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kolibrios-fun/programs/fs/unzip60/wince/wince.cpp

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unzip initial commit git-svn-id: svn://kolibrios.org@6725 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-11-18 14:40:05 +01:00
/*
Copyright (c) 1990-2003 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2000-Apr-09 or later
(the contents of which are also included in unzip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
*/
//******************************************************************************
//
// File: WINCE.CPP
//
// Description: This file implements all the Win32 APIs and C runtime functions
// that the Info-ZIP code calls, but are not implemented natively
// on Windows CE.
//
// Copyright: All the source files for Pocket UnZip, except for components
// written by the Info-ZIP group, are copyrighted 1997 by Steve P.
// Miller. The product "Pocket UnZip" itself is property of the
// author and cannot be altered in any way without written consent
// from Steve P. Miller.
//
// Disclaimer: All project files are provided "as is" with no guarantee of
// their correctness. The authors are not liable for any outcome
// that is the result of using this source. The source for Pocket
// UnZip has been placed in the public domain to help provide an
// understanding of its implementation. You are hereby granted
// full permission to use this source in any way you wish, except
// to alter Pocket UnZip itself. For comments, suggestions, and
// bug reports, please write to stevemil@pobox.com.
//
// Functions: DebugOut
// chmod
// close
// isatty
// lseek
// open
// read
// setmode
// unlink
// fflush
// fgets
// fileno
// fopen
// fprintf
// fclose
// putc
// sprintf
// _stricmp
// _strupr
// strrchr (non-_MBCS only)
// isupper
// stat
// localtime
//
// Internal helper functions:
// SafeGetTimeZoneInformation
// GetTransitionTimeT
// IsDST
//
//
// Date Name History
// -------- ------------ -----------------------------------------------------
// 02/01/97 Steve Miller Created (Version 1.0 using Info-ZIP UnZip 5.30)
//
//******************************************************************************
extern "C" {
#define __WINCE_CPP
#define UNZIP_INTERNAL
#include "unzip.h"
}
#include <tchar.h> // Must be outside of extern "C" block
//******************************************************************************
//***** For all platforms - Our debug output function
//******************************************************************************
#ifdef DEBUG // RETAIL version is __inline and does not generate any code.
void DebugOut(LPCTSTR szFormat, ...) {
TCHAR szBuffer[512] = TEXT("PUNZIP: ");
va_list pArgs;
va_start(pArgs, szFormat);
_vsntprintf(szBuffer + 8, countof(szBuffer) - 10, szFormat, pArgs);
va_end(pArgs);
TCHAR *psz = szBuffer;
while (psz = _tcschr(psz, TEXT('\n'))) {
*psz = TEXT('|');
}
psz = szBuffer;
while (psz = _tcschr(psz, TEXT('\r'))) {
*psz = TEXT('|');
}
_tcscat(szBuffer, TEXT("\r\n"));
OutputDebugString(szBuffer);
}
#endif // DEBUG
//******************************************************************************
//***** Windows CE Native
//******************************************************************************
#if defined(_WIN32_WCE)
//******************************************************************************
//***** Local Function Prototyopes
//******************************************************************************
static void SafeGetTimeZoneInformation(TIME_ZONE_INFORMATION *ptzi);
static time_t GetTransitionTimeT(TIME_ZONE_INFORMATION *ptzi,
int year, BOOL fStartDST);
static BOOL IsDST(TIME_ZONE_INFORMATION *ptzi, time_t localTime);
//******************************************************************************
//***** IO.H functions
//******************************************************************************
//-- Called from fileio.c
int __cdecl chmod(const char *filename, int pmode) {
// Called before unlink() to delete read-only files.
