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zero-epwing-go/multi.c
Alex Yatskov 13de8b5081 Cleanup
2021-01-09 15:22:43 -08:00

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/*
* Copyright (c) 1997-2006 Motoyuki Kasahara
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the project 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 PROJECT 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 PROJECT OR 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.
*/
#include "build-pre.h"
#include "eb.h"
#include "error.h"
#include "build-post.h"
/*
* Get information about the current subbook.
*/
EB_Error_Code
eb_load_multi_searches(EB_Book *book)
{
EB_Error_Code error_code;
EB_Subbook *subbook;
EB_Multi_Search *multi;
EB_Search *entry;
char buffer[EB_SIZE_PAGE];
char *buffer_p;
int index_count;
int index_id;
int i, j, k;
LOG(("in: eb_load_multi_searches(book=%d)", book->code));
subbook = book->subbook_current;
for (i = 0, multi = subbook->multis; i < subbook->multi_count;
i++, multi++) {
/*
* Read the index table page of the multi search.
*/
if (zio_lseek(&subbook->text_zio,
((off_t) multi->search.start_page - 1) * EB_SIZE_PAGE, SEEK_SET)
< 0) {
error_code = EB_ERR_FAIL_SEEK_TEXT;
goto failed;
}
if (zio_read(&subbook->text_zio, buffer, EB_SIZE_PAGE)
!= EB_SIZE_PAGE) {
error_code = EB_ERR_FAIL_READ_TEXT;
goto failed;
}
/*
* Get the number of entries in this multi search.
*/
multi->entry_count = eb_uint2(buffer);
if (EB_MAX_MULTI_SEARCHES <= multi->entry_count) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
buffer_p = buffer + 16;
for (j = 0, entry = multi->entries;
j < multi->entry_count; j++, entry++) {
/*
* Get the number of indexes in this entry, and title
* of this entry.
*/
index_count = eb_uint1(buffer_p);
strncpy(entry->label, buffer_p + 2, EB_MAX_MULTI_LABEL_LENGTH);
entry->label[EB_MAX_MULTI_LABEL_LENGTH] = '\0';
eb_jisx0208_to_euc(entry->label, entry->label);
buffer_p += EB_MAX_MULTI_LABEL_LENGTH + 2;
/*
* Initialize index page information of the entry.
*/
for (k = 0; k < index_count; k++) {
/*
* Get the index page information of the entry.
*/
index_id = eb_uint1(buffer_p);
switch (index_id) {
case 0x71:
case 0x91:
case 0xa1:
if (entry->start_page != 0 && entry->index_id != 0x71)
break;
entry->start_page = eb_uint4(buffer_p + 2);
entry->end_page = entry->start_page
+ eb_uint4(buffer_p + 6) - 1;
entry->index_id = index_id;
entry->katakana = EB_INDEX_STYLE_ASIS;
entry->lower = EB_INDEX_STYLE_CONVERT;
entry->mark = EB_INDEX_STYLE_ASIS;
entry->long_vowel = EB_INDEX_STYLE_ASIS;
entry->double_consonant = EB_INDEX_STYLE_ASIS;
entry->contracted_sound = EB_INDEX_STYLE_ASIS;
entry->voiced_consonant = EB_INDEX_STYLE_ASIS;
entry->small_vowel = EB_INDEX_STYLE_ASIS;
entry->p_sound = EB_INDEX_STYLE_ASIS;
entry->space = EB_INDEX_STYLE_ASIS;
break;
case 0x01:
entry->candidates_page = eb_uint4(buffer_p + 2);
break;
}
buffer_p += 16;
}
}
}
LOG(("out: eb_load_multi_searches() = %s", eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
LOG(("out: eb_load_multi_searches() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Default multi search titles (written in JIS X 0208).
