813 lines
28 KiB
C++
813 lines
28 KiB
C++
/*
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Copyright (c) 1990-2003 Info-ZIP. All rights reserved.
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See the accompanying file LICENSE, version 2000-Apr-09 or later
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(the contents of which are also included in unzip.h) for terms of use.
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If, for some reason, all these files are missing, the Info-ZIP license
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also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
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*/
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//******************************************************************************
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//
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// File: WINCE.CPP
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//
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// Description: This file implements all the Win32 APIs and C runtime functions
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// that the Info-ZIP code calls, but are not implemented natively
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// on Windows CE.
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//
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// Copyright: All the source files for Pocket UnZip, except for components
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// written by the Info-ZIP group, are copyrighted 1997 by Steve P.
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// Miller. The product "Pocket UnZip" itself is property of the
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// author and cannot be altered in any way without written consent
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// from Steve P. Miller.
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//
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// Disclaimer: All project files are provided "as is" with no guarantee of
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// their correctness. The authors are not liable for any outcome
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// that is the result of using this source. The source for Pocket
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// UnZip has been placed in the public domain to help provide an
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// understanding of its implementation. You are hereby granted
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// full permission to use this source in any way you wish, except
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// to alter Pocket UnZip itself. For comments, suggestions, and
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// bug reports, please write to stevemil@pobox.com.
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//
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// Functions: DebugOut
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// chmod
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// close
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// isatty
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// lseek
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// open
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// read
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// setmode
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// unlink
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// fflush
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// fgets
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// fileno
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// fopen
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// fprintf
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// fclose
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// putc
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// sprintf
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// _stricmp
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// _strupr
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// strrchr (non-_MBCS only)
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// isupper
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// stat
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// localtime
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//
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// Internal helper functions:
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// SafeGetTimeZoneInformation
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// GetTransitionTimeT
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// IsDST
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//
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//
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// Date Name History
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// -------- ------------ -----------------------------------------------------
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// 02/01/97 Steve Miller Created (Version 1.0 using Info-ZIP UnZip 5.30)
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//
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//******************************************************************************
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extern "C" {
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#define __WINCE_CPP
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#define UNZIP_INTERNAL
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#include "unzip.h"
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}
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#include <tchar.h> // Must be outside of extern "C" block
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//******************************************************************************
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//***** For all platforms - Our debug output function
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//******************************************************************************
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#ifdef DEBUG // RETAIL version is __inline and does not generate any code.
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void DebugOut(LPCTSTR szFormat, ...) {
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TCHAR szBuffer[512] = TEXT("PUNZIP: ");
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va_list pArgs;
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va_start(pArgs, szFormat);
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_vsntprintf(szBuffer + 8, countof(szBuffer) - 10, szFormat, pArgs);
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va_end(pArgs);
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TCHAR *psz = szBuffer;
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while (psz = _tcschr(psz, TEXT('\n'))) {
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*psz = TEXT('|');
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}
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psz = szBuffer;
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while (psz = _tcschr(psz, TEXT('\r'))) {
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*psz = TEXT('|');
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}
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_tcscat(szBuffer, TEXT("\r\n"));
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OutputDebugString(szBuffer);
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}
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#endif // DEBUG
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//******************************************************************************
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//***** Windows CE Native
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//******************************************************************************
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#if defined(_WIN32_WCE)
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//******************************************************************************
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//***** Local Function Prototyopes
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//******************************************************************************
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static void SafeGetTimeZoneInformation(TIME_ZONE_INFORMATION *ptzi);
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static time_t GetTransitionTimeT(TIME_ZONE_INFORMATION *ptzi,
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int year, BOOL fStartDST);
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static BOOL IsDST(TIME_ZONE_INFORMATION *ptzi, time_t localTime);
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//******************************************************************************
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//***** IO.H functions
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl chmod(const char *filename, int pmode) {
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// Called before unlink() to delete read-only files.
