52 lines
2.8 KiB
C
52 lines
2.8 KiB
C
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/*-*- 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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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/**
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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 int GetDosEnviron(const char16_t *env, 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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if (size) {
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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 = tprecode16to8(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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*buf = '\0';
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}
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if (i < max) envp[i] = NULL;
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return i;
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}
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