mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
50 lines
2.7 KiB
C
50 lines
2.7 KiB
C
/*-*- 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 2020 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/runtime/runtime.h"
|
|
#include "libc/str/str.h"
|
|
|
|
/**
|
|
* Transcodes NT environment variable block from UTF-16 to UTF-8.
|
|
*
|
|
* @param env is a double NUL-terminated block of key=values
|
|
* @param buf is the new environment which gets double-nul'd
|
|
* @param size is the byte capacity of buf
|
|
* @param envp stores NULL-terminated string pointer list (optional)
|
|
* @param max is the pointer count capacity of envp
|
|
* @return number of variables decoded, excluding NULL-terminator
|
|
*/
|
|
textwindows int GetDosEnviron(const char16_t *env, char *buf, size_t size,
|
|
char **envp, size_t max) {
|
|
int i;
|
|
axdx_t r;
|
|
i = 0;
|
|
if (size) {
|
|
--size;
|
|
while (*env) {
|
|
if (i + 1 < max) envp[i++] = buf;
|
|
r = tprecode16to8(buf, size, env);
|
|
size -= r.ax + 1;
|
|
buf += r.ax + 1;
|
|
env += r.dx;
|
|
}
|
|
*buf = '\0';
|
|
}
|
|
if (i < max) envp[i] = NULL;
|
|
return i;
|
|
}
|