usr/src/lib/libmail/inc/s_string.h

   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 /* extensible strings */
  34
  35 #ifndef _S_STRING_H
  36 #define _S_STRING_H
  37
  38 #include <string.h>
  39
  40 typedef struct string {
  41         char *base;     /* base of string */
  42         char *end;      /* end of allocated space+1 */
  43         char *ptr;      /* ptr into string */
  44 } string;
  45
  46 /*
  47  * LINT:  expect lint warnings from the following macros
  48  * Some macros have an integer at the end, which has null effect according
  49  * to lint, but causes the last expression to be evaluated as an int (didn't
  50  * change this).
  51  */
  52 #define s_clone(s)      s_copy((s)->ptr)
  53 #define s_curlen(s)     ((s)->ptr - (s)->base)
  54 #define s_dup(s)        s_copy((s)->base)
  55 #define s_getc(s)       (*((s)->ptr++))
  56 #define s_peek(s)       (*((s)->ptr))
  57 #define s_putc(s, c)    (((s)->ptr < (s)->end) ? \
  58         (*((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)
  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) ? \
  64         (*(s)->ptr = 0) : (s_grow((s), 0), (s)->ptr--, 0))
  65 #define s_to_c(s)       ((s)->base)
  66 #define s_ptr_to_c(s)   ((s)->ptr)
  67
  68 #ifdef __STDC__
  69 extern string *s_append(string *to, char *from);
  70 extern string *s_array(char *, size_t len);
  71 extern string *s_copy(char *);
  72 extern void s_free(string *);
  73 extern int s_grow(string *sp, int c);
  74 extern string *s_new(void);
  75 extern string *s_parse(string *from, string *to);
  76 extern char *s_read_line(FILE *fp, string *to);
  77 extern size_t s_read_to_eof(FILE *fp, string *to);
  78 extern string *s_seq_read(FILE *fp, string *to, int lineortoken);
  79 extern void s_skipwhite(string *from);
  80 extern string *s_tok(string *, char *);
  81 extern void s_tolower(string *);
  82 #else
  83 extern string *s_append();
  84 extern string *s_array();
  85 extern string *s_copy();
  86 extern void s_free();
  87 extern int s_grow();
  88 extern string *s_new();
  89 extern string *s_parse();
  90 extern char *s_read_line();
  91 extern size_t s_read_to_eof();
  92 extern string *s_seq_read();
  93 extern void s_skipwhite();
  94 extern string *s_tok();
  95 extern void s_tolower();
  96 #endif
  97
  98 /* controlling the action of s_seq_read */
  99 #define TOKEN 0         /* read the next whitespace delimited token */
 100 #define LINE 1          /* read the next logical input line */
 101 #define s_getline(a, b) s_seq_read(a, b, LINE)
 102 #define s_gettoken(a, b) s_seq_read(a, b, TOKEN)
 103
 104 #endif /* _S_STRING_H */