mshtml: Check for null pointers in IHTMLLocation_get*.
[wine/hramrach.git] / dlls / kernel32 / file16.c
blobadaf1abd57fc5c9adc29ad6da8775e5184baee58
1 /*
2 * File handling functions
4 * Copyright 1993 John Burton
5 * Copyright 1996 Alexandre Julliard
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 * TODO:
22 * Fix the CopyFileEx methods to implement the "extended" functionality.
23 * Right now, they simply call the CopyFile method.
26 #include "config.h"
27 #include "wine/port.h"
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <assert.h>
33 #define NONAMELESSUNION
34 #define NONAMELESSSTRUCT
35 #include "winerror.h"
36 #include "windef.h"
37 #include "winbase.h"
38 #include "winternl.h"
39 #include "wine/winbase16.h"
40 #include "kernel_private.h"
41 #include "wine/unicode.h"
42 #include "wine/debug.h"
44 WINE_DEFAULT_DEBUG_CHANNEL(file);
47 /***********************************************************************
48 * GetProfileInt (KERNEL.57)
50 UINT16 WINAPI GetProfileInt16( LPCSTR section, LPCSTR entry, INT16 def_val )
52 return GetPrivateProfileInt16( section, entry, def_val, "win.ini" );
56 /***********************************************************************
57 * GetProfileString (KERNEL.58)
59 INT16 WINAPI GetProfileString16( LPCSTR section, LPCSTR entry, LPCSTR def_val,
60 LPSTR buffer, UINT16 len )
62 return GetPrivateProfileString16( section, entry, def_val,
63 buffer, len, "win.ini" );
67 /***********************************************************************
68 * WriteProfileString (KERNEL.59)
70 BOOL16 WINAPI WriteProfileString16( LPCSTR section, LPCSTR entry,
71 LPCSTR string )
73 return WritePrivateProfileString16( section, entry, string, "win.ini" );
77 /* get the search path for the current module; helper for OpenFile16 */
78 static char *get_search_path(void)
80 UINT len;
81 char *ret, *p, module[OFS_MAXPATHNAME];
83 module[0] = 0;
84 if (GetCurrentTask() && GetModuleFileName16( GetCurrentTask(), module, sizeof(module) ))
86 if (!(p = strrchr( module, '\\' ))) p = module;
87 *p = 0;
90 len = (2 + /* search order: first current dir */
91 GetSystemDirectoryA( NULL, 0 ) + 1 + /* then system dir */
92 GetWindowsDirectoryA( NULL, 0 ) + 1 + /* then windows dir */
93 strlen( module ) + 1 + /* then module path */
94 GetEnvironmentVariableA( "PATH", NULL, 0 ) + 1); /* then look in PATH */
95 if (!(ret = HeapAlloc( GetProcessHeap(), 0, len ))) return NULL;
96 strcpy( ret, ".;" );
97 p = ret + 2;
98 GetSystemDirectoryA( p, ret + len - p );
99 p += strlen( p );
100 *p++ = ';';
101 GetWindowsDirectoryA( p, ret + len - p );
102 p += strlen( p );
103 *p++ = ';';
104 if (module[0])
106 strcpy( p, module );
107 p += strlen( p );
108 *p++ = ';';
110 GetEnvironmentVariableA( "PATH", p, ret + len - p );
111 return ret;
114 /***********************************************************************
115 * OpenFile (KERNEL.74)
116 * OpenFileEx (KERNEL.360)
118 HFILE16 WINAPI OpenFile16( LPCSTR name, OFSTRUCT *ofs, UINT16 mode )
120 HFILE hFileRet;
121 HANDLE handle;
122 FILETIME filetime;
123 WORD filedatetime[2];
124 const char *p, *filename;
126 if (!ofs) return HFILE_ERROR;
128 TRACE("%s %s %s %s%s%s%s%s%s%s%s%s\n",debugstr_a(name),
129 ((mode & 0x3 )==OF_READ)?"OF_READ":
130 ((mode & 0x3 )==OF_WRITE)?"OF_WRITE":
131 ((mode & 0x3 )==OF_READWRITE)?"OF_READWRITE":"unknown",
