Re: new module 'regex-quote'

[Eric Blake]

On 09/18/2010 04:05 PM, Bruno Haible wrote:
> /* regex_quote converts a literal string to a regular expression that will
>     look for this literal string.
>     cflags can be 0 or REG_EXTENDED.
>     If it is 0, the result is a Basic Regular Expression (BRE)
>     
> <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03>.
>     If it is REG_EXTENDED, the result is an Extended Regular Expression (ERE)
>     
> <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04>.
>     The result is not anchored;  if you want it to match only complete lines,
>     you need to add "^" at the beginning of the result and "$" at the end of the
>     result.
>   */
>
> /* Returns the number of bytes needed for the quoted string.  */
> extern size_t regex_quote_length (const char *string, int cflags);

Since we're already passing a flag, can we add another flag that adds 
the ^ and $ anchors?  It's more convenient to do just one malloc (via 
the regex_quote) that also adds the anchors, than it is to have to 
manually call regex_quote_length, increment the result, malloc the 
space, insert the anchors, then call regex_quote_copy.

--
Eric Blake   address@hidden    +1-801-349-2682
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