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100 lines
3.0 KiB
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100 lines
3.0 KiB
Plaintext
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Harbour switch handling spec
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============================
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This spec goes for CLIPPERCMD, HARBOURCMD, Harbour
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compiler and #pragma directives in the source code.
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The command line always overrides the envvar.
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Note that some switches are not accepted in envvar,
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some others in #pragmas.
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First the parser should start to step through
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all the tokens in the string separated by
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whitespace. (or just walk through all argv[])
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1.) If the token begins with "-", it
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should be treated as a new style switch.
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One or more switch characters can follow
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this. The "-" sign inside the token
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will turn off the switch.
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If the switch has an argument all the following
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characters are treated as part of the argument.
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The "/" sign has no special meaning here.
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Switch Resulting options
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-wn ( W N )
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-w-n ( !W N )
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-wi/harbour/include/ ( W I=/harbour/include/ )
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-wi/harbour/include/n ( W I=/harbour/include/n )
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-wes0n ( W ES=0 N )
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-wen ( W [invalid switch: e] N )
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-wesn ( W ES=Default(0) N )
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-wses ( W S ES=Default(0) )
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-wess ( W ES=Default(0) S )
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- ( [invalid switch] )
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-w-n-p ( !W !N P )
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-w-n-p- ( !W !N !P )
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-w- -w -w- ( finally: !W )
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2.) If the token begins with "/", it
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should be treated as a compatibility style switch.
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The parser scans the token for the next "/" sign or EOS
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and treats the resulting string as one switch.
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This means that a switch with an argument containing
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"/" sign has some limitations. This may be solved by
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allowing the usage of quote characters. This is mostly
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a problem on systems which use "/" as path separator.
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The "-" sign has no special meaning here, it can't be
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used to disable a switch.
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Switch Resulting options
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/w/n ( W N )
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/wo/n ( [invalid switch: wo] N )
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/ihello/world/ ( I=hello [invalid switch: world] [invalid switch: /] )
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/i"hello/world/"/w ( I=hello/world/ W )
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/ihello\world\ ( I=hello\world\ )
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3.) If the token begins with anything else it should
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be skipped.
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The Harbour switches are always case insensitive.
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In the Harbour commandline the two style can be used together:
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harbour -wnes2 /gc0/q0 -iC:\hello
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Exceptions:
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- Handling of the /CREDIT undocumented switch
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on Harbour command line is unusual, check the current code
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for this.
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- The CLIPPER, HARBOUR and Harbour application
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command line parsing is a different beast,
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see cmdarg.c for a NOTE.
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Just some examples for the various accepted forms:
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//F20 == /F20 == F20 == F:20 == F20X
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//TMPPATH:C:\hello
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F20//TMPPATH:/temp///F:30000000 NOIDLE
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F0NOIDLEX10
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SQUAWKNOIDLE
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"//" should always be used on the command line.
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[ Copyright (c) 1999-2009 Viktor Szakats (harbour syenar.net)
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Licensed under Creative Commons Attribution-ShareAlike 3.0:
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http://creativecommons.org/licenses/by-sa/3.0/
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See COPYING.txt. ]
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