src/record_conv.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file record_conv.c
   7  * \brief Record Conversions utility
   8  */
   9
  10 #if HAVE_CONFIG_H
  11 #include <config.h>
  12 #endif
  13
  14 #include <string.h>
  15 #include <yaz/yaz-iconv.h>
  16 #include <yaz/marcdisp.h>
  17 #include <yaz/record_conv.h>
  18 #include <yaz/wrbuf.h>
  19 #include <yaz/xmalloc.h>
  20 #include <yaz/nmem.h>
  21 #include <yaz/tpath.h>
  22 #include <yaz/z-opac.h>
  23
  24 #if YAZ_HAVE_XML2
  25 #include <libxml/parser.h>
  26 #include <libxml/tree.h>
  27 #include <libxml/xinclude.h>
  28 #if YAZ_HAVE_XSLT
  29 #include <libxslt/xsltutils.h>
  30 #include <libxslt/transform.h>
  31 #endif
  32 #if YAZ_HAVE_EXSLT
  33 #include <libexslt/exslt.h>
  34 #endif
  35
  36 /** \brief The internal structure for yaz_record_conv_t */
  37 struct yaz_record_conv_struct {
  38     /** \brief memory for configuration */
  39     NMEM nmem;
  40
  41     /** \brief conversion rules (allocated using NMEM) */
  42     struct yaz_record_conv_rule *rules;
  43
  44     /** \brief pointer to last conversion rule pointer in chain */
  45     struct yaz_record_conv_rule **rules_p;
  46
  47     /** \brief string buffer for error messages */
  48     WRBUF wr_error;
  49
  50     /** \brief path for opening files  */
  51     char *path;
  52 };
  53
  54 struct marc_info {
  55     NMEM nmem;
  56     const char *input_charset;
  57     const char *output_charset;
  58     int input_format_mode;
  59     int output_format_mode;
  60     const char *leader_spec;
  61 };
  62
  63 /** \brief tranformation info (rule info) */
  64 struct yaz_record_conv_rule {
  65     struct yaz_record_conv_type *type;
  66     void *info;
  67     struct yaz_record_conv_rule *next;
  68 };
  69
  70 /** \brief reset rules+configuration */
  71 static void yaz_record_conv_reset(yaz_record_conv_t p)
  72 {
  73
  74     struct yaz_record_conv_rule *r;
  75     for (r = p->rules; r; r = r->next)
  76     {
  77         r->type->destroy(r->info);
  78     }
  79     wrbuf_rewind(p->wr_error);
  80     nmem_reset(p->nmem);
  81
  82     p->rules = 0;
  83
  84     p->rules_p = &p->rules;
  85 }
  86
  87 void yaz_record_conv_destroy(yaz_record_conv_t p)
  88 {
  89     if (p)
  90     {
  91         yaz_record_conv_reset(p);
  92         nmem_destroy(p->nmem);
  93         wrbuf_destroy(p->wr_error);
  94
  95         xfree(p->path);
  96         xfree(p);
  97     }
  98 }
  99
 100 #if YAZ_HAVE_XSLT
 101 struct xslt_info {
 102     NMEM nmem;
 103     xmlDocPtr xsp_doc;
 104     const char **xsl_parms;
 105 };
 106
 107 static void *construct_xslt(const xmlNode *ptr,
 108                             const char *path, WRBUF wr_error)
 109 {
 110     struct _xmlAttr *attr;
 111     const char *stylesheet = 0;
 112     struct xslt_info *info = 0;
 113     NMEM nmem = 0;
 114     int max_parms = 10;
 115     int no_parms = 0;
 116
 117     if (strcmp((const char *) ptr->name, "xslt"))
 118         return 0;
 119
 120     for (attr = ptr->properties; attr; attr = attr->next)
 121     {
 122         if (!xmlStrcmp(attr->name, BAD_CAST "stylesheet") &&
 123             attr->children && attr->children->type == XML_TEXT_NODE)
 124             stylesheet = (const char *) attr->children->content;
 125         else
 126         {
 127             wrbuf_printf(wr_error, "Bad attribute '%s'"
 128                          "Expected stylesheet.", attr->name);
