417 lines
8.3 KiB
C
417 lines
8.3 KiB
C
/* Implementation of the FGET, FGETC, FPUT, FPUTC, FLUSH
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FTELL, TTYNAM and ISATTY intrinsics.
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Copyright (C) 2005-2013 Free Software Foundation, Inc.
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "io.h"
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#include "fbuf.h"
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#include "unix.h"
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#include <stdlib.h>
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#include <string.h>
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static const int five = 5;
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static const int six = 6;
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extern int PREFIX(fgetc) (const int *, char *, gfc_charlen_type);
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export_proto_np(PREFIX(fgetc));
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int
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PREFIX(fgetc) (const int * unit, char * c, gfc_charlen_type c_len)
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{
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int ret;
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gfc_unit * u = find_unit (*unit);
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if (u == NULL)
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return -1;
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fbuf_reset (u);
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if (u->mode == WRITING)
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{
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sflush (u->s);
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u->mode = READING;
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}
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memset (c, ' ', c_len);
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ret = sread (u->s, c, 1);
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unlock_unit (u);
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if (ret < 0)
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return ret;
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if (ret != 1)
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return -1;
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else
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return 0;
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}
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#define FGETC_SUB(kind) \
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extern void fgetc_i ## kind ## _sub \
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(const int *, char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
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export_proto(fgetc_i ## kind ## _sub); \
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void fgetc_i ## kind ## _sub \
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(const int * unit, char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
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{ if (st != NULL) \
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*st = PREFIX(fgetc) (unit, c, c_len); \
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else \
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PREFIX(fgetc) (unit, c, c_len); }
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FGETC_SUB(1)
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FGETC_SUB(2)
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FGETC_SUB(4)
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FGETC_SUB(8)
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extern int PREFIX(fget) (char *, gfc_charlen_type);
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export_proto_np(PREFIX(fget));
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int
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PREFIX(fget) (char * c, gfc_charlen_type c_len)
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{
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return PREFIX(fgetc) (&five, c, c_len);
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}
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#define FGET_SUB(kind) \
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extern void fget_i ## kind ## _sub \
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(char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
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export_proto(fget_i ## kind ## _sub); \
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void fget_i ## kind ## _sub \
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(char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
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{ if (st != NULL) \
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*st = PREFIX(fgetc) (&five, c, c_len); \
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else \
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PREFIX(fgetc) (&five, c, c_len); }
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FGET_SUB(1)
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FGET_SUB(2)
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FGET_SUB(4)
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FGET_SUB(8)
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extern int PREFIX(fputc) (const int *, char *, gfc_charlen_type);
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export_proto_np(PREFIX(fputc));
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int
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PREFIX(fputc) (const int * unit, char * c,
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gfc_charlen_type c_len __attribute__((unused)))
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{
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ssize_t s;
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gfc_unit * u = find_unit (*unit);
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if (u == NULL)
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return -1;
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fbuf_reset (u);
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if (u->mode == READING)
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{
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sflush (u->s);
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u->mode = WRITING;
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}
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s = swrite (u->s, c, 1);
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unlock_unit (u);
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if (s < 0)
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return -1;
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return 0;
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}
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#define FPUTC_SUB(kind) \
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extern void fputc_i ## kind ## _sub \
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(const int *, char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
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export_proto(fputc_i ## kind ## _sub); \
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void fputc_i ## kind ## _sub \
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(const int * unit, char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
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{ if (st != NULL) \
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*st = PREFIX(fputc) (unit, c, c_len); \
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else \
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PREFIX(fputc) (unit, c, c_len); }
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FPUTC_SUB(1)
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FPUTC_SUB(2)
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FPUTC_SUB(4)
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FPUTC_SUB(8)
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extern int PREFIX(fput) (char *, gfc_charlen_type);
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export_proto_np(PREFIX(fput));
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int
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PREFIX(fput) (char * c, gfc_charlen_type c_len)
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{
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return PREFIX(fputc) (&six, c, c_len);
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}
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#define FPUT_SUB(kind) \
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extern void fput_i ## kind ## _sub \
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(char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
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export_proto(fput_i ## kind ## _sub); \
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void fput_i ## kind ## _sub \
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(char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
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{ if (st != NULL) \
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*st = PREFIX(fputc) (&six, c, c_len); \
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else \
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PREFIX(fputc) (&six, c, c_len); }
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FPUT_SUB(1)
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FPUT_SUB(2)
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FPUT_SUB(4)
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FPUT_SUB(8)
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/* SUBROUTINE FLUSH(UNIT)
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INTEGER, INTENT(IN), OPTIONAL :: UNIT */
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extern void flush_i4 (GFC_INTEGER_4 *);
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export_proto(flush_i4);
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void
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flush_i4 (GFC_INTEGER_4 *unit)
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{
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gfc_unit *us;
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/* flush all streams */
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if (unit == NULL)
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flush_all_units ();
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else
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{
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us = find_unit (*unit);
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if (us != NULL)
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{
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sflush (us->s);
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unlock_unit (us);
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}
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}
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}
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extern void flush_i8 (GFC_INTEGER_8 *);
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export_proto(flush_i8);
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void
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flush_i8 (GFC_INTEGER_8 *unit)
