[patch, libfortran] PR 23815: Unformatted data conversion via environment variable

[Thomas Koenig <Thomas dot Koenig at online dot de>]

:ADDPATCH fortran:

This introduces a capability of setting data conversion on
unformatted data files on a per-unit basis via environment variables.
Regression-tested on i686-pc-linux-gnu.

I would love to introduce a test case, but I don't know of any
possiblity of setting environment variables from the dejagnu
framework.

OK for mainline and 4.1 after a few days?

2005-01-15  Thomas Koenig  <Thomas.Koenig@online.de>

	PR libfortran/23815
	gfortran.texi: Document the GFORTRAN_CONVERT_UNIT environment
	variable.
	invoke.texi:  Mention the "Runtime" chapter.

2005-01-15  Thomas Koenig  <Thomas.Koenig@online.de>

	PR libfortran/23815
	runtime/environ.c (init_unformatted):  Add GFORTRAN_CONVERT_UNIT
	environment variable.
	(top level):  Add defines, type and static variables for
	GFORTRAN_CONVERT_UNIT handling.
	(search_unit):  New function.
	(match_word): New function.
	(match_integer): New function.
	(next_token): New function.
	(push_token): New function.
	(mark_single): New function.
	(mark_range): New funciton.
	(do_parse): New function.
	(init_unformatted): New function.
	(get_unformatted_convert): New function.
	io/open.c (st_open): Call get_unformatted_convert to get
	unit default; if CONVERT_NONE is returned, check for
	the presence of a CONVERT specifier and use it.
	io/io.h (top level): Add CONVERT_NONE to unit_convert, to signal
	"nothing has been set".
	(top level): Add prototype for get_unformatted_convert.

Attachment: env-4.diff
Description: Text document