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readtext.c
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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 "text.h"
#include "build-post.h"
/*
* The maximum number of arguments for an escape sequence.
*/
#define EB_MAX_ARGV 7
/*
* Read next when the length of cached data is shorter than this value.
*/
#define SIZE_FEW_REST 48
/*
* Special skip-code that represents `no skip-code is set'.
*/
#define SKIP_CODE_NONE -1
/*
* Cache data buffer.
*/
static char cache_buffer[EB_SIZE_PAGE];
/*
* Book code of which `cache_buffer' records data.
*/
static EB_Book_Code cache_book_code = EB_BOOK_NONE;
/*
* Location of cache data loaded in `cache_buffer'.
*/
static off_t cache_location;
/*
* Length of cache data loaded in `cache_buffer'.
*/
static size_t cache_length;
/*
* Null hook.
*/
static const EB_Hook null_hook = {EB_HOOK_NULL, NULL};
/*
* Unexported functions.
*/
static EB_Error_Code eb_read_text_internal(EB_Book *book,
EB_Appendix *appendix, EB_Hookset *hookset, void *container,
size_t text_max_length, char *text, ssize_t *text_length,
int forward_only);
static int eb_is_stop_code(EB_Book *book, EB_Appendix *appendix,
unsigned int code0, unsigned int code1);
/*
* Initialize text context of `book'.
*/
void
eb_initialize_text_context(EB_Book *book)
{
LOG(("in: eb_initialize_text_context(book=%d)", (int)book->code));
book->text_context.code = EB_TEXT_INVALID;
book->text_context.location = -1;
book->text_context.out = NULL;
book->text_context.out_rest_length = 0;
book->text_context.unprocessed = NULL;
book->text_context.unprocessed_size = 0;
book->text_context.out_step = 0;
book->text_context.narrow_flag = 0;
book->text_context.printable_count = 0;
book->text_context.file_end_flag = 0;
book->text_context.text_status = EB_TEXT_STATUS_CONTINUED;
book->text_context.skip_code = SKIP_CODE_NONE;
book->text_context.auto_stop_code = -1;
book->text_context.candidate[0] = '\0';
book->text_context.is_candidate = 0;
book->text_context.ebxac_gaiji_flag = 0;
LOG(("out: eb_initialize_text_context()"));
}
/*
* Finalize text context of `book'.
*/
void
eb_finalize_text_context(EB_Book *book)
{
LOG(("in: eb_finalize_text_context(book=%d)", (int)book->code));
if (book->text_context.unprocessed != NULL)
free(book->text_context.unprocessed);
LOG(("out: eb_finalize_text_context()"));
}
/*
* Reset text context of `book'.
* Note that `contexxt_code' and `context_location' are unchanged.
*/
void
eb_reset_text_context(EB_Book *book)
{
LOG(("in: eb_reset_text_context(book=%d)", (int)book->code));
eb_finalize_text_context(book);
book->text_context.out = NULL;
book->text_context.out_rest_length = 0;
book->text_context.unprocessed = NULL;
book->text_context.unprocessed_size = 0;
book->text_context.out_step = 0;
book->text_context.narrow_flag = 0;
book->text_context.printable_count = 0;
book->text_context.file_end_flag = 0;
book->text_context.text_status = EB_TEXT_STATUS_CONTINUED;
book->text_context.skip_code = SKIP_CODE_NONE;
book->text_context.auto_stop_code = -1;
book->text_context.candidate[0] = '\0';
book->text_context.is_candidate = 0;
book->text_context.ebxac_gaiji_flag = 0;
LOG(("out: eb_reset_text_context()"));
}
/*
* Invalidate text context of `book'.
*/
void
eb_invalidate_text_context(EB_Book *book)
{
LOG(("in: eb_invalidate_text_context(book=%d)", (int)book->code));
eb_finalize_text_context(book);
eb_initialize_text_context(book);
book->text_context.code = EB_TEXT_INVALID;
LOG(("out: eb_invalidate_text_context()"));
}
/*
* Reposition the offset of the subbook file.
