/* * DOS file system functions * * Copyright 1993 Erik Bos * Copyright 1996 Alexandre Julliard * * 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; either * version 2.1 of the License, or (at your option) any later version. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include "wine/port.h" #include #include #include #include #ifdef HAVE_SYS_ERRNO_H #include #endif #include #include #include #include #include #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_LINUX_IOCTL_H #include #endif #include #ifdef HAVE_UNISTD_H # include #endif #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "ntstatus.h" #include "windef.h" #include "winbase.h" #include "winerror.h" #include "wingdi.h" #include "wine/unicode.h" #include "wine/winbase16.h" #include "file.h" #include "winreg.h" #include "winternl.h" #include "wine/server.h" #include "wine/exception.h" #include "excpt.h" #include "smb.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(dosfs); WINE_DECLARE_DEBUG_CHANNEL(file); /* Define the VFAT ioctl to get both short and long file names */ /* FIXME: is it possible to get this to work on other systems? */ #ifdef linux /* We want the real kernel dirent structure, not the libc one */ typedef struct { long d_ino; long d_off; unsigned short d_reclen; char d_name[256]; } KERNEL_DIRENT; #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, KERNEL_DIRENT [2] ) /* To avoid blocking on non-directories in DOSFS_OpenDir_VFAT*/ #ifndef O_DIRECTORY # define O_DIRECTORY 0200000 /* must be directory */ #endif #else /* linux */ #undef VFAT_IOCTL_READDIR_BOTH /* just in case... */ #endif /* linux */ /* Chars we don't want to see in DOS file names */ #define INVALID_DOS_CHARS "*?<>|\"+=,;[] \345" /* at some point we may want to allow Winelib apps to set this */ static const BOOL is_case_sensitive = FALSE; /* * Directory info for DOSFS_ReadDir * contains the names of *all* the files in the directory */ typedef struct { int used; int size; WCHAR names[1]; } DOS_DIR; /* return non-zero if c is the end of a directory name */ static inline int is_end_of_name(WCHAR c) { return !c || (c == '/') || (c == '\\'); } /*********************************************************************** * DOSFS_ValidDOSName * * Return 1 if Unix file 'name' is also a valid MS-DOS name * (i.e. contains only valid DOS chars, lower-case only, fits in 8.3 format). * File name can be terminated by '\0', '\\' or '/'. */ static int DOSFS_ValidDOSName( LPCWSTR name ) { static const char invalid_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" INVALID_DOS_CHARS; const WCHAR *p = name; const char *invalid = !is_case_sensitive ? (invalid_chars + 26) : invalid_chars; int len = 0; if (*p == '.') { /* Check for "." and ".." */ p++; if (*p == '.') p++; /* All other names beginning with '.' are invalid */ return (is_end_of_name(*p)); } while (!is_end_of_name(*p)) { if (*p < 256 && strchr( invalid, (char)*p )) return 0; /* Invalid char */ if (*p == '.') break; /* Start of the extension */ if (++len > 8) return 0; /* Name too long */ p++; } if (*p != '.') return 1; /* End of name */ p++; if (is_end_of_name(*p)) return 0; /* Empty extension not allowed */ len = 0; while (!is_end_of_name(*p)) { if (*p < 256 && strchr( invalid, (char)*p )) return 0; /* Invalid char */ if (*p == '.') return 0; /* Second extension not allowed */ if (++len > 3) return 0; /* Extension too long */ p++; } return 1; } /*********************************************************************** * DOSFS_ToDosFCBFormat * * Convert a file name to DOS FCB format (8+3 chars, padded with blanks), * expanding wild cards and converting to upper-case in the process. * File name can be terminated by '\0', '\\' or '/'. * Return FALSE if the name is not a valid DOS name. * 'buffer' must be at least 12 characters long. */ static BOOL DOSFS_ToDosFCBFormat( LPCWSTR name, LPWSTR buffer ) { static const char invalid_chars[] = INVALID_DOS_CHARS; LPCWSTR p = name; int i; /* Check for "." and ".." */ if (*p == '.') { p++; buffer[0] = '.'; for(i = 1; i < 11; i++) buffer[i] = ' '; buffer[11] = 0; if (*p == '.') { buffer[1] = '.'; p++; } return (!