src/charneg.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2010 Index Data
   3  * See the file LICENSE for details.
   4  */
   5
   6 /**
   7  * \file charneg.c
   8  * \brief Implements Z39.50 Charset negotiation utilities
   9  *
  10  * Helper functions for Character Set and Language Negotiation - 3
  11  */
  12 #include <stdio.h>
  13 #include <yaz/otherinfo.h>
  14 #include <yaz/z-charneg.h>
  15 #include <yaz/charneg.h>
  16 #include <yaz/yaz-util.h>
  17 #include <yaz/oid_db.h>
  18
  19 static Z_External* z_ext_record2(ODR o, const char *buf)
  20 {
  21     Z_External *p;
  22     int len = strlen(buf);
  23
  24     if (!(p = (Z_External *)odr_malloc(o, sizeof(*p)))) return 0;
  25
  26     p->descriptor = 0;
  27     p->indirect_reference = 0;
  28
  29     p->direct_reference = odr_oiddup(o, yaz_oid_negot_charset_id);
  30
  31     p->which = Z_External_octet;
  32     if (!(p->u.octet_aligned = (Odr_oct *)odr_malloc(o, sizeof(Odr_oct)))) {
  33         return 0;
  34     }
  35     if (!(p->u.octet_aligned->buf = (unsigned char *)odr_malloc(o, len))) {
  36         return 0;
  37     }
  38     p->u.octet_aligned->len = p->u.octet_aligned->size = len;
  39     memcpy(p->u.octet_aligned->buf, buf, len);
  40
  41     return p;
  42 }
  43
  44 static int get_form(const char *charset)
  45 {
  46     int form = -1;
  47
  48
  49     if (!yaz_matchstr(charset, "UCS-2"))
  50         form = 2;
  51     if (!yaz_matchstr(charset, "UCS-4"))
  52         form = 4;
  53     if (!yaz_matchstr(charset, "UTF-16"))
  54         form = 5;
  55     if (!yaz_matchstr(charset, "UTF-8"))
  56         form = 8;
  57
  58     return form;
  59 }
  60
  61 static char *set_form (Odr_oid *encoding)
  62 {
  63     static char *charset = 0;
  64     if ( oid_oidlen(encoding) != 6)
  65         return 0;
  66     if (encoding[5] == 2)
  67         charset = "UCS-2";
  68     if (encoding[5] == 4)
  69         charset = "UCS-4";
  70     if (encoding[5] == 5)
  71         charset = "UTF-16";
  72     if (encoding[5] == 8)
  73         charset = "UTF-8";
  74     return charset;
  75 }
  76
  77 static Z_OriginProposal_0 *z_get_OriginProposal_0(ODR o, const char *charset)
  78 {
  79     int form = get_form (charset);
  80     Z_OriginProposal_0 *p0 =
  81         (Z_OriginProposal_0*)odr_malloc(o, sizeof(*p0));
  82
  83     memset(p0, 0, sizeof(*p0));
  84
  85     if (form > 0)
  86     {   /* ISO 10646 (UNICODE) */
  87         char oidname[20];
  88
  89         Z_Iso10646 *is = (Z_Iso10646 *) odr_malloc (o, sizeof(*is));
  90         p0->which = Z_OriginProposal_0_iso10646;
  91         p0->u.iso10646 = is;
  92         is->collections = 0;
  93         sprintf (oidname, "1.0.10646.1.0.%d", form);
  94         is->encodingLevel = odr_getoidbystr (o, oidname);
  95     }
  96     else
  97     {   /* private ones */
  98         Z_PrivateCharacterSet *pc =
  99             (Z_PrivateCharacterSet *)odr_malloc(o, sizeof(*pc));
 100
 101         memset(pc, 0, sizeof(*pc));
 102
 103         p0->which = Z_OriginProposal_0_private;
 104         p0->u.zprivate = pc;
 105
 106         pc->which = Z_PrivateCharacterSet_externallySpecified;
 107         pc->u.externallySpecified = z_ext_record2(o, charset);
 108     }
 109     return p0;
 110 }
 111
 112 static Z_OriginProposal *z_get_OriginProposal(
 113     ODR o, const char **charsets, int num_charsets,
 114     const char **langs, int num_langs, int selected)
 115 {
 116     int i;
 117     Z_OriginProposal *p = (Z_OriginProposal *) odr_malloc(o, sizeof(*p));
 118
 119     memset(p, 0, sizeof(*p));
 120
 121     p->recordsInSelectedCharSets = (bool_t *)odr_malloc(o, sizeof(bool_t));
 122     *p->recordsInSelectedCharSets = (selected) ? 1:0;
 123
 124     if (charsets && num_charsets) {
 125