*/
EB_Error_Code
eb_seek_text(EB_Book *book, const EB_Position *position)
{
EB_Error_Code error_code;
LOG(("in: eb_seek_text(book=%d, position={%d,%d})", (int)book->code,
position->page, position->offset));
/*
* Current subbook must have been set and START file must exist.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
if (zio_file(&book->subbook_current->text_zio) < 0) {
error_code = EB_ERR_NO_TEXT;
goto failed;
}
if (position->page <= 0 || position->offset < 0) {
error_code = EB_ERR_FAIL_SEEK_TEXT;
goto failed;
}
/*
* Set text-context variables.
*/
eb_reset_text_context(book);
book->text_context.code = EB_TEXT_SEEKED;
book->text_context.location = ((off_t) position->page - 1) * EB_SIZE_PAGE
+ position->offset;
/*
* Unlock cache data and the book.
*/
LOG(("out: eb_seek_text() = %s", eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
eb_invalidate_text_context(book);
LOG(("out: eb_seek_text() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Get the current text position of the subbook file.
*/
EB_Error_Code
eb_tell_text(EB_Book *book, EB_Position *position)
{
EB_Error_Code error_code;
LOG(("in: eb_tell_text(book=%d)", (int)book->code));
/*
* Current subbook must have been set and START file must exist.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
if (zio_file(&book->subbook_current->text_zio) < 0) {
error_code = EB_ERR_NO_TEXT;
goto failed;
}
position->page = book->text_context.location / EB_SIZE_PAGE + 1;
position->offset = book->text_context.location % EB_SIZE_PAGE;
LOG(("out: eb_seek_text(position={%d,%d}) = %s",
position->page, position->offset, eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
eb_invalidate_text_context(book);
LOG(("out: eb_seek_text() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Get text in the current subbook in `book'.
*/
EB_Error_Code
eb_read_text(EB_Book *book, EB_Appendix *appendix, EB_Hookset *hookset,
void *container, size_t text_max_length, char *text, ssize_t *text_length)
{
EB_Error_Code error_code;
const EB_Hook *hook;
EB_Position position;
LOG(("in: eb_read_text(book=%d, appendix=%d, text_max_length=%ld)",
(int)book->code, (appendix != NULL) ? (int)appendix->code : 0,
(long)text_max_length));
/*
* Current subbook must have been set and START file must exist.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
if (zio_file(&book->subbook_current->text_zio) < 0) {
error_code = EB_ERR_NO_TEXT;
goto failed;
}
/*
* Use `eb_default_hookset' when `hookset' is `NULL'.
*/
if (hookset == NULL)
hookset = &eb_default_hookset;
/*
* Set text mode to `text'.
*/
if (book->text_context.code == EB_TEXT_INVALID) {
error_code = EB_ERR_NO_PREV_SEEK;
goto failed;
} else if (book->text_context.code == EB_TEXT_SEEKED) {
eb_tell_text(book, &position);
eb_reset_text_context(book);
if (book->subbook_current->menu.start_page <= position.page
&& position.page <= book->subbook_current->menu.end_page)
book->text_context.code = EB_TEXT_OPTIONAL_TEXT;
else if (book->subbook_current->image_menu.start_page <= position.page
&& position.page <= book->subbook_current->image_menu.end_page)
book->text_context.code = EB_TEXT_OPTIONAL_TEXT;
else if (book->subbook_current->copyright.start_page <= position.page
&& position.page <= book->subbook_current->copyright.end_page)
book->text_context.code = EB_TEXT_OPTIONAL_TEXT;
else
book->text_context.code = EB_TEXT_MAIN_TEXT;
hook = hookset->hooks + EB_HOOK_INITIALIZE;
if (hook->function != NULL) {
error_code = hook->function(book, appendix, container,
EB_HOOK_INITIALIZE, 0, NULL);
if (error_code != EB_SUCCESS)
goto failed;
}
} else if (book->text_context.code != EB_TEXT_MAIN_TEXT
&& book->text_context.code != EB_TEXT_OPTIONAL_TEXT) {
error_code = EB_ERR_DIFF_CONTENT;
goto failed;
}
error_code = eb_read_text_internal(book, appendix, hookset, container,
text_max_length, text, text_length, 0);
if (error_code != EB_SUCCESS)
goto failed;
LOG(("out: eb_read_text(text_length=%ld) = %s", (long)*text_length,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
eb_invalidate_text_context(book);
LOG(("out: eb_read_text() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Get text in the current subbook in `book'.
