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Merge branch 'next' of git://gitorious.org/fg/simgear into next

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This commit is contained in:
Erik Hofman
2010-07-23 13:57:53 +02:00
parent 0e92bb58b0 bbd61977f1
commit 792ffa2d26
11 changed files with 694 additions and 79 deletions
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8
projects/VC90/SimGear.vcproj
View File

@@ -495,6 +495,14 @@
RelativePath="..\..\simgear\io\sg_socket_udp.hxx"
>
</File>
<File
RelativePath="..\..\simgear\io\raw_socket.cxx"
>
</File>
<File
RelativePath="..\..\simgear\io\raw_socket.hxx"
>
</File>
</Filter>
<Filter
Name="Lib_sgmagvar"

34
simgear/io/Makefile.am
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@@ -9,7 +9,8 @@ include_HEADERS = \
sg_file.hxx \
sg_serial.hxx \
sg_socket.hxx \
sg_socket_udp.hxx
sg_socket_udp.hxx \
raw_socket.hxx
libsgio_a_SOURCES = \
iochannel.cxx \
@@ -18,7 +19,8 @@ libsgio_a_SOURCES = \
sg_file.cxx \
sg_serial.cxx \
sg_socket.cxx \
sg_socket_udp.cxx
sg_socket_udp.cxx \
raw_socket.cxx
INCLUDES = -I$(top_srcdir)
@@ -26,52 +28,37 @@ noinst_PROGRAMS = decode_binobj socktest lowtest tcp_server tcp_client
tcp_server_SOURCES = tcp_server.cxx
if HAVE_FRAMEWORK_PLIB
tcp_server_LDFLAGS = $(plib_FRAMEWORK)
else
tcp_server_PLIB_LIBS = -lplibnet -lplibul
endif
tcp_server_LDADD = \
libsgio.a \
$(top_builddir)/simgear/structure/libsgstructure.a \
$(top_builddir)/simgear/debug/libsgdebug.a \
$(top_builddir)/simgear/bucket/libsgbucket.a \
$(top_builddir)/simgear/misc/libsgmisc.a \
$(tcp_server_PLIB_LIBS) -lz \
-lz \
$(network_LIBS) \
$(base_LIBS)
tcp_client_SOURCES = tcp_client.cxx
if HAVE_FRAMEWORK_PLIB
tcp_client_LDFLAGS = $(plib_FRAMEWORK)
else
tcp_client_PLIB_LIBS = -lplibnet -lplibul
endif
tcp_client_LDADD = \
libsgio.a \
$(top_builddir)/simgear/structure/libsgstructure.a \
$(top_builddir)/simgear/debug/libsgdebug.a \
$(top_builddir)/simgear/bucket/libsgbucket.a \
$(top_builddir)/simgear/misc/libsgmisc.a \
$(tcp_client_PLIB_LIBS) -lz \
-lz \
$(network_LIBS) \
$(base_LIBS)
socktest_SOURCES = socktest.cxx
if HAVE_FRAMEWORK_PLIB
socktest_LDFLAGS = $(plib_FRAMEWORK)
else
socktest_PLIB_LIBS = -lplibnet -lplibul
endif
socktest_LDADD = \
libsgio.a \
$(top_builddir)/simgear/structure/libsgstructure.a \
$(top_builddir)/simgear/debug/libsgdebug.a \
$(top_builddir)/simgear/bucket/libsgbucket.a \
$(top_builddir)/simgear/misc/libsgmisc.a \
$(socktest_PLIB_LIBS) -lz \
-lz \
$(network_LIBS) \
$(base_LIBS)
@@ -79,6 +66,7 @@ lowtest_SOURCES = lowtest.cxx
lowtest_LDADD = \
libsgio.a \
$(top_builddir)/simgear/structure/libsgstructure.a \
$(top_builddir)/simgear/debug/libsgdebug.a \
$(top_builddir)/simgear/bucket/libsgbucket.a \
$(top_builddir)/simgear/misc/libsgmisc.a \

