1 | n/a | /* ----------------------------------------------------------------------- |
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2 | n/a | raw_api.c - Copyright (c) 1999, 2008 Red Hat, Inc. |
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3 | n/a | |
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4 | n/a | Author: Kresten Krab Thorup <krab@gnu.org> |
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5 | n/a | |
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6 | n/a | Permission is hereby granted, free of charge, to any person obtaining |
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7 | n/a | a copy of this software and associated documentation files (the |
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8 | n/a | ``Software''), to deal in the Software without restriction, including |
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9 | n/a | without limitation the rights to use, copy, modify, merge, publish, |
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10 | n/a | distribute, sublicense, and/or sell copies of the Software, and to |
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11 | n/a | permit persons to whom the Software is furnished to do so, subject to |
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12 | n/a | the following conditions: |
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13 | n/a | |
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14 | n/a | The above copyright notice and this permission notice shall be included |
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15 | n/a | in all copies or substantial portions of the Software. |
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16 | n/a | |
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17 | n/a | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, |
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18 | n/a | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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19 | n/a | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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20 | n/a | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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21 | n/a | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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22 | n/a | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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23 | n/a | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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24 | n/a | DEALINGS IN THE SOFTWARE. |
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25 | n/a | ----------------------------------------------------------------------- */ |
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26 | n/a | |
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27 | n/a | /* This file defines generic functions for use with the raw api. */ |
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28 | n/a | |
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29 | n/a | #include <ffi.h> |
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30 | n/a | #include <ffi_common.h> |
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31 | n/a | |
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32 | n/a | #if !FFI_NO_RAW_API |
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33 | n/a | |
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34 | n/a | size_t |
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35 | n/a | ffi_raw_size (ffi_cif *cif) |
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36 | n/a | { |
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37 | n/a | size_t result = 0; |
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38 | n/a | int i; |
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39 | n/a | |
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40 | n/a | ffi_type **at = cif->arg_types; |
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41 | n/a | |
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42 | n/a | for (i = cif->nargs-1; i >= 0; i--, at++) |
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43 | n/a | { |
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44 | n/a | #if !FFI_NO_STRUCTS |
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45 | n/a | if ((*at)->type == FFI_TYPE_STRUCT) |
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46 | n/a | result += ALIGN (sizeof (void*), FFI_SIZEOF_ARG); |
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47 | n/a | else |
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48 | n/a | #endif |
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49 | n/a | result += ALIGN ((*at)->size, FFI_SIZEOF_ARG); |
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50 | n/a | } |
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51 | n/a | |
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52 | n/a | return result; |
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53 | n/a | } |
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54 | n/a | |
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55 | n/a | |
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56 | n/a | void |
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57 | n/a | ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args) |
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58 | n/a | { |
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59 | n/a | unsigned i; |
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60 | n/a | ffi_type **tp = cif->arg_types; |
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61 | n/a | |
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62 | n/a | #if WORDS_BIGENDIAN |
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63 | n/a | |
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64 | n/a | for (i = 0; i < cif->nargs; i++, tp++, args++) |
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65 | n/a | { |
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66 | n/a | switch ((*tp)->type) |
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67 | n/a | { |
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68 | n/a | case FFI_TYPE_UINT8: |
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69 | n/a | case FFI_TYPE_SINT8: |
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70 | n/a | *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 1); |
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71 | n/a | break; |
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72 | n/a | |
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73 | n/a | case FFI_TYPE_UINT16: |
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74 | n/a | case FFI_TYPE_SINT16: |
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75 | n/a | *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 2); |
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76 | n/a | break; |
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77 | n/a | |
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78 | n/a | #if FFI_SIZEOF_ARG >= 4 |
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79 | n/a | case FFI_TYPE_UINT32: |
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80 | n/a | case FFI_TYPE_SINT32: |
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81 | n/a | *args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 4); |
