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annotate src/misc/blob.hpp @ 10831:31f766ee053b draft

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(svn r15166) -Codechange: reduce number of includes in afterload.cpp
author smatz <smatz@openttd.org>
date Tue, 20 Jan 2009 13:56:35 +0000
parents 592ae9307430
children 02313cc6114e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* $Id$ */
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2
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3 /** @file blob.hpp Support for storing random binary data. */
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4
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5 #ifndef BLOB_HPP
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6 #define BLOB_HPP
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7
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8 #include "../core/alloc_func.hpp"
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9 #include "../core/mem_func.hpp"
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10
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11 /** Base class for simple binary blobs.
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12 * Item is byte.
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13 * The word 'simple' means:
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14 * - no configurable allocator type (always made from heap)
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15 * - no smart deallocation - deallocation must be called from the same
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16 * module (DLL) where the blob was allocated
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17 * - no configurable allocation policy (how big blocks should be allocated)
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18 * - no extra ownership policy (i.e. 'copy on write') when blob is copied
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19 * - no thread synchronization at all
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20 *
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21 * Internal member layout:
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22 * 1. The only class member is pointer to the first item (see union ptr_u).
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23 * 2. Allocated block contains the blob header (see CHdr) followed by the raw byte data.
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24 * Always, when it allocates memory the allocated size is:
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25 * sizeof(CHdr) + <data capacity>
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26 * 3. Two 'virtual' members (m_size and m_max_size) are stored in the CHdr at beginning
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27 * of the alloated block.
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28 * 4. The pointter (in ptr_u) pobsize_ts behind the header (to the first data byte).
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29 * When memory block is allocated, the sizeof(CHdr) it added to it.
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30 * 5. Benefits of this layout:
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31 * - items are accessed in the simplest possible way - just dereferencing the pointer,
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32 * which is good for performance (assuming that data are accessed most often).
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33 * - sizeof(blob) is the same as the size of any other pointer
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34 * 6. Drawbacks of this layout:
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35 * - the fact, that pointer to the alocated block is adjusted by sizeof(CHdr) before
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36 * it is stored can lead to several confusions:
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37 * - it is not common pattern so the implementation code is bit harder to read
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38 * - valgrind can generate warning that allocated block is lost (not accessible)
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39 * */
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40 class CBlobBaseSimple {
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41 public:
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42 typedef ::ptrdiff_t bsize_t;
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43 typedef ::byte bitem_t;
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45 protected:
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46 /** header of the allocated memory block */
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47 struct CHdr {
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48 bsize_t m_size; ///< actual blob size in bytes
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49 bsize_t m_max_size; ///< maximum (allocated) size in bytes
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50 };
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51
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52 /** type used as class member */
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53 union {
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54 bitem_t *m_pData; ///< ptr to the first byte of data
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55 #if defined(HAS_WCHAR)
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56 wchar_t *m_pwData; ///< ptr to the first byte of data
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57 #endif /* HAS_WCHAR */
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58 CHdr *m_pHdr_1; ///< ptr just after the CHdr holding m_size and m_max_size
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59 } ptr_u;
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60
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61 public:
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62 static const bsize_t Ttail_reserve = 4; ///< four extra bytes will be always allocated and zeroed at the end
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63
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64 /** default constructor - initializes empty blob */
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65 FORCEINLINE CBlobBaseSimple() { InitEmpty(); }
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66 /** constructor - create blob with data */
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67 FORCEINLINE CBlobBaseSimple(const bitem_t *p, bsize_t num_bytes)
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68 {
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69 InitEmpty();
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70 AppendRaw(p, num_bytes);
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71 }
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72
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73 /** copy constructor */
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74 FORCEINLINE CBlobBaseSimple(const CBlobBaseSimple& src)
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75 {
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76 InitEmpty();
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77 AppendRaw(src);
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78 }
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79
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80 /** move constructor - take ownership of blob data */
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81 FORCEINLINE CBlobBaseSimple(CHdr * const & pHdr_1)
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82 {
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83 assert(pHdr_1 != NULL);
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84 ptr_u.m_pHdr_1 = pHdr_1;
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85 *(CHdr**)&pHdr_1 = NULL;
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86 }
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87
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88 /** destructor */
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89 FORCEINLINE ~CBlobBaseSimple()
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90 {
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91 Free();
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92 }
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93
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94 protected:
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95 /** initialize the empty blob by setting the ptr_u.m_pHdr_1 pointer to the static CHdr with
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96 * both m_size and m_max_size containing zero */
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97 FORCEINLINE void InitEmpty()
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98 {
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99 static CHdr hdrEmpty[] = {{0, 0}, {0, 0}};
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100 ptr_u.m_pHdr_1 = &hdrEmpty[1];
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101 }
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102
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103 /** initialize blob by attaching it to the given header followed by data */
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104 FORCEINLINE void Init(CHdr *hdr)
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105 {
