Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
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divert(-1) -*- Autoconf -*-
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# This file is part of Autoconf.
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# Base m4 layer.
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# Requires GNU m4.
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# Copyright (C) 1999 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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#
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# As a special exception, the Free Software Foundation gives unlimited
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# permission to copy, distribute and modify the configure scripts that
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# are the output of Autoconf. You need not follow the terms of the GNU
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# General Public License when using or distributing such scripts, even
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# though portions of the text of Autoconf appear in them. The GNU
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# General Public License (GPL) does govern all other use of the material
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# that constitutes the Autoconf program.
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#
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# Certain portions of the Autoconf source text are designed to be copied
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# (in certain cases, depending on the input) into the output of
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# Autoconf. We call these the "data" portions. The rest of the Autoconf
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# source text consists of comments plus executable code that decides which
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# of the data portions to output in any given case. We call these
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# comments and executable code the "non-data" portions. Autoconf never
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# copies any of the non-data portions into its output.
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#
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# This special exception to the GPL applies to versions of Autoconf
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# released by the Free Software Foundation. When you make and
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# distribute a modified version of Autoconf, you may extend this special
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# exception to the GPL to apply to your modified version as well, *unless*
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# your modified version has the potential to copy into its output some
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# of the text that was the non-data portion of the version that you started
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# with. (In other words, unless your change moves or copies text from
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# the non-data portions to the data portions.) If your modification has
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# such potential, you must delete any notice of this special exception
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# to the GPL from your modified version.
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#
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# Written by Akim Demaille.
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#
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changequote([, ])
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# Some old m4's don't support m4exit. But they provide
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# equivalent functionality by core dumping because of the
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# long macros we define.
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ifdef([__gnu__], ,
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[errprint(Autoconf requires GNU m4. Install it before installing Autoconf or
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set the M4 environment variable to its path name.)
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m4exit(2)])
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2000-02-08 19:20:57 +08:00
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Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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## --------------------------------- ##
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## Defining macros and name spaces. ##
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## --------------------------------- ##
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2000-02-08 19:20:57 +08:00
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# Name spaces.
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# Sometimes we want to disable some *set* of macros, and restore them
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# later. We provide support for this via name spaces.
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# There are basically three characters playing this scene: defining a
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# macro in a namespace, disabling a namespace, and restoring a namespace
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# (i.e., all the definitions it holds).
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# Technically, to define a MACRO in NAMESPACE means to define the
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2000-02-08 20:43:47 +08:00
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# macro named `NAMESPACE::MACRO' to the VALUE. At the same time, we
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# append `undefine(NAME)' in the macro named `m4_disable(NAMESPACE)',
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# and similarly a binding of NAME to the value of `NAMESPACE::MACRO'
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# in `m4_enable(NAMESPACE)'. These mechanisms allow to bind the
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# macro of NAMESPACE and to unbind them at will.
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2000-02-08 19:20:57 +08:00
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# Of course this implementation is not really efficient: m4 has to
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# grow strings which can become quickly huge, which slows it
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# significantly. A better implementation should be a list of the
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# symbols associated to the name space, and m4_enable?m4_disable
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# would just loop over this list. Unfortunately loops of active
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# symbols are extremely delicate in m4, and I'm still unsure of the
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# implementation I want. So, until we reach a perfect agreement on
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# foreach loops implementation, I prefer to use the brute force.
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# It should be noted that one should avoid as much as possible to use
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# `define' for temporaries. Now that `define' as quite a complex
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# meaning, it is an expensive operations that should be limited to
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# macros. Use `m4_define' for temporaries.
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Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# Private copies of the macros we used in entering / exiting the
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# libm4 name space. It is much more convenient than fighting with
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# the renamed version of define etc.
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define([m4_changequote], defn([changequote]))
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define([m4_define], defn([define]))
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define([m4_defn], defn([defn]))
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define([m4_dnl], defn([dnl]))
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define([m4_indir], defn([indir]))
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2000-02-08 21:43:58 +08:00
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define([m4_popdef], defn([popdef]))
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define([m4_pushdef], defn([pushdef]))
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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define([m4_undefine], defn([undefine]))
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2000-02-08 21:43:58 +08:00
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m4_define([m4_namespace_push], [m4_pushdef([m4_namespace], [$1])])
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m4_define([m4_namespace_pop], [m4_popdef([m4_namespace])])
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m4_namespace_push([libm4])
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|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# m4_namespace_register(NAMESPACE, NAME)
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# --------------------------------------
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#
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# Register NAME in NAMESPACE, i.e., append the binding/unbinding in
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# `m4_disable(NAMESPACE)'/`m4_enable(NAMESPACE)'.