132 ((mode & 0x70 )==OF_SHARE_COMPAT)?"OF_SHARE_COMPAT":
133 ((mode & 0x70 )==OF_SHARE_DENY_NONE)?"OF_SHARE_DENY_NONE":
134 ((mode & 0x70 )==OF_SHARE_DENY_READ)?"OF_SHARE_DENY_READ":
135 ((mode & 0x70 )==OF_SHARE_DENY_WRITE)?"OF_SHARE_DENY_WRITE":
136 ((mode & 0x70 )==OF_SHARE_EXCLUSIVE)?"OF_SHARE_EXCLUSIVE":"unknown",
137 ((mode & OF_PARSE )==OF_PARSE)?"OF_PARSE ":"",
138 ((mode & OF_DELETE )==OF_DELETE)?"OF_DELETE ":"",
139 ((mode & OF_VERIFY )==OF_VERIFY)?"OF_VERIFY ":"",
140 ((mode & OF_SEARCH )==OF_SEARCH)?"OF_SEARCH ":"",
141 ((mode & OF_CANCEL )==OF_CANCEL)?"OF_CANCEL ":"",
142 ((mode & OF_CREATE )==OF_CREATE)?"OF_CREATE ":"",
143 ((mode & OF_PROMPT )==OF_PROMPT)?"OF_PROMPT ":"",
144 ((mode & OF_EXIST )==OF_EXIST)?"OF_EXIST ":"",
145 ((mode & OF_REOPEN )==OF_REOPEN)?"OF_REOPEN ":""
148 if (mode & OF_PARSE)
150 OpenFile( name, ofs, mode );
151 return 0;
154 if (mode & OF_CREATE)
156 handle = (HANDLE)OpenFile( name, ofs, mode );
157 if (handle == (HANDLE)HFILE_ERROR) goto error;
159 else
161 ofs->cBytes = sizeof(OFSTRUCT);
162 ofs->nErrCode = 0;
163 if (mode & OF_REOPEN) name = ofs->szPathName;
165 if (!name) return HFILE_ERROR;
167 /* the watcom 10.6 IDE relies on a valid path returned in ofs->szPathName
168 Are there any cases where getting the path here is wrong?
169 Uwe Bonnes 1997 Apr 2 */
170 if (!GetFullPathNameA( name, sizeof(ofs->szPathName), ofs->szPathName, NULL )) goto error;
172 /* If OF_SEARCH is set, ignore the given path */
174 filename = name;
175 if ((mode & OF_SEARCH) && !(mode & OF_REOPEN))
177 /* First try the file name as is */
178 if (GetFileAttributesA( filename ) != INVALID_FILE_ATTRIBUTES) filename = NULL;
179 else
181 /* Now remove the path */
182 if (filename[0] && (filename[1] == ':')) filename += 2;
183 if ((p = strrchr( filename, '\\' ))) filename = p + 1;
184 if ((p = strrchr( filename, '/' ))) filename = p + 1;
185 if (!filename[0])
187 SetLastError( ERROR_FILE_NOT_FOUND );
188 goto error;
193 /* Now look for the file */
195 if (filename)
197 BOOL found;
198 char *path = get_search_path();
200 if (!path) goto error;
201 found = SearchPathA( path, filename, NULL, sizeof(ofs->szPathName),
202 ofs->szPathName, NULL );
203 HeapFree( GetProcessHeap(), 0, path );
204 if (!found) goto error;
207 TRACE("found %s\n", debugstr_a(ofs->szPathName) );
209 if (mode & OF_DELETE)
211 if (!DeleteFileA( ofs->szPathName )) goto error;
212 TRACE("(%s): OF_DELETE return = OK\n", name);
213 return 1;
216 handle = (HANDLE)_lopen( ofs->szPathName, mode );
217 if (handle == INVALID_HANDLE_VALUE) goto error;
219 GetFileTime( handle, NULL, NULL, &filetime );
220 FileTimeToDosDateTime( &filetime, &filedatetime[0], &filedatetime[1] );
221 if ((mode & OF_VERIFY) && (mode & OF_REOPEN))
223 if (ofs->Reserved1 != filedatetime[0] || ofs->Reserved2 != filedatetime[1] )
225 CloseHandle( handle );
226 WARN("(%s): OF_VERIFY failed\n", name );
227 /* FIXME: what error here? */
228 SetLastError( ERROR_FILE_NOT_FOUND );
229 goto error;
232 ofs->Reserved1 = filedatetime[0];
233 ofs->Reserved2 = filedatetime[1];
236 TRACE("(%s): OK, return = %p\n", name, handle );
237 hFileRet = Win32HandleToDosFileHandle( handle );
238 if (hFileRet == HFILE_ERROR16) goto error;
239 if (mode & OF_EXIST) _lclose16( hFileRet ); /* Return the handle, but close it first */
240 return hFileRet;