 129             return 0;
 130         }
 131     }
 132     nmem = nmem_create();
 133     info = nmem_malloc(nmem, sizeof(*info));
 134     info->nmem = nmem;
 135     info->xsl_parms = nmem_malloc(
 136         nmem, (2 * max_parms + 1) * sizeof(*info->xsl_parms));
 137
 138     for (ptr = ptr->children; ptr; ptr = ptr->next)
 139     {
 140         const char *name = 0;
 141         const char *value = 0;
 142         char *qvalue = 0;
 143         if (ptr->type != XML_ELEMENT_NODE)
 144             continue;
 145         if (strcmp((const char *) ptr->name, "param"))
 146         {
 147             wrbuf_printf(wr_error, "Bad element '%s'"
 148                          "Expected param.", ptr->name);
 149             nmem_destroy(nmem);
 150             return 0;
 151         }
 152         for (attr = ptr->properties; attr; attr = attr->next)
 153         {
 154             if (!xmlStrcmp(attr->name, BAD_CAST "name") &&
 155                 attr->children && attr->children->type == XML_TEXT_NODE)
 156                 name = (const char *) attr->children->content;
 157             else if (!xmlStrcmp(attr->name, BAD_CAST "value") &&
 158                 attr->children && attr->children->type == XML_TEXT_NODE)
 159                 value = (const char *) attr->children->content;
 160             else
 161             {
 162                 wrbuf_printf(wr_error, "Bad attribute '%s'"
 163                              "Expected name or value.", attr->name);
 164                 nmem_destroy(nmem);
 165                 return 0;
 166             }
 167         }
 168         if (!name || !value)
 169         {
 170             wrbuf_printf(wr_error, "Missing attributes name or value");
 171             nmem_destroy(nmem);
 172             return 0;
 173         }
 174         if (no_parms >= max_parms)
 175         {
 176             wrbuf_printf(wr_error, "Too many parameters given");
 177             nmem_destroy(nmem);
 178             return 0;
 179         }
 180
 181         qvalue = nmem_malloc(nmem, strlen(value) + 3);
 182         strcpy(qvalue, "\'");
 183         strcat(qvalue, value);
 184         strcat(qvalue, "\'");
 185
 186         info->xsl_parms[2 * no_parms] = nmem_strdup(nmem, name);
 187         info->xsl_parms[2 * no_parms + 1] = qvalue;
 188         no_parms++;
 189     }
 190
 191     info->xsl_parms[2 * no_parms] = '\0';
 192
 193     if (!stylesheet)
 194     {
 195         wrbuf_printf(wr_error, "Element <xslt>: "
 196                      "attribute 'stylesheet' expected");
 197         nmem_destroy(nmem);
 198     }
 199     else
 200     {
 201         char fullpath[1024];
 202         xsltStylesheetPtr xsp;
 203         if (!yaz_filepath_resolve(stylesheet, path, 0, fullpath))
 204         {
 205             wrbuf_printf(wr_error, "Element <xslt stylesheet=\"%s\"/>:"
 206                          " could not locate stylesheet '%s'",
 207                          stylesheet, stylesheet);
 208             if (path)
 209                 wrbuf_printf(wr_error, " with path '%s'", path);
 210
 211             nmem_destroy(nmem);
 212             return 0;
 213         }
 214         info->xsp_doc = xmlParseFile(fullpath);
 215         if (!info->xsp_doc)
 216         {
 217             wrbuf_printf(wr_error, "Element: <xslt stylesheet=\"%s\"/>:"
 218                          " xml parse failed: %s", stylesheet, fullpath);
 219             if (path)
 220                 wrbuf_printf(wr_error, " with path '%s'", path);
