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3918 | Serge | 1 | /***************************************************************************/ |
2 | /* */ |
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3 | /* ftmemory.h */ |
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4 | /* */ |
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5 | /* The FreeType memory management macros (specification). */ |
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6 | /* */ |
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7 | /* Copyright 1996-2002, 2004-2007, 2010, 2013 by */ |
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8 | /* David Turner, Robert Wilhelm, and Werner Lemberg */ |
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9 | /* */ |
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10 | /* This file is part of the FreeType project, and may only be used, */ |
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11 | /* modified, and distributed under the terms of the FreeType project */ |
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12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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13 | /* this file you indicate that you have read the license and */ |
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14 | /* understand and accept it fully. */ |
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15 | /* */ |
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16 | /***************************************************************************/ |
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17 | |||
18 | |||
19 | #ifndef __FTMEMORY_H__ |
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20 | #define __FTMEMORY_H__ |
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21 | |||
22 | |||
23 | #include |
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24 | #include FT_CONFIG_CONFIG_H |
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25 | #include FT_TYPES_H |
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26 | |||
27 | |||
28 | FT_BEGIN_HEADER |
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29 | |||
30 | |||
31 | /*************************************************************************/ |
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32 | /* */ |
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33 | /* |
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34 | /* FT_SET_ERROR */ |
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35 | /* */ |
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36 | /* |
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37 | /* This macro is used to set an implicit `error' variable to a given */ |
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38 | /* expression's value (usually a function call), and convert it to a */ |
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39 | /* boolean which is set whenever the value is != 0. */ |
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40 | /* */ |
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41 | #undef FT_SET_ERROR |
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42 | #define FT_SET_ERROR( expression ) \ |
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43 | ( ( error = (expression) ) != 0 ) |
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44 | |||
45 | |||
46 | |||
47 | /*************************************************************************/ |
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48 | /*************************************************************************/ |
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49 | /*************************************************************************/ |
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50 | /**** ****/ |
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51 | /**** ****/ |
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52 | /**** M E M O R Y ****/ |
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53 | /**** ****/ |
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54 | /**** ****/ |
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55 | /*************************************************************************/ |
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56 | /*************************************************************************/ |
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57 | /*************************************************************************/ |
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58 | |||
59 | |||
60 | /* |
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61 | * C++ refuses to handle statements like p = (void*)anything, with `p' a |
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62 | * typed pointer. Since we don't have a `typeof' operator in standard |
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63 | * C++, we have to use a template to emulate it. |
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64 | */ |
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65 | |||
66 | #ifdef __cplusplus |
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67 | |||
68 | extern "C++" |
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69 | template |
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70 | cplusplus_typeof( T*, |
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71 | void *v ) |
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72 | { |
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73 | return static_cast |
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74 | } |
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75 | |||
76 | #define FT_ASSIGNP( p, val ) (p) = cplusplus_typeof( (p), (val) ) |
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77 | |||
78 | #else |
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79 | |||
80 | #define FT_ASSIGNP( p, val ) (p) = (val) |
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81 | |||
82 | #endif |
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83 | |||
84 | |||
85 | |||
86 | #ifdef FT_DEBUG_MEMORY |
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87 | |||
88 | FT_BASE( const char* ) _ft_debug_file; |
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89 | FT_BASE( long ) _ft_debug_lineno; |
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90 | |||
91 | #define FT_DEBUG_INNER( exp ) ( _ft_debug_file = __FILE__, \ |
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92 | _ft_debug_lineno = __LINE__, \ |
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93 | (exp) ) |
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94 | |||
95 | #define FT_ASSIGNP_INNER( p, exp ) ( _ft_debug_file = __FILE__, \ |
