acinclude/ltsugar.m4
author Ryan C. Gordon <icculus@icculus.org>
Sun, 21 Oct 2018 22:40:17 -0400
changeset 12345 50e1cca28b39
parent 6442 2d3caa191dc4
permissions -rw-r--r--
wasapi/win32: Sort initial device lists by device GUID.

This makes an unchanged set of hardware always report devices in the same
order on each run.
     1 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
     2 #
     3 # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
     4 # Written by Gary V. Vaughan, 2004
     5 #
     6 # This file is free software; the Free Software Foundation gives
     7 # unlimited permission to copy and/or distribute it, with or without
     8 # modifications, as long as this notice is preserved.
     9 
    10 # serial 6 ltsugar.m4
    11 
    12 # This is to help aclocal find these macros, as it can't see m4_define.
    13 AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
    14 
    15 
    16 # lt_join(SEP, ARG1, [ARG2...])
    17 # -----------------------------
    18 # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
    19 # associated separator.
    20 # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
    21 # versions in m4sugar had bugs.
    22 m4_define([lt_join],
    23 [m4_if([$#], [1], [],
    24        [$#], [2], [[$2]],
    25        [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
    26 m4_define([_lt_join],
    27 [m4_if([$#$2], [2], [],
    28        [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
    29 
    30 
    31 # lt_car(LIST)
    32 # lt_cdr(LIST)
    33 # ------------
    34 # Manipulate m4 lists.
    35 # These macros are necessary as long as will still need to support
    36 # Autoconf-2.59 which quotes differently.
    37 m4_define([lt_car], [[$1]])
    38 m4_define([lt_cdr],
    39 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
    40        [$#], 1, [],
    41        [m4_dquote(m4_shift($@))])])
    42 m4_define([lt_unquote], $1)
    43 
    44 
    45 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
    46 # ------------------------------------------
    47 # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
    48 # Note that neither SEPARATOR nor STRING are expanded; they are appended
    49 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
    50 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
    51 # than defined and empty).
    52 #
    53 # This macro is needed until we can rely on Autoconf 2.62, since earlier
    54 # versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
    55 m4_define([lt_append],
    56 [m4_define([$1],
    57 	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
    58 
    59 
    60 
    61 # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
    62 # ----------------------------------------------------------
    63 # Produce a SEP delimited list of all paired combinations of elements of
    64 # PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
    65 # has the form PREFIXmINFIXSUFFIXn.
    66 # Needed until we can rely on m4_combine added in Autoconf 2.62.
    67 m4_define([lt_combine],
    68 [m4_if(m4_eval([$# > 3]), [1],
    69        [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
    70 [[m4_foreach([_Lt_prefix], [$2],
    71 	     [m4_foreach([_Lt_suffix],
    72 		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
    73 	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
    74 
    75 
    76 # lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
    77 # -----------------------------------------------------------------------
    78 # Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
    79 # by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
    80 m4_define([lt_if_append_uniq],
    81 [m4_ifdef([$1],
    82 	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
    83 		 [lt_append([$1], [$2], [$3])$4],
    84 		 [$5])],
    85 	  [lt_append([$1], [$2], [$3])$4])])
    86 
    87 
    88 # lt_dict_add(DICT, KEY, VALUE)
    89 # -----------------------------
    90 m4_define([lt_dict_add],
    91 [m4_define([$1($2)], [$3])])
    92 
    93 
    94 # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
    95 # --------------------------------------------
    96 m4_define([lt_dict_add_subkey],
    97 [m4_define([$1($2:$3)], [$4])])
    98 
    99 
   100 # lt_dict_fetch(DICT, KEY, [SUBKEY])
   101 # ----------------------------------
   102 m4_define([lt_dict_fetch],
   103 [m4_ifval([$3],
   104 	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
   105     m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
   106 
   107 
   108 # lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
   109 # -----------------------------------------------------------------
   110 m4_define([lt_if_dict_fetch],
   111 [m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
   112 	[$5],
   113     [$6])])
   114 
   115 
   116 # lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
   117 # --------------------------------------------------------------
   118 m4_define([lt_dict_filter],
   119 [m4_if([$5], [], [],
   120   [lt_join(m4_quote(m4_default([$4], [[, ]])),
   121            lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
   122 		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
   123 ])