72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/*
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* Copyright (C) 2009 Apple, Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#ifndef BUFFER_H
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#define BUFFER_H 1
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <algorithm>
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/*
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* Encapsulation of a memory buffer. The contained buffer is
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* automatically deallocated when the containing Buffer object is
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* destructed, which simplifies functions with many early-exit
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* cases. To transfer ownership to the caller, swap it with a buffer
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* that was passed by reference, e.g:
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*
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* void my_func(Buffer *ret_buf) {
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* Buffer local_buf;
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* ... work on local_buf ...
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* local_buf.swap(ret_buf);
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* }
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*/
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class Buffer {
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public:
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Buffer() : _buf(NULL), _size(0) {}
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~Buffer() { free(); }
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// Allocate a buffer of given 'size'. Deletes any previous contents.
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void alloc(size_t size);
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// Allocate and load from a file.
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bool loadFromFile(const char *file);
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#if BOOTX2BIN_WITH_IMAGE4
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// Allocate and load a payload from an im4p format file, of expected 'type'.
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bool loadFromIm4p(const char *file, uint32_t type, bool quiet = false);
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#endif
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// Allocate and load a payload from an img3 format file, of expected 'type'.
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bool loadFromImg3(const char *file, uint32_t type);
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// Allocate and load a payload, automatically extracting the payload from
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// an im4p or img3 format file if detected, and otherwise raw. Will
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// return failure if im4p or img3 is detected but type does not match.
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bool loadFromAuto(const char *file, uint32_t type);
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void free();
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void swap(Buffer *other);
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void crop(size_t newSize);
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void *buf() { return _buf; }
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const void *buf() const { return _buf; }
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size_t size() const { return _size; }
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private:
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char *_buf;
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size_t _size;
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};
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#endif // BUFFER_H
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