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DWORD dwAttribs = (pmode & _S_IWRITE) ? FILE_ATTRIBUTE_NORMAL : FILE_ATTRIBUTE_READONLY;
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TCHAR szPath[_MAX_PATH];
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MBSTOTSTR(szPath, filename, countof(szPath));
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return (SetFileAttributes(szPath, dwAttribs) ? 0 : -1);
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}
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//******************************************************************************
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//-- Called from process.c
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int __cdecl close(int handle) {
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return (CloseHandle((HANDLE)handle) ? 0 : -1);
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}
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl isatty(int handle) {
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// returns TRUE if handle is a terminal, console, printer, or serial port
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// called with 1 (stdout) and 2 (stderr)
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return 0;
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}
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//******************************************************************************
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//-- Called from extract.c, fileio.c, process.c
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long __cdecl lseek(int handle, long offset, int origin) {
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// SEEK_SET, SEEK_CUR, SEEK_END are equal to FILE_BEGIN, FILE_CURRENT, FILE_END
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return SetFilePointer((HANDLE)handle, offset, NULL, origin);
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}
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl open(const char *filename, int oflags, ...) {
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// The Info-Zip code currently only opens existing ZIP files for read
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// using open().
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DWORD dwAccess = 0;
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DWORD dwCreate = 0;
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switch (oflags & (_O_RDONLY | _O_WRONLY | _O_RDWR)) {
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case _O_RDONLY:
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dwAccess = GENERIC_READ;
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break;
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case _O_WRONLY:
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dwAccess = GENERIC_WRITE;
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break;
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case _O_RDWR:
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dwAccess = GENERIC_READ | GENERIC_WRITE;
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break;
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}
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switch (oflags & (O_CREAT | O_TRUNC)) {
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case _O_CREAT:
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dwCreate = OPEN_ALWAYS;
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break;
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case _O_CREAT | _O_TRUNC:
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dwCreate = CREATE_ALWAYS;
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break;
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default:
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dwCreate = OPEN_EXISTING;
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break;
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}
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TCHAR szPath[_MAX_PATH];
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MBSTOTSTR(szPath, filename, countof(szPath));
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HANDLE hFile = CreateFile(szPath, dwAccess,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, dwCreate, FILE_ATTRIBUTE_NORMAL, NULL);
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if ((hFile != INVALID_HANDLE_VALUE) && ((oflags & O_APPEND) == O_APPEND)) {
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SetFilePointer(hFile, 0, NULL, FILE_END);
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}
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return ((hFile == INVALID_HANDLE_VALUE) ? -1 : (int)hFile);
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}
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//******************************************************************************
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//-- Called from extract.c, fileio.c, process.c
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int __cdecl read(int handle, void *buffer, unsigned int count) {
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DWORD dwRead = 0;
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return (ReadFile((HANDLE)handle, buffer, count, &dwRead, NULL) ? dwRead : -1);
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}
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#if _WIN32_WCE < 211
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//******************************************************************************
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//-- Called from extract.c
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int __cdecl setmode(int handle, int mode) {
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//TEXT/BINARY translation - currently always called with O_BINARY.
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return O_BINARY;
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}
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#endif
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl unlink(const char *filename) {
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// Called to delete files before an extract overwrite.
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TCHAR szPath[_MAX_PATH];
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MBSTOTSTR(szPath, filename, countof(szPath));
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return (DeleteFile(szPath) ? 0: -1);
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}
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//******************************************************************************
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//***** STDIO.H functions
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//******************************************************************************
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#if _WIN32_WCE < 211
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// Old versions of Win CE prior to 2.11 do not support stdio library functions.
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// We provide simplyfied replacements that are more or less copies of the
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// UNIX style low level I/O API functions. Only unbuffered I/O in binary mode
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// is supported.
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//-- Called from fileio.c
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int __cdecl fflush(FILE *stream) {
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return (FlushFileBuffers((HANDLE)stream) ? 0 : EOF);
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}
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//******************************************************************************
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//-- Called from extract.c
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char * __cdecl fgets(char *string, int n, FILE *stream) {
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// stream always equals "stdin" and fgets() should never be called.
