xref: /titanic_41/usr/src/lib/libmail/inc/s_string.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*
27  * Copyright (c) 1999, by Sun Microsystems, Inc.
28  * All rights reserved.
29  */
30 
31 /* This is a private header file.				*/
32 
33 #pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 1.4	*/
34 /* extensible strings */
35 
36 #ifndef _S_STRING_H
37 #define _S_STRING_H
38 
39 #include <string.h>
40 
41 typedef struct string {
42 	char *base;	/* base of string */
43 	char *end;	/* end of allocated space+1 */
44 	char *ptr;	/* ptr into string */
45 } string;
46 
47 /*
48  * LINT:  expect lint warnings from the following macros
49  * Some macros have an integer at the end, which has null effect according
50  * to lint, but causes the last expression to be evaluated as an int (didn't
51  * change this).
52  */
53 #define s_clone(s)	s_copy((s)->ptr)
54 #define s_curlen(s)	((s)->ptr - (s)->base)
55 #define s_dup(s)	s_copy((s)->base)
56 #define s_getc(s)	(*((s)->ptr++))
57 #define s_peek(s)	(*((s)->ptr))
58 #define s_putc(s,c)     (((s)->ptr < (s)->end) ? (*((s)->ptr)++ = (char)(c)) : s_grow((s),(c)))
59 #define s_reset(s)	((s) ? (*((s)->ptr = (s)->base) = '\0' , (s)) : s_new())
60 #define s_restart(s)	((s)->ptr = (s)->base , (s))
61 #define s_skipc(s)	((s)->ptr++)
62 #define s_space(s)	((s)->end - (s)->base)
63 #define s_terminate(s)  (((s)->ptr < (s)->end) ? (*(s)->ptr = 0) : (s_grow((s),0), (s)->ptr--, 0))
64 #define s_to_c(s)	((s)->base)
65 #define s_ptr_to_c(s)	((s)->ptr)
66 
67 #ifdef __STDC__
68 extern string *s_append(string *to, char *from);
69 extern string *s_array(char *, size_t len);
70 extern string *s_copy(char *);
71 extern void s_free(string*);
72 extern int s_grow(string *sp, int c);
73 extern string *s_new(void);
74 extern string *s_parse(string *from, string *to);
75 extern char *s_read_line(FILE *fp, string *to);
76 extern size_t s_read_to_eof(FILE *fp, string *to);
77 extern string *s_seq_read(FILE *fp, string *to, int lineortoken);
78 extern void s_skipwhite(string *from);
79 extern string *s_tok(string*, char*);
80 extern void s_tolower(string*);
81 #else
82 extern string *s_append();
83 extern string *s_array();
84 extern string *s_copy();
85 extern void s_free();
86 extern int s_grow();
87 extern string *s_new();
88 extern string *s_parse();
89 extern char *s_read_line();
90 extern size_t s_read_to_eof();
91 extern string *s_seq_read();
92 extern void s_skipwhite();
93 extern string *s_tok();
94 extern void s_tolower();
95 #endif
96 
97 /* controlling the action of s_seq_read */
98 #define TOKEN 0		/* read the next whitespace delimited token */
99 #define LINE 1		/* read the next logical input line */
100 #define s_getline(a,b) s_seq_read(a,b,LINE)
101 #define s_gettoken(a,b) s_seq_read(a,b,TOKEN)
102 
103 #endif /* _S_STRING_H */
104