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106 ptr_u.m_pHdr_1 = &hdr[1];
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107 }
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108
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109 /** blob header accessor - use it rather than using the pointer arithmetics directly - non-const version */
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110 FORCEINLINE CHdr& Hdr()
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111 {
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112 return ptr_u.m_pHdr_1[-1];
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113 }
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114
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115 /** blob header accessor - use it rather than using the pointer arithmetics directly - const version */
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116 FORCEINLINE const CHdr& Hdr() const
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117 {
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118 return ptr_u.m_pHdr_1[-1];
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119 }
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120
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121 /** return reference to the actual blob size - used when the size needs to be modified */
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122 FORCEINLINE bsize_t& RawSizeRef()
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123 {
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124 return Hdr().m_size;
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125 };
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126
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127 public:
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128 /** return true if blob doesn't contain valid data */
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129 FORCEINLINE bool IsEmpty() const
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130 {
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131 return RawSize() == 0;
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132 }
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133
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134 /** return the number of valid data bytes in the blob */
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135 FORCEINLINE bsize_t RawSize() const
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136 {
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137 return Hdr().m_size;
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138 };
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139
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140 /** return the current blob capacity in bytes */
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141 FORCEINLINE bsize_t MaxRawSize() const
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142 {
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143 return Hdr().m_max_size;
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144 };
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145
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146 /** return pointer to the first byte of data - non-const version */
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147 FORCEINLINE bitem_t *RawData()
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148 {
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149 return ptr_u.m_pData;
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150 }
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151
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152 /** return pointer to the first byte of data - const version */
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153 FORCEINLINE const bitem_t *RawData() const
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154 {
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155 return ptr_u.m_pData;
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156 }
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157
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158 /** return the 32 bit CRC of valid data in the blob */
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159 //FORCEINLINE bsize_t Crc32() const
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160 //{
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161 // return CCrc32::Calc(RawData(), RawSize());
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162 //}
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163
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164 /** invalidate blob's data - doesn't free buffer */
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165 FORCEINLINE void Clear()
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166 {
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167 RawSizeRef() = 0;
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168 }
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169
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170 /** free the blob's memory */
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171 FORCEINLINE void Free()
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172 {
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173 if (MaxRawSize() > 0) {
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174 RawFree(&Hdr());
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175 InitEmpty();
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176 }
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177 }
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178
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179 /** copy data from another blob - replaces any existing blob's data */
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180 FORCEINLINE void CopyFrom(const CBlobBaseSimple& src)
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181 {
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182 Clear();
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183 AppendRaw(src);
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184 }
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185
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186 /** overtake ownership of data buffer from the source blob - source blob will become empty */
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187 FORCEINLINE void MoveFrom(CBlobBaseSimple& src)
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188 {
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189 Free();
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190 ptr_u.m_pData = src.ptr_u.m_pData;
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191 src.InitEmpty();
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192 }
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193
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194 /** swap buffers (with data) between two blobs (this and source blob) */
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195 FORCEINLINE void Swap(CBlobBaseSimple& src)
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196 {
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197 bitem_t *tmp = ptr_u.m_pData; ptr_u.m_pData = src.ptr_u.m_pData;
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198 src.ptr_u.m_pData = tmp;
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199 }
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200
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201 /** append new bytes at the end of existing data bytes - reallocates if necessary */
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202 FORCEINLINE void AppendRaw(const void *p, bsize_t num_bytes)
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203 {
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diff changeset
204 assert(p != NULL);
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diff changeset
205 if (num_bytes > 0) {
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parents:
diff changeset
206 memcpy(GrowRawSize(num_bytes), p, num_bytes);
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KUDr <KUDr@openttd.org>
parents:
diff changeset
207 } else {
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diff changeset
208 assert(num_bytes >= 0);
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diff changeset
209 }
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parents:
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210 }
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diff changeset
211
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212 /** append bytes from given source blob to the end of existing data bytes - reallocates if necessary */
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KUDr <KUDr@openttd.org>
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diff changeset
213 FORCEINLINE void AppendRaw(const CBlobBaseSimple& src)
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214 {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
215 if (!src.IsEmpty())
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KUDr <KUDr@openttd.org>
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diff changeset
216 memcpy(GrowRawSize(src.RawSize()), src.RawData(), src.RawSize());
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217 }
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218
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diff changeset
219 /** Reallocate if there is no free space for num_bytes bytes.