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DebugOut(TEXT("WARNING: fgets(0x%08X, %d, %08X) called."), string, n, stream);
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return NULL;
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}
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//******************************************************************************
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//-- Called from extract.c
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int __cdecl fileno(FILE *stream) {
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return (int)stream;
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}
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//******************************************************************************
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//-- Called from fileio.c
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FILE * __cdecl fopen(const char *filename, const char *mode) {
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// fopen() is used to create all extracted files.
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DWORD dwAccess = 0;
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DWORD dwCreate = 0;
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BOOL fAppend = FALSE;
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if (strstr(mode, "r+")) {
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dwAccess = GENERIC_READ | GENERIC_WRITE;
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dwCreate = OPEN_EXISTING;
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} else if (strstr(mode, "w+")) {
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dwAccess = GENERIC_READ | GENERIC_WRITE;
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dwCreate = CREATE_ALWAYS;
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} else if (strstr(mode, "a+")) {
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dwAccess = GENERIC_READ | GENERIC_WRITE;
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dwCreate = OPEN_ALWAYS;
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fAppend = TRUE;
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} else if (strstr(mode, "r")) {
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dwAccess = GENERIC_READ;
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dwCreate = OPEN_EXISTING;
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} else if (strstr(mode, "w")) {
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dwAccess = GENERIC_WRITE;
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dwCreate = CREATE_ALWAYS;
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} else if (strstr(mode, "a")) {
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dwAccess = GENERIC_WRITE;
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dwCreate = OPEN_ALWAYS;
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fAppend = TRUE;
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}
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TCHAR szPath[_MAX_PATH];
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MBSTOTSTR(szPath, filename, countof(szPath));
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HANDLE hFile = CreateFile(szPath, dwAccess,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, dwCreate, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile == INVALID_HANDLE_VALUE) {
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return NULL;
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}
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if (fAppend) {
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SetFilePointer(hFile, 0, NULL, FILE_END);
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}
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return (FILE*)hFile;
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}
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//******************************************************************************
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//-- Called from many sources when compiled for DEBUG
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int __cdecl fprintf(FILE *stream, const char *format, ...) {
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// All standard output/error in Info-ZIP is handled through fprintf()
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if ((stream == stdout) || (stream == stderr)) {
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return 1;
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}
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// "stream" always equals "stderr" or "stdout" - log error if we see otherwise.
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#ifdef UNICODE
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DebugOut(TEXT("WARNING: fprintf(0x%08X, \"%S\", ...) called."), stream, format);
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#else
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DebugOut(TEXT("WARNING: fprintf(0x%08X, \"%s\", ...) called."), stream, format);
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#endif
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return 0;
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}
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl fclose(FILE *stream) {
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return (CloseHandle((HANDLE)stream) ? 0 : EOF);
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}
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//******************************************************************************
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//-- Called from fileio.c
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int __cdecl putc(int c, FILE *stream) {
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DebugOut(TEXT("WARNING: putc(%d, 0x%08X) called."), c, stream);
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return 0;
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}
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//******************************************************************************
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//-- Called from intrface.cpp, extract.c, fileio.c, list.c, process.c
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int __cdecl sprintf(char *buffer, const char *format, ...) {
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WCHAR wszBuffer[512], wszFormat[512];
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MBSTOTSTR(wszFormat, format, countof(wszFormat));
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BOOL fPercent = FALSE;
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for (WCHAR *pwsz = wszFormat; *pwsz; pwsz++) {
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if (*pwsz == L'%') {
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fPercent = !fPercent;
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} else if (fPercent && (((*pwsz >= L'a') && (*pwsz <= L'z')) ||
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((*pwsz >= L'A') && (*pwsz <= L'Z'))))
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{
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if (*pwsz == L's') {
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*pwsz = L'S';
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} else if (*pwsz == L'S') {
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*pwsz = L's';
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}
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fPercent = FALSE;
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}
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}
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va_list pArgs;
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va_start(pArgs, format);
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_vsntprintf(wszBuffer, countof(wszBuffer), wszFormat, pArgs);
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va_end(pArgs);
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TSTRTOMBS(buffer, wszBuffer, countof(wszBuffer));
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return 0;
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}
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#endif /* _WIN32_WCE < 211 */
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#ifndef POCKET_UNZIP
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//******************************************************************************
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//-- Called from unzip.c
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void __cdecl perror(const char* errorText)
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{
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OutputDebugString((LPCTSTR)errorText);
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}
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#endif // !POCKET_UNZIP
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#ifdef USE_FWRITE
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//******************************************************************************
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//-- Called from fileio.c
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void __cdecl setbuf(FILE *, char *)
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{
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// We are using fwrite and the call to setbuf was to set the stream
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// unbuffered which is the default behaviour, we have nothing to do.
