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authorMaurus Cuelenaere <mcuelenaere@gmail.com>2008-07-11 15:50:46 +0000
committerMaurus Cuelenaere <mcuelenaere@gmail.com>2008-07-11 15:50:46 +0000
commit14c7f45cdae826f88dc539c8c38dd95caf305731 (patch)
tree832da054b7cfb2dc6fd63339af736625f31d21aa /utils/zenutils/libraries/pelib-0.9/pelib/IatDirectory.cpp
parent7c84ede3781c27db73403bd6302f320c76a58c8c (diff)
downloadrockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.tar.gz
rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.zip
Add zook's ZenUtils to SVN
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18010 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/zenutils/libraries/pelib-0.9/pelib/IatDirectory.cpp')
-rwxr-xr-xutils/zenutils/libraries/pelib-0.9/pelib/IatDirectory.cpp179
1 files changed, 179 insertions, 0 deletions
diff --git a/utils/zenutils/libraries/pelib-0.9/pelib/IatDirectory.cpp b/utils/zenutils/libraries/pelib-0.9/pelib/IatDirectory.cpp
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1/*
2* IatDirectory.h - Part of the PeLib library.
3*
4* Copyright (c) 2004 - 2005 Sebastian Porst (webmaster@the-interweb.com)
5* All rights reserved.
6*
7* This software is licensed under the zlib/libpng License.
8* For more details see http://www.opensource.org/licenses/zlib-license.php
9* or the license information file (license.htm) in the root directory
10* of PeLib.
11*/
12
13#include "IatDirectory.h"
14
15namespace PeLib
16{
17 int IatDirectory::read(InputBuffer& inputBuffer, unsigned int size)
18 {
19 dword dwAddr;
20
21 std::vector<dword> vIat;
22
23 for (unsigned int i=0;i<size/sizeof(dword);i++)
24 {
25 inputBuffer >> dwAddr;
26 vIat.push_back(dwAddr);
27 }
28
29 std::swap(vIat, m_vIat);
30
31 return NO_ERROR;
32 }
33
34 /**
35 * Reads the Import Address table from a file.
36 * @param strFilename Name of the file.
37 * @param dwOffset File offset of the IAT (see #PeFile::PeHeader::getIDIatRVA).
38 * @param dwSize Size of the IAT (see #PeFile::PeHeader::getIDIatSize).
39 **/
40 int IatDirectory::read(const std::string& strFilename, unsigned int dwOffset, unsigned int dwSize)
41 {
42 std::ifstream ifFile(strFilename.c_str(), std::ios::binary);
43
44 if (!ifFile)
45 {
46 return ERROR_OPENING_FILE;
47 }
48
49 if (fileSize(ifFile) < dwOffset + dwSize)
50 {
51 return ERROR_INVALID_FILE;
52 }
53
54 ifFile.seekg(dwOffset, std::ios::beg);
55
56 std::vector<byte> vBuffer(dwSize);
57 ifFile.read(reinterpret_cast<char*>(&vBuffer[0]), dwSize);
58
59 InputBuffer inpBuffer(vBuffer);
60 return read(inpBuffer, dwSize);
61 }
62
63 int IatDirectory::read(unsigned char* buffer, unsigned int buffersize)
64 {
65 std::vector<byte> vBuffer(buffer, buffer + buffersize);
66 InputBuffer inpBuffer(vBuffer);
67 return read(inpBuffer, buffersize);
68 }
69
70 /**
71 * Returns the number of fields in the IAT. This is equivalent to the number of
72 * imported functions.
73 * @return Number of fields in the IAT.
74 **/
75 unsigned int IatDirectory::calcNumberOfAddresses() const
76 {
77 return static_cast<unsigned int>(m_vIat.size());
78 }
79
80 /**
81 * Returns the dwValue of a field in the IAT.
82 * @param dwAddrnr Number identifying the field.
83 * @return dwValue of the field.
84 **/
85 dword IatDirectory::getAddress(unsigned int index) const
86 {
87 return m_vIat[index];
88 }
89
90 /**
91 * Updates the dwValue of a field in the IAT.
92 * @param dwAddrnr Number identifying the field.
93 * @param dwValue New dwValue of the field.
94 **/
95 void IatDirectory::setAddress(dword dwAddrnr, dword dwValue)
96 {
97 m_vIat[dwAddrnr] = dwValue;
98 }
99
100 /**
101 * Adds another field to the IAT.
102 * @param dwValue dwValue of the new field.
103 **/
104 void IatDirectory::addAddress(dword dwValue)
105 {
106 m_vIat.push_back(dwValue);
107 }
108
109 /**
110 * Removes an address from the IAT.
111 * @param dwAddrnr Number identifying the field.
112 **/
113 void IatDirectory::removeAddress(unsigned int index)
114 {
115 std::vector<dword>::iterator pos = m_vIat.begin() + index;
116 m_vIat.erase(pos);
117 }
118
119 /**
120 * Delete all entries from the IAT.
121 **/
122 void IatDirectory::clear()
123 {
124 m_vIat.clear();
125 }
126
127 /**
128 * Rebuilds the complete Import Address Table.
129 * @param vBuffer Buffer where the rebuilt IAT will be stored.
130 **/
131 void IatDirectory::rebuild(std::vector<byte>& vBuffer) const
132 {
133 vBuffer.reserve(size());
134 OutputBuffer obBuffer(vBuffer);
135
136 for (unsigned int i=0;i<m_vIat.size();i++)
137 {
138 obBuffer << m_vIat[i];
139 }
140 }
141
142 unsigned int IatDirectory::size() const
143 {
144 return static_cast<unsigned int>(m_vIat.size())* sizeof(dword);
145 }
146
147 /// Writes the current IAT to a file.
148 int IatDirectory::write(const std::string& strFilename, unsigned int uiOffset) const
149 {
150 std::fstream ofFile(strFilename.c_str(), std::ios_base::in);
151
152 if (!ofFile)
153 {
154 ofFile.clear();
155 ofFile.open(strFilename.c_str(), std::ios_base::out | std::ios_base::binary);
156 }
157 else
158 {
159 ofFile.close();
160 ofFile.open(strFilename.c_str(), std::ios_base::in | std::ios_base::out | std::ios_base::binary);
161 }
162
163 if (!ofFile)
164 {
165 return ERROR_OPENING_FILE;
166 }
167
168 ofFile.seekp(uiOffset, std::ios::beg);
169
170 std::vector<unsigned char> vBuffer;
171 rebuild(vBuffer);
172
173 ofFile.write(reinterpret_cast<const char*>(&vBuffer[0]), static_cast<unsigned int>(vBuffer.size()));
174
175 ofFile.close();
176
177 return NO_ERROR;
178 }
179}
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