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- Introduce ualarm() function
- Make rename() report EISEMPTY on Windows
- Always raise EINVAL upon open(O_RDONLY|O_TRUNC)
- Add macro so ./configure will detect SOCK_CLOEXEC
- Fix O_TRUNC without O_CREAT not working on Windows
- Let fcntl(F_SETFL) change O_APPEND status on Windows
- Make sure pwrite() / pread() report ESPIPE on sockets
- Raise ESPIPE on Windows when pwrite() is used on pipe
- Properly compute O_APPEND CreateFile() flags on Windows
- Don't require O_DIRECTORY to open directories on Windows
- Fix more instances of Windows reporting EISDIR and ENOTDIR
- Normalize EFTYPE and EMLINK to ELOOP on NetBSD and FreeBSD
- Make unlink() / rmdir() work on read-only files on Windows
- Validate UTF-8 on Windows paths to fix bug with overlong NUL
- Always print signal name to stderr when crashing due to SIG_DFL
- Fix Windows bug where denormalized paths >260 chars didn't work
- Block signals on BSDs when thread exits before trashing its own stack
This commit is contained in:
Justine Tunney 2023-08-21 02:28:24 -07:00
parent ec957491ea
commit ebf784d4f5
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
76 changed files with 1019 additions and 568 deletions
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13
libc/str/isutf8.c
View file

@ -21,8 +21,6 @@
#include "libc/intrin/likely.h"
#include "libc/str/str.h"
typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
static const char kUtf8Dispatch[] = {
0, 0, 1, 1, 1, 1, 1, 1, // 0300 utf8-2
1, 1, 1, 1, 1, 1, 1, 1, // 0310
@ -37,10 +35,10 @@ static const char kUtf8Dispatch[] = {
/**
* Returns true if text is utf-8.
*
* _isutf8 n=0 1 nanoseconds
* _isutf8 n=5 661 ps/byte 1,476 mb/s
* _isutf8 ascii n=22851 26 ps/byte 35 GB/s
* _isutf8 unicode n=3193 543 ps/byte 1,795 mb/s
* isutf8 n=0 1 nanoseconds
* isutf8 n=5 661 ps/byte 1,476 mb/s
* isutf8 ascii n=22851 26 ps/byte 35 GB/s
* isutf8 unicode n=3193 543 ps/byte 1,795 mb/s
*
* This function considers all ASCII characters including NUL to be
* valid UTF-8. The conditions for something not being valid are:
@ -51,7 +49,7 @@ static const char kUtf8Dispatch[] = {
*
* @param size if -1 implies strlen
*/
dontasan bool _isutf8(const void *data, size_t size) {
dontasan bool isutf8(const void *data, size_t size) {
long c;
unsigned m;
const char *p, *e;
@ -61,6 +59,7 @@ dontasan bool _isutf8(const void *data, size_t size) {
e = p + size;
while (p < e) {
#if defined(__x86_64__) && !defined(__chibicc__)
typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(16)));
if (!((intptr_t)p & 15)) {
for (;;) {
if ((m = __builtin_ia32_pmovmskb128(*(xmm_t *)p >= (xmm_t){0}) ^