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}
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#endif // USE_FWRITE
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//******************************************************************************
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//***** STDLIB.H functions
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//******************************************************************************
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#ifdef _MBCS
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int __cdecl mblen(const char *mbc, size_t mbszmax)
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{
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// very simple cooked-down version of mblen() without any error handling
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// (Windows CE does not support multibyte charsets with a maximum char
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// length > 2 bytes)
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return (IsDBCSLeadByte((BYTE)*mbc) ? 2 : 1);
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}
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#endif /* _MBCS */
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//******************************************************************************
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//***** STRING.H functions
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//******************************************************************************
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//-- Called from winmain.cpp
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int __cdecl _stricmp(const char *string1, const char *string2) {
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while (*string1 && ((*string1 | 0x20) == (*string2 | 0x20))) {
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string1++;
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string2++;
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}
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return (*string1 - *string2);
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}
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//******************************************************************************
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//-- Called from intrface.cpp and winmain.cpp
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char* __cdecl _strupr(char *string) {
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while (*string) {
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if ((*string >= 'a') && (*string <= 'z')) {
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*string -= 'a' - 'A';
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}
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string++;
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}
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return string;
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}
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//******************************************************************************
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//-- Called from fileio.c ("open_input_file()")
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char* __cdecl strerror(int errnum) {
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return "[errmsg not available]";
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}
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#ifndef _MBCS
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//******************************************************************************
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//-- Called from winmain.cpp
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char* __cdecl strrchr(const char *string, int c) {
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// Walk to end of string.
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for (char *p = (char*)string; *p; p++) {
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}
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// Walk backwards looking for character.
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for (p--; p >= string; p--) {
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if ((int)*p == c) {
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return p;
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}
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}
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return NULL;
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}
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#endif /* !_MBCS */
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//******************************************************************************
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//***** CTYPE.H functions
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//******************************************************************************
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#if _WIN32_WCE < 300
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int __cdecl isupper(int c) {
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return ((c >= 'A') && (c <= 'Z'));
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}
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#endif
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//******************************************************************************
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//***** STAT.H functions
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//******************************************************************************
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//-- Called fileio.c, process.c, intrface.cpp
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int __cdecl stat(const char *path, struct stat *buffer) {
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// stat() is called on both the ZIP files and extracted files.
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// Clear our stat buffer to be safe.
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ZeroMemory(buffer, sizeof(struct stat));
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// Find the file/direcotry and fill in a WIN32_FIND_DATA structure.
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WIN32_FIND_DATA w32fd;
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ZeroMemory(&w32fd, sizeof(w32fd));
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TCHAR szPath[_MAX_PATH];
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MBSTOTSTR(szPath, path, countof(szPath));
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HANDLE hFind = FindFirstFile(szPath, &w32fd);
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// Bail out now if we could not find the file/directory.
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if (hFind == INVALID_HANDLE_VALUE) {
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return -1;
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}
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// Close the find.
