Silence warning compiling against Ruby 1.9

Silence this warning:

  mkdtemp.c:52: warning: format ‘%d’ expects type ‘int’, but argument 3
  has type ‘long int’

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Don't write directly to Ruby String object storage

Rather than overwriting part of the buffer that Ruby uses to store the
template String, create a temporary C string for use with mkdtemp.

In practice, there has never been a problem with this kind of direct
manipulation of Ruby String storage with any version of Ruby that I have
tested, but just to be future-proof we err on the side of caution here.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Use RSTRING_PTR macro for Ruby 1.9 compatibility

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Add specs

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Ignore "html" and "pkg" directories

These can be regenerated on the fly so no sense in tracking them in the
repository.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Use RubyForge as homepage

Alter the GemSpec to point to the RubyForge site as the official project
page.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Set up RDoc

Provide a top-level README and a Rake task for building RDoc
documentation.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Changes to rakefile to get the extension building

Some paths have changed (the extension was one directory deeper) when it
was in Walrus, and the GemSpec obviously needs to be updated as well.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Add notes about platform variation in the mkdtemp() function

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Update copyright range to include 2008

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Remove reference to Walrus in function name

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Style changes: declaration after statement

Move declarations so that they are prior to statements and remove
unnecessary temporary variable.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Avoid unnecessary reallocation in mkdtemp function

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Clarify and re-format comments

Note that the template is overwritten in-place if supplied. Reformat for
better display in narrow terminals.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Ignore built products in "ext" directory

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Add version file

This adds a version number constant, Dir::Mkdtemp::VERSION.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Add license file

Signed-off-by: Wincent Colaiuta <win@wincent.com>

Initial import from Walrus

This corresponds to Walrus commit 79380d8 (26 September 2008).

Signed-off-by: Wincent Colaiuta <win@wincent.com>