 126         p->num_proposedCharSets = num_charsets;
 127         p->proposedCharSets =
 128             (Z_OriginProposal_0**)
 129             odr_malloc(o, num_charsets*sizeof(Z_OriginProposal_0*));
 130
 131         for (i = 0; i<num_charsets; i++)
 132             p->proposedCharSets[i] =
 133                 z_get_OriginProposal_0(o, charsets[i]);
 134     }
 135     if (langs && num_langs) {
 136
 137         p->num_proposedlanguages = num_langs;
 138
 139         p->proposedlanguages =
 140             (char **) odr_malloc(o, num_langs*sizeof(char *));
 141
 142         for (i = 0; i<num_langs; i++) {
 143
 144             p->proposedlanguages[i] = (char *)langs[i];
 145
 146         }
 147     }
 148     return p;
 149 }
 150
 151 static Z_CharSetandLanguageNegotiation *z_get_CharSetandLanguageNegotiation(
 152     ODR o)
 153 {
 154     Z_CharSetandLanguageNegotiation *p =
 155         (Z_CharSetandLanguageNegotiation *) odr_malloc(o, sizeof(*p));
 156
 157     memset(p, 0, sizeof(*p));
 158
 159     return p;
 160 }
 161
 162 /* Create EXTERNAL for negotation proposal. Client side */
 163 Z_External *yaz_set_proposal_charneg(ODR o,
 164                                      const char **charsets, int num_charsets,
 165                                      const char **langs, int num_langs,
 166                                      int selected)
 167 {
 168     Z_External *p = (Z_External *)odr_malloc(o, sizeof(*p));
 169
 170     p->descriptor = 0;
 171     p->indirect_reference = 0;
 172
 173     p->direct_reference = odr_oiddup(o, yaz_oid_negot_charset_3);
 174
 175     p->which = Z_External_charSetandLanguageNegotiation;
 176     p->u.charNeg3 = z_get_CharSetandLanguageNegotiation(o);
 177     p->u.charNeg3->which = Z_CharSetandLanguageNegotiation_proposal;
 178     p->u.charNeg3->u.proposal =
 179         z_get_OriginProposal(o, charsets, num_charsets,
 180                              langs, num_langs, selected);
 181
 182     return p;
 183 }
 184
 185 Z_External *yaz_set_proposal_charneg_list(ODR o,
 186                                           const char *delim,
 187                                           const char *charset_list,
 188                                           const char *lang_list,
 189                                           int selected)
 190 {
 191     char **charsets_addresses = 0;
 192     char **langs_addresses = 0;
 193     int charsets_count = 0;
 194     int langs_count = 0;
 195
 196     if (charset_list)
 197         nmem_strsplit(odr_getmem(o), delim, charset_list,
 198                       &charsets_addresses, &charsets_count);
 199     if (lang_list)
 200         nmem_strsplit(odr_getmem(o), delim, lang_list,
 201                       &langs_addresses, &langs_count);
 202     return yaz_set_proposal_charneg(o,
 203                                     (const char **) charsets_addresses,
 204                                     charsets_count,
 205                                     (const char **) langs_addresses,
 206                                     langs_count,
 207                                     selected);
 208 }
 209
 210
 211 /* used by yaz_set_response_charneg */
 212 static Z_TargetResponse *z_get_TargetResponse(ODR o, const char *charset,
 213                                               const char *lang, int selected)
 214 {
 215     Z_TargetResponse *p = (Z_TargetResponse *) odr_malloc(o, sizeof(*p));
 216     int form = get_form(charset);
 217
 218     memset(p, 0, sizeof(*p));
 219
 220     if (form > 0)
 221     {
 222         char oidname[20];
 223
 224         Z_Iso10646 *is = (Z_Iso10646 *) odr_malloc (o, sizeof(*is));
 225         p->which = Z_TargetResponse_iso10646;
 226         p->u.iso10646 = is;
 227         is->collections = 0;