*p || (*p == '/') || (*p == '\\')); } for (i = 0; i < 8; i++) { switch(*p) { case '\0': case '\\': case '/': case '.': buffer[i] = ' '; break; case '?': p++; /* fall through */ case '*': buffer[i] = '?'; break; default: if (*p < 256 && strchr( invalid_chars, (char)*p )) return FALSE; buffer[i] = toupperW(*p); p++; break; } } if (*p == '*') { /* Skip all chars after wildcard up to first dot */ while (*p && (*p != '/') && (*p != '\\') && (*p != '.')) p++; } else { /* Check if name too long */ if (*p && (*p != '/') && (*p != '\\') && (*p != '.')) return FALSE; } if (*p == '.') p++; /* Skip dot */ for (i = 8; i < 11; i++) { switch(*p) { case '\0': case '\\': case '/': buffer[i] = ' '; break; case '.': return FALSE; /* Second extension not allowed */ case '?': p++; /* fall through */ case '*': buffer[i] = '?'; break; default: if (*p < 256 && strchr( invalid_chars, (char)*p )) return FALSE; buffer[i] = toupperW(*p); p++; break; } } buffer[11] = '\0'; /* at most 3 character of the extension are processed * is something behind this ? */ while (*p == '*' || *p == ' ') p++; /* skip wildcards and spaces */ return is_end_of_name(*p); } /*********************************************************************** * DOSFS_ToDosDTAFormat * * Convert a file name from FCB to DTA format (name.ext, null-terminated) * converting to upper-case in the process. * File name can be terminated by '\0', '\\' or '/'. * 'buffer' must be at least 13 characters long. */ static void DOSFS_ToDosDTAFormat( LPCWSTR name, LPWSTR buffer ) { LPWSTR p; memcpy( buffer, name, 8 * sizeof(WCHAR) ); p = buffer + 8; while ((p > buffer) && (p[-1] == ' ')) p--; *p++ = '.'; memcpy( p, name + 8, 3 * sizeof(WCHAR) ); p += 3; while (p[-1] == ' ') p--; if (p[-1] == '.') p--; *p = '\0'; } /*********************************************************************** * DOSFS_AddDirEntry * * Used to construct an array of filenames in DOSFS_OpenDir */ static BOOL DOSFS_AddDirEntry(DOS_DIR **dir, LPCWSTR name, LPCWSTR dosname) { int extra1 = strlenW(name) + 1; int extra2 = strlenW(dosname) + 1; /* if we need more, at minimum double the size */ if( (extra1 + extra2 + (*dir)->used) > (*dir)->size) { int more = (*dir)->size; DOS_DIR *t; if(more<(extra1+extra2)) more = extra1+extra2; t = HeapReAlloc(GetProcessHeap(), 0, *dir, sizeof(**dir) + ((*dir)->size + more)*sizeof(WCHAR) ); if(!t) { SetLastError( ERROR_NOT_ENOUGH_MEMORY ); ERR("Out of memory caching directory structure %d %d %d\n", (*dir)->size, more, (*dir)->used); return FALSE; } (*dir) = t; (*dir)->size += more; } /* at this point, the dir structure is big enough to hold these names */ strcpyW(&(*dir)->names[(*dir)->used], name); (*dir)->used += extra1; strcpyW(&(*dir)->names[(*dir)->used], dosname); (*dir)->used += extra2; return TRUE; } /*********************************************************************** * DOSFS_OpenDir_VFAT */ static BOOL DOSFS_OpenDir_VFAT(DOS_DIR **dir, const char *unix_path) { #ifdef VFAT_IOCTL_READDIR_BOTH KERNEL_DIRENT de[2]; int fd = open( unix_path, O_RDONLY|O_DIRECTORY ); BOOL r = TRUE; /* Check if the VFAT ioctl is supported on this directory */ if ( fd<0 ) return FALSE; while (1) { WCHAR long_name[MAX_PATH]; WCHAR short_name[12]; r = (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) != -1); if(!r) break; if (!de[0].d_reclen) break; MultiByteToWideChar(CP_UNIXCP, 