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) {
34 static void mme_free(MaskMap_Entry *mme) {
35 TFREE(mme->prefix); mme->prefix=0;
36 if (mme->data) { Tcl_DecrRefCount(mme->data); mme->data=0; }
39 static int mme_parsekey(Tcl_Interp *ip, MaskMap_Entry *mme,
40 Tcl_Obj *prefixo, Tcl_Obj *prefixbitso,
42 /* *mme should be blank entry; after exit (even error exit) it will be valid
43 * - on errors, it will be blank. inmap is 1 if we're parsing an existing
44 * map or 0 if it's an entry to be added or modified. */
46 int suppliedprefixbytes, prefixbits, wantprefixbytes, sparebits;
50 hbytes_empty(&prefix);
52 rc= pat_hb(ip,prefixo,&prefix); if (rc) goto x_rc;
53 rc= pat_int(ip,prefixbitso,&prefixbits); if (rc) goto x_rc;
55 wantprefixbytes= prefix_bytes(prefixbits);
56 suppliedprefixbytes= hbytes_len(&prefix);
58 if (suppliedprefixbytes < wantprefixbytes) {
59 rc= staticerr(ip, "mask-map entry PREFIX too short for PREFIX-LEN",
60 "HBYTES MASKMAP SYNTAX UNDERRUN");
63 if (inmap && suppliedprefixbytes > wantprefixbytes) {
64 rc= staticerr(ip, "mask-map existing entry PREFIX too long for PREFIX-LEN",
65 "HBYTES MASKMAP SYNTAX OVERRUN");
68 sparebits= wantprefixbytes*8 - prefixbits;
69 data= hbytes_data(&prefix);
70 if (sparebits && (data[wantprefixbytes-1] & ((1u << sparebits)-1))) {
71 rc= staticerr(ip, "mask-map entry PREFIX contains bits excluded"
72 " by PREFIX-LEN", "HBYTES MASKMAP SYNTAX EXCLBITS");
76 mme->prefixlen= prefixbits;
77 mme->prefix= TALLOC(wantprefixbytes); assert(mme->prefix);
78 memcpy(mme->prefix, data, wantprefixbytes);
86 static int mme_ordercompare(MaskMap_Entry *a, MaskMap_Entry *b) {
87 if (a->prefixlen != b->prefixlen)
88 return a->prefixlen - b->prefixlen;
90 return memcmp(b->prefix, a->prefix, prefix_bytes(a->prefixlen));
93 /*---------- useful operations on MaskMap_Value etc. ----------*/
95 static int mm_count(const MaskMap_Value *mm) {
97 for (i=0; i<mm->allocd && mm->entries[i].prefixlen != -1; i++);
101 static void mm_init(MaskMap_Value *mm) {
106 static void mm_reallocentries(MaskMap_Value *mm, int len) {
108 MaskMap_Entry *newentries, *clear;
110 assert(len >= mm->allocd);
113 newentries= TREALLOC(mm->entries, sizeof(*newentries)*len);
116 for (i=mm->allocd, clear=newentries+mm->allocd;
122 mm->entries= newentries;
125 /*---------- substantial operations on mask maps ----------*/
127 int do_maskmap_amend(ClientData cd, Tcl_Interp *ip,
128 MaskMap_Var map, Tcl_Obj *prefix,
129 Tcl_Obj *preflen, Tcl_Obj *data) {
130 MaskMap_Value *mm= map.mm;
131 MaskMap_Entry mme, *search;
132 int rc, insertat, findend, cmp;
136 rc= mme_parsekey(ip,&mme,prefix,preflen,0); if (rc) goto x_rc;
138 for (insertat=0, search=mm->entries;
139 insertat < mm->allocd &&
140 search->prefixlen != -1;
141 insertat++, search++) {
142 cmp= mme_ordercompare(&mme,search);
145 Tcl_DecrRefCount(search->data);
149 /* the new one sorts later, insert it here */
153 /* we're adding an entry, make room for it */
154 findend= mm_count(mm);
155 if (findend == mm->allocd) {
156 mm_reallocentries(mm, mm->allocd*2 + 1);
157 search= mm->entries + insertat;
159 if (findend > insertat)
160 memmove(search + 1, search, sizeof(*search) * (findend - insertat));
