src/yaz-cql2rpn.cpp

   1 /* This file is part of the yazpp toolkit.
   2  * Copyright (C) Index Data
   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 <yaz/sortspec.h>
  13 #include <yazpp/cql2rpn.h>
  14 #include <yaz/rpn2cql.h>
  15
  16 using namespace yazpp_1;
  17
  18 Yaz_cql2rpn::Yaz_cql2rpn()
  19 {
  20     m_transform = 0;
  21 }
  22
  23 Yaz_cql2rpn::~Yaz_cql2rpn()
  24 {
  25     if (m_transform)
  26         cql_transform_close(m_transform);
  27 }
  28
  29 void Yaz_cql2rpn::set_pqf_file(const char *fname)
  30 {
  31     if (!m_transform)
  32         m_transform = cql_transform_open_fname(fname);
  33 }
  34
  35
  36 bool Yaz_cql2rpn::parse_spec_file(const char *fname, int *error)
  37 {
  38     *error = 0;
  39     cql_transform_close(m_transform);
  40     m_transform = cql_transform_open_fname(fname);
  41     return m_transform ? true : false;
  42 }
  43
  44 int Yaz_cql2rpn::rpn2cql_transform(Z_RPNQuery *q, WRBUF cql, ODR o,
  45                                    char **addinfop)
  46 {
  47     int r = cql_transform_rpn2cql_wrbuf(m_transform, cql, q);
  48     *addinfop = 0;
  49     if (r)
  50     {
  51         const char *addinfo = 0;
  52         r = cql_transform_error(m_transform, &addinfo);
  53         *addinfop = odr_strdup_null(o, addinfo);
  54     }
  55     return r;
  56 }
  57
  58 int Yaz_cql2rpn::query_transform(const char *cql_query,
  59                                  Z_RPNQuery **rpnquery, ODR o,
  60                                  char **addinfop)
  61 {
  62     const char *addinfo = 0;
  63     if (!m_transform)
  64         return -3;
  65     CQL_parser cp = cql_parser_create();
  66
  67     int r = cql_parser_string(cp, cql_query);
  68     if (r)
  69     {
  70         r = YAZ_SRW_QUERY_SYNTAX_ERROR;
  71     }
  72     else
  73     {
  74         WRBUF pqf = wrbuf_alloc();
  75         r = cql_transform(m_transform, cql_parser_result(cp),
  76                           wrbuf_vp_puts, pqf);
  77         if (!r)
  78         {
  79             WRBUF sortkeys = wrbuf_alloc();
  80             WRBUF sortspec = wrbuf_alloc();
  81             if (cql_sortby_to_sortkeys(cql_parser_result(cp),
  82                                        wrbuf_vp_puts, sortkeys))
  83             {
  84                 r = YAZ_SRW_UNSUPP_SORT_TYPE;
  85             }
  86             else
  87             {
  88                 yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sortkeys), sortspec);
  89                 Z_SortKeySpecList *sksl =
  90                     yaz_sort_spec(o, wrbuf_cstr(sortspec));
  91                 if (sksl)
  92                     yaz_sort_spec_to_type7(sksl, pqf);
  93             }
  94             wrbuf_destroy(sortspec);
  95             wrbuf_destroy(sortkeys);
  96
  97             YAZ_PQF_Parser pp = yaz_pqf_create();
  98
  99             *rpnquery = yaz_pqf_parse(pp, o, wrbuf_cstr(pqf));
 100             if (!*rpnquery)
 101             {
 102                 size_t off;
 103                 const char *pqf_msg;
 104                 yaz_pqf_error(pp, &pqf_msg, &off);
 105                 r = -1;
 106             }
 107             yaz_pqf_destroy(pp);
 108         }
 109         else
 110         {
 111             r = cql_transform_error(m_transform, &addinfo);
 112         }
 113         wrbuf_destroy(pqf);
 114     }
 115     cql_parser_destroy(cp);
 116     *addinfop = odr_strdup_null(o, addinfo);
 117     return r;
 118 }
 119 /*
 120  * Local variables:
 121  * c-basic-offset: 4
 122  * c-file-style: "Stroustrup"
 123  * indent-tabs-mode: nil
 124  * End:
 125  * vim: shiftwidth=4 tabstop=8 expandtab
 126  */
 127