contrib/libarchive-1.3.1/libarchive/archive_string.h

   1 /*-
   2  * Copyright (c) 2003-2004 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libarchive/archive_string.h,v 1.6 2005/01/16 22:13:51 kientzle Exp $
  27  *
  28  */
  29
  30 #ifndef ARCHIVE_STRING_H_INCLUDED
  31 #define ARCHIVE_STRING_H_INCLUDED
  32
  33 #include <stdarg.h>
  34 #include <string.h>
  35
  36 /*
  37  * Basic resizable/reusable string support a la Java's "StringBuffer."
  38  *
  39  * Unlike sbuf(9), the buffers here are fully reusable and track the
  40  * length throughout.
  41  *
  42  * Note that all visible symbols here begin with "__archive" as they
  43  * are internal symbols not intended for anyone outside of this library
  44  * to see or use.
  45  */
  46
  47 struct archive_string {
  48         char    *s;  /* Pointer to the storage */
  49         size_t   length; /* Length of 's' */
  50         size_t   buffer_length; /* Length of malloc-ed storage */
  51 };
  52
  53 /* Initialize an archive_string object on the stack or elsewhere. */
  54 #define archive_string_init(a)  \
  55         do { (a)->s = NULL; (a)->length = 0; (a)->buffer_length = 0; } while(0)
  56
  57 /* Append a C char to an archive_string, resizing as necessary. */
  58 struct archive_string *
  59 __archive_strappend_char(struct archive_string *, char);
  60 #define archive_strappend_char __archive_strappend_char
  61
  62 /* Append a char to an archive_string using UTF8. */
  63 struct archive_string *
  64 __archive_strappend_char_UTF8(struct archive_string *, int);
  65 #define archive_strappend_char_UTF8 __archive_strappend_char_UTF8
  66
  67 /* Append an integer in the specified base (2 <= base <= 16). */
  68 struct archive_string *
  69 __archive_strappend_int(struct archive_string *as, int d, int base);
  70 #define archive_strappend_int __archive_strappend_int
  71
  72 /* Basic append operation. */
  73 struct archive_string *
  74 __archive_string_append(struct archive_string *as, const char *p, size_t s);
  75
  76 /* Ensure that the underlying buffer is at least as large as the request. */
  77 struct archive_string *
  78 __archive_string_ensure(struct archive_string *, size_t);
  79 #define archive_string_ensure __archive_string_ensure
  80
  81 /* Append C string, which may lack trailing \0. */
  82 struct archive_string *
  83 __archive_strncat(struct archive_string *, const char *, size_t);
  84 #define archive_strncat  __archive_strncat
  85
  86 /* Append a C string to an archive_string, resizing as necessary. */
  87 #define archive_strcat(as,p) __archive_string_append((as),(p),strlen(p))
  88
  89 /* Copy a C string to an archive_string, resizing as necessary. */
  90 #define archive_strcpy(as,p) \
  91         ((as)->length = 0, __archive_string_append((as), (p), strlen(p)))
  92
  93 /* Copy a C string to an archive_string with limit, resizing as necessary. */
  94 #define archive_strncpy(as,p,l) \
  95         ((as)->length=0, archive_strncat((as), (p), (l)))
  96
  97 /* Return length of string. */
  98 #define archive_strlen(a) ((a)->length)
  99
 100 /* Set string length to zero. */
 101 #define archive_string_empty(a) ((a)->length = 0)
 102
 103 /* Release any allocated storage resources. */
 104 void    __archive_string_free(struct archive_string *);
 105 #define archive_string_free  __archive_string_free
 106
 107 /* Like 'vsprintf', but resizes the underlying string as necessary. */
 108 void    __archive_string_vsprintf(struct archive_string *, const char *,
 109             va_list);
 110 #define archive_string_vsprintf __archive_string_vsprintf
 111
 112 #endif