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#!/bin/sh
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# filter stdin or file for words related to
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# the specified target architecture
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#
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# args: [-a arch] [-i file]
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if [ "$1" = "-a" -a -n "$2" ]; then
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a="$2"
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shift 2
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else
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cat
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exit
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fi
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if [ "$1" = "-i" -a -w "$2" ]; then
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f="$2"
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t="`mktemp`"
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fi
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# map meta-arches for prefiltering
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# NB: biarch gets special expansion later
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case "$a" in
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i586)
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A="(IA32|X86)";;
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x86_64)
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A="X86";;
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e2k*)
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A="E2K";;
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aarch64|arm*)
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A="ARM";;
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*)
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A=;;
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esac
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# NB: pipe runs in parallel => faster than -e -e
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cat ${f:+"$f"} |
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sed -r ':loop; s/^((([^@]+@!)[^,]+)+),([a-zA-Z0-9_]+)/\1@!\4/; t loop' |
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sed -r ':loop; s/^((([^@]+@)[^,]+)+),([a-zA-Z0-9_]+)/\1\n\3\4/; t loop' |
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sed -rn "s/\<([^@ ]*)\>|\<([^@ ]*)@$A\>[^ ]*\>/\1\2/pg" |
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sed -rn "s/\<([^@ ]*)\>|\<[^ ]*@\!$A\>[^ ]*\> */\1/pg" |
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sed -r "s/\<([^@ ]*)@IA32\>/\1@i586 i586-\1@x86_64/g" |
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sed -rn "s/\<([^@ ]*)\>|\<([^@ ]*)@$a\>[^ ]*\>/\1\2/pg" |
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sed -rn "s/\<([^@ ]*)\>|\<[^ ]*@\!$a\>[^ ]*\> */\1/pg" |
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sed -r "s/\<([^@ ]*)@\![^ ]+\>/\1/g" |
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sed -r "s/\<([^@ ]*)@[^@ ]+\> *//g" |
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sed -r "s/^ +//;s/ +$//;/^$/d" |
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if [ -n "$f" ]; then
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cat > "$t" && mv "$t" "$f"
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else
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cat
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fi
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# stick this for debugging sed pipeline and run the script
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# with >/dev/null to see what flows in a particular place:
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# tee /dev/stderr |
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