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Top Forums Shell Programming and Scripting How to search and lossless replace strings using sed? Post 303027746 by Mick P. F. on Sunday 23rd of December 2018 06:12:51 AM
Old 12-23-2018
How to search and lossless replace strings using sed?

Hello,


I would like to replace all occurencies of long data types by others (coresponding int) using 'sed' in the extensive source code of a software package written for 32 bit CPUs.
I must use regular expressions to avoid wrong replacements like

Code:
s/unsigned[[:blank:]]+long[^_1-9A-Za-z]/ulong/g

Leaving out the regular expression suffix will also replace variable names starting with 'int' and/or 'long'.

The problem with this is that the detected suffix "[^_1-9A-Za-z]" is also replaced (by an empty string), which destroys the source code.

Is it possible to append/use the detected suffix lossless again using 'sed'?



Thanks in advance,
Michael
 

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GIT-REPLACE(1)							    Git Manual							    GIT-REPLACE(1)

NAME
git-replace - Create, list, delete refs to replace objects SYNOPSIS
git replace [-f] <object> <replacement> git replace -d <object>... git replace -l [<pattern>] DESCRIPTION
Adds a replace reference in refs/replace/ namespace. The name of the replace reference is the SHA-1 of the object that is replaced. The content of the replace reference is the SHA-1 of the replacement object. Unless -f is given, the replace reference must not yet exist. Replacement references will be used by default by all Git commands except those doing reachability traversal (prune, pack transfer and fsck). It is possible to disable use of replacement references for any command using the --no-replace-objects option just after git. For example if commit foo has been replaced by commit bar: $ git --no-replace-objects cat-file commit foo shows information about commit foo, while: $ git cat-file commit foo shows information about commit bar. The GIT_NO_REPLACE_OBJECTS environment variable can be set to achieve the same effect as the --no-replace-objects option. OPTIONS
-f If an existing replace ref for the same object exists, it will be overwritten (instead of failing). -d Delete existing replace refs for the given objects. -l <pattern> List replace refs for objects that match the given pattern (or all if no pattern is given). Typing "git replace" without arguments, also lists all replace refs. BUGS
Comparing blobs or trees that have been replaced with those that replace them will not work properly. And using git reset --hard to go back to a replaced commit will move the branch to the replacement commit instead of the replaced commit. There may be other problems when using git rev-list related to pending objects. And of course things may break if an object of one type is replaced by an object of another type (for example a blob replaced by a commit). SEE ALSO
git-tag(1) git-branch(1) git(1) GIT
Part of the git(1) suite Git 1.8.3.1 06/10/2014 GIT-REPLACE(1)
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