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#! /usr/bin/env tclsh









set modulus 16777259


proc filed_hash {str mod} {
	set retval [expr {$mod - 1}]
	set prev [expr {$mod % 255}]
	for {set idx 0} {$idx < [string length $str]} {incr idx} {
		set curr [string index $str $idx]
		binary scan $curr H* curr
		set curr [format %u 0x$curr]


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#! /usr/bin/env tclsh

if {[llength $argv] != 1} {
	puts stderr "Usage: generate-mime-type <file>"

	exit 1
}

set mimeinfofile [lindex $argv 0]

set modulus 16777259

# Must match what is in filed.c
proc filed_hash {str mod} {
	set retval [expr {$mod - 1}]
	set prev [expr {$mod % 255}]
	for {set idx 0} {$idx < [string length $str]} {incr idx} {
		set curr [string index $str $idx]
		binary scan $curr H* curr
		set curr [format %u 0x$curr]
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	set retval [expr {$retval % $mod}]

	return $retval

}

set mimeinfofile "/etc/httpd/mime.types"

set fd [open $mimeinfofile]
set mimeinfo [read $fd]
close $fd


foreach line [split $mimeinfo "\n"] {
	regsub {#.*} $line {} line
	set line [string trim $line]

	if {$line == ""} {
		continue
	}







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	set retval [expr {$retval % $mod}]

	return $retval

}


# Read contents of mime types file
set fd [open $mimeinfofile]
set mimeinfo [read $fd]
close $fd

# Parse into type and extensions pairs
foreach line [split $mimeinfo "\n"] {
	regsub {#.*} $line {} line
	set line [string trim $line]

	if {$line == ""} {
		continue
	}
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			continue
		}

		set extensioninfo($extension) $mime
	}
}



foreach extension [array names extensioninfo] {
	set hash_id [filed_hash $extension $modulus]

	lappend hashinfo($hash_id) $extension

}


puts "\tswitch (filed_hash((const unsigned char *) p, $modulus)) \{"
foreach hash [lsort -integer -increasing [array names hashinfo]] {
	puts "\t\tcase $hash:"
	foreach extension $hashinfo($hash) {
		puts "\t\t\tif (strcmp(p, \"$extension\") == 0) \{"
		puts "\t\t\t\treturn(\"$extensioninfo($extension)\");"
		puts "\t\t\t\}"
	}
	puts "\t\t\treturn(FILED_DEFAULT_TYPE);"
}
puts "\t\}"










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			continue
		}

		set extensioninfo($extension) $mime
	}
}

# For every extension, generate a hash
# For every hash, note the extension
foreach extension [array names extensioninfo] {
	set hash_id [filed_hash $extension $modulus]

	lappend hashinfo($hash_id) $extension

}

# Emit a C fragment to take a pointer (p) to an extension determine the mime type
puts "\tswitch (filed_hash((const unsigned char *) p, $modulus)) \{"
foreach hash [lsort -integer -increasing [array names hashinfo]] {
	puts "\t\tcase $hash:"
	foreach extension $hashinfo($hash) {
		puts "\t\t\tif (strcmp(p, \"$extension\") == 0) \{"
		puts "\t\t\t\treturn(\"$extensioninfo($extension)\");"
		puts "\t\t\t\}"
	}
	puts "\t\t\treturn(FILED_DEFAULT_TYPE);"
}
puts "\t\}"

# Declare victory
exit 0