2 zip_string.c -- string handling (with encoding)
3 Copyright (C) 2012-2014 Dieter Baron and Thomas Klausner
5 This file is part of libzip, a library to manipulate ZIP archives.
6 The authors can be contacted at <libzip@nih.at>
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions
11 1. Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13 2. Redistributions in binary form must reproduce the above copyright
14 notice, this list of conditions and the following disclaimer in
15 the documentation and/or other materials provided with the
17 3. The names of the authors may not be used to endorse or promote
18 products derived from this software without specific prior
21 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 _zip_string_crc32(const zip_string_t *s)
46 crc = (zip_uint32_t)crc32(0L, Z_NULL, 0);
49 crc = (zip_uint32_t)crc32(crc, s->raw, s->length);
56 _zip_string_equal(const zip_string_t *a, const zip_string_t *b)
58 if (a == NULL || b == NULL)
61 if (a->length != b->length)
66 return (memcmp(a->raw, b->raw, a->length) == 0);
71 _zip_string_free(zip_string_t *s)
83 _zip_string_get(zip_string_t *string, zip_uint32_t *lenp, zip_flags_t flags, zip_error_t *error)
85 static const zip_uint8_t empty[1] = "";
93 if ((flags & ZIP_FL_ENC_RAW) == 0) {
95 if (string->encoding == ZIP_ENCODING_UNKNOWN)
96 _zip_guess_encoding(string, ZIP_ENCODING_UNKNOWN);
98 if (((flags & ZIP_FL_ENC_STRICT)
99 && string->encoding != ZIP_ENCODING_ASCII && string->encoding != ZIP_ENCODING_UTF8_KNOWN)
100 || (string->encoding == ZIP_ENCODING_CP437)) {
101 if (string->converted == NULL) {
102 if ((string->converted=_zip_cp437_to_utf8(string->raw, string->length,
103 &string->converted_length, error)) == NULL)
107 *lenp = string->converted_length;
108 return string->converted;
113 *lenp = string->length;
119 _zip_string_length(const zip_string_t *s)
129 _zip_string_new(const zip_uint8_t *raw, zip_uint16_t length, zip_flags_t flags, zip_error_t *error)
132 zip_encoding_type_t expected_encoding;
137 switch (flags & ZIP_FL_ENCODING_ALL) {
138 case ZIP_FL_ENC_GUESS:
139 expected_encoding = ZIP_ENCODING_UNKNOWN;
141 case ZIP_FL_ENC_UTF_8:
142 expected_encoding = ZIP_ENCODING_UTF8_KNOWN;
144 case ZIP_FL_ENC_CP437:
145 expected_encoding = ZIP_ENCODING_CP437;
148 zip_error_set(error, ZIP_ER_INVAL, 0);
152 if ((s=(zip_string_t *)malloc(sizeof(*s))) == NULL) {
153 zip_error_set(error, ZIP_ER_MEMORY, 0);
157 if ((s->raw=(zip_uint8_t *)malloc((size_t)(length+1))) == NULL) {
162 memcpy(s->raw, raw, length);
163 s->raw[length] = '\0';
165 s->encoding = ZIP_ENCODING_UNKNOWN;
167 s->converted_length = 0;
169 if (expected_encoding != ZIP_ENCODING_UNKNOWN) {
170 if (_zip_guess_encoding(s, expected_encoding) == ZIP_ENCODING_ERROR) {
172 zip_error_set(error, ZIP_ER_INVAL, 0);
182 _zip_string_write(zip_t *za, const zip_string_t *s)
187 return _zip_write(za, s->raw, s->length);