API Docs for SAX and DOM                 XMLPlatformUtils Class Reference Utilities that must be implemented in a platform-specific way. More... #include <PlatformUtils.hpp> Collaboration diagram for XMLPlatformUtils: [legend]List of all members. Public Types Public Types enum   PanicReasons {   Panic_NoTransService, Panic_NoDefTranscoder, Panic_CantFindLib, Panic_UnknownMsgDomain,   Panic_CantLoadMsgDomain, Panic_SynchronizationErr, Panic_SystemInit, PanicReasons_Count } Static Public Methods void  registerLazyData (XMLDeleter* const deleter) void  cleanupLazyData () Initialization amd Panic methods void  Initialize ()   Perform per-process parser initialization. More... void  Terminate ()   Perform per-process parser termination. More... void  panic ( const PanicReasons reason )   The panic mechanism. More... File Methods unsigned int  curFilePos (FileHandle theFile)   Get the current file position. More... void  closeFile (FileHandle theFile)   Closes the file handle. More... unsigned int  fileSize (FileHandle theFile)   Returns the file size. More... FileHandle  openFile (const char* const fileName)   Opens the file. More... FileHandle  openFile (const XMLCh* const fileName)   Opens a named file. More... FileHandle  openStdInHandle ()   Opens the standard input as a file. More... unsigned int  readFileBuffer ( FileHandle theFile , const unsigned int toRead , XMLByte* const toFill )   Reads the file buffer. More... void  resetFile (FileHandle theFile)   Resets the file handle. More... File System Methods XMLCh*  getFullPath (const XMLCh* const srcPath)   Gets the full path from a relative path. More... bool  isRelative (const XMLCh* const toCheck)   Determines if a path is relative or absolute. More... XMLCh*  weavePaths ( const XMLCh* const basePath , const XMLCh* const relativePath )   Utility to join two paths. More... Timing Methods unsigned long  getCurrentMillis ()   Gets the system time in milliseconds. More... Mutex Methods void  closeMutex (void* const mtxHandle)   Closes a mutex handle. More... void  lockMutex (void* const mtxHandle)   Locks a mutex handle. More... void*  makeMutex ()   Make a new mutex. More... void  unlockMutex (void* const mtxHandle)   Unlocks a mutex. More... External Message Support XMLMsgLoader*  loadMsgSet (const XMLCh* const msgDomain)   Loads the message set from among the available domains. More... Miscellaneous synchronization methods void*  compareAndSwap ( void** toFill , const void* const newValue , const void* const toCompare )   Conditionally updates or returns a single word variable atomically. More... Atomic Increment and Decrement int  atomicIncrement (int& location)   Increments a single word variable atomically. More... int  atomicDecrement (int& location)   Decrements a single word variable atomically. More... Static Public Attributes Public Static Data XMLNetAccessor*  fgNetAccessor   The network accessor. More... XMLTransService*  fgTransService   The transcoding service. More... Detailed Description Utilities that must be implemented in a platform-specific way. This class contains methods that must be implemented in a platform specific manner. The actual implementations of these methods are available in the per-platform files indide src/util/Platforms . Member Enumeration Documentation enum XMLPlatformUtils::PanicReasons   Enumeration values: Panic_NoTransService   Panic_NoDefTranscoder   Panic_CantFindLib   Panic_UnknownMsgDomain   Panic_CantLoadMsgDomain   Panic_SynchronizationErr   Panic_SystemInit   PanicReasons_Count   Member Function Documentation void XMLPlatformUtils::Initialize ( ) [static]   Perform per-process parser initialization. Initialization must be called first in any client code. void XMLPlatformUtils::Terminate ( ) [static]   Perform per-process parser termination. The termination call is currently optional, to aid those dynamically loading the parser to clean up before exit, or to avoid spurious reports from leak detectors. int XMLPlatformUtils::atomicDecrement ( int & location ) [static]   Decrements a single word variable atomically. This must be implemented by the per-platform driver. The atomicDecrement subroutine increments one word in a single atomic operation. This operation is useful when a counter variable is shared between several threads or processes. When updating such a counter variable, it is important to make sure that the fetch, update, and store operations occur atomically (are not interruptible). Parameters: location   Specifies the address of the word variable to be decremented. Returns: The function return value is positive if the result of the operation was positive. Zero if the result of the operation was zero. Negative if the result of the operation was negative. Except for the zero case, the value returned may differ from the actual result of the operation - only the sign and zero/nonzero state is guaranteed to be correct. int XMLPlatformUtils::atomicIncrement ( int & location ) [static]   Increments a single word variable atomically. This must be implemented by the per-platform driver. The atomicIncrement subroutine increments one word in a single atomic operation. This operation is useful when a counter variable is shared between several threads or processes. When updating such a counter variable, it is important to make sure that the fetch, update, and store operations occur atomically (are not interruptible). Parameters: location   Specifies the address of