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m4_define([m4_namespace_register],
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[m4_define([m4_disable($1)],
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m4_defn([m4_disable($1)])[m4_undefine([$2])])dnl
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m4_define([m4_enable($1)],
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m4_defn([m4_enable($1)])[m4_define([$2], m4_defn([$1::$2]))])dnl
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])
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2000-02-08 19:20:57 +08:00
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# m4_namespace_define(NAMESPACE, NAME, VALUE)
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# -------------------------------------------
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#
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# Assign VALUE to NAME in NAMESPACE, and register it.
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2000-02-08 19:20:57 +08:00
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m4_define([m4_namespace_define],
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2000-02-08 20:43:47 +08:00
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[m4_define([$1::$2], [$3])dnl
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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m4_namespace_register([$1], [$2])dnl
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2000-02-08 19:20:57 +08:00
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])
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# define(NAME, VALUE)
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# -------------------
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#
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# Assign VALUE to NAME in the current name space, and bind it at top level.
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m4_define([define],
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[m4_namespace_define(m4_namespace, [$1], [$2])dnl
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m4_define([$1], [$2])dnl
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])
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|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# Register define too.
|
2000-02-09 00:51:19 +08:00
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m4_namespace_define(libm4, [define], defn([define]))
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# Put the m4 builtins into the `libm4' name space. We cannot use `define'
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# here because of the very special handling of `defn' for builtins.
|
2000-02-08 21:43:58 +08:00
|
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|
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
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# The following macro is useless but here, so undefine once done.
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m4_define(m4_namespace_builtin,
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[m4_define([libm4::$1], defn([$1]))
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m4_namespace_register(libm4, [$1])])
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m4_namespace_builtin([builtin])
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m4_namespace_builtin([changequote])
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m4_namespace_builtin([defn])
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m4_namespace_builtin([dnl])
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m4_namespace_builtin([esyscmd])
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m4_namespace_builtin([ifdef])
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m4_namespace_builtin([ifelse])
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m4_namespace_builtin([indir])
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m4_namespace_builtin([patsubst])
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m4_namespace_builtin([popdef])
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m4_namespace_builtin([pushdef])
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m4_namespace_builtin([regexp])
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|
m4_namespace_builtin([undefine])
|
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|
m4_namespace_builtin([syscmd])
|
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|
m4_namespace_builtin([sysval])
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m4_undefine([m4_namespace_builtin])
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|
2000-02-08 19:20:57 +08:00
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# m4_disable(NAMESPACE)
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|
# ---------------------
|
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|
|
#
|
|
|
|
# Undefine all the macros of NAMESPACE.
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
|
|
|
m4_define([m4_disable], [m4_indir([m4_disable($1)])])
|
2000-02-08 19:20:57 +08:00
|
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|
|
|
|
|
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|
|
# m4_enable(NAMESPACE)
|
|
|
|
# --------------------
|
|
|
|
#
|
|
|
|
# Restore all the macros of NAMESPACE.
|
Improve support of name spaces in libm4. Put the m4 builtins
in the `libm4' name space.
* libm4 (m4_changequote, m4_define, m4_defn, m4_dnl, m4_indir,
m4_undefine): Private copies in the global name space. Used by
the name space mechanisms.
(m4_namespace_register): New macro.
(m4_namespace_define): Use it.
(builtin, changequote, defn, dnl, esyscmd, ifdef, ifelse, indir,
patsubst, popdef, pushdef, regexp, undefine, syscmd, sysval): Put
in the `libm4' name space.
(m4_disable, m4_enable): Use the private m4_indir, otherwise once
`libm4' closed, there is no `indir' available, and therefore no
means to reopen a name space.
2000-02-08 21:11:21 +08:00
|
|
|
m4_define([m4_enable], [m4_indir([m4_enable($1)])])
|
2000-02-08 19:20:57 +08:00
|
|
|
|
|
|
|
|
|
|
|
# m4_rename(SRC, DST)
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|
|
# -------------------
|
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|
#
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|
# Rename the macro SRC as DST.
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|
|
define([m4_rename],
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|
[m4_define([$2], m4_defn([$1]))m4_undefine([$1])])