487
simgear/io/raw_socket.cxx Normal file
View File

@@ -0,0 +1,487 @@
/*
simgear::Socket, adapted from PLIB Socket by James Turner
Copyright (C) 2010 James Turner
PLIB - A Suite of Portable Game Libraries
Copyright (C) 1998,2002 Steve Baker
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <simgear_config.h>
#endif
#include <simgear/compiler.h>
#include "sg_socket.hxx"
#if defined(_WIN32) && !defined(__CYGWIN__)
# define WINSOCK // use winsock convetions, otherwise standard POSIX
#endif
#include <cstdlib>
#include <ctime>
#include <cstring>
#include <cassert>
#include <cstdio> // for snprintf
#if defined(WINSOCK)
# include <winsock.h>
# include <stdarg.h>
#else
# include <sys/types.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
# include <sys/time.h>
# include <unistd.h>
# include <netdb.h>
# include <fcntl.h>
#endif
#if defined(_MSC_VER) && !defined(socklen_t)
#define socklen_t int
#endif
#include <simgear/debug/logstream.hxx>
#include <simgear/structure/exception.hxx>
namespace simgear
{
IPAddress::IPAddress ( const char* host, int port )
{
set ( host, port ) ;
}
void IPAddress::set ( const char* host, int port )
{
memset(this, 0, sizeof(IPAddress));
sin_family = AF_INET ;
sin_port = htons (port);
/* Convert a string specifying a host name or one of a few symbolic
** names to a numeric IP address. This usually calls gethostbyname()
** to do the work; the names "" and "<broadcast>" are special.
*/
if (!host || host[0] == '\0') {
sin_addr = INADDR_ANY;
return;
}
if (strcmp(host, "<broadcast>") == 0) {
sin_addr = INADDR_BROADCAST;
return;
}
sin_addr = inet_addr ( host ) ;
if (sin_addr != INADDR_NONE) {
return;
}
// finally, try gethostbyname
struct hostent *hp = gethostbyname ( host ) ;
if (!hp) {
SG_LOG(SG_IO, SG_WARN, "gethostbyname failed for " << host);
sin_addr = INADDR_ANY ;
return;
}
memcpy ( (char *) &sin_addr, hp->h_addr, hp->h_length ) ;
}
/* Create a string object representing an IP address.
This is always a string of the form 'dd.dd.dd.dd' (with variable
size numbers). */
const char* IPAddress::getHost () const
{
#if 0
const char* buf = inet_ntoa ( sin_addr ) ;
#else
static char buf [32];
long x = ntohl(sin_addr);
sprintf(buf, "%d.%d.%d.%d",
(int) (x>>24) & 0xff, (int) (x>>16) & 0xff,
(int) (x>> 8) & 0xff, (int) (x>> 0) & 0xff );
#endif
return buf;
}
unsigned int IPAddress::getIP () const
{
return sin_addr;
}
unsigned int IPAddress::getPort() const
{
return ntohs(sin_port);
}
unsigned int IPAddress::getFamily () const
{
return sin_family;
}
const char* IPAddress::getLocalHost ()
{
//gethostbyname(gethostname())
char buf[256];
memset(buf, 0, sizeof(buf));
gethostname(buf, sizeof(buf)-1);
const hostent *hp = gethostbyname(buf);
if (hp && *hp->h_addr_list)
{
in_addr addr = *((in_addr*)*hp->h_addr_list);
const char* host = inet_ntoa(addr);
if ( host )
return host ;
}
return "127.0.0.1" ;
}
bool IPAddress::getBroadcast () const
{
return sin_addr == INADDR_BROADCAST;
}
Socket::Socket ()
{
handle = -1 ;
}
Socket::~Socket ()
{
close () ;
}
void Socket::setHandle (int _handle)
{
close () ;
handle = _handle ;
}
bool Socket::open ( bool stream )
{
close () ;
handle = ::socket ( AF_INET, (stream? SOCK_STREAM: SOCK_DGRAM), 0 ) ;
return (handle != -1);
}
void Socket::setBlocking ( bool blocking )
{
assert ( handle != -1 ) ;
#if defined(WINSOCK)
u_long nblocking = blocking? 0: 1;
::ioctlsocket(handle, FIONBIO, &nblocking);
#else
int delay_flag = ::fcntl (handle, F_GETFL, 0);
if (blocking)
delay_flag &= (~O_NDELAY);
else
delay_flag |= O_NDELAY;
::fcntl (handle, F_SETFL, delay_flag);
#endif
}
void Socket::setBroadcast ( bool broadcast )
{
assert ( handle != -1 ) ;
int result;
if ( broadcast ) {
int one = 1;
#if defined(_WIN32) || defined(__CYGWIN__)
result = ::setsockopt( handle, SOL_SOCKET, SO_BROADCAST, (char*)&one, sizeof(one) );
#else
result = ::setsockopt( handle, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one) );
#endif
} else {
result = ::setsockopt( handle, SOL_SOCKET, SO_BROADCAST, NULL, 0 );
}
if ( result < 0 ) {
throw sg_exception("Socket::setBroadcast failed");
}
}
int Socket::bind ( const char* host, int port )
{
assert ( handle != -1 ) ;
IPAddress addr ( host, port ) ;
