1 | /* GNU Objective C Runtime archiving |
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2 | Copyright (C) 1993, 1995 Free Software Foundation, Inc. |
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3 | Contributed by Kresten Krab Thorup |
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4 | |
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5 | This file is part of GNU CC. |
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6 | |
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7 | GNU CC is free software; you can redistribute it and/or modify it under the |
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8 | terms of the GNU General Public License as published by the Free Software |
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9 | Foundation; either version 2, or (at your option) any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY |
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12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
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14 | details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License along with |
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17 | GNU CC; see the file COPYING. If not, write to the Free Software |
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18 | Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | /* As a special exception, if you link this library with files compiled with |
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22 | GCC to produce an executable, this does not cause the resulting executable |
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23 | to be covered by the GNU General Public License. This exception does not |
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24 | however invalidate any other reasons why the executable file might be |
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25 | covered by the GNU General Public License. */ |
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26 | |
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27 | #include "runtime.h" |
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28 | #include "typedstream.h" |
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29 | #include "encoding.h" |
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30 | |
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31 | extern int fflush(FILE*); |
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32 | |
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33 | #define ROUND(V, A) \ |
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34 | ({ typeof(V) __v=(V); typeof(A) __a=(A); \ |
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35 | __a*((__v+__a-1)/__a); }) |
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36 | |
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37 | #define PTR2LONG(P) (((char*)(P))-(char*)0) |
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38 | #define LONG2PTR(L) (((char*)0)+(L)) |
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39 | |
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40 | #define __objc_fatal(format, args...) \ |
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41 | { fprintf(stderr, "archiving: "); \ |
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42 | fprintf(stderr, format, ## args); \ |
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43 | fprintf(stderr, "\n"); abort(); } |
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44 | |
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45 | /* Declare some functions... */ |
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46 | |
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47 | static int |
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48 | objc_read_class (struct objc_typed_stream* stream, Class* class); |
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49 | |
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50 | int objc_sizeof_type(const char* type); |
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51 | |
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52 | static int |
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53 | objc_write_use_common (struct objc_typed_stream* stream, unsigned long key); |
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54 | |
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55 | static int |
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56 | objc_write_register_common (struct objc_typed_stream* stream, |
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57 | unsigned long key); |
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58 | |
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59 | static int |
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60 | objc_write_class (struct objc_typed_stream* stream, |
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61 | struct objc_class* class); |
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62 | |
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63 | const char* objc_skip_type (const char* type); |
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64 | |
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65 | static void __objc_finish_write_root_object(struct objc_typed_stream*); |
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66 | static void __objc_finish_read_root_object(struct objc_typed_stream*); |
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67 | |
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68 | static __inline__ int |
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69 | __objc_code_unsigned_char (unsigned char* buf, unsigned char val) |
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70 | { |
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71 | if ((val&_B_VALUE) == val) |
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72 | { |
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73 | buf[0] = val|_B_SINT; |
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74 | return 1; |
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75 | } |
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76 | else |
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77 | { |
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78 | buf[0] = _B_NINT|0x01; |
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79 | buf[1] = val; |
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80 | return 2; |
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81 | } |
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82 | } |
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83 | |
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84 | int |
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85 | objc_write_unsigned_char (struct objc_typed_stream* stream, |
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86 | unsigned char value) |
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87 | { |
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88 | unsigned char buf[sizeof (unsigned char)+1]; |
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89 | int len = __objc_code_unsigned_char (buf, value); |
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90 | return (*stream->write)(stream->physical, buf, len); |
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91 | } |
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92 | |
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93 | static __inline__ int |
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94 | __objc_code_char (unsigned char* buf, char val) |
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95 | { |
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96 | if (val >= 0) |
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97 | return __objc_code_unsigned_char (buf, val); |
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98 | else |
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99 | { |
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100 | buf[0] = _B_NINT|_B_SIGN|0x01; |
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101 | buf[1] = -val; |
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102 | return 2; |
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103 | } |
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104 | } |
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105 | |
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106 | int |
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107 | objc_write_char (struct objc_typed_stream* stream, char value) |
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108 | { |
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109 | unsigned char buf[sizeof (char)+1]; |
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110 | int len = __objc_code_char (buf, value); |
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111 | return (*stream->write)(stream->physical, buf, len); |
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112 | } |
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113 | |
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114 | static __inline__ int |
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115 | __objc_code_unsigned_short (unsigned char* buf, unsigned short val) |
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116 | { |
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117 | if ((val&_B_VALUE) == val) |
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118 | { |
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119 | buf[0] = val|_B_SINT; |
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120 | return 1; |
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121 | } |
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122 | else |
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123 | { |
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124 | int c, b; |
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125 | |
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126 | buf[0] = _B_NINT; |
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127 | |
