1 files changed, 114 insertions, 0 deletions
diff --git a/ace/Memory/Read_Buffer.h b/ace/Memory/Read_Buffer.h
new file mode 100644
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--- /dev/null
+++ b/ace/Memory/Read_Buffer.h
@@ -0,0 +1,114 @@
+/* -*- C++ -*- */
+
+//=============================================================================
+/**
+ *  @file    Read_Buffer.h
+ *
+ *  $Id$
+ *
+ *  @author Doug Schmidt and Seth Widoff
+ */
+//=============================================================================
+
+
+#ifndef ACE_READ_BUFFER_H
+#define ACE_READ_BUFFER_H
+#include "ace/pre.h"
+
+#include "ace/ACE.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/Malloc.h"
+
+/**
+ * @class ACE_Read_Buffer
+ *
+ * @brief 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.
+ */
+class ACE_Export ACE_Read_Buffer
+{
+public:
+  // = Initialization and termination methods.
+  /// Read from a FILE *.
+  ACE_Read_Buffer (FILE *fp,
+                   int close_on_delete = 0,
+                   ACE_Allocator * = 0);
+
+  /// Read from an open HANDLE.
+  ACE_Read_Buffer (ACE_HANDLE handle,
+                   int close_on_delete = 0,
+                   ACE_Allocator * = 0);
+
+  /// Closes the FILE *.
+  ~ACE_Read_Buffer (void);
+
+  /**
+   * 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 *read (int terminator = EOF,
+              int search = '\n',
+              int replace = '\0');
+
+  /// Returns the number of characters replaced during a <read>.
+  size_t replaced (void) const;
+
+  /// Returns the size of the allocated buffer obtained during a
+  /// <read>, not including the null terminator.
+  size_t size (void) const;
+
+  /// Returns a pointer to its allocator.
+  ACE_Allocator *alloc (void) const;
+
+  /// Dump the state of the object.
+  void dump (void) const;
+
+private:
+  /// Recursive helper method that does the work...
+  char *rec_read (int term, int search, int replace);
+
+  /// The total number of characters in the buffer.
+  size_t size_;
+
+  /// The total number of characters replaced.
+  size_t occurrences_;
+
+  /// The stream we are reading from.
+  FILE *stream_;
+
+  /// Keeps track of whether we should close the FILE in the
+  /// destructor.
+  int close_on_delete_;
+
+  /// Pointer to the allocator.
+  ACE_Allocator *allocator_;
+
+  // = Disallow copying and assignment...
+  ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Read_Buffer &))
+  ACE_UNIMPLEMENTED_FUNC (ACE_Read_Buffer (const ACE_Read_Buffer &))
+};
+
+#if defined (__ACE_INLINE__)
+# include "ace/Read_Buffer.i"
+#endif /* __ACE_INLINE__ */
+
+#include "ace/post.h"
+#endif /* ACE_READ_BUFFER_H */