Elysian Shadows

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#include <stdio.h>
#include <stdlib.h>


#define MAX_FILENAME 300

static char *ptr;

int do_command(const char command, FILE *pFile)
{
	char c;
	int pos;

	switch (command)
	{
		case '>':
			++ptr;
			break;
		case '<':
			--ptr;
			break;
		case '+':
			++*ptr;
			break;
		case '-':
			--*ptr;
			break;
		case '.':
			putchar(*ptr);
			break;
		case ',':
			*ptr=getchar();
			break;
		case '[':
			pos = ftell(pFile);
			while (*ptr)
			{
				fseek(pFile, pos, SEEK_SET);
				c = getc(pFile);
				while (c != ']' && c != EOF)
				{
					do_command(c, pFile);
					c = getc(pFile);
				}
			}
			break;
	}
}

int parse_source(const char *source)
{
	char command; // Stores each command
	FILE *pFile = fopen(source, "r");

	if (pFile) // If we were able to open the file
	{
		while ((command = getc(pFile)) != EOF) // For each character in file
		{
			do_command(command, pFile); // Execute command
		}
	}
	else
	{
		printf("File could not be read.");
	}

	fclose(pFile);
}

int main(int argc, const char *argv[])
{
	int memory[9001]; // Make array to store values in
	ptr = &memory; // Put it into the global pointer

	parse_source(argv[1]); // Parse the source file defined in argument
	return 0;
}

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#define BRAINF_ARRAY 100

class Brainf
{
public:
	Brainf(){  bf = (char*)mem;  }

	~Brainf(){  bf = NULL;
		delete bf;  }

	void Parse(std::string line)
	{
		int position=0;
		const char *str = line.c_str();
		char cmd;

		while (position != line.length())
		{
			cmd=str[position];

			switch (cmd)
			{

				// THESE CASES ARE ALL THE SAME EXCEPT THE ONE BELOW
				// SO I HAVE OMITTED THEM FROM THE CODE FOR LENGTH REASONS
				case '[':
					{
						std::string tmp;
						position++;          // If you find '[' add one to the position, so that I don't create an infinite loop of  [
						while (*bf)
						{
							while (cmd != ']')
							{
								cmd=str[position];	// AS FAR AS I KNOW: This code should append each command after '[' and before ']'
								tmp += cmd;		//		to the string 'tmp' and add one to the position afterward, before going back and doing it again
								position++;		// 	However, the output of the string I input should be "Hello world!" just for testing, 
							}					//	and it works properly with the C code. But instead outputs characters it isn't supposed to.
							Parse(tmp);			//	I know it's because of this loop segment, or perhaps with the position it's looping through.
						}
					}
					break;
			}
			position++; // After each character of the array is parsed, the position is increased
		}
	}


private:
	// std::fstream file;
	int mem[BRAINF_ARRAY];
	// bf = &memory;
	char *bf;
};

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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.