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128 | for (c= sizeof(short); c != 0; c -= 1) |
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129 | if (((val>>(8*(c-1)))%0x100) != 0) |
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130 | break; |
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131 | |
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132 | buf[0] |= c; |
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133 | |
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134 | for (b = 1; c != 0; c--, b++) |
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135 | { |
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136 | buf[b] = (val >> (8*(c-1)))%0x100; |
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137 | } |
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138 | |
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139 | return b; |
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140 | } |
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141 | } |
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142 | |
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143 | int |
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144 | objc_write_unsigned_short (struct objc_typed_stream* stream, unsigned short value) |
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145 | { |
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146 | unsigned char buf[sizeof (unsigned short)+1]; |
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147 | int len = __objc_code_unsigned_short (buf, value); |
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148 | return (*stream->write)(stream->physical, buf, len); |
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149 | } |
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150 | |
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151 | static __inline__ int |
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152 | __objc_code_short (unsigned char* buf, short val) |
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153 | { |
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154 | int sign = (val < 0); |
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155 | int size = __objc_code_unsigned_short (buf, sign ? -val : val); |
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156 | if (sign) |
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157 | buf[0] |= _B_SIGN; |
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158 | return size; |
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159 | } |
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160 | |
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161 | int |
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162 | objc_write_short (struct objc_typed_stream* stream, short value) |
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163 | { |
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164 | unsigned char buf[sizeof (short)+1]; |
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165 | int len = __objc_code_short (buf, value); |
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166 | return (*stream->write)(stream->physical, buf, len); |
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167 | } |
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168 | |
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169 | |
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170 | static __inline__ int |
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171 | __objc_code_unsigned_int (unsigned char* buf, unsigned int val) |
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172 | { |
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173 | if ((val&_B_VALUE) == val) |
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174 | { |
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175 | buf[0] = val|_B_SINT; |
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176 | return 1; |
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177 | } |
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178 | else |
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179 | { |
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180 | int c, b; |
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181 | |
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182 | buf[0] = _B_NINT; |
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183 | |
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184 | for (c= sizeof(int); c != 0; c -= 1) |
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185 | if (((val>>(8*(c-1)))%0x100) != 0) |
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186 | break; |
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187 | |
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188 | buf[0] |= c; |
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189 | |
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190 | for (b = 1; c != 0; c--, b++) |
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191 | { |
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192 | buf[b] = (val >> (8*(c-1)))%0x100; |
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193 | } |
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194 | |
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195 | return b; |
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196 | } |
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197 | } |
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198 | |
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199 | int |
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200 | objc_write_unsigned_int (struct objc_typed_stream* stream, unsigned int value) |
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201 | { |
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202 | unsigned char buf[sizeof(unsigned int)+1]; |
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203 | int len = __objc_code_unsigned_int (buf, value); |
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204 | return (*stream->write)(stream->physical, buf, len); |
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205 | } |
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206 | |
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207 | static __inline__ int |
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208 | __objc_code_int (unsigned char* buf, int val) |
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209 | { |
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210 | int sign = (val < 0); |
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211 | int size = __objc_code_unsigned_int (buf, sign ? -val : val); |
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212 | if (sign) |
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213 | buf[0] |= _B_SIGN; |
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214 | return size; |
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215 | } |
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216 | |
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217 | int |
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218 | objc_write_int (struct objc_typed_stream* stream, int value) |
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219 | { |
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220 | unsigned char buf[sizeof(int)+1]; |
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221 | int len = __objc_code_int (buf, value); |
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222 | return (*stream->write)(stream->physical, buf, len); |
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223 | } |
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224 | |
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225 | static __inline__ int |
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226 | __objc_code_unsigned_long (unsigned char* buf, unsigned long val) |
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227 | { |
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228 | if ((val&_B_VALUE) == val) |
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229 | { |
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230 | buf[0] = val|_B_SINT; |
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231 | return 1; |
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232 | } |
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233 | else |
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234 | { |
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235 | int c, b; |
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236 | |
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237 | buf[0] = _B_NINT; |
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238 | |
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239 | for (c= sizeof(long); c != 0; c -= 1) |
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240 | if (((val>>(8*(c-1)))%0x100) != 0) |
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241 | break; |
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242 | |
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243 | buf[0] |= c; |
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244 | |
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245 | for (b = 1; c != 0; c--, b++) |
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246 | { |
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247 | buf[b] = (val >> (8*(c-1)))%0x100; |
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248 | } |
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249 | |
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250 | return b; |
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251 | } |
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252 | } |
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253 | |
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254 | int |
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255 | objc_write_unsigned_long (struct objc_typed_stream* stream, unsigned long value) |
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256 | { |
