blob: 077d58d32fd6f03f4ad8f8b3d73e3d6559c58f8d
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Unicode support routines. |
4 | * |
5 | * Copyright (C) 2010 Denys Vlasenko |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this source tree. |
8 | */ |
9 | #include "libbb.h" |
10 | #include "unicode.h" |
11 | |
12 | const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str) |
13 | { |
14 | char *dst; |
15 | const char *s; |
16 | |
17 | s = str; |
18 | while (1) { |
19 | unsigned char c = *s; |
20 | if (c == '\0') { |
21 | /* 99+% of inputs do not need conversion */ |
22 | if (stats) { |
23 | stats->byte_count = (s - str); |
24 | stats->unicode_count = (s - str); |
25 | stats->unicode_width = (s - str); |
26 | } |
27 | return str; |
28 | } |
29 | if (c < ' ') |
30 | break; |
31 | if (c >= 0x7f) |
32 | break; |
33 | s++; |
34 | } |
35 | |
36 | #if ENABLE_UNICODE_SUPPORT |
37 | dst = unicode_conv_to_printable(stats, str); |
38 | #else |
39 | { |
40 | char *d = dst = xstrdup(str); |
41 | while (1) { |
42 | unsigned char c = *d; |
43 | if (c == '\0') |
44 | break; |
45 | if (c < ' ' || c >= 0x7f) |
46 | *d = '?'; |
47 | d++; |
48 | } |
49 | if (stats) { |
50 | stats->byte_count = (d - dst); |
51 | stats->unicode_count = (d - dst); |
52 | stats->unicode_width = (d - dst); |
53 | } |
54 | } |
55 | #endif |
56 | return auto_string(dst); |
57 | } |
58 |