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transmission/third-party/shttpd/compat_wince.c

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/*
vi:ts=8:sw=8:noet
* Copyright (c) 2006 Luke Dunstan <infidel@users.sourceforge.net>
* Partly based on code by David Kashtan, Validus Medical Systems
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* This file provides various functions that are available on desktop Windows
* but not on Windows CE
*/
#ifdef _MSC_VER
/* Level 4 warnings caused by windows.h */
#pragma warning(disable : 4214) // nonstandard extension used : bit field types other than int
#pragma warning(disable : 4115) // named type definition in parentheses
#pragma warning(disable : 4201) // nonstandard extension used : nameless struct/union
#pragma warning(disable : 4514) // unreferenced inline function has been removed
#pragma warning(disable : 4244) // conversion from 'int ' to 'unsigned short ', possible loss of data
#pragma warning(disable : 4100) // unreferenced formal parameter
#endif
#include <windows.h>
#include <stdlib.h>
#include "compat_wince.h"
static WCHAR *to_wide_string(LPCSTR pStr)
{
int nwide;
WCHAR *buf;
if(pStr == NULL)
return NULL;
nwide = MultiByteToWideChar(CP_ACP, 0, pStr, -1, NULL, 0);
if(nwide == 0)
return NULL;
buf = malloc(nwide * sizeof(WCHAR));
if(buf == NULL) {
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return NULL;
}
if(MultiByteToWideChar(CP_ACP, 0, pStr, -1, buf, nwide) == 0) {
free(buf);
return NULL;
}
return buf;
}
FILE *fdopen(int handle, const char *mode)
{
WCHAR *wmode = to_wide_string(mode);
FILE *result;
if(wmode != NULL)
result = _wfdopen((void *)handle, wmode);
else
result = NULL;
free(wmode);
return result;
}
/*
* Time conversion constants
*/
#define FT_EPOCH (116444736000000000i64)
#define FT_TICKS (10000000i64)
/*
* Convert a FILETIME to a time_t
*/
static time_t convert_FILETIME_to_time_t(FILETIME *File_Time)
{
__int64 Temp;
/*
* Convert the FILETIME structure to 100nSecs since 1601 (as a 64-bit value)
*/
Temp = (((__int64)File_Time->dwHighDateTime) << 32) + (__int64)File_Time->dwLowDateTime;
/*
* Convert to seconds from 1970
*/
return((time_t)((Temp - FT_EPOCH) / FT_TICKS));
}
/*
* Convert a FILETIME to a tm structure
*/
static struct tm *Convert_FILETIME_To_tm(FILETIME *File_Time)
{
SYSTEMTIME System_Time;
static struct tm tm = {0};
static const short Day_Of_Year_By_Month[12] = {(short)(0),
(short)(31),
(short)(31 + 28),
(short)(31 + 28 + 31),
(short)(31 + 28 + 31 + 30),
(short)(31 + 28 + 31 + 30 + 31),
(short)(31 + 28 + 31 + 30 + 31 + 30),
(short)(31 + 28 + 31 + 30 + 31 + 30 + 31),
(short)(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31),
(short)(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30),
(short)(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31),
(short)(31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30)};
/*
* Turn the FILETIME into a SYSTEMTIME
*/
FileTimeToSystemTime(File_Time, &System_Time);
/*
* Use SYSTEMTIME to fill in the tm structure
*/
tm.tm_sec = System_Time.wSecond;
tm.tm_min = System_Time.wMinute;
tm.tm_hour = System_Time.wHour;
tm.tm_mday = System_Time.wDay;
tm.tm_mon = System_Time.wMonth - 1;
tm.tm_year = System_Time.wYear - 1900;
tm.tm_wday = System_Time.wDayOfWeek;
tm.tm_yday = Day_Of_Year_By_Month[tm.tm_mon] + tm.tm_mday - 1;
if (tm.tm_mon >= 2) {
/*
* Check for leap year (every 4 years but not every 100 years but every 400 years)
*/
if ((System_Time.wYear % 4) == 0) {
/*
* It Is a 4th year
*/
if ((System_Time.wYear % 100) == 0) {
/*
* It is a 100th year
*/
if ((System_Time.wYear % 400) == 0) {
/*
* It is a 400th year: It is a leap year
*/
tm.tm_yday++;
}
} else {
/*
* It is not a 100th year: It is a leap year
*/
tm.tm_yday++;
}
}
}
return(&tm);
}
/*
* Convert a time_t to a FILETIME
*/
static void Convert_time_t_To_FILETIME(time_t Time, FILETIME *File_Time)
{
__int64 Temp;
/*
* Use 64-bit calculation to convert seconds since 1970 to
* 100nSecs since 1601
*/
Temp = ((__int64)Time * FT_TICKS) + FT_EPOCH;
/*
* Put it into the FILETIME structure
*/
File_Time->dwLowDateTime = (DWORD)Temp;
File_Time->dwHighDateTime = (DWORD)(Temp >> 32);
}
/*
* Convert a tm structure to a FILETIME
*/
static FILETIME *Convert_tm_To_FILETIME(struct tm *tm)
{
SYSTEMTIME System_Time;
static FILETIME File_Time = {0};
/*
* Use the tm structure to fill in a SYSTEM
*/
System_Time.wYear = tm->tm_year + 1900;
System_Time.wMonth = tm->tm_mon + 1;
System_Time.wDayOfWeek = tm->tm_wday;
System_Time.wDay = tm->tm_mday;
System_Time.wHour = tm->tm_hour;