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220 * @return pointer to the new data to be added */
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221 FORCEINLINE bitem_t *MakeRawFreeSpace(bsize_t num_bytes)
5633
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222 {
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223 assert(num_bytes >= 0);
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224 bsize_t new_size = RawSize() + num_bytes;
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225 if (new_size > MaxRawSize()) SmartAlloc(new_size);
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226 return ptr_u.m_pData + RawSize();
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227 }
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228
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diff changeset
229 /** Increase RawSize() by num_bytes.
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230 * @return pointer to the new data added */
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diff changeset
231 FORCEINLINE bitem_t *GrowRawSize(bsize_t num_bytes)
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diff changeset
232 {
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233 bitem_t *pNewData = MakeRawFreeSpace(num_bytes);
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diff changeset
234 RawSizeRef() += num_bytes;
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diff changeset
235 return pNewData;
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236 }
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237
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diff changeset
238 /** Decrease RawSize() by num_bytes. */
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diff changeset
239 FORCEINLINE void ReduceRawSize(bsize_t num_bytes)
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240 {
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KUDr <KUDr@openttd.org>
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diff changeset
241 if (MaxRawSize() > 0 && num_bytes > 0) {
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KUDr <KUDr@openttd.org>
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diff changeset
242 assert(num_bytes <= RawSize());
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KUDr <KUDr@openttd.org>
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diff changeset
243 if (num_bytes < RawSize()) RawSizeRef() -= num_bytes;
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KUDr <KUDr@openttd.org>
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244 else RawSizeRef() = 0;
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245 }
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246 }
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diff changeset
247
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248 /** reallocate blob data if needed */
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diff changeset
249 void SmartAlloc(bsize_t new_size)
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diff changeset
250 {
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diff changeset
251 bsize_t old_max_size = MaxRawSize();
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diff changeset
252 if (old_max_size >= new_size) return;
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KUDr <KUDr@openttd.org>
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diff changeset
253 // calculate minimum block size we need to allocate
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254 bsize_t min_alloc_size = sizeof(CHdr) + new_size + Ttail_reserve;
5633
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diff changeset
255 // ask allocation policy for some reasonable block size
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diff changeset
256 bsize_t alloc_size = AllocPolicy(min_alloc_size);
5633
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diff changeset
257 // allocate new block
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diff changeset
258 CHdr *pNewHdr = RawAlloc(alloc_size);
5633
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KUDr <KUDr@openttd.org>
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diff changeset
259 // setup header
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260 pNewHdr->m_size = RawSize();
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diff changeset
261 pNewHdr->m_max_size = alloc_size - (sizeof(CHdr) + Ttail_reserve);
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diff changeset
262 // copy existing data
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KUDr <KUDr@openttd.org>
parents:
diff changeset
263 if (RawSize() > 0)
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KUDr <KUDr@openttd.org>
parents:
diff changeset
264 memcpy(pNewHdr + 1, ptr_u.m_pData, pNewHdr->m_size);
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
265 // replace our block with new one
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rubidium <rubidium@openttd.org>
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diff changeset
266 CHdr *pOldHdr = &Hdr();
5633
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KUDr <KUDr@openttd.org>
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diff changeset
267 Init(pNewHdr);
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KUDr <KUDr@openttd.org>
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diff changeset
268 if (old_max_size > 0)
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KUDr <KUDr@openttd.org>
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diff changeset
269 RawFree(pOldHdr);
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diff changeset
270 }
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diff changeset
271
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diff changeset
272 /** simple allocation policy - can be optimized later */
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diff changeset
273 FORCEINLINE static bsize_t AllocPolicy(bsize_t min_alloc)
5633
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diff changeset
274 {
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diff changeset
275 if (min_alloc < (1 << 9)) {
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KUDr <KUDr@openttd.org>
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diff changeset
276 if (min_alloc < (1 << 5)) return (1 << 5);
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diff changeset
277 return (min_alloc < (1 << 7)) ? (1 << 7) : (1 << 9);
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278 }
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parents:
diff changeset
279 if (min_alloc < (1 << 15)) {
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KUDr <KUDr@openttd.org>
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diff changeset
280 if (min_alloc < (1 << 11)) return (1 << 11);
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diff changeset
281 return (min_alloc < (1 << 13)) ? (1 << 13) : (1 << 15);
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282 }
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KUDr <KUDr@openttd.org>
parents:
diff changeset
283 if (min_alloc < (1 << 20)) {
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KUDr <KUDr@openttd.org>
parents:
diff changeset
284 if (min_alloc < (1 << 17)) return (1 << 17);
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diff changeset
285 return (min_alloc < (1 << 19)) ? (1 << 19) : (1 << 20);
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KUDr <KUDr@openttd.org>
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diff changeset
286 }
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diff changeset
