| /* mz_strm_win32.c -- Stream for filesystem access for windows |
| part of the minizip-ng project |
| |
| Copyright (C) Nathan Moinvaziri |
| https://github.com/zlib-ng/minizip-ng |
| Copyright (C) 2009-2010 Mathias Svensson |
| Modifications for Zip64 support |
| http://result42.com |
| Copyright (C) 1998-2010 Gilles Vollant |
| https://www.winimage.com/zLibDll/minizip.html |
| |
| This program is distributed under the terms of the same license as zlib. |
| See the accompanying LICENSE file for the full text of the license. |
| */ |
| |
| #include "mz.h" |
| #include "mz_os.h" |
| #include "mz_strm.h" |
| #include "mz_strm_os.h" |
| |
| #include <windows.h> |
| |
| /***************************************************************************/ |
| |
| #ifndef INVALID_HANDLE_VALUE |
| # define INVALID_HANDLE_VALUE 0xFFFFFFFF |
| #endif |
| |
| #ifndef INVALID_SET_FILE_POINTER |
| # define INVALID_SET_FILE_POINTER (DWORD)(-1) |
| #endif |
| |
| #ifndef _WIN32_WINNT_WIN8 |
| # define _WIN32_WINNT_WIN8 0x0602 |
| #endif |
| |
| /***************************************************************************/ |
| |
| static mz_stream_vtbl mz_stream_os_vtbl = {mz_stream_os_open, |
| mz_stream_os_is_open, |
| mz_stream_os_read, |
| mz_stream_os_write, |
| mz_stream_os_tell, |
| mz_stream_os_seek, |
| mz_stream_os_close, |
| mz_stream_os_error, |
| mz_stream_os_create, |
| mz_stream_os_delete, |
| NULL, |
| NULL}; |
| |
| /***************************************************************************/ |
| |
| typedef struct mz_stream_win32_s { |
| mz_stream stream; |
| HANDLE handle; |
| int32_t error; |
| } mz_stream_win32; |
| |
| /***************************************************************************/ |
| |
| #if 0 |
| # define mz_stream_os_print printf |
| #else |
| # define mz_stream_os_print(fmt, ...) |
| #endif |
| |
| /***************************************************************************/ |
| |
| int32_t mz_stream_os_open(void *stream, const char *path, int32_t mode) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| uint32_t desired_access = 0; |
| uint32_t creation_disposition = 0; |
| uint32_t share_mode = FILE_SHARE_READ; |
| uint32_t flags_attribs = FILE_ATTRIBUTE_NORMAL; |
| wchar_t *path_wide = NULL; |
| |
| if (!path) |
| return MZ_PARAM_ERROR; |
| |
| /* Some use cases require write sharing as well */ |
| share_mode |= FILE_SHARE_WRITE; |
| |
| if ((mode & MZ_OPEN_MODE_READWRITE) == MZ_OPEN_MODE_READ) { |
| desired_access = GENERIC_READ; |
| creation_disposition = OPEN_EXISTING; |
| } else if (mode & MZ_OPEN_MODE_APPEND) { |
| desired_access = GENERIC_WRITE | GENERIC_READ; |
| creation_disposition = OPEN_EXISTING; |
| } else if (mode & MZ_OPEN_MODE_CREATE) { |
| desired_access = GENERIC_WRITE | GENERIC_READ; |
| creation_disposition = CREATE_ALWAYS; |
| } else { |
| return MZ_PARAM_ERROR; |
| } |
| |
| mz_stream_os_print("Win32 - Open - %s (mode %" PRId32 ")\n", path); |
| |
| path_wide = mz_os_unicode_string_create(path, MZ_ENCODING_UTF8); |
| if (!path_wide) |
| return MZ_PARAM_ERROR; |
| |
| #if _WIN32_WINNT >= _WIN32_WINNT_WIN8 |
| win32->handle = CreateFile2(path_wide, desired_access, share_mode, creation_disposition, NULL); |
| #else |
| win32->handle = CreateFileW(path_wide, desired_access, share_mode, NULL, creation_disposition, flags_attribs, NULL); |
| #endif |
| |
| mz_os_unicode_string_delete(&path_wide); |
| |
| if (mz_stream_os_is_open(stream) != MZ_OK) { |
| win32->error = GetLastError(); |
| return MZ_OPEN_ERROR; |
| } |
| |
| if (mode & MZ_OPEN_MODE_APPEND) |
| return mz_stream_os_seek(stream, 0, MZ_SEEK_END); |
| |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_os_is_open(void *stream) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| if (!win32->handle || win32->handle == INVALID_HANDLE_VALUE) |
| return MZ_OPEN_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_os_read(void *stream, void *buf, int32_t size) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| uint32_t read = 0; |
