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Full Discussion: Masking algorithm
Top Forums Shell Programming and Scripting Masking algorithm Post 302951089 by n78298 on Sunday 2nd of August 2015 03:07:32 AM
Old 08-02-2015
This is not an assignment; this is a real time challenge. Apologies for not articulating problem in the correct manner and fully explaining the issue.
Maybe calling it a masking solution is not the right thing. My actual requirement is to replace a set of characters with another set of character. That too a character by character replacement so reverse decryption can be easily achieved as well.
As it’s character by character replacement every character will have one and only one replacement character. Hence ABCDE should convert to BCDEF where replacement algorithm is like
Code:
A : B
B : C
C : D
D : E
E : F

The first character to be found and replaced by second character.
 

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XmTextReplaceWcs(library call)											    XmTextReplaceWcs(library call)

NAME
XmTextReplaceWcs -- A Text function that replaces part of a wide character string in a Text widget SYNOPSIS
#include <Xm/Text.h> void XmTextReplaceWcs( Widget widget, XmTextPosition from_pos, XmTextPosition to_pos, wchar_t *wcstring); DESCRIPTION
XmTextReplaceWcs replaces part of the wide character string in the Text widget. The character positions begin at zero and are numbered sequentially from the beginning of the text. An example text replacement would be to replace the second and third characters in the text string. To accomplish this, the from_pos param- eter must be 1 and the to_pos parameter must be 3. To insert a string after the fourth character, both the from_pos and to_pos parameters must be 4. This routine calls the widget's XmNvalueChangedCallback and verification callbacks, either XmNmodifyVerifyCallback or XmNmodifyVerifyCall- backWcs, or both. If both verification callback lists are registered, the procedures of the XmNmodifyVerifyCallback list are executed first and the resulting data is passed to the XmNmodifyVerifyCallbackWcs callbacks. This routine calls the widget's XmNmotionVerifyCallback callback when from_pos is less than or equal to the cursor position. widget Specifies the Text widget ID from_pos Specifies the start position of the text to be replaced to_pos Specifies the end position of the text to be replaced wcstring Specifies the wide character string value to be added to the Text widget For a complete definition of Text and its associated resources, see XmText(3). RELATED
XmText(3) and XmTextReplace(3). XmTextReplaceWcs(library call)
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