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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
71 lines
3.3 KiB
C
71 lines
3.3 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 2020 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/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/str/tpenc.h"
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#include "libc/str/utf16.h"
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static textwindows noasan noinstrument axdx_t Recode16to8(char *dst,
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size_t dstsize,
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const char16_t *src) {
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axdx_t r;
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uint64_t w;
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wint_t x, y;
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for (r.ax = 0, r.dx = 0;;) {
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if (!(x = src[r.dx++])) break;
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if (IsUtf16Cont(x)) continue;
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if (!IsUcs2(x)) {
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y = src[r.dx++];
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x = MergeUtf16(x, y);
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}
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w = tpenc(x);
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do {
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if (r.ax + 1 >= dstsize) break;
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dst[r.ax++] = w;
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} while ((w >>= 8));
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}
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return r;
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}
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/**
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* Transcodes NT environment variable block from UTF-16 to UTF-8.
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*
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* @param env is a double NUL-terminated block of key=values
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* @param buf is the new environment which gets double-nul'd
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* @param size is the byte capacity of buf
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* @param envp stores NULL-terminated string pointer list (optional)
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* @param max is the pointer count capacity of envp
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* @return number of variables decoded, excluding NULL-terminator
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*/
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textwindows noasan noinstrument int GetDosEnviron(const char16_t *env,
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char *buf, size_t size,
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char **envp, size_t max) {
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int i;
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axdx_t r;
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i = 0;
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--size;
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while (*env) {
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if (i + 1 < max) envp[i++] = buf;
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r = Recode16to8(buf, size, env);
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size -= r.ax + 1;
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buf += r.ax + 1;
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env += r.dx;
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}
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return i;
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}
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