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Diffstat (limited to 'third_party/heimdal/lib/base/data.c')
| -rw-r--r-- | third_party/heimdal/lib/base/data.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/base/data.c b/third_party/heimdal/lib/base/data.c new file mode 100644 index 0000000..cefdde0 --- /dev/null +++ b/third_party/heimdal/lib/base/data.c @@ -0,0 +1,166 @@ +/* + * Copyright (c) 2011 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 "baselocl.h" +#include <string.h> + +static void HEIM_CALLCONV +data_dealloc(void *ptr) +{ + heim_data_t d = ptr; + heim_octet_string *os = (heim_octet_string *)d; + heim_data_free_f_t *deallocp; + heim_data_free_f_t dealloc; + + if (os->data == NULL) + return; + + /* Possible string ref */ + deallocp = _heim_get_isaextra(os, 0); + dealloc = *deallocp; + if (dealloc != NULL) + dealloc(os->data); +} + +static int +data_cmp(void *a, void *b) +{ + heim_octet_string *osa = a, *osb = b; + if (osa->length != osb->length) + return osa->length - osb->length; + return memcmp(osa->data, osb->data, osa->length); +} + +static uintptr_t +data_hash(void *ptr) +{ + heim_octet_string *os = ptr; + const unsigned char *s = os->data; + + if (os->length < 4) + return os->length; + + return ((unsigned long)s[os->length - 1] << 24) + | (s[os->length - 2] << 16) | (s[1] << 8) | s[0]; +} + +struct heim_type_data _heim_data_object = { + HEIM_TID_DATA, + "data-object", + NULL, + data_dealloc, + NULL, + data_cmp, + data_hash, + NULL +}; + +/** + * Create a data object + * + * @param string the string to create, must be an utf8 string + * + * @return string object + */ + +heim_data_t +heim_data_create(const void *data, size_t length) +{ + heim_octet_string *os; + + os = _heim_alloc_object(&_heim_data_object, sizeof(*os) + length); + if (os) { + os->data = (uint8_t *)os + sizeof(*os); + os->length = length; + memcpy(os->data, data, length); + } + return (heim_data_t)os; +} + +heim_data_t +heim_data_ref_create(const void *data, size_t length, + heim_data_free_f_t dealloc) +{ + heim_octet_string *os; + heim_data_free_f_t *deallocp; + + os = _heim_alloc_object(&_heim_data_object, sizeof(*os) + length); + if (os) { + os->data = (void *)data; + os->length = length; + deallocp = _heim_get_isaextra(os, 0); + *deallocp = dealloc; + } + return (heim_data_t)os; +} + + +/** + * Return the type ID of data objects + * + * @return type id of data objects + */ + +heim_tid_t +heim_data_get_type_id(void) +{ + return HEIM_TID_DATA; +} + +/** + * Get the data value of the content. + * + * @param data the data object to get the value from + * + * @return a heim_octet_string + */ + +const heim_octet_string * +heim_data_get_data(heim_data_t data) +{ + /* Note that this works for data and data_ref objects */ + return (const heim_octet_string *)data; +} + +const void * +heim_data_get_ptr(heim_data_t data) +{ + /* Note that this works for data and data_ref objects */ + return ((const heim_octet_string *)data)->data; +} + +size_t heim_data_get_length(heim_data_t data) +{ + /* Note that this works for data and data_ref objects */ + return ((const heim_octet_string *)data)->length; +} |