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283 lines
9.1 KiB
Plaintext
283 lines
9.1 KiB
Plaintext
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dnl-----------------------------------------------------------------------
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dnl
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dnl Karls M4 macros for the signal system used by gtk--
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dnl
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dnl Copyright (C) 1998 Karl Nelson <kenelson@ece.ucdavis.edu>
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dnl Tero Pulkkinen
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dnl
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dnl Currently maintained by Tero Pulkkinen. <terop@modeemi.cs.tut.fi>
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dnl
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dnl This library is free software; you can redistribute it and/or
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dnl modify it under the terms of the GNU Library General Public
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dnl License as published by the Free Software Foundation; either
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dnl version 2 of the License, or (at your option) any later version.
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dnl
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dnl This library is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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dnl Library General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU Library General Public
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dnl License along with this library; if not, write to the Free
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dnl Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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dnl
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dnl-----------------------------------------------------------------------
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dnl Recursion prevention. (Don't attempt to understand why this works!)
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changequote(, )dnl
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changequote([, ])dnl
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pushdef([DIVERSION],divnum)dnl
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divert(-1)dnl
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ifdef([__template_macros__],[],[
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define(__template_macros__)
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dnl-----------------------------------------------------------------------
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dnl
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dnl M4 macros for general sanity
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dnl
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dnl M4 Quotas are hard to work with, so use braces like autoconf
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dnl (which are matched by vi, emacs)
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changequote(, )
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changequote([, ])
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dnl
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dnl M4 comments conflict with compiler directives
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changecom(, )
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dnl BRACE(text) => [text]
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dnl When we want something to appear with braces
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define([BRACE],[[[$*]]])
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dnl
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dnl PROT(macro)
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dnl If a macro generates an output with commas we need to protect it
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dnl from being broken down and interpreted
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define([PROT],[[$*]])
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dnl
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dnl LOWER(string)
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dnl lowercase a string
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define([LOWER],[translit([$*],[ABCDEFGHIJKLMNOPQRSTUVWXYZ],[abcdefghijklmnopqrstuvwxyz])])
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dnl
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dnl UPPER(string)
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dnl uppercase a string
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define([UPPER],[translit([$*],[abcdefghijklmnopqrstuvwxyz],[ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
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define([UPPER_SAFE],[translit([$*],[abcdefghijklmnopqrstuvwxyz.-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ__])])
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dnl
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dnl BASENAME(string)
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dnl extract the basename of a string
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define([BASENAME],[patsubst([$*],[^.*/],[])])
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dnl
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dnl M4NAME(string)
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dnl extract the basename of a string
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define([M4NAME],[patsubst(BASENAME([$*]),[\.m4$],[])])
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dnl NUM(arg,arg,...)
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dnl M4 defines $# very badly (empty list=1). So we need a better one
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define([NUM],[ifelse(len([$*]),0,0,[$#])])
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dnl
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dnl IF(cond,string1,string2)
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dnl places string1 if length (without spaces) of cond is zero,
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dnl else string2
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define([IF],[ifelse(len(PROT(translit([$1],[ ]))),0,[$3],[$2])])
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dnl define([IF],[ifelse(len(PROT(patsubst([$1],[ ]))),0,[$3],[$2])])
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dnl
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dnl minclude(filename)
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dnl This includes only the macros from a file but throws away the output.
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dnl Used to take the macros from a file without getting it extra output.