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257 | unsigned char buf[sizeof(unsigned long)+1]; |
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258 | int len = __objc_code_unsigned_long (buf, value); |
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259 | return (*stream->write)(stream->physical, buf, len); |
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260 | } |
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261 | |
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262 | static __inline__ int |
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263 | __objc_code_long (unsigned char* buf, long val) |
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264 | { |
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265 | int sign = (val < 0); |
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266 | int size = __objc_code_unsigned_long (buf, sign ? -val : val); |
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267 | if (sign) |
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268 | buf[0] |= _B_SIGN; |
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269 | return size; |
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270 | } |
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271 | |
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272 | int |
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273 | objc_write_long (struct objc_typed_stream* stream, long value) |
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274 | { |
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275 | unsigned char buf[sizeof(long)+1]; |
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276 | int len = __objc_code_long (buf, value); |
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277 | return (*stream->write)(stream->physical, buf, len); |
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278 | } |
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279 | |
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280 | |
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281 | int |
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282 | objc_write_string (struct objc_typed_stream* stream, |
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283 | const unsigned char* string, unsigned int nbytes) |
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284 | { |
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285 | unsigned char buf[sizeof(unsigned int)+1]; |
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286 | int len = __objc_code_unsigned_int (buf, nbytes); |
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287 | |
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288 | if ((buf[0]&_B_CODE) == _B_SINT) |
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289 | buf[0] = (buf[0]&_B_VALUE)|_B_SSTR; |
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290 | |
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291 | else /* _B_NINT */ |
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292 | buf[0] = (buf[0]&_B_VALUE)|_B_NSTR; |
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293 | |
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294 | if ((*stream->write)(stream->physical, buf, len) != 0) |
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295 | return (*stream->write)(stream->physical, string, nbytes); |
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296 | else |
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297 | return 0; |
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298 | } |
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299 | |
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300 | int |
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301 | objc_write_string_atomic (struct objc_typed_stream* stream, |
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302 | unsigned char* string, unsigned int nbytes) |
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303 | { |
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304 | unsigned long key; |
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305 | if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, string)))) |
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306 | return objc_write_use_common (stream, key); |
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307 | else |
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308 | { |
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309 | int length; |
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310 | hash_add (&stream->stream_table, LONG2PTR(key=PTR2LONG(string)), string); |
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311 | if ((length = objc_write_register_common (stream, key))) |
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312 | return objc_write_string (stream, string, nbytes); |
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313 | return length; |
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314 | } |
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315 | } |
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316 | |
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317 | static int |
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318 | objc_write_register_common (struct objc_typed_stream* stream, unsigned long key) |
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319 | { |
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320 | unsigned char buf[sizeof (unsigned long)+2]; |
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321 | int len = __objc_code_unsigned_long (buf+1, key); |
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322 | if (len == 1) |
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323 | { |
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324 | buf[0] = _B_RCOMM|0x01; |
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325 | buf[1] &= _B_VALUE; |
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326 | return (*stream->write)(stream->physical, buf, len+1); |
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327 | } |
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328 | else |
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329 | { |
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330 | buf[1] = (buf[1]&_B_VALUE)|_B_RCOMM; |
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331 | return (*stream->write)(stream->physical, buf+1, len); |
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332 | } |
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333 | } |
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334 | |
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335 | static int |
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336 | objc_write_use_common (struct objc_typed_stream* stream, unsigned long key) |
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337 | { |
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338 | unsigned char buf[sizeof (unsigned long)+2]; |
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339 | int len = __objc_code_unsigned_long (buf+1, key); |
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340 | if (len == 1) |
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341 | { |
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342 | buf[0] = _B_UCOMM|0x01; |
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343 | buf[1] &= _B_VALUE; |
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344 | return (*stream->write)(stream->physical, buf, 2); |
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345 | } |
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346 | else |
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347 | { |
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348 | buf[1] = (buf[1]&_B_VALUE)|_B_UCOMM; |
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349 | return (*stream->write)(stream->physical, buf+1, len); |
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350 | } |
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351 | } |
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352 | |
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353 | static __inline__ int |
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354 | __objc_write_extension (struct objc_typed_stream* stream, unsigned char code) |
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355 | { |
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356 | if (code <= _B_VALUE) |
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357 | { |
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358 | unsigned char buf = code|_B_EXT; |
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359 | return (*stream->write)(stream->physical, &buf, 1); |
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360 | } |
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361 | else |
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362 | abort(); |
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363 | } |
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364 | |
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365 | __inline__ int |
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366 | __objc_write_object (struct objc_typed_stream* stream, id object) |
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367 | { |
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368 | unsigned char buf = '\0'; |
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369 | SEL write_sel = sel_get_any_uid ("write:"); |
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370 | if (object) |
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371 | { |
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372 | __objc_write_extension (stream, _BX_OBJECT); |
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373 | objc_write_class (stream, object->class_pointer); |
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374 | (*objc_msg_lookup(object, write_sel))(object, write_sel, stream); |
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375 | return (*stream->write)(stream->physical, &buf, 1); |
