C++ to HTML conversion program

cpp2htm.cpp - C++ to HTML conversion program
// cpp2htm.cpp - formats a C++ source/header file as html
// Note:  this version produces output files name as 
//		<inputfilename.cpp> <inputfilename_cpp.htm>


#include <iostream>
#include <fstream>
#include <cstring>
#include <cstdlib>
#include <cctype>
using namespace std;

void replace_lt_gt_tab_sp(char * buf);
void cpp_comment(char * buf);
void c_comment_start(char * buf);
void c_comment_end(char * buf);

bool c_comment_on = false;

int main(int argc,char *argv[]) 
{
	char	infile[32], outfile[32];
	char	description[80];
	char	buf[1024];
	char*	ptr2char;

	if (argc<2||argc>4) 
	{
		cerr << "Invalid syntax\nUsage: cpptohtm <filename> [optional description]\n";
		exit(-1);
	}

	strcpy(infile,argv[1]);
	if (argc > 2) strcpy(description,argv[2]);
        else strcpy(description,"");
	
	ifstream fin(infile);
	if (!fin) {
		cerr << "Unable to find input file: " << infile << endl;
		exit(-2);
	}

	/* create output filename:
		first look for a . between name and extension, if found replace with "_"
		else just add ".htm" */
	strcpy(outfile,infile);
	ptr2char = strchr(outfile,'.');
	*ptr2char = '_';
//	if (ptr2char) *ptr2char = 0;
	strcat(outfile,".htm");

	ofstream fout(outfile);
	fout << "<HTML>\n";
	fout << "<HEAD>\n";
	fout << "<TITLE>" << description << "</TITLE>\n";
	fout << "</HEAD>\n";
	fout << "<BODY TEXT=\"#000033\" BGCOLOR=\"#FFFFCC\">\n";
	fout << "<TABLE HEIGHT=30 WIDTH=\"100%\" BGCOLOR=\"#FF99FF\">\n";
	fout << "<TR>\n";
	fout << "<TD ALIGN=\"LEFT\">\n";
	fout << "<FONT face=\"Arial,Helvetica\" size=+1>\n";
	fout << "<B>" << infile << " - " << description <<"</B></TD>\n";
	fout << "</TR></TABLE><BR><Pre>\n";

	// Read each line of the cpp file
	while (fin.getline(buf,sizeof(buf)))
	{
		// replace the < > tab and space characters
		replace_lt_gt_tab_sp(buf);

		// change font and color on C++ style comments
		cpp_comment(buf);

		// change font and color on C style comments
		c_comment_start(buf);
		c_comment_end(buf);

		// write line out to HTML file
		fout << buf << endl;

	}
	fout << "<BR>\n";
	fout << "</Pre>\n";
	fout << "<BR>\n";

	// insert horizontal line in HTML file
	fout << "<HR>\n";

	// insert Examples Home button in HTML file
	fout << "<TABLE BORDER=\"0\">\n";
	fout << "<TD ALIGN=center><FORM METHOD=\"LINK\" ACTION=\"examples.htm\">\n";
	fout << "<INPUT TYPE=\"submit\" VALUE=\"Examples Home\">\n";
	fout << "</FORM></TABLE>\n";

	// Last line in HTML page
	fout << "<FONT face=\"Arial,Helvetica\"\n";
	fout << "<BR><H6>CIS27: Programming in C++    Instructor: Joe Bentley</H6>";
	fout << "</Font>";
	fout << "</Body>\n";
	fout << "</Html>\n";

	return 0;
}

// replace the < > tab and space characters
void replace_lt_gt_tab_sp(char * buf)
{
	char temp[1024];
	temp [0] = 0;
	char c2[2];
	c2[1] = 0;
	size_t i;
	for (i = 0; i < strlen(buf) ; i++) {
		if (buf[i] == '<') strcat(temp,"<");
		else if (buf[i] == '>') strcat(temp,">");
		else {
			c2[0] = buf[i];
			strcat(temp,c2);
		}
	}
	*buf=0;
	strcpy(buf,temp);
}

// change color and font for c++ style comment
void cpp_comment(char * buf)
{
	char temp[1024];
	strcpy(temp,buf);
	char* p;
	p = strstr(buf,"//");
	if (!p||*(p-1)=='\"') return;
	if (p) 
	{
		temp[p-buf]=0;
		strcat(temp,"<I><FONT face=\"Arial,Helvetica\" color=\"00CCFF\">");
		strcat(temp,p);
		strcat(temp,"</FONT></I>");
	}
	*buf=0;
	strcpy(buf,temp);
}

/* change color and font for c style comment
   this looks for the "slash-asterisk" */
void c_comment_start(char * buf)
{
	char temp[1024];
	strcpy(temp,buf);
	char* p;
	if (c_comment_on) return;
	p = strstr(buf,"/*");
	if (!p||*(p-1)=='"') return;
	if (p) 
	{
		temp[p-buf]=0;
		strcat(temp,"<I><FONT face=\"Arial,Helvetica\" color=\"9999FF\">");
		strcat(temp,p);
	}
	*buf=0;
	strcpy(buf,temp);
	c_comment_on = true;
}

/* change color and font back to default after c style comment
   this looks for the "asterisk-slash" */
void c_comment_end(char * buf)
{
	char temp[1024];
	strcpy(temp,buf);
	char* p;
	if (!c_comment_on) return;
	p = strstr(buf,"*/");
	if (!p) return;
	if (p) 
	{
		temp[p-buf+2]=0;
		strcat(temp,"</FONT></I>");
		strcat(temp,p+2);
	}
	*buf=0;
	strcpy(buf,temp);
	c_comment_on = false;
}