1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #include "OgreStableHeaders.h" |
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30 | #include "OgreDataStream.h" |
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31 | #include "OgreLogManager.h" |
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32 | #include "OgreException.h" |
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33 | |
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34 | namespace Ogre { |
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35 | |
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36 | //----------------------------------------------------------------------- |
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37 | //----------------------------------------------------------------------- |
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38 | template <typename T> DataStream& DataStream::operator >>(T& val) |
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39 | { |
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40 | read(static_cast<void*>(&val), sizeof(T)); |
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41 | return *this; |
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42 | } |
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43 | //----------------------------------------------------------------------- |
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44 | String DataStream::getLine(bool trimAfter) |
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45 | { |
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46 | char tmpBuf[OGRE_STREAM_TEMP_SIZE]; |
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47 | String retString; |
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48 | size_t readCount; |
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49 | // Keep looping while not hitting delimiter |
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50 | while ((readCount = read(tmpBuf, OGRE_STREAM_TEMP_SIZE-1)) != 0) |
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51 | { |
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52 | // Terminate string |
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53 | tmpBuf[readCount] = '\0'; |
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54 | |
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55 | char* p = strchr(tmpBuf, '\n'); |
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56 | if (p != 0) |
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57 | { |
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58 | // Reposition backwards |
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59 | skip((long)(p + 1 - tmpBuf - readCount)); |
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60 | *p = '\0'; |
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61 | } |
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62 | |
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63 | retString += tmpBuf; |
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64 | |
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65 | if (p != 0) |
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66 | { |
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67 | // Trim off trailing CR if this was a CR/LF entry |
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68 | if (retString.length() && retString[retString.length()-1] == '\r') |
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69 | { |
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70 | retString.erase(retString.length()-1, 1); |
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71 | } |
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72 | |
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73 | // Found terminator, break out |
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74 | break; |
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75 | } |
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76 | } |
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77 | |
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78 | if (trimAfter) |
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79 | { |
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80 | StringUtil::trim(retString); |
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81 | } |
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82 | |
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83 | return retString; |
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84 | } |
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85 | //----------------------------------------------------------------------- |
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86 | size_t DataStream::readLine(char* buf, size_t maxCount, const String& delim) |
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87 | { |
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88 | // Deal with both Unix & Windows LFs |
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89 | bool trimCR = false; |
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90 | if (delim.find_first_of('\n') != String::npos) |
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91 | { |
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92 | trimCR = true; |
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93 | } |
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94 | |
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95 | char tmpBuf[OGRE_STREAM_TEMP_SIZE]; |
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96 | size_t chunkSize = std::min(maxCount, (size_t)OGRE_STREAM_TEMP_SIZE-1); |
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97 | size_t totalCount = 0; |
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98 | size_t readCount; |
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99 | while (chunkSize && (readCount = read(tmpBuf, chunkSize))) |
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100 | { |
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101 | // Terminate |
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102 | tmpBuf[readCount] = '\0'; |
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103 | |
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104 | // Find first delimiter |
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105 | size_t pos = strcspn(tmpBuf, delim.c_str()); |
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106 | |
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107 | if (pos < readCount) |
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108 | { |
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109 | // Found terminator, reposition backwards |
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110 | skip((long)(pos + 1 - readCount)); |
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111 | } |
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112 | |
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113 | // Are we genuinely copying? |
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114 | if (buf) |
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115 | { |
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116 | memcpy(buf+totalCount, tmpBuf, pos); |
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117 | } |
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118 | totalCount += pos; |
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119 | |
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120 | if (pos < readCount) |
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121 | { |
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122 | // Trim off trailing CR if this was a CR/LF entry |
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123 | if (trimCR && totalCount && buf[totalCount-1] == '\r') |
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124 | { |
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125 | --totalCount; |
