xref: /illumos-gate/usr/src/lib/libc/port/fp/func_decim.c (revision 8b80e8cb6855118d46f605e91b5ed4ce83417395)
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 }
78