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FindClose(hFind);
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// Mode flags that are currently used: S_IWRITE, S_IFMT, S_IFDIR, S_IEXEC
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if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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buffer->st_mode = _S_IFDIR | _S_IREAD | _S_IEXEC;
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} else {
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buffer->st_mode = _S_IFREG | _S_IREAD;
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}
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if (!(w32fd.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
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buffer->st_mode |= _S_IWRITE;
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}
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// Store the file size.
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buffer->st_size = (_off_t)w32fd.nFileSizeLow;
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// Convert the modified FILETIME to a time_t and store it.
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DWORDLONG dwl = *(DWORDLONG*)&w32fd.ftLastWriteTime;
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buffer->st_mtime = (time_t)((dwl - (DWORDLONG)116444736000000000) / (DWORDLONG)10000000);
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return 0;
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}
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//******************************************************************************
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//***** TIME.H functions
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//******************************************************************************
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// Evaluates to TRUE if 'y' is a leap year, otherwise FALSE
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// #define IS_LEAP_YEAR(y) ((((y) % 4 == 0) && ((y) % 100 != 0)) || ((y) % 400 == 0))
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// The macro below is a reduced version of the above macro. It is valid for
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// years between 1901 and 2099 which easily includes all years representable
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// by the current implementation of time_t.
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#define IS_LEAP_YEAR(y) (((y) & 3) == 0)
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#define BASE_DOW 4 // 1/1/1970 was a Thursday.
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#define SECONDS_IN_A_DAY (24L * 60L * 60L) // Number of seconds in one day.
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// Month to Year Day conversion array.
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int M2YD[] = {
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365
|
|
};
|
|
|
|
// Month to Leap Year Day conversion array.
|
|
int M2LYD[] = {
|
|
0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366
|
|
};
|
|
|
|
//******************************************************************************
|
|
//-- Called from list.c
|
|
struct tm * __cdecl localtime(const time_t *timer) {
|
|
|
|
// Return value for localtime(). Source currently never references
|
|
// more than one "tm" at a time, so the single return structure is ok.
|
|
static struct tm g_tm;
|
|
ZeroMemory(&g_tm, sizeof(g_tm));
|
|
|
|
// Get our time zone information.
|
|
TIME_ZONE_INFORMATION tzi;
|
|
SafeGetTimeZoneInformation(&tzi);
|
|
|
|
// Create a time_t that has been corrected for our time zone.
|
|
time_t localTime = *timer - (tzi.Bias * 60L);
|
|
|
|
// Decide if value is in Daylight Savings Time.
|
|
if (g_tm.tm_isdst = (int)IsDST(&tzi, localTime)) {
|
|
localTime -= tzi.DaylightBias * 60L; // usually 60 minutes
|
|
} else {
|
|
localTime -= tzi.StandardBias * 60L; // usually 0 minutes
|
|
}
|
|
|
|
// time_t is a 32-bit value for the seconds since January 1, 1970
|
|
// FILETIME is a 64-bit value for the number of 100-nanosecond intervals
|
|
// since January 1, 1601
|
|
|
|
// Compute the FILETIME for the given local time.
|
|
DWORDLONG dwl = ((DWORDLONG)116444736000000000 +
|
|
((DWORDLONG)localTime * (DWORDLONG)10000000));
|
|
FILETIME ft = *(FILETIME*)&dwl;
|
|
|
|
// Convert the FILETIME to a SYSTEMTIME.
|
|
SYSTEMTIME st;
|
|
ZeroMemory(&st, sizeof(st));
|
|
FileTimeToSystemTime(&ft, &st);
|
|
|
|
// Finish filling in our "tm" structure.
