10 int prefixlen; /* there may be some empty slots with prefixlen==-1 at end */
11 Byte *prefix; /* ceil(prefixlen/8) bytes */
15 struct MaskMap_Value {
17 MaskMap_Entry *entries;
18 }; /* overlays internalRep */
20 /*---------- useful stuff ----------*/
22 static int prefix_bytes (int prefixlen) {
23 return (prefixlen + 7)/8;
26 /*---------- operations on MaskMap_Entry ----------*/
28 static void mme_init(MaskMap_Entry *mme) {
33 static void mme_free(MaskMap_Entry *mme) {
34 TFREE(mme->prefix); mme->prefix=0;
35 if (mme->data) { Tcl_DecrRefCount(mme->data); mme->data=0; }
38 static int mme_parsekey(Tcl_Interp *ip, MaskMap_Entry *mme,
39 Tcl_Obj *prefixo, Tcl_Obj *prefixleno,
41 /* *mme should be blank entry; after exit (even error exit) it will be valid
42 * - on errors, it will be blank. inmap is 1 if we're parsing an existing
43 * map or 0 if it's an entry to be added or modified. */
45 int suppliedprefixbytes, prefixlen, wantprefixbytes;
48 hbytes_empty(&prefix);
50 rc= pat_hb(ip,prefixo,&prefix); if (rc) goto x_rc;
51 rc= pat_int(ip,prefixleno,&prefixlen); if (rc) goto x_rc;
53 wantprefixbytes= prefix_bytes(prefixlen);
54 suppliedprefixbytes= hbytes_len(&prefix);
56 if (suppliedprefixbytes < wantprefixbytes) {
57 rc= staticerr(ip, "mask-map entry PREFIX too short for PREFIX-LEN",
58 "HBYTES MASKMAP SYNTAX UNDERRUN");
61 if (inmap && suppliedprefixbytes > wantprefixbytes) {
62 rc= staticerr(ip, "mask-map existing entry PREFIX too long for PREFIX-LEN",
63 "HBYTES MASKMAP SYNTAX OVERRUN");
66 mme->prefixlen= prefixlen;
67 mme->prefix= TALLOC(wantprefixbytes); assert(mme->prefix);
68 memcpy(mme->prefix, hbytes_data(&prefix), wantprefixbytes);
76 static int mme_ordercompare(MaskMap_Entry *a, MaskMap_Entry *b) {
77 if (a->prefixlen != b->prefixlen)
78 return a->prefixlen - b->prefixlen;
80 return memcmp(b->prefix, a->prefix, prefix_bytes(a->prefixlen));
83 /*---------- useful operations on MaskMap_Value etc. ----------*/
85 static int mm_count(const MaskMap_Value *mm) {
87 for (i=0; i<mm->allocd && mm->entries[i].prefixlen != -1; i++);
91 static void mm_allocentries(MaskMap_Value *mm, int len) {
94 mm->entries= TALLOC(sizeof(*mm->entries) * len);
96 for (i=0; i < len; i++)
97 mme_init(&mm->entries[i]);
100 /*---------- substantial operations on mask maps ----------*/
102 int do_maskmap_amend(ClientData cd, Tcl_Interp *ip,
103 MaskMap_Var map, HBytes_Value prefix,
104 int preflen, Tcl_Obj *data) {
105 return TCL_OK; /*fixme*/
108 int do_maskmap_lookup(ClientData cd, Tcl_Interp *ip,
109 MaskMap_Var map, HBytes_Value addr, Tcl_Obj *def,
111 *result= Tcl_NewIntObj(42);
112 return TCL_OK; /*fixme*/
115 /*---------- Tcl type and arg parsing functions ----------*/
117 int pat_maskmapv(Tcl_Interp *ip, Tcl_Obj *var, MaskMap_Var *agg) {
