global.cpp

一个c语言的编译器的源代码

// This file declares some global variables
//
// Written by bood, [e-mail], http://boodweb.126.com
// 2004-08-06

#pragma warning(disable:4786)

#include "global.h"

using namespace std;

// Define file streams
//
// For reading source file
ifstream fsource;

// For preprocessed source file
ofstream fpreproc;

// For outputting tokens-file
ofstream ftoken;

// For outputting syntax-file
ofstream fsyntax;

// For outputting symbol-file
ofstream fsymbol;

// For code generation
ofstream fcode;
//
// File streams define ended

int lineno=1;           // Line number
int location=0;         // Location of variables in memory, relative
                        // to the fp

int bParseError=0;      // Error flag
int bSemanticError=0;

int globalAlloc=0;      // Global memory needed

//
// Values below affect the generated code
const int Ret_and_Ofp = // Space taken up before parameters
	2 +	// Return ip, take 2 bytes in 16bit code
	2;	// Old frame pointer, i.e. register BP
const int Int_Bytes = 4; // Length of integer