diff options
Diffstat (limited to 'Source/CursesDialog/form/fld_def.c')
| -rw-r--r-- | Source/CursesDialog/form/fld_def.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/Source/CursesDialog/form/fld_def.c b/Source/CursesDialog/form/fld_def.c new file mode 100644 index 0000000..00da3b4 --- /dev/null +++ b/Source/CursesDialog/form/fld_def.c @@ -0,0 +1,346 @@ +/**************************************************************************** + * Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 1995,1997 * + ****************************************************************************/ + +#include "form.priv.h" + +MODULE_ID("$Id$") + +/* 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 */ + (char *)0, /* buf */ + (char *)0 /* usrptr */ +}; + +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 errorcounter is increased. ++--------------------------------------------------------------------------*/ +TypeArgument* +_nc_Make_Argument(const FIELDTYPE *typ, va_list *ap, int *err) +{ + TypeArgument *res = (TypeArgument *)0; + TypeArgument *p; + + if (typ && (typ->status & _HAS_ARGS)) + { + assert(err && ap); + if (typ->status & _LINKED_TYPE) + { + p = (TypeArgument *)malloc(sizeof(TypeArgument)); + if (p) + { + 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 != 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 errorcounter is increased. ++--------------------------------------------------------------------------*/ +TypeArgument* +_nc_Copy_Argument(const FIELDTYPE *typ, + const TypeArgument *argp, int *err) +{ + TypeArgument *res = (TypeArgument *)0; + TypeArgument *p; + + if ( typ && (typ->status & _HAS_ARGS) ) + { + assert(err && argp); + if (typ->status & _LINKED_TYPE) + { + p = (TypeArgument *)malloc(sizeof(TypeArgument)); + if (p) + { + 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) + { + 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 : - ++--------------------------------------------------------------------------*/ +void +_nc_Free_Argument(const FIELDTYPE * typ, TypeArgument * argp) +{ + if (!typ || !(typ->status & _HAS_ARGS)) + return; + + if (typ->status & _LINKED_TYPE) + { + assert(argp != 0); + _nc_Free_Argument(typ->left ,argp->left ); + _nc_Free_Argument(typ->right,argp->right); + free(argp); + } + else + { + if (typ->freearg) + 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 ++--------------------------------------------------------------------------*/ +bool +_nc_Copy_Type(FIELD *dst, FIELD const *src) +{ + int err = 0; + + assert(dst && src); + + dst->type = src->type; + dst->arg = (void *)_nc_Copy_Argument(src->type,(TypeArgument *)(src->arg),&err); + + if (err) + { + _nc_Free_Argument(dst->type,(TypeArgument *)(dst->arg)); + dst->type = (FIELDTYPE *)0; + dst->arg = (void *)0; + return FALSE; + } + else + { + if (dst->type) + dst->type->ref++; + return TRUE; + } +} + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : void _nc_Free_Type( FIELD *field ) +| +| Description : Release Argument structure for this field +| +| Return Values : - ++--------------------------------------------------------------------------*/ +void +_nc_Free_Type(FIELD *field) +{ + assert(field != 0); + if (field->type) + 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. ++--------------------------------------------------------------------------*/ +FIELD *new_field(int rows, int cols, int frow, int fcol, int nrow, int nbuf) +{ + FIELD *New_Field = (FIELD *)0; + int err = E_BAD_ARGUMENT; + + 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=(FIELD *)malloc(sizeof(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 (_nc_Copy_Type(New_Field,&default_field)) + { + size_t len; + + len = Total_Buffer_Size(New_Field); + if ((New_Field->buf = (char *)malloc(len))) + { + /* Prefill buffers with blanks and insert terminating zeroes + between buffers */ + int i; + + memset(New_Field->buf,' ',len); + for(i=0;i<=New_Field->nbuf;i++) + { + New_Field->buf[(New_Field->drows*New_Field->cols+1)*(i+1)-1] + = '\0'; + } + return New_Field; + } + } + } + + if (New_Field) + free_field(New_Field); + + SET_ERROR( err ); + return (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 ++--------------------------------------------------------------------------*/ +int free_field(FIELD * field) +{ + if (!field) + RETURN(E_BAD_ARGUMENT); + + if (field->form) + RETURN(E_CONNECTED); + + if (field == field->link) + { + if (field->buf) + free(field->buf); + } + else + { + FIELD *f; + + for(f=field;f->link != field;f = f->link) + {} + f->link = field->link; + } + _nc_Free_Type(field); + free(field); + RETURN(E_OK); +} + +/* fld_def.c ends here */ |