virtualx-engine/thirdparty/libwebsockets/lib/plat/windows/windows-file.c

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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2018 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#endif
#include "core/private.h"
int lws_plat_apply_FD_CLOEXEC(int n)
{
return 0;
}
lws_fop_fd_t
_lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
const char *vpath, lws_fop_flags_t *flags)
{
HANDLE ret;
WCHAR buf[MAX_PATH];
lws_fop_fd_t fop_fd;
FILE_STANDARD_INFO fInfo = {0};
MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, LWS_ARRAY_SIZE(buf));
#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0602 // Windows 8 (minimum when UWP_ENABLED, but can be used in Windows builds)
CREATEFILE2_EXTENDED_PARAMETERS extParams = {0};
extParams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL;
if (((*flags) & 7) == _O_RDONLY) {
ret = CreateFile2(buf, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, &extParams);
} else {
ret = CreateFile2(buf, GENERIC_WRITE, 0, CREATE_ALWAYS, &extParams);
}
#else
if (((*flags) & 7) == _O_RDONLY) {
ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
} else {
ret = CreateFileW(buf, GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
}
#endif
if (ret == LWS_INVALID_FILE)
goto bail;
fop_fd = malloc(sizeof(*fop_fd));
if (!fop_fd)
goto bail;
fop_fd->fops = fops;
fop_fd->fd = ret;
fop_fd->filesystem_priv = NULL; /* we don't use it */
fop_fd->flags = *flags;
fop_fd->len = 0;
if(GetFileInformationByHandleEx(ret, FileStandardInfo, &fInfo, sizeof(fInfo)))
fop_fd->len = fInfo.EndOfFile.QuadPart;
fop_fd->pos = 0;
return fop_fd;
bail:
return NULL;
}
int
_lws_plat_file_close(lws_fop_fd_t *fop_fd)
{
HANDLE fd = (*fop_fd)->fd;
free(*fop_fd);
*fop_fd = NULL;
CloseHandle((HANDLE)fd);
return 0;
}
lws_fileofs_t
_lws_plat_file_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
{
LARGE_INTEGER l;
l.QuadPart = offset;
return SetFilePointerEx((HANDLE)fop_fd->fd, l, NULL, FILE_CURRENT);
}
int
_lws_plat_file_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
uint8_t *buf, lws_filepos_t len)
{
DWORD _amount;
if (!ReadFile((HANDLE)fop_fd->fd, buf, (DWORD)len, &_amount, NULL)) {
*amount = 0;
return 1;
}
fop_fd->pos += _amount;
*amount = (unsigned long)_amount;
return 0;
}
int
_lws_plat_file_write(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
uint8_t* buf, lws_filepos_t len)
{
DWORD _amount;
if (!WriteFile((HANDLE)fop_fd->fd, buf, (DWORD)len, &_amount, NULL)) {
*amount = 0;
return 1;
}
fop_fd->pos += _amount;
*amount = (unsigned long)_amount;
return 0;
}
int
lws_plat_write_cert(struct lws_vhost *vhost, int is_key, int fd, void *buf,
int len)
{
int n;
n = write(fd, buf, len);
lseek(fd, 0, SEEK_SET);
return n != len;
}
int
lws_plat_write_file(const char *filename, void *buf, int len)
{
int m, fd;
fd = lws_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd == -1)
return -1;
m = write(fd, buf, len);
close(fd);
return m != len;
}
int
lws_plat_read_file(const char *filename, void *buf, int len)
{
int n, fd = lws_open(filename, O_RDONLY);
if (fd == -1)
return -1;
n = read(fd, buf, len);
close(fd);
return n;
}