Module: MRubyTools::C

Defined in:
lib/mruby_tools.rb

Class Method Summary collapse

Class Method Details

.slurp_rb(rb_filename, indent: ' ') ⇒ Object 



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# File 'lib/mruby_tools.rb', line 84

def self.slurp_rb(rb_filename, indent: '  ')
  c_str = File.read(rb_filename)
  size = c_str.size
  c_str = c_str.gsub("\n", '\n').gsub('"', '\"')
  [ "/* #{rb_filename} */",
    'mrb_load_nstring(mrb, "' + c_str + '", ' + "#{size});",
    "check_exc(mrb, \"#{rb_filename}\");",
  ].map { |s| indent + s }.join("\n")
end

.wrapper(rb_files) ⇒ Object 



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# File 'lib/mruby_tools.rb', line 43

def self.wrapper(rb_files)
  c_code = "#include <stdlib.h>\n#include <mruby.h>\n#include <mruby/compile.h>\n#include <mruby/string.h>\n\nvoid check_exc(mrb_state *mrb, char *filename) {\n  if (mrb->exc) {\nmrb_value exc = mrb_obj_value(mrb->exc);\nmrb_value exc_msg = mrb_funcall(mrb, exc, \"to_s\", 0);\nfprintf(stderr, \"ERROR in %s - %s: %s\\n\",\n        filename,\n        mrb_obj_classname(mrb, exc),\n        mrb_str_to_cstr(mrb, exc_msg));\n/* mrb_print_backtrace(mrb);   # empty */\nexit(1);\n  }\n}\n\nint\nmain(void)\n{\n  mrb_state *mrb = mrb_open();\n  if (!mrb) {\nprintf(\"mrb problem\");\nexit(1);\n  }\n"
  c_code += rb_files.map { |rbf|
    "\n" + self.slurp_rb(rbf) + "\n\n"
  }.join

  c_code += "  mrb_close(mrb);\n  return 0;\n}\n"
  c_code
end