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Annotation of parser3/src/main/compile_tools.C, revision 1.49

1.29      paf         1: /** @file
1.30      paf         2:        Parser: compiler support helper functions.
                      3: 
1.44      paf         4:        Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.45      paf         5:        Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.30      paf         6: 
1.49    ! paf         7:        $Id: compile_tools.C,v 1.48 2002/04/15 08:13:10 paf Exp $
1.1       paf         8: */
                      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: 
1.27      paf        17: void PV(Array/*<Operation>*/ *result, Value *value) {
1.16      paf        18:        // append OP_VALUE
                     19:        Operation op; op.code=OP_VALUE;
1.6       paf        20:        *result+=op.cast;
1.1       paf        21: 
1.17      paf        22:        // append 'value'
                     23:        *result+=value;
1.12      paf        24: }
1.13      paf        25: 
1.33      paf        26: Value *LA2V(Array *literal_string_array, int offset) {
1.11      paf        27:        Operation op;
                     28:        op.cast=literal_string_array->get(offset+0);
1.43      paf        29:        return op.code==OP_VALUE?
                     30:                static_cast<Value *>(literal_string_array->get(offset+1))
                     31:                :0;
1.15      paf        32: }
                     33: 
                     34: void change_string_literal_to_double_literal(Array *literal_string_array) {
                     35:        VString *vstring=static_cast<VString *>(literal_string_array->get(1));
1.32      paf        36:        Value *value=vstring->as_expr_result();
1.22      paf        37:        literal_string_array->put(1, value);
1.1       paf        38: }
1.49    ! paf        39: void changetail_or_append(Array *opcodes, 
        !            40:                                                  OPCODE find, bool with_argument, OPCODE replace, OPCODE notfound) {
        !            41:        int tail=opcodes->size()-(with_argument?2:1);
        !            42:        if(tail>=0) {
1.48      paf        43:                Operation op;
                     44:                op.cast=opcodes->get(tail);
                     45:                if(op.code==find) {
                     46:                        op.code=replace;
                     47:                        opcodes->put(tail, op.cast);
                     48:                        return;
                     49:                }
                     50:        }
                     51: 
                     52:        Operation op; op.code=notfound;
                     53:        *opcodes+=op.cast;
                     54: }
                     55: 
1.1       paf        56: 
1.31      paf        57: void push_LS(parse_control& pc, lexical_state new_state) { 
1.42      paf        58:        if(pc.ls_sp<MAX_LEXICAL_STATES) {
                     59:                pc.ls_stack[pc.ls_sp++]=pc.ls;  
                     60:                pc.ls=new_state;
1.1       paf        61:        } else
1.46      paf        62:                throw Exception(0, 0, "push_LS: ls_stack overflow");
1.1       paf        63: }
1.31      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
1.46      paf        68:                throw Exception(0, 0, "pop_LS: ls_stack underflow");
1.1       paf        69: }