*/
EB_Error_Code
eb_read_heading(EB_Book *book, EB_Appendix *appendix, EB_Hookset *hookset,
void *container, size_t text_max_length, char *text, ssize_t *text_length)
{
EB_Error_Code error_code;
const EB_Hook *hook;
LOG(("in: eb_read_heading(book=%d, appendix=%d, text_max_length=%ld)",
(int)book->code, (appendix != NULL) ? (int)appendix->code : 0,
(long)text_max_length));
/*
* Current subbook must have been set and START file must exist.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
if (zio_file(&book->subbook_current->text_zio) < 0) {
error_code = EB_ERR_NO_TEXT;
goto failed;
}
/*
* Use `eb_default_hookset' when `hookset' is `NULL'.
*/
if (hookset == NULL)
hookset = &eb_default_hookset;
/*
* Set text mode to `heading'.
*/
if (book->text_context.code == EB_TEXT_INVALID) {
error_code = EB_ERR_NO_PREV_SEEK;
goto failed;
} else if (book->text_context.code == EB_TEXT_SEEKED) {
eb_reset_text_context(book);
book->text_context.code = EB_TEXT_HEADING;
hook = hookset->hooks + EB_HOOK_INITIALIZE;
if (hook->function != NULL) {
error_code = hook->function(book, appendix, container,
EB_HOOK_INITIALIZE, 0, NULL);
if (error_code != EB_SUCCESS)
goto failed;
}
} else if (book->text_context.code != EB_TEXT_HEADING) {
error_code = EB_ERR_DIFF_CONTENT;
goto failed;
}
error_code = eb_read_text_internal(book, appendix, hookset, container,
text_max_length, text, text_length, 0);
if (error_code != EB_SUCCESS)
goto failed;
LOG(("out: eb_read_heading(text_length=%ld) = %s", (long)*text_length,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
eb_invalidate_text_context(book);
LOG(("out: eb_read_heading() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Read data from the subbook file directly.
*/
EB_Error_Code
eb_read_rawtext(EB_Book *book, size_t text_max_length, char *text,
ssize_t *text_length)
{
EB_Error_Code error_code;
LOG(("in: eb_read_rawtext(book=%d, text_max_length=%ld)",
(int)book->code, (long)text_max_length));
/*
* Current subbook must have been set and START file must exist.
*/
if (book->subbook_current == NULL) {
error_code = EB_ERR_NO_CUR_SUB;
goto failed;
}
if (zio_file(&book->subbook_current->text_zio) < 0) {
error_code = EB_ERR_NO_TEXT;
goto failed;
}
/*
* Set text mode to `rawtext'.
*/
if (book->text_context.code == EB_TEXT_INVALID) {
error_code = EB_ERR_NO_PREV_SEEK;
goto failed;
} else if (book->text_context.code == EB_TEXT_SEEKED) {
eb_reset_text_context(book);
book->text_context.code = EB_TEXT_RAWTEXT;
} else if (book->text_context.code != EB_TEXT_RAWTEXT) {
error_code = EB_ERR_DIFF_CONTENT;
goto failed;
}
/*
* Seek START file and read data.
*/
if (zio_lseek(&book->subbook_current->text_zio,
book->text_context.location, SEEK_SET) == -1) {
error_code = EB_ERR_FAIL_SEEK_TEXT;
goto failed;
}
*text_length = zio_read(&book->subbook_current->text_zio, text,
text_max_length);
book->text_context.location += *text_length;
if (*text_length < 0) {
error_code = EB_ERR_FAIL_READ_TEXT;
goto failed;
}
LOG(("out: eb_read_rawtext(text_length=%ld) = %s", (long)*text_length,
eb_error_string(EB_SUCCESS)));
return EB_SUCCESS;
/*
* An error occurs...
*/
failed:
*text_length = -1;
eb_invalidate_text_context(book);
LOG(("out: eb_read_rawtext() = %s", eb_error_string(error_code)));
return error_code;
}
/*
* Get text or heading.
