src/yaz-cql2rpn.cpp

   1 /* This file is part of the yazpp toolkit.
   2  * Copyright (C) 1998-2013 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/diagsrw.h>
  11 #include <yaz/pquery.h>
  12 #include <yazpp/cql2rpn.h>
  13
  14 using namespace yazpp_1;
  15
  16 Yaz_cql2rpn::Yaz_cql2rpn()
  17 {
  18     m_transform = 0;
  19 }
  20
  21 Yaz_cql2rpn::~Yaz_cql2rpn()
  22 {
  23     if (m_transform)
  24         cql_transform_close(m_transform);
  25 }
  26
  27 void Yaz_cql2rpn::set_pqf_file(const char *fname)
  28 {
  29     if (!m_transform)
  30         m_transform = cql_transform_open_fname(fname);
  31 }
  32
  33
  34 bool Yaz_cql2rpn::parse_spec_file(const char *fname, int *error)
  35 {
  36     *error = 0;
  37     cql_transform_close(m_transform);
  38     m_transform = cql_transform_open_fname(fname);
  39     return m_transform ? true : false;
  40 }
  41
  42 int Yaz_cql2rpn::query_transform(const char *cql_query,
  43                                  Z_RPNQuery **rpnquery, ODR o,
  44                                  char **addinfop)
  45 {
  46     const char *addinfo = 0;
  47     if (!m_transform)
  48         return -3;
  49     CQL_parser cp = cql_parser_create();
  50
  51     int r = cql_parser_string(cp, cql_query);
  52     if (r)
  53     {
  54         r = YAZ_SRW_QUERY_SYNTAX_ERROR;
  55     }
  56     else
  57     {
  58         WRBUF w = wrbuf_alloc();
  59         r = cql_transform(m_transform, cql_parser_result(cp), wrbuf_vp_puts, w);
  60         if (!r)
  61         {
  62             YAZ_PQF_Parser pp = yaz_pqf_create();
  63
  64             *rpnquery = yaz_pqf_parse(pp, o, wrbuf_cstr(w));
  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         wrbuf_destroy(w);
  79     }
  80     cql_parser_destroy(cp);
  81     *addinfop = odr_strdup_null(o, addinfo);
  82     return r;
  83 }
  84 /*
  85  * Local variables:
  86  * c-basic-offset: 4
  87  * c-file-style: "Stroustrup"
  88  * indent-tabs-mode: nil
  89  * End:
  90  * vim: shiftwidth=4 tabstop=8 expandtab
  91  */
  92