start C compiler

05/main.b

@@ -0,0 +1,46 @@
+; add 24 + 16 = 40 to the stack pointer to put argc, argv in the right place
+byte 0x48
+byte 0x81
+byte 0xc4
+byte 40
+byte 0
+byte 0
+byte 0
+goto main
+
+#include util.b
+#include constants.b
+#include preprocess.b
+
+function main
+	argument argv2
+	argument argv1
+	argument argv0
+	argument argc
+	local input_filename
+	local output_filename
+	
+	input_filename = .str_default_input_filename
+	output_filename = .str_default_output_filename
+	if argc == 1 goto have_filenames
+	if argc != 3 goto usage_error
+	input_filename = argv1
+	output_filename = argv2
+	:have_filenames
+	split_into_preprocessing_tokens(input_filename)
+	exit(0)
+
+:usage_error
+	fputs(2, .str_usage_error)
+	exit(1)
+
+:str_usage_error
+	string Please either specify no arguments or an input and output file.
+
+:str_default_input_filename
+	string main.c
+	byte 0
+	
+:str_default_output_filename
+	string a.out
+	byte 0