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/*
* base code for various Tcl extensions
* Copyright 2006-2012 Ian Jackson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "chiark-tcl-base.h"
int cht_pat_charfrom(Tcl_Interp *ip, Tcl_Obj *obj, int *val,
const char *opts, const char *what) {
*val= cht_enum1_lookup_cached_func(ip,obj,opts,what);
if (*val==-1) return TCL_ERROR;
return TCL_OK;
}
int cht_pat_int(Tcl_Interp *ip, Tcl_Obj *obj, int *val) {
return Tcl_GetIntFromObj(ip, obj, val);
}
int cht_pat_long(Tcl_Interp *ip, Tcl_Obj *obj, long *val) {
return Tcl_GetLongFromObj(ip, obj, val);
}
int cht_pat_string(Tcl_Interp *ip, Tcl_Obj *obj, const char **val) {
*val= Tcl_GetString(obj);
return TCL_OK;
}
int cht_pat_constv(Tcl_Interp *ip, Tcl_Obj *var,
Tcl_Obj **val_r, Tcl_ObjType *type) {
int rc;
Tcl_Obj *val;
val= Tcl_ObjGetVar2(ip,var,0,TCL_LEAVE_ERR_MSG);
if (!val) return TCL_ERROR;
if (type) {
rc= Tcl_ConvertToType(ip,val,type);
if (rc) return rc;
}
*val_r= val;
return TCL_OK;
}
void cht_init_somethingv(Something_Var *sth) {
sth->obj=0; sth->var=0; sth->copied=0;
}
int cht_pat_somethingv(Tcl_Interp *ip, Tcl_Obj *var,
Something_Var *sth, Tcl_ObjType *type) {
int rc;
Tcl_Obj *val;
sth->var= var;
val= Tcl_ObjGetVar2(ip,var,0,TCL_LEAVE_ERR_MSG);
if (!val) return TCL_ERROR;
rc= Tcl_ConvertToType(ip,val,type);
if (rc) return rc;
if (Tcl_IsShared(val)) {
val= Tcl_DuplicateObj(val);
sth->copied= 1;
}
Tcl_InvalidateStringRep(val);
sth->obj= val;
return TCL_OK;
}
void cht_fini_somethingv(Tcl_Interp *ip, int rc, Something_Var *sth) {
Tcl_Obj *ro;
if (!rc) {
assert(sth->obj);
ro= Tcl_ObjSetVar2(ip,sth->var,0,sth->obj,TCL_LEAVE_ERR_MSG);
if (!ro) rc= TCL_ERROR;
}
if (rc && sth->copied)
Tcl_DecrRefCount(sth->obj);
}
Tcl_Obj *cht_ret_long(Tcl_Interp *ip, long val) {
return Tcl_NewLongObj(val);
}
Tcl_Obj *cht_ret_string(Tcl_Interp *ip, const char *val) {
return Tcl_NewStringObj(val,-1);
}
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