the word variable to be incremented. Returns: The function return value is positive if the result of the operation was positive. Zero if the result of the operation was zero. Negative if the result of the operation was negative. Except for the zero case, the value returned may differ from the actual result of the operation - only the sign and zero/nonzero state is guaranteed to be correct. void XMLPlatformUtils::cleanupLazyData ( ) [static] void XMLPlatformUtils::closeFile ( FileHandle theFile ) [static]   Closes the file handle. This must be implemented by the per-platform driver, which should use local file services to close the passed file handle, and to destroy the passed file handle and any allocated data or system resources it contains. Parameters: theFile   The file handle to close void XMLPlatformUtils::closeMutex ( void *const mtxHandle ) [static]   Closes a mutex handle. Each per-platform driver must implement this. Only it knows what the actual content of the passed mutex handle is. Parameters: mtxHandle   The mutex handle that you want to close void * XMLPlatformUtils::compareAndSwap ( void ** toFill, const void *const newValue, const void *const toCompare ) [static]   Conditionally updates or returns a single word variable atomically. This must be implemented by the per-platform driver. The compareAndSwap subroutine performs an atomic operation which compares the contents of a single word variable with a stored old value. If the values are equal, a new value is stored in the single word variable and TRUE is returned; otherwise, the old value is set to the current value of the single word variable and FALSE is returned. The compareAndSwap subroutine is useful when a word value must be updated only if it has not been changed since it was last read. Note: The word containing the single word variable must be aligned on a full word boundary. Parameters: toFill   Specifies the address of the single word variable newValue   Specifies the new value to be conditionally assigned to the single word variable. toCompare   Specifies the address of the old value to be checked against (and conditionally updated with) the value of the single word variable. Returns: Returns the new value assigned to the single word variable unsigned int XMLPlatformUtils::curFilePos ( FileHandle theFile ) [static]   Get the current file position. This must be implemented by the per-platform driver, which should use local file services to deterine the current position within the passed file. Since the file API provided here only reads, if the host platform supports separate read/write positions, only the read position is of any interest, and hence should be the one returned. Parameters: theFile   The file handle unsigned int XMLPlatformUtils::fileSize ( FileHandle theFile ) [static]   Returns the file size. This must be implemented by the per-platform driver, which should use local file services to determine the current size of the file represented by the passed handle. Parameters: theFile   The file handle whose size you want Returns: Returns the size of the file in bytes unsigned long XMLPlatformUtils::getCurrentMillis ( ) [static]   Gets the system time in milliseconds. This must be implemented by the per-platform driver, which should use local services to return the current value of a running millisecond timer. Note that the value returned is only as accurate as the millisecond time of the underyling host system. Returns: Returns the system time as an unsigned long XMLCh * XMLPlatformUtils::getFullPath ( const XMLCh *const srcPath ) [static]   Gets the full path from a relative path. This must be implemented by the per-platform driver. It should complete a relative path using the 'current directory', or whatever the local equivalent of a current directory is. If the passed source path is actually fully qualified, then a straight copy of it will be returned. Parameters: srcPath   The path of the file for which you want the full path Returns: Returns the fully qualified path of the file name including the file name. This is dyanmically allocated and must be deleted by the caller when its no longer needed! bool XMLPlatformUtils::isRelative ( const XMLCh *const toCheck ) [static]   Determines if a path is relative or absolute. This must be implemented by the per-platform driver, which should determine whether the passed path is relative or not. The concept of relative and absolute might be... well relative on different platforms. But, as long as the determination is made consistently and in coordination with the weavePaths() method, it should work for any platform. Parameters: toCheck   The file name which you want to check Returns: Returns true if the filename appears to be relative XMLMsgLoader * XMLPlatformUtils::loadMsgSet ( const XMLCh *const msgDomain ) [static]   Loads the message set from among the available domains. The returned object must be dynamically allocated and the caller becomes responsible for cleaning it up. Parameters: msgDomain   The message domain which you want to load void XMLPlatformUtils::lockMutex ( void *const mtxHandle ) [static]   Locks a mutex handle. Each per-platform driver must implement this. Only it knows what the actual content of the passed mutex handle is. Parameters: mtxHandle   The mutex handle that you want to lock void * XMLPlatformUtils::makeMutex ( ) [static]   Make a new mutex. Each per-platform driver must implement this. Only it knows