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376 | } |
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377 | else |
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378 | return objc_write_use_common(stream, 0); |
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379 | } |
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380 | |
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381 | int |
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382 | objc_write_object_reference (struct objc_typed_stream* stream, id object) |
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383 | { |
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384 | unsigned long key; |
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385 | if ((key = PTR2LONG(hash_value_for_key (stream->object_table, object)))) |
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386 | return objc_write_use_common (stream, key); |
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387 | |
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388 | __objc_write_extension (stream, _BX_OBJREF); |
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389 | return objc_write_unsigned_long (stream, PTR2LONG (object)); |
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390 | } |
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391 | |
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392 | int |
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393 | objc_write_root_object (struct objc_typed_stream* stream, id object) |
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394 | { |
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395 | int len; |
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396 | if (stream->writing_root_p) |
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397 | __objc_fatal ("objc_write_root_object called recursively") |
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398 | else |
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399 | { |
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400 | stream->writing_root_p = 1; |
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401 | __objc_write_extension (stream, _BX_OBJROOT); |
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402 | if((len = objc_write_object (stream, object))) |
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403 | __objc_finish_write_root_object(stream); |
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404 | stream->writing_root_p = 0; |
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405 | } |
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406 | return len; |
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407 | } |
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408 | |
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409 | int |
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410 | objc_write_object (struct objc_typed_stream* stream, id object) |
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411 | { |
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412 | unsigned long key; |
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413 | if ((key = PTR2LONG(hash_value_for_key (stream->object_table, object)))) |
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414 | return objc_write_use_common (stream, key); |
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415 | |
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416 | else if (object == nil) |
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417 | return objc_write_use_common(stream, 0); |
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418 | |
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419 | else |
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420 | { |
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421 | int length; |
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422 | hash_add (&stream->object_table, LONG2PTR(key=PTR2LONG(object)), object); |
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423 | if ((length = objc_write_register_common (stream, key))) |
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424 | return __objc_write_object (stream, object); |
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425 | return length; |
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426 | } |
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427 | } |
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428 | |
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429 | #ifdef __alpha__ |
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430 | extern int atoi (const char*); |
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431 | extern size_t strlen(const char*); |
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432 | extern size_t strcpy(char*, const char*); |
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433 | #endif |
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434 | |
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435 | __inline__ int |
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436 | __objc_write_class (struct objc_typed_stream* stream, struct objc_class* class) |
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437 | { |
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438 | __objc_write_extension (stream, _BX_CLASS); |
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439 | objc_write_string_atomic(stream, (char*)class->name, |
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440 | strlen((char*)class->name)); |
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441 | return objc_write_unsigned_long (stream, class->version); |
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442 | } |
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443 | |
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444 | |
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445 | static int |
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446 | objc_write_class (struct objc_typed_stream* stream, |
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447 | struct objc_class* class) |
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448 | { |
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449 | unsigned long key; |
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450 | if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, class)))) |
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451 | return objc_write_use_common (stream, key); |
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452 | else |
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453 | { |
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454 | int length; |
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455 | hash_add (&stream->stream_table, LONG2PTR(key=PTR2LONG(class)), class); |
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456 | if ((length = objc_write_register_common (stream, key))) |
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457 | return __objc_write_class (stream, class); |
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458 | return length; |
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459 | } |
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460 | } |
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461 | |
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462 | |
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463 | __inline__ int |
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464 | __objc_write_selector (struct objc_typed_stream* stream, SEL selector) |
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465 | { |
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466 | const char* sel_name; |
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467 | __objc_write_extension (stream, _BX_SEL); |
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468 | /* to handle NULL selectors */ |
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469 | if ((SEL)0 == selector) |
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470 | return objc_write_string (stream, "", 0); |
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471 | sel_name = sel_get_name (selector); |
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472 | return objc_write_string (stream, sel_name, strlen ((char*)sel_name)); |
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473 | } |
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474 | |
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475 | int |
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476 | objc_write_selector (struct objc_typed_stream* stream, SEL selector) |
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477 | { |
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478 | const char* sel_name; |
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479 | unsigned long key; |
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480 | |
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481 | /* to handle NULL selectors */ |
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482 | if ((SEL)0 == selector) |
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483 | return __objc_write_selector (stream, selector); |
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484 | |
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485 | sel_name = sel_get_name (selector); |
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486 | if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, sel_name)))) |
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487 | return objc_write_use_common (stream, key); |
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488 | else |
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489 | { |
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490 | int length; |
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491 | hash_add (&stream->stream_table, LONG2PTR(key=PTR2LONG(sel_name)), (char*)sel_name); |
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492 | if ((length = objc_write_register_common (stream, key))) |