 221             nmem_destroy(nmem);
 222             return 0;
 223         }
 224         /* need to copy this before passing it to the processor. It will
 225            be encapsulated in the xsp and destroyed by xsltFreeStylesheet */
 226         xsp = xsltParseStylesheetDoc(xmlCopyDoc(info->xsp_doc, 1));
 227         if (!xsp)
 228         {
 229             wrbuf_printf(wr_error, "Element: <xslt stylesheet=\"%s\"/>:"
 230                          " xslt parse failed: %s", stylesheet, fullpath);
 231             if (path)
 232                 wrbuf_printf(wr_error, " with path '%s'", path);
 233             wrbuf_printf(wr_error, " ("
 234 #if YAZ_HAVE_EXSLT
 235
 236                          "EXSLT enabled"
 237 #else
 238                          "EXSLT not supported"
 239 #endif
 240                          ")");
 241             xmlFreeDoc(info->xsp_doc);
 242             nmem_destroy(info->nmem);
 243         }
 244         else
 245         {
 246             xsltFreeStylesheet(xsp);
 247             return info;
 248         }
 249     }
 250     return 0;
 251 }
 252
 253 static int convert_xslt(void *vinfo, WRBUF record, WRBUF wr_error)
 254 {
 255     int ret = 0;
 256     struct xslt_info *info = vinfo;
 257
 258     xmlDocPtr doc = xmlParseMemory(wrbuf_buf(record),
 259                                    wrbuf_len(record));
 260     if (!doc)
 261     {
 262         wrbuf_printf(wr_error, "xmlParseMemory failed");
 263         ret = -1;
 264     }
 265     else
 266     {
 267         xmlDocPtr xsp_doc = xmlCopyDoc(info->xsp_doc, 1);
 268         xsltStylesheetPtr xsp = xsltParseStylesheetDoc(xsp_doc);
 269         xmlDocPtr res = xsltApplyStylesheet(xsp, doc, info->xsl_parms);
 270         if (res)
 271         {
 272             xmlChar *out_buf = 0;
 273             int out_len;
 274
 275 #if HAVE_XSLTSAVERESULTTOSTRING
 276             xsltSaveResultToString(&out_buf, &out_len, res, xsp);
 277 #else
 278             xmlDocDumpFormatMemory (res, &out_buf, &out_len, 1);
 279 #endif
 280             if (!out_buf)
 281             {
 282                 wrbuf_printf(wr_error,
 283                              "xsltSaveResultToString failed");
 284                 ret = -1;
 285             }
 286             else
 287             {
 288                 wrbuf_rewind(record);
 289                 wrbuf_write(record, (const char *) out_buf, out_len);
 290
 291                 xmlFree(out_buf);
 292             }
 293             xmlFreeDoc(res);
 294         }
 295         else
 296         {
 297             wrbuf_printf(wr_error, "xsltApplyStylesheet failed");
 298             ret = -1;
 299         }
 300         xmlFreeDoc(doc);
 301         xsltFreeStylesheet(xsp); /* frees xsp_doc too */
 302     }
 303     return ret;
 304 }
 305
 306 static void destroy_xslt(void *vinfo)
 307 {
 308     struct xslt_info *info = vinfo;
 309
 310     if (info)
 311     {
 312         xmlFreeDoc(info->xsp_doc);
 313         nmem_destroy(info->nmem);
 314     }
 315 }
 316
 317 /* YAZ_HAVE_XSLT */
 318 #endif
 319
 320 static void *construct_solrmarc(const xmlNode *ptr,
 321                                 const char *path, WRBUF wr_error)
 322 {
 323     if (strcmp((const char *) ptr->name, "solrmarc"))
 324         return 0;
 325     return wr_error; /* any non-null ptr will do; we don't use it later*/
 326 }
 327
 328 static int convert_solrmarc(void *info, WRBUF record, WRBUF wr_error)
 329 {