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|
2000-02-08 21:43:58 +08:00
|
|
|
# Some m4 internals have names colliding with tokens we might use.
|
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|
|
# Rename them a` la `m4 --prefix-builtins'.
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|
|
m4_rename([eval], [m4_eval])
|
|
|
|
m4_rename([shift], [m4_shift])
|
|
|
|
m4_rename([format], [m4_format])
|
2000-02-08 19:20:57 +08:00
|
|
|
|
|
|
|
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
## --------------------------------------------- ##
|
|
|
|
## Move some m4 builtins to a safer name space. ##
|
|
|
|
## --------------------------------------------- ##
|
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|
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|
|
|
# m4_errprint(MSG)
|
|
|
|
# ----------------
|
|
|
|
# Same as `errprint', but reports the file and line.
|
|
|
|
define(m4_errprint, [errprint(__file__:__line__: [$1
|
|
|
|
])])
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|
|
# m4_warn(MSG)
|
|
|
|
# ------------
|
|
|
|
# Warn the user.
|
|
|
|
define(m4_warn, [m4_errprint([warning: $1])])
|
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|
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|
|
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|
|
|
# m4_fatal(MSG, [EXIT-STATUS])
|
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|
|
# ----------------------------
|
|
|
|
# Fatal the user. :)
|
|
|
|
define(m4_fatal,
|
|
|
|
[m4_errprint([error: $1])dnl
|
|
|
|
m4exit(ifelse([$2],, 1, [$2]))])
|
|
|
|
|
|
|
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|
|
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|
|
# We also want to neutralize include (and sinclude for symmetry),
|
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|
|
# but we want to extend them slightly: warn when a file is included
|
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|
# several times. This is in general a dangerous operation because
|
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|
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# quite nobody quotes the first argument of define.
|
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|
|
#
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|
# For instance in the following case:
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|
|
# define(foo, [bar])
|
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|
|
# then a second reading will turn into
|
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|
|
# define(bar, [bar])
|
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|
|
# which is certainly not what was meant.
|
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|
|
# m4_include_unique(FILE)
|
|
|
|
# -----------------------
|
|
|
|
# Declare that the FILE was loading; and warn if it has already
|
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|
|
# been included.
|
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|
|
define(m4_include_unique,
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|
|
[ifdef([m4_include($1)],
|
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|
|
[m4_warn([file `$1' included several times])])dnl
|
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|
|
define([m4_include($1)])])
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|
|
# m4_include(FILE)
|
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|
|
# ----------------
|
|
|
|
# As the builtin include, but warns against multiple inclusions.
|
|
|
|
define(m4_include,
|
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|
|
[m4_include_unique([$1])dnl
|
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|
|
builtin([include], [$1])])
|
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|
|
# m4_sinclude(FILE)
|
|
|
|
# -----------------
|
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|
|
# As the builtin sinclude, but warns against multiple inclusions.
|
|
|
|
define(m4_sinclude,
|
|
|
|
[m4_include_unique([$1])dnl
|
|
|
|
builtin([sinclude], [$1])])
|
|
|
|
|
|
|
|
# Neutralize include and sinclude.
|
|
|
|
undefine([include])
|
|
|
|
undefine([sinclude])
|
|
|
|
|
|
|
|
|
|
|
|
## --------------------------------------- ##
|
|
|
|
## Some additional m4 structural control. ##
|
|
|
|
## --------------------------------------- ##
|
|
|
|
|
|
|
|
# Both `ifval' and `ifset' tests against the empty string. The
|
|
|
|
# difference is that `ifset' is specialized on macros.
|
|
|
|
#
|
|
|
|
# In case of arguments of macros, eg $[1], it makes little difference.
|
|
|
|
# In the case of a macro `FOO', you don't want to check `ifval(FOO,
|
|
|
|
# TRUE)', because if `FOO' expands with commas, there is a shifting of
|
|
|
|
# the arguments. So you want to run `ifval([FOO])', but then you just
|
|
|
|
# compare the *string* `FOO' against `', which, of course fails.
|
|
|
|
#
|
|
|
|
# So you want a variation of `ifset' that expects a macro name as $[1].
|
|
|
|
# If this macro is both defined and defined to a non empty value, then
|
|
|
|
# it runs TRUE etc.
|
|
|
|
|
|
|
|
|
|
|
|
# ifval(COND, IF-TRUE[, IF-FALSE])
|
|
|
|
# --------------------------------
|
|
|
|
# If COND is not the empty string, expand IF-TRUE, otherwise IF-FALSE.
|
|
|
|
# Comparable to ifdef.
|
|
|
|
define([ifval], [ifelse([$1],[],[$3],[$2])])
