plan9fox/sys/src/9/xen/cppx

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#!/bin/rc
awk '
function qq(s) {
gsub("\"", "£", s)
return "\"@" s "\""
}
/^#include/ { next
}
/^#define.*\\$/ {
save[n++] = $0
print qq($0 "\\")
next
}
(n > 0) && /\\$/ {
save[n++] = $0
print qq($0 "\\")
next
}
(n > 0) {
save[n++] = $0
print qq($0)
for (i = 0; i < n; i++) print save[i]
n = 0
next
}
/^# *((define)|(error)).*[^\\]*$/ {
print qq($0)
print
next
}
/^# *undef.*[^\\]*$/ {
print
print qq($0)
next
}
{ print
}
' $* |
cpp -P |
sed -e 's/£/"/g' -e 's/^"@(.*\\)\\"$/\1/' -e 's/^"@(.*)"$/\1/'