*/
static EB_Error_Code
eb_read_text_internal(EB_Book *book, EB_Appendix *appendix,
EB_Hookset *hookset, void *container, size_t text_max_length, char *text,
ssize_t *text_length, int forward_only)
{
EB_Error_Code error_code;
EB_Text_Context *context;
unsigned char c1, c2;
char *cache_p;
const EB_Hook *hook;
unsigned char *candidate_p;
size_t candidate_length;
size_t cache_rest_length;
size_t in_step;
unsigned int argv[EB_MAX_ARGV];
int argc;
LOG(("in: eb_read_text_internal(book=%d, appendix=%d, \
text_max_length=%ld, forward=%d)",
(int)book->code, (appendix != NULL) ? (int)appendix->code : 0,
(long)text_max_length, forward_only));
/*
* Initialize variables.
*/
context = &book->text_context;
context->out = text;
context->out_rest_length = text_max_length;
if (context->is_candidate) {
candidate_length = strlen(context->candidate);
candidate_p = (unsigned char *)context->candidate + candidate_length;
} else {
candidate_length = 0;
candidate_p = NULL;
}
/*
* If unprocessed string are rest in `context->unprocessed',
* copy them to `context->out'.
*/
if (context->unprocessed != NULL) {
if (!forward_only) {
if (context->out_rest_length < context->unprocessed_size)
goto succeeded;
memcpy(context->out, context->unprocessed,
context->unprocessed_size);
context->out += context->unprocessed_size;
context->out_rest_length -= context->unprocessed_size;
}
free(context->unprocessed);
context->unprocessed = NULL;
context->unprocessed_size = 0;
}
/*
* Return immediately if text-end-flag has been set.
*/
if (context->text_status != EB_TEXT_STATUS_CONTINUED)
goto succeeded;
/*
* Check for cache data.
* If cache data is not what we need, discard it.
*/
if (book->code == cache_book_code
&& cache_location <= context->location
&& context->location < cache_location + cache_length) {
cache_p = cache_buffer + (context->location - cache_location);
cache_rest_length = cache_length
- (context->location - cache_location);
} else {
cache_book_code = EB_BOOK_NONE;
cache_p = cache_buffer;
cache_length = 0;
cache_rest_length = 0;
}
for (;;) {
in_step = 0;
context->out_step = 0;
argc = 1;
/*
* If it reaches to the near of the end of the cache buffer,
* then moves remaind cache text to the beginning of the cache
* buffer, and reads a next chunk from a file.
*/
if (cache_rest_length < SIZE_FEW_REST && !context->file_end_flag) {
ssize_t read_result;
if (0 < cache_rest_length)
memmove(cache_buffer, cache_p, cache_rest_length);
if (zio_lseek(&book->subbook_current->text_zio,
context->location + cache_rest_length, SEEK_SET) == -1) {
error_code = EB_ERR_FAIL_SEEK_TEXT;
goto failed;
}
read_result = zio_read(&book->subbook_current->text_zio,
cache_buffer + cache_rest_length,
EB_SIZE_PAGE - cache_rest_length);
if (read_result < 0) {
error_code = EB_ERR_FAIL_READ_TEXT;
goto failed;
} else if (read_result != EB_SIZE_PAGE - cache_rest_length)
context->file_end_flag = 1;
cache_book_code = book->code;
cache_location = context->location;
cache_length = cache_rest_length + read_result;
cache_p = cache_buffer;
cache_rest_length = cache_length;
}
/*
* Get 1 byte from the buffer.
*/
if (cache_rest_length < 1) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
c1 = eb_uint1(cache_p);
if (c1 == 0x1f) {
hook = &null_hook;
/*
* This is escape sequences.
