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https://github.com/RfidResearchGroup/proxmark3.git
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120 lines
4.7 KiB
C
120 lines
4.7 KiB
C
/****************************************************************************
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**
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** Copyright (C) 2016 Intel Corporation
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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** copies of the Software, and to permit persons to whom the Software is
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** furnished to do so, subject to the following conditions:
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**
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** The above copyright notice and this permission notice shall be included in
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** all copies or substantial portions of the Software.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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** THE SOFTWARE.
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**
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****************************************************************************/
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#ifndef _BSD_SOURCE
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#define _BSD_SOURCE 1
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#endif
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#ifndef _DEFAULT_SOURCE
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#define _DEFAULT_SOURCE 1
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#endif
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#ifndef __STDC_LIMIT_MACROS
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# define __STDC_LIMIT_MACROS 1
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#endif
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#include "cbor.h"
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#include "compilersupport_p.h"
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#include <stdlib.h>
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/**
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* \fn CborError cbor_value_dup_text_string(const CborValue *value, char **buffer, size_t *buflen, CborValue *next)
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*
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* Allocates memory for the string pointed by \a value and copies it into this
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* buffer. The pointer to the buffer is stored in \a buffer and the number of
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* bytes copied is stored in \a buflen (those variables must not be NULL).
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*
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* If the iterator \a value does not point to a text string, the behaviour is
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* undefined, so checking with \ref cbor_value_get_type or \ref
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* cbor_value_is_text_string is recommended.
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*
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* If \c malloc returns a NULL pointer, this function will return error
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* condition \ref CborErrorOutOfMemory.
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*
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* On success, \c{*buffer} will contain a valid pointer that must be freed by
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* calling \c{free()}. This is the case even for zero-length strings.
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*
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* The \a next pointer, if not null, will be updated to point to the next item
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* after this string. If \a value points to the last item, then \a next will be
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* invalid.
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*
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* This function may not run in constant time (it will run in O(n) time on the
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* number of chunks). It requires constant memory (O(1)) in addition to the
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* malloc'ed block.
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*
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* \note This function does not perform UTF-8 validation on the incoming text
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* string.
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*
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* \sa cbor_value_get_text_string_chunk(), cbor_value_copy_text_string(), cbor_value_dup_byte_string()
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*/
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/**
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* \fn CborError cbor_value_dup_byte_string(const CborValue *value, uint8_t **buffer, size_t *buflen, CborValue *next)
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*
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* Allocates memory for the string pointed by \a value and copies it into this
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* buffer. The pointer to the buffer is stored in \a buffer and the number of
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* bytes copied is stored in \a buflen (those variables must not be NULL).
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*
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* If the iterator \a value does not point to a byte string, the behaviour is
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* undefined, so checking with \ref cbor_value_get_type or \ref
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* cbor_value_is_byte_string is recommended.
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*
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* If \c malloc returns a NULL pointer, this function will return error
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* condition \ref CborErrorOutOfMemory.
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*
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* On success, \c{*buffer} will contain a valid pointer that must be freed by
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* calling \c{free()}. This is the case even for zero-length strings.
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*
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* The \a next pointer, if not null, will be updated to point to the next item
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* after this string. If \a value points to the last item, then \a next will be
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* invalid.
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*
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* This function may not run in constant time (it will run in O(n) time on the
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* number of chunks). It requires constant memory (O(1)) in addition to the
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* malloc'ed block.
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*
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* \sa cbor_value_get_text_string_chunk(), cbor_value_copy_byte_string(), cbor_value_dup_text_string()
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*/
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CborError _cbor_value_dup_string(const CborValue *value, void **buffer, size_t *buflen, CborValue *next)
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{
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CborError err;
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cbor_assert(buffer);
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cbor_assert(buflen);
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*buflen = SIZE_MAX;
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err = _cbor_value_copy_string(value, NULL, buflen, NULL);
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if (err)
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return err;
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++*buflen;
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*buffer = calloc(*buflen, sizeof(uint8_t));
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if (!*buffer) {
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/* out of memory */
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return CborErrorOutOfMemory;
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}
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err = _cbor_value_copy_string(value, *buffer, buflen, next);
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if (err) {
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free(*buffer);
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return err;
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}
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return CborNoError;
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}
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