+++ /dev/null
-/* This file is part of the YAZ toolkit.
- * Copyright (C) 1995-2009 Index Data
- * See the file LICENSE for details.
- */
-
-/**
- * \file icu_I18N.c
- * \brief ICU utilities
- */
-
-#if HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#define USE_TIMING 0
-#if USE_TIMING
-#include <yaz/timing.h>
-#endif
-
-#if YAZ_HAVE_ICU
-#include <yaz/xmalloc.h>
-
-#include <yaz/icu_I18N.h>
-
-#include <yaz/log.h>
-
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include <unicode/ustring.h> /* some more string fcns*/
-#include <unicode/uchar.h> /* char names */
-#include <unicode/ucol.h>
-
-int icu_check_status(UErrorCode status)
-{
- if (U_FAILURE(status))
- {
- yaz_log(YLOG_WARN, "ICU: %d %s\n", status, u_errorName(status));
- return 0;
- }
- return 1;
-}
-
-struct icu_buf_utf16 * icu_buf_utf16_create(size_t capacity)
-{
- struct icu_buf_utf16 * buf16
- = (struct icu_buf_utf16 *) xmalloc(sizeof(struct icu_buf_utf16));
-
- buf16->utf16 = 0;
- buf16->utf16_len = 0;
- buf16->utf16_cap = 0;
-
- if (capacity > 0)
- {
- buf16->utf16 = (UChar *) xmalloc(sizeof(UChar) * capacity);
- buf16->utf16[0] = (UChar) 0;
- buf16->utf16_cap = capacity;
- }
- return buf16;
-}
-
-struct icu_buf_utf16 * icu_buf_utf16_clear(struct icu_buf_utf16 * buf16)
-{
- if (buf16)
- {
- if (buf16->utf16)
- buf16->utf16[0] = (UChar) 0;
- buf16->utf16_len = 0;
- }
- return buf16;
-}
-
-struct icu_buf_utf16 * icu_buf_utf16_resize(struct icu_buf_utf16 * buf16,
- size_t capacity)
-{
- if (!buf16)
- return 0;
-
- if (capacity > 0)
- {
- if (0 == buf16->utf16)
- buf16->utf16 = (UChar *) xmalloc(sizeof(UChar) * capacity);
- else
- buf16->utf16
- = (UChar *) xrealloc(buf16->utf16, sizeof(UChar) * capacity);
-
- icu_buf_utf16_clear(buf16);
- buf16->utf16_cap = capacity;
- }
- else
- {
- xfree(buf16->utf16);
- buf16->utf16 = 0;
- buf16->utf16_len = 0;
- buf16->utf16_cap = 0;
- }
-
- return buf16;
-}
-
-
-struct icu_buf_utf16 * icu_buf_utf16_copy(struct icu_buf_utf16 * dest16,
- struct icu_buf_utf16 * src16)
-{
- if (!dest16 || !src16 || dest16 == src16)
- return 0;
-
- if (dest16->utf16_cap < src16->utf16_len)
- icu_buf_utf16_resize(dest16, src16->utf16_len * 2);
-
- u_strncpy(dest16->utf16, src16->utf16, src16->utf16_len);
- dest16->utf16_len = src16->utf16_len;
-
- return dest16;
-}
-
-void icu_buf_utf16_destroy(struct icu_buf_utf16 * buf16)
-{
- if (buf16)
- xfree(buf16->utf16);
- xfree(buf16);
-}
-
-struct icu_buf_utf8 * icu_buf_utf8_create(size_t capacity)
-{
- struct icu_buf_utf8 * buf8
- = (struct icu_buf_utf8 *) xmalloc(sizeof(struct icu_buf_utf8));
-
- buf8->utf8 = 0;
- buf8->utf8_len = 0;
- buf8->utf8_cap = 0;
-
- if (capacity > 0)
- {
- buf8->utf8 = (uint8_t *) xmalloc(sizeof(uint8_t) * capacity);
- buf8->utf8[0] = (uint8_t) 0;
- buf8->utf8_cap = capacity;
- }
- return buf8;
-}
-
-struct icu_buf_utf8 * icu_buf_utf8_clear(struct icu_buf_utf8 * buf8)
-{
- if (buf8)
- {
- if (buf8->utf8)
- buf8->utf8[0] = (uint8_t) 0;
- buf8->utf8_len = 0;
- }
- return buf8;
-}
-
-struct icu_buf_utf8 * icu_buf_utf8_resize(struct icu_buf_utf8 * buf8,
- size_t capacity)
-{
- if (!buf8)
- return 0;
-
