libgfortran/io/intrinsics.c - gcc - Git at Google

 /* Implementation of the FGET, FGETC, FPUT, FPUTC, FLUSH
    FTELL, TTYNAM and ISATTY intrinsics.
    Copyright (C) 2005, 2007, 2009, 2010, 2011 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;
 }

 extern size_t PREFIX(ftell) (int *);
 export_proto_np(PREFIX(ftell));

 size_t
 PREFIX(ftell) (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 = get_mem (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;
 }
	/* Implementation of the FGET, FGETC, FPUT, FPUTC, FLUSH
	FTELL, TTYNAM and ISATTY intrinsics.
	Copyright (C) 2005, 2007, 2009, 2010, 2011 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;
	}

	extern size_t PREFIX(ftell) (int *);
	export_proto_np(PREFIX(ftell));

	size_t
	PREFIX(ftell) (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 = get_mem (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;
	}