242 error: /* We get here if there was an error opening the file */
243 ofs->nErrCode = GetLastError();
244 WARN("(%s): return = HFILE_ERROR error= %d\n", name,ofs->nErrCode );
245 return HFILE_ERROR16;
249 /***********************************************************************
250 * _lclose (KERNEL.81)
252 HFILE16 WINAPI _lclose16( HFILE16 hFile )
254 if ((hFile >= DOS_TABLE_SIZE) || !dos_handles[hFile])
256 SetLastError( ERROR_INVALID_HANDLE );
257 return HFILE_ERROR16;
259 TRACE("%d (handle32=%p)\n", hFile, dos_handles[hFile] );
260 CloseHandle( dos_handles[hFile] );
261 dos_handles[hFile] = 0;
262 return 0;
265 /***********************************************************************
266 * _lcreat (KERNEL.83)
268 HFILE16 WINAPI _lcreat16( LPCSTR path, INT16 attr )
270 return Win32HandleToDosFileHandle( (HANDLE)_lcreat( path, attr ) );
273 /***********************************************************************
274 * _llseek (KERNEL.84)
276 * FIXME:
277 * Seeking before the start of the file should be allowed for _llseek16,
278 * but cause subsequent I/O operations to fail (cf. interrupt list)
281 LONG WINAPI _llseek16( HFILE16 hFile, LONG lOffset, INT16 nOrigin )
283 return SetFilePointer( DosFileHandleToWin32Handle(hFile), lOffset, NULL, nOrigin );
287 /***********************************************************************
288 * _lopen (KERNEL.85)
290 HFILE16 WINAPI _lopen16( LPCSTR path, INT16 mode )
292 return Win32HandleToDosFileHandle( (HANDLE)_lopen( path, mode ) );
296 /***********************************************************************
297 * _lread16 (KERNEL.82)
299 UINT16 WINAPI _lread16( HFILE16 hFile, LPVOID buffer, UINT16 count )
301 return (UINT16)_lread((HFILE)DosFileHandleToWin32Handle(hFile), buffer, (LONG)count );
305 /***********************************************************************
306 * _lwrite (KERNEL.86)
308 UINT16 WINAPI _lwrite16( HFILE16 hFile, LPCSTR buffer, UINT16 count )
310 return (UINT16)_hwrite( (HFILE)DosFileHandleToWin32Handle(hFile), buffer, (LONG)count );
313 /***********************************************************************
314 * _hread (KERNEL.349)
316 LONG WINAPI WIN16_hread( HFILE16 hFile, SEGPTR buffer, LONG count )
318 LONG maxlen;
320 TRACE("%d %08x %d\n", hFile, (DWORD)buffer, count );
322 /* Some programs pass a count larger than the allocated buffer */
323 maxlen = GetSelectorLimit16( SELECTOROF(buffer) ) - OFFSETOF(buffer) + 1;
324 if (count > maxlen) count = maxlen;
325 return _lread((HFILE)DosFileHandleToWin32Handle(hFile), MapSL(buffer), count );
329 /***********************************************************************
330 * _lread (KERNEL.82)
332 UINT16 WINAPI WIN16_lread( HFILE16 hFile, SEGPTR buffer, UINT16 count )
334 return (UINT16)WIN16_hread( hFile, buffer, (LONG)count );
338 /***********************************************************************
339 * _hwrite (KERNEL.350)
341 LONG WINAPI _hwrite16( HFILE16 hFile, LPCSTR buffer, LONG count )
343 return _hwrite( (HFILE)DosFileHandleToWin32Handle(hFile), buffer, count );
347 /***********************************************************************
348 * GetTempDrive (KERNEL.92)
349 * A closer look at krnl386.exe shows what the SDK doesn't mention:
351 * returns:
352 * AL: driveletter
353 * AH: ':' - yes, some kernel code even does stosw with
354 * the returned AX.
