forked from xxq250/Nasal-Interpreter
613 lines
16 KiB
C++
613 lines
16 KiB
C++
#ifndef __NASAL_CODEGEN_H__
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#define __NASAL_CODEGEN_H__
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enum op_code
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{
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op_nop,
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op_load,
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op_loadv,
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op_pushnum,
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op_pushone,
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op_pushzero,
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op_pushnil,
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op_pushstr,
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op_newvec,op_newhash,op_newfunc,
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op_vecapp,op_hashapp,
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op_para,op_defpara,op_dynpara,op_entry,
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op_unot,op_usub,
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op_add,op_sub,op_mul,op_div,op_lnk,
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op_eq,op_neq,op_less,op_leq,op_grt,op_geq,
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op_pop,
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op_jmp,op_jmptrue,op_jmpfalse,
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op_call,op_callv,op_callh,op_callf,op_builtincall,
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op_slicebegin,op_sliceend,
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op_slice,op_slice2,
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op_mcall,op_mcallv,op_mcallh,
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op_return,
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op_end
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};
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struct
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{
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int type;
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const char* name;
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}code_table[]=
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{
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{op_nop, "nop "},
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{op_load, "load "},
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{op_loadv, "loadv "},
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{op_pushnum, "pnum "},
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{op_pushone, "pone "},
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{op_pushzero, "pzero "},
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{op_pushnil, "pnil "},
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{op_pushstr, "pstr "},
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{op_newvec, "newv "},
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{op_newhash, "newh "},
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{op_newfunc, "newf "},
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{op_vecapp, "vapp "},
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{op_hashapp, "happ "},
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{op_para, "para "},
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{op_defpara, "deflt "},
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{op_dynpara, "dyn "},
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{op_entry, "entry "},
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{op_unot, "not "},
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{op_usub, "usub "},
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{op_add, "add "},
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{op_sub, "sub "},
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{op_mul, "mult "},
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{op_div, "div "},
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{op_lnk, "link "},
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{op_eq, "eq "},
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{op_neq, "neq "},
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{op_less, "l "},
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{op_leq, "leq "},
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{op_grt, "g "},
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{op_geq, "geq "},
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{op_pop, "pop "},
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{op_jmp, "jmp "},
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{op_jmptrue, "jt "},
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{op_jmpfalse, "jf "},
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{op_call, "call "},
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{op_callv, "callv "},
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{op_callh, "callh "},
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{op_callf, "callf "},
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{op_builtincall, "callb "},
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{op_slicebegin, "slcbeg"},
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{op_sliceend, "slcend"},
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{op_slice, "slc "},
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{op_slice2, "slc2 "},
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{op_mcall, "mcall "},
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{op_mcallv, "mcallv"},
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{op_mcallh, "mcallh"},
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{op_return, "ret "},
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{op_end, "end "},
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{-1, NULL},
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};
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struct opcode
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{
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unsigned char op;
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unsigned int index;
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opcode(){op=op_nop;index=0;}
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};
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// unfinished
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// now it can output ast but it is not byte code yet
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// please wait...
