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crtw32.c
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crtw32.c
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/* Copyright 2024 Oğuz İsmail Uysal <oguzismailuysal@gmail.com>
*
* This file is part of Rachel.
*
* Rachel 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <https://www.gnu.org/licenses/>.
*/
#include <windows.h>
#undef errno
int errno;
static HANDLE a[3];
#define DELIM(c) ((c) == ' ' || (c) == '\t')
void
_exit(int status) {
ExitProcess(status);
}
static int
unescape(const char **src, volatile char **dst, int quot) {
const char *p;
int i, n;
p = *src;
if (*p == '\\') {
while (*++p == '\\');
if (*p != '"')
return 0;
n = p-*src;
for (i = 0; i < n/2; i++)
*(*dst)++ = '\\';
if (n%2 != 0)
*(*dst)++ = '"';
else
p--;
}
else if (quot && *p == '"') {
for (; *(p+1) == '"'; p++);
if (p == *src)
return 0;
n = p-*src + 2;
for (i = 0; i < n/3; i++)
*(*dst)++ = '"';
if (n%3 != 1)
p--;
}
else {
return 0;
}
*src = p;
return 1;
}
int
mainCRTStartup(void) {
int argc;
char buf[32767];
char *argv[ARRAYSIZE(buf)/2];
const char *p;
char *q;
int quot;
p = GetCommandLineA();
argv[0] = q = buf;
quot = 0;
for (; DELIM(*p); p++);
for (; *p; p++)
if (!quot && DELIM(*p))
break;
else if (*p == '"')
quot = !quot;
else
*q++ = *p;
*q++ = 0;
for (argc = 1; ; argc++) {
for (; DELIM(*p); p++);
if (!*p)
break;
argv[argc] = q;
quot = 0;
for (; *p; p++)
if (!quot && DELIM(*p))
break;
else if (unescape(&p, &q, quot))
continue;
else if (*p == '"')
quot = !quot;
else
*q++ = *p;
*q++ = 0;
}
argv[argc] = 0;
a[0] = GetStdHandle(STD_INPUT_HANDLE);
a[1] = GetStdHandle(STD_OUTPUT_HANDLE);
a[2] = GetStdHandle(STD_ERROR_HANDLE);
_exit(main(argc, argv));
}
int
write(int fd, const void *buf, unsigned count) {
DWORD ret;
if (!buf)
errno = EINVAL;
else if (!count)
return 0;
else if (fd < 0 || fd >= ARRAYSIZE(a))
errno = EBADF;
else if (!a[fd] || a[fd] == INVALID_HANDLE_VALUE)
errno = EBADF;
else if (!WriteFile(a[fd], buf, count, &ret, 0))
switch (GetLastError()) {
case ERROR_ACCESS_DENIED:
errno = EBADF;
break;
case ERROR_DISK_FULL:
errno = ENOSPC;
break;
case ERROR_NO_DATA:
errno = EPIPE;
break;
default:
errno = EINVAL;
}
else if (ret)
return ret;
else
errno = ENOSPC;
return -1;
}