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Do some string library work

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This commit is contained in:
Justine Tunney 2022-08-20 21:36:07 -07:00
parent 83d41e4588
commit 35203c0551
42 changed files with 1381 additions and 136 deletions
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2
libc/x/utf16toutf8.c → libc/x/utf16to8.c
View file

@ -41,7 +41,7 @@ static const int16_t kDel16[8] = {127, 127, 127, 127, 127, 127, 127, 127};
* @param n if -1 implies strlen
* @param z if non-NULL receives output length
*/
char *utf16toutf8(const char16_t *p, size_t n, size_t *z) {
char *utf16to8(const char16_t *p, size_t n, size_t *z) {
char *r, *q;
wint_t x, y;
unsigned m, j, w;

51
libc/x/utf32to8.c Normal file
View file

@ -0,0 +1,51 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "libc/str/tpenc.h"
#include "libc/x/x.h"
/**
* Transcodes UTF-32 to UTF-8.
*
* @param p is input value
* @param n if -1 implies wcslen
* @param z if non-NULL receives output length
*/
char *utf32to8(const wchar_t *p, size_t n, size_t *z) {
size_t i;
wint_t x;
uint64_t w;
char *r, *q;
if (z) *z = 0;
if (n == -1) n = p ? wcslen(p) : 0;
if ((q = r = malloc(n * 6 + 1))) {
for (i = 0; i < n; ++i) {
x = p[i];
w = tpenc(x);
do {
*q++ = w;
} while ((w >>= 8));
}
if (z) *z = q - r;
*q++ = '\0';
if ((q = realloc(r, q - r))) r = q;
}
return r;
}

2
libc/x/utf8toutf16.c → libc/x/utf8to16.c
View file

@ -29,7 +29,7 @@
* @param n if -1 implies strlen
* @param z if non-NULL receives output length
*/
char16_t *utf8toutf16(const char *p, size_t n, size_t *z) {
char16_t *utf8to16(const char *p, size_t n, size_t *z) {
size_t i;
wint_t x, a, b;
char16_t *r, *q;

7
libc/x/utf8toutf32.c → libc/x/utf8to32.c
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/likely.h"
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pmovmskb.h"
#include "libc/intrin/punpckhbw.h"
@ -35,7 +36,8 @@
* @param n if -1 implies strlen
* @param z if non-NULL receives output length
*/
wchar_t *utf8toutf32(const char *p, size_t n, size_t *z) {
wchar_t *utf8to32(const char *p, size_t n, size_t *z) {
int e;
size_t i;
unsigned m, j;
wint_t x, a, b;
@ -45,7 +47,8 @@ wchar_t *utf8toutf32(const char *p, size_t n, size_t *z) {
if (n == -1) n = p ? strlen(p) : 0;
if ((q = r = malloc(n * sizeof(wchar_t) + sizeof(wchar_t)))) {
for (i = 0; i < n;) {
if (i + 16 < n) { /* 10x speedup for ascii */
if (!((uintptr_t)(p + i) & 15) && i + 16 < n) {
/* 10x speedup for ascii */
bzero(vz, 16);
do {
memcpy(v1, p + i, 16);

7
libc/x/x.h
View file

@ -52,10 +52,11 @@ char *xstrmul(const char *, size_t) paramsnonnull((1)) _XMAL;
char *xinet_ntop(int, const void *) _XPNN _XMAL;
void *xunbinga(size_t, const char16_t *) attributeallocalign((1)) _XMAL _XRET;
void *xunbing(const char16_t *) _XMAL _XRET;
char16_t *utf8toutf16(const char *, size_t, size_t *) dontdiscard;
char *utf16toutf8(const char16_t *, size_t, size_t *) dontdiscard;
wchar_t *utf8toutf32(const char *, size_t, size_t *) dontdiscard;
char16_t *utf8to16(const char *, size_t, size_t *) dontdiscard;
char *utf16to8(const char16_t *, size_t, size_t *) dontdiscard;
wchar_t *utf8to32(const char *, size_t, size_t *) dontdiscard;
wchar_t *utf16to32(const char16_t *, size_t, size_t *) dontdiscard;
char *utf32to8(const wchar_t *, size_t, size_t *) dontdiscard;
char *xhomedir(void) dontdiscard;
char *xstripext(const char *) dontdiscard;
char *xstripexts(const char *) dontdiscard;