UCalc Fast Math Parser (Delphi edition) 2.95

DLL component which allows programs to evaluate algebraic expressions defined at runtime. Supports user functions and variables. Documentation includes many Delphi examples. Also includes a demonstration Delphi program.
Partial feature list
Speedy parsing and evaluations
Support for .NET, VB, PB, Delphi, VC++, BCB++, and more
Library of standard arithmetic, trigonometric, relational (comparison), and miscellaneous routines (for both numbers and strings). See complete list of operators and functions
User-defined operators and functions, with support for overloading, overshadowing, bootstrapping, or recursion; optional arguments, fixed or indefinite number of arguments; multi-statements separated by semicolons
Function/operator definitions can either be self contained, or attached to routines from your host program or any conventional DLLs such as the Windows API or other
User operator definitions can be infix, prefix, or postfix, and can be given a precedence level; an operator can be alphanumeric or be composed of symbols
User-defined variables (and constants) can be internal, or attached to a variable in your host program, or any valid memory address
A user variable can be defined as a temporary local item
Selected definitions can be locked to prevent redefinition
Supported data types include: Byte, Integer, Long, Dword, Single, Double, Extended, Currency, SortedList, Table, LPCSTR (null-terminated string), FixedLength string, dynamic String, user-defined types, and more
Multi-threading
FPU control
Exception handling (for overflow, division by zero, etc.) and general error handling
User-defined character patterns and syntax constructs
Items (functions, variables, operators, ...) can be renamed, or undefined
uCalc FMP also inherits a host of other features from the uCalc Language Builder