*/
static const char *default_multi_titles_jisx0208[] = {
"J#9g8!:w#1", /* Multi search 1. */
"J#9g8!:w#2", /* Multi search 2. */
"J#9g8!:w#3", /* Multi search 3. */
"J#9g8!:w#4", /* Multi search 4. */
"J#9g8!:w#5", /* Multi search 5. */
"J#9g8!:w#6", /* Multi search 6. */
"J#9g8!:w#7", /* Multi search 7. */
"J#9g8!:w#8", /* Multi search 8. */
"J#9g8!:w#9", /* Multi search 9. */
"J#9g8!:w#1#0", /* Multi search 10. */
};
/*
* Default multi search titles (written in ASCII, subset of ISO 8859-1).
*/
static const char *default_multi_titles_latin[] = {
"Multi search 1",
"Multi search 2",
"Multi search 3",
"Multi search 4",
"Multi search 5",
"Multi search 6",
"Multi search 7",
"Multi search 8",
"Multi search 9",
"Multi search 10",
};
/*
* Load multi search titles.
*/
EB_Error_Code
eb_load_multi_titles(EB_Book *book)
{
EB_Error_Code error_code;
EB_Subbook *subbook;
char buffer[EB_SIZE_PAGE];
int title_count;
char *title;
size_t offset;
int i;
LOG(("in: eb_load_multi_searches(book=%d)", book->code));
subbook = book->subbook_current;
/*
* Set default titles.
*/
if (book->character_code == EB_CHARCODE_ISO8859_1) {
for (i = 0; i < subbook->multi_count; i++) {
title = subbook->multis[i].title;
strcpy(title, default_multi_titles_latin[i]);
}
} else {
for (i = 0; i < subbook->multi_count; i++) {
title = subbook->multis[i].title;
strcpy(title, default_multi_titles_jisx0208[i]);
eb_jisx0208_to_euc(title, title);
}
}
if (book->disc_code != EB_DISC_EPWING || subbook->search_title_page == 0)
goto succeeded;
/*
* Read the page of the multi search.
*/
if (zio_lseek(&subbook->text_zio,
((off_t) subbook->search_title_page - 1) * EB_SIZE_PAGE, SEEK_SET)
< 0) {
error_code = EB_ERR_FAIL_SEEK_TEXT;
goto failed;
}
if (zio_read(&subbook->text_zio, buffer, EB_SIZE_PAGE) != EB_SIZE_PAGE) {
error_code = EB_ERR_FAIL_READ_TEXT;
goto failed;
}
title_count = eb_uint2(buffer);
if (EB_MAX_SEARCH_TITLES < title_count)
title_count = EB_MAX_SEARCH_TITLES;
/*
* We need titles for multi searches only.
* titles[ 0]: title for word and endword searches.
* titles[ 1]: title for keyword search.
* titles[ 2]: common title for all multi searches.
* (we don't need this)
* titles[ 3]: title for multi search 1.
* :
* titles[12]: title for multi search 10.
* titles[13]: title for menu search.
*
* The offset of titles[3] is:
* the number of entries(2bytes)
* + reserved 1 (68bytes)
* + title for word and endword searches (70bytes)
* + title for keyword search (70bytes)
* + common title for all multi searches (70bytes)
* + reserved 2 (70bytes)
* = 2 + 68 + 70 + 70 + 70 + 70 = 350
*/
for (i = 4, offset = 350; i < EB_MAX_SEARCH_TITLES; i++, offset += 70) {
if (subbook->multi_count <= i - 4)
break;
if (eb_uint2(buffer + offset) != 0x02)
continue;
/*
* Each titles[] consists of
* parameter (2bytes)
* short title (16bytes)
* long title (32bytes)
* We get long title rather than short one.
*/
title = subbook->multis[i - 4].title;
strncpy(title, buffer + offset + 2 + 16, EB_MAX_MULTI_TITLE_LENGTH);
title[EB_MAX_MULTI_TITLE_LENGTH] = '\0';
eb_jisx0208_to_euc(title, title);
}
succeeded:
LOG(("out: eb_load_multi_titles() = %s", eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
LOG(("out: eb_load_multi_titles() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Examine whether the current subbook in `book' supports `MULTI SEARCH'
* or not.
