Reversebytes: Difference between revisions

Revision as of 11:56, 9 October 2008

Flips order of bytes in a word.

res = reversebytes(y,totalbytes,base)

Generalized reversal of bytes. Note that the default is to swap 2 hex bytes in a 16 bit number.

To swap 4 bytes in a 32 bit number:

reversebytes(y,4)

To swap 2 words in a 32 bit number:

reversebytes(y,2,2\^16)

@@ Line 1: / Line 1: @@
 ===Purpose===
@@ Line 10: / Line 9: @@
 ===Description===
-Generalized reversal of bytes. Inputs are y, the value(s) to operate on, the total number of bytes to swap totalbytes {default = 2} in each word, and the number base to work in base {default = 2\^8 = 256 = 1 hex byte}. Note that the default is to swap 2 hex bytes in a 16 bit number.
+Generalized reversal of bytes. Note that the default is to swap 2 hex bytes in a 16 bit number.
+====Inputs====
+* '''y''' = the input value(s) to operate on
+* '''totalbytes''' = the total number of bytes to swap
+* '''base''' = the number base to work in {default = 2\^8 = 256 = 1 hex byte}
+====Outputs====
+* '''res''' = result of byte reversal on input '''y'''
 ===Examples===
-To swap 4 BYTES in a 32 bit number:
+To swap 4 '''bytes''' in a 32 bit number:
 :reversebytes(y,4)
-To swap 2 WORDS in a 32 bit number:
+To swap 2 '''words''' in a 32 bit number:
 :reversebytes(y,2,2\^16)