Searching for a string in a string

Searching for a string in a string

[Nordlöw]

Is there a variant of string-match() that searches for a string (sub-
string) instead of a regexp?

/Nordlöw

Re: Searching for a string in a string

[Pascal J. Bourguignon]

Nordlöw <per.nordlow@gmail.com> writes:

> Is there a variant of string-match() that searches for a string (sub-
> string) instead of a regexp?

(defun literal-string-match (substring string &optional start)
   (string-match (regexp-quote substring) string (or start 0)))

(literal-string-match "..?" "Hello? world..? ah!") --> 12


-- 
__Pascal Bourguignon__

Re: Searching for a string in a string

[Joost Kremers]

Nordlöw wrote:
> Is there a variant of string-match() that searches for a string (sub-
> string) instead of a regexp?

a string is just a special case of a regexp, so why wouldn't you use
string-match?


-- 
Joost Kremers                                      joostkremers@yahoo.com
Selbst in die Unterwelt dringt durch Spalten Licht
EN:SiS(9)

Re: Searching for a string in a string

[Pascal J. Bourguignon]

Joost Kremers <joostkremers@yahoo.com> writes:

> Nordlöw wrote:
>> Is there a variant of string-match() that searches for a string (sub-
>> string) instead of a regexp?
>
> a string is just a special case of a regexp, so why wouldn't you use
> string-match?

A primitive literal-string-match could be more efficient than a
generic regular expression matching algorithm.  That said, if the
regexp machinery is well optimized, we only lose regexp compilation
time, which in the case of a fully escaped regular expression may be
very fast.

-- 
__Pascal Bourguignon__