--- /dev/null
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2010 Index Data.
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Index Data nor the names of its contributors
+ * may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file stemming.h
+ * \brief Header for the stemming API. Simple wrapper to hide underlying implementation.
+ */
+
+#ifndef YAZ_STEMMER_H
+#define YAZ_STEMMER_H
+
+#include <yaz/yconfig.h>
++#include <yaz/xmltypes.h>
+#include <yaz/icu_I18N.h>
+#include <yaz/log.h>
+
+#include <unicode/ustring.h> /* some more string fcns*/
+#include <unicode/uchar.h> /* char names */
+
+
+YAZ_BEGIN_CDECL
+
+typedef struct yaz_stemmer_t *yaz_stemmer_p;
+
+YAZ_EXPORT
+yaz_stemmer_p yaz_stemmer_create(const char *locale, const char *rule, UErrorCode *status);
+
+YAZ_EXPORT
+yaz_stemmer_p yaz_stemmer_clone(yaz_stemmer_p stemmer);
+
+YAZ_EXPORT
+void yaz_stemmer_stem(yaz_stemmer_p stemmer, struct icu_buf_utf16 *dst, struct icu_buf_utf16* src, UErrorCode *status);
+
+YAZ_EXPORT
+void yaz_stemmer_destroy(yaz_stemmer_p stemmer);
+
+#endif
#include <yaz/icu_I18N.h>
+#include <yaz/stemmer.h>
+
#include <yaz/log.h>
-
+ #include <yaz/nmem.h>
+ #include <yaz/nmem_xml.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
enum icu_chain_step_type {
ICU_chain_step_type_none,
- ICU_chain_step_type_display, /* convert to utf8 display format */
- ICU_chain_step_type_casemap, /* apply utf16 charmap */
- ICU_chain_step_type_transform, /* apply utf16 transform */
- ICU_chain_step_type_tokenize, /* apply utf16 tokenization */
- ICU_chain_step_type_transliterate /* apply utf16 tokenization */
+ ICU_chain_step_type_display, /* convert to utf8 display format */
+ ICU_chain_step_type_casemap, /* apply utf16 charmap */
+ ICU_chain_step_type_transform, /* apply utf16 transform */
+ ICU_chain_step_type_tokenize, /* apply utf16 tokenization */
+ ICU_chain_step_type_transliterate, /* apply utf16 tokenization */
+ YAZ_chain_step_type_stemming /* apply utf16 stemming (YAZ) */
};
struct icu_chain_step
/* type and action object */
enum icu_chain_step_type type;
union {
- struct icu_casemap * casemap;
- struct icu_transform * transform;
- struct icu_tokenizer * tokenizer;
- yaz_stemmer_p stemmer;
- struct icu_casemap *casemap;
++ struct icu_casemap *casemap;
+ struct icu_transform *transform;
+ struct icu_tokenizer *tokenizer;
++ yaz_stemmer_p stemmer;
} u;
- struct icu_chain_step * previous;
+ struct icu_chain_step *previous;
};
struct icu_chain
char *locale;
int sort;
- UCollator * coll;
+ UCollator *coll;
/* linked list of chain steps */
- struct icu_chain_step * csteps;
+ struct icu_chain_step *csteps;
};
int icu_check_status(UErrorCode status)
return 1;
}
- static struct icu_chain_step *icu_chain_step_create(
- struct icu_chain * chain, enum icu_chain_step_type type,
- const uint8_t * rule,
- UErrorCode *status)
+ static struct icu_chain_step *icu_chain_insert_step(
+ struct icu_chain *chain, enum icu_chain_step_type type,
+ const uint8_t *rule, UErrorCode *status)
{
- struct icu_chain_step * step = 0;
+ struct icu_chain_step *step = 0;
if (!chain || !type || !rule)
return 0;
step->u.transform = icu_transform_create("custom", 'f',
(const char *) rule, status);
break;
+ case YAZ_chain_step_type_stemming:
+ step->u.stemmer = yaz_stemmer_create((char *) chain->locale, (const char *) rule, status);
