cs-mic

CS-MIC is a .NET library written in C# designed to give developers easy access to expression parsing. For many developers, there is no need to involve complicated settings and formats. With few exposed methods and objects, CS-MIC makes basic expression solving as simple as possible with as little logic required from developers as possible. In fact, one can pull a value with only one line of code.

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Installation

For your convience, CS-MIC is packaged and distributed via nuget. See our instructions on how to get started.

Usage

CS-MIC follows a few basic rules when interpreting user input, but should prove to be fairly straightforward for most developers. While CS-MIC tries to ensure that the order of operations as far as it knows them (parentheses – powers, multiplication, division – addition, subtraction), there may be instances where formatting fails. If this should be noticed, please report it.

Expression Parsing

Operands

+ - Addition

– - Subtraction

* - Multiplication

/ - Division

^ - Raise to a power

% - Modulus

Tokens

:: - Assign a numeric value to a variable.

:= - Assign an equation to a variable.

-> - Assigns a comma delimited array of numbers to an array variable.

Comparison

== - Returns ‘True’ if two values are equal to each other.

> - Returns ‘True’ if a value is greater than another value.

< - Returns ‘True’ if a value is less than another value.

>= - Returns ‘True’ if a value is greater than or equal to another value.

<= - Returns ‘True’ if a value is greater than or equal to another value.

Base Conversion

• Decimal
  • All numbers are interpreted as decimal by default.
• Binary
  • Binary numbers are succeeded by a B, non case sensative.
• Hexadecimal
  • Hexadecimal numbers are preceded by 0x, non case sensative.

Example Input and Output

Input	Output
5 + 5	10
5 * 2	10
1 + 2 * 3	7
(1 + 2) * 3	9
5 / 2	2.5
5 / 0	Attempted to divide by zero.
2 ^ 32	4294967296
x :: 4	4
x :: 6 + 4	10
y := 2^x	(2^x)

Scripting

Rules

• Any valid expression can be computed.
• All computation counts towards the script’s history. This means that once a variable is set inside a script, the variable will remain set until execution of the script is complete.
• Only one command can be executed per line. No token is required to end the command.
• Every code block must be opened and closed with a bracket ( { } ). The only exception is the main code block.

Loops

while - Executes a code block as long as a given condition evaluates to true.

while(bool expression)
{
    CODE BLOCK
}

for - After executing an initial condition, a code block is executed while a condition is met. A final statement is executed at the end of each iteration.

for(* expression, bool condition, * expression)
{
    CODE BLOCK
}

Conditionals

if - Executes a code block if a given condition evaluates to true. An optional else block can follow the if block for execution if the statement evaluates as false.

if(bool expression)
{
    CODE BLOCK
}
else
{
    CODE BLOCK
}

Functions

echo - Displays the output from the proceding expression.

echo: expression

say - Displays a string.

say: “string”

display - Combines strings and expressions to a single line in the output stack.

display: “string”, 12 * 2, “string”, sin(12)

function - Creates a new function with a given name, and any number of expected arguments.

function(newFunction, anyArgumentName)
{
    sin(anyArgumentName) + cos(anyArgumentName)
}

Comments

• Block Tokens
  • Starting token: /*
  • Ending token: */ *Any line falling between block comment tokens will be ignored by the macro builder at execution time.
• Line Tokens
  • //
    • Any line starting with the line token will be ignored by the macro builder at execution time.

Example Script

say: “Fibonacci Sequence”
temp :: 1
y :: 1
echo: y
for(x :: 1, x < 11, x :: temp + y)
{
    echo: x
    temp :: y
    y :: x
}
x :: 1
say: “While Loop”
while(x < 10)
{
    if(x == 5)
    {
        display: “The condition ‘x == 5’ has been met. x = “, x, “.”
    }
    else
    {
        echo: sin(x)
    }
    x :: x + 1
}

Example Script Output

Fibonacci Sequence
1
1
2
3
5
8
13
21
34
55
89
While Loop
0.841470984807897
0.909297426825682
0.141120008059867
-0.756802495307928
The condition ‘x == 5’ has been met. x = 5.
-0.279415498198926
0.656986598718789
0.989358246623382
0.412118485241757

Built In Functions

The following is a list of the internally recognized functions in CS-MIC:

sin(double expression)

Returns the sine value of a given expression.

cos(double expression)

Returns the cosine value of a given expression.

tan(double expression)

Returns the tangent value of a given expression.

round(double expression)

Rounds an expression to the nearest whole number.

sqrt(double expression)

Returns the square root of an expression.

abs(double expression)

Returns the absolute value of a given expression.

exp(double expression)

Returns the constant e raised to a given power.

log(double expression1, double expression2)

Returns the log of expression1 to the base of expression2

precision(double expression1, int expression2)

Returns the value of expression1 to a given precision. For example, precision(12.3456789, 4) will return 12.3456.