| 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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