/**************************************************************************** * Copyright (c) 1998-2005,2007 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /**************************************************************************** * Author: Juergen Pfeifer, 1995,1997 * ****************************************************************************/ #include "form.priv.h" MODULE_ID("$Id: fld_def.c,v 1.36 2007/10/13 19:29:58 tom Exp $") /* this can't be readonly */ static FIELD default_field = { 0, /* status */ 0, /* rows */ 0, /* cols */ 0, /* frow */ 0, /* fcol */ 0, /* drows */ 0, /* dcols */ 0, /* maxgrow */ 0, /* nrow */ 0, /* nbuf */ NO_JUSTIFICATION, /* just */ 0, /* page */ 0, /* index */ (int)' ', /* pad */ A_NORMAL, /* fore */ A_NORMAL, /* back */ ALL_FIELD_OPTS, /* opts */ (FIELD *)0, /* snext */ (FIELD *)0, /* sprev */ (FIELD *)0, /* link */ (FORM *)0, /* form */ (FIELDTYPE *)0, /* type */ (char *)0, /* arg */ (FIELD_CELL *)0, /* buf */ (char *)0 /* usrptr */ NCURSES_FIELD_EXTENSION }; NCURSES_EXPORT_VAR(FIELD *) _nc_Default_Field = &default_field; /*--------------------------------------------------------------------------- | Facility : libnform | Function : TypeArgument *_nc_Make_Argument( | const FIELDTYPE *typ, | va_list *ap, | int *err ) | | Description : Create an argument structure for the specified type. | Use the type-dependent argument list to construct | it. | | Return Values : Pointer to argument structure. Maybe NULL. | In case of an error in *err an error counter is increased. +--------------------------------------------------------------------------*/ NCURSES_EXPORT(TypeArgument *) _nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err) { TypeArgument *res = (TypeArgument *)0; TypeArgument *p; if (typ != 0 && (typ->status & _HAS_ARGS) != 0) { assert(err != 0 && ap != (va_list *)0); if ((typ->status & _LINKED_TYPE) != 0) { p = typeMalloc(TypeArgument, 1); if (p != 0) { p->left = _nc_Make_Argument(typ->left, ap, err); p->right = _nc_Make_Argument(typ->right, ap, err); return p; } else { *err += 1; } } else { assert(typ->makearg != (void *)0); if (!(res = (TypeArgument *)typ->makearg(ap))) { *err += 1; } } } return res; } /*--------------------------------------------------------------------------- | Facility : libnform | Function : TypeArgument *_nc_Copy_Argument(const FIELDTYPE *typ, | const TypeArgument *argp, | int *err ) | | Description : Create a copy of an argument structure for the specified | type. | | Return Values : Pointer to argument structure. Maybe NULL. | In case of an error in *err an error counter is increased. +--------------------------------------------------------------------------*/ NCURSES_EXPORT(TypeArgument *) _nc_Copy_Argument(const FIELDTYPE *typ, const TypeArgument *argp, int *err) { TypeArgument *res = (TypeArgument *)0; TypeArgument *p; if (typ != 0 && (typ->status & _HAS_ARGS) != 0) { assert(err != 0 && argp != 0); if ((typ->status & _LINKED_TYPE) != 0) { p = typeMalloc(TypeArgument, 1); if (p != 0) { p->left = _nc_Copy_Argument(typ, argp->left, err); p->right = _nc_Copy_Argument(typ, argp->right, err); return p; } *err += 1; } else { if (typ->copyarg != (void *)0) { if (!(res = (TypeArgument *)(typ->copyarg((const void *)argp)))) { *err += 1; } } else { res = (TypeArgument *)argp; } } } return res; } /*--------------------------------------------------------------------------- | Facility : libnform | Function : void _nc_Free_Argument(const FIELDTYPE *typ, | TypeArgument * argp ) | | Description : Release memory associated with the argument structure | for the given fieldtype. | | Return Values : - +--------------------------------------------------------------------------*/ NCURSES_EXPORT(void) _nc_Free_Argument(const FIELDTYPE *typ, TypeArgument *argp) { if (typ != 0 && (typ->status & _HAS_ARGS) != 0) { if ((typ->status & _LINKED_TYPE) != 0) { assert(argp != 0); _nc_Free_Argument(typ->left, argp->left); _nc_Free_Argument(typ->right, argp->right); free(argp); } else { if (typ->freearg != (void *)0) { typ->freearg((void *)argp); } } } } /*--------------------------------------------------------------------------- | Facility : libnform | Function : bool _nc_Copy_Type( FIELD *dst, FIELD const *src ) | | Description : Copy argument structure of field src to field dst | | Return Values : TRUE - copy worked | FALSE - error occurred +--------------------------------------------------------------------------*/ NCURSES_EXPORT(bool) _nc_Copy_Type(FIELD *dst, FIELD const *src) { int err = 0; assert(dst != 0 && src != 0); dst->type = src->type; dst->arg = (void *)_nc_Copy_Argument(src->type, (TypeArgument *)(src->arg), &err); if (err != 0) { _nc_Free_Argument(dst->type, (TypeArgument *)(dst->arg)); dst->type = (FIELDTYPE *)0; dst->arg = (void *)0; return FALSE; } else { if (dst->type != 0) { dst->type->ref++; } return TRUE; } } /*--------------------------------------------------------------------------- | Facility : libnform | Function : void _nc_Free_Type( FIELD *field ) | | Description : Release Argument structure for this field | | Return Values : - +--------------------------------------------------------------------------*/ NCURSES_EXPORT(void) _nc_Free_Type(FIELD *field) { assert(field != 0); if (field->type != 0) { field->type->ref--; } _nc_Free_Argument(field->type, (TypeArgument *)(field->arg)); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : FIELD *new_field( int rows, int cols, | int frow, int fcol, | int nrow, int nbuf ) | | Description : Create a new field with this many 'rows' and 'cols', | starting at 'frow/fcol' in the subwindow of the form. | Allocate 'nrow' off-screen rows and 'nbuf' additional | buffers. If an error occurs, errno is set to | | E_BAD_ARGUMENT - invalid argument | E_SYSTEM_ERROR - system error | | Return Values : Pointer to the new field or NULL if failure. +--------------------------------------------------------------------------*/ NCURSES_EXPORT(FIELD *) new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf) { static const FIELD_CELL blank = BLANK; static const FIELD_CELL zeros = ZEROS; FIELD *New_Field = (FIELD *)0; int err = E_BAD_ARGUMENT; T((T_CALLED("new_field(%d,%d,%d,%d,%d,%d)"), rows, cols, frow, fcol, nrow, nbuf)); if (rows > 0 && cols > 0 && frow >= 0 && fcol >= 0 && nrow >= 0 && nbuf >= 0 && ((err = E_SYSTEM_ERROR) != 0) && /* trick: this resets the default error */ (New_Field = typeMalloc(FIELD, 1)) != 0) { T((T_CREATE("field %p"), New_Field)); *New_Field = default_field; New_Field->rows = rows; New_Field->cols = cols; New_Field->drows = rows + nrow; New_Field->dcols = cols; New_Field->frow = frow; New_Field->fcol = fcol; New_Field->nrow = nrow; New_Field->nbuf = nbuf; New_Field->link = New_Field; #if USE_WIDEC_SUPPORT New_Field->working = newpad(1, Buffer_Length(New_Field) + 1); New_Field->expanded = typeCalloc(char *, 1 + (unsigned)nbuf); #endif if (_nc_Copy_Type(New_Field, &default_field)) { size_t len; len = Total_Buffer_Size(New_Field); if ((New_Field->buf = (FIELD_CELL *)malloc(len))) { /* Prefill buffers with blanks and insert terminating zeroes between buffers */ int i, j; int cells = Buffer_Length(New_Field); for (i = 0; i <= New_Field->nbuf; i++) { FIELD_CELL *buffer = &(New_Field->buf[(cells + 1) * i]); for (j = 0; j < cells; ++j) { buffer[j] = blank; } buffer[j] = zeros; } returnField(New_Field); } } } if (New_Field) free_field(New_Field); SET_ERROR(err); returnField((FIELD *)0); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : int free_field( FIELD *field ) | | Description : Frees the storage allocated for the field. | | Return Values : E_OK - success | E_BAD_ARGUMENT - invalid field pointer | E_CONNECTED - field is connected +--------------------------------------------------------------------------*/ NCURSES_EXPORT(int) free_field(FIELD *field) { T((T_CALLED("free_field(%p)"), field)); if (!field) { RETURN(E_BAD_ARGUMENT); } else if (field->form != 0) { RETURN(E_CONNECTED); } else if (field == field->link) { if (field->buf != 0) free(field->buf); } else { FIELD *f; for (f = field; f->link != field; f = f->link) { } f->link = field->link; } _nc_Free_Type(field); #if USE_WIDEC_SUPPORT if (field->expanded != 0) { int n; for (n = 0; n <= field->nbuf; ++n) { FreeIfNeeded(field->expanded[n]); } free(field->expanded); (void)delwin(field->working); } #endif free(field); RETURN(E_OK); } /* fld_def.c ends here */