- if (capacity > 0){
- if (0 == buf8->utf8)
- buf8->utf8 = (uint8_t *) xmalloc(sizeof(uint8_t) * capacity);
- else
- buf8->utf8
- = (uint8_t *) xrealloc(buf8->utf8, sizeof(uint8_t) * capacity);
-
- buf8->utf8_cap = capacity;
- }
- else {
- xfree(buf8->utf8);
- buf8->utf8 = 0;
- buf8->utf8_len = 0;
- buf8->utf8_cap = 0;
- }
-
- return buf8;
-}
-
-const char *icu_buf_utf8_to_cstr(struct icu_buf_utf8 *src8)
-{
- if (!src8 || src8->utf8_len == 0)
- return "";
-
- if (src8->utf8_len == src8->utf8_cap)
- src8 = icu_buf_utf8_resize(src8, src8->utf8_len * 2 + 1);
-
- src8->utf8[src8->utf8_len] = '\0';
-
- return (const char *) src8->utf8;
-}
-
-void icu_buf_utf8_destroy(struct icu_buf_utf8 * buf8)
-{
- if (buf8)
- xfree(buf8->utf8);
- xfree(buf8);
-}
-
-UErrorCode icu_utf16_from_utf8_cstr(struct icu_buf_utf16 * dest16,
- const char * src8cstr,
- UErrorCode * status)
-{
- size_t src8cstr_len = 0;
- int32_t utf16_len = 0;
-
- *status = U_ZERO_ERROR;
- src8cstr_len = strlen(src8cstr);
-
- u_strFromUTF8(dest16->utf16, dest16->utf16_cap,
- &utf16_len,
- src8cstr, src8cstr_len, status);
-
- /* check for buffer overflow, resize and retry */
- if (*status == U_BUFFER_OVERFLOW_ERROR)
- {
- icu_buf_utf16_resize(dest16, utf16_len * 2);
- *status = U_ZERO_ERROR;
- u_strFromUTF8(dest16->utf16, dest16->utf16_cap,
- &utf16_len,
- src8cstr, src8cstr_len, status);
- }
-
- if (U_SUCCESS(*status)
- && utf16_len <= dest16->utf16_cap)
- dest16->utf16_len = utf16_len;
- else
- icu_buf_utf16_clear(dest16);
-
- return *status;
-}
-
-UErrorCode icu_utf16_to_utf8(struct icu_buf_utf8 * dest8,
- struct icu_buf_utf16 * src16,
- UErrorCode * status)
-{
- int32_t utf8_len = 0;
-
- u_strToUTF8((char *) dest8->utf8, dest8->utf8_cap,
- &utf8_len,
- src16->utf16, src16->utf16_len, status);
-
- /* check for buffer overflow, resize and retry */
- if (*status == U_BUFFER_OVERFLOW_ERROR)
- {
- icu_buf_utf8_resize(dest8, utf8_len * 2);
- *status = U_ZERO_ERROR;
- u_strToUTF8((char *) dest8->utf8, dest8->utf8_cap,
- &utf8_len,
- src16->utf16, src16->utf16_len, status);
- }
-
- if (U_SUCCESS(*status)
- && utf8_len <= dest8->utf8_cap)
- dest8->utf8_len = utf8_len;
- else
- icu_buf_utf8_clear(dest8);
-
- return *status;
-}
-
-
-
-struct icu_casemap * icu_casemap_create(char action, UErrorCode *status)
-{
- struct icu_casemap * casemap
- = (struct icu_casemap *) xmalloc(sizeof(struct icu_casemap));
- casemap->action = action;
-
- switch(casemap->action)
- {
- case 'l':
- case 'L':
- case 'u':
- case 'U':
- case 't':
- case 'T':
- case 'f':
- case 'F':
- break;
- default:
- icu_casemap_destroy(casemap);
- return 0;
- }
- return casemap;
-}
-
-void icu_casemap_destroy(struct icu_casemap * casemap)
-{
- xfree(casemap);
-}
-
-int icu_casemap_casemap(struct icu_casemap * casemap,
- struct icu_buf_utf16 * dest16,
- struct icu_buf_utf16 * src16,
- UErrorCode *status,
- const char *locale)
-{
- if(!casemap)
- return 0;
-
- return icu_utf16_casemap(dest16, src16, locale,
- casemap->action, status);
-}
-
-int icu_utf16_casemap(struct icu_buf_utf16 * dest16,
- struct icu_buf_utf16 * src16,
- const char *locale, char action,
