- sc= enum_lookup_cached(ip,objv[1],subcommands,"hbytes subcommand");
+/*
+ * base code for various Tcl extensions
+ * Copyright 2006 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include "chiark-tcl-base.h"
-static Tcl_Obj *hb_getvar(Tcl_Interp *ip, Tcl_Obj *varname) {
- int ec;
- Tcl_Obj *value;
+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;
- value= Tcl_ObjGetVar2(ip,varname,0,TCL_LEAVE_ERR_MSG);
- if (!value) return 0;
+ 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;
+ }
- ec= Tcl_ConvertToType(ip,value,&hbytes_type);
- if (ec) return 0;
+ *val_r= val;
+ return TCL_OK;
+}
- return value;
+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);
+}