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{
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gfc_unit *us;
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/* flush all streams */
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if (unit == NULL)
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flush_all_units ();
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else
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{
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us = find_unit (*unit);
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if (us != NULL)
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{
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sflush (us->s);
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unlock_unit (us);
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}
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}
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}
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/* FSEEK intrinsic */
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extern void fseek_sub (int *, GFC_IO_INT *, int *, int *);
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export_proto(fseek_sub);
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void
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fseek_sub (int * unit, GFC_IO_INT * offset, int * whence, int * status)
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{
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gfc_unit * u = find_unit (*unit);
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ssize_t result = -1;
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if (u != NULL)
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{
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result = sseek(u->s, *offset, *whence);
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unlock_unit (u);
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}
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if (status)
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*status = (result < 0 ? -1 : 0);
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}
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/* FTELL intrinsic */
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static gfc_offset
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gf_ftell (int unit)
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{
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gfc_unit * u = find_unit (unit);
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if (u == NULL)
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return -1;
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int pos = fbuf_reset (u);
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if (pos != 0)
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sseek (u->s, pos, SEEK_CUR);
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gfc_offset ret = stell (u->s);
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unlock_unit (u);
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return ret;
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}
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/* Here is the ftell function with an incorrect return type; retained
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due to ABI compatibility. */
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extern size_t PREFIX(ftell) (int *);
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export_proto_np(PREFIX(ftell));
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size_t
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PREFIX(ftell) (int * unit)
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{
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return gf_ftell (*unit);
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}
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/* Here is the ftell function with the correct return type, ensuring
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that large files can be supported as long as the target supports
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large integers; as of 4.8 the FTELL intrinsic function will call
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this one instead of the old ftell above. */
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extern GFC_IO_INT PREFIX(ftell2) (int *);
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export_proto_np(PREFIX(ftell2));
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GFC_IO_INT
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PREFIX(ftell2) (int * unit)
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{
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return gf_ftell (*unit);
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}
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#define FTELL_SUB(kind) \
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extern void ftell_i ## kind ## _sub (int *, GFC_INTEGER_ ## kind *); \
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export_proto(ftell_i ## kind ## _sub); \
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void \
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ftell_i ## kind ## _sub (int * unit, GFC_INTEGER_ ## kind * offset) \
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{ \
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*offset = gf_ftell (*unit); \
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}
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FTELL_SUB(1)
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FTELL_SUB(2)
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FTELL_SUB(4)
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FTELL_SUB(8)
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/* LOGICAL FUNCTION ISATTY(UNIT)
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INTEGER, INTENT(IN) :: UNIT */
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extern GFC_LOGICAL_4 isatty_l4 (int *);
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export_proto(isatty_l4);
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GFC_LOGICAL_4
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isatty_l4 (int *unit)
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{
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gfc_unit *u;
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GFC_LOGICAL_4 ret = 0;
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u = find_unit (*unit);
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if (u != NULL)
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{
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ret = (GFC_LOGICAL_4) stream_isatty (u->s);
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unlock_unit (u);
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}
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return ret;
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}
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extern GFC_LOGICAL_8 isatty_l8 (int *);
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export_proto(isatty_l8);
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GFC_LOGICAL_8
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isatty_l8 (int *unit)
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{
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gfc_unit *u;
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GFC_LOGICAL_8 ret = 0;
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u = find_unit (*unit);
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if (u != NULL)
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{
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ret = (GFC_LOGICAL_8) stream_isatty (u->s);
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unlock_unit (u);
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}
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return ret;
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}
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/* SUBROUTINE TTYNAM(UNIT,NAME)
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INTEGER,SCALAR,INTENT(IN) :: UNIT
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CHARACTER,SCALAR,INTENT(OUT) :: NAME */
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extern void ttynam_sub (int *, char *, gfc_charlen_type);
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export_proto(ttynam_sub);
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void
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ttynam_sub (int *unit, char * name, gfc_charlen_type name_len)
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{
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gfc_unit *u;
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int nlen;
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int err = 1;
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u = find_unit (*unit);
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if (u != NULL)
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{
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err = stream_ttyname (u->s, name, name_len);
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if (err == 0)
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{
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nlen = strlen (name);
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memset (&name[nlen], ' ', name_len - nlen);
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}
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unlock_unit (u);
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}
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if (err != 0)
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memset (name, ' ', name_len);
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}
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extern void ttynam (char **, gfc_charlen_type *, int);
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export_proto(ttynam);
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void
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ttynam (char ** name, gfc_charlen_type * name_len, int unit)
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{
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gfc_unit *u;
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u = find_unit (unit);
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if (u != NULL)
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{
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*name = xmalloc (TTY_NAME_MAX);
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int err = stream_ttyname (u->s, *name, TTY_NAME_MAX);
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if (err == 0)
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{
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*name_len = strlen (*name);
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unlock_unit (u);
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return;
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}
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free (*name);
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unlock_unit (u);
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}
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*name_len = 0;
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*name = NULL;
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}
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