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https://github.com/dolphin-emu/dolphin.git
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297 lines
7.9 KiB
C
297 lines
7.9 KiB
C
/* mz_strm_win32.c -- Stream for filesystem access for windows
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part of the minizip-ng project
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Copyright (C) 2010-2021 Nathan Moinvaziri
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https://github.com/zlib-ng/minizip-ng
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Copyright (C) 2009-2010 Mathias Svensson
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Modifications for Zip64 support
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http://result42.com
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Copyright (C) 1998-2010 Gilles Vollant
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https://www.winimage.com/zLibDll/minizip.html
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This program is distributed under the terms of the same license as zlib.
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See the accompanying LICENSE file for the full text of the license.
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*/
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#include "mz.h"
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#include "mz_os.h"
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#include "mz_strm.h"
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#include "mz_strm_os.h"
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#include <windows.h>
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/***************************************************************************/
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#ifndef INVALID_HANDLE_VALUE
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# define INVALID_HANDLE_VALUE (0xFFFFFFFF)
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#endif
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#ifndef INVALID_SET_FILE_POINTER
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# define INVALID_SET_FILE_POINTER ((DWORD)-1)
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#endif
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#if defined(WINAPI_FAMILY_ONE_PARTITION) && !defined(MZ_WINRT_API)
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# if WINAPI_FAMILY_ONE_PARTITION(WINAPI_FAMILY, WINAPI_PARTITION_APP)
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# define MZ_WINRT_API 1
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# endif
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#endif
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/***************************************************************************/
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static mz_stream_vtbl mz_stream_os_vtbl = {
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mz_stream_os_open,
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mz_stream_os_is_open,
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mz_stream_os_read,
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mz_stream_os_write,
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mz_stream_os_tell,
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mz_stream_os_seek,
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mz_stream_os_close,
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mz_stream_os_error,
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mz_stream_os_create,
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mz_stream_os_delete,
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NULL,
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NULL
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};
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/***************************************************************************/
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typedef struct mz_stream_win32_s {
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mz_stream stream;
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HANDLE handle;
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int32_t error;
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} mz_stream_win32;
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/***************************************************************************/
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#if 0
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# define mz_stream_os_print printf
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#else
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# define mz_stream_os_print(fmt,...)
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#endif
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/***************************************************************************/
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int32_t mz_stream_os_open(void *stream, const char *path, int32_t mode) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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uint32_t desired_access = 0;
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uint32_t creation_disposition = 0;
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uint32_t share_mode = FILE_SHARE_READ;
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uint32_t flags_attribs = FILE_ATTRIBUTE_NORMAL;
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wchar_t *path_wide = NULL;
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if (path == NULL)
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return MZ_PARAM_ERROR;
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/* Some use cases require write sharing as well */
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share_mode |= FILE_SHARE_WRITE;
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if ((mode & MZ_OPEN_MODE_READWRITE) == MZ_OPEN_MODE_READ) {
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desired_access = GENERIC_READ;
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creation_disposition = OPEN_EXISTING;
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} else if (mode & MZ_OPEN_MODE_APPEND) {
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desired_access = GENERIC_WRITE | GENERIC_READ;
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creation_disposition = OPEN_EXISTING;
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} else if (mode & MZ_OPEN_MODE_CREATE) {
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desired_access = GENERIC_WRITE | GENERIC_READ;
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creation_disposition = CREATE_ALWAYS;
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} else {
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return MZ_PARAM_ERROR;
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}
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mz_stream_os_print("Win32 - Open - %s (mode %" PRId32 ")\n", path);
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path_wide = mz_os_unicode_string_create(path, MZ_ENCODING_UTF8);
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if (path_wide == NULL)
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return MZ_PARAM_ERROR;
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#ifdef MZ_WINRT_API
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win32->handle = CreateFile2(path_wide, desired_access, share_mode,
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creation_disposition, NULL);
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#else
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win32->handle = CreateFileW(path_wide, desired_access, share_mode, NULL,
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creation_disposition, flags_attribs, NULL);
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#endif
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mz_os_unicode_string_delete(&path_wide);
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if (mz_stream_os_is_open(stream) != MZ_OK) {
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win32->error = GetLastError();
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return MZ_OPEN_ERROR;
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}
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if (mode & MZ_OPEN_MODE_APPEND)
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return mz_stream_os_seek(stream, 0, MZ_SEEK_END);
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return MZ_OK;
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}
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int32_t mz_stream_os_is_open(void *stream) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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if (win32->handle == NULL || win32->handle == INVALID_HANDLE_VALUE)
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return MZ_OPEN_ERROR;
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return MZ_OK;
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}
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int32_t mz_stream_os_read(void *stream, void *buf, int32_t size) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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uint32_t read = 0;
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if (mz_stream_os_is_open(stream) != MZ_OK)
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return MZ_OPEN_ERROR;