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126 | } |
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127 | |
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128 | // Found terminator, break out |
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129 | break; |
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130 | } |
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131 | |
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132 | // Adjust chunkSize for next time |
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133 | chunkSize = std::min(maxCount-totalCount, (size_t)OGRE_STREAM_TEMP_SIZE-1); |
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134 | } |
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135 | |
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136 | // Terminate |
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137 | buf[totalCount] = '\0'; |
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138 | |
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139 | return totalCount; |
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140 | } |
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141 | //----------------------------------------------------------------------- |
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142 | size_t DataStream::skipLine(const String& delim) |
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143 | { |
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144 | char tmpBuf[OGRE_STREAM_TEMP_SIZE]; |
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145 | size_t total = 0; |
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146 | size_t readCount; |
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147 | // Keep looping while not hitting delimiter |
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148 | while ((readCount = read(tmpBuf, OGRE_STREAM_TEMP_SIZE-1)) != 0) |
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149 | { |
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150 | // Terminate string |
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151 | tmpBuf[readCount] = '\0'; |
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152 | |
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153 | // Find first delimiter |
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154 | size_t pos = strcspn(tmpBuf, delim.c_str()); |
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155 | |
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156 | if (pos < readCount) |
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157 | { |
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158 | // Found terminator, reposition backwards |
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159 | skip((long)(pos + 1 - readCount)); |
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160 | |
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161 | total += pos + 1; |
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162 | |
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163 | // break out |
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164 | break; |
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165 | } |
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166 | |
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167 | total += readCount; |
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168 | } |
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169 | |
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170 | return total; |
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171 | } |
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172 | //----------------------------------------------------------------------- |
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173 | String DataStream::getAsString(void) |
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174 | { |
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175 | // Read the entire buffer |
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176 | char* pBuf = new char[mSize+1]; |
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177 | // Ensure read from begin of stream |
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178 | seek(0); |
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179 | read(pBuf, mSize); |
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180 | pBuf[mSize] = '\0'; |
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181 | String str; |
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182 | str.insert(0, pBuf, mSize); |
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183 | delete [] pBuf; |
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184 | return str; |
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185 | } |
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186 | //----------------------------------------------------------------------- |
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187 | //----------------------------------------------------------------------- |
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188 | MemoryDataStream::MemoryDataStream(void* pMem, size_t size, bool freeOnClose) |
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189 | : DataStream() |
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190 | { |
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191 | mData = mPos = static_cast<uchar*>(pMem); |
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192 | mSize = size; |
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193 | mEnd = mData + mSize; |
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194 | mFreeOnClose = freeOnClose; |
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195 | } |
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196 | //----------------------------------------------------------------------- |
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197 | MemoryDataStream::MemoryDataStream(const String& name, void* pMem, size_t size, |
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198 | bool freeOnClose) |
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199 | : DataStream(name) |
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200 | { |
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201 | mData = mPos = static_cast<uchar*>(pMem); |
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202 | mSize = size; |
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203 | mEnd = mData + mSize; |
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204 | mFreeOnClose = freeOnClose; |
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205 | } |
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206 | //----------------------------------------------------------------------- |
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207 | MemoryDataStream::MemoryDataStream(DataStream& sourceStream, |
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208 | bool freeOnClose) |
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209 | : DataStream() |
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210 | { |
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211 | // Copy data from incoming stream |
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212 | mSize = sourceStream.size(); |
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213 | mData = new uchar[mSize]; |
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214 | sourceStream.read(mData, mSize); |
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215 | mPos = mData; |
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216 | mEnd = mData + mSize; |
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217 | mFreeOnClose = freeOnClose; |
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218 | } |
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219 | //----------------------------------------------------------------------- |
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220 | MemoryDataStream::MemoryDataStream(DataStreamPtr& sourceStream, |