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493 | return __objc_write_selector (stream, selector); |
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494 | return length; |
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495 | } |
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496 | } |
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497 | |
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498 | |
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499 | |
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500 | /* |
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501 | ** Read operations |
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502 | */ |
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503 | |
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504 | __inline__ int |
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505 | objc_read_char (struct objc_typed_stream* stream, char* val) |
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506 | { |
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507 | unsigned char buf; |
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508 | int len; |
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509 | len = (*stream->read)(stream->physical, &buf, 1); |
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510 | if (len != 0) |
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511 | { |
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512 | if ((buf & _B_CODE) == _B_SINT) |
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513 | (*val) = (buf & _B_VALUE); |
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514 | |
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515 | else if ((buf & _B_NUMBER) == 1) |
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516 | { |
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517 | len = (*stream->read)(stream->physical, val, 1); |
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518 | if (buf&_B_SIGN) |
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519 | (*val) = -1*(*val); |
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520 | } |
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521 | |
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522 | else |
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523 | __objc_fatal("expected 8bit signed int, got %dbit int", |
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524 | (int)(buf&_B_NUMBER)*8); |
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525 | } |
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526 | return len; |
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527 | } |
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528 | |
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529 | |
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530 | __inline__ int |
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531 | objc_read_unsigned_char (struct objc_typed_stream* stream, unsigned char* val) |
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532 | { |
---|
533 | unsigned char buf; |
---|
534 | int len; |
---|
535 | if ((len = (*stream->read)(stream->physical, &buf, 1))) |
---|
536 | { |
---|
537 | if ((buf & _B_CODE) == _B_SINT) |
---|
538 | (*val) = (buf & _B_VALUE); |
---|
539 | |
---|
540 | else if ((buf & _B_NUMBER) == 1) |
---|
541 | len = (*stream->read)(stream->physical, val, 1); |
---|
542 | |
---|
543 | else |
---|
544 | __objc_fatal("expected 8bit unsigned int, got %dbit int", |
---|
545 | (int)(buf&_B_NUMBER)*8); |
---|
546 | } |
---|
547 | return len; |
---|
548 | } |
---|
549 | |
---|
550 | __inline__ int |
---|
551 | objc_read_short (struct objc_typed_stream* stream, short* value) |
---|
552 | { |
---|
553 | unsigned char buf[sizeof(short)+1]; |
---|
554 | int len; |
---|
555 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
556 | { |
---|
557 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
558 | (*value) = (buf[0] & _B_VALUE); |
---|
559 | |
---|
560 | else |
---|
561 | { |
---|
562 | int pos = 1; |
---|
563 | int nbytes = buf[0] & _B_NUMBER; |
---|
564 | if (nbytes > sizeof (short)) |
---|
565 | __objc_fatal("expected short, got bigger (%dbits)", nbytes*8); |
---|
566 | len = (*stream->read)(stream->physical, buf+1, nbytes); |
---|
567 | (*value) = 0; |
---|
568 | while (pos <= nbytes) |
---|
569 | (*value) = ((*value)*0x100) + buf[pos++]; |
---|
570 | if (buf[0] & _B_SIGN) |
---|
571 | (*value) = -(*value); |
---|
572 | } |
---|
573 | } |
---|
574 | return len; |
---|
575 | } |
---|
576 | |
---|
577 | __inline__ int |
---|
578 | objc_read_unsigned_short (struct objc_typed_stream* stream, |
---|
579 | unsigned short* value) |
---|
580 | { |
---|
581 | unsigned char buf[sizeof(unsigned short)+1]; |
---|
582 | int len; |
---|
583 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
584 | { |
---|
585 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
586 | (*value) = (buf[0] & _B_VALUE); |
---|
587 | |
---|
588 | else |
---|
589 | { |
---|
590 | int pos = 1; |
---|
591 | int nbytes = buf[0] & _B_NUMBER; |
---|
592 | if (nbytes > sizeof (short)) |
---|
593 | __objc_fatal("expected short, got int or bigger"); |
---|
594 | len = (*stream->read)(stream->physical, buf+1, nbytes); |
---|
595 | (*value) = 0; |
---|
596 | while (pos <= nbytes) |
---|
597 | (*value) = ((*value)*0x100) + buf[pos++]; |
---|
598 | } |
---|
599 | } |
---|
600 | return len; |
---|
601 | } |
---|
602 | |
---|
603 | |
---|
604 | __inline__ int |
---|
605 | objc_read_int (struct objc_typed_stream* stream, int* value) |
---|
606 | { |
---|
607 | unsigned char buf[sizeof(int)+1]; |
---|
608 | int len; |
---|
609 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
610 | { |
---|
611 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
612 | (*value) = (buf[0] & _B_VALUE); |
---|
613 | |
---|
614 | else |
---|
615 | { |
---|
616 | int pos = 1; |
---|
617 | int nbytes = buf[0] & _B_NUMBER; |
---|
618 | if (nbytes > sizeof (int)) |
---|
619 | __objc_fatal("expected int, got bigger"); |
---|
620 | len = (*stream->read)(stream->physical, buf+1, nbytes); |
---|
621 | (*value) = 0; |
---|
622 | while (pos <= nbytes) |
---|
623 | (*value) = ((*value)*0x100) + buf[pos++]; |
---|
624 | if (buf[0] & _B_SIGN) |
---|
625 | (*value) = -(*value); |
---|
626 | } |
---|
627 | } |
---|
628 | return len; |
---|
629 | } |
---|
630 | |
---|
631 | __inline__ int |
---|
632 | objc_read_long (struct objc_typed_stream* stream, long* value) |
---|
633 | { |
---|
634 | unsigned char buf[sizeof(long)+1]; |
---|
635 | int len; |
---|
636 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
637 | { |
---|
638 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
639 | (*value) = (buf[0] & _B_VALUE); |
---|
640 | |
---|
641 | else |
---|
642 | { |
---|
643 | int pos = 1; |
---|
644 | int nbytes = buf[0] & _B_NUMBER; |
---|
645 | if (nbytes > sizeof (long)) |
---|
646 | __objc_fatal("expected long, got bigger"); |
---|
647 | len = (*stream->read)(stream->physical, buf+1, nbytes); |
---|
648 | (*value) = 0; |
---|
649 | while (pos <= nbytes) |
---|
650 | (*value) = ((*value)*0x100) + buf[pos++]; |
---|
651 | if (buf[0] & _B_SIGN) |
---|
652 | (*value) = -(*value); |
---|
653 | } |
---|
654 | } |
---|
655 | return len; |
---|
656 | } |
---|
657 | |
---|
658 | __inline__ int |
---|
659 | __objc_read_nbyte_uint (struct objc_typed_stream* stream, |
---|
660 | unsigned int nbytes, unsigned int* val) |
---|
661 | { |
---|
662 | int len, pos = 0; |
---|
663 | unsigned char buf[sizeof(unsigned int)+1]; |
---|
664 | |
---|
665 | if (nbytes > sizeof (int)) |
---|
666 | __objc_fatal("expected int, got bigger"); |
---|
667 | |
---|
668 | len = (*stream->read)(stream->physical, buf, nbytes); |
---|
669 | (*val) = 0; |
---|
670 | while (pos < nbytes) |
---|
671 | (*val) = ((*val)*0x100) + buf[pos++]; |
---|
672 | return len; |
---|
673 | } |
---|
674 | |
---|
675 | |
---|
676 | __inline__ int |
---|
677 | objc_read_unsigned_int (struct objc_typed_stream* stream, |
---|
678 | unsigned int* value) |
---|
679 | { |
---|
680 | unsigned char buf[sizeof(unsigned int)+1]; |
---|
681 | int len; |
---|
682 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
683 | { |
---|
684 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
685 | (*value) = (buf[0] & _B_VALUE); |
---|
686 | |
---|
687 | else |
---|
688 | len = __objc_read_nbyte_uint (stream, (buf[0] & _B_VALUE), value); |
---|
689 | |
---|
690 | } |
---|
691 | return len; |
---|
692 | } |
---|
693 | |
---|
694 | int |
---|
695 | __objc_read_nbyte_ulong (struct objc_typed_stream* stream, |
---|
696 | unsigned int nbytes, unsigned long* val) |
---|
697 | { |
---|
698 | int len, pos = 0; |
---|
699 | unsigned char buf[sizeof(unsigned long)+1]; |
---|
700 | |
---|
701 | if (nbytes > sizeof (long)) |
---|
702 | __objc_fatal("expected long, got bigger"); |
---|
703 | |
---|
704 | len = (*stream->read)(stream->physical, buf, nbytes); |
---|
705 | (*val) = 0; |
---|
706 | while (pos < nbytes) |
---|
707 | (*val) = ((*val)*0x100) + buf[pos++]; |
---|
708 | return len; |
---|
709 | } |
---|
710 | |
---|
711 | |
---|
712 | __inline__ int |
---|
713 | objc_read_unsigned_long (struct objc_typed_stream* stream, |
---|
714 | unsigned long* value) |
---|
715 | { |
---|
716 | unsigned char buf[sizeof(unsigned long)+1]; |
---|
717 | int len; |
---|
718 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
719 | { |
---|
720 | if ((buf[0] & _B_CODE) == _B_SINT) |
---|
721 | (*value) = (buf[0] & _B_VALUE); |
---|
722 | |
---|
723 | else |
---|
724 | len = __objc_read_nbyte_ulong (stream, (buf[0] & _B_VALUE), value); |
---|
725 | |
---|
726 | } |
---|
727 | return len; |
---|
728 | } |
---|
729 | |
---|
730 | __inline__ int |
---|
731 | objc_read_string (struct objc_typed_stream* stream, |
---|
732 | char** string) |
---|
733 | { |
---|
734 | unsigned char buf[sizeof(unsigned int)+1]; |
---|
735 | int len; |
---|
736 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
737 | { |
---|
738 | unsigned long key = 0; |
---|
739 | |
---|
740 | if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */ |
---|
741 | { |
---|
