src/yaz-cql2rpn.cpp

   1 /* This file is part of the yazpp toolkit.
   2  * Copyright (C) 1998-2010 Index Data and Mike Taylor
   3  * See the file LICENSE for details.
   4  */
   5
   6 #include <yaz/log.h>
   7 #include <yaz/pquery.h>
   8 #include <yazpp/cql2rpn.h>
   9
  10 using namespace yazpp_1;
  11
  12 Yaz_cql2rpn::Yaz_cql2rpn()
  13 {
  14     m_transform = 0;
  15 }
  16
  17 Yaz_cql2rpn::~Yaz_cql2rpn()
  18 {
  19     if (m_transform)
  20         cql_transform_close(m_transform);
  21 }
  22
  23 void Yaz_cql2rpn::set_pqf_file(const char *fname)
  24 {
  25     if (!m_transform)
  26         m_transform = cql_transform_open_fname(fname);
  27 }
  28
  29
  30 bool Yaz_cql2rpn::parse_spec_file(const char *fname, int *error)
  31 {
  32     *error = 0;
  33     cql_transform_close(m_transform);
  34     m_transform = cql_transform_open_fname(fname);
  35     return m_transform ? true : false;
  36 }
  37
  38 int Yaz_cql2rpn::query_transform(const char *cql_query,
  39                                  Z_RPNQuery **rpnquery, ODR o,
  40                                  char **addinfop)
  41 {
  42     const char *addinfo = 0;
  43     if (!m_transform)
  44         return -3;
  45     CQL_parser cp = cql_parser_create();
  46
  47     int r = cql_parser_string(cp, cql_query);
  48     if (r)
  49     {
  50         r = 10;
  51     }
  52     else
  53     {
  54         char rpn_buf[10240];
  55         r = cql_transform_buf(m_transform, cql_parser_result(cp),
  56                               rpn_buf, sizeof(rpn_buf)-1);
  57         if (!r)
  58         {
  59             YAZ_PQF_Parser pp = yaz_pqf_create();
  60
  61             *rpnquery = yaz_pqf_parse(pp, o, rpn_buf);
  62             if (!*rpnquery)
  63             {
  64                 size_t off;
  65                 const char *pqf_msg;
  66                 yaz_pqf_error(pp, &pqf_msg, &off);
  67                 r = -1;
  68             }
  69             yaz_pqf_destroy(pp);
  70         }
  71         else
  72         {
  73             r = cql_transform_error(m_transform, &addinfo);
  74         }
  75     }
  76     cql_parser_destroy(cp);
  77     if (addinfo)
  78         *addinfop = odr_strdup(o, addinfo);
  79     else
  80         *addinfop = 0;
  81     return r;
  82 }
  83 /*
  84  * Local variables:
  85  * c-basic-offset: 4
  86  * c-file-style: "Stroustrup"
  87  * indent-tabs-mode: nil
  88  * End:
  89  * vim: shiftwidth=4 tabstop=8 expandtab
  90  */
  91