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221 | bool freeOnClose) |
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222 | : DataStream() |
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223 | { |
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224 | // Copy data from incoming stream |
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225 | mSize = sourceStream->size(); |
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226 | mData = new uchar[mSize]; |
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227 | sourceStream->read(mData, mSize); |
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228 | mPos = mData; |
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229 | mEnd = mData + mSize; |
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230 | mFreeOnClose = freeOnClose; |
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231 | } |
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232 | //----------------------------------------------------------------------- |
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233 | MemoryDataStream::MemoryDataStream(const String& name, DataStream& sourceStream, |
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234 | bool freeOnClose) |
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235 | : DataStream(name) |
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236 | { |
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237 | // Copy data from incoming stream |
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238 | mSize = sourceStream.size(); |
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239 | mData = new uchar[mSize]; |
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240 | sourceStream.read(mData, mSize); |
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241 | mPos = mData; |
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242 | mEnd = mData + mSize; |
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243 | mFreeOnClose = freeOnClose; |
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244 | } |
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245 | //----------------------------------------------------------------------- |
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246 | MemoryDataStream::MemoryDataStream(const String& name, const DataStreamPtr& sourceStream, |
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247 | bool freeOnClose) |
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248 | : DataStream(name) |
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249 | { |
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250 | // Copy data from incoming stream |
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251 | mSize = sourceStream->size(); |
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252 | mData = new uchar[mSize]; |
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253 | sourceStream->read(mData, mSize); |
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254 | mPos = mData; |
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255 | mEnd = mData + mSize; |
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256 | mFreeOnClose = freeOnClose; |
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257 | } |
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258 | //----------------------------------------------------------------------- |
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259 | MemoryDataStream::MemoryDataStream(size_t size, bool freeOnClose) |
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260 | : DataStream() |
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261 | { |
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262 | mSize = size; |
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263 | mFreeOnClose = freeOnClose; |
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264 | mData = new uchar[size]; |
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265 | mPos = mData; |
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266 | mEnd = mData + mSize; |
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267 | } |
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268 | //----------------------------------------------------------------------- |
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269 | MemoryDataStream::MemoryDataStream(const String& name, size_t size, |
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270 | bool freeOnClose) |
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271 | : DataStream(name) |
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272 | { |
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273 | mSize = size; |
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274 | mFreeOnClose = freeOnClose; |
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275 | mData = new uchar[size]; |
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276 | mPos = mData; |
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277 | mEnd = mData + mSize; |
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278 | } |
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279 | //----------------------------------------------------------------------- |
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280 | MemoryDataStream::~MemoryDataStream() |
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281 | { |
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282 | close(); |
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283 | } |
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284 | //----------------------------------------------------------------------- |
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285 | size_t MemoryDataStream::read(void* buf, size_t count) |
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286 | { |
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287 | size_t cnt = count; |
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288 | // Read over end of memory? |
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289 | if (mPos + cnt > mEnd) |
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290 | cnt = mEnd - mPos; |
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291 | if (cnt == 0) |
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292 | return 0; |
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293 | |
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294 | memcpy(buf, mPos, cnt); |
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295 | mPos += cnt; |
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296 | return cnt; |
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297 | } |
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298 | //----------------------------------------------------------------------- |
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299 | size_t MemoryDataStream::readLine(char* buf, size_t maxCount, |
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300 | const String& delim) |
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301 | { |
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302 | // Deal with both Unix & Windows LFs |
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303 | bool trimCR = false; |
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304 | if (delim.find_first_of('\n') != String::npos) |
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305 | { |
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306 | trimCR = true; |
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307 | } |
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308 | |
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309 | size_t pos = 0; |
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310 | |
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311 | // Make sure pos can never go past the end of the data |
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312 | while (pos < maxCount && mPos < mEnd) |