742 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
743 | len = (*stream->read)(stream->physical, buf, 1); |
---|
744 | } |
---|
745 | |
---|
746 | switch (buf[0]&_B_CODE) { |
---|
747 | case _B_SSTR: |
---|
748 | { |
---|
749 | int length = buf[0]&_B_VALUE; |
---|
750 | (*string) = (char*)__objc_xmalloc(length+1); |
---|
751 | if (key) |
---|
752 | hash_add (&stream->stream_table, LONG2PTR(key), *string); |
---|
753 | len = (*stream->read)(stream->physical, *string, length); |
---|
754 | (*string)[length] = '\0'; |
---|
755 | } |
---|
756 | break; |
---|
757 | |
---|
758 | case _B_UCOMM: |
---|
759 | { |
---|
760 | char *tmp; |
---|
761 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
762 | tmp = hash_value_for_key (stream->stream_table, LONG2PTR (key)); |
---|
763 | *string = __objc_xmalloc (strlen(tmp) + 1); |
---|
764 | strcpy (*string, tmp); |
---|
765 | } |
---|
766 | break; |
---|
767 | |
---|
768 | case _B_NSTR: |
---|
769 | { |
---|
770 | unsigned int nbytes = buf[0]&_B_VALUE; |
---|
771 | len = __objc_read_nbyte_uint(stream, nbytes, &nbytes); |
---|
772 | if (len) { |
---|
773 | (*string) = (char*)__objc_xmalloc(nbytes+1); |
---|
774 | if (key) |
---|
775 | hash_add (&stream->stream_table, LONG2PTR(key), *string); |
---|
776 | len = (*stream->read)(stream->physical, *string, nbytes); |
---|
777 | (*string)[nbytes] = '\0'; |
---|
778 | } |
---|
779 | } |
---|
780 | break; |
---|
781 | |
---|
782 | default: |
---|
783 | __objc_fatal("expected string, got opcode %c\n", (buf[0]&_B_CODE)); |
---|
784 | } |
---|
785 | } |
---|
786 | |
---|
787 | return len; |
---|
788 | } |
---|
789 | |
---|
790 | |
---|
791 | int |
---|
792 | objc_read_object (struct objc_typed_stream* stream, id* object) |
---|
793 | { |
---|
794 | unsigned char buf[sizeof (unsigned int)]; |
---|
795 | int len; |
---|
796 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
797 | { |
---|
798 | SEL read_sel = sel_get_any_uid ("read:"); |
---|
799 | unsigned long key = 0; |
---|
800 | |
---|
801 | if ((buf[0]&_B_CODE) == _B_RCOMM) /* register common */ |
---|
802 | { |
---|
803 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
804 | len = (*stream->read)(stream->physical, buf, 1); |
---|
805 | } |
---|
806 | |
---|
807 | if (buf[0] == (_B_EXT | _BX_OBJECT)) |
---|
808 | { |
---|
809 | Class class; |
---|
810 | |
---|
811 | /* get class */ |
---|
812 | len = objc_read_class (stream, &class); |
---|
813 | |
---|
814 | /* create instance */ |
---|
815 | (*object) = class_create_instance(class); |
---|
816 | |
---|
817 | /* register? */ |
---|
818 | if (key) |
---|
819 | hash_add (&stream->object_table, LONG2PTR(key), *object); |
---|
820 | |
---|
821 | /* send -read: */ |
---|
822 | if (__objc_responds_to (*object, read_sel)) |
---|
823 | (*get_imp(class, read_sel))(*object, read_sel, stream); |
---|
824 | |
---|
825 | /* check null-byte */ |
---|
826 | len = (*stream->read)(stream->physical, buf, 1); |
---|
827 | if (buf[0] != '\0') |
---|
828 | __objc_fatal("expected null-byte, got opcode %c", buf[0]); |
---|
829 | } |
---|
830 | |
---|
831 | else if ((buf[0]&_B_CODE) == _B_UCOMM) |
---|
832 | { |
---|
833 | if (key) |
---|
834 | __objc_fatal("cannot register use upcode..."); |
---|
835 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
836 | (*object) = hash_value_for_key (stream->object_table, LONG2PTR(key)); |
---|
837 | } |
---|
838 | |
---|
839 | else if (buf[0] == (_B_EXT | _BX_OBJREF)) /* a forward reference */ |
---|
840 | { |
---|
841 | struct objc_list* other; |
---|
842 | len = objc_read_unsigned_long (stream, &key); |
---|
843 | other = (struct objc_list*)hash_value_for_key (stream->object_refs, LONG2PTR(key)); |
---|
844 | hash_add (&stream->object_refs, LONG2PTR(key), (void*)list_cons(object, other)); |
---|
845 | } |
---|
846 | |
---|
847 | else if (buf[0] == (_B_EXT | _BX_OBJROOT)) /* a root object */ |
---|
848 | { |
---|
849 | if (key) |
---|
850 | __objc_fatal("cannot register root object..."); |
---|
851 | len = objc_read_object (stream, object); |
---|
852 | __objc_finish_read_root_object (stream); |
---|
853 | } |
---|
854 | |
---|
855 | else |
---|
856 | __objc_fatal("expected object, got opcode %c", buf[0]); |
---|
857 | } |
---|
858 | return len; |
---|
859 | } |
---|
860 | |
---|
861 | static int |
---|
862 | objc_read_class (struct objc_typed_stream* stream, Class* class) |
---|
863 | { |
---|
864 | unsigned char buf[sizeof (unsigned int)]; |
---|
865 | int len; |
---|
866 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
867 | { |
---|
868 | unsigned long key = 0; |
---|
869 | |
---|
870 | if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */ |
---|
871 | { |
---|
872 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
873 | len = (*stream->read)(stream->physical, buf, 1); |
---|
874 | } |
---|
875 | |
---|
876 | if (buf[0] == (_B_EXT | _BX_CLASS)) |
---|
877 | { |
---|
878 | char* class_name; |
---|
879 | unsigned long version; |
---|
880 | |
---|
881 | /* get class */ |
---|
882 | len = objc_read_string (stream, &class_name); |
---|
883 | (*class) = objc_get_class(class_name); |
---|
884 | free (class_name); |
---|
885 | |
---|
886 | /* register */ |
---|
887 | if (key) |
---|
888 | hash_add (&stream->stream_table, LONG2PTR(key), *class); |
---|
889 | |
---|
890 | objc_read_unsigned_long(stream, &version); |
---|
891 | hash_add (&stream->class_table, (*class)->name, (void*)version); |
---|
892 | } |
---|
893 | |
---|
894 | else if ((buf[0]&_B_CODE) == _B_UCOMM) |
---|
895 | { |
---|
896 | if (key) |
---|
897 | __objc_fatal("cannot register use upcode..."); |
---|
898 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
899 | (*class) = hash_value_for_key (stream->stream_table, LONG2PTR(key)); |
---|
900 | if (!*class) |
---|
901 | __objc_fatal("cannot find class for key %lu", key); |
---|
902 | } |
---|
903 | |
---|
904 | else |
---|
905 | __objc_fatal("expected class, got opcode %c", buf[0]); |
---|
906 | } |
---|
907 | return len; |
---|
908 | } |
---|
909 | |
---|
910 | int |
---|
911 | objc_read_selector (struct objc_typed_stream* stream, SEL* selector) |
---|
912 | { |
---|
913 | unsigned char buf[sizeof (unsigned int)]; |
---|
914 | int len; |
---|
915 | if ((len = (*stream->read)(stream->physical, buf, 1))) |
---|
916 | { |
---|
917 | unsigned long key = 0; |
---|
918 | |
---|
919 | if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */ |
---|
920 | { |
---|
921 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
922 | len = (*stream->read)(stream->physical, buf, 1); |
---|
923 | } |
---|
924 | |
---|
925 | if (buf[0] == (_B_EXT|_BX_SEL)) /* selector! */ |
---|
926 | { |
---|
927 | char* selector_name; |
---|
928 | |
---|
929 | /* get selector */ |
---|
930 | len = objc_read_string (stream, &selector_name); |
---|
931 | /* To handle NULL selectors */ |
---|
932 | if (0 == strlen(selector_name)) |
---|
933 | { |
---|
934 | (*selector) = (SEL)0; |
---|
935 | return 0; |
---|
936 | } |
---|
937 | else |
---|
938 | (*selector) = sel_get_any_uid(selector_name); |
---|
939 | free (selector_name); |
---|
940 | |
---|
941 | /* register */ |
---|
942 | if (key) |
---|
943 | hash_add (&stream->stream_table, LONG2PTR(key), (void*)*selector); |
---|
944 | } |
---|
945 | |
---|
946 | else if ((buf[0]&_B_CODE) == _B_UCOMM) |
---|
947 | { |
---|
948 | if (key) |
---|
949 | __objc_fatal("cannot register use upcode..."); |
---|
950 | len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key); |
---|
951 | (*selector) = hash_value_for_key (stream->stream_table, LONG2PTR(key)); |
---|
952 | } |
---|
953 | |
---|
954 | else |
---|
955 | __objc_fatal("expected selector, got opcode %c", buf[0]); |
---|
956 | } |
---|
957 | return len; |
---|
958 | } |
---|
959 | |
---|
960 | /* |
---|
961 | ** USER LEVEL FUNCTIONS |
---|
962 | */ |
---|
963 | |
---|
964 | /* |
---|
965 | ** Write one object, encoded in TYPE and pointed to by DATA to the |
---|
966 | ** typed stream STREAM. |
---|
967 | */ |
---|
968 | |
---|
969 | int |
---|
970 | objc_write_type(TypedStream* stream, const char* type, const void* data) |
---|
971 | { |
---|
972 | switch(*type) { |
---|
973 | case _C_ID: |
---|
974 | return objc_write_object (stream, *(id*)data); |
---|
975 | break; |
---|
976 | |
---|
977 | case _C_CLASS: |
---|
978 | return objc_write_class (stream, *(Class*)data); |
---|
979 | break; |
---|
980 | |
---|
981 | case _C_SEL: |
---|
982 | return objc_write_selector (stream, *(SEL*)data); |
---|
983 | break; |
---|
984 | |
---|
985 | case _C_CHR: |
---|
986 | return objc_write_char(stream, *(char*)data); |
---|
987 | break; |
---|
988 | |
---|
989 | case _C_UCHR: |
---|
990 | return objc_write_unsigned_char(stream, *(unsigned char*)data); |
---|
991 | break; |
---|
992 | |
---|
993 | case _C_SHT: |
---|
994 | return objc_write_short(stream, *(short*)data); |
---|
995 | break; |
---|
996 | |
---|
997 | case _C_USHT: |
---|
998 | return objc_write_unsigned_short(stream, *(unsigned short*)data); |
---|
999 | break; |
---|
1000 | |
---|
1001 | case _C_INT: |
---|
1002 | return objc_write_int(stream, *(int*)data); |
---|
1003 | break; |
---|
1004 | |
---|
1005 | case _C_UINT: |
---|
1006 | return objc_write_unsigned_int(stream, *(unsigned int*)data); |
---|
1007 | break; |
---|
1008 | |
---|
1009 | case _C_LNG: |
---|
1010 | return objc_write_long(stream, *(long*)data); |
---|
1011 | break; |
---|
1012 | |
---|
1013 | case _C_ULNG: |
---|
1014 | return objc_write_unsigned_long(stream, *(unsigned long*)data); |
---|
1015 | break; |
---|
1016 | |
---|
1017 | case _C_CHARPTR: |
---|
1018 | return objc_write_string (stream, *(char**)data, strlen(*(char**)data)); |
---|
1019 | break; |
---|
1020 | |
---|
1021 | case _C_ATOM: |
---|
1022 | return objc_write_string_atomic (stream, *(char**)data, strlen(*(char**)data)); |
---|
1023 | break; |
---|
1024 | |
---|
1025 | case _C_ARY_B: |
---|
1026 | { |
---|
1027 | int len = atoi(type+1); |
---|
1028 | while (isdigit(*++type)); |
---|
1029 | return objc_write_array (stream, type, len, data); |
---|
1030 | } |
---|
1031 | break; |
---|
1032 | |
---|
1033 | case _C_STRUCT_B: |
---|
1034 | { |
---|
1035 | int acc_size = 0; |
---|
1036 | int align; |