|
|
|
|
|
|
|
|
|
|
|
|
# ifset(MACRO, IF-TRUE[, IF-FALSE])
|
|
|
|
# --------------------------------
|
|
|
|
# If MACRO has no definition, or of its definition is the empty string,
|
|
|
|
# expand IF-FALSE, otherwise IF-TRUE.
|
|
|
|
define([ifset],
|
|
|
|
[ifdef([$1],
|
|
|
|
[ifelse(defn([$1]), [], [$3], [$2])],
|
|
|
|
[$3])])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_default(EXP1, EXP2)
|
|
|
|
# ----------------------
|
|
|
|
# Returns EXP1 if non empty, otherwise EXP2.
|
|
|
|
define([m4_default], [ifval([$1], [$1], [$2])])
|
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|
|
|
|
|
|
|
|
|
|
# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
|
|
|
|
# -----------------------------------------------------------
|
|
|
|
# m4 equivalent of
|
|
|
|
# switch (SWITCH)
|
|
|
|
# {
|
|
|
|
# case VAL1:
|
|
|
|
# IF-VAL1;
|
|
|
|
# break;
|
|
|
|
# case VAL2:
|
|
|
|
# IF-VAL2;
|
|
|
|
# break;
|
|
|
|
# ...
|
|
|
|
# default:
|
|
|
|
# DEFAULT;
|
|
|
|
# break;
|
|
|
|
# }.
|
|
|
|
# All the values are optional, and the macro is robust to active
|
|
|
|
# symbols properly quoted.
|
|
|
|
define(m4_case,
|
|
|
|
[ifelse([$#], 0, [],
|
|
|
|
[$#], 1, [],
|
|
|
|
[$#], 2, [$2],
|
|
|
|
[$1], [$2], [$3],
|
|
|
|
[m4_case([$1], m4_shift(m4_shift(m4_shift($@))))])])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_match(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
|
|
|
|
# ----------------------------------------------------
|
|
|
|
# m4 equivalent of
|
|
|
|
#
|
|
|
|
# if (SWITCH =~ RE1)
|
|
|
|
# VAL1;
|
|
|
|
# elif (SWITCH =~ RE2)
|
|
|
|
# VAL2;
|
|
|
|
# elif ...
|
|
|
|
# ...
|
|
|
|
# else
|
|
|
|
# DEFAULT
|
|
|
|
#
|
|
|
|
# All the values are optional, and the macro is robust to active symbols
|
|
|
|
# properly quoted.
|
|
|
|
define(m4_match,
|
|
|
|
[ifelse([$#], 0, [],
|
|
|
|
[$#], 1, [],
|
|
|
|
[$#], 2, [$2],
|
|
|
|
regexp([$1], [$2]), -1, [m4_match([$1],
|
|
|
|
m4_shift(m4_shift(m4_shift($@))))],
|
|
|
|
[$3])])
|
|
|
|
|
|
|
|
|
|
|
|
## --------------------- ##
|
|
|
|
## Implementing m4 loops ##
|
|
|
|
## --------------------- ##
|
|
|
|
|
|
|
|
|
2000-02-08 16:41:52 +08:00
|
|
|
# m4_for(VARIABLE, FROM, TO, EXPRESSION)
|
|
|
|
# --------------------------------------
|
|
|
|
# Expand EXPRESSION defining VARIABLE to FROM, FROM + 1, ..., TO.
|
|
|
|
# Both limits are included.
|
|
|
|
define([m4_for],
|
|
|
|
[pushdef([$1], [$2])_m4_for([$1], [$2], [$3], [$4])popdef([$1])])
|
|
|
|
|
2000-02-08 19:20:57 +08:00
|
|
|
# Low level macros used to define m4_for.
|
|
|
|
# Use m4_define for temporaries.
|
2000-02-08 16:41:52 +08:00
|
|
|
define([_m4_for],
|
|
|
|
[$4[]ifelse($1, [$3], [],
|
2000-02-08 19:20:57 +08:00
|
|
|
[m4_define([$1], incr($1))_m4_for([$1], [$2], [$3], [$4])])])
|
2000-02-08 16:41:52 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# Implementing `foreach' loops in m4 is much more tricky than it may
