// BIN2C.CPP
// by Jonathon Fowler (jonof@edgenetwork.org)

// Converts a binary file to C source
// This is a DOS program originally written with Borland Turbo C++ for DOS 3.1


#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <dir.h>
#include <io.h>
#include <stdlib.h>


char defsrcext[] = ".DAT";
char defoutext[] = ".C";

char source[MAXPATH], output[MAXPATH], bytesize;


int PathAddExt(char *path, char *ext);


void main(int argc, char *argv[])
{
	printf("BIN2C - Binary to C data converter\n"
			 "Copyright (c) 1999 Jonathon Fowler\n\n");

	if (argc < 4)
	{
		printf("Usage:\n"
				 "   BIN2C source<.DAT> output<.C> b|w\n\n"
				 "   source<.DAT>   Binary source file\n"
				 "   output<.C>     Output C code file\n"
				 "   b|w            Byte or word-sized data\n\n");
		exit(0);
	}

	int arg;
	FILE *in, *out;
	char datab1, datab2;
	int across=0, maxacross;
	long length, written=0;


	// get the source file
	strcpy(source, argv[1]);
	strupr(source);
	PathAddExt(source, defsrcext);
	printf("þ Source file:  %s\n", source);

	// get the output file
	strcpy(output, argv[2]);
	strupr(output);
	PathAddExt(output, defoutext);
	printf("þ Output file:  %s\n", output);

	// get byte/word data
	switch (tolower(argv[3][0]))
	{
		case 'b':
			printf("þ Byte data.\n");
			bytesize=1;
			break;

		case 'w':
			printf("þ Word data.\n");
			bytesize=0;
			break;

		default:
			printf("þ Unknown data size specified. Defaulting to byte.\n");
			bytesize=1;
			break;
	}

	// open the input file
	in = fopen(source, "rb");
	if (!in)
	{
		printf("Error opening %s\n", source);
		exit(1);
	}

	// open the output file
	out = fopen(output, "w+t");
	if (!out)
	{
		printf("Error creating %s\n", output);
		exit(1);
	}

	length = filelength(fileno(in));

	// write a header out to the output file
	fprintf(out, "// %s\n\n// Generated by BIN2C.EXE\n// By Jonathon Fowler\n\n", output);

	// start a data block
	fprintf(out, "%s datablock[] = {\n // %ld bytes", (bytesize) ? "char" : "unsigned", length);

	if (bytesize)
		maxacross = 12;
	else
		maxacross = 9;
	across = maxacross;

	// convert the data
	for (written=0; written<length; written++) {
		if (across == maxacross)
		{
			fprintf(out, "\n  ");
			across = 0;
		}

		if (bytesize)
		{
			datab1 = fgetc(in);
			fprintf(out, " 0x%02X%c", datab1, ((length-written)>1) ? ',' : '\n');
		} else {
			datab1 = fgetc(in);
			datab2 = fgetc(in);
			fprintf(out, " 0x%02X%02X%c", datab2, datab1, ((length-written)>2) ? ',' : '\n');
		}

		across++;

		if (!bytesize) written++;
	}


	fprintf(out, "  };");

	fclose(out);
	fclose(in);
}


// Add an extention to a path if one doesn't exist
int PathAddExt(char *path, char *ext)
{
	char drive[MAXDRIVE], dir[MAXDIR], name[MAXFILE], extn[MAXEXT];
	int flags;

	flags = fnsplit(path, drive, dir, name, extn);

	if (!(flags & EXTENSION))	// tack on an extension
		strcat(path, ext);

	return ((flags & EXTENSION) == 0);
}