 330     WRBUF w = wrbuf_alloc();
 331     const char *buf = wrbuf_buf(record);
 332     size_t i, sz = wrbuf_len(record);
 333     for (i = 0; i < sz; i++)
 334     {
 335         int ch;
 336         if (buf[i] == '#' && i < sz - 3 && buf[i+3] == ';'
 337             && atoi_n_check(buf+i+1, 2, &ch))
 338             i += 3;
 339         else
 340             ch = buf[i];
 341         wrbuf_putc(w, ch);
 342     }
 343     wrbuf_rewind(record);
 344     wrbuf_write(record, wrbuf_buf(w), wrbuf_len(w));
 345     wrbuf_destroy(w);
 346     return 0;
 347 }
 348
 349 static void destroy_solrmarc(void *info)
 350 {
 351 }
 352
 353 static void *construct_marc(const xmlNode *ptr,
 354                             const char *path, WRBUF wr_error)
 355 {
 356     NMEM nmem = nmem_create();
 357     struct marc_info *info = nmem_malloc(nmem, sizeof(*info));
 358     struct _xmlAttr *attr;
 359     const char *input_format = 0;
 360     const char *output_format = 0;
 361
 362     if (strcmp((const char *) ptr->name, "marc"))
 363     {
 364         nmem_destroy(nmem);
 365         return 0;
 366     }
 367     info->nmem = nmem;
 368     info->input_charset = 0;
 369     info->output_charset = 0;
 370     info->input_format_mode = 0;
 371     info->output_format_mode = 0;
 372     info->leader_spec = 0;
 373
 374     for (attr = ptr->properties; attr; attr = attr->next)
 375     {
 376         if (!xmlStrcmp(attr->name, BAD_CAST "inputcharset") &&
 377             attr->children && attr->children->type == XML_TEXT_NODE)
 378             info->input_charset = (const char *) attr->children->content;
 379         else if (!xmlStrcmp(attr->name, BAD_CAST "outputcharset") &&
 380             attr->children && attr->children->type == XML_TEXT_NODE)
 381             info->output_charset = (const char *) attr->children->content;
 382         else if (!xmlStrcmp(attr->name, BAD_CAST "inputformat") &&
 383             attr->children && attr->children->type == XML_TEXT_NODE)
 384             input_format = (const char *) attr->children->content;
 385         else if (!xmlStrcmp(attr->name, BAD_CAST "outputformat") &&
 386             attr->children && attr->children->type == XML_TEXT_NODE)
 387             output_format = (const char *) attr->children->content;
 388         else if (!xmlStrcmp(attr->name, BAD_CAST "leaderspec") &&
 389                  attr->children && attr->children->type == XML_TEXT_NODE)
 390             info->leader_spec =
 391                 nmem_strdup(info->nmem,(const char *) attr->children->content);
 392         else
 393         {
 394             wrbuf_printf(wr_error, "Element <marc>: expected attributes"
 395                          "'inputformat', 'inputcharset', 'outputformat' or"
 396                          " 'outputcharset', got attribute '%s'",
 397                          attr->name);
 398             nmem_destroy(info->nmem);
 399             return 0;
 400         }
 401     }
 402     if (!input_format)
 403     {
 404         wrbuf_printf(wr_error, "Element <marc>: "
 405                      "attribute 'inputformat' required");
 406         nmem_destroy(info->nmem);
 407         return 0;
 408     }
 409     else if (!strcmp(input_format, "marc"))
 410     {
 411         info->input_format_mode = YAZ_MARC_ISO2709;
 412     }
 413     else if (!strcmp(input_format, "xml"))
 414     {
 415         info->input_format_mode = YAZ_MARC_MARCXML;
 416         /** Libxml2 generates UTF-8 encoding by default .