DWORD dwAttribs = (pmode & _S_IWRITE) ? FILE_ATTRIBUTE_NORMAL : FILE_ATTRIBUTE_READONLY;
TCHAR szPath[_MAX_PATH];
MBSTOTSTR(szPath, filename, countof(szPath));
return (SetFileAttributes(szPath, dwAttribs) ? 0 : -1);
}
//******************************************************************************
//-- Called from process.c
int __cdecl close(int handle) {
return (CloseHandle((HANDLE)handle) ? 0 : -1);
}
//******************************************************************************
//-- Called from fileio.c
int __cdecl isatty(int handle) {
// returns TRUE if handle is a terminal, console, printer, or serial port
// called with 1 (stdout) and 2 (stderr)
return 0;
}
//******************************************************************************
//-- Called from extract.c, fileio.c, process.c
long __cdecl lseek(int handle, long offset, int origin) {
// SEEK_SET, SEEK_CUR, SEEK_END are equal to FILE_BEGIN, FILE_CURRENT, FILE_END
return SetFilePointer((HANDLE)handle, offset, NULL, origin);
}
//******************************************************************************
//-- Called from fileio.c
int __cdecl open(const char *filename, int oflags, ...) {
// The Info-Zip code currently only opens existing ZIP files for read
// using open().
DWORD dwAccess = 0;
DWORD dwCreate = 0;
switch (oflags & (_O_RDONLY | _O_WRONLY | _O_RDWR)) {
case _O_RDONLY:
dwAccess = GENERIC_READ;
break;
case _O_WRONLY:
dwAccess = GENERIC_WRITE;
break;
case _O_RDWR:
dwAccess = GENERIC_READ | GENERIC_WRITE;
break;
}
switch (oflags & (O_CREAT | O_TRUNC)) {
case _O_CREAT:
dwCreate = OPEN_ALWAYS;
break;
case _O_CREAT | _O_TRUNC:
dwCreate = CREATE_ALWAYS;
break;
default:
dwCreate = OPEN_EXISTING;
break;
}
TCHAR szPath[_MAX_PATH];
MBSTOTSTR(szPath, filename, countof(szPath));
HANDLE hFile = CreateFile(szPath, dwAccess,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, dwCreate, FILE_ATTRIBUTE_NORMAL, NULL);
if ((hFile != INVALID_HANDLE_VALUE) && ((oflags & O_APPEND) == O_APPEND)) {
SetFilePointer(hFile, 0, NULL, FILE_END);
}
return ((hFile == INVALID_HANDLE_VALUE) ? -1 : (int)hFile);
}
//******************************************************************************
//-- Called from extract.c, fileio.c, process.c
int __cdecl read(int handle, void *buffer, unsigned int count) {
DWORD dwRead = 0;
return (ReadFile((HANDLE)handle, buffer, count, &dwRead, NULL) ? dwRead : -1);
}
#if _WIN32_WCE < 211
//******************************************************************************
//-- Called from extract.c
int __cdecl setmode(int handle, int mode) {
//TEXT/BINARY translation - currently always called with O_BINARY.
return O_BINARY;
}
#endif
//******************************************************************************
//-- Called from fileio.c
int __cdecl unlink(const char *filename) {
// Called to delete files before an extract overwrite.
TCHAR szPath[_MAX_PATH];
MBSTOTSTR(szPath, filename, countof(szPath));
return (DeleteFile(szPath) ? 0: -1);
}
//******************************************************************************
//***** STDIO.H functions
//******************************************************************************
#if _WIN32_WCE < 211
// Old versions of Win CE prior to 2.11 do not support stdio library functions.
// We provide simplyfied replacements that are more or less copies of the
// UNIX style low level I/O API functions. Only unbuffered I/O in binary mode
// is supported.
//-- Called from fileio.c
int __cdecl fflush(FILE *stream) {
return (FlushFileBuffers((HANDLE)stream) ? 0 : EOF);
}
//******************************************************************************
//-- Called from extract.c
char * __cdecl fgets(char *string, int n, FILE *stream) {
// stream always equals "stdin" and fgets() should never be called.
DebugOut(TEXT("WARNING: fgets(0x%08X, %d, %08X) called."), string, n, stream);
return NULL;
}
//******************************************************************************
//-- Called from extract.c
int __cdecl fileno(FILE *stream) {
return (int)stream;
}
//******************************************************************************
//-- Called from fileio.c
FILE * __cdecl fopen(const char *filename, const char *mode) {
// fopen() is used to create all extracted files.
