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Add q keyboard shortcut to printvideo.com (#37)

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This commit is contained in:
Justine Tunney 2021-02-03 15:53:33 -08:00
parent 4e56d89dcd
commit 28135b7a20
7 changed files with 33 additions and 24 deletions
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20
libc/unicode/wcwidth.c
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@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/likely.h"
#include "libc/unicode/unicode.h"
extern const uint8_t kEastAsianWidth[];
@ -26,15 +27,18 @@ extern const uint32_t kCombiningCharsBits;
/**
* Returns cell width of monospace character.
*/
int wcwidth(wchar_t ucs) {
if (ucs == 0) return 0;
if ((0 <= ucs && ucs < 32) || (0x7f <= ucs && ucs < 0xA0)) {
return -1;
} else if ((0 <= ucs && ucs < kCombiningCharsBits) &&
!!(kCombiningChars[ucs >> 3] & (1 << (ucs & 7)))) {
int wcwidth(wchar_t c) {
if (LIKELY(32 <= c && c < 127)) {
return 1;
} else if (!c) {
return 0;
} else if (0 <= ucs && ucs < kEastAsianWidthBits) {
return 1 + !!(kEastAsianWidth[ucs >> 3] & (1 << (ucs & 7)));
} else if ((0 < c && c < 32) || (0x7f <= c && c < 0xA0)) {
return -1;
} else if ((0 <= c && c < kCombiningCharsBits) &&
!!(kCombiningChars[c >> 3] & (1 << (c & 7)))) {
return 0;
} else if (0 <= c && c < kEastAsianWidthBits) {
return 1 + !!(kEastAsianWidth[c >> 3] & (1 << (c & 7)));
} else {
return 1;
}