usr/src/lib/libbc/libc/gen/common/file_decim.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23
  24 /*
  25  * Copyright (c) 1988 by Sun Microsystems, Inc.
  26  */
  27
  28 #include <ctype.h>
  29 #include <stdio.h>
  30 #ifndef PRE41
  31 #include <locale.h>
  32 #endif
  33 #include "base_conversion.h"
  34
  35 void
  36 file_to_decimal(ppc, nmax, fortran_conventions, pd, pform, pechar, pf, pnread)
  37         char          **ppc;
  38         int             nmax;
  39         int             fortran_conventions;
  40         decimal_record *pd;
  41         enum decimal_string_form *pform;
  42         char          **pechar;
  43         FILE           *pf;
  44         int            *pnread;
  45
  46 {
  47         register char  *cp = *ppc;
  48         register int    current;
  49         register int    nread = 1;      /* Number of characters read so far. */
  50         char           *good = cp - 1;  /* End of known good token. */
  51         char           *cp0 = cp;
  52
  53         current = getc(pf);     /* Initialize buffer. */
  54         *cp = current;
  55
  56 #define ATEOF current
  57 #define CURRENT current
  58 #define NEXT \
  59        if (nread < nmax) \
  60                { cp++ ; current = getc(pf) ; *cp = current ; nread++ ;} \
  61        else \
  62                { current = NULL ; } ;
  63
  64 #include "char_to_decimal.h"
  65 #undef CURRENT
  66 #undef NEXT
  67
  68         if (nread < nmax) {
  69                 while (cp >= *ppc) {    /* Push back as many excess
  70                                          * characters as possible. */
  71                         if (*cp != EOF) {       /* Can't push back EOF. */
  72                                 if (ungetc(*cp, pf) == EOF)
  73                                         break;
  74                         } cp--;
  75                         nread--;
  76                 }
  77         }
  78         cp++;
  79         *cp = 0;                /* Terminating null. */
  80         *pnread = nread;
  81
  82 }