|
|
|
|
# seem. Actually, the example of a `foreach' loop in the m4
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
# documentation is wrong: it does not quote the arguments properly,
|
|
|
|
# which leads to undesired expansions.
|
|
|
|
#
|
|
|
|
# The example in the documentation is:
|
|
|
|
#
|
|
|
|
# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
|
|
|
|
# | define(`foreach',
|
|
|
|
# | `pushdef(`$1', `')_foreach(`$1', `$2', `$3')popdef(`$1')')
|
|
|
|
# | define(`_arg1', `$1')
|
|
|
|
# | define(`_foreach',
|
|
|
|
# | `ifelse(`$2', `()', ,
|
|
|
|
# | `define(`$1', _arg1$2)$3`'_foreach(`$1', (shift$2), `$3')')')
|
|
|
|
#
|
|
|
|
# But then if you run
|
|
|
|
#
|
|
|
|
# | define(a, 1)
|
|
|
|
# | define(b, 2)
|
|
|
|
# | define(c, 3)
|
|
|
|
# | foreach(`f', `(`a', `(b', `c)')', `echo f
|
|
|
|
# | ')
|
|
|
|
#
|
|
|
|
# it gives
|
|
|
|
#
|
|
|
|
# => echo 1
|
|
|
|
# => echo (2,3)
|
|
|
|
#
|
|
|
|
# which is not what is expected.
|
|
|
|
#
|
|
|
|
# Once you understood this, you turn yourself into a quoting wizard,
|
|
|
|
# and come up with the following solution:
|
|
|
|
#
|
|
|
|
# | # foreach(x, (item_1, item_2, ..., item_n), stmt)
|
|
|
|
# | define(`foreach', `pushdef(`$1', `')_foreach($@)popdef(`$1')')
|
|
|
|
# | define(`_arg1', ``$1'')
|
|
|
|
# | define(`_foreach',
|
|
|
|
# | `ifelse($2, `()', ,
|
2000-02-08 21:43:58 +08:00
|
|
|
# | `define(`$1', `_arg1$2')$3`'_foreach(`$1', `(shift$2)', `$3')')')
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
#
|
|
|
|
# which this time answers
|
|
|
|
#
|
|
|
|
# => echo a
|
|
|
|
# => echo (b
|
|
|
|
# => echo c)
|
|
|
|
#
|
|
|
|
# Bingo!
|
|
|
|
|
|
|
|
|
|
|
|
# m4_foreach(VARIABLE, LIST, EXPRESSION)
|
|
|
|
# --------------------------------------
|
|
|
|
# Expand EXPRESSION assigning to VARIABLE each value of the LIST
|
|
|
|
# (LIST should have the form `[(item_1, item_2, ..., item_n)]'),
|
|
|
|
# i.e. the whole list should be *quoted*. Quote members too if
|
|
|
|
# you don't want them to be expanded.
|
|
|
|
#
|
|
|
|
# This macro is robust to active symbols:
|
|
|
|
# define(active, ACTIVE)
|
|
|
|
# m4_foreach([Var], [([active], [b], [active])], [-Var-])end
|
|
|
|
# => -active--b--active-end
|
|
|
|
define(m4_foreach,
|
|
|
|
[pushdef([$1], [])_m4_foreach($@)popdef([$1])])
|
|
|
|
|
2000-02-08 19:20:57 +08:00
|
|
|
# Low level macros used to define m4_foreach.
|
|
|
|
# Use m4_define for temporaries.
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
define(m4_car, [[$1]])
|
|
|
|
define(_m4_foreach,
|
|
|
|
[ifelse($2, [()], ,
|
2000-02-08 19:20:57 +08:00
|
|
|
[m4_define([$1], [m4_car$2])$3[]_m4_foreach([$1],
|
|
|
|
[(m4_shift$2)],
|
|
|
|
[$3])])])
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
|
|
|
|
|
2000-02-09 19:59:24 +08:00
|
|
|
## ----------------- ##
|
|
|
|
## Text processing. ##
|
|
|
|
## ----------------- ##
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
|
|
|
|
# m4_quote(STRING)
|
|
|
|
# ----------------
|
|
|
|
# Return STRING quoted.
|
|
|
|
#
|
|
|
|
# It is important to realize the difference between `quote(exp)' and
|
|
|
|
# `[exp]': in the first case you obtain the quoted *result* of the
|
|
|
|
# expansion of EXP, while in the latter you just obtain the string
|
|
|
|
# `exp'.
|
|
|
|
define([m4_quote], [[$@]])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_split(STRING, [REGEXP])