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96 | _ft_debug_lineno = __LINE__, \ |
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97 | FT_ASSIGNP( p, exp ) ) |
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98 | |||
99 | #else /* !FT_DEBUG_MEMORY */ |
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100 | |||
101 | #define FT_DEBUG_INNER( exp ) (exp) |
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102 | #define FT_ASSIGNP_INNER( p, exp ) FT_ASSIGNP( p, exp ) |
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103 | |||
104 | #endif /* !FT_DEBUG_MEMORY */ |
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105 | |||
106 | |||
107 | /* |
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108 | * The allocation functions return a pointer, and the error code |
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109 | * is written to through the `p_error' parameter. See below for |
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110 | * for documentation. |
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111 | */ |
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112 | |||
113 | FT_BASE( FT_Pointer ) |
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114 | ft_mem_alloc( FT_Memory memory, |
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115 | FT_Long size, |
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116 | FT_Error *p_error ); |
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117 | |||
118 | FT_BASE( FT_Pointer ) |
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119 | ft_mem_qalloc( FT_Memory memory, |
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120 | FT_Long size, |
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121 | FT_Error *p_error ); |
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122 | |||
123 | FT_BASE( FT_Pointer ) |
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124 | ft_mem_realloc( FT_Memory memory, |
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125 | FT_Long item_size, |
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126 | FT_Long cur_count, |
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127 | FT_Long new_count, |
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128 | void* block, |
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129 | FT_Error *p_error ); |
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130 | |||
131 | FT_BASE( FT_Pointer ) |
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132 | ft_mem_qrealloc( FT_Memory memory, |
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133 | FT_Long item_size, |
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134 | FT_Long cur_count, |
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135 | FT_Long new_count, |
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136 | void* block, |
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137 | FT_Error *p_error ); |
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138 | |||
139 | FT_BASE( void ) |
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140 | ft_mem_free( FT_Memory memory, |
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141 | const void* P ); |
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142 | |||
143 | |||
144 | #define FT_MEM_ALLOC( ptr, size ) \ |
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145 | FT_ASSIGNP_INNER( ptr, ft_mem_alloc( memory, \ |
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146 | (FT_Long)(size), \ |
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147 | &error ) ) |
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148 | |||
149 | #define FT_MEM_FREE( ptr ) \ |
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150 | FT_BEGIN_STMNT \ |
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151 | ft_mem_free( memory, (ptr) ); \ |
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152 | (ptr) = NULL; \ |
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153 | FT_END_STMNT |
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154 | |||
155 | #define FT_MEM_NEW( ptr ) \ |
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156 | FT_MEM_ALLOC( ptr, sizeof ( *(ptr) ) ) |
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157 | |||
158 | #define FT_MEM_REALLOC( ptr, cursz, newsz ) \ |
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159 | FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \ |
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160 | 1, \ |
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161 | (FT_Long)(cursz), \ |
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162 | (FT_Long)(newsz), \ |
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163 | (ptr), \ |
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164 | &error ) ) |
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165 | |||
166 | #define FT_MEM_QALLOC( ptr, size ) \ |
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167 | FT_ASSIGNP_INNER( ptr, ft_mem_qalloc( memory, \ |
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168 | (FT_Long)(size), \ |
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169 | &error ) ) |
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170 | |||
171 | #define FT_MEM_QNEW( ptr ) \ |
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172 | FT_MEM_QALLOC( ptr, sizeof ( *(ptr) ) ) |
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173 | |||
174 | #define FT_MEM_QREALLOC( ptr, cursz, newsz ) \ |
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175 | FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \ |
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176 | 1, \ |
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177 | (FT_Long)(cursz), \ |
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178 | (FT_Long)(newsz), \ |
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179 | (ptr), \ |
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180 | &error ) ) |
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181 | |||
182 | #define FT_MEM_ALLOC_MULT( ptr, count, item_size ) \ |
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183 | FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \ |
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184 | (FT_Long)(item_size), \ |
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185 | 0, \ |
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186 | (FT_Long)(count), \ |
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187 | NULL, \ |
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188 | &error ) ) |
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189 | |||
