A HIPER basic compiler

gistfile1.c

/*

INPUT SAMPLE:

VAR TESTE = 25
PRINT "ALEXANDRE"  
PRINT TESTE
GETCHAR

*/

#include <stdio.h>
#include <string>
#include <vector>
#include <map>
#include <Windows.h>

using namespace std;

bool compile(FILE *fp);
bool CodeGen(std::vector<string> tokens);

void GenPrint(std::vector<string> tokens, int _pos);
void GenVar(std::vector<string> tokens, std::map<string, string> _varInfo, int _pos);
void GenGet();

int main()
{
	char *filename = "test.in";

	FILE *fp = fopen(filename, "rb");
	if(!fp)
	{
		return 1;
	}

	if(!compile(fp))
	{
		printf("ERROR...\n");
	}
	fclose(fp);
}

bool compile(FILE *fp)
{
	char c;
	string token;
	std::vector<string> tokens;
	bool _return = true;

	while ((c = getc(fp)) != EOF)
	{
		if(isalpha(c) || isalnum(c) || c == '"' || c == '=')
		{
			token += c;
		}
		else if(c == ' ' || c == '\0' || c == '\n')
		{
			tokens.push_back(token);
			token = "";
		}
	}
	tokens.push_back(token);

	if(!CodeGen(tokens))
		_return = false;

	return _return;
}

bool CodeGen(std::vector<string> tokens)
{
	int i;
	bool _return = true;
	map<string, string> _varInfo;

	for(i=0;i<tokens.size();i++)
	{
		if(tokens[i] == "PRINT")
		{
			if(tokens[i+1][0] == '"')
			{
				printf("STRING\n");
			}
			else
			{
				printf("VARIAVEL\n");
			}
			GenPrint(tokens, i);
		}
		else if(tokens[i] == "VAR")
		{
			if(tokens[i+2] != "=")
			{
				printf("Error... faltou o =");
				_return = false;
			}
			else
			{
				_varInfo.insert(make_pair(tokens[i+1], tokens[i+3]));
			}
			GenVar(tokens, _varInfo, i);
		}
		else if(tokens[i] == "GETLINE")
		{
			GenGet();
		}
	}
	return _return;
}


// ++++++++++++++++++++ //
// The code gen section //
// ++++++++++++++++++++ //
void GenPrint(std::vector<string> tokens, int _pos) 
{
	printf("Console.WriteLine(%s);", tokens[_pos+1].c_str());
}

void GenVar(std::vector<string> tokens, std::map<string, string> _varInfo, int _pos)
{
	map<string, string>::iterator it = _varInfo.find(tokens[_pos+1]);
	if(it != _varInfo.end())
	{
		// Get the information from map
		printf("VARIABLE INFORMATIONS\n");
		printf("FIRST -> %s\n", it->first.c_str());
		printf("SECON -> %s\n", it->second.c_str());
	}
}

void GenGet()
{
	printf("Console.ReadLine();");
}