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comparison foosdk/sdk/foobar2000/helpers/file_win32_wrapper.h @ 1:20d02a178406 default tip

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*: check in everything else yay
author Paper <paper@tflc.us>
date Mon, 05 Jan 2026 02:15:46 -0500
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0:e9bb126753e7 1:20d02a178406
1 #pragma once
2
3 #include <libPPUI/win32_op.h>
4 #include <pfc/string-conv-lite.h>
5
6 #ifdef _WIN32
7 namespace file_win32_helpers {
8 t_filesize get_size(HANDLE p_handle);
9 void seek(HANDLE p_handle,t_sfilesize p_position,file::t_seek_mode p_mode);
10 void fillOverlapped(OVERLAPPED & ol, HANDLE myEvent, t_filesize s);
11 void writeOverlappedPass(HANDLE handle, HANDLE myEvent, t_filesize position, const void * in,DWORD inBytes, abort_callback & abort);
12 void writeOverlapped(HANDLE handle, HANDLE myEvent, t_filesize & position, const void * in, size_t inBytes, abort_callback & abort);
13 void writeStreamOverlapped(HANDLE handle, HANDLE myEvent, const void * in, size_t inBytes, abort_callback & abort);
14 DWORD readOverlappedPass(HANDLE handle, HANDLE myEvent, t_filesize position, void * out, DWORD outBytes, abort_callback & abort);
15 size_t readOverlapped(HANDLE handle, HANDLE myEvent, t_filesize & position, void * out, size_t outBytes, abort_callback & abort);
16 size_t readStreamOverlapped(HANDLE handle, HANDLE myEvent, void * out, size_t outBytes, abort_callback & abort);
17 HANDLE createFile(LPCTSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile, abort_callback & abort);
18 size_t lowLevelIO(HANDLE hFile, const GUID & guid, size_t arg1, void * arg2, size_t arg2size, bool canWrite, abort_callback & abort);
19 bool querySeekPenalty(const char * fb2k_path, bool & out);
20 bool querySeekPenalty(const wchar_t * nativePath, bool & out);
21
22 static uint64_t make_uint64(t_uint32 p_low, t_uint32 p_high) {
23 return ((t_uint64)p_low) + ((t_uint64)p_high << 32);
24 }
25 static uint64_t make_uint64(LARGE_INTEGER const& i) {
26 return reinterpret_cast<uint64_t const&>(i);
27 }
28 static uint64_t make_uint64(FILETIME const& ft) {
29 return reinterpret_cast<uint64_t const&>(ft);
30 // return make_uint64(ft.dwLowDateTime, ft.dwHighDateTime);
31 }
32
33 template<typename t_info>
34 static t_filestats translate_stats(const t_info& p_info) {
35 t_filestats ret;
36 ret.m_size = make_uint64(p_info.nFileSizeLow, p_info.nFileSizeHigh);
37 ret.m_timestamp = make_uint64(p_info.ftLastWriteTime);
38 return ret;
39 }
40
41 void attribs_from_win32(t_filestats2& out, DWORD in);
42 template<typename t_info>
43 static t_filestats2 translate_stats2(const t_info& p_info) {
44 t_filestats2 ret;
45 ret.m_size = make_uint64(p_info.nFileSizeLow, p_info.nFileSizeHigh);
46 ret.m_timestamp = make_uint64(p_info.ftLastWriteTime);
47 ret.m_timestampCreate = make_uint64(p_info.ftCreationTime);
48 attribs_from_win32(ret, p_info.dwFileAttributes);
49 return ret;
50 }
51
52 t_filestats2 stats2_from_handle(HANDLE, const wchar_t * fallbackPath, uint32_t flags, abort_callback &a);
53 };
54
55
56 template<bool p_seekable,bool p_writeable>
57 class file_win32_wrapper_t : public service_multi_inherit<file_v2, file_lowLevelIO> {
58 typedef file_win32_wrapper_t<p_seekable, p_writeable> self_t;
59 public:
60 file_win32_wrapper_t(HANDLE handle, pfc::wstringLite && path) : m_handle(handle), m_path(std::move(path)) {}
61
62 static file::ptr g_CreateFile(const char * p_path,DWORD p_access,DWORD p_sharemode,LPSECURITY_ATTRIBUTES p_security_attributes,DWORD p_createmode,DWORD p_flags,HANDLE p_template) {
63 auto pathW = pfc::wideFromUTF8(p_path);
64 SetLastError(NO_ERROR);
65 HANDLE handle = CreateFile(pathW,p_access,p_sharemode,p_security_attributes,p_createmode,p_flags,p_template);
66 if (handle == INVALID_HANDLE_VALUE) {
67 const DWORD code = GetLastError();
68 if (p_access & GENERIC_WRITE) win32_file_write_failure(code, p_path);
69 else exception_io_from_win32(code);
70 }
71 try {
72 return g_create_from_handle(handle, std::move(pathW));
73 } catch(...) {CloseHandle(handle); throw;}
74 }
75
76 static service_ptr_t<file> g_create_from_handle(HANDLE handle, pfc::wstringLite && path) {
77 return new service_impl_t<self_t>(handle, std::move(path));
78 }
79 static service_ptr_t<file> g_create_from_handle(HANDLE handle) {
80 pfc::wstringLite blank;
81 g_create_from_handle(handle, std::move(blank));
82 }
83
84
85 void reopen(abort_callback & p_abort) {seek(0,p_abort);}
86
87 void write(const void * p_buffer,t_size p_bytes,abort_callback & p_abort) {
88 if (!p_writeable) throw exception_io_denied();
89
90 PFC_STATIC_ASSERT(sizeof(t_size) >= sizeof(DWORD));
91
92 t_size bytes_written_total = 0;
93
94 if (sizeof(t_size) == sizeof(DWORD)) {
95 p_abort.check_e();
96 DWORD bytes_written = 0;
97 SetLastError(ERROR_SUCCESS);
98 if (!WriteFile(m_handle,p_buffer,(DWORD)p_bytes,&bytes_written,0)) exception_io_from_win32(GetLastError());
99 if (bytes_written != p_bytes) throw exception_io("Write failure");
100 bytes_written_total = bytes_written;
101 m_position += bytes_written;
102 } else {
103 while(bytes_written_total < p_bytes) {
104 p_abort.check_e();
105 DWORD bytes_written = 0;
106 DWORD delta = (DWORD) pfc::min_t<t_size>(p_bytes - bytes_written_total, 0x80000000u);
107 SetLastError(ERROR_SUCCESS);
108 if (!WriteFile(m_handle,(const t_uint8*)p_buffer + bytes_written_total,delta,&bytes_written,0)) exception_io_from_win32(GetLastError());
109 if (bytes_written != delta) throw exception_io("Write failure");
110 bytes_written_total += bytes_written;
111 m_position += bytes_written;
112 }
113 }
114 }
115
116 t_size read(void * p_buffer,t_size p_bytes,abort_callback & p_abort) {
117 PFC_STATIC_ASSERT(sizeof(t_size) >= sizeof(DWORD));
118
119 t_size bytes_read_total = 0;
120 if (sizeof(t_size) == sizeof(DWORD)) {
121 p_abort.check_e();
122 DWORD bytes_read = 0;
123 SetLastError(ERROR_SUCCESS);
124 if (!ReadFile(m_handle,p_buffer,pfc::downcast_guarded<DWORD>(p_bytes),&bytes_read,0)) exception_io_from_win32(GetLastError());
125 bytes_read_total = bytes_read;
126 m_position += bytes_read;
127 } else {
128 while(bytes_read_total < p_bytes) {
129 p_abort.check_e();
130 DWORD bytes_read = 0;
131 DWORD delta = (DWORD) pfc::min_t<t_size>(p_bytes - bytes_read_total, 0x80000000u);
132 SetLastError(ERROR_SUCCESS);
133 if (!ReadFile(m_handle,(t_uint8*)p_buffer + bytes_read_total,delta,&bytes_read,0)) exception_io_from_win32(GetLastError());
134 bytes_read_total += bytes_read;
135 m_position += bytes_read;
136 if (bytes_read != delta) break;
137 }
138 }
139 return bytes_read_total;
140 }
141
142
