forked from xxq250/Nasal-Interpreter
658 lines
18 KiB
C++
658 lines
18 KiB
C++
#ifndef __NASAL_BYTECODE_VM_H__
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#define __NASAL_BYTECODE_VM_H__
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class nasal_bytecode_vm
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{
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private:
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int error;
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int ptr;
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int global_scope_addr;
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nasal_virtual_machine vm;
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std::vector<opcode> exec_code;
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std::stack<int> value_stack;
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std::stack<int> local_scope_stack;
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std::stack<int> slice_stack;
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std::stack<int> call_stack;
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std::vector<std::string> string_table;
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std::vector<double> number_table;
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std::vector<void (nasal_bytecode_vm::*)()> opr_table;
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std::map<std::string,int (*)(int x,nasal_virtual_machine& vm)> builtin_func_hashmap;
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void die(std::string);
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bool check_condition(int);
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void opr_nop();
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void opr_load();
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void opr_pushnum();
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void opr_pushone();
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void opr_pushzero();
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void opr_pushnil();
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void opr_pushstr();
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void opr_newvec();
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void opr_newhash();
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void opr_newfunc();
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void opr_vecapp();
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void opr_hashapp();
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void opr_para();
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void opr_defpara();
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void opr_dynpara();
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void opr_entry();
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void opr_unot();
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void opr_usub();
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void opr_add();
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void opr_sub();
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void opr_mul();
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void opr_div();
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void opr_lnk();
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void opr_addeq();
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void opr_subeq();
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void opr_muleq();
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void opr_diveq();
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void opr_lnkeq();
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void opr_meq();
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void opr_eq();
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void opr_neq();
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void opr_less();
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void opr_leq();
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void opr_grt();
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void opr_geq();
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void opr_pop();
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void opr_jmp();
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void opr_jmptrue();
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void opr_jmpfalse();
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void opr_forindex();
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void opr_foreach();
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void opr_call();
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void opr_callv();
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void opr_callvi();
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void opr_callh();
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void opr_callf();
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void opr_builtincall();
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void opr_slicebegin();
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void opr_sliceend();
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void opr_slice();
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void opr_slice2();
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void opr_mcall();
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void opr_mcallv();
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void opr_mcallh();
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void opr_return();
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public:
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nasal_bytecode_vm();
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~nasal_bytecode_vm();
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void clear();
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void set_string_table(std::vector<std::string>&);
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void set_number_table(std::vector<double>&);
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void set_exec_code(std::vector<opcode>&);
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void run();
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};
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nasal_bytecode_vm::nasal_bytecode_vm()
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{
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local_scope_stack.push(-1);
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struct
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{
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int op;
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void (nasal_bytecode_vm::*ptr)();
