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25 #ifndef _BSD_SOURCE

26 #define _BSD_SOURCE 1

27 #endif

28 #ifndef _DEFAULT_SOURCE

29 #define _DEFAULT_SOURCE 1

30 #endif

31 #ifndef __STDC_LIMIT_MACROS

32 # define __STDC_LIMIT_MACROS 1

33 #endif

35 #include "cbor.h"

36 #include "compilersupport_p.h"

37 #include <stdlib.h>

39 /**

40 * \fn CborError cbor_value_dup_text_string(const CborValue *value, char **buffer, size_t *buflen, CborValue *next)

41 *

42 * Allocates memory for the string pointed by \a value and copies it into this

43 * buffer. The pointer to the buffer is stored in \a buffer and the number of

44 * bytes copied is stored in \a buflen (those variables must not be NULL).

45 *

46 * If the iterator \a value does not point to a text string, the behaviour is

47 * undefined, so checking with \ref cbor_value_get_type or \ref

48 * cbor_value_is_text_string is recommended.

49 *

50 * If \c malloc returns a NULL pointer, this function will return error

51 * condition \ref CborErrorOutOfMemory.

52 *

53 * On success, \c{*buffer} will contain a valid pointer that must be freed by

54 * calling \c{free()}. This is the case even for zero-length strings.

55 *

56 * The \a next pointer, if not null, will be updated to point to the next item

57 * after this string. If \a value points to the last item, then \a next will be

58 * invalid.

59 *

60 * This function may not run in constant time (it will run in O(n) time on the

61 * number of chunks). It requires constant memory (O(1)) in addition to the

62 * malloc'ed block.

63 *

64 * \note This function does not perform UTF-8 validation on the incoming text

65 * string.

66 *

67 * \sa cbor_value_get_text_string_chunk(), cbor_value_copy_text_string(), cbor_value_dup_byte_string()

68 */

70 /**

71 * \fn CborError cbor_value_dup_byte_string(const CborValue *value, uint8_t **buffer, size_t *buflen, CborValue *next)

72 *

73 * Allocates memory for the string pointed by \a value and copies it into this

74 * buffer. The pointer to the buffer is stored in \a buffer and the number of

75 * bytes copied is stored in \a buflen (those variables must not be NULL).

76 *

77 * If the iterator \a value does not point to a byte string, the behaviour is

78 * undefined, so checking with \ref cbor_value_get_type or \ref

79 * cbor_value_is_byte_string is recommended.

80 *

81 * If \c malloc returns a NULL pointer, this function will return error

82 * condition \ref CborErrorOutOfMemory.

83 *

84 * On success, \c{*buffer} will contain a valid pointer that must be freed by

85 * calling \c{free()}. This is the case even for zero-length strings.

86 *

87 * The \a next pointer, if not null, will be updated to point to the next item

88 * after this string. If \a value points to the last item, then \a next will be

89 * invalid.

90 *

91 * This function may not run in constant time (it will run in O(n) time on the

92 * number of chunks). It requires constant memory (O(1)) in addition to the

93 * malloc'ed block.

94 *

95 * \sa cbor_value_get_text_string_chunk(), cbor_value_copy_byte_string(), cbor_value_dup_text_string()

96 */

 CborError _cbor_value_dup_string(const CborValue *value, void **buffer, size_t *buflen, CborValue *next)

98 {

99 CborError err;

100 cbor_assert(buffer);

101 cbor_assert(buflen);

102 *buflen = SIZE_MAX;

     err = _cbor_value_copy_string(value, NULL, buflen, NULL);

104 if (err)

105 return err;

106

107 ++*buflen;

     *buffer = malloc(*buflen);

109 if (!*buffer) {

110 /* out of memory */

111 return CborErrorOutOfMemory;

112 }

     err = _cbor_value_copy_string(value, *buffer, buflen, next);

114 if (err) {

115 free(*buffer);

116 return err;

117 }

118 return CborNoError;

119 }