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define([minclude],[IF([$1],[dnl
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pushdef([CURRENT_DIVERSION],divnum)dnl
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divert(-1)
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include($1)
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divert(CURRENT_DIVERSION)dnl
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popdef([CURRENT_DIVERSION])dnl],[[minclude]])])
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dnl
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dnl makes the current filename into a string approprate for use as
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dnl C identified define. (Defaults to this library name)
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dnl
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dnl example: (filename test.hh.m4)
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dnl __header__ => SIGCXX_TEST_H
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dnl __header__(MYHEAD) => MYHEAD_TEST_H
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dnl define([__header__],[ifelse($1,,[SIGCXX],UPPER($1))[_]UPPER(patsubst(translit(BASENAME(__file__),[.-],[__]),[_m4],[]))])
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define([__header__],[ifelse($1,,[SIGCXX],UPPER($1))[_]UPPER_SAFE(M4NAME(__file__))])
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dnl
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dnl Set of M4 macros for variable argument template building
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dnl
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dnl ARGS(name,number)
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dnl Builds a comma seperated protected list of numbered names
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dnl Use this as short hand to specify arguement names
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dnl
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dnl ARGS(arg,3) => ARG1,ARG2,ARG3
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define([_ARGS],[ifelse(eval($2<$3),0,[$1$2],[$1$2,_ARGS($1,eval($2+1),$3)])])
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define([ARGS],[ifelse(eval($2>0),1,[PROT(_ARGS(UPPER([$1]),1,$2))],[PROT])])
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dnl
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dnl LIST/C_LIST(string1,cond1,string2,cond2,...)
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dnl These are intended for making extended argument lists
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dnl parameters are in pairs, the first is output if the
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dnl 2nd is nonzero length, the process is then repeated
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dnl with the next set of arguments.
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dnl
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dnl Macro expansions that expand to result in commas must call
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dnl PROT to prevent permature expansion. ARG* macros do
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dnl this automatically. (If unsure, add braces until it stops
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dnl interpreting inter macros, remove one set of braces, if
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dnl still not right use PROT)
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dnl
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dnl C_LIST adds a comma in front
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dnl (LIST is probably the most useful macro in the set.)
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define([LIST],[ifelse($#,1,,len([$2]),0,[LIST(shift(shift($@)))],len([$1]),0,[LIST(shift(shift($@)))],[[$1]C_LIST(shift(shift($@)))])])
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dnl
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define([C_LIST],[ifelse($#,1,,len([$2]),0,[C_LIST(shift(shift($@)))],len([$1]),0,[C_LIST(shift(shift($@)))],[,[$1]C_LIST(shift(shift($@)))])])
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dnl
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dnl ARG_LOOP(macro_name,seperator,argument_list)
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dnl Very powerful macro for construction of list of variables
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dnl formated in specify ways. To use define a macro taking
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dnl one variable which is called the format. The second argument
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dnl is a seperator which will appear between each argument.
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dnl The rest is then interpreted as arguments to form the list.
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dnl
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dnl Example:
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dnl define([FOO],[foo([$1])])
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dnl ARG_LOOP([FOO],[[, ]],A,B,C)
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dnl
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dnl Gives: foo(A), foo(B), foo(C)
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dnl
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define([_ARG_LOOP],[dnl
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ifelse(NUM($*),0,,NUM($*),1,[dnl
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indir(LOOP_FORMAT,[$1])],[dnl
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indir(LOOP_FORMAT,[$1])[]LOOP_SEPERATOR[]_ARG_LOOP(shift($*))])])
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define([ARG_LOOP],[dnl
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pushdef([LOOP_FORMAT],[[$1]])dnl
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pushdef([LOOP_SEPERATOR],[$2])dnl
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_ARG_LOOP(shift(shift($*)))[]dnl
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popdef([LOOP_FORMAT])dnl
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popdef([LOOP_SEPERATOR])dnl
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])
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dnl
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dnl Define some useful formats for use with ARG_LOOP.
