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unicode: Support characters beyond the first unicode plane

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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
This commit is contained in:
Solomon Peachy 2024-12-17 08:55:21 -05:00
parent 2a88253426
commit a2c10f6189
44 changed files with 476 additions and 330 deletions
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10
apps/plugins/frotz/frotz.c
View file

@ -128,7 +128,7 @@ void wait_for_key()
case PLA_EXIT:
hot_key_quit();
break;
case PLA_SELECT:
return;
}
@ -159,7 +159,7 @@ zchar do_input(int timeout, bool show_cursor)
{
case PLA_EXIT:
return ZC_HKEY_QUIT;
case PLA_CANCEL:
menu_ret = menu();
if (menu_ret != ZC_BAD)
@ -174,7 +174,7 @@ zchar do_input(int timeout, bool show_cursor)
return ZC_BAD;
default:
if (timeout != TIMEOUT_BLOCK &&
if (timeout != TIMEOUT_BLOCK &&
!TIME_BEFORE(*rb->current_tick, timeout_at))
return ZC_TIME_OUT;
}
@ -185,7 +185,7 @@ zchar os_read_key(int timeout, bool show_cursor)
{
int r;
char inputbuf[5];
short key;
ucschar_t key;
zchar zkey;
for(;;)
@ -214,7 +214,7 @@ zchar os_read_line(int max, zchar *buf, int timeout, int width, int continued)
char inputbuf[256];
const char *in;
char *out;
short key;
ucschar_t key;
zchar zkey;
for(;;)