Security-57031.1.35.tar.gz

[apple/security.git] / libsecurity_utilities / lib / buffers.h

diff --git a/libsecurity_utilities/lib/buffers.h b/libsecurity_utilities/lib/buffers.h
deleted file mode 100644 (file)
index 65a0eef..0000000
--- a/libsecurity_utilities/lib/buffers.h
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- * Copyright (c) 2000-2001,2003-2004 Apple Computer, Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// buffer - simple data buffers with convenience
-//
-#ifndef _H_BUFFER
-#define _H_BUFFER
-
-#include <security_utilities/utilities.h>
-#include <cstdarg>
-#include <limits.h>
-
-
-namespace Security {
-
-
-class Buffer {
-public:
-    Buffer(size_t size);                       // allocate empty buffer
-    ~Buffer();
-    
-    static Buffer reader(void *base, size_t size, bool owned = false)
-    { return Buffer(base, size, true, owned); }
-    static Buffer writer(void *base, size_t size, bool owned = false)
-    { return Buffer(base, size, false, owned); }
-    
-    size_t available(bool heavy = false) const
-    { return heavy ? ((mTop - mEnd) + (mStart - mBase)): (mTop - mEnd); }
-    bool isFull(bool heavy = false) const
-    { return heavy ? (mEnd == mTop && mStart == mBase) : (mEnd == mTop); }
-    bool isEmpty() const               { return mStart == mEnd; }
-
-    size_t length() const              { return mEnd - mStart; }
-    void *data()                               { assert(mStart == mBase); return mStart; }
-    
-    void clear()                               { mStart = mEnd = mBase; }
-    
-protected:
-    // private constructor with full flexibility
-    Buffer(void *base, size_t size, bool filled, bool owned = false);
-    
-    // perform expensive realignment to coalesce freespace
-    size_t shuffle(size_t needed = UINT_MAX);
-    
-    // perform cheap adjustments after data was taken out
-    void adjustGet()
-    {
-        if (isEmpty()) // empty buffer. Reset pointers to base
-            mStart = mEnd = mBase;
-    }
-    
-public:
-    // elementary put: copy mode
-    size_t put(const void *data, size_t length)
-    {
-        if (length > available())
-            length = shuffle(length);
-        memcpy(mEnd, data, length);
-        mEnd += length;
-        return length;
-    }
-
-    // elementary put: locate mode. Remember that each can shuffle memory
-    template <class T> void locatePut(T * &addr, size_t &length)
-    {
-        if (length > available())
-            length = shuffle(length);
-        addr = reinterpret_cast<T *>(mEnd);
-    }
-    
-    void usePut(size_t length)
-    {
-        assert(length <= available());
-        mEnd += length;
-    }
-    
-    // elementary get: locate mode
-    template <class T> void locateGet(T * &addr, size_t &length)
-    {
-        if (length > size_t(mEnd - mStart))
-            length = mEnd - mStart;
-        addr = reinterpret_cast<T *>(mStart);
-    }
-    
-    void useGet(size_t length)
-    {
-        assert(length <= this->length());
-        mStart += length;
-        adjustGet();
-    }
-    
-    //
-    // I/O via FileDescoid objects
-    //
-    template <class IO>
-    size_t read(IO &io, size_t length)
-    {
-        if (length > available())
-            length = shuffle(length);
-        size_t bytesRead = io.read(mEnd, length);
-        mEnd += bytesRead;
-        return bytesRead;
-    }
-    
-    template <class IO>
-    size_t write(IO &io, size_t length)
-    {
-        length = min(this->length(), length);
-        size_t bytesWritten = io.write(mStart, length);
-        mStart += bytesWritten;
-        adjustGet();
-        return bytesWritten;
-    }
-
-    template <class IO> size_t read(IO &io, bool heavy = false)
-    { return read(io, available(heavy)); }
-    
-    template <class IO> size_t write(IO &io)
-    { return write(io, length()); }
-
-    // printf-style output to a buffer
-    void printf(const char *format, ...);
-    void vprintf(const char *format, va_list args);
-
-    // memory ownership
-    void own()         { mOwningMemory = true; }
-    
-private:
-    char *const mBase;                 // base pointer
-    char *const mTop;                  // end pointer + 1
-    char *mStart;                              // start of used area
-    char *mEnd;                                        // end of used area + 1
-    bool mOwningMemory;                        // true if we own the memory (free on destruction)
-};
-
-
-}      // end namespace Security
-
-
-#endif //_H_BUFFER