1
0
Fork 0
forked from len0rd/rockbox
foxbox/firmware/arabjoin.h
Solomon Peachy a2c10f6189 unicode: Support characters beyond the first unicode plane
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
2025-09-12 09:24:30 -04:00

12 lines
428 B
C

/* Note these are not ucschar_t becuase all arabic
codepoints are <16bit, so no need to waste table space */
typedef struct {
unsigned short isolated;
unsigned short final;
unsigned short medial;
unsigned short initial;
} arab_t;
extern const arab_t zwj; /* zero-width joiner */
extern const arab_t lamaleph[]; /* lam-aleph ligatures */
extern const arab_t jointable[]; /* lookup table for arabic joining */