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313 | { |
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314 | if (delim.find(*mPos) != String::npos) |
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315 | { |
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316 | // Trim off trailing CR if this was a CR/LF entry |
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317 | if (trimCR && pos && buf[pos-1] == '\r') |
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318 | { |
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319 | // terminate 1 character early |
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320 | --pos; |
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321 | } |
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322 | |
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323 | // Found terminator, skip and break out |
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324 | ++mPos; |
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325 | break; |
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326 | } |
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327 | |
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328 | buf[pos++] = *mPos++; |
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329 | } |
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330 | |
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331 | // terminate |
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332 | buf[pos] = '\0'; |
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333 | |
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334 | return pos; |
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335 | } |
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336 | //----------------------------------------------------------------------- |
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337 | size_t MemoryDataStream::skipLine(const String& delim) |
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338 | { |
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339 | size_t pos = 0; |
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340 | |
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341 | // Make sure pos can never go past the end of the data |
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342 | while (mPos < mEnd) |
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343 | { |
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344 | ++pos; |
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345 | if (delim.find(*mPos++) != String::npos) |
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346 | { |
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347 | // Found terminator, break out |
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348 | break; |
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349 | } |
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350 | } |
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351 | |
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352 | return pos; |
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353 | |
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354 | } |
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355 | //----------------------------------------------------------------------- |
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356 | void MemoryDataStream::skip(long count) |
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357 | { |
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358 | size_t newpos = (size_t)( ( mPos - mData ) + count ); |
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359 | assert( mData + newpos <= mEnd ); |
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360 | |
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361 | mPos = mData + newpos; |
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362 | } |
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363 | //----------------------------------------------------------------------- |
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364 | void MemoryDataStream::seek( size_t pos ) |
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365 | { |
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366 | assert( mData + pos <= mEnd ); |
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367 | mPos = mData + pos; |
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368 | } |
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369 | //----------------------------------------------------------------------- |
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370 | size_t MemoryDataStream::tell(void) const |
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371 | { |
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372 | //mData is start, mPos is current location |
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373 | return mPos - mData; |
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374 | } |
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375 | //----------------------------------------------------------------------- |
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376 | bool MemoryDataStream::eof(void) const |
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377 | { |
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378 | return mPos >= mEnd; |
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379 | } |
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380 | //----------------------------------------------------------------------- |
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381 | void MemoryDataStream::close(void) |
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382 | { |
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383 | if (mFreeOnClose && mData) |
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384 | { |
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385 | delete [] mData; |
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386 | mData = 0; |
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387 | } |
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388 | |
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389 | } |
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390 | //----------------------------------------------------------------------- |
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391 | //----------------------------------------------------------------------- |
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392 | FileStreamDataStream::FileStreamDataStream(std::ifstream* s, bool freeOnClose) |
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393 | : DataStream(), mpStream(s), mFreeOnClose(freeOnClose) |
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394 | { |
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395 | // calculate the size |
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396 | mpStream->seekg(0, std::ios_base::end); |
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397 | mSize = mpStream->tellg(); |
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398 | mpStream->seekg(0, std::ios_base::beg); |
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399 | |
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400 | } |
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401 | //----------------------------------------------------------------------- |
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402 | FileStreamDataStream::FileStreamDataStream(const String& name, |
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403 | std::ifstream* s, bool freeOnClose) |
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404 | : DataStream(name), mpStream(s), mFreeOnClose(freeOnClose) |
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405 | { |
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406 | // calculate the size |
