merge changes for storm-1315

5 files changed, 452 insertions, 0 deletions

diff --git a/indra/llmath/CMakeLists.txt b/indra/llmath/CMakeLists.txt
index 9dadad7dd3..cd100cdf9f 100644
--- a/indra/llmath/CMakeLists.txt
+++ b/indra/llmath/CMakeLists.txt
@@ -12,6 +12,8 @@ include_directories(
 set(llmath_SOURCE_FILES
     llbbox.cpp
     llbboxlocal.cpp
+    llcalc.cpp
+    llcalcparser.cpp
     llcamera.cpp
     llcoordframe.cpp
     llline.cpp
@@ -46,6 +48,8 @@ set(llmath_HEADER_FILES
     coordframe.h
     llbbox.h
     llbboxlocal.h
+    llcalc.h
+    llcalcparser.h
     llcamera.h
     llcoord.h
     llcoordframe.h
diff --git a/indra/llmath/llcalc.cpp b/indra/llmath/llcalc.cpp
new file mode 100644
index 0000000000..597d0815fb
--- /dev/null
+++ b/indra/llmath/llcalc.cpp
@@ -0,0 +1,145 @@
+/*
+ *  LLCalc.cpp
+ *  SecondLife
+ *
+ *  Created by Aimee Walton on 28/09/2008.
+ *  Copyright 2008 Aimee Walton.
+ *
+ */
+
+#include "linden_common.h"
+
+#include "llcalc.h"
+
+#include "llcalcparser.h"
+#include "llmath.h"
+
+
+// Variable names for use in the build floater
+const char* LLCalc::X_POS = "PX";
+const char* LLCalc::Y_POS = "PY";
+const char* LLCalc::Z_POS = "PZ";
+const char* LLCalc::X_SCALE = "SX";
+const char* LLCalc::Y_SCALE = "SY";
+const char* LLCalc::Z_SCALE = "SZ";
+const char* LLCalc::X_ROT = "RX";
+const char* LLCalc::Y_ROT = "RY";
+const char* LLCalc::Z_ROT = "RZ";
+const char* LLCalc::HOLLOW = "HLW";
+const char* LLCalc::CUT_BEGIN = "CB";
+const char* LLCalc::CUT_END = "CE";
+const char* LLCalc::PATH_BEGIN = "PB";
+const char* LLCalc::PATH_END = "PE";
+const char* LLCalc::TWIST_BEGIN = "TB";
+const char* LLCalc::TWIST_END = "TE";
+const char* LLCalc::X_SHEAR = "SHX";
+const char* LLCalc::Y_SHEAR = "SHY";
+const char* LLCalc::X_TAPER = "TPX";
+const char* LLCalc::Y_TAPER = "TPY";
+const char* LLCalc::RADIUS_OFFSET = "ROF";
+const char* LLCalc::REVOLUTIONS = "REV";
+const char* LLCalc::SKEW = "SKW";
+const char* LLCalc::X_HOLE = "HLX";
+const char* LLCalc::Y_HOLE = "HLY";
+const char* LLCalc::TEX_U_SCALE = "TSU";
+const char* LLCalc::TEX_V_SCALE = "TSV";
+const char* LLCalc::TEX_U_OFFSET = "TOU";
+const char* LLCalc::TEX_V_OFFSET = "TOV";
+const char* LLCalc::TEX_ROTATION = "TROT";
+const char* LLCalc::TEX_TRANSPARENCY = "TRNS";
+const char* LLCalc::TEX_GLOW = "GLOW";
+
+
+LLCalc* LLCalc::sInstance = NULL;
+
+LLCalc::LLCalc() : mLastErrorPos(0)
+{
+	// Init table of constants
+	mConstants["PI"] = F_PI;
+	mConstants["TWO_PI"] = F_TWO_PI;
+	mConstants["PI_BY_TWO"] = F_PI_BY_TWO;
+	mConstants["SQRT_TWO_PI"] = F_SQRT_TWO_PI;
+	mConstants["SQRT2"] = F_SQRT2;
+	mConstants["SQRT3"] = F_SQRT3;
+	mConstants["DEG_TO_RAD"] = DEG_TO_RAD;
+	mConstants["RAD_TO_DEG"] = RAD_TO_DEG;
+	mConstants["GRAVITY"] = GRAVITY;
+}
+
+LLCalc::~LLCalc()
+{
+}
+
+//static
+void LLCalc::cleanUp()
+{
+	delete sInstance;
+	sInstance = NULL;
+}
+
+//static
+LLCalc* LLCalc::getInstance()
+{
+    if (!sInstance)	sInstance = new LLCalc();
+	return sInstance;
+}
+
+void LLCalc::setVar(const std::string& name, const F32& value)
+{
+	mVariables[name] = value;
+}
+
+void LLCalc::clearVar(const std::string& name)
+{
+	mVariables.erase(name);
+}
+
+void LLCalc::clearAllVariables()
+{
+	mVariables.clear();
+}
+
+/*
+void LLCalc::updateVariables(LLSD& vars)