287 min_alloc = (min_alloc | ((1 << 20) - 1)) + 1;
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KUDr <KUDr@openttd.org>
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diff changeset
288 return min_alloc;
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diff changeset
289 }
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290
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291 /** all allocation should happen here */
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292 static FORCEINLINE CHdr *RawAlloc(bsize_t num_bytes)
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293 {
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294 return (CHdr*)MallocT<byte>(num_bytes);
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295 }
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296
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297 /** all deallocations should happen here */
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298 static FORCEINLINE void RawFree(CHdr *p)
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299 {
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300 free(p);
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301 }
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302 /** fixing the four bytes at the end of blob data - useful when blob is used to hold string */
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303 FORCEINLINE void FixTail() const
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304 {
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305 if (MaxRawSize() > 0) {
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306 bitem_t *p = &ptr_u.m_pData[RawSize()];
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307 for (bsize_t i = 0; i < Ttail_reserve; i++) {
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308 p[i] = 0;
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309 }
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310 }
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311 }
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312 };
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313
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314 /** Blob - simple dynamic Titem_ array. Titem_ (template argument) is a placeholder for any type.
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315 * Titem_ can be any integral type, pointer, or structure. Using Blob instead of just plain C array
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316 * simplifies the resource management in several ways:
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317 * 1. When adding new item(s) it automatically grows capacity if needed.
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318 * 2. When variable of type Blob comes out of scope it automatically frees the data buffer.
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319 * 3. Takes care about the actual data size (number of used items).
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320 * 4. Dynamically constructs only used items (as opposite of static array which constructs all items) */
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321 template <class Titem_, class Tbase_ = CBlobBaseSimple>
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322 class CBlobT : public Tbase_ {
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323 // make template arguments public:
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324 public:
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325 typedef Titem_ Titem;
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326 typedef Tbase_ Tbase;
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327 typedef typename Tbase::bsize_t bsize_t;
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328
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329 static const bsize_t Titem_size = sizeof(Titem);
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330
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331 struct OnTransfer {
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332 typename Tbase_::CHdr *m_pHdr_1;
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333 OnTransfer(const OnTransfer& src) : m_pHdr_1(src.m_pHdr_1) {assert(src.m_pHdr_1 != NULL); *(typename Tbase_::CHdr**)&src.m_pHdr_1 = NULL;}
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334 OnTransfer(CBlobT& src) : m_pHdr_1(src.ptr_u.m_pHdr_1) {src.InitEmpty();}
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335 ~OnTransfer() {assert(m_pHdr_1 == NULL);}
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336 };
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337
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338 /** Default constructor - makes new Blob ready to accept any data */
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339 FORCEINLINE CBlobT()
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340 : Tbase()
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341 {}
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342
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343 /** Constructor - makes new Blob with data */
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344 FORCEINLINE CBlobT(const Titem_ *p, bsize_t num_items)
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345 : Tbase((typename Tbase_::bitem_t*)p, num_items * Titem_size)
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346 {}
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347
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348 /** Copy constructor - make new blob to become copy of the original (source) blob */
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349 FORCEINLINE CBlobT(const Tbase& src)
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350 : Tbase(src)
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351 {
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352 assert((Tbase::RawSize() % Titem_size) == 0);
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353 }
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354
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355 /** Take ownership constructor */
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356 FORCEINLINE CBlobT(const OnTransfer& ot)
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357 : Tbase(ot.m_pHdr_1)
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358 {}
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359
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360 /** Destructor - ensures that allocated memory (if any) is freed */
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361 FORCEINLINE ~CBlobT()
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362 {
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363 Free();
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364 }
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365
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366 /** Check the validity of item index (only in debug mode) */
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367 FORCEINLINE void CheckIdx(bsize_t idx) const
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368 {
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369 assert(idx >= 0); assert(idx < Size());
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370 }
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371
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372 /** Return pointer to the first data item - non-const version */
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373 FORCEINLINE Titem *Data()
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374 {
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375 return (Titem*)Tbase::RawData();