return ::bind(handle,(const sockaddr*)&addr,sizeof(IPAddress));
}
int Socket::listen ( int backlog )
{
assert ( handle != -1 ) ;
return ::listen(handle,backlog);
}
int Socket::accept ( IPAddress* addr )
{
assert ( handle != -1 ) ;
if ( addr == NULL )
{
return ::accept(handle,NULL,NULL);
}
else
{
socklen_t addr_len = (socklen_t) sizeof(IPAddress) ;
return ::accept(handle,(sockaddr*)addr,&addr_len);
}
}
int Socket::connect ( const char* host, int port )
{
assert ( handle != -1 ) ;
IPAddress addr ( host, port ) ;
if ( addr.getBroadcast() ) {
setBroadcast( true );
}
return ::connect(handle,(const sockaddr*)&addr,sizeof(IPAddress));
}
int Socket::send (const void * buffer, int size, int flags)
{
assert ( handle != -1 ) ;
return ::send (handle, (const char*)buffer, size, flags);
}
int Socket::sendto ( const void * buffer, int size,
int flags, const IPAddress* to )
{
assert ( handle != -1 ) ;
return ::sendto(handle,(const char*)buffer,size,flags,
(const sockaddr*)to,sizeof(IPAddress));
}
int Socket::recv (void * buffer, int size, int flags)
{
assert ( handle != -1 ) ;
return ::recv (handle, (char*)buffer, size, flags);
}
int Socket::recvfrom ( void * buffer, int size,
int flags, IPAddress* from )
{
assert ( handle != -1 ) ;
socklen_t fromlen = (socklen_t) sizeof(IPAddress) ;
return ::recvfrom(handle,(char*)buffer,size,flags,(sockaddr*)from,&fromlen);
}
void Socket::close (void)
{
if ( handle != -1 )
{
#if defined(WINSOCK)
::closesocket( handle );
#else
::close( handle );
#endif
handle = -1 ;
}
}
bool Socket::isNonBlockingError ()
{
#if defined(WINSOCK)
int wsa_errno = WSAGetLastError();
if ( wsa_errno != 0 )
{
WSASetLastError(0);
SG_LOG(SG_IO, SG_WARN, "isNonBlockingError: WSAGetLastError():" << wsa_errno);
switch (wsa_errno) {
case WSAEWOULDBLOCK: // always == NET_EAGAIN?
case WSAEALREADY:
case WSAEINPROGRESS:
return true;
}
}
return false;
#else
switch (errno) {
case EWOULDBLOCK: // always == NET_EAGAIN?
case EALREADY:
case EINPROGRESS:
return true;
}
return false;
#endif
}
//////////////////////////////////////////////////////////////////////
//
// modified version by os
//
//////////////////////////////////////////////////////////////////////
int Socket::select ( Socket** reads, Socket** writes, int timeout )
{
fd_set r,w;
int retval;
FD_ZERO (&r);
FD_ZERO (&w);
int i, k ;
int num = 0 ;
if ( reads )
{
for ( i=0; reads[i]; i++ )
{
int fd = reads[i]->getHandle();
FD_SET (fd, &r);
num++;
}
}
if ( writes )
{
for ( i=0; writes[i]; i++ )
{
int fd = writes[i]->getHandle();
FD_SET (fd, &w);
num++;
}
}
if (!num)
return num ;
/* Set up the timeout */
struct timeval tv ;
tv.tv_sec = timeout/1000;
tv.tv_usec = (timeout%1000)*1000;
// It bothers me that select()'s first argument does not appear to
// work as advertised... [it hangs like this if called with
// anything less than FD_SETSIZE, which seems wasteful?]
// Note: we ignore the 'exception' fd_set - I have never had a
// need to use it. The name is somewhat misleading - the only
// thing I have ever seen it used for is to detect urgent data -
// which is an unportable feature anyway.
retval = ::select (FD_SETSIZE, &r, &w, 0, &tv);
//remove sockets that had no activity
num = 0 ;
if ( reads )
{
for ( k=i=0; reads[i]; i++ )
{
int fd = reads[i]->getHandle();
if ( FD_ISSET (fd, &r) )
{
reads[k++] = reads[i];
num++;
}
}
reads[k] = NULL ;
}
if ( writes )
{
for ( k=i=0; writes[i]; i++ )
{
int fd = writes[i]->getHandle();
if ( FD_ISSET (fd, &w) )
{
writes[k++] = writes[i];
num++;
}
}
writes[k] = NULL ;
}
if (retval == 0) // timeout
return (-2);
if (retval == -1)// error
return (-1);
return num ;
}
/* Init/Exit functions */
static void netExit ( void )
{
#if defined(WINSOCK)
/* Clean up windows networking */
if ( WSACleanup() == SOCKET_ERROR ) {
if ( WSAGetLastError() == WSAEINPROGRESS ) {
WSACancelBlockingCall();
WSACleanup();
}
}
#endif
}
int Socket::initSockets()
{
assert ( sizeof(sockaddr_in) == sizeof(IPAddress) ) ;
#if defined(WINSOCK)
/* Start up the windows networking */
WORD version_wanted = MAKEWORD(1,1);
WSADATA wsaData;
if ( WSAStartup(version_wanted, &wsaData) != 0 ) {
throw sg_exception("WinSock initialization failed");
}
#endif
atexit( netExit ) ;
return(0);
}
} // of namespace simgear