|
|
g_tm.tm_sec = (int)st.wSecond;
|
|
g_tm.tm_min = (int)st.wMinute;
|
|
g_tm.tm_hour = (int)st.wHour;
|
|
g_tm.tm_mday = (int)st.wDay;
|
|
g_tm.tm_mon = (int)st.wMonth - 1;
|
|
g_tm.tm_year = (int)st.wYear - 1900;
|
|
|
|
return &g_tm;
|
|
}
|
|
|
|
//******************************************************************************
|
|
static void SafeGetTimeZoneInformation(TIME_ZONE_INFORMATION *ptzi)
|
|
{
|
|
|
|
ZeroMemory(ptzi, sizeof(TIME_ZONE_INFORMATION));
|
|
|
|
// Ask the OS for the standard/daylight rules for the current time zone.
|
|
if ((GetTimeZoneInformation(ptzi) == 0xFFFFFFFF) ||
|
|
(ptzi->StandardDate.wMonth > 12) || (ptzi->DaylightDate.wMonth > 12))
|
|
{
|
|
// If the OS fails us, we default to the United States' rules.
|
|
ZeroMemory(ptzi, sizeof(TIME_ZONE_INFORMATION));
|
|
ptzi->StandardDate.wMonth = 10; // October
|
|
ptzi->StandardDate.wDay = 5; // Last Sunday (DOW == 0)
|
|
ptzi->StandardDate.wHour = 2; // At 2:00 AM
|
|
ptzi->DaylightBias = -60; // One hour difference
|
|
ptzi->DaylightDate.wMonth = 4; // April
|
|
ptzi->DaylightDate.wDay = 1; // First Sunday (DOW == 0)
|
|
ptzi->DaylightDate.wHour = 2; // At 2:00 AM
|
|
}
|
|
}
|
|
|
|
//******************************************************************************
|
|
static time_t GetTransitionTimeT(TIME_ZONE_INFORMATION *ptzi,
|
|
int year, BOOL fStartDST)
|
|
{
|
|
// We only handle years within the range that time_t supports. We need to
|
|
// handle the very end of 1969 since the local time could be up to 13 hours
|
|
// into the previous year. In this case, our code will actually return a
|
|
// negative value, but it will be compared to another negative value and is
|
|
// handled correctly. The same goes for the 13 hours past a the max time_t
|
|
// value of 0x7FFFFFFF (in the year 2038). Again, these values are handled
|
|
// correctly as well.
|
|
|
|
if ((year < 1969) || (year > 2038)) {
|
|
return (time_t)0;
|
|
}
|
|
|
|
SYSTEMTIME *pst = fStartDST ? &ptzi->DaylightDate : &ptzi->StandardDate;
|
|
|
|
// WORD wYear Year (0000 == 0)
|
|
// WORD wMonth Month (January == 1)
|
|
// WORD wDayOfWeek Day of week (Sunday == 0)
|
|
// WORD wDay Month day (1 - 31)
|
|
// WORD wHour Hour (0 - 23)
|
|
// WORD wMinute Minute (0 - 59)
|
|
// WORD wSecond Second (0 - 59)
|
|
// WORD wMilliseconds Milliseconds (0 - 999)
|
|
|
|
// Compute the number of days since 1/1/1970 to the beginning of this year.
|
|
long daysToYear = ((year - 1970) * 365) // Tally up previous years.
|
|
+ ((year - 1969) >> 2); // Add few extra for the leap years.
|
|
|
|
// Compute the number of days since the beginning of this year to the
|
|
// beginning of the month. We will add to this value to get the actual
|
|
// year day.
|
|
long yearDay = IS_LEAP_YEAR(year) ? M2LYD[pst->wMonth - 1] :
|
|
M2YD [pst->wMonth - 1];
|
|
|
|
// Check for day-in-month format.
|
|
if (pst->wYear == 0) {
|
|
|
|
// Compute the week day for the first day of the month (Sunday == 0).
|
|
long monthDOW = (daysToYear + yearDay + BASE_DOW) % 7;
|
|
|
|
// Add the day offset of the transition day to the year day.
