1 //===-- UUID.cpp ------------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "lldb/Utility/UUID.h"
12 // Other libraries and framework includes
14 #include "lldb/Utility/Stream.h"
15 #include "llvm/ADT/StringRef.h"
22 namespace lldb_private {
24 UUID::UUID() { Clear(); }
26 UUID::UUID(const UUID &rhs) {
27 SetBytes(rhs.m_uuid, rhs.m_num_uuid_bytes);
30 UUID::UUID(const void *uuid_bytes, uint32_t num_uuid_bytes) {
31 SetBytes(uuid_bytes, num_uuid_bytes);
34 const UUID &UUID::operator=(const UUID &rhs) {
36 m_num_uuid_bytes = rhs.m_num_uuid_bytes;
37 ::memcpy(m_uuid, rhs.m_uuid, sizeof(m_uuid));
45 m_num_uuid_bytes = 16;
46 ::memset(m_uuid, 0, sizeof(m_uuid));
49 const void *UUID::GetBytes() const { return m_uuid; }
51 std::string UUID::GetAsString(const char *separator) const {
56 const uint8_t *u = (const uint8_t *)GetBytes();
58 (size_t)snprintf(buf, sizeof(buf), "%2.2X%2.2X%2.2X%2.2X%s%2.2X%2.2X%s%2."
59 "2X%2.2X%s%2.2X%2.2X%s%2.2X%2.2X%2.2X%"
61 u[0], u[1], u[2], u[3], separator, u[4], u[5], separator,
62 u[6], u[7], separator, u[8], u[9], separator, u[10],
63 u[11], u[12], u[13], u[14], u[15])) {
65 if (m_num_uuid_bytes == 20) {
66 if (sizeof(buf) > (size_t)snprintf(buf, sizeof(buf),
67 "%s%2.2X%2.2X%2.2X%2.2X", separator,
68 u[16], u[17], u[18], u[19]))
75 void UUID::Dump(Stream *s) const {
76 s->PutCString(GetAsString().c_str());
79 bool UUID::SetBytes(const void *uuid_bytes, uint32_t num_uuid_bytes) {
81 switch (num_uuid_bytes) {
83 m_num_uuid_bytes = 20;
86 m_num_uuid_bytes = 16;
87 m_uuid[16] = m_uuid[17] = m_uuid[18] = m_uuid[19] = 0;
90 // Unsupported UUID byte size
95 if (m_num_uuid_bytes > 0) {
96 ::memcpy(m_uuid, uuid_bytes, m_num_uuid_bytes);
100 ::memset(m_uuid, 0, sizeof(m_uuid));
104 size_t UUID::GetByteSize() const { return m_num_uuid_bytes; }
106 bool UUID::IsValid() const {
107 return m_uuid[0] || m_uuid[1] || m_uuid[2] || m_uuid[3] || m_uuid[4] ||
108 m_uuid[5] || m_uuid[6] || m_uuid[7] || m_uuid[8] || m_uuid[9] ||
109 m_uuid[10] || m_uuid[11] || m_uuid[12] || m_uuid[13] || m_uuid[14] ||
110 m_uuid[15] || m_uuid[16] || m_uuid[17] || m_uuid[18] || m_uuid[19];
113 static inline int xdigit_to_int(char ch) {
115 if (ch >= 'a' && ch <= 'f')
116 return 10 + ch - 'a';
120 llvm::StringRef UUID::DecodeUUIDBytesFromString(llvm::StringRef p,
121 ValueType &uuid_bytes,
122 uint32_t &bytes_decoded,
123 uint32_t num_uuid_bytes) {
124 ::memset(uuid_bytes, 0, sizeof(uuid_bytes));
125 size_t uuid_byte_idx = 0;
127 if (isxdigit(p[0]) && isxdigit(p[1])) {
128 int hi_nibble = xdigit_to_int(p[0]);
129 int lo_nibble = xdigit_to_int(p[1]);
130 // Translate the two hex nibble characters into a byte
131 uuid_bytes[uuid_byte_idx] = (hi_nibble << 4) + lo_nibble;
133 // Skip both hex digits
136 // Increment the byte that we are decoding within the UUID value
137 // and break out if we are done
138 if (++uuid_byte_idx == num_uuid_bytes)
140 } else if (p.front() == '-') {
144 // UUID values can only consist of hex characters and '-' chars
149 // Clear trailing bytes to 0.
150 for (uint32_t i = uuid_byte_idx; i < sizeof(ValueType); i++)
152 bytes_decoded = uuid_byte_idx;
156 size_t UUID::SetFromStringRef(llvm::StringRef str, uint32_t num_uuid_bytes) {
157 llvm::StringRef p = str;
159 // Skip leading whitespace characters
162 uint32_t bytes_decoded = 0;
163 llvm::StringRef rest =
164 UUID::DecodeUUIDBytesFromString(p, m_uuid, bytes_decoded, num_uuid_bytes);
166 // If we successfully decoded a UUID, return the amount of characters that
168 if (bytes_decoded == num_uuid_bytes) {
169 m_num_uuid_bytes = num_uuid_bytes;
170 return str.size() - rest.size();
173 // Else return zero to indicate we were not able to parse a UUID value
177 size_t UUID::SetFromCString(const char *cstr, uint32_t num_uuid_bytes) {
181 return SetFromStringRef(cstr, num_uuid_bytes);
185 bool lldb_private::operator==(const lldb_private::UUID &lhs,
186 const lldb_private::UUID &rhs) {
187 return ::memcmp(lhs.GetBytes(), rhs.GetBytes(),
188 sizeof(lldb_private::UUID::ValueType)) == 0;
191 bool lldb_private::operator!=(const lldb_private::UUID &lhs,
192 const lldb_private::UUID &rhs) {
193 return !(lhs == rhs);
196 bool lldb_private::operator<(const lldb_private::UUID &lhs,
197 const lldb_private::UUID &rhs) {
198 return ::memcmp(lhs.GetBytes(), rhs.GetBytes(),
199 sizeof(lldb_private::UUID::ValueType)) < 0;
202 bool lldb_private::operator<=(const lldb_private::UUID &lhs,
203 const lldb_private::UUID &rhs) {
207 bool lldb_private::operator>(const lldb_private::UUID &lhs,
208 const lldb_private::UUID &rhs) {
212 bool lldb_private::operator>=(const lldb_private::UUID &lhs,
213 const lldb_private::UUID &rhs) {