*/
int
eb_have_multi_search(EB_Book *book)
{
LOG(("in: eb_have_multi_search(book=%d)", (int)book->code));
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL)
goto failed;
if (book->subbook_current->multi_count == 0)
goto failed;
LOG(("out: eb_have_multi_search() = %d", 1));
return 1;
/*
* An error occurs...
*/
failed:
LOG(("out: eb_have_multi_search() = %d", 0));
return 0;
}
/*
* Return a title of the multi search `multi_id'.
*/
EB_Error_Code
eb_multi_title(EB_Book *book, EB_Multi_Search_Code multi_id, char *title)
{
EB_Error_Code error_code;
EB_Subbook *subbook;
LOG(("in: eb_multi_title(book=%d, multi_id=%d)",
(int)book->code, (int)multi_id));
/*
* The book must have been bound.
*/
if (book->path == NULL) {
error_code = EB_ERR_UNBOUND_BOOK;
goto failed;
}
/*
* Current subbook must have been set.
*/
subbook = book->subbook_current;
if (subbook == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
/*
* `multi_id' must be a valid code.
*/
if (multi_id < 0 || subbook->multi_count <= multi_id) {
error_code = EB_ERR_NO_SUCH_MULTI_ID;
goto failed;
}
strcpy(title, subbook->multis[multi_id].title);
LOG(("out: eb_multi_title(title=%s) = %s", title,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
*title = '\0';
LOG(("out: eb_multi_title() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Return a list of multi search ids in `book'.
*/
EB_Error_Code
eb_multi_search_list(EB_Book *book, EB_Multi_Search_Code *search_list,
int *search_count)
{
EB_Error_Code error_code;
EB_Subbook_Code *list_p;
int i;
LOG(("in: eb_multi_search_list(book=%d)", (int)book->code));
/*
* The book must have been bound.
*/
if (book->path == NULL) {
error_code = EB_ERR_UNBOUND_BOOK;
goto failed;
}
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
*search_count = book->subbook_current->multi_count;
for (i = 0, list_p = search_list; i < *search_count; i++, list_p++)
*list_p = i;
LOG(("out: eb_multi_search_list(search_count=%d) = %s", *search_count,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
*search_count = 0;
LOG(("out: eb_multi_search_list() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Return the number of entries that the multi search `multi_id' in `book'.
*/
EB_Error_Code
eb_multi_entry_count(EB_Book *book, EB_Multi_Search_Code multi_id,
int *entry_count)
{
EB_Error_Code error_code;
LOG(("in: eb_multi_entry_count(book=%d, multi_id=%d)", (int)book->code,
(int)multi_id));
/*
* The book must have been bound.
*/
if (book->path == NULL) {
error_code = EB_ERR_UNBOUND_BOOK;
goto failed;
}
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
/*
* `multi_id' must be a valid code.
*/
if (multi_id < 0 || book->subbook_current->multi_count <= multi_id) {
error_code = EB_ERR_NO_SUCH_MULTI_ID;
goto failed;
}
*entry_count = book->subbook_current->multis[multi_id].entry_count;
LOG(("out: eb_multi_entry_count(entry_count=%d) = %s", (int)*entry_count,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
*entry_count = 0;
LOG(("out: eb_multi_entry_count() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Return a list of entries that the multi search `multi_id' in `book' has.
* (Legacy function)
*/
EB_Error_Code
eb_multi_entry_list(EB_Book *book, EB_Multi_Search_Code multi_id,
int *entry_list, int *entry_count)
{
EB_Error_Code error_code;
EB_Subbook_Code *list_p;
int i;
error_code = eb_multi_entry_count(book, multi_id, entry_count);
if (error_code != EB_SUCCESS)
return error_code;
for (i = 0, list_p = entry_list; i < *entry_count; i++, list_p++)
*list_p = i;
return EB_SUCCESS;
}
/*
* Return a lable of the entry `entry_index' in the multi search `multi_id'.