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82 | n/a | break; |
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83 | n/a | #endif |
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84 | n/a | |
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85 | n/a | #if !FFI_NO_STRUCTS |
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86 | n/a | case FFI_TYPE_STRUCT: |
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87 | n/a | *args = (raw++)->ptr; |
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88 | n/a | break; |
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89 | n/a | #endif |
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90 | n/a | |
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91 | n/a | case FFI_TYPE_POINTER: |
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92 | n/a | *args = (void*) &(raw++)->ptr; |
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93 | n/a | break; |
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94 | n/a | |
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95 | n/a | default: |
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96 | n/a | *args = raw; |
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97 | n/a | raw += ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG; |
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98 | n/a | } |
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99 | n/a | } |
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100 | n/a | |
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101 | n/a | #else /* WORDS_BIGENDIAN */ |
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102 | n/a | |
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103 | n/a | #if !PDP |
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104 | n/a | |
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105 | n/a | /* then assume little endian */ |
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106 | n/a | for (i = 0; i < cif->nargs; i++, tp++, args++) |
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107 | n/a | { |
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108 | n/a | #if !FFI_NO_STRUCTS |
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109 | n/a | if ((*tp)->type == FFI_TYPE_STRUCT) |
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110 | n/a | { |
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111 | n/a | *args = (raw++)->ptr; |
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112 | n/a | } |
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113 | n/a | else |
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114 | n/a | #endif |
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115 | n/a | { |
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116 | n/a | *args = (void*) raw; |
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117 | n/a | raw += ALIGN ((*tp)->size, sizeof (void*)) / sizeof (void*); |
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118 | n/a | } |
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119 | n/a | } |
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120 | n/a | |
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121 | n/a | #else |
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122 | n/a | #error "pdp endian not supported" |
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123 | n/a | #endif /* ! PDP */ |
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124 | n/a | |
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125 | n/a | #endif /* WORDS_BIGENDIAN */ |
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126 | n/a | } |
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127 | n/a | |
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128 | n/a | void |
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129 | n/a | ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw) |
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130 | n/a | { |
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131 | n/a | unsigned i; |
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132 | n/a | ffi_type **tp = cif->arg_types; |
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133 | n/a | |
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134 | n/a | for (i = 0; i < cif->nargs; i++, tp++, args++) |
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135 | n/a | { |
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136 | n/a | switch ((*tp)->type) |
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137 | n/a | { |
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138 | n/a | case FFI_TYPE_UINT8: |
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139 | n/a | (raw++)->uint = *(UINT8*) (*args); |
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140 | n/a | break; |
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141 | n/a | |
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142 | n/a | case FFI_TYPE_SINT8: |
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143 | n/a | (raw++)->sint = *(SINT8*) (*args); |
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144 | n/a | break; |
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145 | n/a | |
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146 | n/a | case FFI_TYPE_UINT16: |
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147 | n/a | (raw++)->uint = *(UINT16*) (*args); |
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148 | n/a | break; |
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149 | n/a | |
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150 | n/a | case FFI_TYPE_SINT16: |
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151 | n/a | (raw++)->sint = *(SINT16*) (*args); |
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152 | n/a | break; |
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153 | n/a | |
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154 | n/a | #if FFI_SIZEOF_ARG >= 4 |
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155 | n/a | case FFI_TYPE_UINT32: |
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156 | n/a | (raw++)->uint = *(UINT32*) (*args); |
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157 | n/a | break; |
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158 | n/a | |
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159 | n/a | case FFI_TYPE_SINT32: |
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160 | n/a | (raw++)->sint = *(SINT32*) (*args); |
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161 | n/a | break; |
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162 | n/a | #endif |
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163 | n/a | |
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164 | n/a | #if !FFI_NO_STRUCTS |
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165 | n/a | case FFI_TYPE_STRUCT: |
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166 | n/a | (raw++)->ptr = *args; |
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167 | n/a | break; |
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168 | n/a | #endif |
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169 | n/a | |
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170 | n/a | case FFI_TYPE_POINTER: |
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171 | n/a | (raw++)->ptr = **(void***) args; |
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172 | n/a | break; |
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173 | n/a | |
