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- ----------------------------------------------------------------------
- | Citadel |
- | 241 East Eleventh Street * Brookville, IN 47012 * 317-647-4720 |
- | BBS 317-647-2403 |
- ----------------------------------------------------------------------
-
- cbase is distributed in a single compressed file cbaseRL.zip; R and L
- would be the release and level numbers, respectively. The ZIP data
- compression utilities are needed to extract the individual files.
-
- The following files are obtained by decompressing cbaseRL.zip:
-
- cbase.rme preliminary information
- rlsnotes.txt release notes
- order.txt order form
- distrib.txt application to distribute cbase for profit
- guide.txt cbase Programmer's Guide
- blkioRL.zip blkio library source code
- lseqRL.zip doubly linked sequential file mngmnt library source code
- btreeRL.zip B+-tree file management library source code
- cbase.zip cbase library source code
- rolodeck.zip rolodeck example program
-
- cbase is not public domain. It may be evaluated free for a period of
- 30 days. See the file order.txt for registration and ordering
- information.
-
- cbase includes four individual libraries, each of which has been
- separated into its own compressed file. The first step in the
- installation is to place each compressed file in its own directory,
- then perform the extraction to obtain the individual files. For
- example, the following sequence of MS-DOS commands would create
- a directory for the blkio library and extract the blkio files into
- that directory.
-
- > mkdir blkio
- > copy blkioRL.zip blkio
- > chdir blkio
- > pkunzip blkioRL.zip
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- The same must be done for manxRL.zip, which is one of the files
- extracted from blkioRL.zip; manx is a utility used to generate
- the reference manual for each library. The remaining installation
- instructions may be found in Appendix A of the "cbase Programmer's
- Guide" (guide.txt). After installing each library, the reference
- manual for that library will be in the file libname.man, where libname
- would be the name of the library.
-
- The original file cbaseRL.zip should be saved if you wish to pass on
- copies of cbase to others. cbase may not be distributed as individual
-
- Citadel 90/06/21
- files, or in an incomplete or altered form. The individual libraries
- may not be distributed separately. The exceptions are blkioRL.zip and
- manxRL.zip; see their respective readme files for details. An
- application must be filed and approved in order to distribute copies
- of cbase for profit. See the file distrib.txt for an application
- form.
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- Citadel 90/06/21
- ----------------------------------------------------------------------
- | cbase - The C Database Library |
- | Version 1.0 |
- ----------------------------------------------------------------------
-
- cbase is a complete multiuser C database file management library,
- providing indexed and sequential access on multiple keys. It features
- a modular design, comprising four individual libraries:
-
- cbase - C database library
- lseq - doubly linked sequential file management library
- btree - B+-tree file management library
- blkio - block buffered input/output library
-
- cbase internally uses lseq for record storage and btree for inverted
- file index storage, which in turn use blkio for file access and
- buffering; blkio is analagous to stdio but based on a file model more
- appropriate for structured files such as used in database software.
- The figure below diagrams the hierarchical relationship of the cbase
- libraries.
-
- -----------------------------------
- | cbase |
- -----------------------------------
- | |
- ----------------- -----------------
- | lseq | | btree |
- ----------------- -----------------
- | |
- -----------------------------------
- | blkio |
- -----------------------------------
-
- cbase Libraries
-
-
- The lower level libraries can also be accessed directly for
- independent use. For example, the btree library can be used to
- manipulate B+-trees for purposes other than inverted files, and the
- blkio library to develop new structured file management libraries.
-
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- Citadel 90/06/21
-
- cbase Features
- --------------
- Portable:
- - Written in strict adherence to ANSI C standard.
- - K&R C compatibility maintained.
- - All operating system dependent code is isolated to a small portion
- of the blkio library to make porting to new systems easy.
- - UNIX and MS-DOS currently supported.*
- Buffered:
- - Both records and indexes are buffered using LRU (least recently
- used) buffering.
- Fast and efficient random access:
- - B+-trees are used for inverted file key storage.
- - Multiple keys are supported.
- - Both unique and duplicate keys are supported.
- Fast and efficient sequential access:
- - B+-trees also allow keyed sequential access.
- - Records are stored in doubly linked lists for non-keyed sequential
- access.
- - Both types of sequential access are bidirectional.
- Multiuser:
- - Read-only locking.
- Other:
- - Text file data import and export.
- - Custom data types can be defined.
- - Marker used to detect corrupt files when opened.
- - Reference documentation is in standard UNIX manual entry format,
- including errno values.
-
-
- $77 plus shipping VISA/MasterCard
-
- All source code included.
- Technical support included.
- No run-time fees or royalties.
-
- Citadel
- 241 East Eleventh Street
- Brookville, IN 47012
- 317-647-4720
- BBS 317-647-2403
-
- An evaluation copy of cbase can be obtained at no charge on the
- Citadel BBS 317-647-2403, or send $5 for diskette.
-
-
-
- * UNIX is a trademark of AT&T. Turbo C is a trademark of Borland
- International, Inc. MS-DOS is a trademark of Microsoft.
-
- Citadel 90/06/21