|:: Ptr PCRE|
|-> Ptr PCRE_Extra|
Result of study
Length of subject string. (Apparently it does not have to be null terminated?)
Start at this offset in the subject string.
|-> Ptr CInt|
OUT Output vector. Information about matching substrings is stored in this array.
Output vector size
|-> IO CInt|
One more than the highest numbered pair that has been set.