Wed, 27 Jan 2021 12:34:26 +0200
remove the packet queue for now
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1 | /* |
109 | 2 | Copyright 2014 - 2016 Teemu Piippo |
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3 | All rights reserved. |
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4 | |
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5 | Redistribution and use in source and binary forms, with or without |
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6 | modification, are permitted provided that the following conditions |
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7 | are met: |
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8 | |
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9 | 1. Redistributions of source code must retain the above copyright |
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10 | notice, this list of conditions and the following disclaimer. |
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11 | 2. Redistributions in binary form must reproduce the above copyright |
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12 | notice, this list of conditions and the following disclaimer in the |
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13 | documentation and/or other materials provided with the distribution. |
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14 | 3. Neither the name of the copyright holder nor the names of its |
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15 | contributors may be used to endorse or promote products derived from |
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16 | this software without specific prior written permission. |
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17 | |
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18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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19 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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20 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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21 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER |
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22 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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23 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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24 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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25 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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26 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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27 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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28 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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30 | |
5 | 31 | #include "bytestream.h" |
32 | #include <string.h> | |
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33 | BEGIN_ZFC_NAMESPACE |
5 | 34 | |
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35 | /*! |
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36 | * \brief Constructs a byte cursor. The cursor is placed to the beginning of the stream. |
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37 | * \param data |
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38 | */ |
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39 | Bytestream::Bytestream(ByteArray& data) : |
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40 | m_data(data), |
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41 | m_position(0) {} |
11 | 42 | |
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43 | /*! |
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44 | * \brief Ensures that the specified amount of bytes can be read. Raises IOError if this is not the case. |
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45 | * \param bytes Amount of bytes to check. |
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46 | */ |
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47 | void Bytestream::ensureReadSpace(int bytes) |
5 | 48 | { |
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49 | if (bytesLeft() < bytes) |
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50 | { |
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51 | int bytesPast = bytes - bytesLeft(); |
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52 | String message; |
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53 | message.sprintf("attempted to read %d byte%s past the end of bytestream", bytesPast, plural(bytesPast)); |
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54 | throw IOError (message); |
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55 | } |
5 | 56 | } |
57 | ||
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58 | /*! |
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59 | * \returns the amount of bytes remaining for reading. |
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60 | */ |
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61 | int Bytestream::bytesLeft() const |
5 | 62 | { |
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63 | return m_data.size() - m_position; |
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64 | } |
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65 | |
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66 | /*! |
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67 | * \returns an iterator to the current data position. |
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68 | */ |
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69 | ByteArray::Iterator Bytestream::getCurrentIterator() |
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70 | { |
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71 | return m_data.begin() + m_position; |
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72 | } |
5 | 73 | |
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74 | /*! |
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75 | * \brief Reads in a byte. |
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76 | * \returns the read byte. |
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77 | */ |
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78 | int8_t Bytestream::readByte() |
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79 | { |
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80 | ensureReadSpace(1); |
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81 | return read(); |
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82 | } |
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83 | |
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84 | /*! |
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85 | * \brief Reads in two bytes to form an integer value. |
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86 | * \returns the read value. |
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87 | */ |
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88 | int16_t Bytestream::readShort() |
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89 | { |
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90 | ensureReadSpace (2); |
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91 | int16_t result = 0; |
5 | 92 | |
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93 | for (int i : range(2)) |
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94 | result |= read() << (i * 8); |
5 | 95 | |
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96 | return result; |
5 | 97 | } |
98 | ||
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99 | /*! |
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100 | * \brief Reads in four bytes to form an integer value. |
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101 | * \returns the read value. |
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102 | */ |
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103 | int32_t Bytestream::readLong() |
5 | 104 | { |
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105 | ensureReadSpace (4); |
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106 | int32_t result = 0; |
5 | 107 | |
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108 | for (int i : range(4)) |
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109 | result |= read() << (i * 8); |
5 | 110 | |
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111 | return result; |
5 | 112 | } |
113 | ||
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114 | /*! |
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115 | * \brief Reads in four bytes to form a floating point number. |
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116 | * \returns the read value. |
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117 | */ |