+{
+	LLSD::map_iterator cIt = vars.beginMap();
+	for(; cIt != vars.endMap(); cIt++)
+	{
+		setVar(cIt->first, (F32)(LLSD::Real)cIt->second);
+	}
+}
+*/
+
+bool LLCalc::evalString(const std::string& expression, F32& result)
+{
+	std::string expr_upper = expression;
+	LLStringUtil::toUpper(expr_upper);
+	
+	LLCalcParser calc(result, &mConstants, &mVariables);
+
+	mLastErrorPos = 0;
+	std::string::iterator start = expr_upper.begin();
+ 	parse_info<std::string::iterator> info;
+	
+	try
+	{
+		info = parse(start, expr_upper.end(), calc, space_p);
+		lldebugs << "Math expression: " << expression << " = " << result << llendl;
+	}
+	catch(parser_error<std::string, std::string::iterator> &e)
+	{
+		mLastErrorPos = e.where - expr_upper.begin();
+		
+		llinfos << "Calc parser exception: " << e.descriptor << " at " << mLastErrorPos << " in expression: " << expression << llendl;
+		return false;
+	}
+	
+	if (!info.full)
+	{
+		mLastErrorPos = info.stop - expr_upper.begin();
+		llinfos << "Unhandled syntax error at " << mLastErrorPos << " in expression: " << expression << llendl;
+		return false;
+	}
+	
+	return true;
+}
diff --git a/indra/llmath/llcalc.h b/indra/llmath/llcalc.h
new file mode 100644
index 0000000000..cc31950cb6
--- /dev/null
+++ b/indra/llmath/llcalc.h
@@ -0,0 +1,83 @@
+/*
+ *  LLCalc.h
+ *  SecondLife
+ *
+ *  Created by Aimee Walton on 28/09/2008.
+ *  Copyright 2008 Aimee Walton.
+ *
+ */
+
+#ifndef LL_CALC_H
+#define LL_CALC_H
+
+#include <map>
+#include <string>
+
+class LLCalc
+{
+public:
+	LLCalc();
+	~LLCalc();
+
+	// Variable name constants
+	static const char* X_POS;
+	static const char* Y_POS;
+	static const char* Z_POS;
+	static const char* X_SCALE;
+	static const char* Y_SCALE;
+	static const char* Z_SCALE;
+	static const char* X_ROT;
+	static const char* Y_ROT;
+	static const char* Z_ROT;
+	static const char* HOLLOW;
+	static const char* CUT_BEGIN;
+	static const char* CUT_END;
+	static const char* PATH_BEGIN;
+	static const char* PATH_END;
+	static const char* TWIST_BEGIN;
+	static const char* TWIST_END;
+	static const char* X_SHEAR;
+	static const char* Y_SHEAR;
+	static const char* X_TAPER;
+	static const char* Y_TAPER;
+	static const char* RADIUS_OFFSET;
+	static const char* REVOLUTIONS;
+	static const char* SKEW;
+	static const char* X_HOLE;
+	static const char* Y_HOLE;
+	static const char* TEX_U_SCALE;
+	static const char* TEX_V_SCALE;
+	static const char* TEX_U_OFFSET;
+	static const char* TEX_V_OFFSET;
+	static const char* TEX_ROTATION;
+	static const char* TEX_TRANSPARENCY;
+	static const char* TEX_GLOW;
+
+	void	setVar(const std::string& name, const F32& value);
+	void	clearVar(const std::string& name);
+	void	clearAllVariables();
+//	void	updateVariables(LLSD& vars);
+
+	bool	evalString(const std::string& expression, F32& result);
+	std::string::size_type	getLastErrorPos()	{ return mLastErrorPos; }
+	
+	static LLCalc* getInstance();
+	static void cleanUp();
+
+	typedef	std::map<std::string, F32> calc_map_t;
+	
+private:
+	std::string::size_type	mLastErrorPos;
+	
+	calc_map_t	mConstants;
+	calc_map_t	mVariables;
+	
+	// *TODO: Add support for storing user defined variables, and stored functions.
+	//	Will need UI work, and a means to save them between sessions.
