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authormonty@donna.mysql.com <>2001-01-16 15:02:25 +0200
committermonty@donna.mysql.com <>2001-01-16 15:02:25 +0200
commit3ca140edb319385819f8cbf5caf904f54c359172 (patch)
treef2d56706f932b8495846a884f7a9aa8bbbab0e3f /strings
parent513490e70cb9d01e558aa00819bbc278676685de (diff)
downloadmariadb-git-3ca140edb319385819f8cbf5caf904f54c359172.tar.gz
Fixed bug in CHECK TABLE ... EXTENDED
Added keyword MEDIUM to CHECK TABLE New benchmarks results for Linux-alpha
Diffstat (limited to 'strings')
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-File : READ-ME
-Author : Richard A. O'Keefe.
-Updated: 30 April 1984
-Purpose: Explain the new strings package.
-
- The UNIX string libraries (described in the string(3) manual page)
-differ from UNIX to UNIX (e.g. strtok is not in V7 or 4.1bsd). Worse,
-the sources are not in the public domain, so that if there is a string
-routine which is nearly what you want but not quite you can't take a
-copy and modify it. And of course C programmers on non-UNIX systems
-are at the mercy of their supplier.
-
- This package was designed to let me do reasonable things with C's
-strings whatever UNIX (V7, PaNiX, UX63, 4.1bsd) I happen to be using.
-Everything in the System III manual is here and does just what the S3
-manual says it does. There are also lots of new goodies. I'm sorry
-about the names, but the routines do have to work on asphyxiated-at-
-birth systems which truncate identifiers. The convention is that a
-routine is called
- str [n] [c] <operation>
-If there is an "n", it means that the function takes an (int) "length"
-argument, which bounds the number of characters to be moved or looked
-at. If the function has a "set" argument, a "c" in the name indicates
-that the complement of the set is used. Functions or variables whose
-names start with _ are support routines which aren't really meant for
-general use. I don't know what the "p" is doing in "strpbrk", but it
-is there in the S3 manual so it's here too. "istrtok" does not follow
-this rule, but with 7 letters what can you do?
-
- I have included new versions of atoi(3) and atol(3) as well. They
-use a new primitive str2int, which takes a pair of bounds and a radix,
-and does much more thorough checking than the normal atoi and atol do.
-The result returned by atoi & atol is valid if and only if errno == 0.
-There is also an output conversion routine int2str, with itoa and ltoa
-as interface macros. Only after writing int2str did I notice that the
-str2int routine has no provision for unsigned numbers. On reflection,
-I don't greatly care. I'm afraid that int2str may depend on your "C"
-compiler in unexpected ways. Do check the code with -S.
-
- Several of these routines have "asm" inclusions conditional on the
-VaxAsm option. These insertions can make the routines which have them
-quite a bit faster, but there is a snag. The VAX architects, for some
-reason best known to themselves and their therapists, decided that all
-"strings" were shorter than 2^16 bytes. Even when the length operands
-are in 32-bit registers, only 16 bits count. So the "asm" versions do
-not work for long strings. If you can guarantee that all your strings
-will be short, define VaxAsm in the makefile, but in general, and when
-using other machines, do not define it.
-
- To use this library, you need the "strings.a" library file and the
-"strings.h" and "ctypes.h" header files. The other header files are
-for compiling the library itself, though if you are hacking extensions
-you may find them useful. General users really shouldn't see them.
-I've defined a few macros I find useful in "strings.h"; if you have no
-need for "index", "rindex", "streql", and "beql", just edit them out.
-On the 4.1bsd system I am using declaring all these functions 'extern'
-does not mean that they will all be loaded; but only the ones you use.
-When using lesser systems you may find it necessary to break strings.h
-up, or you could get by with just adding "extern" declarations for the
-functions you want as you need them. Many of these functions have the
-same names as functions in the "standard C library", by design as this
-is a replacement/reimplementation of part of that library. So you may
-have to talk the loader into loading this library first. Again, I've
-found no problems on 4.1bsd.
-
- You may wonder at my failure to provide manual pages for this code.
-For the things in V7, 4.?, or SIII, you should be able to use whichever
-manual page came with that system, and anything I might write would be
-so like it as to raise suspicions of violating AT&T copyrights. In the
-sources you will find comments which provide far more documentation for
-these routines than AT&T ever provided for their strings stuff, I just
-don't happen to have put it in nroff -man form. Had I done so, the .3
-files would have outbulked the .c files!
-
- These files are in the public domain. This includes getopt.c, which
-is the work of Henry Spencer, University of Toronto Zoology, who says of
-it "None of this software is derived from Bell software. I had no access
-to the source for Bell's versions at the time I wrote it. This software
-is hereby explicitly placed in the public domain. It may be used for
-any purpose on any machine by anyone." I would greatly prefer it if *my*
-material received no military use.
-