- UErrorCode *status)
-{
- int32_t dest16_len = 0;
-
- if (!src16->utf16_len)
- { /* guarding for empty source string */
- if (dest16->utf16)
- dest16->utf16[0] = (UChar) 0;
- dest16->utf16_len = 0;
- return U_ZERO_ERROR;
- }
-
- switch(action)
- {
- case 'l':
- case 'L':
- dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- locale, status);
- break;
- case 'u':
- case 'U':
- dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- locale, status);
- break;
- case 't':
- case 'T':
- dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- 0, locale, status);
- break;
- case 'f':
- case 'F':
- dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- U_FOLD_CASE_DEFAULT, status);
- break;
-
- default:
- return U_UNSUPPORTED_ERROR;
- break;
- }
-
- /* check for buffer overflow, resize and retry */
- if (*status == U_BUFFER_OVERFLOW_ERROR
- && dest16 != src16 /* do not resize if in-place conversion */
- )
- {
- icu_buf_utf16_resize(dest16, dest16_len * 2);
- *status = U_ZERO_ERROR;
-
- switch(action) {
- case 'l':
- case 'L':
- dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- locale, status);
- break;
- case 'u':
- case 'U':
- dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- locale, status);
- break;
- case 't':
- case 'T':
- dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- 0, locale, status);
- break;
- case 'f':
- case 'F':
- dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
- src16->utf16, src16->utf16_len,
- U_FOLD_CASE_DEFAULT, status);
- break;
-
- default:
- return U_UNSUPPORTED_ERROR;
- break;
- }
- }
-
- if (U_SUCCESS(*status)
- && dest16_len <= dest16->utf16_cap)
- dest16->utf16_len = dest16_len;
- else
- {
- if (dest16->utf16)
- dest16->utf16[0] = (UChar) 0;
- dest16->utf16_len = 0;
- }
-
- return *status;
-}
-
-void icu_sortkey8_from_utf16(UCollator *coll,
- struct icu_buf_utf8 * dest8,
- struct icu_buf_utf16 * src16,
- UErrorCode * status)
-{
- int32_t sortkey_len = 0;
-
- sortkey_len = ucol_getSortKey(coll, src16->utf16, src16->utf16_len,
- dest8->utf8, dest8->utf8_cap);
-
- /* check for buffer overflow, resize and retry */
- if (sortkey_len > dest8->utf8_cap)
- {
- icu_buf_utf8_resize(dest8, sortkey_len * 2);
- sortkey_len = ucol_getSortKey(coll, src16->utf16, src16->utf16_len,
- dest8->utf8, dest8->utf8_cap);
- }
-
- if (U_SUCCESS(*status)
- && sortkey_len > 0)
- dest8->utf8_len = sortkey_len;
- else
- icu_buf_utf8_clear(dest8);
-}
-
-struct icu_tokenizer * icu_tokenizer_create(const char *locale, char action,
- UErrorCode *status)
-{
- struct icu_tokenizer * tokenizer
- = (struct icu_tokenizer *) xmalloc(sizeof(struct icu_tokenizer));
-
- tokenizer->action = action;
- tokenizer->bi = 0;
- tokenizer->buf16 = 0;
- tokenizer->token_count = 0;
- tokenizer->token_id = 0;
- tokenizer->token_start = 0;
- tokenizer->token_end = 0;
-
- switch(tokenizer->action)
- {
- case 'l':
- case 'L':
- tokenizer->bi = ubrk_open(UBRK_LINE, locale, 0, 0, status);
- break;
- case 's':
- case 'S':
- tokenizer->bi = ubrk_open(UBRK_SENTENCE, locale, 0, 0, status);
- break;
- case 'w':
- case 'W':
- tokenizer->bi = ubrk_open(UBRK_WORD, locale, 0, 0, status);