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407 | mpStream->seekg(0, std::ios_base::end); |
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408 | mSize = mpStream->tellg(); |
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409 | mpStream->seekg(0, std::ios_base::beg); |
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410 | } |
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411 | //----------------------------------------------------------------------- |
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412 | FileStreamDataStream::FileStreamDataStream(const String& name, |
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413 | std::ifstream* s, size_t size, bool freeOnClose) |
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414 | : DataStream(name), mpStream(s), mFreeOnClose(freeOnClose) |
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415 | { |
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416 | // Size is passed in |
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417 | mSize = size; |
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418 | } |
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419 | //----------------------------------------------------------------------- |
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420 | FileStreamDataStream::~FileStreamDataStream() |
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421 | { |
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422 | close(); |
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423 | } |
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424 | //----------------------------------------------------------------------- |
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425 | size_t FileStreamDataStream::read(void* buf, size_t count) |
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426 | { |
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427 | mpStream->read(static_cast<char*>(buf), static_cast<std::streamsize>(count)); |
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428 | return mpStream->gcount(); |
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429 | } |
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430 | //----------------------------------------------------------------------- |
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431 | size_t FileStreamDataStream::readLine(char* buf, size_t maxCount, |
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432 | const String& delim) |
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433 | { |
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434 | if (delim.empty()) |
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435 | { |
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436 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "No delimiter provided", |
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437 | "FileStreamDataStream::readLine"); |
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438 | } |
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439 | if (delim.size() > 1) |
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440 | { |
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441 | LogManager::getSingleton().logMessage( |
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442 | "WARNING: FileStreamDataStream::readLine - using only first delimeter"); |
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443 | } |
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444 | // Deal with both Unix & Windows LFs |
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445 | bool trimCR = false; |
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446 | if (delim.at(0) == '\n') |
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447 | { |
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448 | trimCR = true; |
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449 | } |
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450 | // maxCount + 1 since count excludes terminator in getline |
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451 | mpStream->getline(buf, static_cast<std::streamsize>(maxCount+1), delim.at(0)); |
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452 | size_t ret = mpStream->gcount(); |
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453 | // three options |
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454 | // 1) we had an eof before we read a whole line |
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455 | // 2) we ran out of buffer space |
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456 | // 3) we read a whole line - in this case the delim character is taken from the stream but not written in the buffer so the read data is of length ret-1 and thus ends at index ret-2 |
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457 | // in all cases the buffer will be null terminated for us |
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458 | |
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459 | if (mpStream->eof()) |
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460 | { |
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461 | // no problem |
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462 | } |
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463 | else if (mpStream->fail()) |
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464 | { |
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465 | // Did we fail because of maxCount hit? No - no terminating character |
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466 | // in included in the count in this case |
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467 | if (ret == maxCount) |
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468 | { |
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469 | // clear failbit for next time |
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470 | mpStream->clear(); |
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471 | } |
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472 | else |
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473 | { |
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474 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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475 | "Streaming error occurred", |
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476 | "FileStreamDataStream::readLine"); |
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477 | } |
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478 | } |
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479 | else |
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480 | { |
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481 | // we need to adjust ret because we want to use it as a |
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482 | // pointer to the terminating null character and it is |
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483 | // currently the length of the data read from the stream |
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484 | // i.e. 1 more than the length of the data in the buffer and |
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485 | // hence 1 more than the _index_ of the NULL character |
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486 | --ret; |
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487 | } |
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488 | |
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489 | // trim off CR if we found CR/LF |
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490 | if (trimCR && buf[ret-1] == '\r') |
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491 | { |
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492 | --ret; |
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493 | buf[ret] = '\0'; |
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494 | } |
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495 | return ret; |
