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Hash

Script function

world.Hash

Read about scripting

Type

Method

Summary

Produces a hash (checksum) of a specified piece of text

Prototype

BSTR Hash(BSTR Text);

View list of data type meanings

Description

This produces a 160-bit hash of the supplied text, returned as a 40-character hex string (40 X 4 bits = 160 bits). eg.

world.note world.hash ("This Mud is running on the Dawn Codebase")

c6a948fc8e81baa172a15aa534409b7654861a33

You might use this to store a hash of a long string (eg. a script file) to see if it has changed rather than storing the text itself.

There is no limit to the length of the string that can be hashed.

Because of the way strings are stored this will not work with strings which have nulls in them (hex 00), however see below for a work-around for Lua.


Available in MUSHclient version 3.23 onwards.



VBscript example

world.note world.hash ("This Mud is running on the Dawn Codebase")


Jscript example

world.note (world.hash ("This Mud is running on the Dawn Codebase"));


PerlScript example

$world->note ($world->hash ("This Mud is running on the Dawn Codebase"));


Python example

world.note (world.hash ("This Mud is running on the Dawn Codebase"))


Lua example

Note (Hash("This Mud is running on the Dawn Codebase"))


Lua notes

In MUSHclient version 3.57 onwards you can also use 

hashed_string = utils.hash (s)

This works the same as described above, however it will correctly handle strings with the null (hex 00) character in them.


Return value

A 40-character hexadecimal string which is the hash of the supplied text.


See Also ...

Topics

Scripting
Utilities

Functions

(AddFont) Adds a custom font for use by MUSHclient
(Base64Decode) Takes a base-64 encoded string and decodes it.
(Base64Encode) Encodes a string using base-64 encoding.
(BlendPixel) Blends a single pixel with another, using a specified blending mode
(ChangeDir) Changes the MUSHclient working directory
(CreateGUID) Creates a GUID - Global Unique Identifier
(EditDistance) Returns the Levenshtein Edit Distance between two words
(ErrorDesc) Converts a MUSHclient script error code into an human-readable description
(ExportXML) Exports a world item in XML format
(FilterPixel) Performs a filtering operation on one pixel
(FixupEscapeSequences) Converts "escape sequences" like \t to their equivalent codes.
(FixupHTML) Fixes up text for writing as HTML
(FlashIcon) Flashes the MUSHclient icon on the Windows taskbar
(GenerateName) Generates a random character name
(GetClipboard) Gets the clipboard contents
(GetScriptTime) Returns the amount of time spent in script routines
(GetSoundStatus) Gets the status of a sound started by PlaySound
(GetUniqueID) Creates a unique ID for general use, or for making Plugin IDs
(GetUniqueNumber) Returns a unique number
(Help) Shows help for a script function, or a list of functions
(ImportXML) Imports configuration data in XML format
(Menu) Creates a pop-up menu inside the command window
(Metaphone) Returns the metaphone code for the supplied word
(MoveMainWindow) Move and resize the main MUSHclient window
(MoveWorldWindow) Move and resize a world window
(MoveWorldWindowX) Move and resize a specific world window
(MtRand) Returns pseudo-random number using the Mersenne Twister algorithm
(MtSrand) Seed the Mersenne Twister pseudo-random number generator
(PlaySound) Plays a sound using DirectSound
(ReadNamesFile) Loads in a file for generating character names
(Replace) Replaces one substring with another
(SetBackgroundColour) Sets a background colour for the output window
(SetBackgroundImage) Sets a background image for the output window
(SetClipboard) Sets the clipboard contents
(SetForegroundImage) Sets a foreground image for the output window
(SetMainTitle) Sets the main output window title
(SetStatus) Sets the status line text
(SetTitle) Sets the world window title
(SetToolBarPosition) Sets the position of the game toolbars on the screen.
(ShiftTabCompleteItem) Adds an item to the list shown for Shift+Tab completion
(Simulate) Simulate input from the MUD, for debugging purposes
(Sound) Plays a sound
(StopSound) Stop playing a sound started by PlaySound
(StripANSI) Strips ANSI colour sequences from a string
(Trace) Trace mode property
(TraceOut) Outputs the supplied message to the world Trace
(TranslateDebug) Sends a debugging message to the localizing translator script
(TranslateGerman) Translate German umluat sequences
(Transparency) Sets the transparency of the main MUSHclient window under Windows XP
(Trim) Trims leading and trailing spaces from a string

(Help topic: function=Hash)

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