ebmlbinary.c 5.13 KB
Newer Older
Steve Lhomme's avatar
Steve Lhomme committed
1 2
/*
 * $Id$
3
 * Copyright (c) 2008-2010, Matroska (non-profit organisation)
Steve Lhomme's avatar
Steve Lhomme committed
4 5 6 7 8 9 10 11 12
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
13
 *     * Neither the name of the Matroska assocation nor the
Steve Lhomme's avatar
Steve Lhomme committed
14 15 16
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
17
 * THIS SOFTWARE IS PROVIDED BY the Matroska association ``AS IS'' AND ANY
Steve Lhomme's avatar
Steve Lhomme committed
18 19 20 21 22 23 24 25 26 27 28
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL The Matroska Foundation BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "ebml/ebml.h"
29
#include "ebml/ebml_internal.h"
Steve Lhomme's avatar
Steve Lhomme committed
30

31
static err_t ReadData(ebml_binary *Element, stream *Input, const ebml_parser_context *ParserContext, bool_t AllowDummyElt, int Scope, size_t DepthCheckCRC)
Steve Lhomme's avatar
Steve Lhomme committed
32 33 34 35 36 37 38 39 40 41 42 43 44 45
{
    err_t Result;

    Element->Base.bValueIsSet = 0;

    if (Scope == SCOPE_NO_DATA)
        return ERR_NONE;

    if (Stream_Seek(Input,EBML_ElementPositionData((ebml_element*)Element),SEEK_SET)==INVALID_FILEPOS_T)
    {
        Result = ERR_READ;
        goto failed;
    }

46
    if (!ArrayResize(&Element->Data,(size_t)Element->Base.DataSize,0))
Steve Lhomme's avatar
Steve Lhomme committed
47 48 49 50 51
    {
        Result = ERR_OUT_OF_MEMORY;
        goto failed;
    }

52
    Result = Stream_Read(Input,ARRAYBEGIN(Element->Data,void),(size_t)Element->Base.DataSize,NULL);
Steve Lhomme's avatar
Steve Lhomme committed
53 54 55 56 57 58 59
    if (Result == ERR_NONE)
        Element->Base.bValueIsSet = 1;
failed:
    return Result;
}

#if defined(CONFIG_EBML_WRITING)
60
static err_t RenderData(ebml_binary *Element, stream *Output, bool_t bForceWithoutMandatory, bool_t bWithDefault, filepos_t *Rendered)
Steve Lhomme's avatar
Steve Lhomme committed
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
{
    size_t Written;
    err_t Err = Stream_Write(Output,ARRAYBEGIN(Element->Data,uint8_t),ARRAYCOUNT(Element->Data,uint8_t),&Written);
    if (Rendered)
        *Rendered = Written;
    return Err;
}
#endif

static void Delete(ebml_binary *Element)
{
    ArrayClear(&Element->Data);
}

static bool_t IsDefaultValue(const ebml_binary *Element)
{
    return 0; // TODO: a default binary value needs a size too (use a structure to set the value in the structure)
}

80
static filepos_t UpdateDataSize(ebml_binary *Element, bool_t bWithDefault, bool_t bForceWithoutMandatory)
Steve Lhomme's avatar
Steve Lhomme committed
81
{
82
	Element->Base.DataSize = ARRAYCOUNT(Element->Data,uint8_t);
Steve Lhomme's avatar
Steve Lhomme committed
83

84
	return INHERITED(Element,ebml_element_vmt,EBML_BINARY_CLASS)->UpdateDataSize(Element, bWithDefault, bForceWithoutMandatory);
Steve Lhomme's avatar
Steve Lhomme committed
85 86
}

87 88
static bool_t ValidateSize(const ebml_element *p)
{
89
    return EBML_ElementIsFiniteSize(p);
90 91
}

92 93 94 95 96 97 98 99 100 101 102
static ebml_binary *Copy(const ebml_binary *Element, const void *Cookie)
{
    ebml_binary *Result = (ebml_binary*)EBML_ElementCreate(Element,Element->Base.Context,0,Cookie);
    if (Result)
    {
        ArrayCopy(&Result->Data,&Element->Data);
        Result->Base.bValueIsSet = Element->Base.bValueIsSet;
        Result->Base.DataSize = Element->Base.DataSize;
        Result->Base.ElementPosition = Element->Base.ElementPosition;
        Result->Base.SizeLength = Element->Base.SizeLength;
        Result->Base.SizePosition = Element->Base.SizePosition;
103
        Result->Base.bNeedDataSizeUpdate = Element->Base.bNeedDataSizeUpdate;
104 105 106 107
    }
    return Result;
}

Steve Lhomme's avatar
Steve Lhomme committed
108 109 110 111
META_START(EBMLBinary_Class,EBML_BINARY_CLASS)
META_CLASS(SIZE,sizeof(ebml_binary))
META_CLASS(DELETE,Delete)
META_DATA(TYPE_ARRAY,0,ebml_binary,Data)
112
META_VMT(TYPE_FUNC,ebml_element_vmt,ValidateSize,ValidateSize)
Steve Lhomme's avatar
Steve Lhomme committed
113 114
META_VMT(TYPE_FUNC,ebml_element_vmt,ReadData,ReadData)
META_VMT(TYPE_FUNC,ebml_element_vmt,IsDefaultValue,IsDefaultValue)
115
META_VMT(TYPE_FUNC,ebml_element_vmt,UpdateDataSize,UpdateDataSize)
Steve Lhomme's avatar
Steve Lhomme committed
116 117 118
#if defined(CONFIG_EBML_WRITING)
META_VMT(TYPE_FUNC,ebml_element_vmt,RenderData,RenderData)
#endif
119
META_VMT(TYPE_FUNC,ebml_element_vmt,Copy,Copy)
Steve Lhomme's avatar
Steve Lhomme committed
120 121 122 123 124 125 126
META_END(EBML_ELEMENT_CLASS)

err_t EBML_BinarySetData(ebml_binary *Element, const uint8_t *Data, size_t DataSize)
{
    if (!ArrayResize(&Element->Data,DataSize,0))
        return ERR_OUT_OF_MEMORY;
    memcpy(ARRAYBEGIN(Element->Data,void),Data,DataSize);
127
    Element->Base.DataSize = DataSize;
128
    Element->Base.bNeedDataSizeUpdate = 0;
Steve Lhomme's avatar
Steve Lhomme committed
129 130 131 132 133 134 135 136 137 138
    Element->Base.bValueIsSet = 1;
    return ERR_NONE;
}

const uint8_t *EBML_BinaryGetData(ebml_binary *Element)
{
    if (!ARRAYCOUNT(Element->Data,uint8_t))
        return NULL;
    return ARRAYBEGIN(Element->Data,uint8_t);
}