blob: a7dfe66e14f5fa35f868501e38778ca6e2cfb0ad (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#ifndef TERM_UNICODE_WIDTH_H
#define TERM_UNICODE_WIDTH_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
struct unicode_range { uint32_t lo, hi; };
#include "unicode_data.inc"
static inline bool in_ranges(const struct unicode_range *ranges, size_t count, uint32_t cp)
{
if (count == 0 || cp < ranges[0].lo || cp > ranges[count - 1].hi)
return false;
const struct unicode_range *base = ranges;
size_t n = count;
while (n > 1) {
size_t half = n / 2;
base = (base[half].lo <= cp) ? base + half : base;
n -= half;
}
return cp <= base->hi;
}
#define IN_TABLE(table, cp) in_ranges(table, sizeof(table) / sizeof(table[0]), cp)
static inline int unicode_width(uint32_t cp)
{
if (cp > 0x10FFFF || IN_TABLE(nonprintable, cp))
return -1;
if (IN_TABLE(zero_width, cp))
return 0;
return IN_TABLE(unicode_wide, cp) ? 2 : 1;
}
static inline bool unicode_extended_pictographic(uint32_t cp)
{
return IN_TABLE(extended_pictographic, cp);
}
static inline bool unicode_emoji_presentation(uint32_t cp)
{
return IN_TABLE(emoji_presentation, cp);
}
static inline bool unicode_spacing_mark(uint32_t cp)
{
if (cp < 0x903 || ((cp - 0xABEDu) < (0x11000u - 0xABEDu)) || cp > 0x1D281)
return false;
return IN_TABLE(spacing_mark, cp);
}
#undef IN_TABLE
#endif
|