|
|
if (monthDOW < pst->wDayOfWeek) {
|
|
yearDay += (pst->wDayOfWeek - monthDOW) + (pst->wDay - 1) * 7;
|
|
} else {
|
|
yearDay += (pst->wDayOfWeek - monthDOW) + pst->wDay * 7;
|
|
}
|
|
|
|
// It is possible that we overshot the month, especially if pst->wDay
|
|
// is 5 (which means the last instance of the day in the month). Check
|
|
// if the year-day has exceeded the month and adjust accordingly.
|
|
if ((pst->wDay == 5) &&
|
|
(yearDay >= (IS_LEAP_YEAR(year) ? M2LYD[pst->wMonth] :
|
|
M2YD [pst->wMonth])))
|
|
{
|
|
yearDay -= 7;
|
|
}
|
|
|
|
// If not day-in-month format, then we assume an absolute date.
|
|
} else {
|
|
|
|
// Simply add the month day to the current year day.
|
|
yearDay += pst->wDay - 1;
|
|
}
|
|
|
|
// Tally up all our days, hours, minutes, and seconds since 1970.
|
|
long seconds = ((SECONDS_IN_A_DAY * (daysToYear + yearDay)) +
|
|
(3600L * (long)pst->wHour) +
|
|
(60L * (long)pst->wMinute) +
|
|
(long)pst->wSecond);
|
|
|
|
// If we are checking for the end of DST, then we need to add the DST bias
|
|
// since we are in DST when we chack this time stamp.
|
|
if (!fStartDST) {
|
|
seconds += ptzi->DaylightBias * 60L;
|
|
}
|
|
|
|
return (time_t)seconds;
|
|
}
|
|
|
|
//******************************************************************************
|
|
static BOOL IsDST(TIME_ZONE_INFORMATION *ptzi, time_t localTime) {
|
|
|
|
// If either of the months is 0, then this usually means that the time zone
|
|
// does not use DST. Unfortunately, Windows CE since it has a bug where it
|
|
// never really fills in these fields with the correct values, so it appears
|
|
// like we are never in DST. This is supposed to be fixed in future releases,
|
|
// so hopefully this code will get some use then.
|
|
if ((ptzi->StandardDate.wMonth == 0) || (ptzi->DaylightDate.wMonth == 0)) {
|
|
return FALSE;
|
|
}
|
|
|
|
// time_t is a 32-bit value for the seconds since January 1, 1970
|
|
// FILETIME is a 64-bit value for the number of 100-nanosecond intervals
|
|
// since January 1, 1601
|
|
|
|
// Compute the FILETIME for the given local time.
|
|
DWORDLONG dwl = ((DWORDLONG)116444736000000000 +
|
|
((DWORDLONG)localTime * (DWORDLONG)10000000));
|
|
FILETIME ft = *(FILETIME*)&dwl;
|
|
|
|
// Convert the FILETIME to a SYSTEMTIME.
|
|
SYSTEMTIME st;
|
|
ZeroMemory(&st, sizeof(st));
|
|
FileTimeToSystemTime(&ft, &st);
|
|
|
|
// Get our start and end daylight savings times.
|
|
time_t timeStart = GetTransitionTimeT(ptzi, (int)st.wYear, TRUE);
|
|
time_t timeEnd = GetTransitionTimeT(ptzi, (int)st.wYear, FALSE);
|
|
|
|
// Check what hemisphere we are in.
|
|
if (timeStart < timeEnd) {
|
|
|
|
// Northern hemisphere ordering.
|
|
return ((localTime >= timeStart) && (localTime < timeEnd));
|
|
|
|
} else if (timeStart > timeEnd) {
|
|
|
|
// Southern hemisphere ordering.
|
|
return ((localTime < timeEnd) || (localTime >= timeStart));
|
|
}
|
|
|
|
// If timeStart equals timeEnd then this time zone does not support DST.
|
|
return FALSE;
|
|
}
|
|
|
|
#endif // _WIN32_WCE
|
|
|
|
//******************************************************************************
|
|
//***** Functions to supply timezone information from the Windows registry to
|
|
//***** Info-ZIP's private RTL "localtime() et al." replacements in timezone.c.