 228         sprintf (oidname, "1.0.10646.1.0.%d", form);
 229         is->encodingLevel = odr_getoidbystr (o, oidname);
 230     }
 231     else
 232     {
 233         Z_PrivateCharacterSet *pc =
 234             (Z_PrivateCharacterSet *)odr_malloc(o, sizeof(*pc));
 235
 236         memset(pc, 0, sizeof(*pc));
 237
 238         p->which = Z_TargetResponse_private;
 239         p->u.zprivate = pc;
 240
 241         pc->which = Z_PrivateCharacterSet_externallySpecified;
 242         pc->u.externallySpecified =
 243             z_ext_record2(o, charset);
 244     }
 245     p->recordsInSelectedCharSets = (bool_t *)odr_malloc(o, sizeof(bool_t));
 246     *p->recordsInSelectedCharSets = (selected) ? 1:0;
 247
 248     p->selectedLanguage = lang ? (char *)odr_strdup(o, lang) : 0;
 249     return p;
 250 }
 251
 252 /* Create charset response. Server side */
 253 Z_External *yaz_set_response_charneg(ODR o, const char *charset,
 254                                      const char *lang, int selected)
 255 {
 256     Z_External *p = (Z_External *)odr_malloc(o, sizeof(*p));
 257
 258     p->descriptor = 0;
 259     p->indirect_reference = 0;
 260
 261     p->direct_reference = odr_oiddup(o, yaz_oid_negot_charset_3);
 262
 263     p->which = Z_External_charSetandLanguageNegotiation;
 264     p->u.charNeg3 = z_get_CharSetandLanguageNegotiation(o);
 265     p->u.charNeg3->which = Z_CharSetandLanguageNegotiation_response;
 266     p->u.charNeg3->u.response = z_get_TargetResponse(o, charset, lang, selected);
 267
 268     return p;
 269 }
 270
 271 /* Get negotiation from OtherInformation. Client&Server side */
 272 Z_CharSetandLanguageNegotiation *yaz_get_charneg_record(Z_OtherInformation *p)
 273 {
 274     int i;
 275
 276     if (!p)
 277         return 0;
 278
 279     for (i = 0; i < p->num_elements; i++) {
 280         Z_External *pext;
 281         if ((p->list[i]->which == Z_OtherInfo_externallyDefinedInfo) &&
 282             (pext = p->list[i]->information.externallyDefinedInfo)) {
 283
 284             if (!oid_oidcmp(pext->direct_reference, yaz_oid_negot_charset_3)
 285                 && pext->which == Z_External_charSetandLanguageNegotiation)
 286             {
 287                 return pext->u.charNeg3;
 288             }
 289         }
 290     }
 291     return 0;
 292 }
 293
 294 /* Delete negotiation from OtherInformation. Client&Server side */
 295 int yaz_del_charneg_record(Z_OtherInformation **p)
 296 {
 297     int i;
 298
 299     if (!*p)
 300         return 0;
 301
 302     for (i = 0; i < (*p)->num_elements; i++) {
 303         Z_External *pext;
 304         if (((*p)->list[i]->which == Z_OtherInfo_externallyDefinedInfo) &&
 305             (pext = (*p)->list[i]->information.externallyDefinedInfo))
 306         {
 307             if (!oid_oidcmp(pext->direct_reference, yaz_oid_negot_charset_3)
 308                 && pext->which == Z_External_charSetandLanguageNegotiation)
 309             {
 310                 if ((*p)->num_elements <= 1)
 311                     *p = 0;
 312                 else
 313                 {
 314                     --((*p)->num_elements);
 315                     for(; i < (*p)->num_elements; i++)
 316                         (*p)->list[i] = (*p)->list[i+1];
 317                 }
 318                 return 1;
 319             }
 320         }
 321     }
 322     return 0;
 323 }
 324
 325
 326 /* Get charsets, langs, selected from negotiation.. Server side */
 327 void yaz_get_proposal_charneg(NMEM mem, Z_CharSetandLanguageNegotiation *p,
 328                               char ***charsets, int *num_charsets,
 329                               char ***langs, int *num_langs, int *selected)
 330 {
 331     int i;
 332     Z_OriginProposal *pro = p->u.proposal;
 333
 334     if (num_charsets && charsets)
 335     {