System_Time.wMinute = tm->tm_min;
System_Time.wSecond = tm->tm_sec;
System_Time.wMilliseconds = 0;
/*
* Convert it to a FILETIME and return it
*/
SystemTimeToFileTime(&System_Time, &File_Time);
return(&File_Time);
}
/************************************************************************/
/* */
/* Errno emulation: There is no errno on Windows/CE and we need */
/* to make it per-thread. So we have a function */
/* that returns a pointer to the errno for the */
/* current thread. */
/* */
/* If there is ONLY the main thread then we can */
/* quickly return some static storage. */
/* */
/* If we have multiple threads running, we use */
/* Thread-Local Storage to hold the pointer */
/* */
/************************************************************************/
/*
* Function pointer for returning errno pointer
*/
static int *Initialize_Errno(void);
int *(*__WinCE_Errno_Pointer_Function)(void) = Initialize_Errno;
/*
* Static errno storage for the main thread
*/
static int Errno_Storage = 0;
/*
* Thread-Local storage slot for errno
*/
static int TLS_Errno_Slot = 0xffffffff;
/*
* Number of threads we have running and critical section protection
* for manipulating it
*/
static int Number_Of_Threads = 0;
static CRITICAL_SECTION Number_Of_Threads_Critical_Section;
/*
* For the main thread only -- return the errno pointer
*/
static int *Get_Main_Thread_Errno(void)
{
return &Errno_Storage;
}
/*
* When there is more than one thread -- return the errno pointer
*/
static int *Get_Thread_Errno(void)
{
return (int *)TlsGetValue(TLS_Errno_Slot);
}
/*
* Initialize a thread's errno
*/
static void Initialize_Thread_Errno(int *Errno_Pointer)
{
/*
* Make sure we have a slot
*/
if (TLS_Errno_Slot == 0xffffffff) {
/*
* No: Get one
*/
TLS_Errno_Slot = (int)TlsAlloc();
if (TLS_Errno_Slot == 0xffffffff) ExitProcess(3);
}
/*
* We can safely check for 0 threads, because
* only the main thread will be initializing
* at this point. Make sure the critical
* section that protects the number of threads
* is initialized
*/
if (Number_Of_Threads == 0)
InitializeCriticalSection(&Number_Of_Threads_Critical_Section);
/*
* Store the errno pointer
*/
if (TlsSetValue(TLS_Errno_Slot, (LPVOID)Errno_Pointer) == 0) ExitProcess(3);
/*
* Bump the number of threads
*/
EnterCriticalSection(&Number_Of_Threads_Critical_Section);
Number_Of_Threads++;
if (Number_Of_Threads > 1) {
/*
* We have threads other than the main thread:
* Use thread-local storage
*/
__WinCE_Errno_Pointer_Function = Get_Thread_Errno;
}
LeaveCriticalSection(&Number_Of_Threads_Critical_Section);
}
/*
* Initialize errno emulation on Windows/CE (Main thread)
*/
static int *Initialize_Errno(void)
{
/*
* Initialize the main thread's errno in thread-local storage
*/
Initialize_Thread_Errno(&Errno_Storage);
/*
* Set the errno function to be the one that returns the
* main thread's errno
*/
__WinCE_Errno_Pointer_Function = Get_Main_Thread_Errno;
/*
* Return the main thread's errno
*/
return &Errno_Storage;
}
/*
* Initialize errno emulation on Windows/CE (New thread)
*/
void __WinCE_Errno_New_Thread(int *Errno_Pointer)
{
Initialize_Thread_Errno(Errno_Pointer);
}
/*
* Note that a thread has exited
*/
void __WinCE_Errno_Thread_Exit(void)
{
/*
* Decrease the number of threads
*/
EnterCriticalSection(&Number_Of_Threads_Critical_Section);
Number_Of_Threads--;
if (Number_Of_Threads <= 1) {
/*
* We only have the main thread
*/
__WinCE_Errno_Pointer_Function = Get_Main_Thread_Errno;
}
LeaveCriticalSection(&Number_Of_Threads_Critical_Section);
}
char *
strerror(int errnum)
{
return "(strerror not implemented)";
}
#define FT_EPOCH (116444736000000000i64)
#define FT_TICKS (10000000i64)
int
_wstat(const WCHAR *path, struct _stat *buffer)
{
WIN32_FIND_DATA data;
HANDLE handle;
WCHAR *p;
/* Fail if wildcard characters are specified */
if (wcscspn(path, L"?*") != wcslen(path))
return -1;
handle = FindFirstFile(path, &data);
if (handle == INVALID_HANDLE_VALUE) {
errno = GetLastError();
return -1;
}
FindClose(handle);
/* Found: Convert the file times */
buffer->st_mtime = convert_FILETIME_to_time_t(&data.ftLastWriteTime);
if (data.ftLastAccessTime.dwLowDateTime || data.ftLastAccessTime.dwHighDateTime)
buffer->st_atime = convert_FILETIME_to_time_t(&data.ftLastAccessTime);
else
buffer->st_atime = buffer->st_mtime;
if (data.ftCreationTime.dwLowDateTime || data.ftCreationTime.dwHighDateTime)
buffer->st_ctime = convert_FILETIME_to_time_t(&data.ftCreationTime);
else
buffer->st_ctime = buffer->st_mtime;
/* Convert the file modes */
