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64 lines
1.7 KiB
Awk
Executable file
64 lines
1.7 KiB
Awk
Executable file
#!/usr/bin/gawk -E
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# Copyright (c) 2019,2020 rusty-snake
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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function errexit(msg) {
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print msg > "/dev/stderr"
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exit 1
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}
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BEGIN {
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macros[0] = 0
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for (arg in ARGV) {
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if (ARGV[arg] ~ /^-D[A-Z_]+$/) {
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macros[length(macros) + 1] = substr(ARGV[arg], 3)
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} else {
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if (ARGV[arg] == "gawk" || ARGV[arg] == "awk")
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continue
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# errexit("Invalid commandline argument" ARGV[arg])
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}
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ARGV[arg] = ""
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}
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include = 1
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}
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/^#ifdef [A-Z_]+$/ {
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macro = substr($0, 8)
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for (i in macros) {
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if (macros[i] == macro) {
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include = 1
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next
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}
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}
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include = 0
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}
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/^#if 0$/ {
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include = 0
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next
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}
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/^#endif$/ {
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include = 1
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next
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}
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{
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if (include)
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print
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}
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