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/*-*- 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 │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/alg/arraylist2.h"
#include "libc/calls/calls.h"
#include "libc/calls/hefty/ntspawn.h"
#include "libc/conv/conv.h"
#include "libc/macros.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/hascharacter.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/str/tpdecode.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/errfuns.h"
#define APPENDCHAR(C) \
do { \
if (mkntcmdline_append(&cmdline_p, &cmdline_i, &cmdline_n, C) == -1) { \
goto error; \
} \
} while (0)
static int mkntcmdline_append(char16_t **p, size_t *i, size_t *n, char16_t c) {
return APPEND(p, i, n, &c);
}
/**
* Converts System V argv to Windows-style command line.
*
* Escaping is performed and it's designed to round-trip with
* GetDosArgv() or GetDosArgv(). This function does NOT escape
* command interpreter syntax, e.g. $VAR (sh), %VAR% (cmd).
*
* @param argv is an a NULL-terminated array of UTF-8 strings
* @return freshly allocated lpCommandLine or NULL w/ errno
* @kudos Daniel Colascione for teaching how to quote
* @see libc/runtime/dosargv.c
*/
hidden textwindows nodiscard char16_t *mkntcmdline(char *const argv[]) {
wint_t wc;
size_t i, j;
char16_t cbuf[2];
char16_t *cmdline_p = NULL;
size_t cmdline_i = 0;
size_t cmdline_n = 0;
if (argv[0]) {
for (i = 0; argv[i]; ++i) {
if (i) APPENDCHAR(u' ');
bool needsquote = !argv[i] || !!argv[i][strcspn(argv[i], " \t\n\v\"")];
if (needsquote) APPENDCHAR(u'"');
for (j = 0;;) {
if (needsquote) {
int slashes = 0;
while (argv[i][j] && argv[i][j] == u'\\') slashes++, j++;
slashes <<= 1;
if (argv[i][j] == u'"') slashes++;
while (slashes--) APPENDCHAR(u'\\');
}
if (!argv[i][j]) break;
j += abs(tpdecode(&argv[i][j], &wc));
if (CONCAT(&cmdline_p, &cmdline_i, &cmdline_n, cbuf,
abs(pututf16(cbuf, ARRAYLEN(cbuf), wc, false))) == -1) {
goto error;
}
}
if (needsquote) APPENDCHAR(u'"');
}
APPENDCHAR(u'\0');
if (cmdline_i > CMD_MAX) {
e2big();
goto error;
}
} else {
einval();
}
return cmdline_p;
error:
free(cmdline_p);
return NULL;
}
#undef APPENDCHAR