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.
---
 binparse/binparse.cpp | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 binparse/binparse.cpp

(limited to 'binparse/binparse.cpp')

diff --git a/binparse/binparse.cpp b/binparse/binparse.cpp
new file mode 100644
index 0000000..1dc4fc6
--- /dev/null
+++ b/binparse/binparse.cpp
@@ -0,0 +1,132 @@
+
+#include "binparse.hpp"
+
+namespace binparse {
+
+UnexpectedEOS::UnexpectedEOS()
+: std::runtime_error("Unexpected end of stream.")
+{}
+
+UnexpectedEOS::UnexpectedEOS(std::__cxx11::string location)
+: std::runtime_error("Unexpected end of stream after " + location)
+{}
+
+template<>
+uint8_t parse<uint8_t>(std::istream& is, std::string name) {
+	if(!is) {
+		throw UnexpectedEOS();
+	}
+	char data = 0;
+	is.read(&data, 1);
+	if(!is) {
+		throw UnexpectedEOS(name);
+	}
+	
+	return (unsigned char) data;
+}
+
+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<>
+uint32_t parse<uint32_t>(std::istream& is, std::string name) {
+	if(!is) {
+		throw UnexpectedEOS();
+	}
+	char data[4] = {0, 0};
+	is.read(data, sizeof(data));
+	if(!is) {
+		throw UnexpectedEOS(name);
+	}
+	
+	return (
+		  ((unsigned char) data[3]) << 24
+		| ((unsigned char) data[2]) << 16
+		| ((unsigned char) data[1]) << 8
+		| ((unsigned char) data[0])
+	);
+}
+
+template<>
+Value8 parse<Value8>(std::istream& is, std::string name) {
+	return Value8(parse<uint8_t>(is, name));
+}
+
+template<>
+Value16 parse<Value16>(std::istream& is, std::string name) {
+	return Value16(parse<uint16_t>(is, name));
+}
+
+template<>
+Magic16 parse<Magic16>(std::istream& is, std::string name) {
+	return Magic16(parse<uint16_t>(is, name));
+}
+
+template<>
+Offset16 parse<Offset16>(std::istream& is, std::string name) {
+	return Offset16(parse<uint16_t>(is, name));
+}
+
+template<>
+Value32 parse<Value32>(std::istream& is, std::string name) {
+	return Value32(parse<uint32_t>(is, name));
+}
+
+template<>
+Offset32 parse<Offset32>(std::istream& is, std::string name) {
+	return Offset32(parse<uint32_t>(is, name));
+}
+
+std::string to_string(Magic16 magic) {
+	char* c = reinterpret_cast<char*>(&magic);
+	return std::string(c, sizeof(Magic16));
+}
+
+std::ostream& operator<<(std::ostream& os, uint8_t i) {
+	return os << (unsigned int) i;
+}
+
+std::ostream& operator<<(std::ostream& os, Value8 v)
+{
+	return os << std::dec << static_cast<uint8_t>(v);
+}
+
+std::ostream& operator<<(std::ostream& os, Offset8 o)
+{
+	return os << std::hex << std::setw(2) << std::setfill('0') << static_cast<uint8_t>(o);
+}
+
+std::ostream& operator<<(std::ostream& os, Magic16 m) {
+	return os << std::hex << std::setw(4) << std::setfill('0') << static_cast<uint16_t>(m) << " (" << to_string(m) << ")";
+}
+
+std::ostream& operator<<(std::ostream& os, Value16 v) {
+	return os << std::dec << static_cast<uint16_t>(v);
+}
+
+std::ostream& operator<<(std::ostream& os, Offset16 o) {
+	return os << std::hex << std::setw(sizeof(o) * 2) << std::setfill('0') << static_cast<uint16_t>(o);
+}
+
+std::ostream& operator<<(std::ostream& os, Value32 v) {
+	return os << std::dec << static_cast<uint32_t>(v);
+}
+
+std::ostream& operator<<(std::ostream& os, Offset32 o) {
+	return os << std::hex << std::setw(sizeof(o) * 2) << std::setfill('0') << static_cast<uint32_t>(o);
+}
+
+}
\ No newline at end of file
-- 
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