143 t_filesize get_size(abort_callback & p_abort) {
144 p_abort.check_e();
145 return file_win32_helpers::get_size(m_handle);
146 }
147
148 t_filesize get_position(abort_callback & p_abort) {
149 p_abort.check_e();
150 return m_position;
151 }
152
153 void resize(t_filesize p_size,abort_callback & p_abort) {
154 if (!p_writeable) throw exception_io_denied();
155 p_abort.check_e();
156 if (m_position != p_size) {
157 file_win32_helpers::seek(m_handle,p_size,file::seek_from_beginning);
158 }
159 SetLastError(ERROR_SUCCESS);
160 if (!SetEndOfFile(m_handle)) {
161 DWORD code = GetLastError();
162 if (m_position != p_size) try {file_win32_helpers::seek(m_handle,m_position,file::seek_from_beginning);} catch(...) {}
163 exception_io_from_win32(code);
164 }
165 if (m_position > p_size) m_position = p_size;
166 if (m_position != p_size) file_win32_helpers::seek(m_handle,m_position,file::seek_from_beginning);
167 }
168
169
170 void seek(t_filesize p_position,abort_callback & p_abort) {
171 if (!p_seekable) throw exception_io_object_not_seekable();
172 p_abort.check_e();
173 if (p_position > file_win32_helpers::get_size(m_handle)) throw exception_io_seek_out_of_range();
174 file_win32_helpers::seek(m_handle,p_position,file::seek_from_beginning);
175 m_position = p_position;
176 }
177
178 bool can_seek() {return p_seekable;}
179 bool get_content_type(pfc::string_base & out) {return false;}
180 bool is_in_memory() {return false;}
181 void on_idle(abort_callback & p_abort) {p_abort.check_e();}
182
183 t_filestats2 get_stats2(uint32_t f, abort_callback& a) {
184 a.check();
185 if (p_writeable) FlushFileBuffers(m_handle);
186 return file_win32_helpers::stats2_from_handle(m_handle, m_path, f, a);
187 }
188 t_filetimestamp get_timestamp(abort_callback & p_abort) {
189 p_abort.check_e();
190 if (p_writeable) FlushFileBuffers(m_handle);
191 SetLastError(ERROR_SUCCESS);
192 FILETIME temp;
193 if (!GetFileTime(m_handle,0,0,&temp)) exception_io_from_win32(GetLastError());
194 return file_win32_helpers::make_uint64(temp);
195 }
196
197 bool is_remote() {return false;}
198 ~file_win32_wrapper_t() {CloseHandle(m_handle);}
199
200 size_t lowLevelIO(const GUID & guid, size_t arg1, void * arg2, size_t arg2size, abort_callback & abort) override {
201 return file_win32_helpers::lowLevelIO(m_handle, guid, arg1, arg2, arg2size, p_writeable, abort);
202 }
203 protected:
204 HANDLE m_handle;
205 t_filesize m_position = 0;
206 pfc::wstringLite m_path;
207 };
208
209 template<bool p_writeable>
210 class file_win32_wrapper_overlapped_t : public service_multi_inherit< file_v2, file_lowLevelIO > {
211 typedef file_win32_wrapper_overlapped_t<p_writeable> self_t;
212 public:
213 file_win32_wrapper_overlapped_t(HANDLE file, pfc::wstringLite && path) : m_handle(file), m_path(std::move(path)) {
214 WIN32_OP( (m_event = CreateEvent(NULL, TRUE, FALSE, NULL)) != NULL );
215 }
216 ~file_win32_wrapper_overlapped_t() {CloseHandle(m_event); CloseHandle(m_handle);}
217 void write(const void * p_buffer,t_size p_bytes,abort_callback & p_abort) {
218 if (!p_writeable) throw exception_io_denied();
219 return file_win32_helpers::writeOverlapped(m_handle, m_event, m_position, p_buffer, p_bytes, p_abort);
220 }
221 t_size read(void * p_buffer,t_size p_bytes,abort_callback & p_abort) {
