usr/src/lib/libc/port/fp/func_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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "lint.h"
  30 #include <sys/types.h>
  31 #include <ctype.h>
  32 #include <stdio.h>
  33 #include "base_conversion.h"
  34 #include <locale.h>
  35
  36 void
  37 func_to_decimal(char **ppc, int nmax, int fortran_conventions,
  38                 decimal_record *pd, enum decimal_string_form *pform,
  39                 char **pechar, int (*pget)(void), int *pnread,
  40                 int (*punget)(int))
  41 {
  42         char    *cp = *ppc - 1; /* last character seen */
  43         char    *good = cp;     /* last character accepted */
  44         int     current;        /* *cp or EOF */
  45         int     nread = 0;      /* number of characters read so far */
  46
  47 #define NEXT \
  48         if (nread < nmax) { \
  49                 current = (*pget)(); \
  50                 if (current != EOF) { \
  51                         *++cp = (char)current; \
  52                         nread++; \
  53                 } \
  54         } else { \
  55                 current = EOF; \
  56         }
  57
  58         NEXT;
  59
  60 #include "char_to_decimal.h"
  61
  62         if (punget != NULL) {
  63                 /*
  64                  * If we read any characters beyond the end of the accepted
  65                  * token, try to push them back.
  66                  */
  67                 while (cp >= *ppc) {
  68                         if ((*punget)((int)(unsigned char)*cp) == EOF)
  69                                 break;
  70                         cp--;
  71                         nread--;
  72                 }
  73         }
  74
  75         *++cp = '\0';
  76         *pnread = nread;
  77 }