buffer->st_mode = (unsigned short)((data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? (S_IFDIR | S_IEXEC) : S_IFREG);
buffer->st_mode |= (data.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? S_IREAD : (S_IREAD | S_IWRITE);
if((p = wcsrchr(path, L'.')) != NULL) {
p++;
if (_wcsicmp(p, L".exe") == 0)
buffer->st_mode |= S_IEXEC;
}
buffer->st_mode |= (buffer->st_mode & 0700) >> 3;
buffer->st_mode |= (buffer->st_mode & 0700) >> 6;
/* Set the other information */
buffer->st_nlink = 1;
buffer->st_size = (unsigned long int)data.nFileSizeLow;
buffer->st_uid = 0;
buffer->st_gid = 0;
buffer->st_ino = 0 /*data.dwOID ?*/;
buffer->st_dev = 0;
return 0; /* success */
}
/*
* Helper function for cemodule -- do an fstat() operation on a Win32 File Handle
*/
int
_fstat(int handle, struct _stat *st)
{
BY_HANDLE_FILE_INFORMATION Data;
/*
* Get the file information
*/
if (!GetFileInformationByHandle((HANDLE)handle, &Data)) {
/*
* Return error
*/
errno = GetLastError();
return(-1);
}
/*
* Found: Convert the file times
*/
st->st_mtime=(time_t)((*(__int64*)&Data.ftLastWriteTime-FT_EPOCH)/FT_TICKS);
if(Data.ftLastAccessTime.dwLowDateTime || Data.ftLastAccessTime.dwHighDateTime)
st->st_atime=(time_t)((*(__int64*)&Data.ftLastAccessTime-FT_EPOCH)/FT_TICKS);
else
st->st_atime=st->st_mtime ;
if(Data.ftCreationTime.dwLowDateTime || Data.ftCreationTime.dwHighDateTime )
st->st_ctime=(time_t)((*(__int64*)&Data.ftCreationTime-FT_EPOCH)/FT_TICKS);
else
st->st_ctime=st->st_mtime ;
/*
* Convert the file modes
*/
st->st_mode = (unsigned short)((Data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? (S_IFDIR | S_IEXEC) : S_IFREG);
st->st_mode |= (Data.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? S_IREAD : (S_IREAD | S_IWRITE);
st->st_mode |= (st->st_mode & 0700) >> 3;
st->st_mode |= (st->st_mode & 0700) >> 6;
/*
* Set the other information
*/
st->st_nlink=1;
st->st_size=(unsigned long int)Data.nFileSizeLow;
st->st_uid=0;
st->st_gid=0;
st->st_ino=0;
st->st_dev=0;
/*
* Return success
*/
return(0);
}
int _wopen(const wchar_t *filename, int oflag, ...)
{
DWORD Access, ShareMode, CreationDisposition;
HANDLE Handle;
static int Modes[4] = {0, (GENERIC_READ | GENERIC_WRITE), GENERIC_READ, GENERIC_WRITE};
/*
* Calculate the CreateFile arguments
*/
Access = Modes[oflag & O_MODE_MASK];
ShareMode = (oflag & O_EXCL) ? 0 : (FILE_SHARE_READ | FILE_SHARE_WRITE);
if (oflag & O_TRUNC)
CreationDisposition = (oflag & O_CREAT) ? CREATE_ALWAYS : TRUNCATE_EXISTING;
else
CreationDisposition = (oflag & O_CREAT) ? CREATE_NEW : OPEN_EXISTING;
Handle = CreateFileW(filename, Access, ShareMode, NULL, CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
/*
* Deal with errors
*/
if (Handle == INVALID_HANDLE_VALUE) {
errno = GetLastError();
if ((errno == ERROR_ALREADY_EXISTS) || (errno == ERROR_FILE_EXISTS))
errno = ERROR_ALREADY_EXISTS;
return -1;
}
/*
* Return the handle
*/
return (int)Handle;
}
int
_close(int handle)
{
if(CloseHandle((HANDLE)handle))
return 0;
errno = GetLastError();
return -1;
}
int
_write(int handle, const void *buffer, unsigned int count)
{
DWORD numwritten = 0;
if(!WriteFile((HANDLE)handle, buffer, count, &numwritten, NULL)) {
errno = GetLastError();
return -1;
}
return numwritten;
}
int
_read(int handle, void *buffer, unsigned int count)
{
DWORD numread = 0;
if(!ReadFile((HANDLE)handle, buffer, count, &numread, NULL)) {
errno = GetLastError();
return -1;
}
return numread;
}
long
_lseek(int handle, long offset, int origin)
{
DWORD dwMoveMethod;
DWORD result;
switch(origin) {
default:
errno = EINVAL;
return -1L;
case SEEK_SET:
dwMoveMethod = FILE_BEGIN;
break;
case SEEK_CUR:
dwMoveMethod = FILE_CURRENT;
break;
case SEEK_END:
dwMoveMethod = FILE_END;
break;
}
result = SetFilePointer((HANDLE)handle, offset, NULL, dwMoveMethod);
if(result == 0xFFFFFFFF) {
errno = GetLastError();
return -1;
}
return (long)result;
}
int
_wmkdir(const wchar_t *dirname)
{
if(!CreateDirectoryW(dirname, NULL)) {
errno = GetLastError();
return -1;
}
return 0;
}
int
_wremove(const wchar_t *filename)
{
if(!DeleteFileW(filename)) {
errno = GetLastError();
return -1;
}
return 0;
}
int
_wrename(const wchar_t *oldname, const wchar_t *newname)
{
if(!MoveFileW(oldname, newname)) {
errno = GetLastError();
return -1;
}
return 0;
}
wchar_t *
_wgetcwd(wchar_t *buffer, int maxlen)
{
wchar_t *result;
WCHAR wszPath[MAX_PATH + 1];
WCHAR *p;
if(!GetModuleFileNameW(NULL, wszPath, MAX_PATH + 1)) {
errno = GetLastError();
return NULL;
}
/* Remove the filename part of the path to leave the directory */
p = wcsrchr(wszPath, L'\\');
if(p)