+//	calc_map_t mUserVariables;
+	
+	// "There shall be only one"
+	static LLCalc*	sInstance;
+};
+
+#endif // LL_CALC_H
diff --git a/indra/llmath/llcalcparser.cpp b/indra/llmath/llcalcparser.cpp
new file mode 100644
index 0000000000..fd55376fa9
--- /dev/null
+++ b/indra/llmath/llcalcparser.cpp
@@ -0,0 +1,46 @@
+/*
+ *  LLCalcParser.cpp
+ *  SecondLife
+ *
+ *  Created by Aimee Walton on 28/09/2008.
+ *  Copyright 2008 Aimee Walton.
+ *
+ */
+
+#include "linden_common.h"
+
+#include "llcalcparser.h"
+using namespace boost::spirit::classic;
+
+F32 LLCalcParser::lookup(const std::string::iterator& start, const std::string::iterator& end) const
+{
+	LLCalc::calc_map_t::iterator iter;
+
+	std::string name(start, end);
+	
+	if (mConstants)
+	{
+		iter = mConstants->find(name);
+		if (iter != mConstants->end())
+		{
+			return (*iter).second;
+		}
+	}
+	else
+	{
+		// This should never happen!
+		throw_(end, std::string("Missing constants table"));
+	}
+	
+	if (mVariables)
+	{
+		iter = mVariables->find(name);
+		if (iter != mVariables->end())
+		{
+			return (*iter).second;
+		}
+	}
+	
+	throw_(end, std::string("Unknown symbol " + name));
+	return 0.f;
+}
diff --git a/indra/llmath/llcalcparser.h b/indra/llmath/llcalcparser.h
new file mode 100644
index 0000000000..600e173661
--- /dev/null
+++ b/indra/llmath/llcalcparser.h
@@ -0,0 +1,174 @@
+/*
+ *  LLCalcParser.h
+ *  SecondLife
+ *
+ *  Created by Aimee Walton on 28/09/2008.
+ *  Copyright 2008 Aimee Walton.
+ *
+ */
+
+#ifndef LL_CALCPARSER_H
+#define LL_CALCPARSER_H
+
+#include <boost/spirit/include/classic_attribute.hpp>
+#include <boost/spirit/include/classic_core.hpp>
+#include <boost/spirit/include/classic_error_handling.hpp>
+#include <boost/spirit/include/classic_position_iterator.hpp>
+#include <boost/spirit/include/phoenix1_binders.hpp>
+#include <boost/spirit/include/classic_symbols.hpp>
+using namespace boost::spirit::classic;
+
+#include "llcalc.h"
+#include "llmath.h"
+
+struct LLCalcParser : grammar<LLCalcParser>
+{
+	LLCalcParser(F32& result, LLCalc::calc_map_t* constants, LLCalc::calc_map_t* vars) :
+		mResult(result), mConstants(constants), mVariables(vars) {};
+	
+	struct value_closure : closure<value_closure, F32>
+	{
+		member1 value;
+	};
+	
+	template <typename ScannerT>
+	struct definition
+	{
+		// Rule declarations
+		rule<ScannerT> statement, identifier;
+		rule<ScannerT, value_closure::context_t> expression, term,
+			power, 
+			unary_expr, 
+			factor, 
+			unary_func, 
+			binary_func,
+			group;
+
+		// start() should return the starting symbol
+		rule<ScannerT> const& start() const { return statement; }
+		
+		definition(LLCalcParser const& self)
+		{
+			using namespace phoenix;
+			
+			assertion<std::string> assert_domain("Domain error");
+//			assertion<std::string> assert_symbol("Unknown symbol");
+			assertion<std::string> assert_syntax("Syntax error");
+			
+			identifier =
+				lexeme_d[(alpha_p | '_') >> *(alnum_p | '_')]
+			;
+			
+			group =
+				'(' >> expression[group.value = arg1] >> assert_syntax(ch_p(')'))
+			;
+
+			unary_func =
+				((str_p("SIN") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_sin)(self,arg1)]) |
+				 (str_p("COS") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_cos)(self,arg1)]) |
+				 (str_p("TAN") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_tan)(self,arg1)]) |
+				 (str_p("ASIN") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_asin)(self,arg1)]) |
+				 (str_p("ACOS") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_acos)(self,arg1)]) |
+				 (str_p("ATAN") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_atan)(self,arg1)]) |
+				 (str_p("SQRT") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_sqrt)(self,arg1)]) |
+				 (str_p("LOG") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_log)(self,arg1)]) |
+				 (str_p("EXP") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_exp)(self,arg1)]) |
+				 (str_p("ABS") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_fabs)(self,arg1)]) |
+				 (str_p("FLR") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_floor)(self,arg1)]) |
+				 (str_p("CEIL") >> '(' >> expression[unary_func.value = bind(&LLCalcParser::_ceil)(self,arg1)])
+				) >> assert_syntax(ch_p(')'))
+			;
+			
+			binary_func =
+				((str_p("ATAN2") >> '(' >> expression[binary_func.value = arg1] >> ',' >>
+				  expression[binary_func.value = bind(&LLCalcParser::_atan2)(self, binary_func.value, arg1)]) |
+				 (str_p("MIN") >> '(' >> expression[binary_func.value = arg1] >> ',' >> 
+				  expression[binary_func.value = bind(&LLCalcParser::_min)(self, binary_func.value, arg1)]) |
+				 (str_p("MAX") >> '(' >> expression[binary_func.value = arg1] >> ',' >> 
+				  expression[binary_func.value = bind(&LLCalcParser::_max)(self, binary_func.value, arg1)])
+				) >> assert_syntax(ch_p(')'))
+			;
+			
+			// *TODO: Localisation of the decimal point?