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376 }
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377
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378 /** Return pointer to the first data item - const version */
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379 FORCEINLINE const Titem *Data() const
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380 {
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381 return (const Titem*)Tbase::RawData();
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382 }
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383
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384 /** Return pointer to the idx-th data item - non-const version */
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385 FORCEINLINE Titem *Data(bsize_t idx)
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386 {
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387 CheckIdx(idx);
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388 return (Data() + idx);
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389 }
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390
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a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
391 /** Return pointer to the idx-th data item - const version */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
392 FORCEINLINE const Titem *Data(bsize_t idx) const
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
393 {
9135
bec379423029 (svn r12995) -Codechange: use std::vector for EngineList instead of C/C++ wrapper for CBlobT
smatz <smatz@openttd.org>
parents: 9111
diff changeset
394 CheckIdx(idx);
bec379423029 (svn r12995) -Codechange: use std::vector for EngineList instead of C/C++ wrapper for CBlobT
smatz <smatz@openttd.org>
parents: 9111
diff changeset
395 return (Data() + idx);
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
396 }
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
397
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
398 /** Return number of items in the Blob */
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
399 FORCEINLINE bsize_t Size() const
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
400 {
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
401 return (Tbase::RawSize() / Titem_size);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
402 }
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
403
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
404 /** Return total number of items that can fit in the Blob without buffer reallocation */
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
405 FORCEINLINE bsize_t MaxSize() const
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
406 {
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
407 return (Tbase::MaxRawSize() / Titem_size);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
408 }
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
409 /** Return number of additional items that can fit in the Blob without buffer reallocation */
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
410 FORCEINLINE bsize_t GetReserve() const
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
411 {
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
412 return ((Tbase::MaxRawSize() - Tbase::RawSize()) / Titem_size);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
413 }
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
414
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
415 /** Free the memory occupied by Blob destroying all items */
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
416 FORCEINLINE void Free()
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
417 {
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
418 assert((Tbase::RawSize() % Titem_size) == 0);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
419 bsize_t old_size = Size();
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
420 if (old_size > 0) {
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
421 // destroy removed items;
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
422 Titem *pI_last_to_destroy = Data(0);
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
423 for (Titem *pI = Data(old_size - 1); pI >= pI_last_to_destroy; pI--) pI->~Titem_();
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
424 }
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
425 Tbase::Free();
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
426 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
427
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
428 /** Grow number of data items in Blob by given number - doesn't construct items */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
429 FORCEINLINE Titem *GrowSizeNC(bsize_t num_items)
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
430 {
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
431 return (Titem*)Tbase::GrowRawSize(num_items * Titem_size);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
432 }
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
433
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
434 /** Grow number of data items in Blob by given number - constructs new items (using Titem_'s default constructor) */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
435 FORCEINLINE Titem *GrowSizeC(bsize_t num_items)
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
436 {
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
437 Titem *pI = GrowSizeNC(num_items);
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
438 for (bsize_t i = num_items; i > 0; i--, pI++) new (pI) Titem();
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
439 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
440
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
441 /** Destroy given number of items and reduce the Blob's data size */
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
442 FORCEINLINE void ReduceSize(bsize_t num_items)
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
443 {
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
444 assert((Tbase::RawSize() % Titem_size) == 0);
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
445 bsize_t old_size = Size();
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
446 assert(num_items <= old_size);
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
447 bsize_t new_size = (num_items <= old_size) ? (old_size - num_items) : 0;
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
448 // destroy removed items;
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
449 Titem *pI_last_to_destroy = Data(new_size);
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
450 for (Titem *pI = Data(old_size - 1); pI >= pI_last_to_destroy; pI--) pI->~Titem();
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
451 // remove them
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
452 Tbase::ReduceRawSize(num_items * Titem_size);
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
453 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
454
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
455 /** Append one data item at the end (calls Titem_'s default constructor) */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
456 FORCEINLINE Titem *AppendNew()
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
457 {
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
458 Titem& dst = *GrowSizeNC(1); // Grow size by one item
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
459 Titem *pNewItem = new (&dst) Titem(); // construct the new item by calling in-place new operator
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
460 return pNewItem;