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class nasal_codegen
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{
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private:
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std::map<double,int> number_table;
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std::map<std::string,int> string_table;
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std::vector<double> number_result_table;
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std::vector<std::string> string_result_table;
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std::vector<opcode> exec_code;
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int error;
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void regist_number(double);
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void regist_string(std::string);
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void nil_gen();
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void number_gen(nasal_ast&);
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void string_gen(nasal_ast&);
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void vector_gen(nasal_ast&);
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void hash_gen(nasal_ast&);
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void function_gen(nasal_ast&);
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void call_gen(nasal_ast&);
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void call_id(nasal_ast&);
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void multi_def(nasal_ast&);
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void single_def(nasal_ast&);
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void definition_gen(nasal_ast&);
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void multi_assignment_gen(nasal_ast&);
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void conditional_gen(nasal_ast&);
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void loop_gen(nasal_ast&);
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void calculation_gen(nasal_ast&);
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int block_gen(nasal_ast&);
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void return_gen(nasal_ast&);
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public:
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nasal_codegen();
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void main_progress(nasal_ast&);
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void print_op(int);
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void print_byte_code();
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};
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nasal_codegen::nasal_codegen()
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{
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error=0;
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return;
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}
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void nasal_codegen::regist_number(double num)
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{
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int size=number_table.size();
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if(number_table.find(num)==number_table.end())
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number_table[num]=size;
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return;
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}
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void nasal_codegen::regist_string(std::string str)
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{
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int size=string_table.size();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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return;
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}
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void nasal_codegen::nil_gen()
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{
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opcode op;
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op.op=op_pushnil;
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::number_gen(nasal_ast& ast)
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{
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double num=ast.get_num();
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regist_number(num);
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opcode op;
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if(num==1)
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op.op=op_pushone;
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else if(num==0)
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op.op=op_pushzero;
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else
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{
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op.op=op_pushnum;
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op.index=number_table[num];
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}
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::string_gen(nasal_ast& ast)
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{
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std::string str=ast.get_str();
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regist_string(str);
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opcode op;
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op.op=op_pushstr;
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op.index=string_table[str];
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::vector_gen(nasal_ast& ast)
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{
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int size=ast.get_children().size();
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opcode op;
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op.op=op_newvec;
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op.index=0;
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exec_code.push_back(op);
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for(int i=0;i<size;++i)
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{
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calculation_gen(ast.get_children()[i]);
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opcode tmp;
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tmp.op=op_vecapp;
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tmp.index=0;
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exec_code.push_back(tmp);
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}
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return;
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}
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void nasal_codegen::hash_gen(nasal_ast& ast)
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{
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int size=ast.get_children().size();
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opcode op;
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op.op=op_newhash;
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op.index=0;
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exec_code.push_back(op);
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for(int i=0;i<size;++i)
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{
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string_gen(ast.get_children()[i].get_children()[0]);
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calculation_gen(ast.get_children()[i].get_children()[1]);
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op.op=op_hashapp;
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op.index=0;
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exec_code.push_back(op);
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}
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return;
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}
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void nasal_codegen::function_gen(nasal_ast& ast)
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{
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opcode op;
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op.op=op_newfunc;
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op.index=0;
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exec_code.push_back(op);
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nasal_ast& ref_arg=ast.get_children()[0];
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int arg_size=ref_arg.get_children().size();
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for(int i=0;i<arg_size;++i)
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{
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nasal_ast& tmp=ref_arg.get_children()[i];
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if(tmp.get_type()==ast_identifier)
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{