*/
if (cache_rest_length < 2) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argv[0] = eb_uint2(cache_p);
c2 = eb_uint1(cache_p + 1);
switch (c2) {
case 0x02:
/* beginning of text */
in_step = 2;
break;
case 0x03:
/* end of text (don't set `in_step') */
context->text_status = EB_TEXT_STATUS_HARD_STOP;
if (forward_only) {
error_code = EB_ERR_END_OF_CONTENT;
goto failed;
}
goto succeeded;
case 0x04:
/* beginning of NARROW */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_NARROW;
context->narrow_flag = 1;
break;
case 0x05:
/* end of NARROW */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_NARROW;
context->narrow_flag = 0;
break;
case 0x06:
/* beginning of subscript */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_SUBSCRIPT;
break;
case 0x07:
/* end of subscript */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_SUBSCRIPT;
break;
case 0x09:
/* set indent */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 2;
argv[1] = eb_uint2(cache_p + 2);
if (0 < context->printable_count
&& context->code == EB_TEXT_MAIN_TEXT) {
if (eb_is_stop_code(book, appendix, argv[0], argv[1])) {
context->text_status = EB_TEXT_STATUS_SOFT_STOP;
goto succeeded;
}
}
hook = hookset->hooks + EB_HOOK_SET_INDENT;
break;
case 0x0a:
/* newline */
in_step = 2;
if (context->code == EB_TEXT_HEADING) {
context->text_status = EB_TEXT_STATUS_SOFT_STOP;
context->location += in_step;
goto succeeded;
}
hook = hookset->hooks + EB_HOOK_NEWLINE;
break;
case 0x0b:
/* beginning of unicode */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_UNICODE;
break;
case 0x0c:
/* end of unicode */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_UNICODE;
break;
case 0x0e:
/* beginning of superscript */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_SUPERSCRIPT;
break;
case 0x0f:
/* end of superscript */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_SUPERSCRIPT;
break;
case 0x10:
/* beginning of newline prohibition */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_NO_NEWLINE;
break;
case 0x11:
/* end of newline prohibition */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_NO_NEWLINE;
break;
case 0x12:
/* beginning of emphasis */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_EMPHASIS;
break;
case 0x13:
/* end of emphasis */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_EMPHASIS;
break;
case 0x14:
in_step = 4;
context->skip_code = 0x15;
break;
case 0x1a: case 0x1b: case 0x1e: case 0x1f:
/* emphasis; described in JIS X 4081-1996 */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
/* Some old EB books don't take an argument. */
if (book->disc_code != EB_DISC_EPWING
&& eb_uint1(cache_p + 2) >= 0x1f)
in_step = 2;
break;
case 0x1c:
if (book->character_code == EB_CHARCODE_JISX0208_GB2312) {
/* beginning of EBXA-C gaiji */
in_step = 2;
hook = hookset->hooks + EB_HOOK_BEGIN_EBXAC_GAIJI;
context->ebxac_gaiji_flag = 1;
} else {
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
/* Some old EB books don't take an argument. */
if (book->disc_code != EB_DISC_EPWING
&& eb_uint1(cache_p + 2) >= 0x1f)
in_step = 2;
}
break;
case 0x1d:
if (book->character_code == EB_CHARCODE_JISX0208_GB2312) {
/* end of EBXA-C gaiji */
in_step = 2;
hook = hookset->hooks + EB_HOOK_END_EBXAC_GAIJI;
context->ebxac_gaiji_flag = 0;
} else {
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
/* Some old EB books don't take an argument. */
if (book->disc_code != EB_DISC_EPWING
&& eb_uint1(cache_p + 2) >= 0x1f)
in_step = 2;
}
break;
case 0x32:
/* beginning of reference to monochrome graphic */
in_step = 2;
argc = 4;
argv[1] = 0;
argv[2] = 0;
argv[3] = 0;
hook = hookset->hooks + EB_HOOK_BEGIN_MONO_GRAPHIC;
break;
case 0x39:
/* beginning of MPEG movie */
in_step = 46;
argc = 6;
argv[1] = eb_uint4(cache_p + 2);
argv[2] = eb_uint4(cache_p + 22);
argv[3] = eb_uint4(cache_p + 26);
argv[4] = eb_uint4(cache_p + 30);
argv[5] = eb_uint4(cache_p + 34);
hook = hookset->hooks + EB_HOOK_BEGIN_MPEG;
break;
case 0x3c:
/* beginning of inline color graphic */
in_step = 20;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 4;
argv[1] = eb_uint2(cache_p + 2);
argv[2] = eb_bcd4(cache_p + 14);
argv[3] = eb_bcd2(cache_p + 18);
if (argv[1] >> 8 == 0x00)
hook = hookset->hooks + EB_HOOK_BEGIN_IN_COLOR_BMP;
else
hook = hookset->hooks + EB_HOOK_BEGIN_IN_COLOR_JPEG;
break;
case 0x35: case 0x36: case 0x37: case 0x38: case 0x3a:
case 0x3b: case 0x3d: case 0x3e: case 0x3f:
in_step = 2;
context->skip_code = eb_uint1(cache_p + 1) + 0x20;
break;
case 0x41:
/* beginning of keyword */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 2;
argv[1] = eb_uint2(cache_p + 2);
if (0 < context->printable_count
&& context->code == EB_TEXT_MAIN_TEXT) {
if (eb_is_stop_code(book, appendix, argv[0], argv[1])) {
context->text_status = EB_TEXT_STATUS_SOFT_STOP;
goto succeeded;
}
}
if (context->auto_stop_code < 0)
context->auto_stop_code = eb_uint2(cache_p + 2);
hook = hookset->hooks + EB_HOOK_BEGIN_KEYWORD;
break;
case 0x42:
/* beginning of reference */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
if (eb_uint1(cache_p + 2) != 0x00)
in_step -= 2;
hook = hookset->hooks + EB_HOOK_BEGIN_REFERENCE;
break;
case 0x43:
/* beginning of an entry of a candidate */
in_step = 2;
if (context->skip_code == SKIP_CODE_NONE) {
context->candidate[0] = '\0';
context->is_candidate = 1;
candidate_length = 0;
candidate_p = (unsigned char *)context->candidate;
}
hook = hookset->hooks + EB_HOOK_BEGIN_CANDIDATE;
break;
case 0x44:
/* beginning of monochrome graphic */
in_step = 12;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 4;
argv[1] = eb_uint2(cache_p + 2);
argv[2] = eb_bcd4(cache_p + 4);
argv[3] = eb_bcd4(cache_p + 8);
if (0 < argv[2] && 0 < argv[3])
hook = hookset->hooks + EB_HOOK_BEGIN_MONO_GRAPHIC;
break;
case 0x45:
/* beginning of graphic block */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
if (eb_uint1(cache_p + 2) != 0x1f) {
argc = 2;
argv[1] = eb_bcd4(cache_p + 2);
} else {
in_step = 2;
}
break;
case 0x4a:
/* beginning of WAVE sound */
in_step = 18;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 6;
argv[1] = eb_uint4(cache_p + 2);
argv[2] = eb_bcd4(cache_p + 6);
argv[3] = eb_bcd2(cache_p + 10);
argv[4] = eb_bcd4(cache_p + 12);
argv[5] = eb_bcd2(cache_p + 16);
hook = hookset->hooks + EB_HOOK_BEGIN_WAVE;
break;
case 0x4b:
/* beginning of paged reference */
in_step = 8;
if (cache_rest_length < in_step + 2) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 3;
argv[1] = eb_bcd4(cache_p + 2);
argv[2] = eb_bcd2(cache_p + 6);
if (cache_p[8]==0x1f && cache_p[9]==0x6b) {
context->text_status = EB_TEXT_STATUS_SOFT_STOP;
hook = hookset->hooks + EB_HOOK_GRAPHIC_REFERENCE;
in_step = 10;
} else {
hook = hookset->hooks + EB_HOOK_BEGIN_GRAPHIC_REFERENCE;
}
break;
case 0x4c:
/* beginning of image page */
in_step = 4;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
hook = hookset->hooks + EB_HOOK_BEGIN_IMAGE_PAGE;
break;
case 0x4d:
/* beginning of color graphic (BMP or JPEG) */
in_step = 20;
if (cache_rest_length < in_step) {
error_code = EB_ERR_UNEXP_TEXT;
goto failed;
}
argc = 4;
argv[1] = eb_uint2(cache_p + 2);
argv[2] = eb_bcd4(cache_p + 14);
argv[3] = eb_bcd2(cache_p + 18);
if (argv[1] >> 8 == 0x00)
hook = hookset->hooks + EB_HOOK_BEGIN_COLOR_BMP;
else
hook = hookset->hooks + EB_HOOK_BEGIN_COLOR_JPEG;
break;
case 0x4f:
/* beginning of clickable area */