diff options
Diffstat (limited to 'lib/libarchive/archive_string.c')
| -rw-r--r-- | lib/libarchive/archive_string.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/lib/libarchive/archive_string.c b/lib/libarchive/archive_string.c new file mode 100644 index 0000000..b79c663 --- /dev/null +++ b/lib/libarchive/archive_string.c @@ -0,0 +1,125 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "archive_platform.h" +__FBSDID("$FreeBSD$"); + +/* + * Basic resizable string support, to simplify manipulating arbitrary-sized + * strings while minimizing heap activity. + */ + +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif + +#include "archive_private.h" +#include "archive_string.h" + +struct archive_string * +__archive_string_append(struct archive_string *as, const char *p, size_t s) +{ + __archive_string_ensure(as, as->length + s + 1); + memcpy(as->s + as->length, p, s); + as->s[as->length + s] = 0; + as->length += s; + return (as); +} + +void +__archive_string_copy(struct archive_string *dest, struct archive_string *src) +{ + __archive_string_ensure(dest, src->length + 1); + memcpy(dest->s, src->s, src->length); + dest->length = src->length; + dest->s[dest->length] = 0; +} + +void +__archive_string_free(struct archive_string *as) +{ + as->length = 0; + as->buffer_length = 0; + if (as->s != NULL) + free(as->s); +} + +struct archive_string * +__archive_string_ensure(struct archive_string *as, size_t s) +{ + if (as->s && (s <= as->buffer_length)) + return (as); + + if (as->buffer_length < 32) + as->buffer_length = 32; + while (as->buffer_length < s) + as->buffer_length *= 2; + as->s = (char *)realloc(as->s, as->buffer_length); + /* TODO: Return null instead and fix up all of our callers to + * handle this correctly. */ + if (as->s == NULL) + __archive_errx(1, "Out of memory"); + return (as); +} + +struct archive_string * +__archive_strncat(struct archive_string *as, const char *p, size_t n) +{ + size_t s; + const char *pp; + + /* Like strlen(p), except won't examine positions beyond p[n]. */ + s = 0; + pp = p; + while (*pp && s < n) { + pp++; + s++; + } + return (__archive_string_append(as, p, s)); +} + +struct archive_string * +__archive_strappend_char(struct archive_string *as, char c) +{ + return (__archive_string_append(as, &c, 1)); +} + +struct archive_string * +__archive_strappend_int(struct archive_string *as, int d, int base) +{ + static const char *digits = "0123456789abcdef"; + + if (d < 0) { + __archive_strappend_char(as, '-'); + d = -d; + } + if (d >= base) + __archive_strappend_int(as, d/base, base); + __archive_strappend_char(as, digits[d % base]); + return (as); +} |