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}function_table[]=
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{
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{op_nop, nasal_bytecode_vm::opr_nop},
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{op_load, nasal_bytecode_vm::opr_load},
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{op_pushnum, nasal_bytecode_vm::opr_pushnum},
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{op_pushone, nasal_bytecode_vm::opr_pushone},
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{op_pushzero, nasal_bytecode_vm::opr_pushzero},
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{op_pushnil, nasal_bytecode_vm::opr_pushnil},
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{op_pushstr, nasal_bytecode_vm::opr_pushstr},
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{op_newvec, nasal_bytecode_vm::opr_newvec},
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{op_newhash, nasal_bytecode_vm::opr_newhash},
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{op_newfunc, nasal_bytecode_vm::opr_newfunc},
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{op_vecapp, nasal_bytecode_vm::opr_vecapp},
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{op_hashapp, nasal_bytecode_vm::opr_hashapp},
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{op_para, nasal_bytecode_vm::opr_para},
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{op_defpara, nasal_bytecode_vm::opr_defpara},
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{op_dynpara, nasal_bytecode_vm::opr_dynpara},
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{op_entry, nasal_bytecode_vm::opr_entry},
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{op_unot, nasal_bytecode_vm::opr_unot},
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{op_usub, nasal_bytecode_vm::opr_usub},
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{op_add, nasal_bytecode_vm::opr_add},
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{op_sub, nasal_bytecode_vm::opr_sub},
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{op_mul, nasal_bytecode_vm::opr_mul},
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{op_div, nasal_bytecode_vm::opr_div},
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{op_lnk, nasal_bytecode_vm::opr_lnk},
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{op_addeq, nasal_bytecode_vm::opr_addeq},
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{op_subeq, nasal_bytecode_vm::opr_subeq},
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{op_muleq, nasal_bytecode_vm::opr_muleq},
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{op_diveq, nasal_bytecode_vm::opr_diveq},
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{op_lnkeq, nasal_bytecode_vm::opr_lnkeq},
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{op_meq, nasal_bytecode_vm::opr_meq},
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{op_eq, nasal_bytecode_vm::opr_eq},
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{op_neq, nasal_bytecode_vm::opr_neq},
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{op_less, nasal_bytecode_vm::opr_less},
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{op_leq, nasal_bytecode_vm::opr_leq},
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{op_grt, nasal_bytecode_vm::opr_grt},
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{op_geq, nasal_bytecode_vm::opr_geq},
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{op_pop, nasal_bytecode_vm::opr_pop},
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{op_jmp, nasal_bytecode_vm::opr_jmp},
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{op_jmptrue, nasal_bytecode_vm::opr_jmptrue},
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{op_jmpfalse, nasal_bytecode_vm::opr_jmpfalse},
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{op_forindex, nasal_bytecode_vm::opr_forindex},
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{op_foreach, nasal_bytecode_vm::opr_foreach},
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{op_call, nasal_bytecode_vm::opr_call},
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{op_callv, nasal_bytecode_vm::opr_callv},
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{op_callvi, nasal_bytecode_vm::opr_callvi},
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{op_callh, nasal_bytecode_vm::opr_callh},
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{op_callf, nasal_bytecode_vm::opr_callf},
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{op_builtincall, nasal_bytecode_vm::opr_builtincall},
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{op_slicebegin, nasal_bytecode_vm::opr_slicebegin},
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{op_sliceend, nasal_bytecode_vm::opr_sliceend},
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{op_slice, nasal_bytecode_vm::opr_slice},
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{op_slice2, nasal_bytecode_vm::opr_slice2},
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{op_mcall, nasal_bytecode_vm::opr_mcall},
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{op_mcallv, nasal_bytecode_vm::opr_mcallv},
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{op_mcallh, nasal_bytecode_vm::opr_mcallh},
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{op_return, nasal_bytecode_vm::opr_return},
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{-1,NULL}
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};
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for(int i=0;function_table[i].ptr;++i)
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opr_table.push_back(NULL);
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for(int i=0;function_table[i].ptr;++i)
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opr_table[function_table[i].op]=function_table[i].ptr;
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for(int i=0;builtin_func_table[i].func_pointer;++i)
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builtin_func_hashmap[builtin_func_table[i].func_name]=builtin_func_table[i].func_pointer;
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return;
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}
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nasal_bytecode_vm::~nasal_bytecode_vm()
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{
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opr_table.clear();
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return;
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}
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void nasal_bytecode_vm::clear()
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{
