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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/common/uuid.h>
#include <aws/common/byte_buf.h>
#include <aws/common/device_random.h>
#include <inttypes.h>
#include <stdio.h>
#define HEX_CHAR_FMT "%02" SCNx8
#define UUID_FORMAT \
HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT \
"-" HEX_CHAR_FMT HEX_CHAR_FMT "-" HEX_CHAR_FMT HEX_CHAR_FMT "-" HEX_CHAR_FMT HEX_CHAR_FMT \
"-" HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT HEX_CHAR_FMT
#include <stdio.h>
#ifdef _MSC_VER
/* disables warning non const declared initializers for Microsoft compilers */
# pragma warning(disable : 4204)
# pragma warning(disable : 4706)
/* sscanf warning */
# pragma warning(disable : 4996)
#endif
int aws_uuid_init(struct aws_uuid *uuid) {
struct aws_byte_buf buf = aws_byte_buf_from_empty_array(uuid->uuid_data, sizeof(uuid->uuid_data));
return aws_device_random_buffer(&buf);
}
int aws_uuid_init_from_str(struct aws_uuid *uuid, const struct aws_byte_cursor *uuid_str) {
AWS_ERROR_PRECONDITION(uuid_str->len >= AWS_UUID_STR_LEN - 1, AWS_ERROR_INVALID_BUFFER_SIZE);
char cpy[AWS_UUID_STR_LEN] = {0};
memcpy(cpy, uuid_str->ptr, AWS_UUID_STR_LEN - 1);
AWS_ZERO_STRUCT(*uuid);
if (16 != sscanf(
cpy,
UUID_FORMAT,
&uuid->uuid_data[0],
&uuid->uuid_data[1],
&uuid->uuid_data[2],
&uuid->uuid_data[3],
&uuid->uuid_data[4],
&uuid->uuid_data[5],
&uuid->uuid_data[6],
&uuid->uuid_data[7],
&uuid->uuid_data[8],
&uuid->uuid_data[9],
&uuid->uuid_data[10],
&uuid->uuid_data[11],
&uuid->uuid_data[12],
&uuid->uuid_data[13],
&uuid->uuid_data[14],
&uuid->uuid_data[15])) {
return aws_raise_error(AWS_ERROR_MALFORMED_INPUT_STRING);
}
return AWS_OP_SUCCESS;
}
int aws_uuid_to_str(const struct aws_uuid *uuid, struct aws_byte_buf *output) {
size_t space_remaining = output->capacity - output->len;
AWS_ERROR_PRECONDITION(space_remaining >= AWS_UUID_STR_LEN, AWS_ERROR_SHORT_BUFFER);
snprintf(
(char *)(output->buffer + output->len),
space_remaining,
UUID_FORMAT,
uuid->uuid_data[0],
uuid->uuid_data[1],
uuid->uuid_data[2],
uuid->uuid_data[3],
uuid->uuid_data[4],
uuid->uuid_data[5],
uuid->uuid_data[6],
uuid->uuid_data[7],
uuid->uuid_data[8],
uuid->uuid_data[9],
uuid->uuid_data[10],
uuid->uuid_data[11],
uuid->uuid_data[12],
uuid->uuid_data[13],
uuid->uuid_data[14],
uuid->uuid_data[15]);
output->len += AWS_UUID_STR_LEN - 1;
return AWS_OP_SUCCESS;
}
bool aws_uuid_equals(const struct aws_uuid *a, const struct aws_uuid *b) {
return 0 == memcmp(a->uuid_data, b->uuid_data, sizeof(a->uuid_data));
}
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