312 lines
8.3 KiB
C
312 lines
8.3 KiB
C
/*
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* Copyright (c) 1997-2006 Motoyuki Kasahara
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "build-pre.h"
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#include "eb.h"
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#include "error.h"
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#include "appendix.h"
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#include "text.h"
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#include "build-post.h"
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/*
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* Default hookset.
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*/
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EB_Hookset eb_default_hookset;
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/*
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* Initialize default hookset.
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*/
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void
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eb_initialize_default_hookset(void)
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{
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LOG(("in: eb_initialize_default_hookset()"));
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eb_initialize_hookset(&eb_default_hookset);
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LOG(("out: eb_initialize_default_hookset()"));
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}
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/*
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* Initialize a hookset.
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*/
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void
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eb_initialize_hookset(EB_Hookset *hookset)
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{
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int i;
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LOG(("in: eb_initialize_hookset()"));
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for (i = 0; i < EB_NUMBER_OF_HOOKS; i++) {
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hookset->hooks[i].code = i;
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hookset->hooks[i].function = NULL;
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}
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hookset->hooks[EB_HOOK_NARROW_JISX0208].function
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= eb_hook_euc_to_ascii;
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hookset->hooks[EB_HOOK_NARROW_FONT].function
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= eb_hook_narrow_character_text;
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hookset->hooks[EB_HOOK_WIDE_FONT].function
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= eb_hook_wide_character_text;
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hookset->hooks[EB_HOOK_NEWLINE].function
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= eb_hook_newline;
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LOG(("out: eb_initialize_hookset()"));
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}
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/*
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* Finalize a hookset.
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*/
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void
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eb_finalize_hookset(EB_Hookset *hookset)
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{
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int i;
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LOG(("in: eb_finalize_hookset()"));
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for (i = 0; i < EB_NUMBER_OF_HOOKS; i++) {
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hookset->hooks[i].code = i;
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hookset->hooks[i].function = NULL;
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}
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LOG(("out: eb_finalize_hookset()"));
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}
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/*
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* Set a hook.
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*/
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EB_Error_Code
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eb_set_hook(EB_Hookset *hookset, const EB_Hook *hook)
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{
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EB_Error_Code error_code;
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LOG(("in: eb_set_hook(hook=%d)", (int)hook->code));
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/*
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* Set a hook.
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*/
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if (hook->code < 0 || EB_NUMBER_OF_HOOKS <= hook->code) {
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error_code = EB_ERR_NO_SUCH_HOOK;
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goto failed;
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}
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hookset->hooks[hook->code].function = hook->function;
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LOG(("out: eb_set_hook() = %s", eb_error_string(EB_SUCCESS)));
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return EB_SUCCESS;
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/*
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* An error occurs...
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*/
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failed:
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LOG(("out: eb_set_hook() = %s", eb_error_string(error_code)));
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return error_code;
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}
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/*
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* Set a list of hooks.
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*/
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EB_Error_Code
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eb_set_hooks(EB_Hookset *hookset, const EB_Hook *hook)
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{
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EB_Error_Code error_code;
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const EB_Hook *h;
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LOG(("in: eb_set_hooks(hooks=[below])"));
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if (eb_log_flag) {
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for (h = hook; h->code != EB_HOOK_NULL; h++)
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LOG((" hook=%d", h->code));
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}
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/*
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* Set hooks.
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*/
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for (h = hook; h->code != EB_HOOK_NULL; h++) {
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if (h->code < 0 || EB_NUMBER_OF_HOOKS <= h->code) {
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error_code = EB_ERR_NO_SUCH_HOOK;
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goto failed;
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}
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hookset->hooks[h->code].function = h->function;
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}
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/*
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* Unlock the hookset.
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*/
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LOG(("out: eb_set_hooks() = %s", eb_error_string(EB_SUCCESS)));
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return EB_SUCCESS;
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/*
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* An error occurs...
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*/
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failed:
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LOG(("out: eb_set_hooks() = %s", eb_error_string(error_code)));
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return error_code;
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}
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/*
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* EUC JP to ASCII conversion table.