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118 | float Bytestream::readFloat() |
5 | 119 | { |
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120 | float value; |
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121 | int intvalue = readLong(); |
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122 | memcpy(&value, &intvalue, sizeof intvalue); |
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123 | return value; |
5 | 124 | } |
125 | ||
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126 | /*! |
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127 | * \brief Reads in characters until a null terminator is encountered. |
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128 | * \returns the read string. |
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129 | */ |
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130 | String Bytestream::readString() |
5 | 131 | { |
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132 | String result; |
5 | 133 | |
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134 | for (char byte; (byte = readByte()) != '\0';) |
5 | 135 | { |
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136 | if (result.length() < MAX_NETWORK_STRING) |
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137 | result += byte; |
5 | 138 | } |
139 | ||
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140 | return result; |
5 | 141 | } |
142 | ||
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143 | /*! |
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144 | * \brief Reads in a buffer of the specified length. |
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145 | * \param length Amount of bytes to read. |
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146 | * \returns the read buffer. |
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147 | */ |
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148 | ByteArray Bytestream::readBuffer(int length) |
5 | 149 | { |
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150 | ensureReadSpace(length); |
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151 | ByteArray result(length); |
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152 | memcpy(result.data(), m_data.data() + m_position, length); |
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153 | m_position += length; |
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154 | return result; |
5 | 155 | } |
156 | ||
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157 | /*! |
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158 | * \brief Writes an integer to the end of the data as one byte. |
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159 | * \param value Value to write |
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160 | */ |
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161 | void Bytestream::writeByte(int8_t value) |
5 | 162 | { |
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163 | m_data.append(value); |
5 | 164 | } |
165 | ||
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166 | /*! |
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167 | * \brief Writes an integer to the end of the data as 2 bytes. |
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168 | * \param value Value to write |
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169 | */ |
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170 | void Bytestream::writeShort(int16_t value) |
5 | 171 | { |
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172 | for (int i : range(2)) |
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173 | m_data.append((value >> (i * 8)) & 0xFF); |
5 | 174 | } |
175 | ||
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176 | /*! |
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177 | * \brief Writes an integer to the end of the data as 4 bytes. |
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178 | * \param value Value to write |
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179 | */ |
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180 | void Bytestream::writeLong(int32_t value) |
5 | 181 | { |
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182 | for (int i : range(4)) |
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183 | m_data.append((value >> (i * 8)) & 0xFF); |
5 | 184 | } |
185 | ||
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186 | /*! |
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187 | * \brief Writes a floating-point number to the end of the data. |
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188 | * \param value Value to write. |
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189 | */ |
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190 | void Bytestream::writeFloat(float value) |
5 | 191 | { |
192 | // I know this is probably dangerous but this is what Zandronum does so yeah | |
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193 | int intvalue; |
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194 | memcpy (&intvalue, &value, sizeof value); |
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195 | writeLong (intvalue); |
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196 | } |
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197 | |
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198 | /*! |
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199 | * \brief Writes the given string to the end of the data. |
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200 | * \param text String to write. |
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201 | */ |
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202 | void Bytestream::writeString(const String& string) |
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203 | { |
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204 | m_data.append(string.toBytes(), string.length()); |
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205 | m_data.append(0); |
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206 | } |
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207 | |
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208 | /*! |
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209 | * \returns the current position the stream cursor in the data. |
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210 | */ |
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211 | int Bytestream::position() const |
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212 | { |
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213 | return m_position; |
5 | 214 | } |
215 | ||
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216 | /*! |
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217 | * \brief Seeks the stream cursor to the beginning of the data. |
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218 | */ |
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219 | void Bytestream::rewind() |
5 | 220 | { |
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221 | m_position = 0; |
5 | 222 | } |
223 | ||
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224 | /*! |
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225 | * \brief Seeks the stream cursor to a custom location. |
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226 | * \param position Position to seek too. |
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227 | */ |
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228 | void Bytestream::seek(int position) |
5 | 229 | { |
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230 | m_position = position; |
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231 | } |
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232 | |
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233 | /*! |
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234 | * \brief Reads a byte and advances the cursor. No safety checks are done. |
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235 | * \returns the read byte. |
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236 | */ |
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237 | int8_t Bytestream::read() |
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Bytestream now behaves more like a cursor. It does not store the data anymore, rather it leaves the user to specify a vector to use for storage.
Teemu Piippo <teemu@compsta2.com>
parents:
137
diff
changeset
|
238 | { |
42bb29924218
Bytestream now behaves more like a cursor. It does not store the data anymore, rather it leaves the user to specify a vector to use for storage.
Teemu Piippo <teemu@compsta2.com>
parents:
137
diff
changeset
|
239 | return m_data[m_position++]; |
5 | 240 | } |
88
08ccaf26cffd
Now works with MSVC 2010/pdcurses-win32a
Teemu Piippo <tsapii@utu.fi>
parents:
83
diff
changeset
|
241 | |
08ccaf26cffd
Now works with MSVC 2010/pdcurses-win32a
Teemu Piippo <tsapii@utu.fi>
parents:
83
diff
changeset
|
242 | END_ZFC_NAMESPACE |