 417             So we convert from UTF-8 to outputcharset (if defined)
 418         */
 419         if (!info->input_charset && info->output_charset)
 420             info->input_charset = "utf-8";
 421     }
 422     else if (!strcmp(input_format, "json"))
 423     {
 424         info->input_format_mode = YAZ_MARC_JSON;
 425     }
 426     else
 427     {
 428         wrbuf_printf(wr_error, "Element <marc inputformat='%s'>: "
 429                      " Unsupported input format"
 430                      " defined by attribute value",
 431                      input_format);
 432         nmem_destroy(info->nmem);
 433         return 0;
 434     }
 435
 436     if (!output_format)
 437     {
 438         wrbuf_printf(wr_error,
 439                      "Element <marc>: attribute 'outputformat' required");
 440         nmem_destroy(info->nmem);
 441         return 0;
 442     }
 443     else if (!strcmp(output_format, "line"))
 444     {
 445         info->output_format_mode = YAZ_MARC_LINE;
 446     }
 447     else if (!strcmp(output_format, "marcxml"))
 448     {
 449         info->output_format_mode = YAZ_MARC_MARCXML;
 450         if (info->input_charset && !info->output_charset)
 451             info->output_charset = "utf-8";
 452     }
 453     else if (!strcmp(output_format, "turbomarc"))
 454     {
 455         info->output_format_mode = YAZ_MARC_TURBOMARC;
 456         if (info->input_charset && !info->output_charset)
 457             info->output_charset = "utf-8";
 458     }
 459     else if (!strcmp(output_format, "marc"))
 460     {
 461         info->output_format_mode = YAZ_MARC_ISO2709;
 462     }
 463     else if (!strcmp(output_format, "marcxchange"))
 464     {
 465         info->output_format_mode = YAZ_MARC_XCHANGE;
 466         if (info->input_charset && !info->output_charset)
 467             info->output_charset = "utf-8";
 468     }
 469     else if (!strcmp(output_format, "json"))
 470     {
 471         info->output_format_mode = YAZ_MARC_JSON;
 472         if (info->input_charset && !info->output_charset)
 473             info->output_charset = "utf-8";
 474     }
 475     else
 476     {
 477         wrbuf_printf(wr_error, "Element <marc outputformat='%s'>: "
 478                      " Unsupported output format"
 479                      " defined by attribute value",
 480                      output_format);
 481         nmem_destroy(info->nmem);
 482         return 0;
 483     }
 484     if (info->input_charset && info->output_charset)
 485     {
 486         yaz_iconv_t cd = yaz_iconv_open(info->output_charset,
 487                                         info->input_charset);
 488         if (!cd)
 489         {
 490             wrbuf_printf(wr_error,
 491                          "Element <marc inputcharset='%s' outputcharset='%s'>:"
 492                          " Unsupported character set mapping"
 493                          " defined by attribute values",
 494                          info->input_charset, info->output_charset);
 495             nmem_destroy(info->nmem);
 496             return 0;
 497         }
 498         yaz_iconv_close(cd);
 499     }
 500     else if (!info->output_charset)
 501     {
 502         wrbuf_printf(wr_error, "Element <marc>: "
 503                      "attribute 'outputcharset' missing");
 504         nmem_destroy(info->nmem);
 505         return 0;
 506     }
 507     else if (!info->input_charset)
 508     {
 509         wrbuf_printf(wr_error, "Element <marc>: "
 510                      "attribute 'inputcharset' missing");
 511         nmem_destroy(info->nmem);
 512         return 0;
 513     }
 514     info->input_charset = nmem_strdup(info->nmem, info->input_charset);
 515     info->output_charset = nmem_strdup(info->nmem, info->output_charset);
 516     return info;
 517 }
 518
 519 static int convert_marc(void *info, WRBUF record, WRBUF wr_error)
