#!/usr/bin/awk -f

BEGIN {
	if (ARGC != 3) {
		print "Usage gen_vendors pciidsfile vendorheader" > "/dev/stderr"
		exit 1
	}
	pci_file=ARGV[1]
	header_file=ARGV[2]
	while ((getline < header_file) > 0) {
		if (NF == 3 && $1 == "#define")
			vendors[$3] = $2
	}
	while ((getline < pci_file) > 0) {
		if ($0 ~ "^[0-9a-f]+" && ! vendors["0x"$1]) {
			key="0x"$1
			$1=""
			vendors[key] = toupper(substr($0, 2))
		}
	}
	guard=header_file
	gsub(/\./, "_", guard);
	print "/* This file is semi autogenerated, do not manual edit */" > header_file
	print "#ifndef _"toupper(guard)"_" > header_file
	print "#define _"toupper(guard)"_" > header_file
	print ""> header_file
	for (i in vendors) {
		gsub(/[ \.\)\(-\/\+\']/, "_", vendors[i])
		gsub(/[",\?&]/, "", vendors[i])
		gsub(/__/, "", vendors[i])
		if (vendors[i] ~ /^PCI_VENDOR/) {
			print "#define "vendors[i]" "i > header_file
		} else {
			print "#define PCI_VENDOR_"vendors[i]" "i > header_file
		}
	}
	print "#endif" > header_file
}