---|
1037 | while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */ |
---|
1038 | while (*type != _C_STRUCT_E); |
---|
1039 | { |
---|
1040 | align = objc_alignof_type (type); /* padd to alignment */ |
---|
1041 | acc_size += ROUND (acc_size, align); |
---|
1042 | objc_write_type (stream, type, ((char*)data)+acc_size); |
---|
1043 | acc_size += objc_sizeof_type (type); /* add component size */ |
---|
1044 | type = objc_skip_typespec (type); /* skip component */ |
---|
1045 | } |
---|
1046 | return 1; |
---|
1047 | } |
---|
1048 | |
---|
1049 | default: |
---|
1050 | fprintf(stderr, "objc_write_type: cannot parse typespec: %s\n", type); |
---|
1051 | abort(); |
---|
1052 | } |
---|
1053 | } |
---|
1054 | |
---|
1055 | /* |
---|
1056 | ** Read one object, encoded in TYPE and pointed to by DATA to the |
---|
1057 | ** typed stream STREAM. DATA specifies the address of the types to |
---|
1058 | ** read. Expected type is checked against the type actually present |
---|
1059 | ** on the stream. |
---|
1060 | */ |
---|
1061 | |
---|
1062 | int |
---|
1063 | objc_read_type(TypedStream* stream, const char* type, void* data) |
---|
1064 | { |
---|
1065 | char c; |
---|
1066 | switch(c = *type) { |
---|
1067 | case _C_ID: |
---|
1068 | return objc_read_object (stream, (id*)data); |
---|
1069 | break; |
---|
1070 | |
---|
1071 | case _C_CLASS: |
---|
1072 | return objc_read_class (stream, (Class*)data); |
---|
1073 | break; |
---|
1074 | |
---|
1075 | case _C_SEL: |
---|
1076 | return objc_read_selector (stream, (SEL*)data); |
---|
1077 | break; |
---|
1078 | |
---|
1079 | case _C_CHR: |
---|
1080 | return objc_read_char (stream, (char*)data); |
---|
1081 | break; |
---|
1082 | |
---|
1083 | case _C_UCHR: |
---|
1084 | return objc_read_unsigned_char (stream, (unsigned char*)data); |
---|
1085 | break; |
---|
1086 | |
---|
1087 | case _C_SHT: |
---|
1088 | return objc_read_short (stream, (short*)data); |
---|
1089 | break; |
---|
1090 | |
---|
1091 | case _C_USHT: |
---|
1092 | return objc_read_unsigned_short (stream, (unsigned short*)data); |
---|
1093 | break; |
---|
1094 | |
---|
1095 | case _C_INT: |
---|
1096 | return objc_read_int (stream, (int*)data); |
---|
1097 | break; |
---|
1098 | |
---|
1099 | case _C_UINT: |
---|
1100 | return objc_read_unsigned_int (stream, (unsigned int*)data); |
---|
1101 | break; |
---|
1102 | |
---|
1103 | case _C_LNG: |
---|
1104 | return objc_read_long (stream, (long*)data); |
---|
1105 | break; |
---|
1106 | |
---|
1107 | case _C_ULNG: |
---|
1108 | return objc_read_unsigned_long (stream, (unsigned long*)data); |
---|
1109 | break; |
---|
1110 | |
---|
1111 | case _C_CHARPTR: |
---|
1112 | case _C_ATOM: |
---|
1113 | return objc_read_string (stream, (char**)data); |
---|
1114 | break; |
---|
1115 | |
---|
1116 | case _C_ARY_B: |
---|
1117 | { |
---|
1118 | int len = atoi(type+1); |
---|
1119 | while (isdigit(*++type)); |
---|
1120 | return objc_read_array (stream, type, len, data); |
---|
1121 | } |
---|
1122 | break; |
---|
1123 | |
---|
1124 | case _C_STRUCT_B: |
---|
1125 | { |
---|
1126 | int acc_size = 0; |
---|
1127 | int align; |
---|
1128 | while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */ |
---|
1129 | while (*type != _C_STRUCT_E); |
---|
1130 | { |
---|
1131 | align = objc_alignof_type (type); /* padd to alignment */ |
---|
1132 | acc_size += ROUND (acc_size, align); |
---|
1133 | objc_read_type (stream, type, ((char*)data)+acc_size); |
---|
1134 | acc_size += objc_sizeof_type (type); /* add component size */ |
---|
1135 | type = objc_skip_typespec (type); /* skip component */ |
---|
1136 | } |
---|
1137 | return 1; |
---|
1138 | } |
---|
1139 | |
---|
1140 | default: |
---|
1141 | fprintf(stderr, "objc_read_type: cannot parse typespec: %s\n", type); |
---|
1142 | abort(); |
---|
1143 | } |
---|
1144 | } |
---|
1145 | |
---|
1146 | /* |
---|
1147 | ** Write the object specified by the template TYPE to STREAM. Last |
---|
1148 | ** arguments specify addresses of values to be written. It might |
---|
1149 | ** seem surprising to specify values by address, but this is extremely |
---|
1150 | ** convenient for copy-paste with objc_read_types calls. A more |
---|
1151 | ** down-to-the-earth cause for this passing of addresses is that values |
---|
1152 | ** of arbitrary size is not well supported in ANSI C for functions with |
---|
1153 | ** variable number of arguments. |
---|
1154 | */ |
---|
1155 | |
---|
1156 | int |
---|
1157 | objc_write_types (TypedStream* stream, const char* type, ...) |
---|
1158 | { |
---|
1159 | va_list args; |
---|
1160 | const char *c; |
---|
1161 | int res = 0; |
---|
1162 | |
---|
1163 | va_start(args, type); |
---|
1164 | |
---|
1165 | for (c = type; *c; c = objc_skip_typespec (c)) |
---|
1166 | { |
---|
1167 | switch(*c) { |
---|
1168 | case _C_ID: |
---|
1169 | res = objc_write_object (stream, *va_arg (args, id*)); |
---|
1170 | break; |
---|
1171 | |
---|
1172 | case _C_CLASS: |
---|
1173 | res = objc_write_class (stream, *va_arg(args, Class*)); |
---|
1174 | break; |
---|
1175 | |
---|
1176 | case _C_SEL: |
---|
1177 | res = objc_write_selector (stream, *va_arg(args, SEL*)); |
---|
1178 | break; |
---|
1179 | |
---|
1180 | case _C_CHR: |
---|
1181 | res = objc_write_char (stream, *va_arg (args, char*)); |
---|
1182 | break; |
---|
1183 | |
---|
1184 | case _C_UCHR: |
---|
1185 | res = objc_write_unsigned_char (stream, |
---|
1186 | *va_arg (args, unsigned char*)); |
---|
1187 | break; |
---|
1188 | |
---|
1189 | case _C_SHT: |
---|
1190 | res = objc_write_short (stream, *va_arg(args, short*)); |
---|
1191 | break; |
---|
1192 | |
---|
1193 | case _C_USHT: |
---|
1194 | res = objc_write_unsigned_short (stream, |
---|
1195 | *va_arg(args, unsigned short*)); |
---|
1196 | break; |
---|
1197 | |
---|
1198 | case _C_INT: |
---|
1199 | res = objc_write_int(stream, *va_arg(args, int*)); |
---|
1200 | break; |
---|
1201 | |
---|
1202 | case _C_UINT: |
---|
1203 | res = objc_write_unsigned_int(stream, *va_arg(args, unsigned int*)); |
---|
1204 | break; |
---|
1205 | |
---|
1206 | case _C_LNG: |
---|
1207 | res = objc_write_long(stream, *va_arg(args, long*)); |
---|
1208 | break; |
---|
1209 | |
---|
1210 | case _C_ULNG: |
---|
1211 | res = objc_write_unsigned_long(stream, *va_arg(args, unsigned long*)); |
---|
1212 | break; |
---|
1213 | |
---|
1214 | case _C_CHARPTR: |
---|
1215 | { |
---|
1216 | char** str = va_arg(args, char**); |
---|
1217 | res = objc_write_string (stream, *str, strlen(*str)); |
---|
1218 | } |
---|
1219 | break; |
---|
1220 | |
---|
1221 | case _C_ATOM: |
---|
1222 | { |
---|
1223 | char** str = va_arg(args, char**); |
---|
1224 | res = objc_write_string_atomic (stream, *str, strlen(*str)); |
---|
1225 | } |
---|
1226 | break; |
---|
1227 | |
---|
1228 | case _C_ARY_B: |
---|
1229 | { |
---|
1230 | int len = atoi(c+1); |
---|
1231 | const char* t = c; |
---|
1232 | while (isdigit(*++t)); |
---|
1233 | res = objc_write_array (stream, t, len, va_arg(args, void*)); |
---|
1234 | t = objc_skip_typespec (t); |
---|
1235 | if (*t != _C_ARY_E) |
---|
1236 | __objc_fatal("expected `]', got: %s", t); |
---|
1237 | } |
---|
1238 | break; |
---|
1239 | |
---|
1240 | default: |
---|
1241 | fprintf(stderr, "objc_write_types: cannot parse typespec: %s\n", type); |
---|
1242 | abort(); |
---|
1243 | } |
---|
1244 | } |
---|
1245 | va_end(args); |
---|
1246 | return res; |
---|
1247 | } |
---|
1248 | |
---|
1249 | |
---|
1250 | /* |
---|
1251 | ** Last arguments specify addresses of values to be read. Expected |
---|
1252 | ** type is checked against the type actually present on the stream. |
---|
1253 | */ |
---|
1254 | |
---|
1255 | int |
---|
1256 | objc_read_types(TypedStream* stream, const char* type, ...) |
---|
1257 | { |
---|
1258 | va_list args; |
---|
1259 | const char *c; |
---|
1260 | int res = 0; |
---|
1261 | |
---|
1262 | va_start(args, type); |
---|
1263 | |
---|
1264 | for (c = type; *c; c = objc_skip_typespec(c)) |
---|
1265 | { |
---|
1266 | switch(*c) { |
---|
1267 | case _C_ID: |
---|
1268 | res = objc_read_object(stream, va_arg(args, id*)); |
---|
1269 | break; |
---|
1270 | |
---|
1271 | case _C_CLASS: |
---|
1272 | res = objc_read_class(stream, va_arg(args, Class*)); |
---|
1273 | break; |
---|
1274 | |
---|
1275 | case _C_SEL: |
---|
1276 | res = objc_read_selector(stream, va_arg(args, SEL*)); |
---|
1277 | break; |
---|
1278 | |
---|
1279 | case _C_CHR: |
---|
1280 | res = objc_read_char(stream, va_arg(args, char*)); |
---|
1281 | break; |
---|
1282 | |
---|
1283 | case _C_UCHR: |
---|
1284 | res = objc_read_unsigned_char(stream, va_arg(args, unsigned char*)); |
---|
1285 | break; |
---|
1286 | |
---|
1287 | case _C_SHT: |
---|
1288 | res = objc_read_short(stream, va_arg(args, short*)); |
---|
1289 | break; |
---|
1290 | |
---|
1291 | case _C_USHT: |
---|
1292 | res = objc_read_unsigned_short(stream, va_arg(args, unsigned short*)); |
---|
1293 | break; |
---|
1294 | |
---|
1295 | case _C_INT: |
---|
1296 | res = objc_read_int(stream, va_arg(args, int*)); |
---|
1297 | break; |
---|
1298 | |
---|
1299 | case _C_UINT: |
---|
1300 | res = objc_read_unsigned_int(stream, va_arg(args, unsigned int*)); |
---|
1301 | break; |
---|
1302 | |
---|
1303 | case _C_LNG: |
---|
1304 | res = objc_read_long(stream, va_arg(args, long*)); |
---|
1305 | break; |
---|
1306 | |
---|
1307 | case _C_ULNG: |
---|
1308 | res = objc_read_unsigned_long(stream, va_arg(args, unsigned long*)); |
---|
1309 | break; |
---|
1310 | |
---|
1311 | case _C_CHARPTR: |
---|
1312 | case _C_ATOM: |
---|
1313 | { |
---|
1314 | char** str = va_arg(args, char**); |
---|
1315 | res = objc_read_string (stream, str); |
---|
1316 | } |
---|
1317 | break; |
---|
1318 | |
---|
1319 | case _C_ARY_B: |
---|
1320 | { |
---|
1321 | int len = atoi(c+1); |
---|
1322 | const char* t = c; |
---|
1323 | while (isdigit(*++t)); |
---|
1324 | res = objc_read_array (stream, t, len, va_arg(args, void*)); |
---|
1325 | t = objc_skip_typespec (t); |
---|
1326 | if (*t != _C_ARY_E) |
---|
1327 | __objc_fatal("expected `]', got: %s", t); |
---|
1328 | } |
---|
1329 | break; |
---|
1330 | |
---|
1331 | default: |
---|