*p = L'\0';
if(buffer == NULL)
result = _wcsdup(wszPath);
else if(wcslen(wszPath) + 1 > (size_t)maxlen) {
result = NULL;
errno = ERROR_INSUFFICIENT_BUFFER;
} else {
wcsncpy(buffer, wszPath, maxlen);
buffer[maxlen - 1] = L'\0';
result = buffer;
}
return result;
}
/*
* The missing "C" runtime gmtime() function
*/
struct tm *gmtime(const time_t *TimeP)
{
FILETIME File_Time;
/*
* Deal with null time pointer
*/
if (!TimeP) return(NULL);
/*
* time_t -> FILETIME -> tm
*/
Convert_time_t_To_FILETIME(*TimeP, &File_Time);
return(Convert_FILETIME_To_tm(&File_Time));
}
/*
* The missing "C" runtime localtime() function
*/
struct tm *localtime(const time_t *TimeP)
{
FILETIME File_Time, Local_File_Time;
/*
* Deal with null time pointer
*/
if (!TimeP) return(NULL);
/*
* time_t -> FILETIME -> Local FILETIME -> tm
*/
Convert_time_t_To_FILETIME(*TimeP, &File_Time);
FileTimeToLocalFileTime(&File_Time, &Local_File_Time);
return(Convert_FILETIME_To_tm(&Local_File_Time));
}
/*
* The missing "C" runtime mktime() function
*/
time_t mktime(struct tm *tm)
{
FILETIME *Local_File_Time;
FILETIME File_Time;
/*
* tm -> Local FILETIME -> FILETIME -> time_t
*/
Local_File_Time = Convert_tm_To_FILETIME(tm);
LocalFileTimeToFileTime(Local_File_Time, &File_Time);
return(convert_FILETIME_to_time_t(&File_Time));
}
/*
* Missing "C" runtime time() function
*/
time_t time(time_t *TimeP)
{
SYSTEMTIME System_Time;
FILETIME File_Time;
time_t Result;
/*
* Get the current system time
*/
GetSystemTime(&System_Time);
/*
* SYSTEMTIME -> FILETIME -> time_t
*/
SystemTimeToFileTime(&System_Time, &File_Time);
Result = convert_FILETIME_to_time_t(&File_Time);
/*
* Return the time_t
*/
if (TimeP) *TimeP = Result;
return(Result);
}
static char Standard_Name[32] = "GMT";
static char Daylight_Name[32] = "GMT";
char *tzname[2] = {Standard_Name, Daylight_Name};
long timezone = 0;
int daylight = 0;
void tzset(void)
{
TIME_ZONE_INFORMATION Info;
int Result;
/*
* Get our current timezone information
*/
Result = GetTimeZoneInformation(&Info);
switch(Result) {
/*
* We are on standard time
*/
case TIME_ZONE_ID_STANDARD:
daylight = 0;
break;
/*
* We are on daylight savings time
*/
case TIME_ZONE_ID_DAYLIGHT:
daylight = 1;
break;
/*
* We don't know the timezone information (leave it GMT)
*/
default: return;
}
/*
* Extract the timezone information
*/
timezone = Info.Bias * 60;
if (Info.StandardName[0])
WideCharToMultiByte(CP_ACP, 0, Info.StandardName, -1, Standard_Name, sizeof(Standard_Name) - 1, NULL, NULL);
if (Info.DaylightName[0])
WideCharToMultiByte(CP_ACP, 0, Info.DaylightName, -1, Daylight_Name, sizeof(Daylight_Name) - 1, NULL, NULL);
}
/*** strftime() from newlib libc/time/strftime.c ***/
/*
* Sane snprintf(). Acts like snprintf(), but never return -1 or the
* value bigger than supplied buffer.
*/
static int
Snprintf(char *buf, size_t buflen, const char *fmt, ...)
{
va_list ap;
int n;
if (buflen == 0)
return (0);
va_start(ap, fmt);
n = _vsnprintf(buf, buflen, fmt, ap);
va_end(ap);
if (n < 0 || n > (int) buflen - 1) {
n = buflen - 1;
}
buf[n] = '\0';
return (n);
}
#define snprintf Snprintf
/* from libc/include/_ansi.h */
#define _CONST const
#define _DEFUN(name, arglist, args) name(args)
#define _AND ,
/* from libc/time/local.h */
#define TZ_LOCK
#define TZ_UNLOCK
#define _tzname tzname
#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
#define YEAR_BASE 1900
#define SECSPERMIN 60L
#define MINSPERHOUR 60L
#define HOURSPERDAY 24L
#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
/*
* strftime.c
* Original Author: G. Haley
* Additions from: Eric Blake
*
* Places characters into the array pointed to by s as controlled by the string
* pointed to by format. If the total number of resulting characters including
* the terminating null character is not more than maxsize, returns the number
* of characters placed into the array pointed to by s (not including the
* terminating null character); otherwise zero is returned and the contents of
* the array indeterminate.
*/
/*
FUNCTION
<<strftime>>---flexible calendar time formatter
INDEX
strftime
ANSI_SYNOPSIS
#include <time.h>
size_t strftime(char *<[s]>, size_t <[maxsize]>,
const char *<[format]>, const struct tm *<[timp]>);
TRAD_SYNOPSIS
#include <time.h>
size_t strftime(<[s]>, <[maxsize]>, <[format]>, <[timp]>)
char *<[s]>;
size_t <[maxsize]>;
char *<[format]>;
struct tm *<[timp]>;
DESCRIPTION
<<strftime>> converts a <<struct tm>> representation of the time (at
<[timp]>) into a null-terminated string, starting at <[s]> and occupying
no more than <[maxsize]> characters.
