src/query-charset.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2008 Index Data
   3  * See the file LICENSE for details.
   4  */
   5
   6 /** \file query-charset.c
   7     \brief converts General Terms in RPN queries
   8  */
   9
  10 #include <stdio.h>
  11 #include <assert.h>
  12
  13 #include <yaz/query-charset.h>
  14 #include <yaz/wrbuf.h>
  15
  16 void yaz_query_charset_convert_buf(char *buf_in, int len_in,
  17                                    char **buf_out, int *len_out,
  18                                    ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  19 {
  20     wrbuf_rewind(wrbuf);
  21     wrbuf_iconv_write(wrbuf, cd, buf_in, len_in);
  22     wrbuf_iconv_reset(wrbuf, cd);
  23
  24     *len_out = wrbuf_len(wrbuf);
  25     if (*len_out == 0)
  26     {   /* we assume conversion failed */
  27         *buf_out = buf_in;
  28         *len_out = len_in;
  29     }
  30     else
  31     {
  32         *buf_out = (char*) odr_malloc(o, *len_out);
  33         memcpy(*buf_out, wrbuf_buf(wrbuf), *len_out);
  34     }
  35 }
  36
  37 void yaz_query_charset_convert_term(Z_Term *q,
  38                                     ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  39 {
  40     switch(q->which)
  41     {
  42     case Z_Term_general:
  43         yaz_query_charset_convert_buf(
  44             (char *) q->u.general->buf, q->u.general->len,
  45             (char **) &q->u.general->buf, &q->u.general->len, o, wrbuf, cd);
  46         break;
  47     }
  48 }
  49
  50 void yaz_query_charset_convert_operand(Z_Operand *q,
  51                                        ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  52 {
  53     switch(q->which)
  54     {
  55     case Z_Operand_APT:
  56         yaz_query_charset_convert_term(q->u.attributesPlusTerm->term,
  57                                        o, wrbuf, cd);
  58         break;
  59     case Z_Operand_resultSetId:
  60         break;
  61     case Z_Operand_resultAttr:
  62         break;
  63     }
  64 }
  65
  66 void yaz_query_charset_convert_structure(Z_RPNStructure *q,
  67                                          ODR o, WRBUF wrbuf, yaz_iconv_t cd)
  68 {
  69     switch(q->which)
  70     {
  71     case Z_RPNStructure_simple:
  72         yaz_query_charset_convert_operand(q->u.simple, o, wrbuf, cd);
  73         break;
  74     case Z_RPNStructure_complex:
  75         yaz_query_charset_convert_structure(q->u.complex->s1, o, wrbuf, cd);
  76         yaz_query_charset_convert_structure(q->u.complex->s2, o, wrbuf, cd);
  77         break;
  78     }
  79 }
  80
  81 void yaz_query_charset_convert_rpnquery(Z_RPNQuery *q,
  82                                         ODR o, yaz_iconv_t cd)
  83 {
  84     WRBUF wrbuf = wrbuf_alloc();
  85     yaz_query_charset_convert_structure(q->RPNStructure, o, wrbuf, cd);
  86     wrbuf_destroy(wrbuf);
  87 }
  88
  89 void yaz_query_charset_convert_apt(Z_AttributesPlusTerm *apt,
  90                                    ODR o, yaz_iconv_t cd)
  91 {
  92     WRBUF wrbuf = wrbuf_alloc();
  93     yaz_query_charset_convert_term(apt->term, o, wrbuf, cd);
  94     wrbuf_destroy(wrbuf);
  95 }
  96
  97 /*
  98  * Local variables:
  99  * c-basic-offset: 4
 100  * indent-tabs-mode: nil
 101  * End:
 102  * vim: shiftwidth=4 tabstop=8 expandtab
 103  */
 104