355 * DX: 1 for success
357 UINT WINAPI GetTempDrive( BYTE ignored )
359 WCHAR buffer[8];
360 BYTE ret;
362 if (GetTempPathW( 8, buffer )) ret = (BYTE)toupperW(buffer[0]);
363 else ret = 'C';
364 return MAKELONG( ret | (':' << 8), 1 );
368 /***********************************************************************
369 * GetTempFileName (KERNEL.97)
371 UINT16 WINAPI GetTempFileName16( BYTE drive, LPCSTR prefix, UINT16 unique,
372 LPSTR buffer )
374 char temppath[MAX_PATH];
375 char *prefix16 = NULL;
376 UINT16 ret;
378 if (!(drive & ~TF_FORCEDRIVE)) /* drive 0 means current default drive */
380 GetCurrentDirectoryA(sizeof(temppath), temppath);
381 drive |= temppath[0];
384 if (drive & TF_FORCEDRIVE)
386 char d[3];
388 d[0] = drive & ~TF_FORCEDRIVE;
389 d[1] = ':';
390 d[2] = '\0';
391 if (GetDriveTypeA(d) == DRIVE_NO_ROOT_DIR)
393 drive &= ~TF_FORCEDRIVE;
394 WARN("invalid drive %d specified\n", drive );
398 if (drive & TF_FORCEDRIVE)
399 sprintf(temppath,"%c:", drive & ~TF_FORCEDRIVE );
400 else
401 GetTempPathA( MAX_PATH, temppath );
403 if (prefix)
405 prefix16 = HeapAlloc(GetProcessHeap(), 0, strlen(prefix) + 2);
406 *prefix16 = '~';
407 strcpy(prefix16 + 1, prefix);
410 ret = GetTempFileNameA( temppath, prefix16, unique, buffer );
412 HeapFree(GetProcessHeap(), 0, prefix16);
413 return ret;
417 /***********************************************************************
418 * GetPrivateProfileInt (KERNEL.127)
420 UINT16 WINAPI GetPrivateProfileInt16( LPCSTR section, LPCSTR entry,
421 INT16 def_val, LPCSTR filename )
423 /* we used to have some elaborate return value limitation (<= -32768 etc.)
424 * here, but Win98SE doesn't care about this at all, so I deleted it.
425 * AFAIR versions prior to Win9x had these limits, though. */
426 return (INT16)GetPrivateProfileIntA(section,entry,def_val,filename);
430 /***********************************************************************
431 * WritePrivateProfileString (KERNEL.129)
433 BOOL16 WINAPI WritePrivateProfileString16( LPCSTR section, LPCSTR entry,
434 LPCSTR string, LPCSTR filename )
436 return WritePrivateProfileStringA(section,entry,string,filename);
440 /***********************************************************************
441 * GetWindowsDirectory (KERNEL.134)
443 UINT16 WINAPI GetWindowsDirectory16( LPSTR path, UINT16 count )
445 return GetWindowsDirectoryA( path, count );
449 /***********************************************************************
450 * GetSystemDirectory (KERNEL.135)
452 UINT16 WINAPI GetSystemDirectory16( LPSTR path, UINT16 count )
454 return GetSystemDirectoryA( path, count );
458 /***********************************************************************
459 * GetDriveType (KERNEL.136)
460 * Get the type of a drive in Win16.
462 * RETURNS
463 * The type of the Drive. For a list see GetDriveTypeW from kernel32.
465 * NOTES
466 * Note that it returns DRIVE_REMOTE for CD-ROMs, since MSCDEX uses the
467 * remote drive API. The return value DRIVE_REMOTE for CD-ROMs has been
468 * verified on Win 3.11 and Windows 95. Some programs rely on it, so don't
469 * do any pseudo-clever changes.
