71 lines
3.2 KiB
C
71 lines
3.2 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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│ 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/alg/arraylist2.h"
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#include "libc/calls/hefty/ntspawn.h"
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#include "libc/conv/conv.h"
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#include "libc/macros.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/tpdecode.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Copies sorted environment variable block for Windows.
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*
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* This is designed to meet the requirements of CreateProcess().
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*
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* @param envp is an a NULL-terminated array of UTF-8 strings
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* @return freshly allocated lpEnvironment or NULL w/ errno
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*/
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textwindows char16_t *mkntenvblock(char *const envp[]) {
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size_t block_i = 0;
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size_t block_n = 0;
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char16_t *block_p = NULL;
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size_t i, j;
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if (!(envp = sortenvp(envp))) goto error;
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const char16_t kNul = u'\0';
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for (i = 0; envp[i]; ++i) {
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unsigned consumed;
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for (j = 0;; j += consumed) {
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wint_t wc;
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char16_t cbuf[2];
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consumed = abs(tpdecode(&envp[i][j], &wc));
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if (CONCAT(&block_p, &block_i, &block_n, cbuf,
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abs(pututf16(cbuf, ARRAYLEN(cbuf), wc, false))) == -1) {
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goto error;
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}
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if (!wc) break;
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}
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}
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if (APPEND(&block_p, &block_i, &block_n, &kNul) == -1) {
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goto error;
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}
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if (block_i > ENV_MAX) {
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e2big();
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goto error;
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}
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free(envp);
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return block_p;
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error:
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free(envp);
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free(block_p);
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return NULL;
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}
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