ACE_Read_Buffer Class Reference

Efficiently reads an artibrarily large buffer from an input stream up to and including a termination character. Also performs search/replace on single occurrences a character in the buffer using the principles of Integrated Layer Processing. More...

#include <Read_Buffer.h>

Collaboration diagram for ACE_Read_Buffer:
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List of all members.

Public Member Functions

 ACE_Read_Buffer (FILE *fp, bool close_on_delete=false, ACE_Allocator *=0)
 Read from a FILE *.
 ACE_Read_Buffer (ACE_HANDLE handle, bool close_on_delete=false, ACE_Allocator *=0)
 Read from an open HANDLE.
 ~ACE_Read_Buffer (void)
 Closes the FILE *.
char * read (int terminator=EOF, int search= '\n', int replace= '\0')
size_t replaced (void) const
 Returns the number of characters replaced during a read.
size_t size (void) const
ACE_Allocatoralloc (void) const
 Returns a pointer to its allocator.
void dump (void) const
 Dump the state of the object.

Private Member Functions

void operator= (const ACE_Read_Buffer &)
 ACE_Read_Buffer (const ACE_Read_Buffer &)
char * rec_read (int term, int search, int replace)
 Recursive helper method that does the work...

Private Attributes

size_t size_
 The total number of characters in the buffer.
size_t occurrences_
 The total number of characters replaced.
FILE * stream_
 The stream we are reading from.
bool const close_on_delete_
ACE_Allocatorallocator_
 Pointer to the allocator.

Detailed Description

Efficiently reads an artibrarily large buffer from an input stream up to and including a termination character. Also performs search/replace on single occurrences a character in the buffer using the principles of Integrated Layer Processing.

This implementation is optimized to do a single dynamic allocation and make only one copy of the data. It uses recursion and the run-time stack to accomplish this efficiently.


Constructor & Destructor Documentation

ACE_Read_Buffer::ACE_Read_Buffer ( FILE *  fp,
bool  close_on_delete = false,
ACE_Allocator alloc = 0 
)

Read from a FILE *.

ACE_Read_Buffer::ACE_Read_Buffer ( ACE_HANDLE  handle,
bool  close_on_delete = false,
ACE_Allocator alloc = 0 
)

Read from an open HANDLE.

ACE_Read_Buffer::~ACE_Read_Buffer ( void   ) 

Closes the FILE *.

ACE_Read_Buffer::ACE_Read_Buffer ( const ACE_Read_Buffer  )  [private]

Member Function Documentation

ACE_Allocator * ACE_Read_Buffer::alloc ( void   )  const [inline]

Returns a pointer to its allocator.

void ACE_Read_Buffer::dump ( void   )  const

Dump the state of the object.

void ACE_Read_Buffer::operator= ( const ACE_Read_Buffer  )  [private]
char * ACE_Read_Buffer::read ( int  terminator = EOF,
int  search = '\n',
int  replace = '\0' 
)

Returns a pointer dynamically allocated with ACE_Allocator::malloc to data from the input stream up to (and including) the terminator. If search is >= 0 then all occurrences of the search value are substituted with the replace value. The last of the byte of data is a 0, so that strlen can be used on it. The caller is responsible for freeing the pointer returned from this method using the ACE_Allocator::free.

char * ACE_Read_Buffer::rec_read ( int  term,
int  search,
int  replace 
) [private]

Recursive helper method that does the work...

size_t ACE_Read_Buffer::replaced ( void   )  const [inline]

Returns the number of characters replaced during a read.

size_t ACE_Read_Buffer::size ( void   )  const [inline]

Returns the size of the allocated buffer obtained during a read, not including the null terminator.


Member Data Documentation

Pointer to the allocator.

bool const ACE_Read_Buffer::close_on_delete_ [private]

Keeps track of whether we should close the FILE in the destructor.

The total number of characters replaced.

size_t ACE_Read_Buffer::size_ [private]

The total number of characters in the buffer.

FILE* ACE_Read_Buffer::stream_ [private]

The stream we are reading from.


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