1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
# file : build/meta/common.m4
# author : Boris Kolpackov <boris@codesynthesis.com>
# copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
# license : GNU GPL v2; see accompanying LICENSE file
# m4_strip(STRING)
# ----------------
# Expands into STRING with tabs and spaces singled out into a single
# space, and removing leading and trailing spaces.
#
m4_define([m4_strip],
[m4_patsubst(m4_patsubst([ $1 ], [[ ]+], [ ]), [^ \(.*\) $], [[[\1]]])])
# m4_normalize(STRING)
# --------------------
# Apply m4_strip to STRING.
#
m4_define([m4_normalize], [m4_strip([$1])])
# m4_split(STRING, [REGEXP])
# --------------------------
# 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 ]+.
#
# If STRING is empty, the result is an empty list.
#
m4_define([m4_split],
[m4_ifelse([$1], [], [],
[$2], [ ], [m4_ifelse(m4_index([$1], [ ]), [-1], [[[$1]]],
[_$0([$1], [$2], [, ])])],
[$2], [], [_$0([$1], [[ ]+], [, ])],
[_$0([$1], [$2], [, ])])])
m4_define([_m4_split], [m4_patsubst([$1], [$2], [$3])])
# Simple foreach implementation. The list elements are expected to
# be fully expanded.
#
m4_define([m4_foreach], [m4_ifelse([$2], [], [],
[m4_pushdef([$1])_$0([$1], [$3], [], $2)m4_popdef([$1])])])
m4_define([_m4_foreach], [m4_ifelse([$#], [3], [],
[m4_define([$1], [$4])$2[]$0([$1], [$2],
m4_shift(m4_shift(m4_shift($@))))])])
# m4_foreach_w(VARIABLE, LIST, EXPRESSION)
# ----------------------------------------
# Like m4_foreach, but the list is whitespace separated.
#
m4_define([m4_foreach_w],
[m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])
# m4_strip_nl(STRING)
# ----------------------------------------
# Remove newlines
#
m4_define([m4_strip_nl], [m4_patsubst([$1], [
], [])])
# Enable/disable quoting.
#
m4_define([m4_equote], [m4_changequote([,])])
m4_define([m4_dquote], [m4_changequote([])])
#
#
m4_define([__env_impl__], [m4_esyscmd([echo -n $$1])])
m4_define([__env__], [m4_equote()__env_impl__([$1])[]m4_dquote()])
m4_define([__value_impl__], [__env_impl__([$1])])
m4_define([__value__], [m4_equote()__value_impl__([$1])[]m4_dquote()])
|