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
461 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
462
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
463 /** Append the copy of given item at the end of Blob (using copy constructor) */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
464 FORCEINLINE Titem *Append(const Titem& src)
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
465 {
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
466 Titem& dst = *GrowSizeNC(1); // Grow size by one item
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
467 Titem *pNewItem = new (&dst) Titem(src); // construct the new item by calling in-place new operator with copy ctor()
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
468 return pNewItem;
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
469 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
470
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
471 /** Add given items (ptr + number of items) at the end of blob */
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
472 FORCEINLINE Titem *Append(const Titem *pSrc, bsize_t num_items)
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
473 {
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
474 Titem *pDst = GrowSizeNC(num_items);
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
475 Titem *pDstOrg = pDst;
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
476 Titem *pDstEnd = pDst + num_items;
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
477 while (pDst < pDstEnd) new (pDst++) Titem(*(pSrc++));
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
478 return pDstOrg;
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
479 }
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
480
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
481 /** Remove item with the given index by replacing it by the last item and reducing the size by one */
7115
0fe66343663e (svn r10388) -Cleanup: coding style (CBlobT & CBlobBaseSimple), removed CStrA
KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
482 FORCEINLINE void RemoveBySwap(bsize_t idx)
5633
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
483 {
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
484 CheckIdx(idx);
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
parents:
diff changeset
485 // destroy removed item
10647
592ae9307430 (svn r14949) -Cleanup: pointer coding style
rubidium <rubidium@openttd.org>
parents: 9520
diff changeset
486 Titem *pRemoved = Data(idx);
5633
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KUDr <KUDr@openttd.org>
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487 RemoveBySwap(pRemoved);
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KUDr <KUDr@openttd.org>
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488 }
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489
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KUDr <KUDr@openttd.org>
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490 /** Remove item given by pointer replacing it by the last item and reducing the size by one */
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rubidium <rubidium@openttd.org>
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491 FORCEINLINE void RemoveBySwap(Titem *pItem)
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KUDr <KUDr@openttd.org>
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492 {
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493 Titem *pLast = Data(Size() - 1);
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KUDr <KUDr@openttd.org>
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494 assert(pItem >= Data() && pItem <= pLast);
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KUDr <KUDr@openttd.org>
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495 // move last item to its new place
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KUDr <KUDr@openttd.org>
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496 if (pItem != pLast) {
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KUDr <KUDr@openttd.org>
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497 pItem->~Titem_();
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KUDr <KUDr@openttd.org>
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498 new (pItem) Titem_(*pLast);
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KUDr <KUDr@openttd.org>
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499 }
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KUDr <KUDr@openttd.org>
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500 // destroy the last item
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KUDr <KUDr@openttd.org>
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diff changeset
501 pLast->~Titem_();
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KUDr <KUDr@openttd.org>
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502 // and reduce the raw blob size
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KUDr <KUDr@openttd.org>
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503 Tbase::ReduceRawSize(Titem_size);
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KUDr <KUDr@openttd.org>
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504 }
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parents: 6481
diff changeset
505
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506 /** Ensures that given number of items can be added to the end of Blob. Returns pointer to the
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KUDr <KUDr@openttd.org>
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507 * first free (unused) item */
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rubidium <rubidium@openttd.org>
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508 FORCEINLINE Titem *MakeFreeSpace(bsize_t num_items)
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KUDr <KUDr@openttd.org>
parents: 6481
diff changeset
509 {
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KUDr <KUDr@openttd.org>
parents: 6481
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510 return (Titem*)Tbase::MakeRawFreeSpace(num_items * Titem_size);
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KUDr <KUDr@openttd.org>
parents: 6481
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511 }
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parents: 6481
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512
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KUDr <KUDr@openttd.org>
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513 FORCEINLINE OnTransfer Transfer()
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KUDr <KUDr@openttd.org>
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diff changeset
514 {
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KUDr <KUDr@openttd.org>
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515 return OnTransfer(*this);
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KUDr <KUDr@openttd.org>
parents: 6481
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516 };
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KUDr <KUDr@openttd.org>
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517 };
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KUDr <KUDr@openttd.org>
parents:
diff changeset
518
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KUDr <KUDr@openttd.org>
parents:
diff changeset
519
a9c31d5be476 (svn r8092) -Codechange: header files with miscellaneous template classes (smart pointers, blob, array, hashtable, etc.) moved from src/yapf to src/misc as they can now be used anywhere.
KUDr <KUDr@openttd.org>
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diff changeset
520 #endif /* BLOB_HPP */