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# ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-

#

# Copyright (C) 2004, 2005 Free Software Foundation, Inc.

# Written by Gary V. Vaughan.

#

# This file is free software; the Free Software Foundation gives

# unlimited permission to copy and/or distribute it, with or without

# modifications, as long as this notice is preserved.

# serial 3 ltsugar.m4

# This is to help aclocal find these macros, as it can't see m4_define.

AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])

# lt_join(SEP, ARG1, [ARG2...])

# -----------------------------

# Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their

# associated separator.

m4_define([lt_join],

[m4_case([$#],

         [0], [m4_fatal([$0: too few arguments: $#])],

         [1], [],

         [2], [[$2]],

         [m4_ifval([$2],

                   [[$2][]m4_foreach(_lt_Arg, lt_car([m4_shiftn(2, $@)]),

                           [_$0([$1], _lt_Arg)])],

                   [$0([$1], m4_shiftn(2, $@))])])[]dnl

])

m4_define([_lt_join],

[m4_ifval([$2],[$1][$2])[]dnl

])

# lt_car(LIST)

# lt_cdr(LIST)

# ------------

# Manipulate m4 lists.

# These macros are necessary as long as will still need to support

# Autoconf-2.59 which quotes differently.

m4_define([lt_car], [[$1]])

m4_define([lt_cdr],

[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],

       [$#], 1, [],

       [m4_dquote(m4_shift($@))])])

m4_define([lt_unquote], $1)

# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])

# ----------------------------------------------------------

# Produce a SEP delimited list of all paired combinations of elements of

# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list

# has the form PREFIXmINFIXSUFFIXn.

m4_define([lt_combine],

[m4_if([$2], [], [],

  [m4_if([$4], [], [],

    [lt_join(m4_quote(m4_default([$1], [[, ]])),

      lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_prefix, [$2],

                   [m4_foreach(_Lt_suffix, lt_car([m4_shiftn(3, $@)]),

                               [_Lt_prefix[]$3[]_Lt_suffix ])])))))])])dnl

])

# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])

# -----------------------------------------------------------------------

# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited

# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.

m4_define([lt_if_append_uniq],

[m4_ifdef([$1],

        [m4_bmatch($3[]m4_defn([$1])$3, $3[]m4_re_escape([$2])$3,

                [$5],

            [m4_append([$1], [$2], [$3])$4])],

    [m4_append([$1], [$2], [$3])$4])])

# lt_dict_add(DICT, KEY, VALUE)

# -----------------------------

m4_define([lt_dict_add],

[m4_define([$1($2)], [$4])])

# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)

# --------------------------------------------

m4_define([lt_dict_add_subkey],

[m4_define([$1($2:$3)], [$4])])

# lt_dict_fetch(DICT, KEY, [SUBKEY])

# ----------------------------------

m4_define([lt_dict_fetch],

[m4_ifval([$3],

        m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),

    m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])

# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])

# -----------------------------------------------------------------

m4_define([lt_if_dict_fetch],

[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],

        [$5],

    [$6])])

# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])

# --------------------------------------------------------------

m4_define([lt_dict_filter],

[m4_if([$5], [], [],

  [lt_join(m4_quote(m4_default([$4], [[, ]])),

           lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),

                      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl

])