58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/**
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* Copyright (2019) Baidu Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* File: lightduer_uuid.h
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* Auth: Chen Chi (chenchi01@baidu.com)
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* Desc: uuid generation
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*/
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#include "lightduer_uuid.h"
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#include <stdlib.h>
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#include "lightduer_lib.h"
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void duer_generate_uuid(char *uuid_out)
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{
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const char *c = "89ab";
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char *p = uuid_out;
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for (int n = 0; n < 16; ++n) {
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int b = rand() % 255;
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switch (n) {
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case 6:
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sprintf(p, "4%x", b % 15);
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break;
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case 8:
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sprintf(p, "%c%x", c[rand() % DUER_STRLEN(c)], b % 15);
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break;
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default:
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sprintf(p, "%02x", b);
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break;
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}
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p += 2;
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switch (n) {
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case 3:
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case 5:
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case 7:
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case 9:
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*p++ = '-';
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break;
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}
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}
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*p = 0;
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}
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