110
simgear/io/raw_socket.hxx Normal file
View File

@@ -0,0 +1,110 @@
/*
simgear::Socket, adapted from PLIB netSocket by James Turner
Copyright (C) 2010 James Turner
PLIB - A Suite of Portable Game Libraries
Copyright (C) 1998,2002 Steve Baker
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef SG_IO_SOCKET_HXX
#define SG_IO_SOCKET_HXX
#include <errno.h>
#if defined(__APPLE__)
# include <netinet/in.h>
#endif
namespace simgear
{
/*
* Socket address, internet style.
*/
class IPAddress
{
/* DANGER!!! This MUST match 'struct sockaddr_in' exactly! */
#ifdef __APPLE__
__uint8_t sin_len;
__uint8_t sin_family;
in_port_t sin_port;
in_addr_t sin_addr;
char sin_zero[8];
#else
short sin_family ;
unsigned short sin_port ;
unsigned int sin_addr ;
char sin_zero [ 8 ] ;
#endif
public:
IPAddress () {}
IPAddress ( const char* host, int port ) ;
void set ( const char* host, int port ) ;
const char* getHost () const ;
unsigned int getPort() const ;
unsigned int getIP () const ;
unsigned int getFamily () const ;
static const char* getLocalHost () ;
bool getBroadcast () const ;
};
/*
* Socket type
*/
class Socket
{
int handle ;
public:
Socket () ;
virtual ~Socket () ;
static int initSockets();
int getHandle () const { return handle; }
void setHandle (int handle) ;
bool open ( bool stream=true ) ;
void close ( void ) ;
int bind ( const char* host, int port ) ;
int listen ( int backlog ) ;
int accept ( IPAddress* addr ) ;
int connect ( const char* host, int port ) ;
int send ( const void * buffer, int size, int flags = 0 ) ;
int sendto ( const void * buffer, int size, int flags, const IPAddress* to ) ;
int recv ( void * buffer, int size, int flags = 0 ) ;
int recvfrom ( void * buffer, int size, int flags, IPAddress* from ) ;
void setBlocking ( bool blocking ) ;
void setBroadcast ( bool broadcast ) ;
static bool isNonBlockingError () ;
static int select ( Socket** reads, Socket** writes, int timeout ) ;
} ;
//const char* netFormat ( const char* fmt, ... ) ;
} // of namespace simgear
#endif // SG_IO_SOCKET_HXX

