#!/usr/bin/env python
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import sys
import os

def xxd(filename, fout):
	f = open(filename, "rb")
	bytes = f.read()

	i = 0
	fout.write("\t")
	for byte in bytes:
		if isinstance(byte, str):
			byte = ord(byte)
		fout.write("0x%02x, " % byte)
		if i == 7:
			fout.write("\n\t")
			i = 0
		else:
			i += 1

def main(args):
	filter         = args[1]
	#CUDA_DIR      = args[2].replace("\\","/") #re-enable in case we update to newer LLVM
	MISRC_DIR      = args[2].replace("\\","/")
	IntDir         = args[3]

	#LIBDEVICE_DIR = CUDA_DIR + "/nvvm/libdevice" #re-enable in case we update to newer LLVM
	LIBDEVICE_DIR = MISRC_DIR + "/libdevice"

	# to support old python versions having problems executing
	# relative path with forward slashes under windows
	if filter[0] == '.':
		filter = os.getcwd() + "/" + filter
	version = 10
	bc_name  = "libdevice.%u.bc" % (version)
	out_name = "glue_libdevice.h"

	print("Stripping %s ..." % bc_name)
	cmd_line = (filter +
		" \"" + LIBDEVICE_DIR + "/" + bc_name + "\" \"" +
		IntDir + "/" + bc_name + "\"")
	exit_code = os.system(cmd_line)
	if exit_code != 0:
		sys.stderr.write ("ERROR: command %s exited unexpectedly, exitcode %d\n" % (cmd_line, exit_code))
		sys.exit (1)

	print("Generating %s ..." % out_name)
	f = open(IntDir + "/" + out_name, "w")
	f.write("static unsigned char const glue_bitcode[] = {\n")
	xxd(IntDir + "/" + bc_name, f)
	f.write("};\n")
	f.close()

if __name__ == "__main__":
	main(sys.argv)