190 | #define FT_MEM_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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191 | FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \ |
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192 | (FT_Long)(itmsz), \ |
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193 | (FT_Long)(oldcnt), \ |
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194 | (FT_Long)(newcnt), \ |
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195 | (ptr), \ |
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196 | &error ) ) |
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197 | |||
198 | #define FT_MEM_QALLOC_MULT( ptr, count, item_size ) \ |
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199 | FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \ |
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200 | (FT_Long)(item_size), \ |
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201 | 0, \ |
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202 | (FT_Long)(count), \ |
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203 | NULL, \ |
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204 | &error ) ) |
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205 | |||
206 | #define FT_MEM_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz) \ |
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207 | FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \ |
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208 | (FT_Long)(itmsz), \ |
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209 | (FT_Long)(oldcnt), \ |
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210 | (FT_Long)(newcnt), \ |
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211 | (ptr), \ |
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212 | &error ) ) |
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213 | |||
214 | |||
215 | #define FT_MEM_SET_ERROR( cond ) ( (cond), error != 0 ) |
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216 | |||
217 | |||
218 | #define FT_MEM_SET( dest, byte, count ) ft_memset( dest, byte, count ) |
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219 | |||
220 | #define FT_MEM_COPY( dest, source, count ) ft_memcpy( dest, source, count ) |
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221 | |||
222 | #define FT_MEM_MOVE( dest, source, count ) ft_memmove( dest, source, count ) |
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223 | |||
224 | |||
225 | #define FT_MEM_ZERO( dest, count ) FT_MEM_SET( dest, 0, count ) |
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226 | |||
227 | #define FT_ZERO( p ) FT_MEM_ZERO( p, sizeof ( *(p) ) ) |
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228 | |||
229 | |||
230 | #define FT_ARRAY_ZERO( dest, count ) \ |
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231 | FT_MEM_ZERO( dest, (count) * sizeof ( *(dest) ) ) |
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232 | |||
233 | #define FT_ARRAY_COPY( dest, source, count ) \ |
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234 | FT_MEM_COPY( dest, source, (count) * sizeof ( *(dest) ) ) |
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235 | |||
236 | #define FT_ARRAY_MOVE( dest, source, count ) \ |
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237 | FT_MEM_MOVE( dest, source, (count) * sizeof ( *(dest) ) ) |
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238 | |||
239 | |||
240 | /* |
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241 | * Return the maximum number of addressable elements in an array. |
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242 | * We limit ourselves to INT_MAX, rather than UINT_MAX, to avoid |
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243 | * any problems. |
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244 | */ |
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245 | #define FT_ARRAY_MAX( ptr ) ( FT_INT_MAX / sizeof ( *(ptr) ) ) |
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246 | |||
247 | #define FT_ARRAY_CHECK( ptr, count ) ( (count) <= FT_ARRAY_MAX( ptr ) ) |
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248 | |||
249 | |||
250 | /*************************************************************************/ |
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251 | /* */ |
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252 | /* The following functions macros expect that their pointer argument is */ |
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253 | /* _typed_ in order to automatically compute array element sizes. */ |
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254 | /* */ |
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255 | |||
256 | #define FT_MEM_NEW_ARRAY( ptr, count ) \ |
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257 | FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \ |
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258 | sizeof ( *(ptr) ), \ |
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259 | 0, \ |
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260 | (FT_Long)(count), \ |
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261 | NULL, \ |
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262 | &error ) ) |
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263 | |||
264 | #define FT_MEM_RENEW_ARRAY( ptr, cursz, newsz ) \ |
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265 | FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, \ |
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266 | sizeof ( *(ptr) ), \ |
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267 | (FT_Long)(cursz), \ |
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268 | (FT_Long)(newsz), \ |
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269 | (ptr), \ |
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270 | &error ) ) |
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271 | |||
272 | #define FT_MEM_QNEW_ARRAY( ptr, count ) \ |
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273 | FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \ |
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274 | sizeof ( *(ptr) ), \ |
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275 | 0, \ |
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276 | (FT_Long)(count), \ |
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277 | NULL, \ |
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278 | &error ) ) |
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279 | |||
280 | #define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \ |
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281 | FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, \ |
