Hash
Script function

world.Hash

DOC_scripting Read about scripting

Type

Method

Summary

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

Prototype

BSTR Hash(BSTR Text);

DOC_data_types 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.

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

DOC_scripting Scripting
DOC_utils Utilities

Functions

FNC_Base64Decode Base64Decode (Takes a base-64 encoded string and decodes it.)
FNC_Base64Encode Base64Encode (Encodes a string using base-64 encoding.)
FNC_ChangeDir ChangeDir (Changes the MUSHclient working directory)
FNC_CreateGUID CreateGUID (Creates a GUID - Global Unique Identifier)
FNC_EditDistance EditDistance (Returns the Levenshtein Edit Distance between two words)
FNC_ErrorDesc ErrorDesc (Converts a MUSHclient script error code into an human-readable description)
FNC_ExportXML ExportXML (Exports a world item in XML format)
FNC_FixupEscapeSequences FixupEscapeSequences (Converts "escape sequences" like \t to their equivalent codes.)
FNC_FixupHTML FixupHTML (Fixes up text for writing as HTML)
FNC_GenerateName GenerateName (Generates a random character name)
FNC_GetClipboard GetClipboard (Gets the clipboard contents)
FNC_GetScriptTime GetScriptTime (Returns the amount of time spent in script routines)
FNC_GetUniqueID GetUniqueID (Creates a unique ID for general use, or for making Plugin IDs)
FNC_GetUniqueNumber GetUniqueNumber (Returns a unique number)
FNC_Help Help (Shows help for a script function, or a list of functions)
FNC_ImportXML ImportXML (Imports configuration data in XML format)
FNC_Metaphone Metaphone (Returns the metaphone code for the supplied word)
FNC_MtRand MtRand (Returns pseudo-random number using the Mersenne Twister algorithm)
FNC_MtSrand MtSrand (Seed the Mersenne Twister pseudo-random number generator)
FNC_ReadNamesFile ReadNamesFile (Loads in a file for generating character names)
FNC_Replace Replace (Replaces one substring with another)
FNC_SetClipboard SetClipboard (Sets the clipboard contents)
FNC_SetStatus SetStatus (Sets the status line text)
FNC_Simulate Simulate (Simulate input from the MUD, for debugging purposes)
FNC_Sound Sound (Plays a sound)
FNC_StripANSI StripANSI (Strips ANSI colour sequences from a string)
FNC_Trace Trace (Trace mode property)
FNC_TraceOut TraceOut (Outputs the supplied message to the world Trace)
FNC_TranslateGerman TranslateGerman (Translate German umluat sequences)
FNC_Transparency Transparency (Sets the transparency of the main MUSHclient window under Windows XP)
FNC_Trim Trim (Trims leading and trailing spaces from a string)

(Help topic: function=Hash)

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