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- /*
- *
- * Copyright (c) 1998-2002
- * John Maddock
- *
- * Use, modification and distribution are subject to the
- * Boost Software License, Version 1.0. (See accompanying file
- * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- *
- */
- /*
- * LOCATION: see http://www.boost.org for most recent version.
- * FILE regex_replace_example.cpp
- * VERSION see <boost/version.hpp>
- * DESCRIPTION: regex_replace example:
- * converts a C++ file to syntax highlighted HTML.
- */
- #include <boost/regex.hpp>
- #include <iostream>
- #include <fstream>
- #include <sstream>
- #include <string>
- #include <iterator>
- #include <fstream>
- #include <iostream>
- // purpose:
- // takes the contents of a file and transform to
- // syntax highlighted code in html format
- boost::regex e1, e2;
- extern const char* expression_text;
- extern const char* format_string;
- extern const char* pre_expression;
- extern const char* pre_format;
- extern const char* header_text;
- extern const char* footer_text;
- void load_file(std::string& s, std::istream& is)
- {
- s.erase();
- if(is.bad()) return;
- s.reserve(static_cast<std::string::size_type>(is.rdbuf()->in_avail()));
- char c;
- while(is.get(c))
- {
- if(s.capacity() == s.size())
- s.reserve(s.capacity() * 3);
- s.append(1, c);
- }
- }
- int main(int argc, const char** argv)
- {
- try{
- e1.assign(expression_text);
- e2.assign(pre_expression);
- for(int i = 1; i < argc; ++i)
- {
- std::cout << "Processing file " << argv[i] << std::endl;
- std::ifstream fs(argv[i]);
- std::string in;
- load_file(in, fs);
- fs.close();
- std::string out_name = std::string(argv[i]) + std::string(".htm");
- std::ofstream os(out_name.c_str());
- os << header_text;
- // strip '<' and '>' first by outputting to a
- // temporary string stream
- std::ostringstream t(std::ios::out | std::ios::binary);
- std::ostream_iterator<char> oi(t);
- boost::regex_replace(oi, in.begin(), in.end(), e2, pre_format, boost::match_default | boost::format_all);
- // then output to final output stream
- // adding syntax highlighting:
- std::string s(t.str());
- std::ostream_iterator<char> out(os);
- boost::regex_replace(out, s.begin(), s.end(), e1, format_string, boost::match_default | boost::format_all);
- os << footer_text;
- os.close();
- }
- }
- catch(...)
- { return -1; }
- return 0;
- }
- const char* pre_expression = "(<)|(>)|(&)|\\r";
- const char* pre_format = "(?1<)(?2>)(?3&)";
- const char* expression_text = // preprocessor directives: index 1
- "(^[[:blank:]]*#(?:[^\\\\\\n]|\\\\[^\\n[:punct:][:word:]]*[\\n[:punct:][:word:]])*)|"
- // comment: index 2
- "(//[^\\n]*|/\\*.*?\\*/)|"
- // literals: index 3
- "\\<([+-]?(?:(?:0x[[:xdigit:]]+)|(?:(?:[[:digit:]]*\\.)?[[:digit:]]+(?:[eE][+-]?[[:digit:]]+)?))u?(?:(?:int(?:8|16|32|64))|L)?)\\>|"
- // string literals: index 4
- "('(?:[^\\\\']|\\\\.)*'|\"(?:[^\\\\\"]|\\\\.)*\")|"
- // keywords: index 5
- "\\<(__asm|__cdecl|__declspec|__export|__far16|__fastcall|__fortran|__import"
- "|__pascal|__rtti|__stdcall|_asm|_cdecl|__except|_export|_far16|_fastcall"
- "|__finally|_fortran|_import|_pascal|_stdcall|__thread|__try|asm|auto|bool"
- "|break|case|catch|cdecl|char|class|const|const_cast|continue|default|delete"
- "|do|double|dynamic_cast|else|enum|explicit|extern|false|float|for|friend|goto"
- "|if|inline|int|long|mutable|namespace|new|operator|pascal|private|protected"
- "|public|register|reinterpret_cast|return|short|signed|sizeof|static|static_cast"
- "|struct|switch|template|this|throw|true|try|typedef|typeid|typename|union|unsigned"
- "|using|virtual|void|volatile|wchar_t|while)\\>"
- ;
- const char* format_string = "(?1<font color=\"#008040\">$&</font>)"
- "(?2<I><font color=\"#000080\">$&</font></I>)"
- "(?3<font color=\"#0000A0\">$&</font>)"
- "(?4<font color=\"#0000FF\">$&</font>)"
- "(?5<B>$&</B>)";
- const char* header_text = "<HTML>\n<HEAD>\n"
- "<TITLE>Auto-generated html formated source</TITLE>\n"
- "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=windows-1252\">\n"
- "</HEAD>\n"
- "<BODY LINK=\"#0000ff\" VLINK=\"#800080\" BGCOLOR=\"#ffffff\">\n"
- "<P> </P>\n<PRE>";
- const char* footer_text = "</PRE>\n</BODY>\n\n";
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