- break;
- case 'c':
- case 'C':
- tokenizer->bi = ubrk_open(UBRK_CHARACTER, locale, 0, 0, status);
- break;
- case 't':
- case 'T':
- tokenizer->bi = ubrk_open(UBRK_TITLE, locale, 0, 0, status);
- break;
- default:
- *status = U_UNSUPPORTED_ERROR;
- return 0;
- break;
- }
-
- /* ICU error stuff is a very funny business */
- if (U_SUCCESS(*status))
- return tokenizer;
-
- /* freeing if failed */
- icu_tokenizer_destroy(tokenizer);
- return 0;
-}
-
-void icu_tokenizer_destroy(struct icu_tokenizer * tokenizer)
-{
- if (tokenizer) {
- if (tokenizer->bi)
- ubrk_close(tokenizer->bi);
- xfree(tokenizer);
- }
-}
-
-int icu_tokenizer_attach(struct icu_tokenizer * tokenizer,
- struct icu_buf_utf16 * src16,
- UErrorCode *status)
-{
- if (!tokenizer || !tokenizer->bi || !src16)
- return 0;
-
- tokenizer->buf16 = src16;
- tokenizer->token_count = 0;
- tokenizer->token_id = 0;
- tokenizer->token_start = 0;
- tokenizer->token_end = 0;
-
- ubrk_setText(tokenizer->bi, src16->utf16, src16->utf16_len, status);
-
- if (U_FAILURE(*status))
- return 0;
-
- return 1;
-}
-
-int32_t icu_tokenizer_next_token(struct icu_tokenizer * tokenizer,
- struct icu_buf_utf16 * tkn16,
- UErrorCode *status)
-{
- int32_t tkn_start = 0;
- int32_t tkn_end = 0;
- int32_t tkn_len = 0;
-
- if (!tokenizer || !tokenizer->bi
- || !tokenizer->buf16 || !tokenizer->buf16->utf16_len)
- return 0;
- /*
- never change tokenizer->buf16 and keep always invariant
- 0 <= tokenizer->token_start
- <= tokenizer->token_end
- <= tokenizer->buf16->utf16_len
- returns length of token
- */
-
- if (0 == tokenizer->token_end) /* first call */
- tkn_start = ubrk_first(tokenizer->bi);
- else /* successive calls */
- tkn_start = tokenizer->token_end;
-
- /* get next position */
- tkn_end = ubrk_next(tokenizer->bi);
-
- /* repairing invariant at end of ubrk, which is UBRK_DONE = -1 */
- if (UBRK_DONE == tkn_end)
- tkn_end = tokenizer->buf16->utf16_len;
-
- /* copy out if everything is well */
- if (U_FAILURE(*status))
- return 0;
-
- /* everything OK, now update internal state */
- tkn_len = tkn_end - tkn_start;
-
- if (0 < tkn_len)
- {
- tokenizer->token_count++;
- tokenizer->token_id++;
- } else {
- tokenizer->token_id = 0;
- }
- tokenizer->token_start = tkn_start;
- tokenizer->token_end = tkn_end;
-
- /* copying into token buffer if it exists */
- if (tkn16){
- if (tkn16->utf16_cap < tkn_len)
- icu_buf_utf16_resize(tkn16, (size_t) tkn_len * 2);
-
- u_strncpy(tkn16->utf16, &(tokenizer->buf16->utf16)[tkn_start],
- tkn_len);
-
- tkn16->utf16_len = tkn_len;
- }
-
- return tkn_len;
-}
-
-int32_t icu_tokenizer_token_id(struct icu_tokenizer * tokenizer)
-{
- return tokenizer->token_id;
-}
-
-int32_t icu_tokenizer_token_start(struct icu_tokenizer * tokenizer)
-{
- return tokenizer->token_start;
-}
-
-int32_t icu_tokenizer_token_end(struct icu_tokenizer * tokenizer)
-{
- return tokenizer->token_end;
-}
-
-int32_t icu_tokenizer_token_length(struct icu_tokenizer * tokenizer)
-{
- return (tokenizer->token_end - tokenizer->token_start);
-}
-
-int32_t icu_tokenizer_token_count(struct icu_tokenizer * tokenizer)
-{
- return tokenizer->token_count;