|
|
|
|
# --------------------------
|
2000-02-08 21:53:32 +08:00
|
|
|
#
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
# Split STRING into an m4 list of quoted elements. The elements are
|
|
|
|
# quoted with [ and ]. Beginning spaces and end spaces *are kept*.
|
|
|
|
# Use m4_strip to remove them.
|
|
|
|
#
|
|
|
|
# REGEXP specifies where to split. Default is [\t ]+.
|
2000-02-08 21:53:32 +08:00
|
|
|
#
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
# Pay attention to the changequotes. Inner changequotes exist for
|
|
|
|
# obvious reasons (we want to insert square brackets). Outer
|
|
|
|
# changequotes are needed because otherwise the m4 parser, when it
|
|
|
|
# sees the closing bracket we add to the result, believes it is the
|
2000-02-08 21:53:32 +08:00
|
|
|
# end of the body of the macro we define. And since the active quote
|
|
|
|
# when `define' is called are not the ones which were used in its
|
|
|
|
# definition, we cannot use `define' as defined above. Therefore,
|
|
|
|
# using m4's builtin `m4_define', which is indepedent from the
|
|
|
|
# current quotes, to define `m4_split', and then register `m4_split'
|
|
|
|
# in libm4.
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
#
|
2000-02-08 21:53:32 +08:00
|
|
|
# Also, notice that $1 is quoted twice, since we want the result to
|
|
|
|
# be quoted. Then you should understand that the argument of
|
|
|
|
# patsubst is ``STRING'' (i.e., with additional `` and '').
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
#
|
|
|
|
# This macro is safe on active symbols, i.e.:
|
|
|
|
# define(active, ACTIVE)
|
|
|
|
# m4_split([active active ])end
|
|
|
|
# => [active], [active], []end
|
2000-02-08 21:53:32 +08:00
|
|
|
|
|
|
|
changequote(<<, >>)
|
|
|
|
m4_define(m4_split,
|
|
|
|
<<changequote(``, '')dnl
|
|
|
|
[dnl Can't use m4_default here instead of ifelse, because m4_default uses
|
|
|
|
dnl [ and ] as quotes.
|
|
|
|
patsubst(````$1'''',
|
|
|
|
ifelse(``$2'',, ``[ ]+'', ``$2''),
|
|
|
|
``], ['')]dnl
|
|
|
|
changequote([, ])>>)
|
|
|
|
changequote([, ])
|
|
|
|
|
2000-02-10 17:46:57 +08:00
|
|
|
m4_namespace_register([m4_split], [libm4])
|
2000-02-08 21:53:32 +08:00
|
|
|
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
|
|
|
|
|
|
|
|
# m4_join(STRING)
|
|
|
|
# ---------------
|
|
|
|
# If STRING contains end of lines, replace them with spaces. If there
|
|
|
|
# are backslashed end of lines, remove them. This macro is safe with
|
|
|
|
# active symbols.
|
|
|
|
# define(active, ACTIVE)
|
|
|
|
# m4_join([active
|
|
|
|
# act\
|
|
|
|
# ive])end
|
|
|
|
# => active activeend
|
|
|
|
define([m4_join],
|
|
|
|
[translit(patsubst([[[$1]]], [\\
|
|
|
|
]), [
|
|
|
|
], [ ])])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_strip(STRING)
|
|
|
|
# ----------------
|
|
|
|
# Expands into STRING with tabs and spaces singled out into a single
|
|
|
|
# space, and removing leading and trailing spaces.
|
|
|
|
#
|
|
|
|
# This macro is robust to active symbols.
|
|
|
|
# define(active, ACTIVE)
|
|
|
|
# m4_strip([ active active ])end
|
|
|
|
# => active activeend
|
|
|
|
#
|
|
|
|
# This macro is fun! Because we want to preserve active symbols, STRING
|
|
|
|
# must be quoted for each evaluation, which explains there are 4 levels
|
|
|
|
# of brackets around $1 (don't forget that the result must be quoted
|
|
|
|
# too, hence one more quoting than applications).
|
|
|
|
#
|
|
|
|
# Then notice the patsubst of the middle: it is in charge of removing
|
|
|
|
# the leading space. Why not just `patsubst(..., [^ ])'? Because this
|
|
|
|
# macro will receive the output of the preceding patsubst, i.e. more or
|
|
|
|
# less [[STRING]]. So if there is a leading space in STRING, then it is
|
|
|
|
# the *third* character, since there are two leading `['; Equally for
|
|
|
|
# the outer patsubst.
|
|
|
|
define([m4_strip],
|
|
|
|
[patsubst(patsubst(patsubst([[[[$1]]]],
|
|
|
|
[[ ]+], [ ]),
|
|
|
|
[^\(..\) ], [\1]),
|
|
|
|
[ \(.\)$], [\1])])
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# m4_append(MACRO-NAME, STRING)