1332 | fprintf(stderr, "objc_read_types: cannot parse typespec: %s\n", type); |
---|
1333 | abort(); |
---|
1334 | } |
---|
1335 | } |
---|
1336 | va_end(args); |
---|
1337 | return res; |
---|
1338 | } |
---|
1339 | |
---|
1340 | /* |
---|
1341 | ** Write an array of COUNT elements of TYPE from the memory address DATA. |
---|
1342 | ** This is equivalent of objc_write_type (stream, "[N<type>]", data) |
---|
1343 | */ |
---|
1344 | |
---|
1345 | int |
---|
1346 | objc_write_array (TypedStream* stream, const char* type, |
---|
1347 | int count, const void* data) |
---|
1348 | { |
---|
1349 | int off = objc_sizeof_type(type); |
---|
1350 | const char* where = data; |
---|
1351 | |
---|
1352 | while (count-- > 0) |
---|
1353 | { |
---|
1354 | objc_write_type(stream, type, where); |
---|
1355 | where += off; |
---|
1356 | } |
---|
1357 | return 1; |
---|
1358 | } |
---|
1359 | |
---|
1360 | /* |
---|
1361 | ** Read an array of COUNT elements of TYPE into the memory address |
---|
1362 | ** DATA. The memory pointed to by data is supposed to be allocated |
---|
1363 | ** by the callee. This is equivalent of |
---|
1364 | ** objc_read_type (stream, "[N<type>]", data) |
---|
1365 | */ |
---|
1366 | |
---|
1367 | int |
---|
1368 | objc_read_array (TypedStream* stream, const char* type, |
---|
1369 | int count, void* data) |
---|
1370 | { |
---|
1371 | int off = objc_sizeof_type(type); |
---|
1372 | char* where = (char*)data; |
---|
1373 | |
---|
1374 | while (count-- > 0) |
---|
1375 | { |
---|
1376 | objc_read_type(stream, type, where); |
---|
1377 | where += off; |
---|
1378 | } |
---|
1379 | return 1; |
---|
1380 | } |
---|
1381 | |
---|
1382 | static void |
---|
1383 | __objc_free (void* p) |
---|
1384 | { |
---|
1385 | free (p); |
---|
1386 | } |
---|
1387 | |
---|
1388 | static int |
---|
1389 | __objc_fread(FILE* file, char* data, int len) |
---|
1390 | { |
---|
1391 | return fread(data, len, 1, file); |
---|
1392 | } |
---|
1393 | |
---|
1394 | static int |
---|
1395 | __objc_fwrite(FILE* file, char* data, int len) |
---|
1396 | { |
---|
1397 | return fwrite(data, len, 1, file); |
---|
1398 | } |
---|
1399 | |
---|
1400 | static int |
---|
1401 | __objc_feof(FILE* file) |
---|
1402 | { |
---|
1403 | return feof(file); |
---|
1404 | } |
---|
1405 | |
---|
1406 | static int |
---|
1407 | __objc_no_write(FILE* file, char* data, int len) |
---|
1408 | { |
---|
1409 | __objc_fatal ("TypedStream not open for writing"); |
---|
1410 | } |
---|
1411 | |
---|
1412 | static int |
---|
1413 | __objc_no_read(FILE* file, char* data, int len) |
---|
1414 | { |
---|
1415 | __objc_fatal ("TypedStream not open for reading"); |
---|
1416 | } |
---|
1417 | |
---|
1418 | static int |
---|
1419 | __objc_read_typed_stream_signature (TypedStream* stream) |
---|
1420 | { |
---|
1421 | char buffer[80]; |
---|
1422 | int pos = 0; |
---|
1423 | do |
---|
1424 | (*stream->read)(stream->physical, buffer+pos, 1); |
---|
1425 | while (buffer[pos++] != '\0'); |
---|
1426 | sscanf (buffer, "GNU TypedStream %d", &stream->version); |
---|
1427 | if (stream->version != OBJC_TYPED_STREAM_VERSION) |
---|
1428 | __objc_fatal ("cannot handle TypedStream version %d", stream->version); |
---|
1429 | return 1; |
---|
1430 | } |
---|
1431 | |
---|
1432 | static int |
---|
1433 | __objc_write_typed_stream_signature (TypedStream* stream) |
---|
1434 | { |
---|
1435 | char buffer[80]; |
---|
1436 | sprintf(buffer, "GNU TypedStream %d", OBJC_TYPED_STREAM_VERSION); |
---|
1437 | stream->version = OBJC_TYPED_STREAM_VERSION; |
---|
1438 | (*stream->write)(stream->physical, buffer, strlen(buffer)+1); |
---|
1439 | return 1; |
---|
1440 | } |
---|
1441 | |
---|
1442 | static void __objc_finish_write_root_object(struct objc_typed_stream* stream) |
---|
1443 | { |
---|
1444 | hash_delete (stream->object_table); |
---|
1445 | stream->object_table = hash_new(64, |
---|
1446 | (hash_func_type)hash_ptr, |
---|
1447 | (compare_func_type)compare_ptrs); |
---|
1448 | } |
---|
1449 | |
---|
1450 | static void __objc_finish_read_root_object(struct objc_typed_stream* stream) |
---|
1451 | { |
---|
1452 | node_ptr node; |
---|
1453 | struct objc_list* free_list; |
---|
1454 | SEL awake_sel = sel_get_any_uid ("awake"); |
---|
1455 | |
---|
1456 | /* resolve object forward references */ |
---|
1457 | free_list = list_cons(NULL, NULL); |
---|
1458 | for (node = hash_next (stream->object_refs, NULL); node; |
---|
1459 | node = hash_next (stream->object_refs, node)) |
---|
1460 | { |
---|
1461 | struct objc_list* reflist = node->value; |
---|
1462 | const void* key = node->key; |
---|
1463 | id object = hash_value_for_key (stream->object_table, key); |
---|
1464 | while(reflist) |
---|
1465 | { |
---|
1466 | *((id*)reflist->head) = object; |
---|
1467 | if (list_find(&free_list, reflist) == NULL) |
---|
1468 | free_list = list_cons (reflist, free_list); |
---|
1469 | reflist = reflist->tail; |
---|
1470 | } |
---|
1471 | } |
---|
1472 | list_mapcar (free_list, __objc_free); |
---|
1473 | list_free (free_list); |
---|
1474 | |
---|
1475 | /* empty object reference table */ |
---|
1476 | hash_delete (stream->object_refs); |
---|
1477 | stream->object_refs = hash_new(8, (hash_func_type)hash_ptr, |
---|
1478 | (compare_func_type)compare_ptrs); |
---|
1479 | |
---|
1480 | /* call -awake for all objects read */ |
---|
1481 | if (awake_sel) |
---|
1482 | { |
---|
1483 | for (node = hash_next (stream->object_table, NULL); node; |
---|
1484 | node = hash_next (stream->object_table, node)) |
---|
1485 | { |
---|
1486 | id object = node->value; |
---|
1487 | if (__objc_responds_to (object, awake_sel)) |
---|
1488 | (*objc_msg_lookup(object, awake_sel))(object, awake_sel); |
---|
1489 | } |
---|
1490 | } |
---|
1491 | |
---|
1492 | /* empty object table */ |
---|
1493 | hash_delete (stream->object_table); |
---|
1494 | stream->object_table = hash_new(64, |
---|
1495 | (hash_func_type)hash_ptr, |
---|
1496 | (compare_func_type)compare_ptrs); |
---|
1497 | } |
---|
1498 | |
---|
1499 | /* |
---|
1500 | ** Open the stream PHYSICAL in MODE |
---|
1501 | */ |
---|
1502 | |
---|
1503 | TypedStream* |
---|
1504 | objc_open_typed_stream (FILE* physical, int mode) |
---|
1505 | { |
---|
1506 | TypedStream* s = (TypedStream*)__objc_xmalloc(sizeof(TypedStream)); |
---|
1507 | |
---|
1508 | s->mode = mode; |
---|
1509 | s->physical = physical; |
---|
1510 | s->stream_table = hash_new(64, |
---|
1511 | (hash_func_type)hash_ptr, |
---|
1512 | (compare_func_type)compare_ptrs); |
---|
1513 | s->object_table = hash_new(64, |
---|
1514 | (hash_func_type)hash_ptr, |
---|
1515 | (compare_func_type)compare_ptrs); |
---|
1516 | s->eof = (objc_typed_eof_func)__objc_feof; |
---|
1517 | s->flush = (objc_typed_flush_func)fflush; |
---|
1518 | s->writing_root_p = 0; |
---|
1519 | if (mode == OBJC_READONLY) |
---|
1520 | { |
---|
1521 | s->class_table = hash_new(8, (hash_func_type)hash_string, |
---|
1522 | (compare_func_type)compare_strings); |
---|
1523 | s->object_refs = hash_new(8, (hash_func_type)hash_ptr, |
---|
1524 | (compare_func_type)compare_ptrs); |
---|
1525 | s->read = (objc_typed_read_func)__objc_fread; |
---|
1526 | s->write = (objc_typed_write_func)__objc_no_write; |
---|
1527 | __objc_read_typed_stream_signature (s); |
---|
1528 | } |
---|
1529 | else if (mode == OBJC_WRITEONLY) |
---|
1530 | { |
---|
1531 | s->class_table = 0; |
---|
1532 | s->object_refs = 0; |
---|
1533 | s->read = (objc_typed_read_func)__objc_no_read; |
---|
1534 | s->write = (objc_typed_write_func)__objc_fwrite; |
---|
1535 | __objc_write_typed_stream_signature (s); |
---|
1536 | } |
---|
1537 | else |
---|
1538 | { |
---|
1539 | objc_close_typed_stream (s); |
---|
1540 | return NULL; |
---|
1541 | } |
---|
1542 | s->type = OBJC_FILE_STREAM; |
---|
1543 | return s; |
---|
1544 | } |
---|
1545 | |
---|
1546 | /* |
---|
1547 | ** Open the file named by FILE_NAME in MODE |
---|
1548 | */ |
---|
1549 | |
---|
1550 | TypedStream* |
---|
1551 | objc_open_typed_stream_for_file (const char* file_name, int mode) |
---|
1552 | { |
---|
1553 | FILE* file = NULL; |
---|
1554 | TypedStream* s; |
---|
1555 | |
---|
1556 | if (mode == OBJC_READONLY) |
---|
1557 | file = fopen (file_name, "r"); |
---|
1558 | else |
---|
1559 | file = fopen (file_name, "w"); |
---|
1560 | |
---|
1561 | if (file) |
---|
1562 | { |
---|
1563 | s = objc_open_typed_stream (file, mode); |
---|
1564 | if (s) |
---|
1565 | s->type |= OBJC_MANAGED_STREAM; |
---|
1566 | return s; |
---|
1567 | } |
---|
1568 | else |
---|
1569 | return NULL; |
---|
1570 | } |
---|
1571 | |
---|
1572 | /* |
---|
1573 | ** Close STREAM freeing the structure it self. If it was opened with |
---|
1574 | ** objc_open_typed_stream_for_file, the file will also be closed. |
---|
1575 | */ |
---|
1576 | |
---|
1577 | void |
---|
1578 | objc_close_typed_stream (TypedStream* stream) |
---|
1579 | { |
---|
1580 | if (stream->mode == OBJC_READONLY) |
---|
1581 | { |
---|
1582 | __objc_finish_read_root_object (stream); /* Just in case... */ |
---|
1583 | hash_delete (stream->class_table); |
---|
1584 | hash_delete (stream->object_refs); |
---|
1585 | } |
---|
1586 | |
---|
1587 | hash_delete (stream->stream_table); |
---|
1588 | hash_delete (stream->object_table); |
---|
1589 | |
---|
1590 | if (stream->type == (OBJC_MANAGED_STREAM | OBJC_FILE_STREAM)) |
---|
1591 | fclose ((FILE*)stream->physical); |
---|
1592 | |
---|
1593 | free (stream); |
---|
1594 | } |
---|
1595 | |
---|
1596 | BOOL |
---|
1597 | objc_end_of_typed_stream (TypedStream* stream) |
---|
1598 | { |
---|
1599 | return (*stream->eof)(stream->physical); |
---|
1600 | } |
---|
1601 | |
---|
1602 | void |
---|
1603 | objc_flush_typed_stream (TypedStream* stream) |
---|
1604 | { |
---|
1605 | (*stream->flush)(stream->physical); |
---|
1606 | } |
---|
1607 | |
---|
1608 | long |
---|
1609 | objc_get_stream_class_version (TypedStream* stream, Class class) |
---|
1610 | { |
---|
1611 | if (stream->class_table) |
---|
1612 | return PTR2LONG(hash_value_for_key (stream->class_table, class->name)); |
---|
1613 | else |
---|
1614 | return class_get_version (class); |
---|
1615 | } |
---|
1616 | |
---|