1 /***************************************************************************
2 * Copyright (C) 2007 by Dominik Seichter *
3 * domseichter@web.de *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU Library General Public License as *
7 * published by the Free Software Foundation; either version 2 of the *
8 * License, or (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU Library General Public *
16 * License along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 * *
20 * In addition, as a special exception, the copyright holders give *
21 * permission to link the code of portions of this program with the *
22 * OpenSSL library under certain conditions as described in each *
23 * individual source file, and distribute linked combinations *
24 * including the two. *
25 * You must obey the GNU General Public License in all respects *
26 * for all of the code used other than OpenSSL. If you modify *
27 * file(s) with this exception, you may extend this exception to your *
28 * version of the file(s), but you are not obligated to do so. If you *
29 * do not wish to do so, delete this exception statement from your *
30 * version. If you delete this exception statement from all source *
31 * files in the program, then also delete it here. *
32 ***************************************************************************/
33
34 #include "PdfInputStream.h"
35
36 #include "PdfInputDevice.h"
37 #include "PdfDefinesPrivate.h"
38
39 #include <stdio.h>
40 #include <string.h>
41 #include <wchar.h>
42
43 namespace PoDoFo {
44
PdfFileInputStream(const char * pszFilename)45 PdfFileInputStream::PdfFileInputStream( const char* pszFilename )
46 {
47 m_hFile = fopen( pszFilename, "rb" );
48 if( !m_hFile )
49 {
50 PODOFO_RAISE_ERROR_INFO( ePdfError_FileNotFound, pszFilename );
51 }
52 }
53
54 #ifdef _WIN32
PdfFileInputStream(const wchar_t * pszFilename)55 PdfFileInputStream::PdfFileInputStream( const wchar_t* pszFilename )
56 {
57 m_hFile = _wfopen( pszFilename, L"rb" );
58 if( !m_hFile )
59 {
60 PdfError e( ePdfError_FileNotFound, __FILE__, __LINE__ );
61 e.SetErrorInformation( pszFilename );
62 throw e;
63 }
64 }
65 #endif // _WIN32
66
~PdfFileInputStream()67 PdfFileInputStream::~PdfFileInputStream()
68 {
69 if( m_hFile )
70 fclose( m_hFile );
71 }
72
Read(char * pBuffer,pdf_long lLen,pdf_long *)73 pdf_long PdfFileInputStream::Read( char* pBuffer, pdf_long lLen, pdf_long* )
74 {
75 if( !pBuffer )
76 {
77 PODOFO_RAISE_ERROR( ePdfError_InvalidHandle );
78 }
79
80 // return zero if EOF is reached
81 if( feof( m_hFile ) )
82 return 0;
83
84 // return the number of bytes read and read the data
85 // into pBuffer
86 return fread( pBuffer, sizeof(char), lLen, m_hFile );
87 }
88
GetFileLength()89 pdf_long PdfFileInputStream::GetFileLength()
90 {
91 pdf_long lOffset = ftello( m_hFile );
92 pdf_long lLen;
93
94 if( lOffset == -1 )
95 PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidDeviceOperation, "Failed to read current position in the file" );
96
97 if( fseeko( m_hFile, 0L, SEEK_END ) == -1 )
98 PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidDeviceOperation, "Failed to seek at the end of the file" );
99
100 lLen = ftello( m_hFile );
101 if( lLen == -1 )
102 PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidDeviceOperation, "Failed to read file length" );
103
104 if( fseeko( m_hFile, lOffset, SEEK_SET ) == -1 )
105 PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidDeviceOperation, "Failed to seek back to the previous position of the file" );
106
107 return lLen;
108 }
109
110 FILE*
GetHandle()111 PdfFileInputStream::GetHandle()
112 {
113 return m_hFile;
114 }
115
116
PdfMemoryInputStream(const char * pBuffer,pdf_long lBufferLen)117 PdfMemoryInputStream::PdfMemoryInputStream( const char* pBuffer, pdf_long lBufferLen )
118 : m_pBuffer( pBuffer ), m_pCur( pBuffer ), m_lBufferLen( lBufferLen )
119 {
120
121 }
122
~PdfMemoryInputStream()123 PdfMemoryInputStream::~PdfMemoryInputStream()
124 {
125 }
126
Read(char * pBuffer,pdf_long lLen,pdf_long *)127 pdf_long PdfMemoryInputStream::Read( char* pBuffer, pdf_long lLen, pdf_long* )
128 {
129 if( !pBuffer )
130 {
131 PODOFO_RAISE_ERROR( ePdfError_InvalidHandle );
132 }
133
134 pdf_long lRead = m_pCur - m_pBuffer;
135
136 // return zero if EOF is reached
137 if( lRead == m_lBufferLen )
138 return 0;
139
140 lLen = ( lRead + lLen <= m_lBufferLen ? lLen : m_lBufferLen - lRead );
141 memcpy( pBuffer, m_pCur, lLen );
142 m_pCur += lLen;
143
144 return lLen;
145 }
146
PdfDeviceInputStream(PdfInputDevice * pDevice)147 PdfDeviceInputStream::PdfDeviceInputStream( PdfInputDevice* pDevice )
148 : m_pDevice( pDevice )
149 {
150 }
151
~PdfDeviceInputStream()152 PdfDeviceInputStream::~PdfDeviceInputStream()
153 {
154 }
155
Read(char * pBuffer,pdf_long lLen,pdf_long *)156 pdf_long PdfDeviceInputStream::Read( char* pBuffer, pdf_long lLen, pdf_long* )
157 {
158 return m_pDevice->Read( pBuffer, lLen );
159 }
160
161 };
162