f8c35626c4
r751: Change __archive_strncat() to use a void * source, which reduces the amount of casting needed to use this with "char", "signed char" and "unsigned char". r752: Use additions instead of multiplications when growing buffer; faster and less chance of overflow.
145 lines
5.4 KiB
C
145 lines
5.4 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef ARCHIVE_STRING_H_INCLUDED
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#define ARCHIVE_STRING_H_INCLUDED
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#include <stdarg.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h> /* required for wchar_t on some systems */
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_WCHAR_H
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#include <wchar.h>
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#endif
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/*
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* Basic resizable/reusable string support a la Java's "StringBuffer."
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*
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* Unlike sbuf(9), the buffers here are fully reusable and track the
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* length throughout.
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*
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* Note that all visible symbols here begin with "__archive" as they
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* are internal symbols not intended for anyone outside of this library
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* to see or use.
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*/
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struct archive_string {
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char *s; /* Pointer to the storage */
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size_t length; /* Length of 's' */
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size_t buffer_length; /* Length of malloc-ed storage */
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};
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/* Initialize an archive_string object on the stack or elsewhere. */
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#define archive_string_init(a) \
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do { (a)->s = NULL; (a)->length = 0; (a)->buffer_length = 0; } while(0)
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/* Append a C char to an archive_string, resizing as necessary. */
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struct archive_string *
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__archive_strappend_char(struct archive_string *, char);
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#define archive_strappend_char __archive_strappend_char
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/* Convert a wide-char string to UTF-8 and append the result. */
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struct archive_string *
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__archive_strappend_w_utf8(struct archive_string *, const wchar_t *);
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#define archive_strappend_w_utf8 __archive_strappend_w_utf8
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/* Convert a wide-char string to current locale and append the result. */
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/* Returns NULL if conversion fails. */
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struct archive_string *
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__archive_strappend_w_mbs(struct archive_string *, const wchar_t *);
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#define archive_strappend_w_mbs __archive_strappend_w_mbs
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/* Basic append operation. */
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struct archive_string *
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__archive_string_append(struct archive_string *as, const char *p, size_t s);
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/* Copy one archive_string to another */
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void
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__archive_string_copy(struct archive_string *dest, struct archive_string *src);
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#define archive_string_copy(dest, src) \
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__archive_string_copy(dest, src)
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/* Concatenate one archive_string to another */
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void
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__archive_string_concat(struct archive_string *dest, struct archive_string *src);
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#define archive_string_concat(dest, src) \
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__archive_string_concat(dest, src)
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/* Ensure that the underlying buffer is at least as large as the request. */
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struct archive_string *
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__archive_string_ensure(struct archive_string *, size_t);
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#define archive_string_ensure __archive_string_ensure
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/* Append C string, which may lack trailing \0. */
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/* The source is declared void * here because this gets used with
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* "signed char *", "unsigned char *" and "char *" arguments.
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* Declaring it "char *" as with some of the other functions just
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* leads to a lot of extra casts. */
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struct archive_string *
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__archive_strncat(struct archive_string *, const void *, size_t);
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#define archive_strncat __archive_strncat
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/* Append a C string to an archive_string, resizing as necessary. */
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#define archive_strcat(as,p) __archive_string_append((as),(p),strlen(p))
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/* Copy a C string to an archive_string, resizing as necessary. */
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#define archive_strcpy(as,p) \
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((as)->length = 0, __archive_string_append((as), (p), p == NULL ? 0 : strlen(p)))
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/* Copy a C string to an archive_string with limit, resizing as necessary. */
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#define archive_strncpy(as,p,l) \
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((as)->length=0, archive_strncat((as), (p), (l)))
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/* Return length of string. */
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#define archive_strlen(a) ((a)->length)
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/* Set string length to zero. */
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#define archive_string_empty(a) ((a)->length = 0)
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/* Release any allocated storage resources. */
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void __archive_string_free(struct archive_string *);
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#define archive_string_free __archive_string_free
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/* Like 'vsprintf', but resizes the underlying string as necessary. */
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void __archive_string_vsprintf(struct archive_string *, const char *,
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va_list);
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#define archive_string_vsprintf __archive_string_vsprintf
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void __archive_string_sprintf(struct archive_string *, const char *, ...);
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#define archive_string_sprintf __archive_string_sprintf
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/* Allocates a fresh buffer and converts as (assumed to be UTF-8) into it.
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* Returns NULL if conversion failed in any way. */
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wchar_t *__archive_string_utf8_w(struct archive_string *as);
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#endif
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