*/
EB_Error_Code
eb_multi_entry_label(EB_Book *book, EB_Multi_Search_Code multi_id,
int entry_index, char *label)
{
EB_Error_Code error_code;
EB_Subbook *subbook;
LOG(("in: eb_multi_entry_label(book=%d, multi_id=%d, entry_index=%d)",
(int)book->code, (int)multi_id, entry_index));
/*
* The book must have been bound.
*/
if (book->path == NULL) {
error_code = EB_ERR_UNBOUND_BOOK;
goto failed;
}
/*
* Current subbook must have been set.
*/
subbook = book->subbook_current;
if (subbook == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
/*
* `multi_id' must be a valid code.
*/
if (multi_id < 0 || subbook->multi_count <= multi_id) {
error_code = EB_ERR_NO_SUCH_MULTI_ID;
goto failed;
}
/*
* `entry_index' must be a valid code.
*/
if (entry_index < 0
|| subbook->multis[multi_id].entry_count <= entry_index) {
error_code = EB_ERR_NO_SUCH_ENTRY_ID;
goto failed;
}
strcpy(label, subbook->multis[multi_id].entries[entry_index].label);
LOG(("out: eb_multi_entry_label(label=%s) = %s", label,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
*label = '\0';
LOG(("out: eb_multi_entry_label() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Whether the entry `entry_index' in the multi search `multi_id' has
* candidates or not.
*/
int
eb_multi_entry_have_candidates(EB_Book *book, EB_Multi_Search_Code multi_id,
int entry_index)
{
EB_Multi_Search *multi;
LOG(("in: eb_multi_entry_have_candidates(book=%d, multi_id=%d, \
entry_index=%d)",
(int)book->code, (int)multi_id, entry_index));
/*
* The book must have been bound.
*/
if (book->path == NULL)
goto failed;
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL)
goto failed;
/*
* `multi_id' must be a valid code.
*/
if (multi_id < 0 || book->subbook_current->multi_count <= multi_id)
goto failed;
/*
* `entry_index' must be a valid code.
*/
multi = book->subbook_current->multis + multi_id;
if (entry_index < 0 || multi->entry_count <= entry_index)
goto failed;
if (multi->entries[entry_index].candidates_page == 0)
goto failed;
LOG(("out: eb_multi_entry_have_candidates() = %d", 1));
return 1;
/*
* An error occurs...
*/
failed:
LOG(("out: eb_multi_entry_have_candidates() = %d", 0));
return 0;
}
/*
* Return a position of candidates for the entry `entry_index' in the multi
* search `multi_id'.
*/
EB_Error_Code
eb_multi_entry_candidates(EB_Book *book, EB_Multi_Search_Code multi_id,
int entry_index, EB_Position *position)
{
EB_Error_Code error_code;
EB_Multi_Search *multi;
LOG(("in: eb_multi_entry_candidates(book=%d, multi_id=%d, entry_index=%d)",
(int)book->code, (int)multi_id, entry_index));
/*
* The book must have been bound.
*/
if (book->path == NULL) {
error_code = EB_ERR_UNBOUND_BOOK;
goto failed;
}
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
/*
* `multi_id' must be a valid code.
*/
if (multi_id < 0 || book->subbook_current->multi_count <= multi_id) {
error_code = EB_ERR_NO_SUCH_MULTI_ID;
goto failed;
}
/*
* `entry_index' must be a valid code.
*/
multi = book->subbook_current->multis + multi_id;
if (entry_index < 0 || multi->entry_count <= entry_index) {
error_code = EB_ERR_NO_SUCH_ENTRY_ID;
goto failed;
}
if (multi->entries[entry_index].candidates_page == 0) {
error_code = EB_ERR_NO_CANDIDATES;
goto failed;
}
position->page = multi->entries[entry_index].candidates_page;
position->offset = 0;
LOG(("out: eb_multi_entry_candidates(position={%d,%d}) = %s",
position->page, position->offset, eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
LOG(("out: eb_multi_entry_candidates() = %s",
eb_error_string(error_code)));
return error_code;
}
/*
* Multi search.