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vm.clear();
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global_scope_addr=-1;
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while(!value_stack.empty())value_stack.pop();
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while(local_scope_stack.top()!=-1)local_scope_stack.pop();
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while(!slice_stack.empty())slice_stack.pop();
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while(!call_stack.empty())call_stack.pop();
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return;
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}
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void nasal_bytecode_vm::die(std::string str)
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{
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++error;
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std::cout<<">> [vm] "<<str<<'\n';
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return;
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}
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bool nasal_bytecode_vm::check_condition(int value_addr)
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{
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if(value_addr<0)
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return false;
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int type=vm.gc_get(value_addr).get_type();
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if(type==vm_nil || type==vm_vector || type==vm_hash || type==vm_function)
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return false;
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else if(type==vm_string)
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{
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std::string str=vm.gc_get(value_addr).get_string();
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double number=trans_string_to_number(str);
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if(std::isnan(number))
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return str.length()!=0;
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return (number!=0);
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}
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else if(type==vm_number)
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return (vm.gc_get(value_addr).get_number()!=0);
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return false;
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}
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void nasal_bytecode_vm::opr_nop()
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{
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return;
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}
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void nasal_bytecode_vm::opr_load()
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{
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int val_addr=value_stack.top();
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value_stack.pop();
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vm.gc_get(global_scope_addr).get_closure().add_new_value(string_table[exec_code[ptr].index],val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_pushnum()
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{
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int val_addr=vm.gc_alloc(vm_number);
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vm.gc_get(val_addr).set_number(number_table[exec_code[ptr].index]);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_pushone()
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{
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int val_addr=vm.gc_alloc(vm_number);
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vm.gc_get(val_addr).set_number(1);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_pushzero()
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{
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int val_addr=vm.gc_alloc(vm_number);
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vm.gc_get(val_addr).set_number(0);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_pushnil()
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{
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int val_addr=vm.gc_alloc(vm_nil);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_pushstr()
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{
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int val_addr=vm.gc_alloc(vm_string);
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vm.gc_get(val_addr).set_string(string_table[exec_code[ptr].index]);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_newvec()
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{
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int val_addr=vm.gc_alloc(vm_vector);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_newhash()
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{
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int val_addr=vm.gc_alloc(vm_hash);
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_newfunc()
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{
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int val_addr=vm.gc_alloc(vm_function);
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if(local_scope_stack.top()>=0)
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vm.gc_get(val_addr).get_func().set_closure_addr(local_scope_stack.top());
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else
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{
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int tmp_closure=vm.gc_alloc(vm_closure);
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vm.gc_get(val_addr).get_func().set_closure_addr(tmp_closure);
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vm.del_reference(tmp_closure);
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}
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// unfinished
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value_stack.push(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_vecapp()
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{
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int val_addr=value_stack.top();
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value_stack.pop();
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vm.gc_get(value_stack.top()).get_vector().add_elem(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_hashapp()
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{