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std::string str=tmp.get_str();
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regist_string(str);
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opcode tmp;
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tmp.op=op_para;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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else if(tmp.get_type()==ast_default_arg)
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{
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calculation_gen(tmp.get_children()[1]);
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std::string str=tmp.get_children()[0].get_str();
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regist_string(str);
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opcode tmp;
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tmp.op=op_defpara;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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else if(tmp.get_type()==ast_dynamic_id)
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{
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std::string str=tmp.get_str();
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regist_string(str);
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opcode tmp;
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tmp.op=op_dynpara;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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}
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op.op=op_entry;
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op.index=0;
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exec_code.push_back(op);
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op.op=op_jmp;
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op.index=0;
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int ptr=exec_code.size();
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exec_code.push_back(op);
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nasal_ast& block=ast.get_children()[1];
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block_gen(block);
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if(!block.get_children().size() || block.get_children().back().get_type()!=ast_return)
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{
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op.op=op_pushnil;
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op.index=0;
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exec_code.push_back(op);
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op.op=op_return;
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op.index=0;
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exec_code.push_back(op);
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}
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exec_code[ptr].index=exec_code.size();
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return;
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}
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void nasal_codegen::call_gen(nasal_ast& ast)
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{
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if(ast.get_children()[0].get_type()==ast_identifier)
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{
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std::string str=ast.get_children()[0].get_str();
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regist_string(str);
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opcode op;
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op.op=op_call;
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op.index=string_table[str];
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exec_code.push_back(op);
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}
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else
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calculation_gen(ast.get_children()[0]);
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int child_size=ast.get_children().size();
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for(int i=0;i<child_size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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if(tmp.get_type()==ast_call_hash)
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{
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opcode op;
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op.op=op_callh;
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std::string str=tmp.get_str();
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regist_string(str);
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op.index=string_table[str];
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exec_code.push_back(op);
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}
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;// unfinished
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}
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return;
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}
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void nasal_codegen::call_id(nasal_ast& ast)
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{
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std::string str=ast.get_str();
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regist_string(str);
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opcode op;
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op.op=op_call;
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op.index=string_table[str];
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::single_def(nasal_ast& ast)
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{
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calculation_gen(ast.get_children()[1]);
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std::string str=ast.get_children()[0].get_str();
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regist_string(str);
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opcode op;
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op.op=op_load;
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op.index=string_table[str];
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::multi_def(nasal_ast& ast)
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{
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for(int i=0;i<ast.get_children()[0].get_children().size();++i);
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return;
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}
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void nasal_codegen::definition_gen(nasal_ast& ast)
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{
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if(ast.get_children()[0].get_type()==ast_identifier)
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single_def(ast);
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else
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multi_def(ast);
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return;
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}
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void nasal_codegen::multi_assignment_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::conditional_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::loop_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::calculation_gen(nasal_ast& ast)
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{
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opcode op;
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op.index=0;
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switch(ast.get_type())
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{
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case ast_nil:nil_gen();break;
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case ast_number:number_gen(ast);break;
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case ast_string:string_gen(ast);break;
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case ast_identifier:call_id(ast);break;
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case ast_vector:vector_gen(ast);break;
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case ast_hash:hash_gen(ast);break;
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case ast_function:function_gen(ast);break;
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case ast_call:call_gen(ast);break;
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
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case ast_mult_equal:
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case ast_div_equal:
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case ast_link_equal:break;
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case ast_add:
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op.op=op_add;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_sub:
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op.op=op_sub;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_mult:
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op.op=op_mul;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_div:
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op.op=op_div;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_link:
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op.op=op_lnk;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_trinocular:break;
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case ast_unary_sub:
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op.op=op_usub;
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calculation_gen(ast.get_children()[0]);
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exec_code.push_back(op);
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break;
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case ast_unary_not:
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op.op=op_unot;
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calculation_gen(ast.get_children()[0]);
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exec_code.push_back(op);
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break;
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}
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return;
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}
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int nasal_codegen::block_gen(nasal_ast& ast)
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{
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int begin_size=exec_code.size();
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int size=ast.get_children().size();
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for(int i=0;i<size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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switch(tmp.get_type())
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{
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case ast_null:
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case ast_nil:
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case ast_number:
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case ast_string:
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case ast_function:break;
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case ast_definition:definition_gen(tmp);break;
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case ast_multi_assign:multi_assignment_gen(tmp);break;
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case ast_conditional:conditional_gen(tmp);break;
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case ast_while:
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case ast_for:
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case ast_forindex:
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case ast_foreach:loop_gen(tmp);break;
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case ast_identifier:
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case ast_vector:
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case ast_hash:
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case ast_call:
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
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case ast_mult_equal:
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case ast_div_equal:
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case ast_link_equal:
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case ast_unary_sub:
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case ast_unary_not:
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case ast_add:
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case ast_sub:
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case ast_mult:
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case ast_div:
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case ast_link:
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case ast_or:
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case ast_and:
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case ast_trinocular:calculation_gen(tmp);break;
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case ast_break:break;
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case ast_continue:break;
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case ast_return:return_gen(tmp);break;
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}
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}
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return exec_code.size()-begin_size;
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}
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void nasal_codegen::return_gen(nasal_ast& ast)
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{
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if(ast.get_children().size())
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calculation_gen(ast.get_children()[0]);
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opcode op;
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op.op=op_return;
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::main_progress(nasal_ast& ast)
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{
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error=0;
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number_table.clear();
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string_table.clear();
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exec_code.clear();
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int size=ast.get_children().size();
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for(int i=0;i<size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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switch(tmp.get_type())
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{
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case ast_null:
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case ast_nil:
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case ast_number:
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case ast_string:
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case ast_function:break;
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case ast_definition:definition_gen(tmp);break;
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case ast_multi_assign:multi_assignment_gen(tmp);break;
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case ast_conditional:conditional_gen(tmp);break;
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case ast_while:
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case ast_for:
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case ast_forindex:
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case ast_foreach:loop_gen(tmp);break;
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case ast_identifier:
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case ast_vector:
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case ast_hash:
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case ast_call:
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
|
|
case ast_mult_equal:
|
|
case ast_div_equal:
|
|
case ast_link_equal:
|
|
case ast_unary_sub:
|
|
case ast_unary_not:
|
|
case ast_add:
|
|
case ast_sub:
|
|
case ast_mult:
|
|
case ast_div:
|
|
case ast_link:
|
|
case ast_or:
|
|
case ast_and:
|
|
case ast_trinocular:calculation_gen(tmp);break;
|
|
}
|
|
}
|
|
opcode op;
|
|
op.op=op_nop;
|
|
op.index=0;
|
|
exec_code.push_back(op);
|
|
|
|
number_result_table.resize(number_table.size());
|
|
string_result_table.resize(string_table.size());
|
|
for(std::map<double,int>::iterator i=number_table.begin();i!=number_table.end();++i)
|
|
number_result_table[i->second]=i->first;
|
|
for(std::map<std::string,int>::iterator i=string_table.begin();i!=string_table.end();++i)
|
|
string_result_table[i->second]=i->first;
|
|
return;
|
|
}
|
|
|
|
void nasal_codegen::print_op(int index)
|
|
{
|
|
std::string numinfo="";
|
|
int num=index;
|
|
for(int i=0;i<8;++i)
|
|
{
|
|
int tmp=num&0x0f;
|
|
numinfo=(char)(tmp>9? 'a'+tmp-10:'0'+tmp)+numinfo;
|
|
num>>=4;
|
|
}
|
|
std::cout<<"0x"<<numinfo<<": ";
|
|
for(int i=0;code_table[i].name;++i)
|
|
if(exec_code[index].op==code_table[i].type)
|
|
{
|
|
std::cout<<code_table[i].name<<" ";
|
|
break;
|
|
}
|
|
numinfo="";
|
|
num=exec_code[index].index;
|
|
for(int i=0;i<8;++i)
|
|
{
|
|
int tmp=num&0x0f;
|
|
numinfo=(char)(tmp>9? 'a'+tmp-10:'0'+tmp)+numinfo;
|
|
num>>=4;
|
|
}
|
|
std::cout<<"0x"<<numinfo;
|
|
switch(exec_code[index].op)
|
|
{
|
|
case op_pushnum:std::cout<<'('<<number_result_table[exec_code[index].index]<<')';break;
|
|
case op_call:
|
|
case op_mcall:
|
|
case op_pushstr:
|
|
case op_callh:
|
|
case op_mcallh:
|
|
case op_para:
|
|
case op_defpara:
|
|
case op_dynpara:
|
|
case op_load:
|
|
case op_loadv:std::cout<<'('<<string_result_table[exec_code[index].index]<<')';break;
|
|
}
|
|
std::cout<<'\n';
|
|
return;
|
|
}
|
|
|
|
void nasal_codegen::print_byte_code()
|
|
{
|
|
int size=exec_code.size();
|
|
for(int i=0;i<size;++i)
|
|
print_op(i);
|
|
return;
|
|
}
|
|
|
|
#endif |