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
|
#!/usr/bin/env bash
set -o errexit -o pipefail -o posix
# Copyright (c) 2019-2025 Cosmin Truta.
#
# Use, modification and distribution are subject to the MIT License.
# Please see the accompanying file LICENSE_MIT.txt
#
# SPDX-License-Identifier: MIT
# shellcheck source=ci/lib/ci.lib.sh
source "$(dirname "$0")/../lib/ci.lib.sh"
function ci_shellify_c {
# Convert C preprocessor text, specifically originating
# from png.h, to shell scripting text.
# Select only the easy-to-parse definitions of PNG_LIBPNG_*.
sed -n -e '/^\# *define * PNG_LIBPNG_[^ ]* * ["0-9A-Za-z_]/ p' |
sed -e 's/^\# *define * PNG\([^ ]*\) * \([^ ]*\)/PNG\1=\2/' \
-e 's/=PNG\([0-9A-Za-z_]*\)/=\${PNG\1}/' \
-e 's/^\([^ ]*=[^ ]*\).*$/export \1;/'
}
function usage {
echo "usage: $CI_SCRIPT_NAME [<options>] png.h"
echo "options: -?|-h|--help"
exit "${@:-0}"
}
function main {
local opt
while getopts ":" opt
do
# This ain't a while-loop. It only pretends to be.
[[ $1 == -[?h]* || $1 == --help || $1 == --help=* ]] && usage 0
ci_err "unknown option: '$1'"
done
shift $((OPTIND - 1))
[[ $# -eq 0 ]] && usage 2
[[ $# -eq 1 ]] || ci_err "too many operands"
# And... go!
test -e "$1" || ci_err "no such file: '$1'"
[[ $(basename -- "$1") == png.h ]] || {
ci_err "incorrect operand: '$1' (expecting: 'png.h')"
}
ci_shellify_c <"$1"
}
main "$@"
|
