99 lines
4.4 KiB
C
99 lines
4.4 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.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/hefty/ntspawn.h"
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#include "libc/fmt/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/nexgen32e/hascharacter.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/oldutf16.internal.h"
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#include "libc/str/str.h"
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#include "libc/str/tpdecode.internal.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/errfuns.h"
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#define APPENDCHAR(C) \
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do { \
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if (mkntcmdline_append(&cmdline_p, &cmdline_i, &cmdline_n, C) == -1) { \
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goto error; \
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} \
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} while (0)
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static int mkntcmdline_append(char16_t **p, size_t *i, size_t *n, char16_t c) {
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return APPEND(p, i, n, &c);
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}
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/**
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* Converts System V argv to Windows-style command line.
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*
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* Escaping is performed and it's designed to round-trip with
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* GetDosArgv() or GetDosArgv(). This function does NOT escape
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* command interpreter syntax, e.g. $VAR (sh), %VAR% (cmd).
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*
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* @param argv is an a NULL-terminated array of UTF-8 strings
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* @return freshly allocated lpCommandLine or NULL w/ errno
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* @kudos Daniel Colascione for teaching how to quote
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* @see libc/runtime/dosargv.c
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*/
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hidden textwindows nodiscard char16_t *mkntcmdline(char *const argv[]) {
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wint_t wc;
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size_t i, j;
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char16_t cbuf[2];
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char16_t *cmdline_p = NULL;
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size_t cmdline_i = 0;
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size_t cmdline_n = 0;
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if (argv[0]) {
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for (i = 0; argv[i]; ++i) {
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if (i) APPENDCHAR(u' ');
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bool needsquote = !argv[i] || !!argv[i][strcspn(argv[i], " \t\n\v\"")];
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if (needsquote) APPENDCHAR(u'"');
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for (j = 0;;) {
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if (needsquote) {
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int slashes = 0;
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while (argv[i][j] && argv[i][j] == u'\\') slashes++, j++;
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slashes <<= 1;
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if (argv[i][j] == u'"') slashes++;
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while (slashes--) APPENDCHAR(u'\\');
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}
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if (!argv[i][j]) break;
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j += abs(tpdecode(&argv[i][j], &wc));
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if (CONCAT(&cmdline_p, &cmdline_i, &cmdline_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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}
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if (needsquote) APPENDCHAR(u'"');
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}
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APPENDCHAR(u'\0');
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if (cmdline_i > CMD_MAX) {
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e2big();
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goto error;
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}
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} else {
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einval();
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}
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return cmdline_p;
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error:
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free(cmdline_p);
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return NULL;
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}
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