src/query-charset.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * All rights reserved.
   4  *
   5  * $Id: query-charset.c,v 1.2 2007-04-10 14:42:31 adam Exp $
   6  */
   7
   8 /** \file query-charset.c
   9     \brief converts General Terms in RPN queries
  10  */
  11
  12 #include <stdio.h>
  13 #include <assert.h>
  14
  15 #include <yaz/query-charset.h>
  16 #include <yaz/wrbuf.h>
  17
  18 void yaz_query_charset_convert_buf(char *buf_in, int len_in,
  19                                    char **buf_out, int *len_out,
  20                                    ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  21 {
  22     wrbuf_rewind(wrbuf);
  23     wrbuf_iconv_write(wrbuf, cd, buf_in, len_in);
  24     wrbuf_iconv_reset(wrbuf, cd);
  25
  26     *len_out = wrbuf_len(wrbuf);
  27     if (*len_out == 0)
  28     {   // we assume conversion failed
  29         *buf_out = buf_in;
  30         *len_out = len_in;
  31     }
  32     else
  33     {
  34         *buf_out = (char*) odr_malloc(o, *len_out);
  35         memcpy(*buf_out, wrbuf_buf(wrbuf), *len_out);
  36     }
  37 }
  38
  39 void yaz_query_charset_convert_term(Z_Term *q,
  40                                     ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  41 {
  42     switch(q->which)
  43     {
  44     case Z_Term_general:
  45         yaz_query_charset_convert_buf(
  46             (char *) q->u.general->buf, q->u.general->len,
  47             (char **) &q->u.general->buf, &q->u.general->len, o, wrbuf, cd);
  48         break;
  49     }
  50 }
  51
  52 void yaz_query_charset_convert_operand(Z_Operand *q,
  53                                        ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  54 {
  55     switch(q->which)
  56     {
  57     case Z_Operand_APT:
  58         yaz_query_charset_convert_term(q->u.attributesPlusTerm->term,
  59                                        o, wrbuf, cd);
  60         break;
  61     case Z_Operand_resultSetId:
  62         break;
  63     case Z_Operand_resultAttr:
  64         break;
  65     }
  66 }
  67
  68 void yaz_query_charset_convert_structure(Z_RPNStructure *q,
  69                                          ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  70 {
  71     switch(q->which)
  72     {
  73     case Z_RPNStructure_simple:
  74         yaz_query_charset_convert_operand(q->u.simple, o, wrbuf, cd);
  75         break;
  76     case Z_RPNStructure_complex:
  77         yaz_query_charset_convert_structure(q->u.complex->s1, o, wrbuf, cd);
  78         yaz_query_charset_convert_structure(q->u.complex->s2, o, wrbuf, cd);
  79         break;
  80     }
  81 }
  82
  83 void yaz_query_charset_convert_rpnquery(Z_RPNQuery *q,
  84                                         ODR o, yaz_iconv_t cd)
  85 {
  86     WRBUF wrbuf = wrbuf_alloc();
  87     yaz_query_charset_convert_structure(q->RPNStructure, o, wrbuf, cd);
  88     wrbuf_destroy(wrbuf);
  89 }
  90
  91 void yaz_query_charset_convert_apt(Z_AttributesPlusTerm *apt,
  92                                    ODR o, yaz_iconv_t cd)
  93 {
  94     WRBUF wrbuf = wrbuf_alloc();
  95     yaz_query_charset_convert_term(apt->term, o, wrbuf, cd);
  96     wrbuf_destroy(wrbuf);
  97 }
  98
  99 /*
 100  * Local variables:
 101  * c-basic-offset: 4
 102  * indent-tabs-mode: nil
 103  * End:
 104  * vim: shiftwidth=4 tabstop=8 expandtab
 105  */
 106