 520 {
 521     struct marc_info *mi = info;
 522     int ret = 0;
 523
 524     yaz_iconv_t cd = yaz_iconv_open(mi->output_charset, mi->input_charset);
 525     yaz_marc_t mt = yaz_marc_create();
 526
 527     yaz_marc_xml(mt, mi->output_format_mode);
 528     if (mi->leader_spec)
 529         yaz_marc_leader_spec(mt, mi->leader_spec);
 530
 531     if (cd)
 532         yaz_marc_iconv(mt, cd);
 533     if (mi->input_format_mode == YAZ_MARC_ISO2709)
 534     {
 535         int sz = yaz_marc_read_iso2709(mt, wrbuf_buf(record),
 536                                        wrbuf_len(record));
 537         if (sz > 0)
 538             ret = 0;
 539         else
 540             ret = -1;
 541     }
 542     else if (mi->input_format_mode == YAZ_MARC_MARCXML ||
 543              mi->input_format_mode == YAZ_MARC_TURBOMARC)
 544     {
 545         xmlDocPtr doc = xmlParseMemory(wrbuf_buf(record),
 546                                        wrbuf_len(record));
 547         if (!doc)
 548         {
 549             wrbuf_printf(wr_error, "xmlParseMemory failed");
 550             ret = -1;
 551         }
 552         else
 553         {
 554             ret = yaz_marc_read_xml(mt, xmlDocGetRootElement(doc));
 555             if (ret)
 556                 wrbuf_printf(wr_error, "yaz_marc_read_xml failed");
 557         }
 558         xmlFreeDoc(doc);
 559     }
 560     else
 561     {
 562         wrbuf_printf(wr_error, "unsupported input format");
 563         ret = -1;
 564     }
 565     if (ret == 0)
 566     {
 567         wrbuf_rewind(record);
 568         ret = yaz_marc_write_mode(mt, record);
 569         if (ret)
 570             wrbuf_printf(wr_error, "yaz_marc_write_mode failed");
 571     }
 572     if (cd)
 573         yaz_iconv_close(cd);
 574     yaz_marc_destroy(mt);
 575     return ret;
 576 }
 577
 578 static void destroy_marc(void *info)
 579 {
 580     struct marc_info *mi = info;
 581
 582     nmem_destroy(mi->nmem);
 583 }
 584
 585 int yaz_record_conv_configure_t(yaz_record_conv_t p, const xmlNode *ptr,
 586                                 struct yaz_record_conv_type *types)
 587 {
 588     struct yaz_record_conv_type bt[3];
 589     size_t i = 0;
 590
 591     /* register marc */
 592     bt[i].construct = construct_marc;
 593     bt[i].convert = convert_marc;
 594     bt[i++].destroy = destroy_marc;
 595
 596     bt[i-1].next = &bt[i];
 597     bt[i].construct = construct_solrmarc;
 598     bt[i].convert = convert_solrmarc;
 599     bt[i++].destroy = destroy_solrmarc;
 600
 601 #if YAZ_HAVE_XSLT
 602     /* register xslt */
 603     bt[i-1].next = &bt[i];
 604     bt[i].construct = construct_xslt;
 605     bt[i].convert = convert_xslt;
 606     bt[i++].destroy = destroy_xslt;
 607 #endif
 608
 609     bt[i-1].next = types;
 610     yaz_record_conv_reset(p);
 611
 612     /* parsing element children */
 613     for (ptr = ptr->children; ptr; ptr = ptr->next)
 614     {
 615         struct yaz_record_conv_type *t;
 616         struct yaz_record_conv_rule *r;
 617         void *info = 0;
 618         if (ptr->type != XML_ELEMENT_NODE)
 619             continue;
 620         for (t = &bt[0]; t; t = t->next)
 621         {
 622             wrbuf_rewind(p->wr_error);
 623             info = t->construct(ptr, p->path, p->wr_error);
 624
 625             if (info || wrbuf_len(p->wr_error))
 626                 break;
 627             /* info== 0 and no error reported , ie not handled by it */
 628         }
 629         if (!info)
 630         {
 631             if (wrbuf_len(p->wr_error) == 0)
 632                 wrbuf_printf(p->wr_error, "Element <backend>: expected "
 633                              "<marc> or <xslt> element, got <%s>"
 634                              , ptr->name);
 635             return -1;
 636         }
 637         r = (struct yaz_record_conv_rule *) nmem_malloc(p->nmem, sizeof(*r));
