The maximum length of a compiled pattern is approximately 64K data units (bytes -for the 8-bit library, 16-bit units for the 16-bit library) if PCRE is compiled -with the default internal linkage size of 2 bytes. If you want to process -regular expressions that are truly enormous, you can compile PCRE with an -internal linkage size of 3 or 4 (when building the 16-bit library, 3 is rounded -up to 4). See the README file in the source distribution and the +for the 8-bit library, 32-bit units for the 32-bit library, and 32-bit units for +the 32-bit library) if PCRE is compiled with the default internal linkage size +of 2 bytes. If you want to process regular expressions that are truly enormous, +you can compile PCRE with an internal linkage size of 3 or 4 (when building the +16-bit or 32-bit library, 3 is rounded up to 4). See the README file in +the source distribution and the pcrebuild documentation for details. In these cases the limit is substantially larger. However, the speed of execution is slower. @@ -49,7 +50,7 @@ maximum number of named subpatterns is 10000.
The maximum length of a name in a (*MARK), (*PRUNE), (*SKIP), or (*THEN) verb -is 255 for the 8-bit library and 65535 for the 16-bit library. +is 255 for the 8-bit library and 65535 for the 16-bit and 32-bit library.
The maximum length of a subject string is the largest positive number that an