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if (!ReadFile(win32->handle, buf, size, (DWORD *)&read, NULL)) {
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win32->error = GetLastError();
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if (win32->error == ERROR_HANDLE_EOF)
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win32->error = 0;
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}
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mz_stream_os_print("Win32 - Read - %" PRId32 "\n", read);
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return read;
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}
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int32_t mz_stream_os_write(void *stream, const void *buf, int32_t size) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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int32_t written = 0;
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if (mz_stream_os_is_open(stream) != MZ_OK)
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return MZ_OPEN_ERROR;
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if (!WriteFile(win32->handle, buf, size, (DWORD *)&written, NULL)) {
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win32->error = GetLastError();
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if (win32->error == ERROR_HANDLE_EOF)
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win32->error = 0;
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}
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mz_stream_os_print("Win32 - Write - %" PRId32 "\n", written);
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return written;
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}
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static int32_t mz_stream_os_seekinternal(HANDLE handle, LARGE_INTEGER large_pos,
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LARGE_INTEGER *new_pos, uint32_t move_method) {
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#ifdef MZ_WINRT_API
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BOOL success = FALSE;
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success = SetFilePointerEx(handle, large_pos, new_pos, move_method);
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if ((success == FALSE) && (GetLastError() != NO_ERROR))
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return MZ_SEEK_ERROR;
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return MZ_OK;
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#else
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LONG high_part = 0;
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uint32_t pos = 0;
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high_part = large_pos.HighPart;
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pos = SetFilePointer(handle, large_pos.LowPart, &high_part, move_method);
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if ((pos == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
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return MZ_SEEK_ERROR;
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if (new_pos != NULL) {
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new_pos->LowPart = pos;
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new_pos->HighPart = high_part;
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}
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return MZ_OK;
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#endif
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}
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int64_t mz_stream_os_tell(void *stream) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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LARGE_INTEGER large_pos;
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if (mz_stream_os_is_open(stream) != MZ_OK)
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return MZ_OPEN_ERROR;
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large_pos.QuadPart = 0;
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if (mz_stream_os_seekinternal(win32->handle, large_pos, &large_pos, FILE_CURRENT) != MZ_OK)
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win32->error = GetLastError();
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mz_stream_os_print("Win32 - Tell - %" PRId64 "\n", large_pos.QuadPart);
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return large_pos.QuadPart;
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}
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int32_t mz_stream_os_seek(void *stream, int64_t offset, int32_t origin) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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uint32_t move_method = 0xFFFFFFFF;
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int32_t err = MZ_OK;
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LARGE_INTEGER large_pos;
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if (mz_stream_os_is_open(stream) != MZ_OK)
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return MZ_OPEN_ERROR;
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switch (origin) {
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case MZ_SEEK_CUR:
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move_method = FILE_CURRENT;
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break;
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case MZ_SEEK_END:
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move_method = FILE_END;
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break;
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case MZ_SEEK_SET:
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move_method = FILE_BEGIN;
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break;
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default:
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return MZ_SEEK_ERROR;
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}
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mz_stream_os_print("Win32 - Seek - %" PRId64 " (origin %" PRId32 ")\n", offset, origin);
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large_pos.QuadPart = offset;
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err = mz_stream_os_seekinternal(win32->handle, large_pos, NULL, move_method);
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if (err != MZ_OK) {
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win32->error = GetLastError();
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return err;
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}
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return MZ_OK;
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}
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int32_t mz_stream_os_close(void *stream) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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if (win32->handle != NULL)
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CloseHandle(win32->handle);
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mz_stream_os_print("Win32 - Close\n");
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win32->handle = NULL;
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return MZ_OK;
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}
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int32_t mz_stream_os_error(void *stream) {
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mz_stream_win32 *win32 = (mz_stream_win32 *)stream;
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return win32->error;
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}
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void *mz_stream_os_create(void **stream) {
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mz_stream_win32 *win32 = NULL;
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win32 = (mz_stream_win32 *)MZ_ALLOC(sizeof(mz_stream_win32));
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if (win32 != NULL) {
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memset(win32, 0, sizeof(mz_stream_win32));
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win32->stream.vtbl = &mz_stream_os_vtbl;
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}
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if (stream != NULL)
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*stream = win32;
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return win32;
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}
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void mz_stream_os_delete(void **stream) {
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mz_stream_win32 *win32 = NULL;
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if (stream == NULL)
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return;
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win32 = (mz_stream_win32 *)*stream;
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if (win32 != NULL)
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MZ_FREE(win32);
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*stream = NULL;
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}
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void *mz_stream_os_get_interface(void) {
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return (void *)&mz_stream_os_vtbl;
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}
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