_INS_LINE     (KEY_MAX + 33) /* insert blank line at cursor  */
 267 #define REQ_DEL_CHAR     (KEY_MAX + 34) /* delete char at cursor        */
 268 #define REQ_DEL_PREV     (KEY_MAX + 35) /* delete char before cursor    */
 269 #define REQ_DEL_LINE     (KEY_MAX + 36) /* delete line at cursor        */
 270 #define REQ_DEL_WORD     (KEY_MAX + 37) /* delete word at cursor        */
 271 #define REQ_CLR_EOL      (KEY_MAX + 38) /* clear to end of line         */
 272 #define REQ_CLR_EOF      (KEY_MAX + 39) /* clear to end of field        */
 273 #define REQ_CLR_FIELD    (KEY_MAX + 40) /* clear entire field           */
 274 #define REQ_OVL_MODE     (KEY_MAX + 41) /* begin overlay mode           */
 275 #define REQ_INS_MODE     (KEY_MAX + 42) /* begin insert mode            */
 276 #define REQ_SCR_FLINE    (KEY_MAX + 43) /* scroll field forward a line  */
 277 #define REQ_SCR_BLINE    (KEY_MAX + 44) /* scroll field backward a line */
 278 #define REQ_SCR_FPAGE    (KEY_MAX + 45) /* scroll field forward a page  */
 279 #define REQ_SCR_BPAGE    (KEY_MAX + 46) /* scroll field backward a page */
 280 #define REQ_SCR_FHPAGE   (KEY_MAX + 47) /* scroll field forward  half page */
 281 #define REQ_SCR_BHPAGE   (KEY_MAX + 48) /* scroll field backward half page */
 282 #define REQ_SCR_FCHAR    (KEY_MAX + 49) /* horizontal scroll char       */
 283 #define REQ_SCR_BCHAR    (KEY_MAX + 50) /* horizontal scroll char       */
 284 #define REQ_SCR_HFLINE   (KEY_MAX + 51) /* horizontal scroll line       */
 285 #define REQ_SCR_HBLINE   (KEY_MAX + 52) /* horizontal scroll line       */
 286 #define REQ_SCR_HFHALF   (KEY_MAX + 53) /* horizontal scroll half line  */
 287 #define REQ_SCR_HBHALF   (KEY_MAX + 54) /* horizontal scroll half line  */
 288
 289 #define REQ_VALIDATION   (KEY_MAX + 55) /* validate field               */
 290 #define REQ_NEXT_CHOICE  (KEY_MAX + 56) /* display next field choice    */
 291 #define REQ_PREV_CHOICE  (KEY_MAX + 57) /* display prev field choice    */
 292
 293 #define MIN_FORM_COMMAND (KEY_MAX + 1)  /* used by form_driver          */
 294 #define MAX_FORM_COMMAND (KEY_MAX + 57) /* used by form_driver          */
 295
 296 #if defined(MAX_COMMAND)
 297 #  if (MAX_FORM_COMMAND > MAX_COMMAND)
 298 #    error Something is wrong -- MAX_FORM_COMMAND is greater than MAX_COMMAND
 299 #  elif (MAX_COMMAND != (KEY_MAX + 128))
 300 #    error Something is wrong -- MAX_COMMAND is already inconsistently defined.
