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373 lines
12 KiB
D
373 lines
12 KiB
D
/*
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* Copyright (c) 2001
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* Pavel "EvilOne" Minayev
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Author makes no representations about
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* the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*/
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import core.stdc.stdio;
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import std.conv;
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import std.string;
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import std.stdio;
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import std.ascii;
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import std.file;
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// colors for syntax highlighting, default values are
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// my preferences in Microsoft Visual Studio editor
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enum Colors
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{
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keyword = "0000FF",
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number = "008000",
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astring = "000080",
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comment = "808080"
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}
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enum tabsize = 4; // number of spaces in tab
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bool[string] keywords;
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void main(string[] args)
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{
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// need help?
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if (args.length < 2 || args.length > 3)
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{
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printf("D to HTML converter\n" ~
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"Usage: D2HTML <program>.d [<file>.htm]\n");
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return;
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}
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// auto-name output file
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if (args.length == 2)
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args ~= args[1] ~ ".htm";
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// load keywords
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assert("d2html.kwd".exists, "file d2html.kwd does not exist");
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auto kwd = File("d2html.kwd");
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foreach (word; kwd.byLine())
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keywords[word.idup] = true;
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kwd.close();
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// open input and output files
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auto src = File(args[1]);
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auto dst = File(args[2], "w");
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// write HTML header
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dst.writeln("<html><head><title>" ~ args[1] ~ "</title></head>");
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dst.writeln("<body color='#000000' bgcolor='#FFFFFF'><pre><code>");
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// the main part is wrapped into try..catch block because
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// when end of file is reached, an exception is raised;
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// so we can omit any checks for EOF inside this block...
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try
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{
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static char readc(ref File src)
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{
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while (true)
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{
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if (src.eof())
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throw new Exception("");
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char c;
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src.readf("%c", &c);
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if (c != '\r' && c != 0xFF)
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return c;
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}
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}
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ulong linestart = 0; // for tabs
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char c;
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c = readc(src);
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while (true)
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{
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if (isWhite(c)) // whitespace
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{
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do
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{
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if (c == 9)
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{
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// expand tabs to spaces
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immutable spaces = tabsize -
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(src.tell() - linestart) % tabsize;
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for (int i = 0; i < spaces; i++)
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dst.write(" ");
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linestart = src.tell() - tabsize + 1;
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}
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else
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{
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// reset line start on newline
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if (c == 10 || c == 13)
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linestart = src.tell() + 1;
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dst.write(c);
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}
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c = readc(src);
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} while (isWhite(c));
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}
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else if (isAlpha(c)) // keyword or identifier
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{
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string token;
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do
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{
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token ~= c;
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c = readc(src);
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} while (isAlpha(c) || isDigit(c));
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if (token in keywords) // keyword
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dst.write("<font color='#" ~ Colors.keyword ~
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"'>" ~ token ~ "</font>");
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else // simple identifier
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dst.write(token);
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}
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else if (c == '0') // binary, octal or hexadecimal number
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{
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dst.write("<font color='#" ~ Colors.number ~ "008000'>");
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dst.write(c);
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c = readc(src);
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if (c == 'X' || c == 'x') // hexadecimal
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{
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dst.write(c);
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c = readc(src);
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while (isHexDigit(c)) {
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dst.write(c);
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c = readc(src);
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}
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// TODO: add support for hexadecimal floats
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}
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else if (c == 'B' || c == 'b') // binary
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{
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dst.write(c);
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c = readc(src);
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while (c == '0' || c == '1') {
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dst.write(c);
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c = readc(src);
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}
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}
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else // octal
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{
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do
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{
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dst.write(c);
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c = readc(src);
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} while (isOctalDigit(c));
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}
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dst.write("</font>");
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}
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else if (c == '#') // hash
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{
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dst.write(c);
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c = readc(src);
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}
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else if (c == '\\') // backward slash
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{
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dst.write(c);
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c = readc(src);
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}
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else if (isDigit(c)) // decimal number
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{
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dst.write("<font color='#" ~ Colors.number ~ "'>");
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// integral part
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do
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{
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dst.write(c);
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c = readc(src);
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} while (isDigit(c));
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// fractional part
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if (c == '.')