119 rc= pat_somethingv(ip,var,&agg->sth,&maskmap_type); if (rc) return rc;
120 agg->mm= (void*)&agg->sth.obj->internalRep;
124 static void maskmap_t_free(Tcl_Obj *o) {
125 MaskMap_Value *mm= (void*)&o->internalRep;
129 for (i=0, mme=mm->entries; i<mm->allocd; i++, mme++) {
130 if (mme->prefixlen==-1) break;
135 static void maskmap_t_dup(Tcl_Obj *sob, Tcl_Obj *dob) {
136 MaskMap_Value *sm= (void*)&sob->internalRep;
137 MaskMap_Value *dm= (void*)&dob->internalRep;
138 MaskMap_Entry *sme, *dme;
141 assert(sob->typePtr == &maskmap_type);
145 mm_allocentries(dm,l);
146 for (i=0, sme=sm->entries, dme=dm->entries;
150 nbytes= prefix_bytes(sme->prefixlen);
151 dme->prefix= TALLOC(nbytes); assert(dme->prefix);
152 memcpy(dme->prefix, sme->prefix, nbytes);
153 Tcl_IncrRefCount(dme->data);
155 dob->typePtr= &maskmap_type;
158 static void maskmap_t_ustr(Tcl_Obj *so) {
159 MaskMap_Value *sm= (void*)&so->internalRep;
160 Tcl_Obj **mainlobjsl, *mainobj;
163 assert(so->typePtr == &maskmap_type);
165 mainlobjsl= TALLOC(sizeof(*mainlobjsl) * l); assert(mainlobjsl);
167 for (i=0; i<l; i++) {
168 MaskMap_Entry *sme= &sm->entries[i];
170 Tcl_Obj *subl[3], *sublo;
172 hbytes_array(&hb, sme->prefix, prefix_bytes(sme->prefixlen));
173 subl[0]= ret_hb(0, hb); assert(subl[0]);
174 subl[1]= Tcl_NewIntObj(sme->prefixlen); assert(subl[1]);
177 sublo= Tcl_NewListObj(3,subl); assert(sublo);
178 mainlobjsl[i]= sublo;
181 mainobj= Tcl_NewListObj(l,mainlobjsl); assert(mainobj);
182 so->bytes= Tcl_GetStringFromObj(mainobj, &so->length); assert(so->bytes);
183 mainobj->bytes= 0; mainobj->length= 0; /* we stole it */
186 static int maskmap_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
189 Tcl_Obj *eo, *prefixo, *prefixleno;
194 rc= Tcl_ListObjLength(ip,o,&len); if (rc) goto x_rc;
195 mm_allocentries(&mm, len);
197 for (i=0; i<len; i++) {
198 rc= Tcl_ListObjIndex(ip,o,i,&eo); if (rc) goto x_rc;
199 rc= Tcl_ListObjLength(ip,eo,&eol); if (rc) goto x_rc;
201 rc= staticerr(ip, "mask-map entry length != 3",
202 "HBYTES MASKMAP SYNTAX LLENGTH");
205 rc= Tcl_ListObjIndex(ip,eo,0,&prefixo); if (rc) goto x_rc;
206 rc= Tcl_ListObjIndex(ip,eo,1,&prefixleno); if (rc) goto x_rc;
207 rc= Tcl_ListObjIndex(ip,eo,2,&mm.entries[i].data); if (rc) goto x_rc;
208 Tcl_IncrRefCount(mm.entries[i].data);
210 rc= mme_parsekey(ip, &mm.entries[i], prefixo, prefixleno, 1);
214 if (mme_ordercompare(&mm.entries[i-1], &mm.entries[i]) <= 0) {
215 rc= staticerr(ip, "mask-map entries out of order",
216 "HBYTES MASKMAP SYNTAX ORDER");
223 assert(sizeof(mm) <= sizeof(o->internalRep));
225 memcpy(&o->internalRep, &mm, sizeof(mm));
226 o->typePtr= &maskmap_type;
231 for (i=0; i<len; i++)
232 mme_free(&mm.entries[i]);
238 Tcl_ObjType maskmap_type = {
240 maskmap_t_free, maskmap_t_dup, maskmap_t_ustr, maskmap_t_sfa