 336         if (pro->num_proposedCharSets)
 337         {
 338             *num_charsets = pro->num_proposedCharSets;
 339
 340             (*charsets) = (char **)
 341                 nmem_malloc(mem, pro->num_proposedCharSets * sizeof(char *));
 342
 343             for (i=0; i<pro->num_proposedCharSets; i++)
 344             {
 345                 (*charsets)[i] = 0;
 346
 347                 if (pro->proposedCharSets[i]->which ==
 348                     Z_OriginProposal_0_private &&
 349                     pro->proposedCharSets[i]->u.zprivate->which ==
 350                     Z_PrivateCharacterSet_externallySpecified) {
 351
 352                     Z_External *pext =
 353                         pro->proposedCharSets[i]->u.zprivate->u.externallySpecified;
 354
 355                     if (pext->which == Z_External_octet) {
 356
 357                         (*charsets)[i] = (char *)
 358                             nmem_malloc(mem, (1+pext->u.octet_aligned->len) *
 359                                         sizeof(char));
 360
 361                         memcpy ((*charsets)[i], pext->u.octet_aligned->buf,
 362                                 pext->u.octet_aligned->len);
 363                         (*charsets)[i][pext->u.octet_aligned->len] = 0;
 364
 365                     }
 366                 }
 367                 else if (pro->proposedCharSets[i]->which ==
 368                          Z_OriginProposal_0_iso10646)
 369                     (*charsets)[i] = set_form (
 370                         pro->proposedCharSets[i]->u.iso10646->encodingLevel);
 371             }
 372         }
 373         else
 374             *num_charsets = 0;
 375     }
 376
 377     if (langs && num_langs)
 378     {
 379         if (pro->num_proposedlanguages)
 380         {
 381             *num_langs = pro->num_proposedlanguages;
 382
 383             (*langs) = (char **)
 384                 nmem_malloc(mem, pro->num_proposedlanguages * sizeof(char *));
 385
 386             for (i=0; i<pro->num_proposedlanguages; i++)
 387                 (*langs)[i] = nmem_strdup(mem, pro->proposedlanguages[i]);
 388         }
 389         else
 390             *num_langs = 0;
 391     }
 392
 393     if(pro->recordsInSelectedCharSets && selected)
 394         *selected = *pro->recordsInSelectedCharSets;
 395 }
 396
 397 /* Return charset, lang, selected from negotiation.. Client side */
 398 void yaz_get_response_charneg(NMEM mem, Z_CharSetandLanguageNegotiation *p,
 399                               char **charset, char **lang, int *selected)
 400 {
 401     Z_TargetResponse *res = p->u.response;
 402
 403     if (charset && res->which == Z_TargetResponse_private &&
 404         res->u.zprivate->which == Z_PrivateCharacterSet_externallySpecified) {
 405
 406         Z_External *pext = res->u.zprivate->u.externallySpecified;
 407
 408         if (pext->which == Z_External_octet) {
 409
 410             *charset = (char *)
 411                 nmem_malloc(mem, (1+pext->u.octet_aligned->len)*sizeof(char));
 412             memcpy (*charset, pext->u.octet_aligned->buf,
 413                     pext->u.octet_aligned->len);
 414             (*charset)[pext->u.octet_aligned->len] = 0;
 415         }
 416     }
 417     if (charset && res->which == Z_TargetResponse_iso10646)
 418         *charset = set_form (res->u.iso10646->encodingLevel);
 419     if (lang && res->selectedLanguage)
 420         *lang = nmem_strdup (mem, res->selectedLanguage);
 421
 422     if(selected && res->recordsInSelectedCharSets)
 423         *selected = *res->recordsInSelectedCharSets;
 424 }
 425 /*
 426  * Local variables:
 427  * c-basic-offset: 4
 428  * c-file-style: "Stroustrup"
 429  * indent-tabs-mode: nil
 430  * End:
 431  * vim: shiftwidth=4 tabstop=8 expandtab
 432  */
 433