222 return file_win32_helpers::readOverlapped(m_handle, m_event, m_position, p_buffer, p_bytes, p_abort);
223 }
224
225 void reopen(abort_callback & p_abort) {seek(0,p_abort);}
226
227
228 t_filesize get_size(abort_callback & p_abort) {
229 p_abort.check_e();
230 return file_win32_helpers::get_size(m_handle);
231 }
232
233 t_filesize get_position(abort_callback & p_abort) {
234 p_abort.check_e();
235 return m_position;
236 }
237
238 void resize(t_filesize p_size,abort_callback & p_abort) {
239 if (!p_writeable) throw exception_io_denied();
240 p_abort.check_e();
241 file_win32_helpers::seek(m_handle,p_size,file::seek_from_beginning);
242 SetLastError(ERROR_SUCCESS);
243 if (!SetEndOfFile(m_handle)) {
244 DWORD code = GetLastError();
245 exception_io_from_win32(code);
246 }
247 if (m_position > p_size) m_position = p_size;
248 }
249
250
251 void seek(t_filesize p_position,abort_callback & p_abort) {
252 p_abort.check_e();
253 if (p_position > file_win32_helpers::get_size(m_handle)) throw exception_io_seek_out_of_range();
254 // file_win32_helpers::seek(m_handle,p_position,file::seek_from_beginning);
255 m_position = p_position;
256 }
257
258 bool can_seek() {return true;}
259 bool get_content_type(pfc::string_base & out) {return false;}
260 bool is_in_memory() {return false;}
261 void on_idle(abort_callback & p_abort) {p_abort.check_e();}
262
263
264 t_filestats2 get_stats2(uint32_t f, abort_callback& a) {
265 a.check();
266 if (p_writeable) FlushFileBuffers(m_handle);
267 return file_win32_helpers::stats2_from_handle(m_handle, m_path, f, a);
268 }
269
270 t_filetimestamp get_timestamp(abort_callback & p_abort) {
271 p_abort.check_e();
272 if (p_writeable) FlushFileBuffers(m_handle);
273 SetLastError(ERROR_SUCCESS);
274 FILETIME temp;
275 if (!GetFileTime(m_handle,0,0,&temp)) exception_io_from_win32(GetLastError());
276 return file_win32_helpers::make_uint64(temp);
277 }
278
279 bool is_remote() {return false;}
280
281
282 static file::ptr g_CreateFile(const char * p_path,DWORD p_access,DWORD p_sharemode,LPSECURITY_ATTRIBUTES p_security_attributes,DWORD p_createmode,DWORD p_flags,HANDLE p_template) {
283 auto pathW = pfc::wideFromUTF8(p_path);
284 p_flags |= FILE_FLAG_OVERLAPPED;
285 SetLastError(NO_ERROR);
286 HANDLE handle = CreateFile(pathW,p_access,p_sharemode,p_security_attributes,p_createmode,p_flags,p_template);
287 if (handle == INVALID_HANDLE_VALUE) {
288 const DWORD code = GetLastError();
289 if (p_access & GENERIC_WRITE) win32_file_write_failure(code, p_path);
290 else exception_io_from_win32(code);
291 }
292 try {
293 return g_create_from_handle(handle, std::move(pathW));
294 } catch(...) {CloseHandle(handle); throw;}
295 }
296
297 static file::ptr g_create_from_handle(HANDLE p_handle, pfc::wstringLite && path) {
298 return new service_impl_t<self_t>(p_handle, std::move(path));
299 }
300 static file::ptr g_create_from_handle(HANDLE p_handle) {
301 pfc::wstringLite blank;
302 return g_create_from_handle(p_handle, std::move(blank));
303 }
304
305 size_t lowLevelIO(const GUID & guid, size_t arg1, void * arg2, size_t arg2size, abort_callback & abort) override {
306 return file_win32_helpers::lowLevelIO(m_handle, guid, arg1, arg2, arg2size, p_writeable, abort);
307 }
308
309 protected:
310 HANDLE m_event, m_handle;
311 t_filesize m_position = 0;
312 pfc::wstringLite m_path;
313 };
314
315 #endif // _WIN32