2710e4d1ef
What it is:
A library for reading and writing various streaming archive
formats, especially tar and cpio. Being a library, it should
be easy to incorporate into pkg_* tools, sysinstall, and any
other place that needs to read or write such archives.
Features:
* Full automatic detection of both compression and archive format.
* Extensible internal architecture to make it easy to add new formats.
* Support for "pax interchange format," a new POSIX-standard tar format
that eliminates essentially all of the restrictions of historic formats.
* BSD license
Thanks to: jkh for pushing me to start this work, gordon for
encouraging me to commit it, bde for answering endless style
questions, and many others for feedback and encouragement.
Status: Pretty good overall, though there are still a few rough edges and
the library could always use more testing. Feedback eagerly solicited.
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*-
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* Copyright (c) 2003-2004 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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* in this position and unchanged.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Basic resizable string support, to simplify manipulating arbitrary-sized
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* strings while minimizing heap activity.
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*/
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#ifdef DMALLOC
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#include <dmalloc.h>
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#endif
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include "archive_string.h"
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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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{
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__archive_string_ensure(as, as->length + s + 1);
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memcpy(as->s + as->length, p, s);
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as->s[as->length + s] = 0;
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as->length += s;
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return (as);
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}
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void
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__archive_string_free(struct archive_string *as)
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{
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as->length = 0;
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as->buffer_length = 0;
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if (as->s != NULL)
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free(as->s);
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}
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struct archive_string *
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__archive_string_ensure(struct archive_string *as, size_t s)
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{
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if (as->s && (s <= as->buffer_length))
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return (as);
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if (as->buffer_length < 32)
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as->buffer_length = 32;
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while (as->buffer_length < s)
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as->buffer_length *= 2;
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as->s = realloc(as->s, as->buffer_length);
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if (as->s == NULL)
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errx(1,"Out of memory");
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return (as);
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}
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struct archive_string *
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__archive_strncat(struct archive_string *as, const char *p, size_t n)
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{
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size_t s;
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const char *pp;
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/* Like strlen(p), except won't examine positions beyond p[n]. */
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s = 0;
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pp = p;
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while (*pp && s < n) {
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pp++;
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s++;
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}
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return (__archive_string_append(as, p, s));
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}
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struct archive_string *
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__archive_strappend_char(struct archive_string *as, char c)
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{
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return (__archive_string_append(as, &c, 1));
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}
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#if 0
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/* Append Unicode character to string using UTF8 encoding */
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struct archive_string *
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__archive_strappend_char_UTF8(struct archive_string *as, int c)
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{
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char buff[6];
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if (c <= 0x7f) {
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buff[0] = c;
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return (__archive_string_append(as, buff, 1));
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} else if (c <= 0x7ff) {
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buff[0] = 0xc0 | (c >> 6);
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buff[1] = 0x80 | (c & 0x3f);
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return (__archive_string_append(as, buff, 2));
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} else if (c <= 0xffff) {
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buff[0] = 0xe0 | (c >> 12);
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buff[1] = 0x80 | ((c >> 6) & 0x3f);
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buff[2] = 0x80 | (c & 0x3f);
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return (__archive_string_append(as, buff, 3));
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} else if (c <= 0x1fffff) {
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buff[0] = 0xf0 | (c >> 18);
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buff[1] = 0x80 | ((c >> 12) & 0x3f);
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buff[2] = 0x80 | ((c >> 6) & 0x3f);
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buff[3] = 0x80 | (c & 0x3f);
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return (__archive_string_append(as, buff, 4));
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} else if (c <= 0x3ffffff) {
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buff[0] = 0xf8 | (c >> 24);
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buff[1] = 0x80 | ((c >> 18) & 0x3f);
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buff[2] = 0x80 | ((c >> 12) & 0x3f);
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buff[3] = 0x80 | ((c >> 6) & 0x3f);
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buff[4] = 0x80 | (c & 0x3f);
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return (__archive_string_append(as, buff, 5));
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} else if (c <= 0x7fffffff) {
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buff[0] = 0xfc | (c >> 30);
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buff[1] = 0x80 | ((c >> 24) & 0x3f);
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buff[1] = 0x80 | ((c >> 18) & 0x3f);
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buff[2] = 0x80 | ((c >> 12) & 0x3f);
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buff[3] = 0x80 | ((c >> 6) & 0x3f);
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buff[4] = 0x80 | (c & 0x3f);
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return (__archive_string_append(as, buff, 6));
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} else {
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/* TODO: Handle this error?? */
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return (as);
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}
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}
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#endif
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