+ break;
default:
break;
}
+ step->previous = chain->csteps;
+ chain->csteps = step;
+
return step;
}
- static void icu_chain_step_destroy(struct icu_chain_step * step)
+ static void icu_chain_step_destroy(struct icu_chain_step *step)
{
if (!step)
return;
case ICU_chain_step_type_tokenize:
icu_tokenizer_destroy(step->u.tokenizer);
break;
+ case YAZ_chain_step_type_stemming:
+ yaz_stemmer_destroy(step->u.stemmer);
+ break;
default:
break;
}
case ICU_chain_step_type_tokenize:
(*sp)->u.tokenizer = icu_tokenizer_clone(old->u.tokenizer);
break;
+ case YAZ_chain_step_type_stemming:
+ yaz_stemmer_clone(step->u.stemmer);
+ break;
case ICU_chain_step_type_none:
break;
}
}
struct icu_chain *icu_chain_create(const char *locale, int sort,
- UErrorCode * status)
+ UErrorCode *status)
{
- struct icu_chain * chain
+ struct icu_chain *chain
= (struct icu_chain *) xmalloc(sizeof(*chain));
*status = U_ZERO_ERROR;
return chain;
}
- void icu_chain_destroy(struct icu_chain * chain)
+ void icu_chain_destroy(struct icu_chain *chain)
{
if (chain)
{
}
static struct icu_chain_step *icu_chain_insert_step(
- struct icu_chain * chain, enum icu_chain_step_type type,
- const uint8_t * rule, UErrorCode *status);
+ struct icu_chain *chain, enum icu_chain_step_type type,
+ const uint8_t *rule, UErrorCode *status);
- struct icu_chain * icu_chain_xml_config(const xmlNode *xml_node,
- int sort,
- UErrorCode * status)
+ struct icu_chain *icu_chain_xml_config(const xmlNode *xml_node,
+ int sort,
+ UErrorCode *status)
{
xmlNode *node = 0;
- struct icu_chain * chain = 0;
+ int no_errors = 0;
+ struct icu_chain *chain = 0;
+ NMEM nmem = 0;
*status = U_ZERO_ERROR;
return 0;
{
- xmlChar * xml_locale = xmlGetProp((xmlNode *) xml_node,
- (xmlChar *) "locale");
+ xmlChar *xml_locale = xmlGetProp((xmlNode *) xml_node,
+ (xmlChar *) "locale");
if (xml_locale)
{
if (!chain)
return 0;
+ nmem = nmem_create();
for (node = xml_node->children; node; node = node->next)
{
- xmlChar *xml_rule;
- struct icu_chain_step * step = 0;
+ char *rule = 0;
+ struct icu_chain_step *step = 0;
+ struct _xmlAttr *attr;
+ nmem_reset(nmem);
if (node->type != XML_ELEMENT_NODE)
continue;
- xml_rule = xmlGetProp(node, (xmlChar *) "rule");
-
+ for (attr = node->properties; attr; attr = attr->next)
+ {
+ if (!strcmp((const char *) attr->name, "rule"))
+ {
+ rule = nmem_text_node_cdata(attr->children, nmem);
+ }
+ else
+ {
+ yaz_log(YLOG_WARN, "Unsupported attribute '%s' for "
+ "element '%s'", attr->name, node->name);
+ no_errors++;
+ continue;
+ }
+ }
+ if (!rule && node->children)
+ rule = nmem_text_node_cdata(node->children, nmem);
+
if (!strcmp((const char *) node->name, "casemap"))
step = icu_chain_insert_step(chain, ICU_chain_step_type_casemap,
- (const uint8_t *) xml_rule, status);
+ (const uint8_t *) rule, status);
else if (!strcmp((const char *) node->name, "transform"))
step = icu_chain_insert_step(chain, ICU_chain_step_type_transform,
- (const uint8_t *) xml_rule, status);
+ (const uint8_t *) rule, status);
else if (!strcmp((const char *) node->name, "transliterate"))
step = icu_chain_insert_step(chain, ICU_chain_step_type_transliterate,
- (const uint8_t *) xml_rule, status);
+ (const uint8_t *) rule, status);
else if (!strcmp((const char *) node->name, "tokenize"))