22
simgear/io/sg_socket.cxx
View File

@@ -27,11 +27,9 @@
#include <simgear/compiler.h>
#if defined( sgi )
#include <strings.h>
#endif
#include <iostream>
#include <cstring>
#include <cstdlib> // for atoi
#include <simgear/debug/logstream.hxx>
@@ -52,8 +50,8 @@ SGSocket::SGSocket( const string& host, const string& port_,
{
if (!init)
{
netInit(NULL, NULL); // plib-1.4.2 compatible
init = true;
simgear::Socket::initSockets();
init = true;
}
if ( style == "tcp" )
@@ -326,7 +324,7 @@ SGSocket::readline( char *buf, int length )
int
SGSocket::write( const char *buf, const int length )
{
netSocket* s = client == 0 ? &sock : client;
simgear::Socket* s = client == 0 ? &sock : client;
if (s->getHandle() == -1)
{
return 0;
@@ -384,24 +382,24 @@ SGSocket::nonblock()
int
SGSocket::poll()
{
netSocket* readers[2];
simgear::Socket* readers[2];
readers[0] = client != 0 ? client : &sock;
readers[1] = 0;
netSocket* writers[1];
simgear::Socket* writers[1];
writers[0] = 0;
int result = netSocket::select( readers, writers, timeout );
int result = simgear::Socket::select( readers, writers, timeout );
if (result > 0 && is_server && client == 0)
{
// Accept a new client connection
netAddress addr;
simgear::IPAddress addr;
int new_fd = sock.accept( &addr );
SG_LOG( SG_IO, SG_INFO, "Accepted connection from "
<< addr.getHost() << ":" << addr.getPort() );
client = new netSocket();
client = new simgear::Socket();
client->setHandle( new_fd );
return 0;
}

24
simgear/io/sg_socket.hxx
View File

@@ -27,21 +27,13 @@
#ifndef _SG_SOCKET_HXX
#define _SG_SOCKET_HXX
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/compiler.h>
#include <string>
#include <simgear/math/sg_types.hxx>
#include <simgear/io/iochannel.hxx>
#include <plib/netSocket.h>
using std::string;
#include <simgear/io/raw_socket.hxx>
#define SG_MAX_SOCKET_QUEUE 32
@@ -52,14 +44,14 @@ using std::string;
class SGSocket : public SGIOChannel {
public:
private:
string hostname;
string port_str;
std::string hostname;
std::string port_str;
char save_buf[ 2 * SG_IO_MAX_MSG_SIZE ];
int save_len;
netSocket sock;
netSocket* client;
simgear::Socket sock;
simgear::Socket* client;
unsigned short port;
bool is_tcp;
bool is_server;
@@ -126,7 +118,7 @@ public:
* @param port port number if we care to choose one.
* @param style specify "udp" or "tcp"
*/
SGSocket( const string& host, const string& port, const string& style );
SGSocket( const std::string& host, const std::string& port, const std::string& style );
/** Destructor */
~SGSocket();
@@ -161,10 +153,10 @@ public:
inline void set_timeout(int i) { timeout = i; }
/** @return the remote host name */
inline string get_hostname() const { return hostname; }
inline std::string get_hostname() const { return hostname; }
/** @return the port number (in string form) */
inline string get_port_str() const { return port_str; }
inline std::string get_port_str() const { return port_str; }
};

