In order to handle large characters when doing formatted I/O, use
size_t and ptrdiff_t for lengths. Compared to the previous patch,
based on discussions on IRC use size_t for sizes that don't need to be
negative rather than ptrdiff_t everywhere.
Regtested on x86_64-pc-linux-gnu, approved as part of the PR 78534
approval, committed to trunk.
libgfortran/ChangeLog:
2018-01-07 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/78534
PR fortran/83704
* io/fbuf.c (fbuf_init): Use size_t instead of int for length.
(fbuf_debug): Convert debug output to unsigned long.
(fbuf_reset): Use ptrdiff_t for return value.
(fbuf_alloc): Use size_t for length argument.
(fbuf_flush): Handle large buffers.
(fbuf_flush_list): Likewise.
(fbuf_seek): Use ptrdiff_t for offset and return value.
(fbuf_read): Use size_t for length argument.
(fbuf_getc_refill): Use size_t to match fbuf_read.
* io/fbuf.h (struct fbuf): Use size_t for lengths.
(fbuf_init): Use size_t instead of int for length.
(fbuf_reset): Use ptrdiff_t for return value.
(fbuf_alloc): Use size_t for length argument.
(fbuf_seek): Use ptrdiff_t for offset and return value.
(fbuf_read): Use size_t for length argument.
* io/io.h (read_block_form): Likewise.
(read_block_form4): Likewise.
(write_block): Likewise.
(read_a): Likewise.
(read_a_char4): Likewise.
(read_x): Likewise.
(write_a): Likewise.
(write_a_char4): Likewise.
* io/list_read.c (list_formatted_read_scalar): Use size_t to
handle large buffers.
* io/read.c (read_l): Likewise.
(read_utf8): Likewise.
(read_utf8_char1): Likewise.
(read_default_char1): Likewise.
(read_utf8_char4): Likewise.
(read_default_char4): Likewise.
(read_a): Likewise.
(read_a_char4): Likewise.
(eat_leading_spaces): Likewise.
(next_char): Likewise.
(read_decimal): Likewise.
(read_radix): Likewise.
(read_f): Likewise.
(read_x): Likewise.
* io/transfer.c (read_sf_internal): Likewise.
(read_sf): Likewise.
(read_block_form): Likewise.
(read_block_form4): Likewise.
(write_block): Likewise.
(formatted_transfer_scalar_write): Likewise.
(next_record_w): Likewise.
* io/unix.c (mem_alloc_r): Likewise.
(mem_alloc_r4): Likewise.
(mem_alloc_w): Likewise.
(mem_alloc_w4): Likewise.
(mem_read): Likewise.
(mem_read4): Likewise.
(mem_write): Likewise.
(mem_write4): Likewise.
(open_internal): Likewise.
(open_internal4): Likewise.
* io/unix.h (open_internal): Likewise.
(open_internal4): Likewise.
(mem_alloc_w): Likewise.
(mem_alloc_r): Likewise.
(mem_alloc_w4): Likewise.
(mem_alloc_r4): Likewise.
* io/write.c (write_check_cc): Likewise.
(write_cc): Likewise.
(write_a): Likewise.
(write_a_char4): Likewise.
From-SVN: r256322