DWORD dwAccess = 0;
DWORD dwCreate = 0;
BOOL fAppend = FALSE;
if (strstr(mode, "r+")) {
dwAccess = GENERIC_READ | GENERIC_WRITE;
dwCreate = OPEN_EXISTING;
} else if (strstr(mode, "w+")) {
dwAccess = GENERIC_READ | GENERIC_WRITE;
dwCreate = CREATE_ALWAYS;
} else if (strstr(mode, "a+")) {
dwAccess = GENERIC_READ | GENERIC_WRITE;
dwCreate = OPEN_ALWAYS;
fAppend = TRUE;
} else if (strstr(mode, "r")) {
dwAccess = GENERIC_READ;
dwCreate = OPEN_EXISTING;
} else if (strstr(mode, "w")) {
dwAccess = GENERIC_WRITE;
dwCreate = CREATE_ALWAYS;
} else if (strstr(mode, "a")) {
dwAccess = GENERIC_WRITE;
dwCreate = OPEN_ALWAYS;
fAppend = TRUE;
}
TCHAR szPath[_MAX_PATH];
MBSTOTSTR(szPath, filename, countof(szPath));
HANDLE hFile = CreateFile(szPath, dwAccess,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, dwCreate, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
return NULL;
}
if (fAppend) {
SetFilePointer(hFile, 0, NULL, FILE_END);
}
return (FILE*)hFile;
}
//******************************************************************************
//-- Called from many sources when compiled for DEBUG
int __cdecl fprintf(FILE *stream, const char *format, ...) {
// All standard output/error in Info-ZIP is handled through fprintf()
if ((stream == stdout) || (stream == stderr)) {
return 1;
}
// "stream" always equals "stderr" or "stdout" - log error if we see otherwise.
#ifdef UNICODE
DebugOut(TEXT("WARNING: fprintf(0x%08X, \"%S\", ...) called."), stream, format);
#else
DebugOut(TEXT("WARNING: fprintf(0x%08X, \"%s\", ...) called."), stream, format);
#endif
return 0;
}
//******************************************************************************
//-- Called from fileio.c
int __cdecl fclose(FILE *stream) {
return (CloseHandle((HANDLE)stream) ? 0 : EOF);
}
//******************************************************************************
//-- Called from fileio.c
int __cdecl putc(int c, FILE *stream) {
DebugOut(TEXT("WARNING: putc(%d, 0x%08X) called."), c, stream);
return 0;
}
//******************************************************************************
//-- Called from intrface.cpp, extract.c, fileio.c, list.c, process.c
int __cdecl sprintf(char *buffer, const char *format, ...) {
WCHAR wszBuffer[512], wszFormat[512];
MBSTOTSTR(wszFormat, format, countof(wszFormat));
BOOL fPercent = FALSE;
for (WCHAR *pwsz = wszFormat; *pwsz; pwsz++) {
if (*pwsz == L'%') {
fPercent = !fPercent;
} else if (fPercent && (((*pwsz >= L'a') && (*pwsz <= L'z')) ||
((*pwsz >= L'A') && (*pwsz <= L'Z'))))
{
if (*pwsz == L's') {
*pwsz = L'S';
} else if (*pwsz == L'S') {
*pwsz = L's';
}
fPercent = FALSE;
}
}
va_list pArgs;
va_start(pArgs, format);
_vsntprintf(wszBuffer, countof(wszBuffer), wszFormat, pArgs);
va_end(pArgs);
TSTRTOMBS(buffer, wszBuffer, countof(wszBuffer));
return 0;
}
#endif /* _WIN32_WCE < 211 */
#ifndef POCKET_UNZIP
//******************************************************************************
//-- Called from unzip.c
void __cdecl perror(const char* errorText)
{
OutputDebugString((LPCTSTR)errorText);
}
#endif // !POCKET_UNZIP
#ifdef USE_FWRITE
//******************************************************************************
//-- Called from fileio.c
void __cdecl setbuf(FILE *, char *)
{
// We are using fwrite and the call to setbuf was to set the stream
// unbuffered which is the default behaviour, we have nothing to do.
