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Merge changes from unicode-string-buffer-impl-branch which gives faster reads on external-formats. This is done by adding an additional buffer to streams so we can convert the entire in-buffer into characters all at once. To build this change, you need to do a cross-compile using boot-2009-10-1-cross.lisp. Using that build, do a normal build with these sources. For a non-unicode build use boot-2009-10-01.lisp with a 20a non-unicode build. code/extfmts.lisp: o Add another slot to the extfmts for copying the state. o Modify EF-OCTETS-TO-STRING and OCTETS-TO-STRING to support the necesssary changes for fast formats. This is incompatible with the previous version because the string is not grown if needed. code/fd-stream-extfmt.lisp: o Set *enable-stream-buffer-p* to T so we have fast streams. code/fd-stream.lisp: o Add new slots to support fast strams. o In SET-ROUTINES, initialize the new slots appropriately. o Update UNREAD-CHAR to be able to back up in the string buffer to unread. o Add implementation to copy the state of an external format. code/stream.lisp: o Change %SET-FD-STREAM-EXTERNAL-FORMAT to be able to change formats even if we've already converted the buffer with a different format. We reconvert the buffer with the old format until we reach the current character. Then the remaining octets are converted using the new format and stored in the string buffer. o Add FAST-READ-CHAR-STRING-REFILL to refill the string buffer, like FAST-READ-CHAR-REFILL does for the octet in-buffer. code/struct.lisp: o Add new slots to hold the string buffer, the current index, and length. These are needed for the fast formats. code/sysmacs.lisp: o Update PREPARE-FOR-FAST-READ-CHAR, DONE-WITH-FAST-READ-CHAR, and FAST-READ-CHAR to support the string buffer. code/string.lisp: o Microoptimization of SURROGATEP to reduce the number of branchs. general-info/release-20b.txt: o Update with these changes pcl/simple-streams/external-formats/utf-16-be.lisp: pcl/simple-streams/external-formats/utf-16-le.lisp: pcl/simple-streams/external-formats/utf-16.lisp: o These formats actually have state, so update them to take a handle an initial state. These are needed if the string buffer ends with a leading surrogate and the next string buffer starts with a trailing surrogate. The conversion needs to combine the surrogates together.
extfmts.lisp: o Add another ef slot to hold a copy-state function. boot-2009-10-1-cross.lisp: o Silently change stream::+ef-max+ here. o Note that this is for the unicode-string-buffer-branch.
First set of changes to add new slots to lisp-stream so we can implement a faster external formats by converting all buffered input at one step instead of a character at a time. code/struct.lisp: o Add new slots: string-buffer, string-index, string-buffer-len code/sysmacs.lisp: o Update PREPARE-FOR-FAST-READ-CHAR, DONE-WITH-FAST-READ-CHAR, and FAST-READ-CHAR to use the new slots. code/fd-stream.lisp: o Don't allocate the in-buffer array since the fast read char stuff no longer handles the in-buffer. bootfiles/20a/boot-2009-10-1-cross.lisp: o New file. Use this to cross-compile this change.
file boot-2009-10-1-cross.lisp was initially added on branch unicode-string-buffer-branch.
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