fgetc.c

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/*

  Copyright (C) 2000, 2001, Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2.1 of the GNU Lesser General Public License 
  as published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU Lesser General Public 
  License along with this program; if not, write the Free Software 
  Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, 
  USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/



#pragma ident "@(#) libf/fio/fgetc.c    92.2    08/20/99 13:51:31"


/*
 * Get a character from a logical unit bypassing fortran formatted
 * I/O.  fgetc is called from f77 and f90 programs on mips only.
 * fgetc only applies to unit 5. The clen arg is ignored since only
 * a single character is read.
 *
 * calling sequence:
 *
 *      INTEGER FGETC, IERROR, IUNIT
 *      IERROR = FGETC (IUNIT, CHAR)
 *
 * where:
 *
 *      char    - return a character from logical unit
 *      ierror  .EQ. 0  - fgetc successful.
 *              .LT. 0  - End-of-file, fgetc unsuccessful.
 *              .GT. 0  - system or F77 error code, fgetc unsuccessful.
 *
 * Call fgetc_ from MIPS F77 or from MIPS F90 without a
 *      compatibility module.
 *
 * Call fgetc_f90 from MIPS F90 without a compatibility module.
 *
 * Call fgetcf90_ from MIPS F90 with a compatibility module.
 * Call fgetcf90_8_ from MIPS F90 with a compatibility module.
 * Call fgetcf90_8_4_ from MIPS F90 with a compatibility module.
 * Call fgetcf90_4_8_ from MIPS F90 with a compatibility module.
 *
 */

#include "fio.h"

extern int fgetc_(_f_int *u, char *c, int clen);
extern int __fgetc_f90(_f_int *u, char *c, int clen);
extern _f_int fgetcf90_(_f_int *u, char *c, int clen);
extern _f_int8 fgetcf90_8_(_f_int8 *u, char *c, int clen);
extern _f_int8 fgetcf90_8_4_(_f_int4 *u, char *c, int clen);
extern _f_int4 fgetcf90_4_8_(_f_int8 *u, char *c, int clen);
extern int getc_(char *c, int clen);
extern _f_int4 getcf90_(char *c, int clen);
extern _f_int8 getcf90_8_(char *c, int clen);

int 
__fgetc_f90(_f_int *u, char *c, int clen)
{
        return fgetcf90_(u, c, clen);
}

_f_int 
fgetcf90_(_f_int *u, char *c, int clen)
{
        _f_int          res;
        long            buf;
        long            status;
        struct fiostate cfs;            /* fiosp */
        unit            *cup;           /* Unit table pointer   */
        unum_t          unum;

        unum    = *u;
        res     = 0;

        /* lock the unit */
        STMT_BEGIN( unum, 0, T_RSF, NULL,  &cfs, cup);

        if (unum < 0 || !cup)
                return((errno=FEIVUNIT));
        
        if (_frch(cup, &buf, 1, PARTIAL, &status) == -1)
                res     = errno;

        *c      = (char)buf;

        /* unlock the unit */
        STMT_END( cup, TF_READ, NULL,  &cfs);

        return(res);
}

_f_int8
fgetcf90_8_(_f_int8 *u, char *c, int clen)
{
        _f_int8         res;
        long            status;
        struct fiostate cfs;            /* fiosp */
        unit            *cup;           /* Unit table pointer   */
        unum_t          unum;

        unum    = *u;
        res     = 0;

        /* lock the unit */
        STMT_BEGIN( unum, 0, T_RSF, NULL,  &cfs, cup);

        if (unum < 0 || !cup)
                return((errno=FEIVUNIT));

        if (_frch(cup, (long *)c, 1, PARTIAL, &status) == -1)
                res     = errno;

        /* unlock the unit */
        STMT_END( cup, TF_READ, NULL,  &cfs);

        return(res);
}

_f_int8
fgetcf90_8_4_(_f_int4 *u, char *c, int clen)
{
        return (_f_int8)fgetcf90_(u, c, clen);
}

_f_int4
fgetcf90_4_8_(_f_int8 *u, char *c, int clen)
{
        _f_int8 uunit;
        uunit = *u;
        return (_f_int4)fgetcf90_8_(&uunit, c, clen);
}

/*
 * getc - get a character from the standard input unit 5 on mips.
 *
 * calling sequence:
 *
 *      INTEGER getc
 *      ierror = getc (char)
 *
 * where:
 *
 *      char    = character read from standard input, usually a terminal
 *      ierror  = 0 if successful.
 *              = -1 if end-of-file read.
 *              > 0 if system error code returned.
 *
 * Call getc_ from MIPS F77 or from MIPS F90 without a
 *      compatibility module.  Note thatit calls fgetc with unit 5.
 *
 * Call getcf90_ from MIPS F90 with a compatibility module.
 * Call getcf90_8_ from MIPS F90 with a compatibility module.
 *
 */

int
getc_(char *c, int clen)
{
        int stdin_unit  = 5;
        return fgetc_(&stdin_unit, c, clen);
}

_f_int4
getcf90_(char *c, int clen)
{
        _f_int4         res;
        long            status;
        struct fiostate cfs;            /* fiosp */
        unit            *cup;           /* Unit table pointer   */
        unum_t          unum = 5;

        res     = 0;

        /* lock the unit */
        STMT_BEGIN( unum, 0, T_RSF, NULL,  &cfs, cup);

        if (!cup)
                return((errno=FEIVUNIT));

        if (_frch(cup, (long *)c, 1, PARTIAL, &status) == -1)
                res     = errno;

        /* unlock the unit */
        STMT_END( cup, TF_READ, NULL,  &cfs);

        return(res);
}

_f_int8
getcf90_8_(char *c, int clen)
{
        _f_int8         res;
        long            status;
        struct fiostate cfs;            /* fiosp */
        unit            *cup;           /* Unit table pointer   */
        unum_t          unum = 5;

        res     = 0;

        /* lock the unit */
        STMT_BEGIN( unum, 0, T_RSF, NULL,  &cfs, cup);

        if (!cup)
                return((errno=FEIVUNIT));

        if (_frch(cup, (long *)c, 1, PARTIAL, &status) == -1)
                res     = errno;

        /* unlock the unit */
        STMT_END( cup, TF_READ, NULL,  &cfs);

        return(res);
}