You control the format of the output using the string at <[format]>.
<<*<[format]>>> can contain two kinds of specifications: text to be
copied literally into the formatted string, and time conversion
specifications. Time conversion specifications are two- and
three-character sequences beginning with `<<%>>' (use `<<%%>>' to
include a percent sign in the output). Each defined conversion
specification selects only the specified field(s) of calendar time
data from <<*<[timp]>>>, and converts it to a string in one of the
following ways:
o+
o %a
A three-letter abbreviation for the day of the week. [tm_wday]
o %A
The full name for the day of the week, one of `<<Sunday>>',
`<<Monday>>', `<<Tuesday>>', `<<Wednesday>>', `<<Thursday>>',
`<<Friday>>', or `<<Saturday>>'. [tm_wday]
o %b
A three-letter abbreviation for the month name. [tm_mon]
o %B
The full name of the month, one of `<<January>>', `<<February>>',
`<<March>>', `<<April>>', `<<May>>', `<<June>>', `<<July>>',
`<<August>>', `<<September>>', `<<October>>', `<<November>>',
`<<December>>'. [tm_mon]
o %c
A string representing the complete date and time, in the form
`<<"%a %b %e %H:%M:%S %Y">>' (example "Mon Apr 01 13:13:13
1992"). [tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year, tm_wday]
o %C
The century, that is, the year divided by 100 then truncated. For
4-digit years, the result is zero-padded and exactly two characters;
but for other years, there may a negative sign or more digits. In
this way, `<<%C%y>>' is equivalent to `<<%Y>>'. [tm_year]
o %d
The day of the month, formatted with two digits (from `<<01>>' to
`<<31>>'). [tm_mday]
o %D
A string representing the date, in the form `<<"%m/%d/%y">>'.
[tm_mday, tm_mon, tm_year]
o %e
The day of the month, formatted with leading space if single digit
(from `<<1>>' to `<<31>>'). [tm_mday]
o %E<<x>>
In some locales, the E modifier selects alternative representations of
certain modifiers <<x>>. But in the "C" locale supported by newlib,
it is ignored, and treated as %<<x>>.
o %F
A string representing the ISO 8601:2000 date format, in the form
`<<"%Y-%m-%d">>'. [tm_mday, tm_mon, tm_year]
o %g
The last two digits of the week-based year, see specifier %G (from
`<<00>>' to `<<99>>'). [tm_year, tm_wday, tm_yday]
o %G
The week-based year. In the ISO 8601:2000 calendar, week 1 of the year
includes January 4th, and begin on Mondays. Therefore, if January 1st,
2nd, or 3rd falls on a Sunday, that day and earlier belong to the last
week of the previous year; and if December 29th, 30th, or 31st falls
on Monday, that day and later belong to week 1 of the next year. For
consistency with %Y, it always has at least four characters.
Example: "%G" for Saturday 2nd January 1999 gives "1998", and for
Tuesday 30th December 1997 gives "1998". [tm_year, tm_wday, tm_yday]
o %h
A three-letter abbreviation for the month name (synonym for
"%b"). [tm_mon]
o %H
The hour (on a 24-hour clock), formatted with two digits (from
`<<00>>' to `<<23>>'). [tm_hour]
o %I
The hour (on a 12-hour clock), formatted with two digits (from
`<<01>>' to `<<12>>'). [tm_hour]
o %j
The count of days in the year, formatted with three digits
(from `<<001>>' to `<<366>>'). [tm_yday]
o %k
The hour (on a 24-hour clock), formatted with leading space if single
digit (from `<<0>>' to `<<23>>'). Non-POSIX extension. [tm_hour]
o %l
The hour (on a 12-hour clock), formatted with leading space if single
digit (from `<<1>>' to `<<12>>'). Non-POSIX extension. [tm_hour]
o %m
The month number, formatted with two digits (from `<<01>>' to `<<12>>').
[tm_mon]
o %M
The minute, formatted with two digits (from `<<00>>' to `<<59>>'). [tm_min]
o %n
A newline character (`<<\n>>').
o %O<<x>>
In some locales, the O modifier selects alternative digit characters
for certain modifiers <<x>>. But in the "C" locale supported by newlib, it
is ignored, and treated as %<<x>>.
o %p
Either `<<AM>>' or `<<PM>>' as appropriate. [tm_hour]
o %r
The 12-hour time, to the second. Equivalent to "%I:%M:%S %p". [tm_sec,
tm_min, tm_hour]
o %R
The 24-hour time, to the minute. Equivalent to "%H:%M". [tm_min, tm_hour]
o %S
The second, formatted with two digits (from `<<00>>' to `<<60>>'). The
value 60 accounts for the occasional leap second. [tm_sec]
o %t
A tab character (`<<\t>>').
o %T
The 24-hour time, to the second. Equivalent to "%H:%M:%S". [tm_sec,
tm_min, tm_hour]
o %u
The weekday as a number, 1-based from Monday (from `<<1>>' to
`<<7>>'). [tm_wday]
o %U
The week number, where weeks start on Sunday, week 1 contains the first
Sunday in a year, and earlier days are in week 0. Formatted with two
digits (from `<<00>>' to `<<53>>'). See also <<%W>>. [tm_wday, tm_yday]
o %V
The week number, where weeks start on Monday, week 1 contains January 4th,
and earlier days are in the previous year. Formatted with two digits
(from `<<01>>' to `<<53>>'). See also <<%G>>. [tm_year, tm_wday, tm_yday]
o %w
The weekday as a number, 0-based from Sunday (from `<<0>>' to `<<6>>').
