1 | // ================================================================ |
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2 | /* */ |
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3 | // File : aisc_mix.c |
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4 | // Purpose : |
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5 | /* */ |
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6 | // Institute of Microbiology (Technical University Munich) |
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7 | // http://www.arb-home.de/ |
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8 | /* */ |
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9 | // ================================================================ |
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10 | |
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11 | #include "aisc_interpreter.h" |
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12 | |
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13 | static Code *aisc_calc_blocks(Code * co, Code * afor, Code * aif, int up) { |
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14 | Code *oif; |
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15 | Code *ofor; |
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16 | Code *aelse; |
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17 | Code *anext; |
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18 | |
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19 | while (co) { |
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20 | while (co && (!co->command)) { |
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21 | co->IF = aif; |
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22 | co->FOR = afor; |
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23 | co = co->next; |
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24 | } |
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25 | if (!co) return NULp; |
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26 | co->IF = aif; |
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27 | co->FOR = afor; |
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28 | switch (co->command) { |
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29 | case CT_NEXT: |
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30 | if (!co->FOR) print_error(co, "NEXT without FOR"); |
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31 | return co; |
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32 | case CT_ENDFOR: |
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33 | if (!co->FOR) print_error(co, "ENDFOR without FOR"); |
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34 | return co; |
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35 | case CT_ELSE: |
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36 | if (!co->IF) print_error(co, "ELSE without IF"); |
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37 | return co; |
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38 | case CT_ELSEIF: |
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39 | if (!co->IF) print_error(co, "ELSEIF without IF"); |
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40 | return co; |
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41 | case CT_ENDIF: |
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42 | if (!co->IF) print_error(co, "ENDIF without IF"); |
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43 | return co; |
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44 | |
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45 | case CT_IF: |
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46 | oif = aif; |
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47 | aif = co; |
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48 | co = aisc_calc_blocks(co->next, afor, aif, 0); |
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49 | if (!co) { |
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50 | print_error(aif, "IF without ELSE or ENDIF"); |
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51 | return NULp; |
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52 | } |
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53 | if (co->command == CT_ELSE) { |
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54 | aif->ELSE=co; |
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55 | aelse = co; |
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56 | co = aisc_calc_blocks(co->next, afor, aif, 0); |
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57 | if (!co) { |
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58 | print_error(aif, "ELSE without ENDIF"); |
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59 | return NULp; |
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60 | } |
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61 | if (co->command!=CT_ENDIF) { |
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62 | print_error(aif, "ELSE without ENDIF"); |
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63 | print_error(co, "<detected here>"); |
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64 | return NULp; |
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65 | } |
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66 | aif->ENDIF=co; |
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67 | aelse->ENDIF=co; |
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68 | if (up) return co; |
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69 | } |
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70 | else if (co->command == CT_ELSEIF) { |
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71 | Code *co_if = new Code(*co); |
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72 | co_if->command = CT_IF; // when jumped to (from prev failed IF, act like IF) |
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73 | co->command = CT_ELSE; // when running into, act like else |
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74 | co ->next = co_if; |
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75 | freenull(co->str); |
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76 | aif->ELSE = co; |
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77 | aelse = co; |
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78 | co = aisc_calc_blocks(co_if, afor, aif, 1); |
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79 | if (!co) { |
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80 | print_error(aif->ELSE, "ELSEIF without ENDIF or ELSE"); |
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81 | return NULp; |
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82 | } |
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83 | if (co->command!=CT_ENDIF) { |
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84 | print_error(aif->ELSE, "ELSEIF without ENDIF"); |
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85 | print_error(co, "<detected here>"); |
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86 | return NULp; |
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87 | } |
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88 | aif->ENDIF = co; |
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89 | co_if->ENDIF = co; |
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90 | aelse->ENDIF = co; |
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91 | if (up) return co; |
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92 | } |
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93 | else if (co->command == CT_ENDIF) { |
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94 | aif->ELSE = co; |
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95 | aif->ENDIF = co; |
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96 | if (up) return co; |
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97 | } |
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98 | else { |
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99 | print_error(aif, "IF without ELSE or ENDIF"); |
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100 | print_error(co, "<detected here>"); |
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101 | return NULp; |
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102 | } |
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103 | aif = oif; |
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104 | break; |
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105 | case CT_FOR: |
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106 | ofor = afor; |
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107 | afor = co; |
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108 | co = aisc_calc_blocks(co->next, afor, aif, 0); |
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109 | if (!co) { |
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110 | print_error(afor, "FOR without NEXT or ENDFOR"); |
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111 | return NULp; |
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112 | } |
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113 | if (co->command == CT_NEXT) { |
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114 | afor->NEXT=co; |
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115 | anext = co; |
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116 | co = aisc_calc_blocks(co->next, afor, aif, 0); |
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117 | if (!co) { |
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118 | print_error(afor->NEXT, "NEXT without ENDFOR"); |
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119 | return NULp; |
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120 | } |
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121 | if (co->command!=CT_ENDFOR) { |
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122 | print_error(afor->NEXT, "NEXT without ENDFOR"); |
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123 | print_error(co, "<detected here>"); |
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124 | return NULp; |
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125 | } |
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126 | afor->ENDFOR = co; |
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127 | anext->ENDFOR = co; |
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128 | |
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129 | } |
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130 | else if (co->command == CT_ENDFOR) { |
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131 | afor->ENDFOR = co; |
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132 | afor->NEXT = co; |
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133 | co->command = CT_NEXT; |
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134 | } |
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135 | else { |
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136 | print_error(afor, "FOR without NEXT or ENDFOR"); |
