Added skeleton for query charset conversion. Bug #977.

[yaz-moved-to-github.git] / src / query-charset.c

diff --git a/src/query-charset.c b/src/query-charset.c
new file mode 100644 (file)
index 0000000..2001315
--- /dev/null
+++ b/src/query-charset.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 1995-2007, Index Data ApS
+ * All rights reserved.
+ *
+ * $Id: query-charset.c,v 1.1 2007-03-21 19:47:28 adam Exp $
+ */
+
+/** \file query-charset.c
+    \brief converts General Terms in RPN queries
+ */
+
+#include <stdio.h>
+#include <assert.h>
+
+#include <yaz/proto.h>
+#include <yaz/wrbuf.h>
+#include <yaz/odr.h>
+#include <yaz/yaz-iconv.h>
+
+void yaz_query_charset_convert_buf(char *buf_in, int len_in,
+                                   char **buf_out, int *len_out,
+                                   ODR o, WRBUF wrbuf, yaz_iconv_t cd)
+{
+    wrbuf_rewind(wrbuf);
+    wrbuf_iconv_write(wrbuf, cd, buf_in, len_in);
+    wrbuf_iconv_reset(wrbuf, cd);
+
+    *len_out = wrbuf_len(wrbuf);
+    if (*len_out == 0)
+    {   // we assume conversion failed
+        *buf_out = buf_in;
+        *len_out = len_in;
+    }
+    else
+    {
+        *buf_out = (char*) odr_malloc(o, *len_out);
+        memcpy(*buf_out, wrbuf_buf(wrbuf), *len_out);
+    }
+}
+
+void yaz_query_charset_convert_term(Z_Term *q,
+                                    ODR o, WRBUF wrbuf, yaz_iconv_t cd)
+{
+    switch(q->which)
+    {
+    case Z_Term_general:
+        yaz_query_charset_convert_buf(
+            (char *) q->u.general->buf, q->u.general->len,
+            (char **) &q->u.general->buf, &q->u.general->len, o, wrbuf, cd);
+        break;
+    }
+}
+
+void yaz_query_charset_convert_operand(Z_Operand *q,
+                                       ODR o, WRBUF wrbuf, yaz_iconv_t cd)
+{
+    switch(q->which)
+    {
+    case Z_Operand_APT:
+        yaz_query_charset_convert_term(q->u.attributesPlusTerm->term,
+                                       o, wrbuf, cd);
+        break;
+    case Z_Operand_resultSetId:
+        break;
+    case Z_Operand_resultAttr:
+        break;
+    }
+}
+
+void yaz_query_charset_convert_structure(Z_RPNStructure *q,
+                                         ODR o, WRBUF wrbuf, yaz_iconv_t cd)
+{
+    switch(q->which)
+    {
+    case Z_RPNStructure_simple:
+        yaz_query_charset_convert_operand(q->u.simple, o, wrbuf, cd);
+        break;
+    case Z_RPNStructure_complex:
+        yaz_query_charset_convert_structure(q->u.complex->s1, o, wrbuf, cd);
+        yaz_query_charset_convert_structure(q->u.complex->s2, o, wrbuf, cd);
+        break;
+    }
+}
+
+void yaz_query_charset_convert_rpnquery(Z_RPNQuery *q,
+                                        ODR o, yaz_iconv_t cd)
+{
+    WRBUF wrbuf = wrbuf_alloc();
+    yaz_query_charset_convert_structure(q->RPNStructure, o, wrbuf, cd);
+    wrbuf_destroy(wrbuf);
+}
+
+void yaz_query_charset_convert_apt(Z_AttributesPlusTerm *apt,
+                                   ODR o, yaz_iconv_t cd)
+{
+    WRBUF wrbuf = wrbuf_alloc();
+    yaz_query_charset_convert_term(apt->term, o, wrbuf, cd);
+    wrbuf_destroy(wrbuf);
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+