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a2c10f6189
We used 16-bit variables to store the 'character code' everywhere but this won't let us represent anything beyond U+FFFF. This patch changes those variables to a custom type that can be 32 or 16 bits depending on the build, and adjusts numerous internal APIs and datastructures to match. This includes: * utf8decode() and friends * font manipulation, caching, rendering, and generation * on-screen keyboard * FAT filesystem (parsing and generating utf16 LFNs) * WIN32 simulator platform code Note that this patch doesn't _enable_ >16bit unicode support; a followup patch will turn that on for appropriate targets. Appears to work on: * hosted linux, native, linux simulator in both 16/32-bit modes. Needs testing on: * windows and macos simulator (16bit+32bit) Change-Id: Iba111b27d2433019b6bff937cf1ebd2c4353a0e8
67 lines
2 KiB
C
67 lines
2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2020 William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#include "kbd_helper.h"
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/* USAGE:
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ucschar_t kbd[64];
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ucschar_t *kbd_p = kbd;
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if (!kbd_create_layout("ABCD1234\n", kbd, sizeof(kbd)))
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kbd_p = NULL;
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rb->kbd_input(buf,sizeof(buf), kbd_p);
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*/
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/* create a custom keyboard layout for kbd_input
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* success returns size of buffer used
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* failure returns 0
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*/
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int kbd_create_layout(const char *layout, ucschar_t *buf, int bufsz)
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{
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ucschar_t *pbuf;
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const unsigned char *p = layout;
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int len = 0;
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int total_len = 0;
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pbuf = buf;
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while (*p && (pbuf - buf + (ptrdiff_t) sizeof(ucschar_t)) < bufsz)
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{
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p = rb->utf8decode(p, &pbuf[len+1]);
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if (pbuf[len+1] == '\n')
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{
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*pbuf = len;
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pbuf += len+1;
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total_len += len + 1;
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len = 0;
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}
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else
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len++;
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}
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if (len+1 < bufsz)
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{
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*pbuf = len;
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pbuf[len+1] = 0xFEFF; /* mark end of characters */
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total_len += len + 1;
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return total_len * sizeof(ucschar_t);
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}
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return 0;
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}
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