[tm_wday]
o %W
The week number, where weeks start on Monday, week 1 contains the first
Monday in a year, and earlier days are in week 0. Formatted with two
digits (from `<<00>>' to `<<53>>'). [tm_wday, tm_yday]
o %x
A string representing the complete date, equivalent to "%m/%d/%y".
[tm_mon, tm_mday, tm_year]
o %X
A string representing the full time of day (hours, minutes, and
seconds), equivalent to "%H:%M:%S". [tm_sec, tm_min, tm_hour]
o %y
The last two digits of the year (from `<<00>>' to `<<99>>'). [tm_year]
o %Y
The full year, equivalent to <<%C%y>>. It will always have at least four
characters, but may have more. The year is accurate even when tm_year
added to the offset of 1900 overflows an int. [tm_year]
o %z
The offset from UTC. The format consists of a sign (negative is west of
Greewich), two characters for hour, then two characters for minutes
(-hhmm or +hhmm). If tm_isdst is negative, the offset is unknown and no
output is generated; if it is zero, the offset is the standard offset for
the current time zone; and if it is positive, the offset is the daylight
savings offset for the current timezone. The offset is determined from
the TZ environment variable, as if by calling tzset(). [tm_isdst]
o %Z
The time zone name. If tm_isdst is negative, no output is generated.
Otherwise, the time zone name is based on the TZ environment variable,
as if by calling tzset(). [tm_isdst]
o %%
A single character, `<<%>>'.
o-
RETURNS
When the formatted time takes up no more than <[maxsize]> characters,
the result is the length of the formatted string. Otherwise, if the
formatting operation was abandoned due to lack of room, the result is
<<0>>, and the string starting at <[s]> corresponds to just those
parts of <<*<[format]>>> that could be completely filled in within the
<[maxsize]> limit.
PORTABILITY
ANSI C requires <<strftime>>, but does not specify the contents of
<<*<[s]>>> when the formatted string would require more than
<[maxsize]> characters. Unrecognized specifiers and fields of
<<timp>> that are out of range cause undefined results. Since some
formats expand to 0 bytes, it is wise to set <<*<[s]>>> to a nonzero
value beforehand to distinguish between failure and an empty string.
This implementation does not support <<s>> being NULL, nor overlapping
<<s>> and <<format>>.
<<strftime>> requires no supporting OS subroutines.
*/
static _CONST int dname_len[7] =
{6, 6, 7, 9, 8, 6, 8};
static _CONST char *_CONST dname[7] =
{"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"};
static _CONST int mname_len[12] =
{7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8};
static _CONST char *_CONST mname[12] =
{"January", "February", "March", "April",
"May", "June", "July", "August", "September", "October", "November",
"December"};
/* Using the tm_year, tm_wday, and tm_yday components of TIM_P, return
-1, 0, or 1 as the adjustment to add to the year for the ISO week
numbering used in "%g%G%V", avoiding overflow. */
static int
_DEFUN (iso_year_adjust, (tim_p),
_CONST struct tm *tim_p)
{
/* Account for fact that tm_year==0 is year 1900. */
int leap = isleap (tim_p->tm_year + (YEAR_BASE
- (tim_p->tm_year < 0 ? 0 : 2000)));
/* Pack the yday, wday, and leap year into a single int since there are so
many disparate cases. */
#define PACK(yd, wd, lp) (((yd) << 4) + (wd << 1) + (lp))
switch (PACK (tim_p->tm_yday, tim_p->tm_wday, leap))
{
case PACK (0, 5, 0): /* Jan 1 is Fri, not leap. */
case PACK (0, 6, 0): /* Jan 1 is Sat, not leap. */
case PACK (0, 0, 0): /* Jan 1 is Sun, not leap. */
case PACK (0, 5, 1): /* Jan 1 is Fri, leap year. */
case PACK (0, 6, 1): /* Jan 1 is Sat, leap year. */
case PACK (0, 0, 1): /* Jan 1 is Sun, leap year. */
case PACK (1, 6, 0): /* Jan 2 is Sat, not leap. */
case PACK (1, 0, 0): /* Jan 2 is Sun, not leap. */
case PACK (1, 6, 1): /* Jan 2 is Sat, leap year. */
case PACK (1, 0, 1): /* Jan 2 is Sun, leap year. */
case PACK (2, 0, 0): /* Jan 3 is Sun, not leap. */
case PACK (2, 0, 1): /* Jan 3 is Sun, leap year. */
return -1; /* Belongs to last week of previous year. */
case PACK (362, 1, 0): /* Dec 29 is Mon, not leap. */
case PACK (363, 1, 1): /* Dec 29 is Mon, leap year. */
case PACK (363, 1, 0): /* Dec 30 is Mon, not leap. */
case PACK (363, 2, 0): /* Dec 30 is Tue, not leap. */
case PACK (364, 1, 1): /* Dec 30 is Mon, leap year. */
case PACK (364, 2, 1): /* Dec 30 is Tue, leap year. */
case PACK (364, 1, 0): /* Dec 31 is Mon, not leap. */
case PACK (364, 2, 0): /* Dec 31 is Tue, not leap. */
case PACK (364, 3, 0): /* Dec 31 is Wed, not leap. */
case PACK (365, 1, 1): /* Dec 31 is Mon, leap year. */
case PACK (365, 2, 1): /* Dec 31 is Tue, leap year. */
case PACK (365, 3, 1): /* Dec 31 is Wed, leap year. */
return 1; /* Belongs to first week of next year. */
}
return 0; /* Belongs to specified year. */
#undef PACK
}
size_t
_DEFUN (strftime, (s, maxsize, format, tim_p),
char *s _AND
size_t maxsize _AND
_CONST char *format _AND
_CONST struct tm *tim_p)
{
size_t count = 0;
int i;
for (;;)
{
while (*format && *format != '%')
{
if (count < maxsize - 1)
s[count++] = *format++;
else
return 0;
}
if (*format == '\0')
break;
format++;
if (*format == 'E' || *format == 'O')
format++;
switch (*format)
{
case 'a':
for (i = 0; i < 3; i++)
{
if (count < maxsize - 1)
s[count++] =
dname[tim_p->tm_wday][i];
else
return 0;
}
break;
case 'A':
for (i = 0; i < dname_len[tim_p->tm_wday]; i++)
{
if (count < maxsize - 1)
s[count++] =
dname[tim_p->tm_wday][i];
else
return 0;
}
break;
case 'b':
case 'h':
for (i = 0; i < 3; i++)
{
if (count < maxsize - 1)
s[count++] =
mname[tim_p->tm_mon][i];
else
return 0;
}
break;
case 'B':
for (i = 0; i < mname_len[tim_p->tm_mon]; i++)
{
if (count < maxsize - 1)
s[count++] =
mname[tim_p->tm_mon][i];
else
return 0;
}
break;
case 'c':
{
/* Length is not known because of %C%y, so recurse. */
size_t adjust = strftime (&s[count], maxsize - count,
"%a %b %e %H:%M:%S %C%y", tim_p);
if (adjust > 0)
count += adjust;
else
return 0;
}
break;
case 'C':
{
/* Examples of (tm_year + YEAR_BASE) that show how %Y == %C%y
with 32-bit int.
