X-Git-Url: https://deadsoftware.ru/gitweb?a=blobdiff_plain;f=reader.h;h=136fb4748cd45f9e0f5595f13e02f1e72b708339;hb=e2fd5debfd8b94a6ec77a514962851594f0690f0;hp=cfd4fc53194f1242de4890a369e5765bc086bce5;hpb=4618e826a4ebe5e60e1d2c419fca7da71657bf9b;p=odcread.git

diff --git a/reader.h b/reader.h
index cfd4fc5..136fb47 100644
--- a/reader.h
+++ b/reader.h
@@ -2,12 +2,21 @@
 #define _READER_H_
 
 #include <iostream>
+#include <vector>
 
 #include <oberon.h>
 #include <store.h>
+#include <alien.h>
 
 namespace odc {
 
+struct TypeEntry {
+	const std::string name;
+	INTEGER baseId;
+
+	TypeEntry(const std::string &typeName) : name(typeName), baseId(-1) {}
+};
+
 /**
  * TYPE Reader
  * Reader for Component Pascal values like integers, reals, or sets. A reader contains a Files.Reader, to which it forwards most operations.
@@ -16,6 +25,9 @@ namespace odc {
  */ 
 class Reader {
 private:
+	static const unsigned int TYPENOTFOUND = 1;
+	static const unsigned int ALIENVERSION = 2;
+
 	/*
 	 * rider-: Files.Reader
 	 * The file rider which links a Reader to a file.
@@ -24,7 +36,7 @@ private:
 
 	/*
 	 * cancelled-: BOOLEAN	valid during a Store.Internalize call
-	 * Tells whether the currently executing Internalize has been called by ReadVersion or TurnIntoAlien.
+	 * Tells whether the currently executing Internalize has been cancelled by ReadVersion or TurnIntoAlien.
 	 */
 	bool d_cancelled;
 
@@ -34,8 +46,29 @@ private:
 	 */
 	bool d_readAlien;
 
-	INTEGER d_nextElemId;
-	INTEGER d_nextStoreId;
+	/**
+	 * Cause of current read being alien.
+	 */
+	unsigned int d_cause;
+
+	std::vector<TypeEntry*> d_typeList;
+
+	std::vector<Store*> d_elemList; // FIXME: WTH, why are these different?
+	std::vector<Store*> d_storeList;
+
+	Store *d_store;
+
+	struct ReaderState {
+		/**
+		 * Position of the next store in the current level
+		 */
+		std::streampos next;
+		/**
+		 * Position just after the last read store
+		 */
+		std::streampos end;
+	};
+	ReaderState *d_state;
 
 	public:
 	/**
@@ -98,23 +131,32 @@ private:
 	 * Reads a short character (00X..0FFX).
 	 */ 
 	SHORTCHAR readSChar();
+	void readSChar(SHORTCHAR *buf, size_t len);
 	/* PROCEDURE (VAR rd: Reader) ReadXChar (OUT x: CHAR)
 	 * NEW
 	 * Same as ReadSChar, but has a CHAR-type parameter.
 	 * This procedure is provided to simplify migration from Release 1.2 to 1.3.
-	 * 
+	 */
+	/** 
 	 * PROCEDURE (VAR rd: Reader) ReadChar (OUT x: CHAR)
 	 * NEW
 	 * Reads a character (0000X..0FFFFX).
-	 * 
+	 */ 
+	CHAR readLChar();
+	void readLChar(CHAR *buf, size_t len);
+	/**
 	 * PROCEDURE (VAR rd: Reader) ReadByte (OUT x: BYTE)
 	 * NEW
 	 * Reads a very short integer (-128..127).
-	 * 
+	 */ 
+	BYTE readByte();
+	/**
 	 * PROCEDURE (VAR rd: Reader) ReadSInt (OUT x: SHORTINT)
 	 * NEW
 	 * Reads a short integer (-32768..32767).
-	 * 
+	 */
+	SHORTINT readSInt();
+	/** 
 	 * PROCEDURE (VAR rd: Reader) ReadXInt (OUT x: INTEGER)
 	 * NEW
 	 * Same as ReadSInt, but has an INTEGER-type parameter.
@@ -148,19 +190,24 @@ private:
 	 * PROCEDURE (VAR rd: Reader) ReadSet (OUT x: SET)
 	 * NEW
 	 * Reads a set (32 elements).
-	 * 
+	 */
+	/**
 	 * PROCEDURE (VAR rd: Reader) ReadSString (OUT x: ARRAY OF SHORTCHAR)
 	 * NEW
 	 * Reads a 0X-terminated short string.
 	 * 
 	 * Pre
 	 * invalid index	 LEN(x) > Length(string)
-	 * 
+	 */
+	void readSString(SHORTCHAR *out);
+	/** 
 	 * PROCEDURE (VAR rd: Reader) ReadXString (OUT x: ARRAY OF CHAR)
 	 * NEW
 	 * Same as ReadSString, but has a string-type parameter.
 	 * This procedure is provided to simplify migration from Release 1.2 to 1.3.
-	 * 
+	 */
+	//void readXString(CHAR *out);
+	/** 
 	 * PROCEDURE (VAR rd: Reader) ReadString (OUT x: ARRAY OF CHAR)
 	 * NEW
 	 * Reads a 0X-terminated string.
@@ -210,7 +257,9 @@ private:
 	 * 	rd.cause = alienVersion
 	 * 	rd.cancelled
 	 * 	rd.readAlien
-	 * 
+	 */ 
+	INTEGER readVersion(INTEGER min, INTEGER max);
+	/*
 	 * PROCEDURE (VAR rd: Reader) TurnIntoAlien (cause: INTEGER)
 	 * NEW
 	 * A store which is currently being internalized can turn itself into an alien, e.g., if it has read a component store which is an alien.
@@ -218,29 +267,23 @@ private:
 	 * Pre
 	 * 20	cause > 0
 	 */
+	void turnIntoAlien(int cause);
+
+	bool isCancelled();
 
 	private:
 	Store *readStoreOrElemStore(bool isElem);
 	Store *readNilStore();
 	Store *readLinkStore();
 	Store *readNewLinkStore();
+	void internalizeAlien(Alien *alien, std::streampos down, std::streampos end);
 	
-	/*
-		TypeName* = ARRAY 64 OF CHAR;
-		TypePath* = ARRAY 16 OF TypeName;
-		OpName* = ARRAY 32 OF CHAR;
-	 */
-	inline CHAR *newTypeName() {
-		return new CHAR[64];
-	}
-	inline CHAR **newTypePath() {
-		CHAR **out = new CHAR*[16];
-		for (int i = 0; i < 16; ++i) {
-			out[i] = newTypeName();
-		}
-		return out;
-	}
-	void readPath(CHAR **path);
+	std::string &fixTypeName(std::string &name);
+	TypePath readPath();
+	/**
+	 * Add another component to the current path. If first==true, start a new path.
+	 */
+	void addPathComponent(bool first, const std::string &typeName);
 };
 
 } // namespace odc