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*/
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#define EUC_TO_ASCII_TABLE_START 0xa0
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#define EUC_TO_ASCII_TABLE_END 0xff
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static const unsigned char euc_a1_to_ascii_table[] = {
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0x00, 0x20, 0x00, 0x00, 0x2c, 0x2e, 0x00, 0x3a, /* 0xa0 */
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0x3b, 0x3f, 0x21, 0x00, 0x00, 0x00, 0x60, 0x00, /* 0xa8 */
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0x5e, 0x7e, 0x5f, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d, 0x2f, /* 0xb8 */
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0x5c, 0x00, 0x00, 0x7c, 0x00, 0x00, 0x00, 0x27, /* 0xc0 */
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0x00, 0x22, 0x28, 0x29, 0x00, 0x00, 0x5b, 0x5d, /* 0xc8 */
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0x7b, 0x7d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0 */
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0x00, 0x00, 0x00, 0x00, 0x2b, 0x2d, 0x00, 0x00, /* 0xd8 */
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0x00, 0x3d, 0x00, 0x3c, 0x3e, 0x00, 0x00, 0x00, /* 0xe0 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5c, /* 0xe8 */
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0x24, 0x00, 0x00, 0x25, 0x23, 0x26, 0x2a, 0x40, /* 0xf0 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xf8 */
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};
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static const unsigned char euc_a3_to_ascii_table[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8 */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0xb0 */
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0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8 */
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0x00, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0xc0 */
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0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0xc8 */
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0xd0 */
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0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8 */
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0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0xe0 */
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0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0xe8 */
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0xf0 */
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0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xf8 */
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};
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/*
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* Hook which converts a character from EUC-JP to ASCII.
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*/
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EB_Error_Code
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eb_hook_euc_to_ascii(EB_Book *book, EB_Appendix *appendix, void *container,
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EB_Hook_Code hook_code, int argc, const unsigned int *argv)
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{
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int in_code1, in_code2;
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int out_code = 0;
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in_code1 = argv[0] >> 8;
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in_code2 = argv[0] & 0xff;
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if (in_code2 < EUC_TO_ASCII_TABLE_START
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|| EUC_TO_ASCII_TABLE_END < in_code2) {
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out_code = 0;
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} else if (in_code1 == 0xa1) {
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out_code = euc_a1_to_ascii_table[in_code2 - EUC_TO_ASCII_TABLE_START];
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} else if (in_code1 == 0xa3) {
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out_code = euc_a3_to_ascii_table[in_code2 - EUC_TO_ASCII_TABLE_START];
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}
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if (out_code == 0)
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eb_write_text_byte2(book, in_code1, in_code2);
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else
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eb_write_text_byte1(book, out_code);
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return EB_SUCCESS;
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}
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/*
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* Hook for narrow local character.
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*/
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EB_Error_Code
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eb_hook_narrow_character_text(EB_Book *book, EB_Appendix *appendix,
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void *container, EB_Hook_Code hook_code, int argc,
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const unsigned int *argv)
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{
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char alt_text[EB_MAX_ALTERNATION_TEXT_LENGTH + 1];
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if (appendix == NULL
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|| eb_narrow_alt_character_text(appendix, (int)argv[0], alt_text)
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!= EB_SUCCESS) {
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eb_write_text_string(book, "<?>");
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} else {
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eb_write_text_string(book, alt_text);
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}
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return EB_SUCCESS;
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}
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/*
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* Hook for wide local character.
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*/
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EB_Error_Code
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eb_hook_wide_character_text(EB_Book *book, EB_Appendix *appendix,
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void *container, EB_Hook_Code hook_code, int argc,
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const unsigned int *argv)
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{
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char alt_text[EB_MAX_ALTERNATION_TEXT_LENGTH + 1];
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if (appendix == NULL
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|| eb_wide_alt_character_text(appendix, (int)argv[0], alt_text)
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!= EB_SUCCESS) {
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eb_write_text_string(book, "<?>");
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} else {
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eb_write_text_string(book, alt_text);
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}
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return EB_SUCCESS;
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}
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/*
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* Hook for a newline character.
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*/
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EB_Error_Code
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eb_hook_newline(EB_Book *book, EB_Appendix *appendix, void *container,
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EB_Hook_Code code, int argc, const unsigned int *argv)
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{
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eb_write_text_byte1(book, '\n');
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return EB_SUCCESS;
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}
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/*
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* Hook which does nothing.
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*/
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EB_Error_Code
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eb_hook_empty(EB_Book *book, EB_Appendix *appendix, void *container,
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EB_Hook_Code hook_code, int argc, const unsigned int *argv)
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{
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return EB_SUCCESS;
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}
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