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tdegraphics/kviewshell/plugins/djvu/libdjvu/GOS.cpp

372 lines
9.5 KiB

//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: GOS.cpp,v 1.12 2005/04/27 16:34:13 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include "GException.h"
#include "GThreads.h"
#include "GOS.h"
#include "GURL.h"
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <string.h>
#ifdef WIN32
# include <atlbase.h>
# include <windows.h>
# include <direct.h>
#endif
#ifdef OS2
# define INCL_DOS
# include <os2.h>
#endif
#if defined(UNIX) || defined(OS2)
# include <errno.h>
# include <sys/types.h>
# include <sys/stat.h>
# include <sys/time.h>
# include <fcntl.h>
# include <pwd.h>
# include <stdio.h>
# include <unistd.h>
#endif
#ifdef macintosh
# include <unix.h>
# include <errno.h>
# include <unistd.h>
#endif
// -- TRUE FALSE
#undef TRUE
#undef FALSE
#define TRUE 1
#define FALSE 0
// -- MAXPATHLEN
#ifndef MAXPATHLEN
# ifdef _MAX_PATH
# define MAXPATHLEN _MAX_PATH
# else
# define MAXPATHLEN 1024
# endif
#else
# if ( MAXPATHLEN < 1024 )
# undef MAXPATHLEN
# define MAXPATHLEN 1024
# endif
#endif
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
#if defined(AUTOCONF) && !defined(HAVE_STRERROR)
# define NEED_STRERROR
#elif defined(sun) && !defined(__svr4__)
# define NEED_STRERROR
#elif defined(REIMPLEMENT_STRERROR)
# define NEED_STRERROR
#endif
#ifdef NEED_STRERROR
char *
strerror(int errno)
{
extern int sys_nerr;
extern char *sys_errlist[];
if (errno>0 && errno<sys_nerr)
return sys_errlist[errno];
return "unknown stdio error";
}
#endif
static const char slash='/';
static const char percent='%';
static const char backslash='\\';
static const char colon=':';
static const char dot='.';
static const char nillchar=0;
// -----------------------------------------
// Functions for dealing with filenames
// -----------------------------------------
static inline int
finddirsep(const GUTF8String &fname)
{
#if defined(UNIX)
return fname.rsearch('/',0);
#elif defined(WIN32) || defined(OS2)
return fname.rcontains("\\/",0);
#elif defined(macintosh)
return fname.rcontains(":/",0);
#else
#error "Define something here for your operating system"
#endif
}
// basename(filename[, suffix])
// -- returns the last component of filename and removes suffix
// when present. works like /bin/basename.
GUTF8String
GOS::basename(const GUTF8String &gfname, const char *suffix)
{
if(!gfname.length())
return gfname;
const char *fname=gfname;
#if defined(WIN32) || defined(OS2)
// Special cases
if (fname[1] == colon)
{
if(!fname[2])
{
return gfname;
}
if (!fname[3] && (fname[2]== slash || fname[2]== backslash))
{
char string_buffer[4];
string_buffer[0] = fname[0];
string_buffer[1] = colon;
string_buffer[2] = backslash;
string_buffer[3] = 0;
return string_buffer;
}
}
#endif
// Allocate buffer
GUTF8String retval(gfname,finddirsep(gfname)+1,(unsigned int)(-1));
fname=retval;
// Process suffix
if (suffix)
{
if (suffix[0]== dot )
suffix ++;
if (suffix[0])
{
const GUTF8String gsuffix(suffix);
const int sl = gsuffix.length();
const char *s = fname + strlen(fname);
if (s > fname + sl)
{
s = s - (sl + 1);
if(*s == dot && (GUTF8String(s+1).downcase() == gsuffix.downcase()))
{
retval.setat((int)((size_t)s-(size_t)fname),0);
}
}
}
}
return retval;
}
// errmsg --
// -- A small helper function returning a
// stdio error message in a static buffer.
static GNativeString
errmsg()
{
GNativeString buffer;
const char *errname = strerror(errno);
buffer.format("%s (errno = %d)", errname, errno);
return buffer;
}
// -----------------------------------------
// Functions for measuring time
// -----------------------------------------
// ticks() --
// -- returns the number of milliseconds elapsed since
// a system dependent date.
unsigned long
GOS::ticks()
{
#if defined(UNIX)
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0)
G_THROW(errmsg());
return (unsigned long)( ((tv.tv_sec & 0xfffff)*1000)
+ (tv.tv_usec/1000) );
#elif defined(WIN32)
DWORD clk = GetTickCount();
return (unsigned long)clk;
#elif defined(OS2)
ULONG clk = 0;
DosQuerySysInfo(TQSV_MS_COUNT, TQSV_MS_COUNT, (PVOID)&clk, sizeof(ULONG));
return clk;
#elif defined(macintosh)
return (unsigned long)((double)TickCount()*16.66);
#else
# error "Define something here for your operating system"
#endif
}
// sleep(int milliseconds) --
// -- sleeps during the specified time (in milliseconds)
void
GOS::sleep(int milliseconds)
{
#if defined(UNIX)
struct timeval tv;
tv.tv_sec = milliseconds / 1000;
tv.tv_usec = (milliseconds - (tv.tv_sec * 1000)) * 1000;
# if defined(THREADMODEL) && (THREADMODEL==COTHREADS)
GThread::select(0, NULL, NULL, NULL, &tv);
# else
select(0, NULL, NULL, NULL, &tv);
# endif
#elif defined(WIN32)
Sleep(milliseconds);
#elif defined(OS2)
DosSleep(milliseconds);
#elif defined(macintosh)
unsigned long tick = ticks(), now;
while (1) {
now = ticks();
if ((tick+milliseconds) < now)
break;
GThread::yield();
}
#endif
}
// -----------------------------------------
// Testing
// -----------------------------------------
// cwd([dirname])
// -- changes directory to dirname (when specified).
// returns the full path name of the current directory.
GUTF8String
GOS::cwd(const GUTF8String &dirname)
{
#if defined(UNIX) || defined(macintosh) || defined(OS2)
if (dirname.length() && chdir(dirname.getUTF82Native())==-1)//MBCS cvt
G_THROW(errmsg());
char *string_buffer;
GPBuffer<char> gstring_buffer(string_buffer,MAXPATHLEN+1);
char *result = getcwd(string_buffer,MAXPATHLEN);
if (!result)
G_THROW(errmsg());
return GNativeString(result).getNative2UTF8();//MBCS cvt
#elif defined (WIN32)
char drv[2];
if (dirname.length() && _chdir(dirname.getUTF82Native())==-1)//MBCS cvt
G_THROW(errmsg());
drv[0]= dot ; drv[1]=0;
char *string_buffer;
GPBuffer<char> gstring_buffer(string_buffer,MAXPATHLEN+1);
char *result = getcwd(string_buffer,MAXPATHLEN);
GetFullPathName(drv, MAXPATHLEN, string_buffer, &result);
return GNativeString(string_buffer).getNative2UTF8();//MBCS cvt
#else
#error "Define something here for your operating system"
#endif
}
GUTF8String
GOS::getenv(const GUTF8String &name)
{
GUTF8String retval;
if(name.length())
{
const char *env=::getenv(name.getUTF82Native());
if(env)
{
retval=GNativeString(env);
}
}
return retval;
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif