* [Bug tapsets/20988] New: string tapset could use a strstr() type function
@ 2016-12-21 22:03 dsmith at redhat dot com
2016-12-21 22:05 ` [Bug tapsets/20988] " fche at redhat dot com
2017-04-10 3:48 ` mcermak at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: dsmith at redhat dot com @ 2016-12-21 22:03 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=20988
Bug ID: 20988
Summary: string tapset could use a strstr() type function
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: tapsets
Assignee: systemtap at sourceware dot org
Reporter: dsmith at redhat dot com
Target Milestone: ---
The string tapset has a function called 'instr()' that tells you if a substring
is present in a string, but the caller doesn't know where that substring is in
the string. It would be nice to have a tapset function that returns the index
of where a substring starts in a string. Then you could use the 'substr()'
tapset function to extract the string parts before and after a substring.
If the substring doesn't exist in string, the new tapset function should raise
an error.
Here's an example in action:
# You've got a string that is in the general format 'FIRST.LAST'.
# You want to break that string down into its parts.
full = "David.Smith"
# Find the index of the '.' character
index = NEW_FUNCTION(full, ".")
# Extract the first part of the string
first = substr(full, 0, index)
# Extract the last part of the string
last = substr(full, index + 1, strlen(full) - index - 1)
(I haven't checked all the indexing logic in the above example, but the idea is
there.)
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* [Bug tapsets/20988] string tapset could use a strstr() type function
2016-12-21 22:03 [Bug tapsets/20988] New: string tapset could use a strstr() type function dsmith at redhat dot com
@ 2016-12-21 22:05 ` fche at redhat dot com
2017-04-10 3:48 ` mcermak at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2016-12-21 22:05 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=20988
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fche at redhat dot com
--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> ---
See also function::tokenize() and bug #15065.
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* [Bug tapsets/20988] string tapset could use a strstr() type function
2016-12-21 22:03 [Bug tapsets/20988] New: string tapset could use a strstr() type function dsmith at redhat dot com
2016-12-21 22:05 ` [Bug tapsets/20988] " fche at redhat dot com
@ 2017-04-10 3:48 ` mcermak at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: mcermak at redhat dot com @ 2017-04-10 3:48 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=20988
Martin Cermak <mcermak at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mcermak at redhat dot com
Assignee|systemtap at sourceware dot org |mcermak at redhat dot com
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You are receiving this mail because:
You are the assignee for the bug.
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2016-12-21 22:03 [Bug tapsets/20988] New: string tapset could use a strstr() type function dsmith at redhat dot com
2016-12-21 22:05 ` [Bug tapsets/20988] " fche at redhat dot com
2017-04-10 3:48 ` mcermak at redhat dot com
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