Simple_Language/CG.h at master · hotTeaFun/Simple_Language · GitHub

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/***************************************************************************
Code Generator
***************************************************************************/
/*-------------------------------------------------------------------------
Data Segment
-------------------------------------------------------------------------*/
int data_offset = 0;/* Initial offset*/
int data_location()/* Reserves a data location*/
{
return data_offset++;
}
/*-------------------------------------------------------------------------
Code Segment
-------------------------------------------------------------------------*/
int code_offset = 0;/* Initial offset*/
int gen_label()     /* Returns current offset */
{
return code_offset;
}
int reserve_loc()   /* Reserves a code location */
{
return code_offset++;
}
                    /* Generates code at current location */
void gen_code( enum code_ops operation, int arg )
{ code[code_offset].op
= operation;
code[code_offset++].arg = arg;
}
                    /* Generates code at a reserved location*/
void back_patch( int addr, enum code_ops operation, int arg )
{
code[addr].op = operation;
code[addr].arg = arg;
}
/*-------------------------------------------------------------------------
Print Code to stdio
-------------------------------------------------------------------------*/
void print_code()
{
int i = 0;
while (i < code_offset) {
printf("%3ld: %-10s%4ld\n",i,op_name[(int) code[i].op], code[i].arg );
i++;
    }
}
/************************** End Code Generator **************************/