|
|
|
|
# -----------------------------
|
|
|
|
# Redefine MACRO-NAME to hold its former content plus STRING at the
|
|
|
|
# end. It is valid to use this macro with MACRO-NAME undefined.
|
|
|
|
#
|
|
|
|
# This macro is robust to active symbols. It can be used to grow
|
|
|
|
# strings.
|
|
|
|
#
|
|
|
|
# | define(active, ACTIVE)
|
|
|
|
# | m4_append([sentence], [This is an])
|
|
|
|
# | m4_append([sentence], [ active ])
|
|
|
|
# | m4_append([sentence], [symbol.])
|
|
|
|
# | sentence
|
|
|
|
# | undefine([active])dnl
|
|
|
|
# | sentence
|
|
|
|
# => This is an ACTIVE symbol.
|
|
|
|
# => This is an active symbol.
|
|
|
|
#
|
|
|
|
# It can be used to define hooks.
|
|
|
|
#
|
|
|
|
# | define(active, ACTIVE)
|
|
|
|
# | m4_append([hooks], [define([act1], [act2])])
|
|
|
|
# | m4_append([hooks], [define([act2], [active])])
|
|
|
|
# | undefine([active])
|
|
|
|
# | act1
|
|
|
|
# | hooks
|
|
|
|
# | act1
|
|
|
|
# => act1
|
|
|
|
# =>
|
|
|
|
# => active
|
|
|
|
define(m4_append,
|
|
|
|
[define([$1],
|
|
|
|
ifdef([$1], [defn([$1])])[$2])])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_list_append(MACRO-NAME, STRING)
|
|
|
|
# ----------------------------------
|
|
|
|
# Same as `m4_append', but each element is separated by `, '.
|
|
|
|
define(m4_list_append,
|
|
|
|
[define([$1],
|
|
|
|
ifdef([$1], [defn([$1]), ])[$2])])
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2000-02-08 19:20:57 +08:00
|
|
|
## ----------------------------------- ##
|
|
|
|
## Helping macros to display strings. ##
|
|
|
|
## ----------------------------------- ##
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
|
|
|
|
|
|
|
|
# m4_wrap(STRING, [PREFIX], [FIRST-PREFIX], [WIDTH])
|
|
|
|
# --------------------------------------------------
|
|
|
|
# Expands into STRING wrapped to hold in WIDTH columns (default = 79).
|
|
|
|
# If prefix is set, each line is prefixed with it. If FIRST-PREFIX is
|
|
|
|
# specified, then the first line is prefixed with it. As a special
|
|
|
|
# case, if the length of the first prefix is greater than that of
|
|
|
|
# PREFIX, then FIRST-PREFIX will be left alone on the first line.
|
|
|
|
#
|
|
|
|
# Typical outputs are:
|
|
|
|
#
|
|
|
|
# m4_wrap([Short string */], [ ], [/* ], 20)
|
|
|
|
# => /* Short string */
|
|
|
|
#
|
|
|
|
# m4_wrap([Much longer string */], [ ], [/* ], 20)
|
|
|
|
# => /* Much longer
|
|
|
|
# => string */
|
|
|
|
#
|
|
|
|
# m4_wrap([Short doc.], [ ], [ --short ], 30)
|
|
|
|
# => --short Short doc.
|
|
|
|
#
|
|
|
|
# m4_wrap([Short doc.], [ ], [ --too-wide ], 30)
|
|
|
|
# => --too-wide
|
|
|
|
# => Short doc.
|
|
|
|
#
|
|
|
|
# m4_wrap([Super long documentation.], [ ], [ --too-wide ], 30)
|
|
|
|
# => --too-wide
|
|
|
|
# => Super long
|
|
|
|
# => documentation.
|
|
|
|
#
|
|
|
|
# FIXME: there is no checking of a longer PREFIX than WIDTH, but do
|
|
|
|
# we really want to bother with people trying each single corner
|
|
|
|
# of a software?
|
|
|
|
#
|
|
|
|
# This macro does not leave a trailing space behind the last word,
|
|
|
|
# what complicates it a bit. The algorithm is stupid simple: all the
|
|
|
|
# words are preceded by m4_Separator which is defined to empty for the
|
|
|
|
# first word, and then ` ' (single space) for all the others.
|
|
|
|
define([m4_wrap],
|
|
|
|
[pushdef([m4_Prefix], m4_default([$2], []))dnl
|
|
|
|
pushdef([m4_Prefix1], m4_default([$3], [m4_Prefix]))dnl
|
|
|
|
pushdef([m4_Width], m4_default([$4], 79))dnl
|
|
|
|
pushdef([m4_Cursor], len(m4_Prefix1))dnl
|
|
|
|
pushdef([m4_Separator], [])dnl
|
|
|
|
m4_Prefix1[]dnl
|
|
|
|
ifelse(m4_eval(m4_Cursor > len(m4_Prefix)),
|
|
|
|
1, [define([m4_Cursor], len(m4_Prefix))
|
|
|
|
m4_Prefix])[]dnl
|
|
|
|
m4_foreach([m4_Word], (m4_split(m4_strip(m4_join([$1])))),
|
2000-02-08 19:20:57 +08:00
|
|
|
[m4_define([m4_Cursor], m4_eval(m4_Cursor + len(m4_Word) + 1))dnl
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
dnl New line if too long, else insert a space unless it is the first
|
|
|
|
dnl of the words.