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{
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dst.write(c);
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c = readc(src);
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while (isDigit(c))
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{
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dst.write(c);
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c = readc(src);
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}
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}
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// scientific notation
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if (c == 'E' || c == 'e')
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{
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dst.write(c);
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c = readc(src);
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if (c == '+' || c == '-')
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{
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dst.write(c);
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c = readc(src);
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}
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while (isDigit(c))
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{
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dst.write(c);
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c = readc(src);
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}
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}
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// suffices
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while (c == 'U' || c == 'u' || c == 'L' ||
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c == 'l' || c == 'F' || c == 'f')
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{
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dst.write(c);
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c = readc(src);
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}
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dst.write("</font>");
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}
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else if (c == '\'') // string without escape sequences
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{
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dst.write("<font color='#" ~ Colors.astring ~ "'>");
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do
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{
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if (c == '<') // special symbol in HTML
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dst.write("<");
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else
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dst.write(c);
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c = readc(src);
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} while (c != '\'');
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dst.write(c);
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c = readc(src);
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dst.write("</font>");
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}
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else if (c == 34) // string with escape sequences
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{
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dst.write("<font color='#" ~ Colors.astring ~ "'>");
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char prev; // used to handle \" properly
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do
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{
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if (c == '<') // special symbol in HTML
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dst.write("<");
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else
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dst.write(c);
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prev = c;
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c = readc(src);
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} while (!(c == 34 && prev != '\\')); // handle \"
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dst.write(c);
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c = readc(src);
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dst.write("</font>");
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}
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else if (isPunctuation(c)) // either operator or comment
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{
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if (c == '<') // special symbol in HTML
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{
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dst.write("<");
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c = readc(src);
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}
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else if (c == '/') // could be a comment...
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{
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c = readc(src);
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if (c == '/') // single-line one
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{
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dst.write("<font color='#" ~ Colors.comment ~ "'>/");
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while (c != 10)
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{
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if (c == '<') // special symbol in HTML
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dst.write("<");
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else if (c == 9)
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{
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// expand tabs
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immutable spaces2 = tabsize -
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(src.tell() - linestart) % tabsize;
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for (int i2 = 0; i2 < spaces2; i2++)
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dst.write(" ");
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linestart = src.tell() - tabsize + 1;
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}
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else
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dst.write(c);
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c = readc(src);
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}
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dst.write("</font>");
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}
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else if (c == '*') // multi-line one
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{
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dst.write("<font color='#" ~ Colors.comment ~ "'>/");
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char prev2;
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do
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{
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if (c == '<') // special symbol in HTML
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dst.write("<");
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else if (c == 9)
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{
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// expand tabs
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immutable spaces3 = tabsize -
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(src.tell() - linestart) % tabsize;
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for (int i3 = 0; i3 < spaces3; i3++)
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dst.write(" ");
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linestart = src.tell() - tabsize + 1;
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}
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else
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{
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// reset line start on newline
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if (c == 10 || c == 13)
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linestart = src.tell() + 1;
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dst.write(c);
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}
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prev2 = c;
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c = readc(src);
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} while (!(c == '/' && prev2 == '*'));
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dst.write(c);
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dst.write("</font>");
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c = readc(src);
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}
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else // just an operator
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dst.write(cast(char) '/');
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}
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else // just an operator
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{
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dst.write(c);
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c = readc(src);
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}
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}
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else
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{
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// whatever it is, it's not a valid D token
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throw new Error("unrecognized token " ~ c);
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//~ break;
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}
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}
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}
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// if end of file is reached and we try to read something
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// with typed read(), a ReadError is thrown; in our case,
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// this means that job is successfully done
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catch (Exception e)
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{
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// write HTML footer
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dst.writeln("</code></pre></body></html>");
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}
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return;
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}
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