|
|
//******************************************************************************
|
|
|
|
//******************************************************************************
|
|
// Copied from win32.c
|
|
#ifdef W32_USE_IZ_TIMEZONE
|
|
#include "timezone.h"
|
|
#define SECSPERMIN 60
|
|
#define MINSPERHOUR 60
|
|
#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
|
|
static void conv_to_rule(LPSYSTEMTIME lpw32tm, struct rule * ZCONST ptrule);
|
|
|
|
static void conv_to_rule(LPSYSTEMTIME lpw32tm, struct rule * ZCONST ptrule)
|
|
{
|
|
if (lpw32tm->wYear != 0) {
|
|
ptrule->r_type = JULIAN_DAY;
|
|
ptrule->r_day = ydays[lpw32tm->wMonth - 1] + lpw32tm->wDay;
|
|
} else {
|
|
ptrule->r_type = MONTH_NTH_DAY_OF_WEEK;
|
|
ptrule->r_mon = lpw32tm->wMonth;
|
|
ptrule->r_day = lpw32tm->wDayOfWeek;
|
|
ptrule->r_week = lpw32tm->wDay;
|
|
}
|
|
ptrule->r_time = (long)lpw32tm->wHour * SECSPERHOUR +
|
|
(long)(lpw32tm->wMinute * SECSPERMIN) +
|
|
(long)lpw32tm->wSecond;
|
|
}
|
|
|
|
int GetPlatformLocalTimezone(register struct state * ZCONST sp,
|
|
void (*fill_tzstate_from_rules)(struct state * ZCONST sp_res,
|
|
ZCONST struct rule * ZCONST start,
|
|
ZCONST struct rule * ZCONST end))
|
|
{
|
|
TIME_ZONE_INFORMATION tzinfo;
|
|
DWORD res;
|
|
|
|
/* read current timezone settings from registry if TZ envvar missing */
|
|
res = GetTimeZoneInformation(&tzinfo);
|
|
if (res != TIME_ZONE_ID_INVALID)
|
|
{
|
|
struct rule startrule, stoprule;
|
|
|
|
conv_to_rule(&(tzinfo.StandardDate), &stoprule);
|
|
conv_to_rule(&(tzinfo.DaylightDate), &startrule);
|
|
sp->timecnt = 0;
|
|
sp->ttis[0].tt_abbrind = 0;
|
|
if ((sp->charcnt =
|
|
WideCharToMultiByte(CP_ACP, 0, tzinfo.StandardName, -1,
|
|
sp->chars, sizeof(sp->chars), NULL, NULL))
|
|
== 0)
|
|
sp->chars[sp->charcnt++] = '\0';
|
|
sp->ttis[1].tt_abbrind = sp->charcnt;
|
|
sp->charcnt +=
|
|
WideCharToMultiByte(CP_ACP, 0, tzinfo.DaylightName, -1,
|
|
sp->chars + sp->charcnt,
|
|
sizeof(sp->chars) - sp->charcnt, NULL, NULL);
|
|
if ((sp->charcnt - sp->ttis[1].tt_abbrind) == 0)
|
|
sp->chars[sp->charcnt++] = '\0';
|
|
sp->ttis[0].tt_gmtoff = - (tzinfo.Bias + tzinfo.StandardBias)
|
|
* MINSPERHOUR;
|
|
sp->ttis[1].tt_gmtoff = - (tzinfo.Bias + tzinfo.DaylightBias)
|
|
* MINSPERHOUR;
|
|
sp->ttis[0].tt_isdst = 0;
|
|
sp->ttis[1].tt_isdst = 1;
|
|
sp->typecnt = (startrule.r_mon == 0 && stoprule.r_mon == 0) ? 1 : 2;
|
|
|
|
if (sp->typecnt > 1)
|
|
(*fill_tzstate_from_rules)(sp, &startrule, &stoprule);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#endif /* W32_USE_IZ_TIMEZONE */
|