+			// Problem, LLLineEditor::postvalidateFloat accepts a comma when appropriate
+			// for the current locale. However to do that here could clash with using
+			// the comma as a separator when passing arguments to functions.
+			factor =
+				(ureal_p[factor.value = arg1] |
+				 group[factor.value = arg1] |
+				 unary_func[factor.value = arg1] |
+				 binary_func[factor.value = arg1] |
+				 // Lookup throws an Unknown Symbol error if it is unknown, while this works fine,
+				 // would be "neater" to handle symbol lookup from here with an assertive parser.
+//				 constants_p[factor.value = arg1]|
+				 identifier[factor.value = bind(&LLCalcParser::lookup)(self, arg1, arg2)]
+				) >>
+				// Detect and throw math errors.
+				assert_domain(eps_p(bind(&LLCalcParser::checkNaN)(self, factor.value)))
+			;
+
+			unary_expr =
+				!ch_p('+') >> factor[unary_expr.value = arg1] |
+				'-' >> factor[unary_expr.value = -arg1]
+			;
+			
+			power =
+				unary_expr[power.value = arg1] >>
+				*('^' >> assert_syntax(unary_expr[power.value = bind(&powf)(power.value, arg1)]))
+			;
+			
+			term =
+				power[term.value = arg1] >>
+				*(('*' >> assert_syntax(power[term.value *= arg1])) |
+				  ('/' >> assert_syntax(power[term.value /= arg1])) |
+				  ('%' >> assert_syntax(power[term.value = bind(&fmodf)(term.value, arg1)]))
+				)
+			;
+			
+			expression =
+				assert_syntax(term[expression.value = arg1]) >>
+				*(('+' >> assert_syntax(term[expression.value += arg1])) |
+				  ('-' >> assert_syntax(term[expression.value -= arg1]))
+				)
+			;
+
+			statement =
+				!ch_p('=') >> ( expression )[var(self.mResult) = arg1] >> (end_p)
+			;
+		}
+	};
+	
+private:
+	// Member functions for semantic actions
+	F32	lookup(const std::string::iterator&, const std::string::iterator&) const;
+	F32 _min(const F32& a, const F32& b) const { return llmin(a, b); }
+	F32 _max(const F32& a, const F32& b) const { return llmax(a, b); }
+	
+	bool checkNaN(const F32& a) const { return !llisnan(a); }
+	
+	//FIX* non ambigious function fix making SIN() work for calc -Cryogenic Blitz
+	F32 _sin(const F32& a) const { return sin(DEG_TO_RAD * a); }
+	F32 _cos(const F32& a) const { return cos(DEG_TO_RAD * a); }
+	F32 _tan(const F32& a) const { return tan(DEG_TO_RAD * a); }
+	F32 _asin(const F32& a) const { return asin(a * RAD_TO_DEG); }
+	F32 _acos(const F32& a) const { return acos(a * RAD_TO_DEG); }
+	F32 _atan(const F32& a) const { return atan(a * RAD_TO_DEG); }
+	F32 _sqrt(const F32& a) const { return sqrt(a); }
+	F32 _log(const F32& a) const { return log(a); }
+	F32 _exp(const F32& a) const { return exp(a); }
+	F32 _fabs(const F32& a) const { return fabs(a); }
+	F32 _floor(const F32& a) const { return llfloor(a); }
+	F32 _ceil(const F32& a) const { return llceil(a); }
+
+	F32 _atan2(const F32& a,const F32& b) const { return atan2(a,b); }
+
+
+
+	LLCalc::calc_map_t* mConstants;
+	LLCalc::calc_map_t* mVariables;
+//	LLCalc::calc_map_t* mUserVariables;
+	
+	F32&		mResult;
+};
+
+#endif // LL_CALCPARSER_H