diff options
| author | ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15> | 2007-08-09 11:16:34 +0000 |
|---|---|---|
| committer | ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15> | 2007-08-09 11:16:34 +0000 |
| commit | b16e178b28a1f1a43d831648d8836a1de092339c (patch) | |
| tree | 6cd890d9d04f695fc869f514e00530e135ea8fcb /HACKING | |
| parent | 56f7881b1a4124ac28d095f39f0ece0d5561dd5c (diff) | |
| download | pcre-b16e178b28a1f1a43d831648d8836a1de092339c.tar.gz | |
Updating docs for release; fix heap-related bugs in pcre_exec shown up by
release testing.
git-svn-id: svn://vcs.exim.org/pcre/code/trunk@212 2f5784b3-3f2a-0410-8824-cb99058d5e15
Diffstat (limited to 'HACKING')
| -rw-r--r-- | HACKING | 19 |
1 files changed, 13 insertions, 6 deletions
@@ -109,15 +109,15 @@ variable length. The first byte in an item is an opcode, and the length of the item is either implicit in the opcode or contained in the data bytes that follow it. -In many cases below "two-byte" data values are specified. This is in fact just -a default when the number is an offset within the compiled pattern. PCRE can be +In many cases below LINK_SIZE data values are specified for offsets within the +compiled pattern. The default value for LINK_SIZE is 2, but PCRE can be compiled to use 3-byte or 4-byte values for these offsets (impairing the performance). This is necessary only when patterns whose compiled length is greater than 64K are going to be processed. In this description, we assume the -"normal" compilation options. "Two-byte" data values that are counts (e.g. for -quantifiers) are always just two bytes. +"normal" compilation options. Data values that are counts (e.g. for +quantifiers) are always just two bytes long. -A list of all the opcodes follows: +A list of the opcodes follows: Opcodes with no following data ------------------------------ @@ -149,6 +149,13 @@ These items are all just one byte long OP_EXTUNI match an extended Unicode character OP_ANYNL match any Unicode newline sequence + OP_ACCEPT ) + OP_COMMIT ) + OP_FAIL ) These are Perl 5.10's "backtracking + OP_PRUNE ) control verbs". + OP_SKIP ) + OP_THEN ) + Repeating single characters --------------------------- @@ -404,4 +411,4 @@ at compile time, and so does not cause anything to be put into the compiled data. Philip Hazel -June 2007 +August 2007 |