0, de[0].d_name, -1, long_name, MAX_PATH); if (!DOSFS_ToDosFCBFormat( long_name, short_name )) short_name[0] = '\0'; if (de[1].d_name[0]) MultiByteToWideChar(CP_UNIXCP, 0, de[1].d_name, -1, long_name, MAX_PATH); else MultiByteToWideChar(CP_UNIXCP, 0, de[0].d_name, -1, long_name, MAX_PATH); r = DOSFS_AddDirEntry(dir, long_name, short_name ); if(!r) break; } if(r) { static const WCHAR empty_strW[] = { 0 }; DOSFS_AddDirEntry(dir, empty_strW, empty_strW); } close(fd); return r; #else return FALSE; #endif /* VFAT_IOCTL_READDIR_BOTH */ } /*********************************************************************** * DOSFS_OpenDir_Normal * * Now use the standard opendir/readdir interface */ static BOOL DOSFS_OpenDir_Normal( DOS_DIR **dir, const char *unix_path ) { DIR *unixdir = opendir( unix_path ); BOOL r = TRUE; static const WCHAR empty_strW[] = { 0 }; if(!unixdir) return FALSE; while(1) { WCHAR long_name[MAX_PATH]; struct dirent *de = readdir(unixdir); if(!de) break; MultiByteToWideChar(CP_UNIXCP, 0, de->d_name, -1, long_name, MAX_PATH); r = DOSFS_AddDirEntry(dir, long_name, empty_strW); if(!r) break; } if(r) DOSFS_AddDirEntry(dir, empty_strW, empty_strW); closedir(unixdir); return r; } /*********************************************************************** * DOSFS_OpenDir */ static DOS_DIR *DOSFS_OpenDir( const char *unix_path ) { const int init_size = 0x100; DOS_DIR *dir = HeapAlloc( GetProcessHeap(), 0, sizeof(*dir) + init_size*sizeof (WCHAR)); BOOL r; TRACE("%s\n",debugstr_a(unix_path)); if (!dir) { SetLastError( ERROR_NOT_ENOUGH_MEMORY ); return NULL; } dir->used = 0; dir->size = init_size; /* Treat empty path as root directory. This simplifies path split into directory and mask in several other places */ if (!*unix_path) unix_path = "/"; r = DOSFS_OpenDir_VFAT( &dir, unix_path); if(!r) r = DOSFS_OpenDir_Normal( &dir, unix_path); if(!r) { HeapFree(GetProcessHeap(), 0, dir); return NULL; } dir->used = 0; return dir; } /*********************************************************************** * DOSFS_CloseDir */ static void DOSFS_CloseDir( DOS_DIR *dir ) { HeapFree( GetProcessHeap(), 0, dir ); } /*********************************************************************** * DOSFS_ReadDir */ static BOOL DOSFS_ReadDir( DOS_DIR *dir, LPCWSTR *long_name, LPCWSTR *short_name ) { LPCWSTR sn, ln; if (!dir) return FALSE; /* the long pathname is first */ ln = &dir->names[dir->used]; if(ln[0]) *long_name = ln; else return FALSE; dir->used += (strlenW(ln) + 1); /* followed by the short path name */ sn = &dir->names[dir->used]; if(sn[0]) *short_name = sn; else *short_name = NULL; dir->used += (strlenW(sn) + 1); return TRUE; } /*********************************************************************** * DOSFS_Hash * * Transform a Unix file name into a hashed DOS name. If the name is a valid * DOS name, it is converted to upper-case; otherwise it is replaced by a * hashed version that fits in 8.3 format. * File name can be terminated by '\0', '\\' or '/'. * 'buffer' must be at least 13 characters long. */ static void DOSFS_Hash( LPCWSTR name, LPWSTR buffer, BOOL dir_format ) { static const char invalid_chars[] = INVALID_DOS_CHARS "~."; static const char hash_chars[32] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"; LPCWSTR p, ext; LPWSTR dst; unsigned short hash; int i; if (dir_format) { for(i = 0; i < 11; i++) buffer[i] = ' '; buffer[11] = 0; } if (DOSFS_ValidDOSName( name )) { /* Check for '.' and '..' */ if (*name == '.') { buffer[0] = '.'; if (!dir_format) buffer[1] = buffer[2] = '\0'; if (name[1] == '.') buffer[1] = '.'; return; } /* Simply copy the name, converting to uppercase */ for (dst = buffer; !is_end_of_name(*name) && (*name != '.'); name++) *dst++ = toupperW(*name); if (*name == '.') { if (dir_format) dst = buffer + 8; else *dst++ = '.'; for (name++; !is_end_of_name(*name); name++) *dst++ = toupperW(*name); } if (!dir_format) *dst = '\0'; return; } /* Compute the hash code of the file name */ /* If you know something about hash functions, feel free to */ /* insert a better algorithm here... */ if (!is_case_sensitive) { for (p = name, hash = 0xbeef; !is_end_of_name(p[1]); p++) hash = (hash<<3) ^ (hash>>5) ^ tolowerW(*p) ^ (tolowerW(p[1]) << 8); hash = (hash<<3) ^ (hash>>5) ^ tolowerW(*p); /* Last character */ } else { for (p = name, hash = 0xbeef; !is_end_of_name(p[1]); p++) hash = (hash << 3) ^ (hash >> 5) ^ *p ^ (p[1] << 8); hash = (hash << 3) ^ (hash >> 5) ^ *p; /* Last character */ } /* Find last dot for start of the extension */ for (p = name+1, ext = NULL; !is_end_of_name(*p); p++) if (*p == '.') ext = p; if (ext && is_end_of_name(ext[1])) ext = NULL; /* Empty extension ignored */ /* Copy first 4 chars, replacing invalid chars with '_' */ for (i = 4, p = name, dst = buffer; i > 0; i--, p++) { if (is_end_of_name(*p) || (p == ext)) break; *dst++ = (*p < 256 && strchr( invalid_chars, (char)*p )) ? '_' : toupperW(*p); } /* Pad to 5 chars with '~' */ while (i-- >= 0) *dst++ = '~'; /* Insert hash code converted to 3 ASCII chars */ *dst++ = hash_chars[(hash >> 10) & 0x1f]; *dst++ = hash_chars[(hash >> 5) & 0x1f]; *dst++ = hash_chars[hash & 0x1f]; /* Copy the first 3 chars of the extension (if any) */ if (ext) { if (!dir_format) *dst++ = '.'; for (i = 3, ext++; (i > 0) && !is_end_of_name(*ext); i--, ext++) *dst++ = (*ext < 256 && strchr( invalid_chars, (char)*ext )) ? '_' : toupperW(*ext); } if (!dir_format) *dst = '\0'; } /*********************************************************************** * DOSFS_FindUnixName * * Find the Unix file name in a given directory that corresponds to * a file name (either in Unix or DOS format). * File name can be terminated by '\0', '\\' or '/'. * Return TRUE if OK, FALSE if no file name matches. * * 'long_buf' must be at least 'long_len' characters long. If the long name * turns out to be larger than that, the function returns FALSE. * 'short_buf' must be at least 13 characters long. */ BOOL DOSFS_FindUnixName( const DOS_FULL_NAME *path, LPCWSTR name, char *long_buf, INT long_len, LPWSTR short_buf ) { DOS_DIR *dir; LPCWSTR long_name, short_name; WCHAR dos_name[12], tmp_buf[13]; BOOL ret; LPCWSTR p = strchrW( name, '/' ); int len = p ? (int)(p - name) : strlenW(name); if ((p = strchrW( name, '\\' ))) len = min( (int)(p - name), len ); /* Ignore trailing dots and spaces */ while (len > 1 && (name[len-1] == '.' || name[len-1] == ' ')) len--; if (long_len < len + 1) return FALSE; TRACE("%s,%s\n", path->long_name, debugstr_w(name) ); if (!DOSFS_ToDosFCBFormat( name, dos_name )) dos_name[0] = '\0'; if (!(dir = DOSFS_OpenDir( path->long_name ))) { WARN("(%s,%s): can't open dir: %s\n", path->long_name, debugstr_w(name), strerror(errno) ); return FALSE; } while ((ret = DOSFS_ReadDir( dir, &long_name, &short_name ))) { /* Check against Unix name */ if (len == strlenW(long_name)) { if (is_case_sensitive) { if (!strncmpW( long_name, name, len )) break; } else { if (!strncmpiW( long_name, name, len )) break; } } if (dos_name[0]) { /* Check against hashed DOS name */ if (!short_name) { DOSFS_Hash( long_name, tmp_buf, TRUE ); short_name = tmp_buf; } if (!strcmpW( dos_name, short_name )) break; } } if (ret) { if (long_buf) WideCharToMultiByte(CP_UNIXCP, 0, long_name, -1, long_buf, long_len, NULL, NULL); if (short_buf) { if (short_name) DOSFS_ToDosDTAFormat( short_name, short_buf ); else DOSFS_Hash( long_name, short_buf, FALSE ); } TRACE("(%s,%s) -> %s (%s)\n", path->long_name, debugstr_w(name), debugstr_w(long_name), short_buf ? debugstr_w(short_buf) : "***"); } else WARN("%s not found in '%s'\n", debugstr_w(name), path->long_name); DOSFS_CloseDir( dir ); return ret; } /*********************************************************************** * DOSFS_GetPathDrive * * Get the drive specified by a given path name (DOS or Unix format). */ static int DOSFS_GetPathDrive( LPCWSTR *name ) { int drive; LPCWSTR p = *name; if (*p && (p[1] == ':')) { drive = toupperW(*p) - 'A'; *name += 2; } else if (*p == '/') /* Absolute Unix path? */ { if ((drive = DRIVE_FindDriveRootW( name )) == -1) { MESSAGE("Warning: %s not accessible from a configured DOS drive\n", debugstr_w(*name) ); /* Assume it really was a DOS name */ drive = DRIVE_GetCurrentDrive(); } } else drive = DRIVE_GetCurrentDrive(); if (!DRIVE_IsValid(drive)) { SetLastError( ERROR_INVALID_DRIVE ); return -1; } return drive; } /*********************************************************************** * DOSFS_GetFullName * * Convert a file name (DOS or mixed DOS/Unix format) to a valid * Unix name / short DOS name pair. * Return FALSE if one of the path components does not exist. The last path * component is only checked if 'check_last' is non-zero. * The buffers pointed to by 'long_buf' and 'short_buf' must be * at least MAX_PATHNAME_LEN long. */ BOOL DOSFS_GetFullName( LPCWSTR name, BOOL check_last, DOS_FULL_NAME *full ) { BOOL found; char *p_l, *root; LPWSTR p_s; static const WCHAR driveA_rootW[] = {'A',':','\\',0}; static const WCHAR dos_rootW[] = {'\\',0}; TRACE("%s (last=%d)\n", debugstr_w(name), check_last ); if ((!*name) || (*name=='\n')) { /* error code for Win98 */ SetLastError(ERROR_BAD_PATHNAME); return FALSE; } if ((full->drive = DOSFS_GetPathDrive( &name )) == -1) return FALSE; lstrcpynA( full->long_name, DRIVE_GetRoot( full->drive ), sizeof(full->long_name) ); if (full->long_name[1]) root = full->long_name + strlen(full->long_name); else root = full->long_name; /* root directory */ strcpyW( full->short_name, driveA_rootW ); full->short_name[0] += full->drive; if ((*name == '\\') || (*name == '/')) /* Absolute path */ { while ((*name == '\\') || (*name == '/')) name++; } else /* Relative path */ { lstrcpynA( root + 1, DRIVE_GetUnixCwd( full->drive ), sizeof(full->long_name) - (root - full->long_name) - 1 ); if (root[1]) *root = '/'; lstrcpynW( full->short_name + 3, DRIVE_GetDosCwd( full->drive ), sizeof(full->short_name)/sizeof(full->short_name[0]) - 3 ); } p_l = full->long_name[1] ? full->long_name + strlen(full->long_name) : full->long_name; p_s = full->short_name[3] ? full->short_name + strlenW(full->short_name) : full->short_name + 2; found = TRUE; while (*name && found) { /* Check for '.' and '..' */ if (*name == '.') { if (is_end_of_name(name[1])) { name++; while ((*name == '\\') || (*name == '/')) name++; continue; } else if ((name[1] == '.') && is_end_of_name(name[2])) { name += 2; while ((*name == '\\') || (*name == '/')) name++; while ((p_l > root) && (*p_l != '/')) p_l--; while ((p_s > full->short_name + 2) && (*p_s != '\\')) p_s--; *p_l = *p_s = '\0'; /* Remove trailing separator */ continue; } } /* Make sure buffers are large enough */ if ((p_s >= full->short_name + sizeof(full->short_name)/sizeof(full->short_name[0]) - 14) || (p_l >= full->long_name + sizeof(full->long_name) - 1)) { SetLastError( ERROR_PATH_NOT_FOUND ); return FALSE; } /* Get the long and short name matching the file name */ if ((found = DOSFS_FindUnixName( full, name, p_l + 1, sizeof(full->long_name) - (p_l - full->long_name) - 1, p_s + 1 ))) { *p_l++ = '/'; p_l += strlen(p_l); *p_s++ = '\\'; p_s += strlenW(p_s); while (!is_end_of_name(*name)) name++; } else if (!check_last) { *p_l++ = '/'; *p_s++ = '\\'; while (!is_end_of_name(*name) && (p_s < full->short_name + sizeof(full->short_name)/sizeof(full->short_name[0]) - 1) && (p_l < full->long_name + sizeof(full->long_name) - 1)) { WCHAR wch; *p_s++ = tolowerW(*name); /* If the drive is case-sensitive we want to create new */ /* files in lower-case otherwise we can't reopen them */ /* under the same short name. */ if (is_case_sensitive) wch = tolowerW(*name); else wch = *name; p_l += WideCharToMultiByte(CP_UNIXCP, 0, &wch, 1, p_l, 2, NULL, NULL); name++; } /* Ignore trailing dots and spaces */ while(p_l[-1] == '.' || p_l[-1] == ' ') { --p_l; --p_s; } *p_l = '\0'; *p_s = '\0'; } while ((*name == '\\') || (*name == '/')) name++; } if (!found) { if (check_last) { SetLastError( ERROR_FILE_NOT_FOUND ); return FALSE; } if (*name) /* Not last */ { SetLastError( ERROR_PATH_NOT_FOUND ); return FALSE; } } if (!full->long_name[0]) strcpy( full->long_name, "/" ); if (!full->short_name[2]) strcpyW( full->short_name + 2, dos_rootW ); TRACE("returning %s = %s\n", full->long_name, debugstr_w(full->short_name) ); return TRUE; } /*********************************************************************** * wine_get_unix_file_name (KERNEL32.@) Not a Windows API * * Return the full Unix file name for a given path. */ BOOL WINAPI wine_get_unix_file_name( LPCWSTR dosW, LPSTR buffer, DWORD len ) { BOOL ret; DOS_FULL_NAME path; ret = DOSFS_GetFullName( dosW, FALSE, &path ); if (ret && len) { strncpy( buffer, path.long_name, len ); buffer[len - 1] = 0; /* ensure 0 termination */ } return ret; } /*********************************************************************** * MulDiv (KERNEL32.@) * RETURNS * Result of multiplication and division * -1: Overflow occurred or Divisor was 0 */ INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor) { LONGLONG ret; if (!nDivisor) return -1; /* We want to deal with a positive divisor to simplify the logic. */ if (nDivisor < 0) { nMultiplicand = - nMultiplicand; nDivisor = -nDivisor; } /* If the result is positive, we "add" to round. else, we subtract to round. */ if ( ( (nMultiplicand < 0) && (nMultiplier < 0) ) || ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) ) ret = (((LONGLONG)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor; else ret = (((LONGLONG)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor; if ((ret > 2147483647) || (ret < -2147483647)) return -1; return ret; } /*********************************************************************** * DosDateTimeToFileTime (KERNEL32.@) */ BOOL WINAPI DosDateTimeToFileTime( WORD fatdate, WORD fattime, LPFILETIME ft) { struct tm newtm; #ifndef HAVE_TIMEGM struct tm *gtm; time_t time1, time2; #endif newtm.tm_sec = (fattime & 0x1f) * 2; newtm.tm_min = (fattime >> 5) & 0x3f; newtm.tm_hour = (fattime >> 11); newtm.tm_mday = (fatdate & 0x1f); newtm.tm_mon = ((fatdate >> 5) & 0x0f) - 1; newtm.tm_year = (fatdate >> 9) + 80; #ifdef HAVE_TIMEGM RtlSecondsSince1970ToTime( timegm(&newtm), (LARGE_INTEGER *)ft ); #else time1 = mktime(&newtm); gtm = gmtime(&time1); time2 = mktime(gtm); RtlSecondsSince1970ToTime( 2*time1-time2, (LARGE_INTEGER *)ft ); #endif return TRUE; } /*********************************************************************** * FileTimeToDosDateTime (KERNEL32.@) */ BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, LPWORD fatdate, LPWORD fattime ) { LARGE_INTEGER li; ULONG t; time_t unixtime; struct tm* tm; li.u.LowPart = ft->dwLowDateTime; li.u.HighPart = ft->dwHighDateTime; RtlTimeToSecondsSince1970( &li, &t ); unixtime = t; tm = gmtime( &unixtime ); if (fattime) *fattime = (tm->tm_hour << 11) + (tm->tm_min << 5) + (tm->tm_sec / 2); if (fatdate) *fatdate = ((tm->tm_year - 80) << 9) + ((tm->tm_mon + 1) << 5) + tm->tm_mday; return TRUE; }