-}
-
-struct icu_transform * icu_transform_create(const char *id, char action,
- const char *rules,
- UErrorCode *status)
-{
- struct icu_buf_utf16 *id16 = icu_buf_utf16_create(0);
- struct icu_buf_utf16 *rules16 = icu_buf_utf16_create(0);
-
- struct icu_transform * transform
- = (struct icu_transform *) xmalloc(sizeof(struct icu_transform));
-
- transform->action = action;
- transform->trans = 0;
-
- if (id)
- icu_utf16_from_utf8_cstr(id16, id, status);
- if (rules)
- icu_utf16_from_utf8_cstr(rules16, rules, status);
-
- switch(transform->action)
- {
- case 'f':
- case 'F':
- transform->trans
- = utrans_openU(id16->utf16,
- id16->utf16_len,
- UTRANS_FORWARD,
- rules16->utf16,
- rules16->utf16_len,
- &transform->parse_error, status);
- break;
- case 'r':
- case 'R':
- transform->trans
- = utrans_openU(id16->utf16,
- id16->utf16_len,
- UTRANS_REVERSE ,
- rules16->utf16,
- rules16->utf16_len,
- &transform->parse_error, status);
- break;
- default:
- *status = U_UNSUPPORTED_ERROR;
- break;
- }
- icu_buf_utf16_destroy(rules16);
- icu_buf_utf16_destroy(id16);
-
- if (U_SUCCESS(*status))
- return transform;
-
- /* freeing if failed */
- icu_transform_destroy(transform);
- return 0;
-}
-
-void icu_transform_destroy(struct icu_transform * transform)
-{
- if (transform)
- {
- if (transform->trans)
- utrans_close(transform->trans);
- xfree(transform);
- }
-}
-
-int icu_transform_trans(struct icu_transform * transform,
- struct icu_buf_utf16 * dest16,
- struct icu_buf_utf16 * src16,
- UErrorCode *status)
-{
- if (!transform || !transform->trans
- || !src16 || !dest16)
- return 0;
-
- if (!src16->utf16_len)
- { /* guarding for empty source string */
- icu_buf_utf16_clear(dest16);
- return 0;
- }
-
- if (!icu_buf_utf16_copy(dest16, src16))
- return 0;
-
- utrans_transUChars (transform->trans,
- dest16->utf16, &(dest16->utf16_len),
- dest16->utf16_cap,
- 0, &(src16->utf16_len), status);
-
- if (U_FAILURE(*status))
- icu_buf_utf16_clear(dest16);
-
- return dest16->utf16_len;
-}
-
-struct icu_chain_step * icu_chain_step_create(struct icu_chain * chain,
- enum icu_chain_step_type type,
- const uint8_t * rule,
- struct icu_buf_utf16 * buf16,
- UErrorCode *status)
-{
- struct icu_chain_step * step = 0;
-
- if(!chain || !type || !rule)
- return 0;
-
- step = (struct icu_chain_step *) xmalloc(sizeof(struct icu_chain_step));
-
- step->type = type;
-
- step->buf16 = buf16;
-
- /* create auxilary objects */
- switch(step->type)
- {
- case ICU_chain_step_type_display:
- break;
- case ICU_chain_step_type_casemap:
- step->u.casemap = icu_casemap_create(rule[0], status);
- break;
- case ICU_chain_step_type_transform:
- /* rule omitted. Only ID used */
- step->u.transform = icu_transform_create((const char *) rule, 'f',
- 0, status);
- break;
- case ICU_chain_step_type_tokenize:
- step->u.tokenizer = icu_tokenizer_create((char *) chain->locale,
- (char) rule[0], status);
- break;
- case ICU_chain_step_type_transliterate:
- /* we pass a dummy ID to utrans_openU.. */
- step->u.transform = icu_transform_create("custom", 'f',
- (const char *) rule, status);
- break;
- default:
- break;
- }
- return step;
-}
-
-
-void icu_chain_step_destroy(struct icu_chain_step * step)
-{
- if (!step)
- return;
-
- icu_chain_step_destroy(step->previous);
-
- switch(step->type)
- {
- case ICU_chain_step_type_display:
- break;
- case ICU_chain_step_type_casemap:
- icu_casemap_destroy(step->u.casemap);
- icu_buf_utf16_destroy(step->buf16);
- break;
- case ICU_chain_step_type_transform:
- case ICU_chain_step_type_transliterate:
- icu_transform_destroy(step->u.transform);
- icu_buf_utf16_destroy(step->buf16);
- break;
- case ICU_chain_step_type_tokenize:
- icu_tokenizer_destroy(step->u.tokenizer);
- icu_buf_utf16_destroy(step->buf16);
- break;
- default:
- break;
- }
- xfree(step);
-}
-
-struct icu_chain * icu_chain_create(const char *locale, int sort,
- UErrorCode * status)
-{
- struct icu_chain * chain
- = (struct icu_chain *) xmalloc(sizeof(struct icu_chain));
-
- *status = U_ZERO_ERROR;
-
- chain->locale = xstrdup(locale);
-
- chain->sort = sort;
-
- chain->coll = ucol_open((const char *) chain->locale, status);
-
- if (U_FAILURE(*status))
- return 0;
-
- chain->token_count = 0;
-
- chain->src8cstr = 0;
-
- chain->display8 = icu_buf_utf8_create(0);
- chain->norm8 = icu_buf_utf8_create(0);
- chain->sort8 = icu_buf_utf8_create(0);
-
- chain->src16 = icu_buf_utf16_create(0);
-
- chain->steps = 0;
-
- return chain;
-}
-
-void icu_chain_destroy(struct icu_chain * chain)
-{
- if (chain)
- {
- if (chain->coll)
- ucol_close(chain->coll);
-
- icu_buf_utf8_destroy(chain->display8);
- icu_buf_utf8_destroy(chain->norm8);
- icu_buf_utf8_destroy(chain->sort8);
-
- icu_buf_utf16_destroy(chain->src16);
-
- icu_chain_step_destroy(chain->steps);
- xfree(chain->locale);
- xfree(chain);
- }
-}
-
-struct icu_chain * icu_chain_xml_config(const xmlNode *xml_node,
- int sort,
- UErrorCode * status)
-{
- xmlNode *node = 0;
- struct icu_chain * chain = 0;
-
- *status = U_ZERO_ERROR;
-
- if (!xml_node ||xml_node->type != XML_ELEMENT_NODE)
- return 0;
-
- {
- xmlChar * xml_locale = xmlGetProp((xmlNode *) xml_node,
- (xmlChar *) "locale");
-
- if (xml_locale)
- {
- chain = icu_chain_create((const char *) xml_locale, sort, status);
- xmlFree(xml_locale);
- }
-
- }
- if (!chain)
- return 0;
-
- for (node = xml_node->children; node; node = node->next)
- {
- xmlChar *xml_rule;
- struct icu_chain_step * step = 0;
-
- if (node->type != XML_ELEMENT_NODE)
- continue;
-
- xml_rule = xmlGetProp(node, (xmlChar *) "rule");
-
- if (!strcmp((const char *) node->name, "casemap"))
- step = icu_chain_insert_step(chain, ICU_chain_step_type_casemap,
- (const uint8_t *) xml_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);
- 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);
- 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);
- 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, "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);
- }
- else if (!strcmp((const char *) node->name, "index")
- || !strcmp((const char *) node->name, "sortkey"))
- {
- yaz_log(YLOG_WARN, "Element %s is no longer needed. "
- "Remove it from the configuration", node->name);
- }
- else
- {