6
simgear/io/sg_socket_udp.cxx
View File

@@ -26,14 +26,12 @@
#include <simgear/compiler.h>
#if defined( sgi )
#include <strings.h>
#endif
#include <simgear/debug/logstream.hxx>
#include "sg_socket_udp.hxx"
#include <cstring>
#include <cstdlib> // for atoi
SGSocketUDP::SGSocketUDP( const string& host, const string& port ) :
hostname(host),

19
simgear/io/sg_socket_udp.hxx
View File

@@ -28,20 +28,13 @@
#define _SG_SOCKET_UDP_HXX
#ifndef __cplusplus
# error This library requires C++
#endif
#include <plib/netSocket.h>
#include <simgear/compiler.h>
#include <string>
#include <simgear/math/sg_types.hxx>
#include <simgear/io/iochannel.hxx>
using std::string;
#include <simgear/io/raw_socket.hxx>
/**
* A UDP socket I/O class based on SGIOChannel and plib/net.
@@ -50,10 +43,10 @@ class SGSocketUDP : public SGIOChannel {
private:
netSocket sock;
simgear::Socket sock;
string hostname;
string port_str;
std::string hostname;
std::string port_str;
char save_buf[ 2 * SG_IO_MAX_MSG_SIZE ];
int save_len;
@@ -128,10 +121,10 @@ public:
bool setBlocking( bool value );
/** @return the remote host name */
inline string get_hostname() const { return hostname; }
inline std::string get_hostname() const { return hostname; }
/** @return the port number (in string form) */
inline string get_port_str() const { return port_str; }
inline std::string get_port_str() const { return port_str; }
};

27
simgear/misc/sg_dir.cxx
View File

@@ -80,6 +80,12 @@ PathList Dir::children(int types, const std::string& nameFilter) const
}
if (fData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
if (types & NO_DOT_OR_DOTDOT) {
if (!strcmp(fData.cFileName,".") || !strcmp(fData.cFileName,"..")) {
continue;
}
}
if (!(types & TYPE_DIR)) {
continue;
}
@@ -164,6 +170,27 @@ PathList Dir::children(int types, const std::string& nameFilter) const
return result;
}
bool Dir::exists() const
{
#ifdef _WIN32
struct _stat buf ;
if (_stat (_path.c_str(), &buf ) < 0) {
return false;
}
return ((S_IFDIR & buf.st_mode ) !=0);
#else
struct stat buf ;
if (stat(_path.c_str(), &buf ) < 0) {
return false ;
}
return ((S_ISDIR(buf.st_mode )) != 0);
#endif
}
SGPath Dir::file(const std::string& name) const
{
SGPath childPath = _path;

5
simgear/misc/sg_dir.hxx
View File

@@ -52,6 +52,11 @@ namespace simgear
PathList children(int types = 0, const std::string& nameGlob = "") const;
SGPath file(const std::string& name) const;
/**
* Check that the directory at the path exists (and is a directory!)
*/
bool exists() const;
private:
mutable SGPath _path;
};

31
simgear/misc/sg_path.cxx
View File

@@ -28,7 +28,6 @@
#include <simgear/debug/logstream.hxx>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/stat.h>
#ifdef _WIN32
# include <direct.h>
#endif
@@ -49,9 +48,7 @@ static const char sgSearchPathSep = ':';
#endif
// If Unix, replace all ":" with "/". If MacOS, replace all "/" with
// ":" it should go without saying that neither of these characters
// should be used in file or directory names. In windoze, allow the
// If Unix, replace all ":" with "/". In windoze, allow the
// second character to be a ":" for things like c:\foo\bar
void
@@ -172,13 +169,25 @@ string SGPath::extension() const {
}
}
bool SGPath::exists() const {
FILE* fp = fopen( path.c_str(), "r");
if (fp == 0) {
return false;
}
fclose(fp);
return true;
bool SGPath::exists() const
{
#ifdef _WIN32
struct _stat buf;
if (_stat(path.c_str(), &buf) < 0) {
return false;
}
return true;
#else
struct stat buf ;
if (stat(path.c_str(), &buf) < 0) {
return false ;
}
return true;
#endif
}
#ifdef _WIN32