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Full Discussion: ksh and hex numbers
Top Forums Shell Programming and Scripting ksh and hex numbers Post 302158196 by gus2000 on Monday 14th of January 2008 06:03:30 PM
Old 01-14-2008
The prefix "NNN#" in front of a number indicates the numeric base. From the ksh man page:

Quote:
Constants take the form [base#]n, where base is a decimal number
between two and thirty-six representing the arithmetic base and n is a
number in that base. If base is omitted, base 10 is used.
The typeset options are "-i" for "integer", and "-u" for "uppercase". But, since A was already typed as a hex integer, $a was converted.

The final step removes the leading base indicator. If you echo a constant that is not base 10, the base is printed.

Code:
# x=123:abc
# echo ${x#123:}        # trim from the left
ABC
# echo ${x%:ABC}        # trim from the right
123

 

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LEARN ABOUT OSX

rebase

rebase(1)						    BSD General Commands Manual 						 rebase(1)

NAME

     rebase -- Changes base address of dylibs and bundles

SYNOPSIS

     rebase [-low_address addr] [-high_address addr] [-arch arch] [-v] file(s)

DESCRIPTION

     The base address of an image (dylib or bundle) is the preferred address for it to be loaded.  By default all images are built with a base
     address of zero.  At runtime, if the preferred memory range is already occupied, dyld will "slide" the image to a new address range.  There
     is a small cost to the slide, as dyld must do some fix ups.  The rebase tool takes a list of images and adjust their base address to be non-
     overlapping. If no low or high address is specified, the a suitable address range is choosen for the architecture.

     The options are as follows:

     -low_address addr
	     Force the base address for the first image to be addr (specified in hex). Each subsequent file gets the next available base address.

     -high_address addr
	     Force the base address for the last image to be such that when that image is loaded it occupies memory up to addr (specified in hex).
	     Each preceeding file gets the previous available base address.

     -arch arch
	     Only rebase the specified architecture.  Other architectures in a universal image are left as is.

     -v      Verbose. Print information about rebasing done.

SEE ALSO

     ld(1)

Darwin								   June 6, 2006 							    Darwin
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