 638         r->next = 0;
 639         r->info = info;
 640         r->type = nmem_malloc(p->nmem, sizeof(*t));
 641         memcpy(r->type, t, sizeof(*t));
 642         *p->rules_p = r;
 643         p->rules_p = &r->next;
 644     }
 645     return 0;
 646 }
 647
 648 int yaz_record_conv_configure(yaz_record_conv_t p, const xmlNode *ptr)
 649 {
 650     return yaz_record_conv_configure_t(p, ptr, 0);
 651 }
 652
 653 static int yaz_record_conv_record_rule(yaz_record_conv_t p,
 654                                        struct yaz_record_conv_rule *r,
 655                                        const char *input_record_buf,
 656                                        size_t input_record_len,
 657                                        WRBUF output_record)
 658 {
 659     int ret = 0;
 660     WRBUF record = output_record; /* pointer transfer */
 661     wrbuf_rewind(p->wr_error);
 662
 663     wrbuf_write(record, input_record_buf, input_record_len);
 664     for (; ret == 0 && r; r = r->next)
 665         ret = r->type->convert(r->info, record, p->wr_error);
 666     return ret;
 667 }
 668
 669 int yaz_record_conv_opac_record(yaz_record_conv_t p,
 670                                 Z_OPACRecord *input_record,
 671                                 WRBUF output_record)
 672 {
 673     int ret = 0;
 674     struct yaz_record_conv_rule *r = p->rules;
 675     if (!r || r->type->construct != construct_marc)
 676     {
 677         wrbuf_puts(p->wr_error, "Expecting MARC rule as first rule for OPAC");
 678         ret = -1; /* no marc rule so we can't do OPAC */
 679     }
 680     else
 681     {
 682         struct marc_info *mi = r->info;
 683
 684         WRBUF res = wrbuf_alloc();
 685         yaz_marc_t mt = yaz_marc_create();
 686         yaz_iconv_t cd = yaz_iconv_open(mi->output_charset,
 687                                         mi->input_charset);
 688
 689         wrbuf_rewind(p->wr_error);
 690         yaz_marc_xml(mt, mi->output_format_mode);
 691
 692         yaz_marc_iconv(mt, cd);
 693
 694         yaz_opac_decode_wrbuf(mt, input_record, res);
 695         if (ret != -1)
 696         {
 697             ret = yaz_record_conv_record_rule(p,
 698                                               r->next,
 699                                               wrbuf_buf(res), wrbuf_len(res),
 700                                               output_record);
 701         }
 702         yaz_marc_destroy(mt);
 703         if (cd)
 704             yaz_iconv_close(cd);
 705         wrbuf_destroy(res);
 706     }
 707     return ret;
 708 }
 709
 710 int yaz_record_conv_record(yaz_record_conv_t p,
 711                            const char *input_record_buf,
 712                            size_t input_record_len,
 713                            WRBUF output_record)
 714 {
 715     return yaz_record_conv_record_rule(p, p->rules,
 716                                        input_record_buf,
 717                                        input_record_len, output_record);
 718 }
 719
 720 const char *yaz_record_conv_get_error(yaz_record_conv_t p)
 721 {
 722     return wrbuf_cstr(p->wr_error);
 723 }
 724
 725 void yaz_record_conv_set_path(yaz_record_conv_t p, const char *path)
 726 {
 727     xfree(p->path);
 728     p->path = 0;
 729     if (path)
 730         p->path = xstrdup(path);
 731 }
 732
 733 yaz_record_conv_t yaz_record_conv_create()
 734 {
 735     yaz_record_conv_t p = (yaz_record_conv_t) xmalloc(sizeof(*p));
 736     p->nmem = nmem_create();
 737     p->wr_error = wrbuf_alloc();
 738     p->rules = 0;
 739     p->path = 0;
 740     return p;
 741 }
 742
 743 /* YAZ_HAVE_XML2 */
 744 #endif
 745
 746 /*
 747  * Local variables:
 748  * c-basic-offset: 4
 749  * c-file-style: "Stroustrup"
 750  * indent-tabs-mode: nil
 751  * End:
 752  * vim: shiftwidth=4 tabstop=8 expandtab
 753  */
 754