xref: /illumos-gate/usr/src/lib/libc/port/fp/func_decim.c (revision 4de2612967d06c4fdbf524a62556a1e8118a006f)
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 /*
23  * Copyright 2004 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 #pragma weak func_to_decimal = _func_to_decimal
30 
31 #include "synonyms.h"
32 #include <sys/types.h>
33 #include <ctype.h>
34 #include <stdio.h>
35 #include "base_conversion.h"
36 #include <locale.h>
37 
38 void
39 func_to_decimal(char **ppc, int nmax, int fortran_conventions,
40 		decimal_record *pd, enum decimal_string_form *pform,
41 		char **pechar, int (*pget)(void), int *pnread,
42 		int (*punget)(int))
43 {
44 	char	*cp = *ppc - 1;	/* last character seen */
45 	char	*good = cp;	/* last character accepted */
46 	int	current;	/* *cp or EOF */
47 	int	nread = 0;	/* number of characters read so far */
48 
49 #define	NEXT \
50 	if (nread < nmax) { \
51 		current = (*pget)(); \
52 		if (current != EOF) { \
53 			*++cp = (char)current; \
54 			nread++; \
55 		} \
56 	} else { \
57 		current = EOF; \
58 	}
59 
60 	NEXT;
61 
62 #include "char_to_decimal.h"
63 
64 	if (punget != NULL) {
65 		/*
66 		 * If we read any characters beyond the end of the accepted
67 		 * token, try to push them back.
68 		 */
69 		while (cp >= *ppc) {
70 			if ((*punget)((int)(unsigned char)*cp) == EOF)
71 				break;
72 			cp--;
73 			nread--;
74 		}
75 	}
76 
77 	*++cp = '\0';
78 	*pnread = nread;
79 }
80