- yaz_log(YLOG_WARN, "Unknown element %s", node->name);
- icu_chain_destroy(chain);
- return 0;
- }
- xmlFree(xml_rule);
- if (step && U_FAILURE(*status))
- {
- icu_chain_destroy(chain);
- return 0;
- }
- }
- return chain;
-}
-
-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_buf_utf16 * src16 = 0;
- struct icu_buf_utf16 * buf16 = 0;
-
- if (!chain || !type || !rule)
- return 0;
-
- /* assign utf16 src buffers as needed */
- if (chain->steps && chain->steps->buf16)
- src16 = chain->steps->buf16;
- else if (chain->src16)
- src16 = chain->src16;
- else
- return 0;
-
- /* create utf16 destination buffers as needed, or */
- switch(type)
- {
- case ICU_chain_step_type_display:
- buf16 = src16;
- break;
- case ICU_chain_step_type_casemap:
- buf16 = icu_buf_utf16_create(0);
- break;
- case ICU_chain_step_type_transform:
- case ICU_chain_step_type_transliterate:
- buf16 = icu_buf_utf16_create(0);
- break;
- case ICU_chain_step_type_tokenize:
- buf16 = icu_buf_utf16_create(0);
- break;
- break;
- default:
- break;
- }
- /* create actual chain step with this buffer */
- step = icu_chain_step_create(chain, type, rule, buf16, status);
-
- step->previous = chain->steps;
- chain->steps = step;
-
- return step;
-}
-
-static int icu_chain_step_next_token(struct icu_chain * chain,
- struct icu_chain_step * step,
- UErrorCode *status)
-{
- struct icu_buf_utf16 * src16 = 0;
- int got_new_token = 0;
-
- if (!chain || !chain->src16 || !step || !step->more_tokens)
- return 0;
-
- /* assign utf16 src buffers as needed, advance in previous steps
- tokens until non-zero token met, and setting stop condition */
-
- if (step->previous)
- {
- src16 = step->previous->buf16;
- /* tokens might be killed in previous steps, therefore looping */
-
- while (step->need_new_token
- && step->previous->more_tokens
- && !got_new_token)
- got_new_token
- = icu_chain_step_next_token(chain, step->previous, status);
- }
- else
- { /* first step can only work once on chain->src16 input buffer */
- src16 = chain->src16;
- step->more_tokens = 0;
- got_new_token = 1;
- }
-
- if (!src16)
- return 0;
-
- /* stop if nothing to process */
- if (step->need_new_token && !got_new_token)
- {
- step->more_tokens = 0;
- return 0;
- }
-
- /* either an old token not finished yet, or a new token, thus
- perform the work, eventually put this steps output in
- step->buf16 or the chains UTF8 output buffers */
-
- switch(step->type)
- {
- case ICU_chain_step_type_display:
- icu_utf16_to_utf8(chain->display8, src16, status);
- break;
- case ICU_chain_step_type_casemap:
- icu_casemap_casemap(step->u.casemap,
- step->buf16, src16, status,
- chain->locale);
- break;
- case ICU_chain_step_type_transform:
- case ICU_chain_step_type_transliterate:
- icu_transform_trans(step->u.transform,
- step->buf16, src16, status);
- break;
- case ICU_chain_step_type_tokenize:
- /* attach to new src16 token only first time during splitting */
- if (step->need_new_token)
- {
- icu_tokenizer_attach(step->u.tokenizer, src16, status);
- step->need_new_token = 0;
- }
-
- /* splitting one src16 token into multiple buf16 tokens */
- step->more_tokens