 301 #  endif
 302 #else
 303 #  define MAX_COMMAND (KEY_MAX + 128)
 304 #endif
 305
 306         /*************************
 307         *  standard field types  *
 308         *************************/
 309 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_ALPHA;
 310 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_ALNUM;
 311 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_ENUM;
 312 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_INTEGER;
 313 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_NUMERIC;
 314 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_REGEXP;
 315
 316         /************************************
 317         *  built-in additional field types  *
 318         *  They are not defined in SVr4     *
 319         ************************************/
 320 extern NCURSES_EXPORT_VAR(FIELDTYPE *) TYPE_IPV4;      /* Internet IP Version 4 address */
 321
 322         /***********************
 323         *  FIELDTYPE routines  *
 324         ***********************/
 325 extern NCURSES_EXPORT(FIELDTYPE *) new_fieldtype (
 326                     bool (* const field_check)(FIELD *,const void *),
 327                     bool (* const char_check)(int,const void *));
 328 extern NCURSES_EXPORT(FIELDTYPE *) link_fieldtype(
 329                     FIELDTYPE *, FIELDTYPE *);
 330
 331 extern NCURSES_EXPORT(int)      free_fieldtype (FIELDTYPE *);
 332 extern NCURSES_EXPORT(int)      set_fieldtype_arg (FIELDTYPE *,
 333                     void * (* const make_arg)(va_list *),
 334                     void * (* const copy_arg)(const void *),
 335                     void (* const free_arg)(void *));
 336 extern NCURSES_EXPORT(int)       set_fieldtype_choice (FIELDTYPE *,
 337                     bool (* const next_choice)(FIELD *,const void *),
 338                     bool (* const prev_choice)(FIELD *,const void *));
 339
 340         /*******************
 341         *  FIELD routines  *
 342         *******************/
 343 extern NCURSES_EXPORT(FIELD *)  new_field (int,int,int,int,int,int);
 344 extern NCURSES_EXPORT(FIELD *)  dup_field (FIELD *,int,int);
 345 extern NCURSES_EXPORT(FIELD *)  link_field (FIELD *,int,int);
 346
 347 extern NCURSES_EXPORT(int)      free_field (FIELD *);
 348 extern NCURSES_EXPORT(int)      field_info (const FIELD *,int *,int *,int *,int *,int *,int *);
 349 extern NCURSES_EXPORT(int)      dynamic_field_info (const FIELD *,int *,int *,int *);
 350 extern NCURSES_EXPORT(int)      set_max_field ( FIELD *,int);
 351 extern NCURSES_EXPORT(int)      move_field (FIELD *,int,int);
 352 extern NCURSES_EXPORT(int)      set_field_type (FIELD *,FIELDTYPE *,...);
 353 extern NCURSES_EXPORT(int)      set_new_page (FIELD *,bool);
 354 extern NCURSES_EXPORT(int)      set_field_just (FIELD *,int);
 355 extern NCURSES_EXPORT(int)      field_just (const FIELD *);
 356 extern NCURSES_EXPORT(int)      set_field_fore (FIELD *,chtype);
 357 extern NCURSES_EXPORT(int)      set_field_back (FIELD *,chtype);
 358 extern NCURSES_EXPORT(int)      set_field_pad (FIELD *,int);
 359 extern NCURSES_EXPORT(int)      field_pad (const FIELD *);
 360 extern NCURSES_EXPORT(int)      set_field_buffer (FIELD *,int,const char *);
 361 extern NCURSES_EXPORT(int)      set_field_status (FIELD *,bool);
 362 extern NCURSES_EXPORT(int)      set_field_userptr (FIELD *, void *);
 363 extern NCURSES_EXPORT(int)      set_field_opts (FIELD *,Field_Options);
 364 extern NCURSES_EXPORT(int)      field_opts_on (FIELD *,Field_Options);
 365 extern NCURSES_EXPORT(int)      field_opts_off (FIELD *,Field_Options);
 366
 367 extern NCURSES_EXPORT(chtype)   field_fore (const FIELD *);
