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