%Y %C %y
2147485547 21474855 47
10000 100 00
9999 99 99
0999 09 99
0099 00 99
0001 00 01
0000 00 00
-001 -0 01
-099 -0 99
-999 -9 99
-1000 -10 00
-10000 -100 00
-2147481748 -21474817 48
Be careful of both overflow and sign adjustment due to the
asymmetric range of years.
*/
int neg = tim_p->tm_year < -YEAR_BASE;
int century = tim_p->tm_year >= 0
? tim_p->tm_year / 100 + YEAR_BASE / 100
: abs (tim_p->tm_year + YEAR_BASE) / 100;
count += snprintf (&s[count], maxsize - count, "%s%.*d",
neg ? "-" : "", 2 - neg, century);
if (count >= maxsize)
return 0;
}
break;
case 'd':
case 'e':
if (count < maxsize - 2)
{
sprintf (&s[count], *format == 'd' ? "%.2d" : "%2d",
tim_p->tm_mday);
count += 2;
}
else
return 0;
break;
case 'D':
case 'x':
/* %m/%d/%y */
if (count < maxsize - 8)
{
sprintf (&s[count], "%.2d/%.2d/%.2d",
tim_p->tm_mon + 1, tim_p->tm_mday,
tim_p->tm_year >= 0 ? tim_p->tm_year % 100
: abs (tim_p->tm_year + YEAR_BASE) % 100);
count += 8;
}
else
return 0;
break;
case 'F':
{
/* Length is not known because of %C%y, so recurse. */
size_t adjust = strftime (&s[count], maxsize - count,
"%C%y-%m-%d", tim_p);
if (adjust > 0)
count += adjust;
else
return 0;
}
break;
case 'g':
if (count < maxsize - 2)
{
/* Be careful of both overflow and negative years, thanks to
the asymmetric range of years. */
int adjust = iso_year_adjust (tim_p);
int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
: abs (tim_p->tm_year + YEAR_BASE) % 100;
if (adjust < 0 && tim_p->tm_year <= -YEAR_BASE)
adjust = 1;
else if (adjust > 0 && tim_p->tm_year < -YEAR_BASE)
adjust = -1;
sprintf (&s[count], "%.2d",
((year + adjust) % 100 + 100) % 100);
count += 2;
}
else
return 0;
break;
case 'G':
{
/* See the comments for 'C' and 'Y'; this is a variable length
field. Although there is no requirement for a minimum number
of digits, we use 4 for consistency with 'Y'. */
int neg = tim_p->tm_year < -YEAR_BASE;
int adjust = iso_year_adjust (tim_p);
int century = tim_p->tm_year >= 0
? tim_p->tm_year / 100 + YEAR_BASE / 100
: abs (tim_p->tm_year + YEAR_BASE) / 100;
int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
: abs (tim_p->tm_year + YEAR_BASE) % 100;
if (adjust < 0 && tim_p->tm_year <= -YEAR_BASE)
neg = adjust = 1;
else if (adjust > 0 && neg)
adjust = -1;
year += adjust;
if (year == -1)
{
year = 99;
--century;
}
else if (year == 100)
{
year = 0;
++century;
}
count += snprintf (&s[count], maxsize - count, "%s%.*d%.2d",
neg ? "-" : "", 2 - neg, century, year);
if (count >= maxsize)
return 0;
}
break;
case 'H':
case 'k':
if (count < maxsize - 2)
{
sprintf (&s[count], *format == 'k' ? "%2d" : "%.2d",
tim_p->tm_hour);
count += 2;
}
else
return 0;
break;
case 'I':
case 'l':
if (count < maxsize - 2)
{
if (tim_p->tm_hour == 0 ||
tim_p->tm_hour == 12)
{
s[count++] = '1';
s[count++] = '2';
}
else
{
sprintf (&s[count], *format == 'I' ? "%.2d" : "%2d",
tim_p->tm_hour % 12);
count += 2;
}
}
else
return 0;
break;
case 'j':
if (count < maxsize - 3)
{
sprintf (&s[count], "%.3d",
tim_p->tm_yday + 1);
count += 3;
}
else
return 0;
break;
case 'm':
if (count < maxsize - 2)
{
sprintf (&s[count], "%.2d",
tim_p->tm_mon + 1);
count += 2;
}
else
return 0;
break;
case 'M':
if (count < maxsize - 2)
{
sprintf (&s[count], "%.2d",
tim_p->tm_min);
count += 2;
}
else
return 0;
break;
case 'n':
if (count < maxsize - 1)
s[count++] = '\n';
else
return 0;
break;
case 'p':
if (count < maxsize - 2)
{
if (tim_p->tm_hour < 12)
s[count++] = 'A';
else
s[count++] = 'P';
s[count++] = 'M';
}
else
return 0;
break;
case 'r':
if (count < maxsize - 11)
