src/yaz-cql2rpn.cpp

   1 /* This file is part of the yazpp toolkit.
   2  * Copyright (C) 1998-2011 Index Data and Mike Taylor
   3  * See the file LICENSE for details.
   4  */
   5
   6 #if HAVE_CONFIG_H
   7 #include <config.h>
   8 #endif
   9 #include <yaz/log.h>
  10 #include <yaz/pquery.h>
  11 #include <yazpp/cql2rpn.h>
  12
  13 using namespace yazpp_1;
  14
  15 Yaz_cql2rpn::Yaz_cql2rpn()
  16 {
  17     m_transform = 0;
  18 }
  19
  20 Yaz_cql2rpn::~Yaz_cql2rpn()
  21 {
  22     if (m_transform)
  23         cql_transform_close(m_transform);
  24 }
  25
  26 void Yaz_cql2rpn::set_pqf_file(const char *fname)
  27 {
  28     if (!m_transform)
  29         m_transform = cql_transform_open_fname(fname);
  30 }
  31
  32
  33 bool Yaz_cql2rpn::parse_spec_file(const char *fname, int *error)
  34 {
  35     *error = 0;
  36     cql_transform_close(m_transform);
  37     m_transform = cql_transform_open_fname(fname);
  38     return m_transform ? true : false;
  39 }
  40
  41 int Yaz_cql2rpn::query_transform(const char *cql_query,
  42                                  Z_RPNQuery **rpnquery, ODR o,
  43                                  char **addinfop)
  44 {
  45     const char *addinfo = 0;
  46     if (!m_transform)
  47         return -3;
  48     CQL_parser cp = cql_parser_create();
  49
  50     int r = cql_parser_string(cp, cql_query);
  51     if (r)
  52     {
  53         r = 10;
  54     }
  55     else
  56     {
  57         char rpn_buf[10240];
  58         r = cql_transform_buf(m_transform, cql_parser_result(cp),
  59                               rpn_buf, sizeof(rpn_buf)-1);
  60         if (!r)
  61         {
  62             YAZ_PQF_Parser pp = yaz_pqf_create();
  63
  64             *rpnquery = yaz_pqf_parse(pp, o, rpn_buf);
  65             if (!*rpnquery)
  66             {
  67                 size_t off;
  68                 const char *pqf_msg;
  69                 yaz_pqf_error(pp, &pqf_msg, &off);
  70                 r = -1;
  71             }
  72             yaz_pqf_destroy(pp);
  73         }
  74         else
  75         {
  76             r = cql_transform_error(m_transform, &addinfo);
  77         }
  78     }
  79     cql_parser_destroy(cp);
  80     if (addinfo)
  81         *addinfop = odr_strdup(o, addinfo);
  82     else
  83         *addinfop = 0;
  84     return r;
  85 }
  86 /*
  87  * Local variables:
  88  * c-basic-offset: 4
  89  * c-file-style: "Stroustrup"
  90  * indent-tabs-mode: nil
  91  * End:
  92  * vim: shiftwidth=4 tabstop=8 expandtab
  93  */
  94