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39bf41f4eb
- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands
92 lines
3.8 KiB
C
92 lines
3.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/intrin/pcmpgtb.h"
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#include "libc/intrin/pmovmskb.h"
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#include "libc/intrin/punpckhbw.h"
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#include "libc/intrin/punpckhwd.h"
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#include "libc/intrin/punpcklbw.h"
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#include "libc/intrin/punpcklwd.h"
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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#include "libc/str/thompike.h"
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#include "libc/str/utf16.h"
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#include "libc/x/x.h"
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/**
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* Transcodes UTF-8 to UTF-32.
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*
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* @param p is input value
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* @param n if -1 implies strlen
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* @param z if non-NULL receives output length
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*/
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wchar_t *utf8toutf32(const char *p, size_t n, size_t *z) {
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size_t i;
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unsigned m, j;
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wint_t x, a, b;
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wchar_t *r, *q;
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uint8_t v1[16], v2[16], v3[16], v4[16], vz[16];
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if (z) *z = 0;
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if (n == -1) n = p ? strlen(p) : 0;
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if ((q = r = malloc(n * sizeof(wchar_t) + sizeof(wchar_t)))) {
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for (i = 0; i < n;) {
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if (i + 16 < n) { /* 10x speedup for ascii */
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bzero(vz, 16);
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do {
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memcpy(v1, p + i, 16);
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pcmpgtb((int8_t *)v2, (int8_t *)v1, (int8_t *)vz);
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if (pmovmskb(v2) != 0xFFFF) break;
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punpcklbw(v3, v1, vz);
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punpckhbw(v1, v1, vz);
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punpcklwd((void *)v4, (void *)v3, (void *)vz);
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punpckhwd((void *)v3, (void *)v3, (void *)vz);
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punpcklwd((void *)v2, (void *)v1, (void *)vz);
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punpckhwd((void *)v1, (void *)v1, (void *)vz);
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memcpy(q + 0, v4, 16);
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memcpy(q + 4, v3, 16);
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memcpy(q + 8, v2, 16);
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memcpy(q + 12, v1, 16);
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i += 16;
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q += 16;
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} while (i + 16 < n);
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}
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x = p[i++] & 0xff;
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if (x >= 0300) {
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a = ThomPikeByte(x);
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m = ThomPikeLen(x) - 1;
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if (i + m <= n) {
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for (j = 0;;) {
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b = p[i + j] & 0xff;
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if (!ThomPikeCont(b)) break;
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a = ThomPikeMerge(a, b);
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if (++j == m) {
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x = a;
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i += j;
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break;
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}
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}
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}
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}
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*q++ = x;
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}
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if (z) *z = q - r;
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*q++ = '\0';
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if ((q = realloc(r, (q - r) * sizeof(wchar_t)))) r = q;
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}
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return r;
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}
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