2 * base code for various Tcl extensions
3 * Copyright 2006-2012 Ian Jackson
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this library; if not, see <http://www.gnu.org/licenses/>.
19 #include "chiark-tcl-base.h"
24 const IdDataSpec *idds;
31 IdDataAssocData *assoc;
35 static void assoc_del(ClientData assoc_cd, Tcl_Interp *ip) {
36 IdDataAssocData *assoc;
41 for (ix=0, p=assoc->a; ix<assoc->n; ix++, p++) {
44 assert(*(int*)v == ix);
46 assoc->idds->destroyitem(ip,v);
53 static void setobjdataid(Tcl_Interp *interp, Tcl_Obj *o,
54 int ix, const IdDataSpec *idds) {
56 IdDataAssocData *assoc;
58 assoc= Tcl_GetAssocData(interp, (char*)idds->assockey, 0);
60 assoc= TALLOC(sizeof(*assoc));
64 Tcl_SetAssocData(interp, (char*)idds->assockey, assoc_del, assoc);
67 dv= TALLOC(sizeof(*dv));
72 o->typePtr= &cht_tabledataid_nearlytype;
73 o->internalRep.otherValuePtr= dv;
76 int cht_tabledataid_parse(Tcl_Interp *ip, Tcl_Obj *o, const IdDataSpec *idds) {
82 if (o->typePtr != &cht_tabledataid_nearlytype) goto convert;
84 dv= o->internalRep.otherValuePtr;
85 if (dv->interp != ip) goto convert;
86 if (dv->assoc->idds != idds) goto convert;
91 l= strlen(idds->valprefix);
92 str= Tcl_GetStringFromObj(o,0);
93 if (memcmp(str,idds->valprefix,l))
94 return cht_staticerr(ip,"bad id (wrong prefix)",0);
96 errno=0; ul=strtoul(str+l,&ep,10);
97 if (errno || *ep) return cht_staticerr(ip,"bad id number",0);
98 if (ul > INT_MAX) return cht_staticerr(ip,"out of range id number",0);
101 setobjdataid(ip,o,ul,idds);
105 int cht_pat_iddata(Tcl_Interp *ip, Tcl_Obj *o, void **rv, const IdDataSpec *idds) {
108 IdDataAssocData *assoc;
111 rc= cht_tabledataid_parse(ip,o,idds);
114 dv= o->internalRep.otherValuePtr;
118 if (ix >= assoc->n || !(r= assoc->a[ix]))
119 return cht_staticerr(ip,"id not in use",0);
121 assert(*(int*)r == ix);
127 Tcl_Obj *cht_ret_iddata(Tcl_Interp *ip, void *val, const IdDataSpec *idds) {
128 /* Command procedure implementation may set val->ix,
129 * ie *(int*)val, to -1, to mean it's a new struct. Otherwise
130 * it had better be an old one !
134 IdDataAssocData *assoc;
138 setobjdataid(ip,o,0,idds);
139 dv= o->internalRep.otherValuePtr;
144 for (ix=0; ix<assoc->n && assoc->a[ix]; ix++);
146 assert(assoc->n < INT_MAX/4);
149 assoc->a= TREALLOC(assoc->a, assoc->n*sizeof(*assoc->a));
150 while (ix<assoc->n) assoc->a[ix++]=0;
156 assert(val == assoc->a[ix]);
159 Tcl_InvalidateStringRep(o);
163 void cht_tabledataid_disposing(Tcl_Interp *ip, void *val, const IdDataSpec *idds) {
164 IdDataAssocData *assoc;
170 assoc= Tcl_GetAssocData(ip, (char*)idds->assockey, 0);
171 assert(assoc->a[ix] == val);
176 static int tabledataid_nt_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
180 static void tabledataid_nt_free(Tcl_Obj *o) {
181 TFREE(o->internalRep.otherValuePtr);
182 o->internalRep.otherValuePtr= 0;
185 static void tabledataid_nt_dup(Tcl_Obj *src, Tcl_Obj *dup) {
186 IdDataValue *sv, *dv;
188 sv= src->internalRep.otherValuePtr;
189 dv= TALLOC(sizeof(*dv));
191 dup->typePtr= &cht_tabledataid_nearlytype;
192 dup->internalRep.otherValuePtr= dv;
195 static void tabledataid_nt_ustr(Tcl_Obj *o) {
196 const IdDataValue *dv;
197 const IdDataAssocData *assoc;
198 const IdDataSpec *idds;
201 dv= o->internalRep.otherValuePtr;
205 snprintf(buf,sizeof(buf), "%d", dv->ix);
206 cht_obj_updatestr_vstringls(o,
207 idds->valprefix, strlen(idds->valprefix),
212 Tcl_ObjType cht_tabledataid_nearlytype = {
214 tabledataid_nt_free, tabledataid_nt_dup,
215 tabledataid_nt_ustr, tabledataid_nt_sfa