From cea325b7451c1fb8dd22462ec2e7b5b88ea9b547 Mon Sep 17 00:00:00 2001
From: Dennis Brentjes <d.brentjes@gmail.com>
Date: Sun, 19 Jun 2016 20:23:07 +0200
Subject: Adds an LE executable parser.

Adds the binparse library that holds common components for the MZ and LE parsers.
---
 mz/mz_header.cpp | 103 +++++++++++++++----------------------------------------
 1 file changed, 28 insertions(+), 75 deletions(-)

(limited to 'mz/mz_header.cpp')

diff --git a/mz/mz_header.cpp b/mz/mz_header.cpp
index e6d4461..323c9cd 100644
--- a/mz/mz_header.cpp
+++ b/mz/mz_header.cpp
@@ -1,110 +1,61 @@
+
 #include "mz_header.hpp"
+
 #include "index_list.hpp"
 
+#include "binparse.hpp"
+
 #include <boost/fusion/adapted/struct.hpp>
 #include <boost/fusion/adapted/struct/detail/extension.hpp>
 
 #include <vector>
 #include <iomanip>
 
-UnexpectedEOS::UnexpectedEOS()
-: std::runtime_error("Unexpected end of stream.")
-{}
+BOOST_FUSION_ADAPT_STRUCT(
+	mz::MZHeader,
+	(binparse::Magic16, magic)
+	(binparse::Value16, bytes_in_last_block)
+	(binparse::Value16, blocks_in_file)
+	(binparse::Value16, num_relocs)
+	(binparse::Value16, header_paragraphs)
+	(binparse::Value16, min_extra_paragraphs)
+	(binparse::Value16, max_extra_paragraphs)
+	(binparse::Offset16, ss)
+	(binparse::Offset16, sp)
+	(binparse::Value16, checksum)
+	(binparse::Offset16, ip)
+	(binparse::Offset16, cs)
+	(binparse::Offset16, reloc_table_offset)
+	(binparse::Value16, overlay_number)
+)
 
-UnexpectedEOS::UnexpectedEOS(std::__cxx11::string location)
-: std::runtime_error("Unexpected end of stream after " + location)
-{}
+namespace mz {
 
 NotAMZFileException::NotAMZFileException()
 : std::runtime_error("This stream does not contain a valid MZ executable")
 {}
 
-BOOST_FUSION_ADAPT_STRUCT(
-	MZHeader,
-	(Magic, magic)
-	(uint16_t, bytes_in_last_block)
-	(uint16_t, blocks_in_file)
-	(uint16_t, num_relocs)
-	(uint16_t, header_paragraphs)
-	(uint16_t, min_extra_paragraphs)
-	(uint16_t, max_extra_paragraphs)
-	(uint16_t, ss)
-	(uint16_t, sp)
-	(uint16_t, checksum)
-	(uint16_t, ip)
-	(uint16_t, cs)
-	(uint16_t, reloc_table_offset)
-	(uint16_t, overlay_number)
-)
-
-template<typename T>
-T parse(std::istream& is, std::string name);
-
-template<>
-uint16_t parse<uint16_t>(std::istream& is, std::string name) {
-	if(!is) {
-		throw UnexpectedEOS();
-	}
-	char data[2] = {0, 0};
-	is.read(data, 2);
-	if(!is) {
-		throw UnexpectedEOS(name);
-	}
-	
-	return (((unsigned char) data[1]) << 8) | (unsigned char) data[0];
-}
-
-template<>
-Magic parse<Magic>(std::istream& is, std::string name) {
-	if(!is) {
-		throw UnexpectedEOS();
-	}
-	char data[2];
-	is.read(data, 2);
-	if(!is) {
-		throw UnexpectedEOS(name);
-	}
-	
-	return static_cast<Magic>((data[1] << 8) | data[0]);
-}
-
 template <int... Indices>
-MZHeader parse_mz_file_impl(std::istream& is, indices<Indices...>) {
+MZHeader parse_file_impl(std::istream& is, indices<Indices...>) {
 	
 	return {parse<typename std::decay<typename boost::fusion::result_of::at_c<MZHeader, Indices>::type>::type>(is, boost::fusion::extension::struct_member_name<MZHeader, Indices>::call())...};
 	
 }
 
-MZHeader parse_mz_file(std::istream& is) {
+MZHeader parse_file(std::istream& is) {
 	
 	typedef build_indices<boost::fusion::result_of::size<MZHeader>::value>::type indices;
 	
-	return parse_mz_file_impl(is, indices{});
+	return parse_file_impl(is, indices{});
 }
 
 std::ostream& output_impl(std::ostream& os, MZHeader const&, indices<>) {
 	return os;
 }
 
-template<typename T>
-std::ostream& output(std::ostream& os, T rh) {
-	return os << std::hex << std::setw(sizeof(T) * 2) << std::setfill('0') << rh << std::endl;
-}
-
-std::string to_string(Magic magic) {
-	char* c = reinterpret_cast<char*>(&magic);
-	return std::string(c, sizeof(Magic));
-}
-
-template <>
-std::ostream& output<Magic>(std::ostream& os, Magic m) {
-	return os << std::hex << std::setw(4) << std::setfill('0') << m << " (" << to_string(m) << ")" << std::endl;
-}
-
 template <int I, int... Indices>
 std::ostream& output_impl(std::ostream& os, const MZHeader& header, indices<I, Indices...>) {
-	os << boost::fusion::extension::struct_member_name<MZHeader, I>::call() << ": ";
-	output(os, boost::fusion::at_c<I>(header));
+	os << boost::fusion::extension::struct_member_name<MZHeader, I>::call() << ": " << boost::fusion::at_c<I>(header) << std::endl;
 	return output_impl(os, header, indices<Indices...>{});
 }
 
@@ -114,3 +65,5 @@ std::ostream& operator<<(std::ostream& os, MZHeader const& header)
 	
 	return output_impl(os, header, indices{});
 }
+
+}
-- 
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