471 UINT16 WINAPI GetDriveType16( UINT16 drive ) /* [in] number (NOT letter) of drive */
473 UINT type;
474 WCHAR root[3];
476 root[0] = 'A' + drive;
477 root[1] = ':';
478 root[2] = 0;
479 type = GetDriveTypeW( root );
480 if (type == DRIVE_CDROM) type = DRIVE_REMOTE;
481 else if (type == DRIVE_NO_ROOT_DIR) type = DRIVE_UNKNOWN;
482 return type;
486 /***********************************************************************
487 * GetProfileSectionNames (KERNEL.142)
489 WORD WINAPI GetProfileSectionNames16(LPSTR buffer, WORD size)
492 return GetPrivateProfileSectionNamesA(buffer,size,"win.ini");
496 /***********************************************************************
497 * GetPrivateProfileSectionNames (KERNEL.143)
499 WORD WINAPI GetPrivateProfileSectionNames16( LPSTR buffer, WORD size,
500 LPCSTR filename )
502 return GetPrivateProfileSectionNamesA(buffer,size,filename);
506 /***********************************************************************
507 * CreateDirectory (KERNEL.144)
509 BOOL16 WINAPI CreateDirectory16( LPCSTR path, LPVOID dummy )
511 return CreateDirectoryA( path, NULL );
515 /***********************************************************************
516 * RemoveDirectory (KERNEL.145)
518 BOOL16 WINAPI RemoveDirectory16( LPCSTR path )
520 return RemoveDirectoryA( path );
524 /***********************************************************************
525 * DeleteFile (KERNEL.146)
527 BOOL16 WINAPI DeleteFile16( LPCSTR path )
529 return DeleteFileA( path );
533 /***********************************************************************
534 * SetHandleCount (KERNEL.199)
536 UINT16 WINAPI SetHandleCount16( UINT16 count )
538 return SetHandleCount( count );
542 /***********************************************************************
543 * GetShortPathName (KERNEL.274)
545 WORD WINAPI GetShortPathName16( LPCSTR longpath, LPSTR shortpath, WORD len )
547 return GetShortPathNameA( longpath, shortpath, len );
551 /***********************************************************************
552 * WritePrivateProfileStruct (KERNEL.406)
554 BOOL16 WINAPI WritePrivateProfileStruct16 (LPCSTR section, LPCSTR key,
555 LPVOID buf, UINT16 bufsize, LPCSTR filename)
557 return WritePrivateProfileStructA( section, key, buf, bufsize, filename );
561 /***********************************************************************
562 * GetPrivateProfileStruct (KERNEL.407)
564 BOOL16 WINAPI GetPrivateProfileStruct16(LPCSTR section, LPCSTR key,
565 LPVOID buf, UINT16 len, LPCSTR filename)
567 return GetPrivateProfileStructA( section, key, buf, len, filename );
571 /***********************************************************************
572 * GetCurrentDirectory (KERNEL.411)
574 UINT16 WINAPI GetCurrentDirectory16( UINT16 buflen, LPSTR buf )
576 return GetCurrentDirectoryA( buflen, buf );
580 /***********************************************************************
581 * SetCurrentDirectory (KERNEL.412)
583 BOOL16 WINAPI SetCurrentDirectory16( LPCSTR dir )
585 char fulldir[MAX_PATH];
587 if (!GetFullPathNameA( dir, MAX_PATH, fulldir, NULL )) return FALSE;
589 if (!SetCurrentDirectoryA( dir )) return FALSE;
591 if (fulldir[0] && fulldir[1] == ':')
593 TDB *pTask = GlobalLock16( GetCurrentTask() );
594 char env_var[4] = "=A:";
596 env_var[1] = fulldir[0];
597 SetEnvironmentVariableA( env_var, fulldir );
599 /* update the directory in the TDB */
600 if (pTask)
602 pTask->curdrive = 0x80 | (fulldir[0] - 'A');
603 GetShortPathNameA( fulldir + 2, pTask->curdir, sizeof(pTask->curdir) );
606 return TRUE;
