mirror of
https://github.com/jart/cosmopolitan.git
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b45d50b690
- Fix build flakes - Polyfill SIGWINCH on Windows - Fix an execve issue on Windows - Make strerror show more information - Improve cmd.exe setup/teardown on Windows - Support bracketed paste mode in Blinkenlights - Show keyboard shortcuts in Blinkenlights status bar - Fixed copy_file_range() and copyfile() w/ zip filesystem - Size optimize GetDosArgv() to keep life.com 12kb in size - Improve Blinkenlights ability to load weird ELF executables - Fix program_executable_name and add GetInterpreterExecutableName - Make Python in tiny mode fail better if docstrings are requested - Update Python test exclusions in tiny* modes such as tinylinux - Add bulletproof unbreakable kprintf() troubleshooting function - Remove "oldskool" keyword from ape.S for virus scanners - Fix issue that caused backtraces to not print sometimes - Improve Blinkenlights serial uart character i/o - Make clock_gettime() not clobber errno on xnu - Improve sha256 cpuid check for old computers - Integrate some bestline linenoise fixes - Show runit process names better in htop - Remove SIGPIPE from ShowCrashReports() - Make realpath() not clobber errno - Avoid attaching GDB on non-Linux - Improve img.com example
80 lines
3.5 KiB
C
80 lines
3.5 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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#define ToUpper(c) ((c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
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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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bool v;
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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 (v = r.ax = 0, r.dx = 0;;) {
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if (!(x = src[r.dx++])) break;
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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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if (!v) {
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if (x == '=') {
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v = true;
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} else {
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x = ToUpper(x);
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}
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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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