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gcc/libgfortran/io/intrinsics.c
Richard Sandiford e3c063ceda Update copyright years in libgfortran. 
From-SVN: r195167
2013-01-14 18:20:58 +00:00

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