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496 | } |
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497 | //----------------------------------------------------------------------- |
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498 | void FileStreamDataStream::skip(long count) |
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499 | { |
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500 | #if defined(STLPORT) |
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501 | // Workaround for STLport issues: After reached eof of file stream, |
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502 | // it's seems the stream was putted in intermediate state, and will be |
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503 | // fail if try to repositioning relative to current position. |
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504 | // Note: tellg() fail in this case too. |
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505 | if (mpStream->eof()) |
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506 | { |
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507 | mpStream->clear(); |
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508 | // Use seek relative to either begin or end to bring the stream |
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509 | // back to normal state. |
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510 | mpStream->seekg(0, std::ios::end); |
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511 | } |
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512 | #endif |
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513 | mpStream->clear(); //Clear fail status in case eof was set |
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514 | mpStream->seekg(static_cast<std::ifstream::pos_type>(count), std::ios::cur); |
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515 | } |
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516 | //----------------------------------------------------------------------- |
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517 | void FileStreamDataStream::seek( size_t pos ) |
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518 | { |
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519 | mpStream->clear(); //Clear fail status in case eof was set |
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520 | mpStream->seekg(static_cast<std::streamoff>(pos), std::ios::beg); |
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521 | } |
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522 | //----------------------------------------------------------------------- |
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523 | size_t FileStreamDataStream::tell(void) const |
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524 | { |
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525 | mpStream->clear(); //Clear fail status in case eof was set |
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526 | return mpStream->tellg(); |
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527 | } |
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528 | //----------------------------------------------------------------------- |
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529 | bool FileStreamDataStream::eof(void) const |
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530 | { |
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531 | return mpStream->eof(); |
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532 | } |
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533 | //----------------------------------------------------------------------- |
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534 | void FileStreamDataStream::close(void) |
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535 | { |
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536 | if (mpStream) |
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537 | { |
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538 | mpStream->close(); |
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539 | if (mFreeOnClose) |
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540 | { |
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541 | // delete the stream too |
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542 | delete mpStream; |
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543 | mpStream = 0; |
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544 | } |
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545 | } |
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546 | } |
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547 | //----------------------------------------------------------------------- |
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548 | //----------------------------------------------------------------------- |
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549 | FileHandleDataStream::FileHandleDataStream(FILE* handle) |
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550 | : DataStream(), mFileHandle(handle) |
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551 | { |
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552 | // Determine size |
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553 | fseek(mFileHandle, 0, SEEK_END); |
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554 | mSize = ftell(mFileHandle); |
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555 | fseek(mFileHandle, 0, SEEK_SET); |
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556 | } |
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557 | //----------------------------------------------------------------------- |
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558 | FileHandleDataStream::FileHandleDataStream(const String& name, FILE* handle) |
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559 | : DataStream(name), mFileHandle(handle) |
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560 | { |
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561 | // Determine size |
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562 | fseek(mFileHandle, 0, SEEK_END); |
---|
563 | mSize = ftell(mFileHandle); |
---|
564 | fseek(mFileHandle, 0, SEEK_SET); |
---|
565 | } |
---|
566 | //----------------------------------------------------------------------- |
---|
567 | FileHandleDataStream::~FileHandleDataStream() |
---|
568 | { |
---|
569 | close(); |
---|
570 | } |
---|
571 | //----------------------------------------------------------------------- |
---|
572 | size_t FileHandleDataStream::read(void* buf, size_t count) |
---|
573 | { |
---|
574 | return fread(buf, 1, count, mFileHandle); |
---|
575 | } |
---|
576 | //----------------------------------------------------------------------- |
---|
577 | void FileHandleDataStream::skip(long count) |
---|
578 | { |
---|
579 | fseek(mFileHandle, count, SEEK_CUR); |
---|
580 | } |
---|
581 | //----------------------------------------------------------------------- |
---|
582 | void FileHandleDataStream::seek( size_t pos ) |
---|
583 | { |
---|
584 | fseek(mFileHandle, static_cast<long>(pos), SEEK_SET); |
---|
585 | } |
---|
586 | //----------------------------------------------------------------------- |
---|
587 | size_t FileHandleDataStream::tell(void) const |
---|
588 | { |
---|
589 | return ftell( mFileHandle ); |
---|
590 | } |
---|
591 | //----------------------------------------------------------------------- |
---|
592 | bool FileHandleDataStream::eof(void) const |
---|
593 | { |
---|
594 | return feof(mFileHandle) != 0; |
---|
595 | } |
---|
596 | //----------------------------------------------------------------------- |
---|
597 | void FileHandleDataStream::close(void) |
---|
598 | { |
---|
599 | fclose(mFileHandle); |
---|
600 | mFileHandle = 0; |
---|
601 | } |
---|
602 | //----------------------------------------------------------------------- |
---|
603 | |
---|
604 | } |
---|