[gfortran] IO library improvements

[Paul Brook <paul at nowt dot org>]

A bucketload of IO library bugfixes and improvements.

Applied to tree-ssa branch.

Paul

libgfortran:
2003-09-07  XiaoQiang Zhang (zhangapache@yahoo.com>

	* libgfortran.h (xtoa, itoa): Parameter modified.
	* io/io.h (namelist_info): Declaration to support namelist I/O
	(st_parameter): Add namelist related component
        (ionml, empty_internal_buffer, st_set_nml_var_int, 
	st_set_nml_var_float, st_set_nml_var_char, st_set_nml_var_complex,
	st_set_nml_var_log): Declaration
        (set_integer, set_integer): Parameter changed
	* io/format.c (free_nodes): Fix annoying bug of lefting "deallocated"
	 fnodes
	(parse_format_list): Fix bug about FMT_SLASH
	* io/list_read.c (push_char): Totally clear old saved_string, zeroize
	newly allocated saved_string
	(next_char): Add detection of End_Of_Line support
	(convert_integer): Now can process 64 bits interger
	(read_real): Bug fixed
	(init_at_eol, find_nml_node, match_namelist_name): Add new functions 
	(match_namelist_name): New implemention
	* io/lock.c (ionml): New global variable
	(library_end): Free memory in ionml
	* io/open.c (st_open): Variable initializtion
	* io/read.c (max_value): 64 bits interger support
	(convert_precsion_real): New procedure to replace "strtod" with more
	 features
	(read_f, read_radix): Input bug fix
	* io/transfer.c: (sf_seen_eor): New static variable
	(read_sf): Zeroize base buffer; fix bugs: single read statement can 
	not get input in mutli line when read from stdin
	(formatted_transfer): Fix bug of FMT_O, FMT_B, FMT_Z for INTEGER type
	 request
	(data_transfer_init): Clear internal buffer for Internel File I/O. 
	Internal File now worked. Detect some error condition for namelist.
	Some minor bug fix
	(next_record_w): Internal file and Namelist I/O support.
	(st_set_nml_var, st_set_nml_var_float, st_set_nml_var_char,
	st_set_nml_var_complex, st_set_nml_var_log): Implemention.
	* io/unit.c (implicit_unit): Deletion
	(get_unit): Now cannot open a unit implicitly.
	* io/unix.c (mmap_alloc): Fix fatal error in calculating the length of
	mapped buffer.
	(mem_alloc_r_at): Internal file I/O support added
	(empty_internal_buffer): New function
	* io/write.c (extract_int): Support 64 bits interger processing
	(output_float): Varibale initialization
	(write_float): Infinite real number detection.
	(write_int): 64 bits integer I/O support
	(write_decimal): New function to output decimal number
	(otoa, btoa): Better implemention and 64 bits interger support
	(namelist_write): New function
	* runtime/error.c (itoa, xtoa): Better implemention and 64 bits 
	interger support

gfortran:
2003-09-07  XiaoQiang Zhang  (zhangapache@yahoo.com>

	* trans-const.c (gfc_conv_mpz_to_tree): Fix bug, parameter for 
	build_int_2 changed from (high, low) to (low, high)
	* trans-io.c (ioparm_namelist_name, ioparm_namelist_name_len,
	ioparm_namelist_read_mode, iocall_set_nml_val_int,
	iocall_set_nml_val_float, iocall_set_nml_val_char,
	iocall_set_nml_val_complex, iocall_set_nml_val_log): New declaration
	(gfc_build_io_library_fndecls): Add variable initialization
	(gfc_new_nml_name_expr, get_new_var_expr): New function
	(build_dt): Add namelist support
	* io.c (value): New variable
	(check_format): Support FMT_H now

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