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int val_addr=value_stack.top();
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value_stack.pop();
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int str_addr=value_stack.top();
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value_stack.pop();
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int hash_addr=value_stack.top();
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vm.gc_get(hash_addr).get_hash().add_elem(vm.gc_get(str_addr).get_string(),val_addr);
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vm.del_reference(str_addr);
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return;
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}
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void nasal_bytecode_vm::opr_para(){return;}
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void nasal_bytecode_vm::opr_defpara(){return;}
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void nasal_bytecode_vm::opr_dynpara(){return;}
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void nasal_bytecode_vm::opr_entry()
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{
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vm.gc_get(value_stack.top()).get_func().set_entry(exec_code[ptr].index);
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return;
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}
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void nasal_bytecode_vm::opr_unot()
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{
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int val_addr=value_stack.top();
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value_stack.pop();
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if(val_addr<0)
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{
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die("unot: memory returned an invalid address");
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return;
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}
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nasal_scalar& ref=vm.gc_get(val_addr);
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int type=ref.get_type();
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int new_value_address=-1;
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if(type==vm_nil)
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{
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new_value_address=vm.gc_alloc(vm_number);
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vm.gc_get(new_value_address).set_number(1);
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}
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else if(type==vm_number)
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{
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double number=(ref.get_number()==0);
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new_value_address=vm.gc_alloc(vm_number);
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vm.gc_get(new_value_address).set_number(number);
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}
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else if(type==vm_string)
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{
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double number=trans_string_to_number(ref.get_string());
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if(std::isnan(number))
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{
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new_value_address=vm.gc_alloc(vm_number);
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vm.gc_get(new_value_address).set_number(!(ref.get_string()).length());
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}
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else
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{
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new_value_address=vm.gc_alloc(vm_number);
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vm.gc_get(new_value_address).set_number((double)(number==0));
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}
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}
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else
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die("unot: error value type");
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value_stack.push(new_value_address);
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vm.del_reference(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_usub()
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{
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int val_addr=value_stack.top();
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value_stack.pop();
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if(val_addr<0)
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{
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die("usub: memory returned an invalid address");
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return;
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}
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nasal_scalar& ref=vm.gc_get(val_addr);
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int type=ref.get_type();
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double num=(1/0.0)+(-1/0.0);
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if(type==vm_number)
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num=ref.get_number();
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else if(type==vm_string)
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num=trans_string_to_number(ref.get_string());
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int new_value_address=vm.gc_alloc(vm_number);
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vm.gc_get(new_value_address).set_number(-num);
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value_stack.push(new_value_address);
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vm.del_reference(val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_add()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_sub()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_mul()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_div()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_lnk()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_addeq(){return;}
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void nasal_bytecode_vm::opr_subeq(){return;}
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void nasal_bytecode_vm::opr_muleq(){return;}
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void nasal_bytecode_vm::opr_diveq(){return;}