{
if (tim_p->tm_hour == 0 ||
tim_p->tm_hour == 12)
{
s[count++] = '1';
s[count++] = '2';
}
else
{
sprintf (&s[count], "%.2d", tim_p->tm_hour % 12);
count += 2;
}
s[count++] = ':';
sprintf (&s[count], "%.2d",
tim_p->tm_min);
count += 2;
s[count++] = ':';
sprintf (&s[count], "%.2d",
tim_p->tm_sec);
count += 2;
s[count++] = ' ';
if (tim_p->tm_hour < 12)
s[count++] = 'A';
else
s[count++] = 'P';
s[count++] = 'M';
}
else
return 0;
break;
case 'R':
if (count < maxsize - 5)
{
sprintf (&s[count], "%.2d:%.2d", tim_p->tm_hour, tim_p->tm_min);
count += 5;
}
else
return 0;
break;
case 'S':
if (count < maxsize - 2)
{
sprintf (&s[count], "%.2d",
tim_p->tm_sec);
count += 2;
}
else
return 0;
break;
case 't':
if (count < maxsize - 1)
s[count++] = '\t';
else
return 0;
break;
case 'T':
case 'X':
if (count < maxsize - 8)
{
sprintf (&s[count], "%.2d:%.2d:%.2d", tim_p->tm_hour,
tim_p->tm_min, tim_p->tm_sec);
count += 8;
}
else
return 0;
break;
case 'u':
if (count < maxsize - 1)
{
if (tim_p->tm_wday == 0)
s[count++] = '7';
else
s[count++] = '0' + tim_p->tm_wday;
}
else
return 0;
break;
case 'U':
if (count < maxsize - 2)
{
sprintf (&s[count], "%.2d",
(tim_p->tm_yday + 7 -
tim_p->tm_wday) / 7);
count += 2;
}
else
return 0;
break;
case 'V':
if (count < maxsize - 2)
{
int adjust = iso_year_adjust (tim_p);
int wday = (tim_p->tm_wday) ? tim_p->tm_wday - 1 : 6;
int week = (tim_p->tm_yday + 10 - wday) / 7;
if (adjust > 0)
week = 1;
else if (adjust < 0)
/* Previous year has 53 weeks if current year starts on
Fri, and also if current year starts on Sat and
previous year was leap year. */
week = 52 + (4 >= (wday - tim_p->tm_yday
- isleap (tim_p->tm_year
+ (YEAR_BASE - 1
- (tim_p->tm_year < 0
? 0 : 2000)))));
sprintf (&s[count], "%.2d", week);
count += 2;
}
else
return 0;
break;
case 'w':
if (count < maxsize - 1)
s[count++] = '0' + tim_p->tm_wday;
else
return 0;
break;
case 'W':
if (count < maxsize - 2)
{
int wday = (tim_p->tm_wday) ? tim_p->tm_wday - 1 : 6;
sprintf (&s[count], "%.2d",
(tim_p->tm_yday + 7 - wday) / 7);
count += 2;
}
else
return 0;
break;
case 'y':
if (count < maxsize - 2)
{
/* Be careful of both overflow and negative years, thanks to
the asymmetric range of years. */
int year = tim_p->tm_year >= 0 ? tim_p->tm_year % 100
: abs (tim_p->tm_year + YEAR_BASE) % 100;
sprintf (&s[count], "%.2d", year);
count += 2;
}
else
return 0;
break;
case 'Y':
{
/* Length is not known because of %C%y, so recurse. */
size_t adjust = strftime (&s[count], maxsize - count,
"%C%y", tim_p);
if (adjust > 0)
count += adjust;
else
return 0;
}
break;
case 'z':
#ifndef _WIN32_WCE
if (tim_p->tm_isdst >= 0)
{
if (count < maxsize - 5)
{
long offset;
__tzinfo_type *tz = __gettzinfo ();
TZ_LOCK;
/* The sign of this is exactly opposite the envvar TZ. We
could directly use the global _timezone for tm_isdst==0,
but have to use __tzrule for daylight savings. */
offset = -tz->__tzrule[tim_p->tm_isdst > 0].offset;
TZ_UNLOCK;
sprintf (&s[count], "%+03ld%.2ld", offset / SECSPERHOUR,
labs (offset / SECSPERMIN) % 60L);
count += 5;
}
else
return 0;
}
break;
#endif
case 'Z':
if (tim_p->tm_isdst >= 0)
{
int size;
TZ_LOCK;
size = strlen(_tzname[tim_p->tm_isdst > 0]);
for (i = 0; i < size; i++)
{
if (count < maxsize - 1)
s[count++] = _tzname[tim_p->tm_isdst > 0][i];
else
{
TZ_UNLOCK;
return 0;
}
}
TZ_UNLOCK;
}
break;
case '%':
if (count < maxsize - 1)
s[count++] = '%';
else
return 0;
break;
}
if (*format)
format++;
else
break;
}
if (maxsize)
s[count] = '\0';
return count;
}
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