uuid.c revision 256281
1/* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <stdio.h> /* for sprintf */ 18 19#include "apr.h" 20#include "apr_uuid.h" 21#include "apr_errno.h" 22#include "apr_lib.h" 23 24 25APU_DECLARE(void) apr_uuid_format(char *buffer, const apr_uuid_t *uuid) 26{ 27 const unsigned char *d = uuid->data; 28 29 sprintf(buffer, 30 "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 31 d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], 32 d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]); 33} 34 35/* convert a pair of hex digits to an integer value [0,255] */ 36#if 'A' == 65 37static unsigned char parse_hexpair(const char *s) 38{ 39 int result; 40 int temp; 41 42 result = s[0] - '0'; 43 if (result > 48) 44 result = (result - 39) << 4; 45 else if (result > 16) 46 result = (result - 7) << 4; 47 else 48 result = result << 4; 49 50 temp = s[1] - '0'; 51 if (temp > 48) 52 result |= temp - 39; 53 else if (temp > 16) 54 result |= temp - 7; 55 else 56 result |= temp; 57 58 return (unsigned char)result; 59} 60#else 61static unsigned char parse_hexpair(const char *s) 62{ 63 int result; 64 65 if (isdigit(*s)) { 66 result = (*s - '0') << 4; 67 } 68 else { 69 if (isupper(*s)) { 70 result = (*s - 'A' + 10) << 4; 71 } 72 else { 73 result = (*s - 'a' + 10) << 4; 74 } 75 } 76 77 ++s; 78 if (isdigit(*s)) { 79 result |= (*s - '0'); 80 } 81 else { 82 if (isupper(*s)) { 83 result |= (*s - 'A' + 10); 84 } 85 else { 86 result |= (*s - 'a' + 10); 87 } 88 } 89 90 return (unsigned char)result; 91} 92#endif 93 94APU_DECLARE(apr_status_t) apr_uuid_parse(apr_uuid_t *uuid, 95 const char *uuid_str) 96{ 97 int i; 98 unsigned char *d = uuid->data; 99 100 for (i = 0; i < 36; ++i) { 101 char c = uuid_str[i]; 102 if (!apr_isxdigit(c) && 103 !(c == '-' && (i == 8 || i == 13 || i == 18 || i == 23))) 104 /* ### need a better value */ 105 return APR_BADARG; 106 } 107 if (uuid_str[36] != '\0') { 108 /* ### need a better value */ 109 return APR_BADARG; 110 } 111 112 d[0] = parse_hexpair(&uuid_str[0]); 113 d[1] = parse_hexpair(&uuid_str[2]); 114 d[2] = parse_hexpair(&uuid_str[4]); 115 d[3] = parse_hexpair(&uuid_str[6]); 116 117 d[4] = parse_hexpair(&uuid_str[9]); 118 d[5] = parse_hexpair(&uuid_str[11]); 119 120 d[6] = parse_hexpair(&uuid_str[14]); 121 d[7] = parse_hexpair(&uuid_str[16]); 122 123 d[8] = parse_hexpair(&uuid_str[19]); 124 d[9] = parse_hexpair(&uuid_str[21]); 125 126 for (i = 6; i--;) 127 d[10 + i] = parse_hexpair(&uuid_str[i*2+24]); 128 129 return APR_SUCCESS; 130} 131