what the actual content of the passed mutex handle is. The returned handle pointer will be eventually passed to closeMutex() which is also implemented by the platform driver. FileHandle XMLPlatformUtils::openFile ( const XMLCh *const fileName ) [static]   Opens a named file. This must be implemented by the per-platform driver, which should use local file services to open the passed file. If it fails, a null handle pointer should be returned. Parameters: fileName   The string containing the name of the file Returns: The file handle of the opened file FileHandle XMLPlatformUtils::openFile ( const char *const fileName ) [static]   Opens the file. This must be implemented by the per-platform driver, which should use local file services to open passed file. If it fails, a null handle pointer should be returned. Parameters: fileName   The string containing the name of the file Returns: The file handle of the opened file FileHandle XMLPlatformUtils::openStdInHandle ( ) [static]   Opens the standard input as a file. This must be implemented by the per-platform driver, which should use local file services to open a handle to the standard input. It should be a copy of the standard input handle, since it will be closed later! Returns: The file handle of the standard input stream void XMLPlatformUtils::panic ( const PanicReasons reason ) [static]   The panic mechanism. If, during initialization, we cannot even get far enough along to get transcoding up or get message loading working, we call this method. Each platform can implement it however they want. This method is expected to display something meaningful and end the process. The enum indicates why its being called, to allow the per-platform code to display or log something more specific if desired. Parameters: reason   The enumeration that defines the cause of the failure unsigned int XMLPlatformUtils::readFileBuffer ( FileHandle theFile, const unsigned int toRead, XMLByte *const toFill ) [static]   Reads the file buffer. This must be implemented by the per-platform driver, which should use local file services to read up to 'toRead' bytes of data from the passed file, and return those bytes in the 'toFill' buffer. It is not an error not to read the requested number of bytes. When the end of file is reached, zero should be returned. Parameters: theFile   The file handle to be read from. toRead   The maximum number of byte to read from the current position toFill   The byte buffer to fill Returns: Returns the number of bytes read from the stream or file void XMLPlatformUtils::registerLazyData ( XMLDeleter *const deleter ) [static] void XMLPlatformUtils::resetFile ( FileHandle theFile ) [static]   Resets the file handle. This must be implemented by the per-platform driver which will use local file services to reset the file position to the start of the the file. Parameters: theFile   The file handle that you want to reset void XMLPlatformUtils::unlockMutex ( void *const mtxHandle ) [static]   Unlocks a mutex. Each per-platform driver must implement this. Only it knows what the actual content of the passed mutex handle is. Note that, since the underlying system synchronization services are used, Xerces cannot guarantee that lock/unlock operaitons are correctly enforced on a per-thread basis or that incorrect nesting of lock/unlock operations will be caught. Parameters: mtxGandle   The mutex handle that you want to unlock XMLCh * XMLPlatformUtils::weavePaths ( const XMLCh *const basePath, const XMLCh *const relativePath ) [static]   Utility to join two paths. This must be implemented by the per-platform driver, and should weave the relative path part together with the base part and return a new path that represents this combination. If the relative part turns out to be fully qualified, it will be returned as is. If it is not, then it will be woven onto the passed base path, by removing one path component for each leading "../" (or whatever is the equivalent in the local system) in the relative path. Parameters: basePath   The string containing the base path relativePath   The string containing the relative path Returns: Returns a string containing the 'woven' path. It should be dynamically allocated and becomes the responsibility of the caller to delete. Member Data Documentation XMLNetAccessor * XMLPlatformUtils::fgNetAccessor [static]   The network accessor. This is provided by the per-platform driver, so each platform can choose what actual implementation it wants to use. The object must be dynamically allocated. Note that you may optionally, if your platform driver does not install a network accessor, set it manually from your client code after calling Initialize(). This works because this object is not required during initialization, and only comes into play during actual XML parsing. XMLTransService * XMLPlatformUtils::fgTransService [static]   The transcoding service. This is provided by the per platform driver, so each platform can choose what implemenation it wants to use. When the platform independent initialization code needs to get a transcoding service object, it will call makeTransService() to ask the per-platform code to create one. Only one transcoding service object is reqeusted per-process, so it is shared and synchronized among parser instances within that process. The documentation for this class was generated from the following file: PlatformUtils.hpp

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