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ef416fc2 | 1 | //======================================================================== |
2 | // | |
3 | // UTF8.h | |
4 | // | |
5 | // Copyright 2001-2003 Glyph & Cog, LLC | |
6 | // | |
7 | //======================================================================== | |
8 | ||
9 | static int mapUTF8(Unicode u, char *buf, int bufSize) { | |
10 | if (u <= 0x0000007f) { | |
11 | if (bufSize < 1) { | |
12 | return 0; | |
13 | } | |
14 | buf[0] = (char)u; | |
15 | return 1; | |
16 | } else if (u <= 0x000007ff) { | |
17 | if (bufSize < 2) { | |
18 | return 0; | |
19 | } | |
20 | buf[0] = (char)(0xc0 + (u >> 6)); | |
21 | buf[1] = (char)(0x80 + (u & 0x3f)); | |
22 | return 2; | |
23 | } else if (u <= 0x0000ffff) { | |
24 | if (bufSize < 3) { | |
25 | return 0; | |
26 | } | |
27 | buf[0] = (char)(0xe0 + (u >> 12)); | |
28 | buf[1] = (char)(0x80 + ((u >> 6) & 0x3f)); | |
29 | buf[2] = (char)(0x80 + (u & 0x3f)); | |
30 | return 3; | |
31 | } else if (u <= 0x0010ffff) { | |
32 | if (bufSize < 4) { | |
33 | return 0; | |
34 | } | |
35 | buf[0] = (char)(0xf0 + (u >> 18)); | |
36 | buf[1] = (char)(0x80 + ((u >> 12) & 0x3f)); | |
37 | buf[2] = (char)(0x80 + ((u >> 6) & 0x3f)); | |
38 | buf[3] = (char)(0x80 + (u & 0x3f)); | |
39 | return 4; | |
40 | } else { | |
41 | return 0; | |
42 | } | |
43 | } | |
44 | ||
45 | static int mapUCS2(Unicode u, char *buf, int bufSize) { | |
46 | if (u <= 0xffff) { | |
47 | if (bufSize < 2) { | |
48 | return 0; | |
49 | } | |
50 | buf[0] = (char)((u >> 8) & 0xff); | |
51 | buf[1] = (char)(u & 0xff); | |
52 | return 2; | |
53 | } else { | |
54 | return 0; | |
55 | } | |
56 | } |