 368 extern NCURSES_EXPORT(chtype)   field_back (const FIELD *);
 369
 370 extern NCURSES_EXPORT(bool)     new_page (const FIELD *);
 371 extern NCURSES_EXPORT(bool)     field_status (const FIELD *);
 372
 373 extern NCURSES_EXPORT(void *)   field_arg (const FIELD *);
 374
 375 extern NCURSES_EXPORT(void *)   field_userptr (const FIELD *);
 376
 377 extern NCURSES_EXPORT(FIELDTYPE *)      field_type (const FIELD *);
 378
 379 extern NCURSES_EXPORT(char *)   field_buffer (const FIELD *,int);
 380
 381 extern NCURSES_EXPORT(Field_Options)    field_opts (const FIELD *);
 382
 383         /******************
 384         *  FORM routines  *
 385         ******************/
 386
 387 extern NCURSES_EXPORT(FORM *)   new_form (FIELD **);
 388
 389 extern NCURSES_EXPORT(FIELD **) form_fields (const FORM *);
 390 extern NCURSES_EXPORT(FIELD *)  current_field (const FORM *);
 391
 392 extern NCURSES_EXPORT(WINDOW *) form_win (const FORM *);
 393 extern NCURSES_EXPORT(WINDOW *) form_sub (const FORM *);
 394
 395 extern NCURSES_EXPORT(Form_Hook)        form_init (const FORM *);
 396 extern NCURSES_EXPORT(Form_Hook)        form_term (const FORM *);
 397 extern NCURSES_EXPORT(Form_Hook)        field_init (const FORM *);
 398 extern NCURSES_EXPORT(Form_Hook)        field_term (const FORM *);
 399
 400 extern NCURSES_EXPORT(int)      free_form (FORM *);
 401 extern NCURSES_EXPORT(int)      set_form_fields (FORM *,FIELD **);
 402 extern NCURSES_EXPORT(int)      field_count (const FORM *);
 403 extern NCURSES_EXPORT(int)      set_form_win (FORM *,WINDOW *);
 404 extern NCURSES_EXPORT(int)      set_form_sub (FORM *,WINDOW *);
 405 extern NCURSES_EXPORT(int)      set_current_field (FORM *,FIELD *);
 406 extern NCURSES_EXPORT(int)      unfocus_current_field (FORM *);
 407 extern NCURSES_EXPORT(int)      field_index (const FIELD *);
 408 extern NCURSES_EXPORT(int)      set_form_page (FORM *,int);
 409 extern NCURSES_EXPORT(int)      form_page (const FORM *);
 410 extern NCURSES_EXPORT(int)      scale_form (const FORM *,int *,int *);
 411 extern NCURSES_EXPORT(int)      set_form_init (FORM *,Form_Hook);
 412 extern NCURSES_EXPORT(int)      set_form_term (FORM *,Form_Hook);
 413 extern NCURSES_EXPORT(int)      set_field_init (FORM *,Form_Hook);
 414 extern NCURSES_EXPORT(int)      set_field_term (FORM *,Form_Hook);
 415 extern NCURSES_EXPORT(int)      post_form (FORM *);
 416 extern NCURSES_EXPORT(int)      unpost_form (FORM *);
 417 extern NCURSES_EXPORT(int)      pos_form_cursor (FORM *);
 418 extern NCURSES_EXPORT(int)      form_driver (FORM *,int);
 419 # if NCURSES_WIDECHAR
 420 extern NCURSES_EXPORT(int)      form_driver_w (FORM *,int,wchar_t);
 421 # endif
 422 extern NCURSES_EXPORT(int)      set_form_userptr (FORM *,void *);
 423 extern NCURSES_EXPORT(int)      set_form_opts (FORM *,Form_Options);
 424 extern NCURSES_EXPORT(int)      form_opts_on (FORM *,Form_Options);
 425 extern NCURSES_EXPORT(int)      form_opts_off (FORM *,Form_Options);
 426 extern NCURSES_EXPORT(int)      form_request_by_name (const char *);
 427
 428 extern NCURSES_EXPORT(const char *)     form_request_name (int);
 429
 430 extern NCURSES_EXPORT(void *)   form_userptr (const FORM *);
 431
 432 extern NCURSES_EXPORT(Form_Options)     form_opts (const FORM *);
 433
 434 extern NCURSES_EXPORT(bool)     data_ahead (const FORM *);
 435 extern NCURSES_EXPORT(bool)     data_behind (const FORM *);
 436
 437 #if NCURSES_SP_FUNCS
 438 extern NCURSES_EXPORT(FORM *)   NCURSES_SP_NAME(new_form) (SCREEN*, FIELD **);
 439 #endif
 440
 441 #ifdef __cplusplus
 442   }
 443 #endif
 444 /* *INDENT-ON*/
 445
 446 #endif /* FORM_H */