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void nasal_bytecode_vm::opr_lnkeq(){return;}
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void nasal_bytecode_vm::opr_meq()
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{
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int mem_addr=value_stack.top();
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value_stack.pop();
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int val_addr=value_stack.top();
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vm.add_reference(val_addr);
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vm.mem_change(mem_addr,val_addr);
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return;
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}
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void nasal_bytecode_vm::opr_eq()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_neq()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_less()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
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value_stack.pop();
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vm.del_reference(val_addr1);
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vm.del_reference(val_addr2);
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return;
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}
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void nasal_bytecode_vm::opr_leq()
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{
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int val_addr2=value_stack.top();
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value_stack.pop();
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int val_addr1=value_stack.top();
|
|
value_stack.pop();
|
|
|
|
vm.del_reference(val_addr1);
|
|
vm.del_reference(val_addr2);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_grt()
|
|
{
|
|
int val_addr2=value_stack.top();
|
|
value_stack.pop();
|
|
int val_addr1=value_stack.top();
|
|
value_stack.pop();
|
|
|
|
vm.del_reference(val_addr1);
|
|
vm.del_reference(val_addr2);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_geq()
|
|
{
|
|
int val_addr2=value_stack.top();
|
|
value_stack.pop();
|
|
int val_addr1=value_stack.top();
|
|
value_stack.pop();
|
|
|
|
vm.del_reference(val_addr1);
|
|
vm.del_reference(val_addr2);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_pop()
|
|
{
|
|
int val_addr=value_stack.top();
|
|
value_stack.pop();
|
|
vm.del_reference(val_addr);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_jmp()
|
|
{
|
|
ptr=exec_code[ptr].index-1;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_jmptrue()
|
|
{
|
|
if(check_condition(value_stack.top()))
|
|
ptr=exec_code[ptr].index-1;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_jmpfalse()
|
|
{
|
|
if(!check_condition(value_stack.top()))
|
|
ptr=exec_code[ptr].index-1;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_forindex(){return;}
|
|
void nasal_bytecode_vm::opr_foreach(){return;}
|
|
void nasal_bytecode_vm::opr_call(){return;}
|
|
void nasal_bytecode_vm::opr_callv(){return;}
|
|
void nasal_bytecode_vm::opr_callvi(){return;}
|
|
void nasal_bytecode_vm::opr_callh(){return;}
|
|
void nasal_bytecode_vm::opr_callf()
|
|
{
|
|
int para_addr=value_stack.top();
|
|
value_stack.pop();
|
|
int func_addr=value_stack.top();
|
|
if(vm.gc_get(func_addr).get_type()!=vm_function)
|
|
{
|
|
die("called a value that is not a function");
|
|
return;
|
|
}
|
|
// unfinished
|
|
call_stack.push(ptr);
|
|
ptr=vm.gc_get(func_addr).get_func().get_entry()-1;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_builtincall()
|
|
{
|
|
int ret_value_addr=-1;
|
|
std::string val_name=string_table[exec_code[ptr].index];
|
|
if(builtin_func_hashmap.find(val_name)!=builtin_func_hashmap.end())
|
|
{
|
|
ret_value_addr=(*builtin_func_hashmap[val_name])(local_scope_stack.top(),vm);
|
|
error+=builtin_die_state;
|
|
}
|
|
value_stack.push(ret_value_addr);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_slicebegin()
|
|
{
|
|
int val_addr=vm.gc_alloc(vm_vector);
|
|
slice_stack.push(val_addr);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_sliceend()
|
|
{
|
|
int val_addr=slice_stack.top();
|
|
slice_stack.pop();
|
|
value_stack.push(val_addr);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_slice()
|
|
{
|
|
int val_addr=value_stack.top();
|
|
value_stack.pop();
|
|
int type=vm.gc_get(val_addr).get_type();
|
|
// unfinished
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_slice2(){return;}
|
|
void nasal_bytecode_vm::opr_mcall()
|
|
{
|
|
int mem_addr=-1;
|
|
if(local_scope_stack.top()>=0)
|
|
vm.gc_get(local_scope_stack.top()).get_closure().get_mem_address(string_table[exec_code[ptr].index]);
|
|
else
|
|
vm.gc_get(global_scope_addr).get_closure().get_mem_address(string_table[exec_code[ptr].index]);
|
|
if(mem_addr<0)
|
|
die("cannot find symbol named \""+string_table[exec_code[ptr].index]+"\"");
|
|
value_stack.push(mem_addr);
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_mcallv()
|
|
{
|
|
int val_addr=value_stack.top();
|
|
value_stack.pop();
|
|
int vec_addr=vm.mem_get(value_stack.top());
|
|
value_stack.pop();
|
|
// unfinished
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_mcallh()
|
|
{
|
|
int val_addr=value_stack.top();
|
|
value_stack.pop();
|
|
int hash_addr=vm.mem_get(value_stack.top());
|
|
value_stack.pop();
|
|
if(vm.gc_get(hash_addr).get_type()!=vm_hash)
|
|
die("must call a hash");
|
|
else
|
|
value_stack.push(vm.gc_get(hash_addr).get_hash().get_mem_address(vm.gc_get(val_addr).get_string()));
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::opr_return()
|
|
{
|
|
int closure_addr=local_scope_stack.top();
|
|
local_scope_stack.pop();
|
|
vm.gc_get(closure_addr).get_closure().del_scope();
|
|
vm.del_reference(closure_addr);
|
|
ptr=call_stack.top();
|
|
call_stack.pop();
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::set_string_table(std::vector<std::string>& table)
|
|
{
|
|
string_table=table;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::set_number_table(std::vector<double>& table)
|
|
{
|
|
number_table=table;
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::set_exec_code(std::vector<opcode>& exec)
|
|
{
|
|
int size=exec.size();
|
|
for(int i=0;i<size;++i)
|
|
{
|
|
opcode tmp;
|
|
tmp=exec[i];
|
|
exec_code.push_back(tmp);
|
|
}
|
|
return;
|
|
}
|
|
void nasal_bytecode_vm::run()
|
|
{
|
|
error=0;
|
|
global_scope_addr=vm.gc_alloc(vm_closure);
|
|
int size=exec_code.size();
|
|
for(ptr=0;ptr<size;++ptr)
|
|
{
|
|
(this->*opr_table[exec_code[ptr].op])();
|
|
if(error)
|
|
break;
|
|
}
|
|
vm.del_reference(global_scope_addr);
|
|
clear();
|
|
return;
|
|
}
|
|
#endif |