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282 | sizeof ( *(ptr) ), \ |
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283 | (FT_Long)(cursz), \ |
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284 | (FT_Long)(newsz), \ |
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285 | (ptr), \ |
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286 | &error ) ) |
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287 | |||
288 | #define FT_ALLOC( ptr, size ) \ |
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289 | FT_MEM_SET_ERROR( FT_MEM_ALLOC( ptr, size ) ) |
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290 | |||
291 | #define FT_REALLOC( ptr, cursz, newsz ) \ |
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292 | FT_MEM_SET_ERROR( FT_MEM_REALLOC( ptr, cursz, newsz ) ) |
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293 | |||
294 | #define FT_ALLOC_MULT( ptr, count, item_size ) \ |
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295 | FT_MEM_SET_ERROR( FT_MEM_ALLOC_MULT( ptr, count, item_size ) ) |
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296 | |||
297 | #define FT_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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298 | FT_MEM_SET_ERROR( FT_MEM_REALLOC_MULT( ptr, oldcnt, \ |
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299 | newcnt, itmsz ) ) |
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300 | |||
301 | #define FT_QALLOC( ptr, size ) \ |
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302 | FT_MEM_SET_ERROR( FT_MEM_QALLOC( ptr, size ) ) |
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303 | |||
304 | #define FT_QREALLOC( ptr, cursz, newsz ) \ |
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305 | FT_MEM_SET_ERROR( FT_MEM_QREALLOC( ptr, cursz, newsz ) ) |
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306 | |||
307 | #define FT_QALLOC_MULT( ptr, count, item_size ) \ |
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308 | FT_MEM_SET_ERROR( FT_MEM_QALLOC_MULT( ptr, count, item_size ) ) |
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309 | |||
310 | #define FT_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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311 | FT_MEM_SET_ERROR( FT_MEM_QREALLOC_MULT( ptr, oldcnt, \ |
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312 | newcnt, itmsz ) ) |
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313 | |||
314 | #define FT_FREE( ptr ) FT_MEM_FREE( ptr ) |
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315 | |||
316 | #define FT_NEW( ptr ) FT_MEM_SET_ERROR( FT_MEM_NEW( ptr ) ) |
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317 | |||
318 | #define FT_NEW_ARRAY( ptr, count ) \ |
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319 | FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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320 | |||
321 | #define FT_RENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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322 | FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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323 | |||
324 | #define FT_QNEW( ptr ) \ |
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325 | FT_MEM_SET_ERROR( FT_MEM_QNEW( ptr ) ) |
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326 | |||
327 | #define FT_QNEW_ARRAY( ptr, count ) \ |
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328 | FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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329 | |||
330 | #define FT_QRENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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331 | FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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332 | |||
333 | |||
334 | FT_BASE( FT_Pointer ) |
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335 | ft_mem_strdup( FT_Memory memory, |
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336 | const char* str, |
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337 | FT_Error *p_error ); |
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338 | |||
339 | FT_BASE( FT_Pointer ) |
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340 | ft_mem_dup( FT_Memory memory, |
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341 | const void* address, |
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342 | FT_ULong size, |
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343 | FT_Error *p_error ); |
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344 | |||
345 | |||
346 | #define FT_MEM_STRDUP( dst, str ) \ |
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347 | (dst) = (char*)ft_mem_strdup( memory, (const char*)(str), &error ) |
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348 | |||
349 | #define FT_STRDUP( dst, str ) \ |
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350 | FT_MEM_SET_ERROR( FT_MEM_STRDUP( dst, str ) ) |
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351 | |||
352 | #define FT_MEM_DUP( dst, address, size ) \ |
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353 | (dst) = ft_mem_dup( memory, (address), (FT_ULong)(size), &error ) |
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354 | |||
355 | #define FT_DUP( dst, address, size ) \ |
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356 | FT_MEM_SET_ERROR( FT_MEM_DUP( dst, address, size ) ) |
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357 | |||
358 | |||
359 | /* Return >= 1 if a truncation occurs. */ |
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360 | /* Return 0 if the source string fits the buffer. */ |
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361 | /* This is *not* the same as strlcpy(). */ |
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362 | FT_BASE( FT_Int ) |
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363 | ft_mem_strcpyn( char* dst, |
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364 | const char* src, |
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365 | FT_ULong size ); |
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366 | |||
367 | #define FT_STRCPYN( dst, src, size ) \ |
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368 | ft_mem_strcpyn( (char*)dst, (const char*)(src), (FT_ULong)(size) ) |
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369 | |||
370 | /* */ |
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371 | |||
372 | |||
373 | FT_END_HEADER |
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374 | |||
375 | #endif /* __FTMEMORY_H__ */ |
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376 | |||
377 | |||
378 | /* END */=> |