step = icu_chain_insert_step(chain, ICU_chain_step_type_tokenize,
- (const uint8_t *) xml_rule, status);
+ (const uint8_t *) rule, status);
else if (!strcmp((const char *) node->name, "display"))
step = icu_chain_insert_step(chain, ICU_chain_step_type_display,
(const uint8_t *) "", status);
+ else if (!strcmp((const char *) node->name, "stemming"))
- step = yaz_chain_insert_step(chain, YAZ_chain_step_type_stemming,
- (const uint8_t *) xml_rule, status);
++ step = icu_chain_insert_step(chain, YAZ_chain_step_type_stemming,
++ (const uint8_t *) rule, status);
else if (!strcmp((const char *) node->name, "normalize"))
{
yaz_log(YLOG_WARN, "Element %s is deprecated. "
"Use transform instead", node->name);
step = icu_chain_insert_step(chain, ICU_chain_step_type_transform,
- (const uint8_t *) xml_rule, status);
+ (const uint8_t *) rule, status);
}
else if (!strcmp((const char *) node->name, "index")
|| !strcmp((const char *) node->name, "sortkey"))
else
{
yaz_log(YLOG_WARN, "Unknown element %s", node->name);
- icu_chain_destroy(chain);
- return 0;
+ no_errors++;
+ continue;
}
- xmlFree(xml_rule);
if (step && U_FAILURE(*status))
{
- icu_chain_destroy(chain);
- return 0;
+ no_errors++;
+ break;
}
}
- return chain;
- }
-
-
- static struct icu_chain_step *icu_chain_insert_step(
- struct icu_chain * chain, enum icu_chain_step_type type,
- const uint8_t * rule, UErrorCode *status)
- {
- struct icu_chain_step * step = 0;
- if (!chain || !type || !rule)
+ nmem_destroy(nmem);
+ if (no_errors)
+ {
+ icu_chain_destroy(chain);
return 0;
-
- /* create actual chain step with this buffer */
- step = icu_chain_step_create(chain, type, rule,
- status);
-
- step->previous = chain->csteps;
- chain->csteps = step;
-
- return step;
+ }
+ return chain;
}
struct icu_iter {
if (dst)
icu_utf16_to_utf8(iter->display, dst, &iter->status);
break;
+ case YAZ_chain_step_type_stemming:
+ if (dst)
+ {
+ struct icu_buf_utf16 *src = dst;
+ dst = icu_buf_utf16_create(0);
+ yaz_stemmer_stem(step->u.stemmer, dst, src, &iter->status);
+ icu_buf_utf16_destroy(src);
+ }
+ break;
default:
assert(0);
}
return iter->token_count;
}
- int icu_chain_assign_cstr(struct icu_chain * chain, const char * src8cstr,
+ int icu_chain_assign_cstr(struct icu_chain *chain, const char *src8cstr,
UErrorCode *status)
{
if (chain->iter)
return 1;
}
- int icu_chain_next_token(struct icu_chain * chain, UErrorCode *status)
+ int icu_chain_next_token(struct icu_chain *chain, UErrorCode *status)
{
*status = U_ZERO_ERROR;
return icu_iter_next(chain->iter);
}
- int icu_chain_token_number(struct icu_chain * chain)
+ int icu_chain_token_number(struct icu_chain *chain)
{
if (chain && chain->iter)
return chain->iter->token_count;
return 0;
}
- const char * icu_chain_token_display(struct icu_chain * chain)
+ const char *icu_chain_token_display(struct icu_chain *chain)
{
if (chain->iter)
return icu_iter_get_display(chain->iter);
return 0;
}
- const char * icu_chain_token_norm(struct icu_chain * chain)
+ const char *icu_chain_token_norm(struct icu_chain *chain)
{
if (chain->iter)
return icu_iter_get_norm(chain->iter);
return 0;
}
- const char * icu_chain_token_sortkey(struct icu_chain * chain)
+ const char *icu_chain_token_sortkey(struct icu_chain *chain)
{
if (chain->iter)
return icu_iter_get_sortkey(chain->iter);
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