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define([FORMAT_ARG_CLASS],[class [$1]])
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define([FORMAT_ARG_BOTH],[[$1] LOWER([$1])])
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define([FORMAT_ARG_REF],[typename Trait<[$1]>::ref LOWER([$1])])
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define([FORMAT_ARG_TYPE],[[$1]])
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define([FORMAT_ARG_NAME],[LOWER($1)])
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define([FORMAT_ARG_CBNAME],[LOWER($1)_])
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define([FORMAT_ARG_CBDECL],[[$1] LOWER([$1])_;])
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define([FORMAT_ARG_CBINIT],[LOWER([$1])_(LOWER([$1]))])
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dnl
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dnl The following functions generate various types of parameter lists
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dnl For parameter lists
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dnl ARG_CLASS([P1,P2]) -> class P1,class P2
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dnl ARG_BOTH([P1,P2]) -> P1 p1,P2 p2
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dnl ARG_TYPE([P1,P2]) -> P1,P2
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dnl ARG_NAME([P1,P2]) -> p1,p2
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dnl For callback lists
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dnl ARG_CBNAME([C1,C2]) -> c1_,c2_
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dnl ARG_CBINIT([C1,C2]) -> c1_(c1),c2_(c2)
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dnl ARG_CBDECL([C1,C2]) -> C1 c1_; C2 c2_;
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dnl
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define([ARG_CLASS],[PROT(ARG_LOOP([FORMAT_ARG_CLASS],[[,]],$*))])
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define([ARG_BOTH],[PROT(ARG_LOOP([FORMAT_ARG_BOTH],[[,]],$*))])
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define([ARG_REF],[PROT(ARG_LOOP([FORMAT_ARG_REF],[[,]],$*))])
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define([ARG_TYPE],[PROT([$*])])
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define([ARG_NAME],[PROT(LOWER($*))])
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define([ARG_CBNAME],[PROT(ARG_LOOP([FORMAT_ARG_CBNAME],[[,]],$*))])
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define([ARG_CBDECL],[PROT(ARG_LOOP([FORMAT_ARG_CBDECL],[ ],$*))])
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define([ARG_CBINIT],[PROT(ARG_LOOP([FORMAT_ARG_CBINIT],[[,]],$*))])
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dnl
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dnl C_* - the same with a comma in front
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dnl (we should obsolete these, LIST is better)
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define([C_ARG_CLASS], [ifelse(NUM($*),0,,[,ARG_CLASS($*)])])
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define([C_ARG_BOTH],[ifelse(NUM($*),0,,[,ARG_BOTH($*)])])
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define([C_ARG_TYPE],[ifelse(NUM($*),0,,[,ARG_TYPE($*)])])
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define([C_ARG_NAME],[ifelse(NUM($*),0,,[,ARG_NAME($*)])])
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define([C_ARG_CBNAME],[ifelse(NUM($*),0,,[,ARG_CNAME($*)])])
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define([C_ARG_CBINIT],[ifelse(NUM($*),0,,[,ARG_INIT($*)])])
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dnl
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dnl T_DROP(string)
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dnl Removes unnecessary <> with empty templates
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dnl (occasionally useful)
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define([T_DROP],[ifelse([$1],<>,,[$*])])
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dnl
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dnl DROP(string,drop)
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dnl Removes unnecessary strings if they match drop
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dnl (occasionally useful)
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define([DROP],[ifelse([$1],[$2],,[$*])])
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dnl
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dnl LINE(linenum)
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dnl places a #line statement if __debug__ set
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dnl Use this at top of macro template and following
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dnl macros that contain newlines.
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dnl
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dnl example:
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dnl LINE(]__line__[)dnl
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define([LINE],[ifdef([__debug__],[#line $1 "]__file__["
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])])
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dnl-----------------------------------------------------------------------
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dnl Libsigc++ macros to simpilify typing of internal macros
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define([TYPEDEF_RTYPE],[
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ifelse($1,void,[dnl
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typedef void $2;dnl
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],[dnl
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#ifdef SIGC_CXX_PARTIAL_SPEC
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typedef $1 $2;
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#else
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typedef typename Trait<$1>::type $2;
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#endif])])
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define([__SLOT__],[dnl
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ifelse([$2$3],,[Slot0<$1>],
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[$3],,[Slot[]NUM($2)<$1,$2>],
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[$2],,[Slot[]NUM($3)<$1,$3>],
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[Slot[]eval(NUM($2)+NUM($3))<$1,$2,$3>])])
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define([QT_FIREWALL],[dnl
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// Qt steals a method name.
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#ifdef SIGC_QT
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#undef emit
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#endif
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#ifdef emit
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#define SIGC_QT
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#undef emit
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#endif
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])
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define([END_QT_FIREWALL],[dnl
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#ifdef SIGC_QT
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#define emit
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#endif
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])
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dnl-----------------------------------------------------------------------
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dnl End of recursion protection. Do not put anything below this line.
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])
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divert(DIVERSION)dnl
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popdef([DIVERSION])dnl
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