| |
| if (mz_stream_os_is_open(stream) != MZ_OK) |
| return MZ_OPEN_ERROR; |
| |
| if (!ReadFile(win32->handle, buf, size, (DWORD *)&read, NULL)) { |
| win32->error = GetLastError(); |
| if (win32->error == ERROR_HANDLE_EOF) |
| win32->error = 0; |
| } |
| |
| mz_stream_os_print("Win32 - Read - %" PRId32 "\n", read); |
| |
| return read; |
| } |
| |
| int32_t mz_stream_os_write(void *stream, const void *buf, int32_t size) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| int32_t written = 0; |
| |
| if (mz_stream_os_is_open(stream) != MZ_OK) |
| return MZ_OPEN_ERROR; |
| |
| if (!WriteFile(win32->handle, buf, size, (DWORD *)&written, NULL)) { |
| win32->error = GetLastError(); |
| if (win32->error == ERROR_HANDLE_EOF) |
| win32->error = 0; |
| } |
| |
| mz_stream_os_print("Win32 - Write - %" PRId32 "\n", written); |
| |
| return written; |
| } |
| |
| static int32_t mz_stream_os_seekinternal(HANDLE handle, LARGE_INTEGER large_pos, LARGE_INTEGER *new_pos, |
| uint32_t move_method) { |
| #if _WIN32_WINNT >= _WIN32_WINNT_WINXP |
| BOOL success = FALSE; |
| success = SetFilePointerEx(handle, large_pos, new_pos, move_method); |
| if ((success == FALSE) && (GetLastError() != NO_ERROR)) |
| return MZ_SEEK_ERROR; |
| |
| return MZ_OK; |
| #else |
| LONG high_part = 0; |
| uint32_t pos = 0; |
| |
| high_part = large_pos.HighPart; |
| pos = SetFilePointer(handle, large_pos.LowPart, &high_part, move_method); |
| |
| if ((pos == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR)) |
| return MZ_SEEK_ERROR; |
| |
| if (new_pos) { |
| new_pos->LowPart = pos; |
| new_pos->HighPart = high_part; |
| } |
| |
| return MZ_OK; |
| #endif |
| } |
| |
| int64_t mz_stream_os_tell(void *stream) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| LARGE_INTEGER large_pos; |
| |
| if (mz_stream_os_is_open(stream) != MZ_OK) |
| return MZ_OPEN_ERROR; |
| |
| large_pos.QuadPart = 0; |
| |
| if (mz_stream_os_seekinternal(win32->handle, large_pos, &large_pos, FILE_CURRENT) != MZ_OK) |
| win32->error = GetLastError(); |
| |
| mz_stream_os_print("Win32 - Tell - %" PRId64 "\n", large_pos.QuadPart); |
| |
| return large_pos.QuadPart; |
| } |
| |
| int32_t mz_stream_os_seek(void *stream, int64_t offset, int32_t origin) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| uint32_t move_method = 0xFFFFFFFF; |
| int32_t err = MZ_OK; |
| LARGE_INTEGER large_pos; |
| |
| if (mz_stream_os_is_open(stream) != MZ_OK) |
| return MZ_OPEN_ERROR; |
| |
| switch (origin) { |
| case MZ_SEEK_CUR: |
| move_method = FILE_CURRENT; |
| break; |
| case MZ_SEEK_END: |
| move_method = FILE_END; |
| break; |
| case MZ_SEEK_SET: |
| move_method = FILE_BEGIN; |
| break; |
| default: |
| return MZ_SEEK_ERROR; |
| } |
| |
| mz_stream_os_print("Win32 - Seek - %" PRId64 " (origin %" PRId32 ")\n", offset, origin); |
| |
| large_pos.QuadPart = offset; |
| |
| err = mz_stream_os_seekinternal(win32->handle, large_pos, NULL, move_method); |
| if (err != MZ_OK) { |
| win32->error = GetLastError(); |
| return err; |
| } |
| |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_os_close(void *stream) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| |
| if (win32->handle) |
| CloseHandle(win32->handle); |
| mz_stream_os_print("Win32 - Close\n"); |
| win32->handle = NULL; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_os_error(void *stream) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)stream; |
| return win32->error; |
| } |
| |
| void *mz_stream_os_create(void) { |
| mz_stream_win32 *win32 = (mz_stream_win32 *)calloc(1, sizeof(mz_stream_win32)); |
| if (win32) |
| win32->stream.vtbl = &mz_stream_os_vtbl; |
| return win32; |
| } |
| |
| void mz_stream_os_delete(void **stream) { |
| mz_stream_win32 *win32 = NULL; |
| if (!stream) |
| return; |
| win32 = (mz_stream_win32 *)*stream; |
| if (win32) |
| free(win32); |
| *stream = NULL; |
| } |
| |
| void *mz_stream_os_get_interface(void) { |
| return (void *)&mz_stream_os_vtbl; |
| } |