*/
EB_Error_Code
eb_search_multi(EB_Book *book, EB_Multi_Search_Code multi_id,
const char * const input_words[])
{
EB_Error_Code error_code;
EB_Search_Context *context;
EB_Search *entry;
EB_Word_Code word_code;
int word_count;
int i;
LOG(("in: eb_search_multi(book=%d, multi_id=%d, input_words=[below])",
(int)book->code, (int)multi_id));
if (eb_log_flag) {
for (i = 0; i < EB_MAX_KEYWORDS && input_words[i] != NULL; i++) {
LOG((" input_words[%d]=%s", i,
eb_quoted_string(input_words[i])));
}
LOG((" input_words[%d]=NULL", i));
}
/*
* Current subbook must have been set.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
/*
* Check whether the current subbook has keyword search.
*/
if (multi_id < 0 || book->subbook_current->multi_count <= multi_id) {
error_code = EB_ERR_NO_SUCH_SEARCH;
goto failed;
}
/*
* Attach a search context for each keyword, and pre-search the
* keywords.
*/
eb_reset_search_contexts(book);
word_count = 0;
for (i = 0, entry = book->subbook_current->multis[multi_id].entries;
i < book->subbook_current->multis[multi_id].entry_count;
i++, entry++) {
if (input_words[i] == NULL)
break;
/*
* Initialize search context.
*/
context = book->search_contexts + word_count;
context->code = EB_SEARCH_MULTI;
/*
* Choose comparison functions.
*/
if (entry->candidates_page == 0) {
if (book->character_code == EB_CHARCODE_ISO8859_1) {
context->compare_pre = eb_pre_match_word;
context->compare_single = eb_match_word;
context->compare_group = eb_match_word;
} else {
context->compare_pre = eb_pre_match_word;
context->compare_single = eb_match_word;
context->compare_group = eb_match_word_kana_group;
}
} else {
if (book->character_code == EB_CHARCODE_ISO8859_1) {
context->compare_pre = eb_exact_pre_match_word_latin;
context->compare_single = eb_exact_match_word_latin;
context->compare_group = eb_exact_match_word_latin;
} else {
context->compare_pre = eb_exact_pre_match_word_jis;
context->compare_single = eb_exact_match_word_jis;
context->compare_group = eb_exact_match_word_kana_group;
}
}
context->page = entry->start_page;
if (context->page == 0)
continue;
/*
* Make a fixed word and a canonicalized word to search from
* `input_words[i]'.
*/
error_code = eb_set_multiword(book, multi_id, i, input_words[i],
context->word, context->canonicalized_word, &word_code);
if (error_code == EB_ERR_EMPTY_WORD)
continue;
else if (error_code != EB_SUCCESS)
goto failed;
/*
* Pre-search.
*/
error_code = eb_presearch_word(book, context);
if (error_code != EB_SUCCESS)
goto failed;
word_count++;
}
if (word_count == 0) {
error_code = EB_ERR_NO_WORD;
goto failed;
} else if (book->subbook_current->multis[multi_id].entry_count <= i
&& input_words[i] != NULL) {
error_code = EB_ERR_TOO_MANY_WORDS;
goto failed;
}
/*
* Set `EB_SEARCH_NONE' to the rest unused search context.
*/
for (i = word_count; i < EB_MAX_KEYWORDS; i++)
(book->search_contexts + i)->code = EB_SEARCH_NONE;
LOG(("out: eb_search_multi() = %s", eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
eb_reset_search_contexts(book);
LOG(("out: eb_search_multi() = %s", eb_error_string(error_code)));
return error_code;
}
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