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137 | print_error(co, "<detected here>"); |
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138 | return NULp; |
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139 | } |
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140 | afor = ofor; |
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141 | break; |
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142 | default: |
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143 | break; |
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144 | |
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145 | } |
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146 | co = co->next; |
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147 | } |
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148 | return NULp; |
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149 | } |
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150 | |
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151 | int Interpreter::compile_program() { |
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152 | for (Code *co=prg; co; co=co->next) { |
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153 | if (!strncmp(co->str, "IF", 2)) { co->set_command(CT_IF, co->str+2); continue; } |
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154 | if (!strncmp(co->str, "ELSEIF", 6)) { co->set_command(CT_ELSEIF, co->str+6); continue; } |
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155 | if (!strncmp(co->str, "ELSE", 4)) { co->set_command(CT_ELSE, co->str+4); continue; } |
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156 | if (!strncmp(co->str, "ENDIF", 5)) { co->set_command(CT_ENDIF, co->str+5); continue; } |
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157 | if (!strncmp(co->str, "FOR", 3)) { co->set_command(CT_FOR, co->str+3); continue; } |
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158 | if (!strncmp(co->str, "ENDFOR", 6)) { co->set_command(CT_ENDFOR, co->str+6); continue; } |
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159 | if (!strncmp(co->str, "NEXT", 4)) { co->set_command(CT_NEXT, co->str+4); continue; } |
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160 | |
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161 | if (!strncmp(co->str, "LABEL", 5)) { |
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162 | co->set_command(CT_LABEL, co->str+5); |
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163 | define_fun(co->str, co); |
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164 | continue; |
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165 | } |
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166 | if (!strncmp(co->str, "FUNCTION", 8)) { |
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167 | char *buf1, *buf2; |
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168 | char *s, *s2; |
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169 | buf1 = co->str+8; |
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170 | co->command = CT_FUNCTION; |
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171 | SKIP_SPACE_LF(buf1); |
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172 | for (s=buf1; !is_SPACE_SEP_LF_EOS(*s); s++) ; |
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173 | if (*s) { |
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174 | *s = 0; |
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175 | s++; |
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176 | SKIP_SPACE_LF(s); |
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177 | s2 = strdup(s); |
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178 | } |
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179 | else { |
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180 | s2 = strdup(""); |
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181 | } |
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182 | buf2 = strdup(buf1); |
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183 | free(co->str); |
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184 | co->str = s2; |
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185 | define_fun(buf2, co); |
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186 | free(buf2); |
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187 | continue; |
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188 | } |
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189 | |
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190 | co->command = CT_OTHER_CMD; |
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191 | co->cmd = find_command(co); |
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192 | } |
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193 | |
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194 | Code *co = aisc_calc_blocks(prg, NULp, NULp, 0); |
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195 | if (co) { |
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196 | print_error(co, "program is not well formed"); |
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197 | } |
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198 | |
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199 | return 0; |
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200 | } |
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201 | |
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202 | // ------------- |
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203 | // hash |
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204 | |
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205 | hash::hash(int size_) { |
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206 | size = size_; |
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207 | entries = (hash_entry **)calloc(sizeof(hash_entry *), size); |
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208 | } |
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209 | hash::~hash() { |
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210 | for (int i = 0; i<size; ++i) { |
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211 | hash_entry *enext; |
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212 | for (hash_entry *e=entries[i]; e; e=enext) { |
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213 | if (e->val) free(e->val); |
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214 | free(e->key); |
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215 | enext = e->next; |
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216 | free(e); |
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217 | } |
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218 | } |
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219 | free(entries); |
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220 | } |
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221 | |
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222 | int hash::Index(const char *key) const { |
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223 | const char *p = key; |
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224 | int x = 1; |
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225 | char c; |
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226 | |
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227 | while ((c=*(p++))) { |
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228 | x = (((x & 0x7fff)<<1) | ((x & 0x8000)>>15)) ^ c; |
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229 | } |
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230 | x %= size; |
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231 | if (x<0) x += size; |
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232 | return x; |
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233 | } |
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234 | |
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235 | const hash_entry *hash::find_entry(const char *key, int idx) const { |
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236 | for (hash_entry *e = entries[idx]; e; e=e->next) { |
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237 | if (!strcmp(e->key, key)) return e; |
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238 | } |
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239 | return NULp; |
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240 | } |
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241 | |
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242 | void hash::write(const char *key, const char *val) { |
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243 | int idx = Index(key); |
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244 | hash_entry *e = find_entry(key, idx); |
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245 | if (e) { |
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246 | freeset(e->val, nulldup(val)); |
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247 | } |
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248 | else { |
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249 | e = (hash_entry *)calloc(sizeof(hash_entry), 1); |
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250 | e->next = entries[idx]; |
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251 | e->key = strdup(key); |
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252 | e->val = val ? strdup(val) : NULp; |
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253 | |
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254 | entries[idx] = e; |
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255 | } |
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256 | } |
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257 | |
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258 | var_ref Interpreter::get_local(const char *key) { |
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259 | var_ref ref; |
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260 | for (Stack *s = stack; s && !ref; s = s->next) { |
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261 | ref = s->hs->ref(key); |
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262 | } |
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263 | return ref; |
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264 | } |
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265 | |
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266 | const char *Interpreter::read_local(const char *key) const { |
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267 | const var_ref local = const_cast<Interpreter*>(this)->get_local(key); |
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268 | return local.read(); |
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269 | } |
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270 | |
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