Add mruby-print

1 files changed, 64 insertions, 0 deletions

diff --git a/mrbgems/mruby-print/mrblib/print.rb b/mrbgems/mruby-print/mrblib/print.rb
new file mode 100644
index 000000000..38a10661b
--- /dev/null
+++ b/mrbgems/mruby-print/mrblib/print.rb
@@ -0,0 +1,64 @@
+##
+# Kernel
+#
+# ISO 15.3.1
+module Kernel
+  ##
+  # Invoke method +print+ on STDOUT and passing +*args+
+  #
+  # ISO 15.3.1.2.10
+  def print(*args)
+    i = 0
+    len = args.size
+    while i < len
+      __printstr__ args[i].to_s
+      i += 1
+    end
+  end
+
+  ##
+  # Invoke method +puts+ on STDOUT and passing +*args*+
+  #
+  # ISO 15.3.1.2.11
+  def puts(*args)
+    i = 0
+    len = args.size
+    while i < len
+      s = args[i].to_s
+      __printstr__ s
+      __printstr__ "\n" if (s[-1] != "\n")
+      i += 1
+    end
+    __printstr__ "\n" if len == 0
+    nil
+  end
+
+  ##
+  # Print human readable object description
+  #
+  # ISO 15.3.1.3.34
+  def p(*args)
+    i = 0
+    len = args.size
+    while i < len
+      __printstr__ args[i].inspect
+      __printstr__ "\n"
+      i += 1
+    end
+    args[0]
+  end
+
+  unless Kernel.respond_to?(:sprintf)
+    def printf(*args)
+      raise NotImplementedError.new('printf not available')
+    end
+    def sprintf(*args)
+      raise NotImplementedError.new('sprintf not available')
+    end
+  else
+    def printf(*args)
+      __printstr__(sprintf(*args))
+      nil
+    end
+  end
+end