X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbinaryparser.cpp;fp=source%2Fbinaryparser.cpp;h=051133f79a32cecb540c021f87b6930f5e168566;hb=3b78eeb8b92dc3524d6a0456b4daf0a0f3dbf813;hp=098a5fd4f96c936cad7aae6bfba31b0627c357ef;hpb=a82776d980239e48d2b509d33b56e77a1ea44dda;p=libs%2Fdatafile.git

diff --git a/source/binaryparser.cpp b/source/binaryparser.cpp
index 098a5fd..051133f 100644
--- a/source/binaryparser.cpp
+++ b/source/binaryparser.cpp
@@ -2,9 +2,11 @@
 #include <sys/param.h>
 #include <msp/core/maputils.h>
 #include <msp/strings/format.h>
+#include "argumentstore.h"
 #include "binaryparser.h"
 #include "binfloat.h"
 #include "input.h"
+#include "loaderaction.h"
 
 using namespace std;
 
@@ -21,31 +23,48 @@ public:
 	virtual ~bad_definition() throw() { }
 };
 
+class nesting_error: public logic_error
+{
+public:
+	nesting_error(const std::string &w):
+		logic_error(w)
+	{ }
+
+	virtual ~nesting_error() throw() { }
+};
+
 
 BinaryParser::BinaryParser(Input &i, const string &s):
 	ParserMode(i, s),
-	float_precision(32)
+	float_precision(32),
+	cur_info(0)
 {
-	dict[-1] = StatementKey("__kwd", "iss");
-	dict[-2] = StatementKey("__str", "is");
-	dict[-3] = StatementKey("__flt", "i");
+	dict[-1] = StatementInfo("__kwd", "iss");
+	dict[-2] = StatementInfo("__str", "is");
+	dict[-3] = StatementInfo("__flt", "i");
 }
 
 Statement BinaryParser::parse()
 {
-	int id = parse_int();
-	if(!in)
-		return Statement();
+	const StatementKey *key;
+	if(cur_info)
+		key = &cur_info->key;
+	else
+	{
+		int id = parse_int();
+		if(!in)
+			return Statement();
 
-	const StatementKey &key = get_item(dict, id);
+		key = &get_item(dict, id).key;
+	}
 
 	Statement result;
-	result.keyword = key.keyword;
+	result.keyword = key->keyword;
 	result.source = src;
 
-	for(unsigned j=0; j<key.signature.size(); ++j)
+	for(unsigned j=0; j<key->signature.size(); ++j)
 	{
-		switch(key.signature[j])
+		switch(key->signature[j])
 		{
 		case IntType::signature:
 			result.args.push_back(parse_int());
@@ -65,11 +84,15 @@ Statement BinaryParser::parse()
 		}
 	}
 
+	if(!sub_remaining.empty())
+		--sub_remaining.back();
+
 	unsigned nsub = parse_int();
 	for(unsigned j = 0; j<nsub; ++j)
 		result.sub.push_back(parse());
 
 	result.valid = true;
+	cur_info = 0;
 
 	return result;
 }
@@ -89,7 +112,7 @@ void BinaryParser::process_control_statement(const Statement &st)
 				if(!valid_signatures[j])
 					throw bad_definition("__kwd");
 
-		dict[id] = StatementKey(kw, args);
+		dict[id] = StatementInfo(kw, args);
 	}
 	else if(st.keyword=="__str")
 	{
@@ -103,6 +126,73 @@ void BinaryParser::process_control_statement(const Statement &st)
 		float_precision = st.args[0].get<unsigned>();
 }
 
+const StatementKey *BinaryParser::peek(unsigned level)
+{
+	if(level>sub_remaining.size())
+		throw nesting_error("bad level");
+	while(level<sub_remaining.size())
+	{
+		// Discard any substatements that haven't been parsed yet
+		for(unsigned i=sub_remaining.back(); i-->0; )
+			parse();
+		sub_remaining.pop_back();
+		cur_info = 0;
+	}
+
+	if(!sub_remaining.empty() && sub_remaining.back()==0)
+	{
+		// No more substatements on this level
+		cur_info = 0;
+		return 0;
+	}
+
+	if(cur_info)
+		return &cur_info->key;
+
+	int id = parse_int();
+	if(!in)
+		return 0;
+
+	cur_info = &get_item(dict, id);
+	return &cur_info->key;
+}
+
+bool BinaryParser::parse_and_load(unsigned level, Loader &ldr, const LoaderAction &act)
+{
+	if(!cur_info && !peek(level))
+		return false;
+
+	ArgumentStore args(*cur_info);
+	for(unsigned i=0; i<cur_info->key.signature.size(); ++i)
+		switch(cur_info->key.signature[i])
+		{
+		case IntType::signature:
+			args.set(i, parse_int());
+			break;
+		case FloatType::signature:
+			args.set(i, parse_float());
+			break;
+		case BoolType::signature:
+			args.set(i, parse_bool());
+			break;
+		case StringType::signature:
+			args.set(i, parse_string());
+			break;
+		case SymbolType::signature:
+			args.set(i, parse_symbol());
+			break;
+		}
+
+	if(!sub_remaining.empty())
+		--sub_remaining.back();
+	sub_remaining.push_back(parse_int());
+	cur_info = 0;
+
+	act.execute(ldr, args);
+
+	return true;
+}
+
 IntType::Store BinaryParser::parse_int()
 {
 	IntType::Store result = 0;