src/query-charset.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * All rights reserved.
   4  *
   5  * $Id: query-charset.c,v 1.1 2007-03-21 19:47:28 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/proto.h>
  16 #include <yaz/wrbuf.h>
  17 #include <yaz/odr.h>
  18 #include <yaz/yaz-iconv.h>
  19
  20 void yaz_query_charset_convert_buf(char *buf_in, int len_in,
  21                                    char **buf_out, int *len_out,
  22                                    ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  23 {
  24     wrbuf_rewind(wrbuf);
  25     wrbuf_iconv_write(wrbuf, cd, buf_in, len_in);
  26     wrbuf_iconv_reset(wrbuf, cd);
  27
  28     *len_out = wrbuf_len(wrbuf);
  29     if (*len_out == 0)
  30     {   // we assume conversion failed
  31         *buf_out = buf_in;
  32         *len_out = len_in;
  33     }
  34     else
  35     {
  36         *buf_out = (char*) odr_malloc(o, *len_out);
  37         memcpy(*buf_out, wrbuf_buf(wrbuf), *len_out);
  38     }
  39 }
  40
  41 void yaz_query_charset_convert_term(Z_Term *q,
  42                                     ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  43 {
  44     switch(q->which)
  45     {
  46     case Z_Term_general:
  47         yaz_query_charset_convert_buf(
  48             (char *) q->u.general->buf, q->u.general->len,
  49             (char **) &q->u.general->buf, &q->u.general->len, o, wrbuf, cd);
  50         break;
  51     }
  52 }
  53
  54 void yaz_query_charset_convert_operand(Z_Operand *q,
  55                                        ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  56 {
  57     switch(q->which)
  58     {
  59     case Z_Operand_APT:
  60         yaz_query_charset_convert_term(q->u.attributesPlusTerm->term,
  61                                        o, wrbuf, cd);
  62         break;
  63     case Z_Operand_resultSetId:
  64         break;
  65     case Z_Operand_resultAttr:
  66         break;
  67     }
  68 }
  69
  70 void yaz_query_charset_convert_structure(Z_RPNStructure *q,
  71                                          ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  72 {
  73     switch(q->which)
  74     {
  75     case Z_RPNStructure_simple:
  76         yaz_query_charset_convert_operand(q->u.simple, o, wrbuf, cd);
  77         break;
  78     case Z_RPNStructure_complex:
  79         yaz_query_charset_convert_structure(q->u.complex->s1, o, wrbuf, cd);
  80         yaz_query_charset_convert_structure(q->u.complex->s2, o, wrbuf, cd);
  81         break;
  82     }
  83 }
  84
  85 void yaz_query_charset_convert_rpnquery(Z_RPNQuery *q,
  86                                         ODR o, yaz_iconv_t cd)
  87 {
  88     WRBUF wrbuf = wrbuf_alloc();
  89     yaz_query_charset_convert_structure(q->RPNStructure, o, wrbuf, cd);
  90     wrbuf_destroy(wrbuf);
  91 }
  92
  93 void yaz_query_charset_convert_apt(Z_AttributesPlusTerm *apt,
  94                                    ODR o, yaz_iconv_t cd)
  95 {
  96     WRBUF wrbuf = wrbuf_alloc();
  97     yaz_query_charset_convert_term(apt->term, o, wrbuf, cd);
  98     wrbuf_destroy(wrbuf);
  99 }
 100
 101 /*
 102  * Local variables:
 103  * c-basic-offset: 4
 104  * indent-tabs-mode: nil
 105  * End:
 106  * vim: shiftwidth=4 tabstop=8 expandtab
 107  */
 108