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* Add forced write of '\0' to destination to end strings correctly
* Add dbExtractArrayFromBuf() to make array copies from ref type field logs easier
* ...Show functions take an indent argument (number of spaces to print
in front of each line) instead of a char* intro to avoid allocation at each level,
replacing '\t' with 8 spaces in top level code where necessary
* Refactor element_size -> field_size (as used in dbAddr), also in dbChannel
functions
* Fix: wrong macro name in unused part of db_field_log.h
* Add tests for callback registration (pre and post)
* Add tests for callback execution (pre and post)
* Add tests for report function and array destructor
* Add test for combinations of two plugins (that register pre eventq, post eventq or in
both chains), checking the order of calls and db_field_log changes independently
* Make test messages more verbose and comprehensive
* Add new db_field_log type "probe" for type change detection
* Move linked lists for pre- and post-event-queue chains into dbChannel,
function pointers and arguments into chFilter
* Remove set-type-chain completely
* Simplify register functions in filter and plugin interfaces
* Add functions to run the pre and post chains to dbChannel
* Refactor in db_field_log: field_size -> element_size
* Refactor in dbEvent:
db_post_single_event_first -> db_create_event_log
db_post_single_event_final -> db_queue_event_log (removed from public interface)
* Change tests to compile
* Add field_size to db_field_log
* Add final type, dbr_type, no_elements, and field size to dbChannel
(plus matching access methods)
* Add set-type callback chain to find out final sizes and types
* Add registration calls for pre-event-queue and post-event-queue insertion
* db_field_log now is one of rec = use record, val = val inside, ref = reference inside
* add field_type and no_elements (to allow plugins change type and array size)
* add destructor in the ref type (called when deleting the db_field_log)
* change dbEvent.c and dbAccess.c to use the new field log features
* Redefine db_field_log to be a union between a "value" type (as before)
and a "reference" type (pointers to values, dtor for plugin array copies).
* Add db_delete_field_log function that correctly destructs a db_field_log.
* Move evSubscrip from dbEvent.[ch] (private) to dbChannel.h (public).
* Split up db_post_single_event_private into two parts:
..._first creates a new db_field_log chunk and copies from db.
..._final puts a db_field_log into the event queue.
* Add a typedef for the pre-event-queue recursive callbacks.
* Add a register function for the callback (plus void* arg) to filter and
plugin interfaces.
* Add the code that builds up the pre-event-queue callback chain.
* Changes to the test files to compile (no tests added yet).
* Fix missing include in db_field_log.h.
- chfPlugin.h contains the simple jump table and doxygen documentation
- chfPlugin.c is a wrapper library around the yajl callbacks that parses
any client-supplied configuration into the user's structure
- test/chfPluginTest.c tests the library and the data conversion
- Made chFilterPlugin public (moved from dbChannel.c to dbChannel.h)
- Made the interface jump table chFilterIf part of the chFilterPlugin
(i.e. once per plugin) instead of chFilter (once per instance)
- Added a pointer from chFilter (instance) to chFilterPlugin (plugin)
- Added a private user pointer in chFilterPlugin
- Changed dbFindFilter() to return a chFilterPlugin* (instead of the jump table)
- Changed dbRegisterFilter() to accept a user private pointer as 3rd arg
* Moved routines into dbLink.h and dbLink.c
* Created separate routines for DB_LINK processing
* Added dbinitLink() and dbAddLink()
* Started a Link Support Entry Table, not used yet
* Everything should still work as before...
* Added dbChannelGet()
* Implement dbChannelGetField() using dbChannelGet()
* Close filters in reverse order of opening
* Messages and comments improved.
* dbGet() now handles DBF_*LINK fields,
* Simplify dbGetField(),
* Split out getAttrValue(),
* Rename dbGetFieldLink() to getLinkValue(),
* Reduce number of casts.
