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1 #include <wctype.h> | 1 #include <wctype.h> |
2 #include "libc.h" | 2 #include "libc.h" |
3 | 3 |
4 /* Consider all legal codepoints as printable except for: | 4 /* Consider all legal codepoints as printable except for: |
5 * - C0 and C1 control characters | 5 * - C0 and C1 control characters |
6 * - U+2028 and U+2029 (line/para break) | 6 * - U+2028 and U+2029 (line/para break) |
7 * - U+FFF9 through U+FFFB (interlinear annotation controls) | 7 * - U+FFF9 through U+FFFB (interlinear annotation controls) |
8 * The following code is optimized heavily to make hot paths for the | 8 * The following code is optimized heavily to make hot paths for the |
9 * expected printable characters. */ | 9 * expected printable characters. */ |
10 | 10 |
11 int iswprint(wint_t wc) | 11 int iswprint(wint_t wc) { |
12 { | 12 if (wc < 0xffU) |
13 » if (wc < 0xffU) | 13 return (wc + 1 & 0x7f) >= 0x21; |
14 » » return (wc+1 & 0x7f) >= 0x21; | 14 if (wc < 0x2028U || wc - 0x202aU < 0xd800 - 0x202a || |
15 » if (wc < 0x2028U || wc-0x202aU < 0xd800-0x202a || wc-0xe000U < 0xfff9-0x
e000) | 15 wc - 0xe000U < 0xfff9 - 0xe000) |
16 » » return 1; | 16 return 1; |
17 » if (wc-0xfffcU > 0x10ffff-0xfffc || (wc&0xfffe)==0xfffe) | 17 if (wc - 0xfffcU > 0x10ffff - 0xfffc || (wc & 0xfffe) == 0xfffe) |
18 » » return 0; | 18 return 0; |
19 » return 1; | 19 return 1; |
20 } | 20 } |
21 | 21 |
22 int __iswprint_l(wint_t c, locale_t l) | 22 int __iswprint_l(wint_t c, locale_t l) { |
23 { | 23 return iswprint(c); |
24 » return iswprint(c); | |
25 } | 24 } |
26 | 25 |
27 weak_alias(__iswprint_l, iswprint_l); | 26 weak_alias(__iswprint_l, iswprint_l); |
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