|
|
|
|
ifelse(m4_eval(m4_Cursor > m4_Width),
|
|
|
|
1, [define([m4_Cursor], m4_eval(len(m4_Prefix) + len(m4_Word) + 1))]
|
|
|
|
m4_Prefix,
|
|
|
|
[m4_Separator])[]dnl
|
|
|
|
m4_Word[]dnl
|
2000-02-08 19:20:57 +08:00
|
|
|
m4_define([m4_Separator], [ ])])dnl
|
Create libm4.m4.
* Makefile.am: Adjusted for libm4.m4.
* acgeneral.m4 (m4_errprint, m4_warn, m4_fatal, m4_prefix,
m4_eval, m4_shift, m4_format, m4_include_unique, m4_include,
m4_sinclude, m4_quote, m4_split, m4_join, m4_strip, m4_append,
m4_list_append, ifval, ifset, m4_default, m4_case, m4_match,
m4_foreach): Moved from here, to...
* libm4.m4: here.
* acgeneral.m4 (AC_WRAP): Moved from here, to...
* libm4.m4 (m4_wrap): here. All callers changed.
* acgeneral.m4: Don't include acversion.m4.
* autoconf.m4: Include libm4.m4 and acversion.m4.
* autoheader.m4: Likewise.
2000-02-08 01:42:03 +08:00
|
|
|
popdef([m4_Separator])dnl
|
|
|
|
popdef([m4_Cursor])dnl
|
|
|
|
popdef([m4_Width])dnl
|
|
|
|
popdef([m4_Prefix1])dnl
|
|
|
|
popdef([m4_Prefix])dnl
|
|
|
|
])
|
2000-02-09 19:59:24 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## ------------------- ##
|
|
|
|
## Number processing. ##
|
|
|
|
## ------------------- ##
|
|
|
|
|
|
|
|
# m4_sign(A)
|
|
|
|
# ----------
|
|
|
|
#
|
|
|
|
# The sign of the integer A.
|
|
|
|
define(m4_sign,
|
|
|
|
[m4_match([$1],
|
|
|
|
[^-], -1,
|
|
|
|
[^0+], 0,
|
|
|
|
1)])
|
|
|
|
|
|
|
|
# m4_cmp(A, B)
|
|
|
|
# ------------
|
|
|
|
#
|
|
|
|
# Compare two integers.
|
|
|
|
# A < B -> -1
|
|
|
|
# A = B -> 0
|
|
|
|
# A > B -> 1
|
|
|
|
define(m4_cmp,
|
|
|
|
[m4_sign(m4_eval([$1 - $2]))])
|
|
|
|
|
|
|
|
|
|
|
|
# m4_list_cmp(A, B)
|
|
|
|
# -----------------
|
|
|
|
#
|
|
|
|
# Compare the two lists of integers A and B. For instance:
|
|
|
|
# m4_list_cmp((1, 0), (1)) -> 0
|
|
|
|
# m4_list_cmp((1, 0), (1, 0)) -> 0
|
|
|
|
# m4_list_cmp((1, 2), (1, 0)) -> 1
|
|
|
|
# m4_list_cmp((1, 2, 3), (1, 2)) -> 1
|
|
|
|
# m4_list_cmp((1, 2, -3), (1, 2)) -> -1
|
|
|
|
# m4_list_cmp((1, 0), (1, 2)) -> -1
|
|
|
|
# m4_list_cmp((1), (1, 2)) -> -1
|
|
|
|
define(m4_list_cmp,
|
|
|
|
[ifelse([$1$2], [()()], 0,
|
|
|
|
[$1], [()], [m4_list_cmp((0), [$2])],
|
|
|
|
[$2], [()], [m4_list_cmp([$1], (0))],
|
|
|
|
[m4_case(m4_cmp(m4_car$1, m4_car$2),
|
|
|
|
-1, -1,
|
|
|
|
1, 1,
|
|
|
|
0, [m4_list_cmp((m4_shift$1), (m4_shift$2))])])])
|