}
#endif // USE_FWRITE
//******************************************************************************
//***** STDLIB.H functions
//******************************************************************************
#ifdef _MBCS
int __cdecl mblen(const char *mbc, size_t mbszmax)
{
// very simple cooked-down version of mblen() without any error handling
// (Windows CE does not support multibyte charsets with a maximum char
// length > 2 bytes)
return (IsDBCSLeadByte((BYTE)*mbc) ? 2 : 1);
}
#endif /* _MBCS */
//******************************************************************************
//***** STRING.H functions
//******************************************************************************
//-- Called from winmain.cpp
int __cdecl _stricmp(const char *string1, const char *string2) {
while (*string1 && ((*string1 | 0x20) == (*string2 | 0x20))) {
string1++;
string2++;
}
return (*string1 - *string2);
}
//******************************************************************************
//-- Called from intrface.cpp and winmain.cpp
char* __cdecl _strupr(char *string) {
while (*string) {
if ((*string >= 'a') && (*string <= 'z')) {
*string -= 'a' - 'A';
}
string++;
}
return string;
}
//******************************************************************************
//-- Called from fileio.c ("open_input_file()")
char* __cdecl strerror(int errnum) {
return "[errmsg not available]";
}
#ifndef _MBCS
//******************************************************************************
//-- Called from winmain.cpp
char* __cdecl strrchr(const char *string, int c) {
// Walk to end of string.
for (char *p = (char*)string; *p; p++) {
}
// Walk backwards looking for character.
for (p--; p >= string; p--) {
if ((int)*p == c) {
return p;
}
}
return NULL;
}
#endif /* !_MBCS */
//******************************************************************************
//***** CTYPE.H functions
//******************************************************************************
#if _WIN32_WCE < 300
int __cdecl isupper(int c) {
return ((c >= 'A') && (c <= 'Z'));
}
#endif
//******************************************************************************
//***** STAT.H functions
//******************************************************************************
//-- Called fileio.c, process.c, intrface.cpp
int __cdecl stat(const char *path, struct stat *buffer) {
// stat() is called on both the ZIP files and extracted files.
// Clear our stat buffer to be safe.
ZeroMemory(buffer, sizeof(struct stat));
// Find the file/direcotry and fill in a WIN32_FIND_DATA structure.
WIN32_FIND_DATA w32fd;
ZeroMemory(&w32fd, sizeof(w32fd));
TCHAR szPath[_MAX_PATH];
MBSTOTSTR(szPath, path, countof(szPath));
HANDLE hFind = FindFirstFile(szPath, &w32fd);
// Bail out now if we could not find the file/directory.
if (hFind == INVALID_HANDLE_VALUE) {
return -1;
}
// Close the find.
FindClose(hFind);
// Mode flags that are currently used: S_IWRITE, S_IFMT, S_IFDIR, S_IEXEC
if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
buffer->st_mode = _S_IFDIR | _S_IREAD | _S_IEXEC;
} else {
buffer->st_mode = _S_IFREG | _S_IREAD;
}
if (!(w32fd.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
buffer->st_mode |= _S_IWRITE;
}
// Store the file size.
buffer->st_size = (_off_t)w32fd.nFileSizeLow;
// Convert the modified FILETIME to a time_t and store it.
DWORDLONG dwl = *(DWORDLONG*)&w32fd.ftLastWriteTime;
buffer->st_mtime = (time_t)((dwl - (DWORDLONG)116444736000000000) / (DWORDLONG)10000000);
return 0;
}
//******************************************************************************
//***** TIME.H functions
//******************************************************************************
// Evaluates to TRUE if 'y' is a leap year, otherwise FALSE
// #define IS_LEAP_YEAR(y) ((((y) % 4 == 0) && ((y) % 100 != 0)) || ((y) % 400 == 0))
// The macro below is a reduced version of the above macro. It is valid for
// years between 1901 and 2099 which easily includes all years representable
// by the current implementation of time_t.
#define IS_LEAP_YEAR(y) (((y) & 3) == 0)
#define BASE_DOW 4 // 1/1/1970 was a Thursday.
#define SECONDS_IN_A_DAY (24L * 60L * 60L) // Number of seconds in one day.
// Month to Year Day conversion array.
int M2YD[] = {
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 */
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