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Annotation of parser3/src/main/compile_tools.C, revision 1.66

1.29      paf         1: /** @file
1.30      paf         2:        Parser: compiler support helper functions.
                      3: 
1.62      misha       4:        Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
1.45      paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.51      paf         6: */
1.30      paf         7: 
1.66    ! misha       8: static const char * const IDENT_COMPILE_TOOLS_C="$Date: 2009-05-23 05:23:03 $";
1.1       paf         9: 
                     10: #include "compile_tools.h"
                     11: #include "pa_string.h"
                     12: #include "pa_array.h"
                     13: #include "pa_exception.h"
1.9       paf        14: #include "pa_vstring.h"
1.15      paf        15: #include "pa_vdouble.h"
1.1       paf        16: 
1.61      misha      17: Value* LA2V(ArrayOperation& literal_string_array, int offset, OP::OPCODE code) {
                     18:        return literal_string_array[offset+0].code==code?literal_string_array[offset+2/*skip opcode&origin*/].value
1.43      paf        19:                :0;
1.15      paf        20: }
                     21: 
1.58      paf        22: void maybe_change_string_literal_to_double_literal(ArrayOperation& literal_array) {
1.60      misha      23:        assert(literal_array[0].code==OP::OP_VALUE);
1.58      paf        24:        VString& vstring=*static_cast<VString*>(literal_array[2/*opcode+origin*/].value);
                     25:        if(isdigit(vstring.string().first_char()))
                     26:                literal_array.put(2/*opcode+origin*/, &vstring.as_expr_result());
1.1       paf        27: }
1.53      paf        28: 
1.55      paf        29: void change_string_literal_value(ArrayOperation& literal_string_array, const String& new_value) {
1.60      misha      30:        assert(literal_string_array[0].code==OP::OP_VALUE);
1.58      paf        31:        static_cast<VString*>(literal_string_array[2/*opcode+origin*/].value)->set_string(new_value);
1.53      paf        32: }
                     33: 
1.55      paf        34: void changetail_or_append(ArrayOperation& opcodes, 
1.60      misha      35:                                                  OP::OPCODE find, bool with_argument, OP::OPCODE replace, OP::OPCODE notfound) {
1.55      paf        36:        int tail=opcodes.count()-(with_argument?2:1);
1.49      paf        37:        if(tail>=0) {
1.55      paf        38:                Operation& op=opcodes.get_ref(tail);
1.48      paf        39:                if(op.code==find) {
                     40:                        op.code=replace;
                     41:                        return;
                     42:                }
                     43:        }
                     44: 
1.55      paf        45:        opcodes+=Operation(notfound);
1.48      paf        46: }
                     47: 
1.66    ! misha      48: bool maybe_change_first_opcode(ArrayOperation& opcodes, OP::OPCODE find, OP::OPCODE replace) {
        !            49:        if(opcodes[0].code!=find)
        !            50:                return false;
1.1       paf        51: 
1.66    ! misha      52:        opcodes.put(0, replace);
        !            53:        return true;
1.62      misha      54: }
                     55: 
1.55      paf        56: void push_LS(Parse_control& pc, lexical_state new_state) { 
1.42      paf        57:        if(pc.ls_sp<MAX_LEXICAL_STATES) {
                     58:                pc.ls_stack[pc.ls_sp++]=pc.ls;  
                     59:                pc.ls=new_state;
1.1       paf        60:        } else
1.55      paf        61:                throw Exception(0, 0, 
                     62:                        "push_LS: ls_stack overflow");
1.1       paf        63: }
1.55      paf        64: void pop_LS(Parse_control& pc) {
1.42      paf        65:        if(--pc.ls_sp>=0)
                     66:                pc.ls=pc.ls_stack[pc.ls_sp];
1.1       paf        67:        else
1.55      paf        68:                throw Exception(0, 0, 
                     69:                        "pop_LS: ls_stack underflow");
                     70: }
                     71: 
                     72: const String& Parse_control::alias_method(const String& name) {
                     73:        return (main_alias && name==main_method_name)?*main_alias:name;
1.1       paf        74: }