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174 | n/a | default: |
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175 | n/a | memcpy ((void*) raw->data, (void*)*args, (*tp)->size); |
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176 | n/a | raw += ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG; |
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177 | n/a | } |
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178 | n/a | } |
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179 | n/a | } |
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180 | n/a | |
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181 | n/a | #if !FFI_NATIVE_RAW_API |
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182 | n/a | |
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183 | n/a | |
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184 | n/a | /* This is a generic definition of ffi_raw_call, to be used if the |
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185 | n/a | * native system does not provide a machine-specific implementation. |
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186 | n/a | * Having this, allows code to be written for the raw API, without |
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187 | n/a | * the need for system-specific code to handle input in that format; |
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188 | n/a | * these following couple of functions will handle the translation forth |
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189 | n/a | * and back automatically. */ |
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190 | n/a | |
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191 | n/a | void ffi_raw_call (ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *raw) |
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192 | n/a | { |
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193 | n/a | void **avalue = (void**) alloca (cif->nargs * sizeof (void*)); |
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194 | n/a | ffi_raw_to_ptrarray (cif, raw, avalue); |
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195 | n/a | ffi_call (cif, fn, rvalue, avalue); |
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196 | n/a | } |
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197 | n/a | |
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198 | n/a | #if FFI_CLOSURES /* base system provides closures */ |
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199 | n/a | |
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200 | n/a | static void |
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201 | n/a | ffi_translate_args (ffi_cif *cif, void *rvalue, |
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202 | n/a | void **avalue, void *user_data) |
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203 | n/a | { |
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204 | n/a | ffi_raw *raw = (ffi_raw*)alloca (ffi_raw_size (cif)); |
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205 | n/a | ffi_raw_closure *cl = (ffi_raw_closure*)user_data; |
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206 | n/a | |
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207 | n/a | ffi_ptrarray_to_raw (cif, avalue, raw); |
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208 | n/a | (*cl->fun) (cif, rvalue, raw, cl->user_data); |
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209 | n/a | } |
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210 | n/a | |
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211 | n/a | ffi_status |
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212 | n/a | ffi_prep_raw_closure_loc (ffi_raw_closure* cl, |
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213 | n/a | ffi_cif *cif, |
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214 | n/a | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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215 | n/a | void *user_data, |
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216 | n/a | void *codeloc) |
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217 | n/a | { |
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218 | n/a | ffi_status status; |
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219 | n/a | |
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220 | n/a | status = ffi_prep_closure_loc ((ffi_closure*) cl, |
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221 | n/a | cif, |
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222 | n/a | &ffi_translate_args, |
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223 | n/a | codeloc, |
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224 | n/a | codeloc); |
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225 | n/a | if (status == FFI_OK) |
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226 | n/a | { |
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227 | n/a | cl->fun = fun; |
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228 | n/a | cl->user_data = user_data; |
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229 | n/a | } |
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230 | n/a | |
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231 | n/a | return status; |
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232 | n/a | } |
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233 | n/a | |
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234 | n/a | #endif /* FFI_CLOSURES */ |
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235 | n/a | #endif /* !FFI_NATIVE_RAW_API */ |
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236 | n/a | |
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237 | n/a | #if FFI_CLOSURES |
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238 | n/a | |
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239 | n/a | /* Again, here is the generic version of ffi_prep_raw_closure, which |
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240 | n/a | * will install an intermediate "hub" for translation of arguments from |
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241 | n/a | * the pointer-array format, to the raw format */ |
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242 | n/a | |
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243 | n/a | ffi_status |
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244 | n/a | ffi_prep_raw_closure (ffi_raw_closure* cl, |
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245 | n/a | ffi_cif *cif, |
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246 | n/a | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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247 | n/a | void *user_data) |
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248 | n/a | { |
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249 | n/a | return ffi_prep_raw_closure_loc (cl, cif, fun, user_data, cl); |
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250 | n/a | } |
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251 | n/a | |
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252 | n/a | #endif /* FFI_CLOSURES */ |
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253 | n/a | |
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254 | n/a | #endif /* !FFI_NO_RAW_API */ |
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