610 /*************************************************************************
611 * FindFirstFile (KERNEL.413)
613 HANDLE16 WINAPI FindFirstFile16( LPCSTR path, WIN32_FIND_DATAA *data )
615 HGLOBAL16 h16;
616 HANDLE handle, *ptr;
618 if (!(h16 = GlobalAlloc16( GMEM_MOVEABLE, sizeof(handle) ))) return INVALID_HANDLE_VALUE16;
619 ptr = GlobalLock16( h16 );
620 *ptr = handle = FindFirstFileA( path, data );
621 GlobalUnlock16( h16 );
623 if (handle == INVALID_HANDLE_VALUE)
625 GlobalFree16( h16 );
626 h16 = INVALID_HANDLE_VALUE16;
628 return h16;
632 /*************************************************************************
633 * FindNextFile (KERNEL.414)
635 BOOL16 WINAPI FindNextFile16( HANDLE16 handle, WIN32_FIND_DATAA *data )
637 HANDLE *ptr;
638 BOOL ret = FALSE;
640 if ((handle == INVALID_HANDLE_VALUE16) || !(ptr = GlobalLock16( handle )))
642 SetLastError( ERROR_INVALID_HANDLE );
643 return ret;
645 ret = FindNextFileA( *ptr, data );
646 GlobalUnlock16( handle );
647 return ret;
651 /*************************************************************************
652 * FindClose (KERNEL.415)
654 BOOL16 WINAPI FindClose16( HANDLE16 handle )
656 HANDLE *ptr;
658 if ((handle == INVALID_HANDLE_VALUE16) || !(ptr = GlobalLock16( handle )))
660 SetLastError( ERROR_INVALID_HANDLE );
661 return FALSE;
663 FindClose( *ptr );
664 GlobalUnlock16( handle );
665 GlobalFree16( handle );
666 return TRUE;
670 /***********************************************************************
671 * WritePrivateProfileSection (KERNEL.416)
673 BOOL16 WINAPI WritePrivateProfileSection16( LPCSTR section,
674 LPCSTR string, LPCSTR filename )
676 return WritePrivateProfileSectionA( section, string, filename );
680 /***********************************************************************
681 * WriteProfileSection (KERNEL.417)
683 BOOL16 WINAPI WriteProfileSection16( LPCSTR section, LPCSTR keys_n_values)
685 return WritePrivateProfileSection16( section, keys_n_values, "win.ini");
689 /***********************************************************************
690 * GetPrivateProfileSection (KERNEL.418)
692 INT16 WINAPI GetPrivateProfileSection16( LPCSTR section, LPSTR buffer,
693 UINT16 len, LPCSTR filename )
695 return GetPrivateProfileSectionA( section, buffer, len, filename );
699 /***********************************************************************
700 * GetProfileSection (KERNEL.419)
702 INT16 WINAPI GetProfileSection16( LPCSTR section, LPSTR buffer, UINT16 len )
704 return GetPrivateProfileSection16( section, buffer, len, "win.ini" );
708 /**************************************************************************
709 * GetFileAttributes (KERNEL.420)
711 DWORD WINAPI GetFileAttributes16( LPCSTR name )
713 return GetFileAttributesA( name );
717 /**************************************************************************
718 * SetFileAttributes (KERNEL.421)
720 BOOL16 WINAPI SetFileAttributes16( LPCSTR lpFileName, DWORD attributes )
722 return SetFileAttributesA( lpFileName, attributes );
726 /***********************************************************************
727 * GetDiskFreeSpace (KERNEL.422)
729 BOOL16 WINAPI GetDiskFreeSpace16( LPCSTR root, LPDWORD cluster_sectors,
730 LPDWORD sector_bytes, LPDWORD free_clusters,
731 LPDWORD total_clusters )
733 return GetDiskFreeSpaceA( root, cluster_sectors, sector_bytes,
734 free_clusters, total_clusters );
737 /***********************************************************************
738 * FileCDR (KERNEL.130)
740 FARPROC16 WINAPI FileCDR16(FARPROC16 x)
742 FIXME("(%p): stub\n", x);
743 return (FARPROC16)TRUE;