- = icu_tokenizer_next_token(step->u.tokenizer,
- step->buf16, status);
-
- /* make sure to get new previous token if this one had been used up
- by recursive call to _same_ step */
-
- if (!step->more_tokens)
- {
- step->more_tokens = icu_chain_step_next_token(chain, step, status);
- return step->more_tokens; /* avoid one token count too much! */
- }
- break;
- default:
- return 0;
- break;
- }
-
- if (U_FAILURE(*status))
- return 0;
-
- /* if token disappered into thin air, tell caller */
- /* if (!step->buf16->utf16_len && !step->more_tokens) */
- /* return 0; */
-
- return 1;
-}
-
-int icu_chain_assign_cstr(struct icu_chain * chain, const char * src8cstr,
- UErrorCode *status)
-{
- struct icu_chain_step * stp = 0;
-
- if (!chain || !src8cstr)
- return 0;
-
- chain->src8cstr = src8cstr;
-
- stp = chain->steps;
-
- /* clear token count */
- chain->token_count = 0;
-
- /* clear all steps stop states */
- while (stp)
- {
- stp->more_tokens = 1;
- stp->need_new_token = 1;
- stp = stp->previous;
- }
-
- /* finally convert UTF8 to UTF16 string if needed */
- if (chain->steps || chain->sort)
- icu_utf16_from_utf8_cstr(chain->src16, chain->src8cstr, status);
-
- if (U_FAILURE(*status))
- return 0;
-
- return 1;
-}
-
-int icu_chain_next_token(struct icu_chain * chain, UErrorCode *status)
-{
- int got_token = 0;
-
- *status = U_ZERO_ERROR;
-
- if (!chain)
- return 0;
-
- /* special case with no steps - same as index type binary */
- if (!chain->steps)
- {
- if (chain->token_count)
- return 0;
- else
- {
- chain->token_count++;
-
- if (chain->sort)
- icu_sortkey8_from_utf16(chain->coll,
- chain->sort8, chain->steps->buf16,
- status);
- return chain->token_count;
- }
- }
- /* usual case, one or more icu chain steps existing */
- else
- {
- while (!got_token && chain->steps && chain->steps->more_tokens)
- got_token = icu_chain_step_next_token(chain, chain->steps, status);
-
- if (got_token)
- {
- chain->token_count++;
-
- icu_utf16_to_utf8(chain->norm8, chain->steps->buf16, status);
-
- if (chain->sort)
- icu_sortkey8_from_utf16(chain->coll,
- chain->sort8, chain->steps->buf16,
- status);
- return chain->token_count;
- }
- }
-
- return 0;
-}
-
-int icu_chain_token_number(struct icu_chain * chain)
-{
- if (!chain)
- return 0;
-
- return chain->token_count;
-}
-
-const char * icu_chain_token_display(struct icu_chain * chain)
-{
- if (chain->display8)
- return icu_buf_utf8_to_cstr(chain->display8);
-
- return 0;
-}
-
-const char * icu_chain_token_norm(struct icu_chain * chain)
-{
- if (!chain->steps)
- return chain->src8cstr;
-
- if (chain->norm8)
- return icu_buf_utf8_to_cstr(chain->norm8);
-
- return 0;
-}
-
-const char * icu_chain_token_sortkey(struct icu_chain * chain)
-{
- if (chain->sort8)
- return icu_buf_utf8_to_cstr(chain->sort8);
-
- return 0;
-}
-
-const UCollator * icu_chain_get_coll(struct icu_chain * chain)
-{
- return chain->coll;
-}
-
-#endif /* YAZ_HAVE_ICU */
-
-/*
- * Local variables:
- * c-basic-offset: 4
- * c-file-style: "Stroustrup"
- * indent-tabs-mode: nil
- * End:
- * vim: shiftwidth=4 tabstop=8 expandtab
- */
-
projects / yaz-moved-to-github.git / blobdiff