1 /*
2 Source File : InputByteArrayStream.cpp
3
4
5 Copyright 2011 Gal Kahana PDFWriter
6
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
10
11 http://www.apache.org/licenses/LICENSE-2.0
12
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18
19
20 */
21 #include "InputByteArrayStream.h"
22 #include <memory.h>
23
InputByteArrayStream()24 InputByteArrayStream::InputByteArrayStream()
25 {
26 mByteArray = NULL;
27 }
28
InputByteArrayStream(Byte * inByteArray,LongFilePositionType inArrayLength)29 InputByteArrayStream::InputByteArrayStream(Byte* inByteArray,LongFilePositionType inArrayLength)
30 {
31 mByteArray = inByteArray;
32 mArrayLength = inArrayLength;
33 mCurrentPosition = 0;
34 }
35
~InputByteArrayStream(void)36 InputByteArrayStream::~InputByteArrayStream(void)
37 {
38 }
39
Assign(IOBasicTypes::Byte * inByteArray,IOBasicTypes::LongFilePositionType inArrayLength)40 void InputByteArrayStream::Assign(IOBasicTypes::Byte* inByteArray,IOBasicTypes::LongFilePositionType inArrayLength)
41 {
42 mByteArray = inByteArray;
43 mArrayLength = inArrayLength;
44 mCurrentPosition = 0;
45 }
46
Read(IOBasicTypes::Byte * inBuffer,IOBasicTypes::LongBufferSizeType inBufferSize)47 LongBufferSizeType InputByteArrayStream::Read(IOBasicTypes::Byte* inBuffer,IOBasicTypes::LongBufferSizeType inBufferSize)
48 {
49 if(!mByteArray)
50 return 0;
51
52 LongBufferSizeType amountToRead =
53 inBufferSize < (LongBufferSizeType)(mArrayLength-mCurrentPosition) ?
54 inBufferSize :
55 (LongBufferSizeType)(mArrayLength-mCurrentPosition);
56
57 if(amountToRead>0)
58 memcpy(inBuffer,mByteArray+mCurrentPosition,amountToRead);
59 mCurrentPosition+= amountToRead;
60 return amountToRead;
61 }
62
NotEnded()63 bool InputByteArrayStream::NotEnded()
64 {
65 return mByteArray && mCurrentPosition < mArrayLength;
66
67 }
68
Skip(LongBufferSizeType inSkipSize)69 void InputByteArrayStream::Skip(LongBufferSizeType inSkipSize)
70 {
71 mCurrentPosition+= inSkipSize < (LongBufferSizeType)mArrayLength-mCurrentPosition ? inSkipSize : mArrayLength-mCurrentPosition;
72 }
73
SetPosition(LongFilePositionType inOffsetFromStart)74 void InputByteArrayStream::SetPosition(LongFilePositionType inOffsetFromStart)
75 {
76 mCurrentPosition = inOffsetFromStart > mArrayLength ? mArrayLength:inOffsetFromStart;
77 }
78
SetPositionFromEnd(LongFilePositionType inOffsetFromEnd)79 void InputByteArrayStream::SetPositionFromEnd(LongFilePositionType inOffsetFromEnd)
80 {
81 mCurrentPosition = inOffsetFromEnd > mArrayLength ? 0:(mArrayLength-inOffsetFromEnd);
82 }
83
GetCurrentPosition()84 LongFilePositionType InputByteArrayStream::GetCurrentPosition()
85 {
86 return mCurrentPosition;
87 }
88