mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-02 10:42:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Delete old wcwidth() implementation

Browse source 
This shaves away 144kb of bss memory from every binary linking printf at
the expense of slightly increased binary footprint. Kudos for Byron Lai.
This commit is contained in:
Justine Tunney 2023-10-14 03:06:11 -07:00
parent 2db2f40a98
commit a657f3e878
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
15 changed files with 11 additions and 814 deletions
Download patch file Download diff file Expand all files Collapse all files

24
libc/str/wcwidth.c
View file

@ -21,33 +21,10 @@
#include "libc/str/unicode.h"
#include "libc/str/wcwidth_osx.internal.h"
extern const uint8_t kEastAsianWidth[];
extern const uint32_t kEastAsianWidthBits;
extern const uint8_t kCombiningChars[];
extern const uint32_t kCombiningCharsBits;
/**
* Returns cell width of monospace character.
*/
int wcwidth(wchar_t c) {
#if defined(__x86_64__) && !defined(__chibicc__)
if (LIKELY(32 <= c && c < 127)) {
return 1;
} else if (!c) {
return 0;
} else if ((uint32_t)c > 0x10FFFD || //
(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;
}
#else
int res;
if (LIKELY(32 <= c && c < 127)) return 1;
if (VERY_UNLIKELY((uint32_t)c >= 0x100000)) {
@ -60,5 +37,4 @@ int wcwidth(wchar_t c) {
if (iswcntrl(c)) return -1;
}
return res;
#endif
}