164 Tcl_IncrRefCount(data);
173 int do_maskmap_lookup(ClientData cd, Tcl_Interp *ip,
174 Tcl_Obj *mapo, HBytes_Value addr, Tcl_Obj *def,
176 /*MaskMap_Var *map= (void*)&mapo->internalRep;*/
177 *result= Tcl_NewIntObj(42);
178 return TCL_OK; /*fixme*/
181 /*---------- Tcl type and arg parsing functions ----------*/
183 int pat_maskmapv(Tcl_Interp *ip, Tcl_Obj *var, MaskMap_Var *agg) {
185 rc= pat_somethingv(ip,var,&agg->sth,&maskmap_type); if (rc) return rc;
186 agg->mm= (void*)&agg->sth.obj->internalRep;
190 static void maskmap_t_free(Tcl_Obj *o) {
191 MaskMap_Value *mm= (void*)&o->internalRep;
195 for (i=0, mme=mm->entries; i<mm->allocd; i++, mme++) {
196 if (mme->prefixlen==-1) break;
201 static void maskmap_t_dup(Tcl_Obj *sob, Tcl_Obj *dob) {
202 MaskMap_Value *sm= (void*)&sob->internalRep;
203 MaskMap_Value *dm= (void*)&dob->internalRep;
204 MaskMap_Entry *sme, *dme;
207 assert(sob->typePtr == &maskmap_type);
212 mm_reallocentries(dm,l);
213 for (i=0, sme=sm->entries, dme=dm->entries;
217 nbytes= prefix_bytes(sme->prefixlen);
218 dme->prefix= TALLOC(nbytes); assert(dme->prefix);
219 memcpy(dme->prefix, sme->prefix, nbytes);
220 Tcl_IncrRefCount(dme->data);
222 dob->typePtr= &maskmap_type;
225 static void maskmap_t_ustr(Tcl_Obj *so) {
226 MaskMap_Value *sm= (void*)&so->internalRep;
227 Tcl_Obj **mainlobjsl, *mainobj;
230 assert(so->typePtr == &maskmap_type);
232 mainlobjsl= TALLOC(sizeof(*mainlobjsl) * l); assert(mainlobjsl);
234 for (i=0; i<l; i++) {
235 MaskMap_Entry *sme= &sm->entries[i];
237 Tcl_Obj *subl[3], *sublo;
239 hbytes_array(&hb, sme->prefix, prefix_bytes(sme->prefixlen));
240 subl[0]= ret_hb(0, hb); assert(subl[0]);
241 subl[1]= Tcl_NewIntObj(sme->prefixlen); assert(subl[1]);
244 sublo= Tcl_NewListObj(3,subl); assert(sublo);
245 mainlobjsl[i]= sublo;
248 mainobj= Tcl_NewListObj(l,mainlobjsl); assert(mainobj);
249 so->bytes= Tcl_GetStringFromObj(mainobj, &so->length); assert(so->bytes);
250 mainobj->bytes= 0; mainobj->length= 0; /* we stole it */
253 static int maskmap_t_sfa(Tcl_Interp *ip, Tcl_Obj *o) {
256 Tcl_Obj *eo, *prefixo, *prefixleno;
260 rc= Tcl_ListObjLength(ip,o,&len); if (rc) goto x_rc;
261 mm_reallocentries(&mm, len);
263 for (i=0; i<len; i++) {
264 rc= Tcl_ListObjIndex(ip,o,i,&eo); if (rc) goto x_rc;
265 rc= Tcl_ListObjLength(ip,eo,&eol); if (rc) goto x_rc;
267 rc= staticerr(ip, "mask-map entry length != 3",
268 "HBYTES MASKMAP SYNTAX LLENGTH");
271 rc= Tcl_ListObjIndex(ip,eo,0,&prefixo); if (rc) goto x_rc;
272 rc= Tcl_ListObjIndex(ip,eo,1,&prefixleno); if (rc) goto x_rc;
273 rc= Tcl_ListObjIndex(ip,eo,2,&mm.entries[i].data); if (rc) goto x_rc;
274 Tcl_IncrRefCount(mm.entries[i].data);
276 rc= mme_parsekey(ip, &mm.entries[i], prefixo, prefixleno, 1);
280 if (mme_ordercompare(&mm.entries[i-1], &mm.entries[i]) <= 0) {
281 rc= staticerr(ip, "mask-map entries out of order",
282 "HBYTES MASKMAP SYNTAX ORDER");
289 assert(sizeof(mm) <= sizeof(o->internalRep));
291 memcpy(&o->internalRep, &mm, sizeof(mm));
292 o->typePtr= &maskmap_type;
297 for (i=0; i<len; i++)
298 mme_free(&mm.entries[i]);
304 Tcl_ObjType maskmap_type = {
306 maskmap_t_free, maskmap_t_dup, maskmap_t_ustr, maskmap_t_sfa