//===-- UUID.cpp ------------------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "lldb/Utility/UUID.h" // Other libraries and framework includes // Project includes #include "lldb/Utility/Stream.h" #include "llvm/ADT/StringRef.h" // C Includes #include #include #include namespace lldb_private { UUID::UUID() : m_num_uuid_bytes(16) { ::memset(m_uuid, 0, sizeof(m_uuid)); } UUID::UUID(const UUID &rhs) { m_num_uuid_bytes = rhs.m_num_uuid_bytes; ::memcpy(m_uuid, rhs.m_uuid, sizeof(m_uuid)); } UUID::UUID(const void *uuid_bytes, uint32_t num_uuid_bytes) { SetBytes(uuid_bytes, num_uuid_bytes); } const UUID &UUID::operator=(const UUID &rhs) { if (this != &rhs) { m_num_uuid_bytes = rhs.m_num_uuid_bytes; ::memcpy(m_uuid, rhs.m_uuid, sizeof(m_uuid)); } return *this; } UUID::~UUID() {} void UUID::Clear() { m_num_uuid_bytes = 16; ::memset(m_uuid, 0, sizeof(m_uuid)); } const void *UUID::GetBytes() const { return m_uuid; } std::string UUID::GetAsString(const char *separator) const { std::string result; char buf[256]; if (!separator) separator = "-"; const uint8_t *u = (const uint8_t *)GetBytes(); if (sizeof(buf) > (size_t)snprintf(buf, sizeof(buf), "%2.2X%2.2X%2.2X%2.2X%s%2.2X%2.2X%s%2." "2X%2.2X%s%2.2X%2.2X%s%2.2X%2.2X%2.2X%" "2.2X%2.2X%2.2X", u[0], u[1], u[2], u[3], separator, u[4], u[5], separator, u[6], u[7], separator, u[8], u[9], separator, u[10], u[11], u[12], u[13], u[14], u[15])) { result.append(buf); if (m_num_uuid_bytes == 20) { if (sizeof(buf) > (size_t)snprintf(buf, sizeof(buf), "%s%2.2X%2.2X%2.2X%2.2X", separator, u[16], u[17], u[18], u[19])) result.append(buf); } } return result; } void UUID::Dump(Stream *s) const { const uint8_t *u = (const uint8_t *)GetBytes(); s->Printf("%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%" "2.2X%2.2X%2.2X%2.2X", u[0], u[1], u[2], u[3], u[4], u[5], u[6], u[7], u[8], u[9], u[10], u[11], u[12], u[13], u[14], u[15]); if (m_num_uuid_bytes == 20) { s->Printf("-%2.2X%2.2X%2.2X%2.2X", u[16], u[17], u[18], u[19]); } } bool UUID::SetBytes(const void *uuid_bytes, uint32_t num_uuid_bytes) { if (uuid_bytes) { switch (num_uuid_bytes) { case 20: m_num_uuid_bytes = 20; break; case 16: m_num_uuid_bytes = 16; m_uuid[16] = m_uuid[17] = m_uuid[18] = m_uuid[19] = 0; break; default: // Unsupported UUID byte size m_num_uuid_bytes = 0; break; } if (m_num_uuid_bytes > 0) { ::memcpy(m_uuid, uuid_bytes, m_num_uuid_bytes); return true; } } ::memset(m_uuid, 0, sizeof(m_uuid)); return false; } size_t UUID::GetByteSize() { return m_num_uuid_bytes; } bool UUID::IsValid() const { return m_uuid[0] || m_uuid[1] || m_uuid[2] || m_uuid[3] || m_uuid[4] || m_uuid[5] || m_uuid[6] || m_uuid[7] || m_uuid[8] || m_uuid[9] || m_uuid[10] || m_uuid[11] || m_uuid[12] || m_uuid[13] || m_uuid[14] || m_uuid[15] || m_uuid[16] || m_uuid[17] || m_uuid[18] || m_uuid[19]; } static inline int xdigit_to_int(char ch) { ch = tolower(ch); if (ch >= 'a' && ch <= 'f') return 10 + ch - 'a'; return ch - '0'; } llvm::StringRef UUID::DecodeUUIDBytesFromString(llvm::StringRef p, ValueType &uuid_bytes, uint32_t &bytes_decoded, uint32_t num_uuid_bytes) { ::memset(uuid_bytes, 0, sizeof(uuid_bytes)); size_t uuid_byte_idx = 0; while (!p.empty()) { if (isxdigit(p[0]) && isxdigit(p[1])) { int hi_nibble = xdigit_to_int(p[0]); int lo_nibble = xdigit_to_int(p[1]); // Translate the two hex nibble characters into a byte uuid_bytes[uuid_byte_idx] = (hi_nibble << 4) + lo_nibble; // Skip both hex digits p = p.drop_front(2); // Increment the byte that we are decoding within the UUID value // and break out if we are done if (++uuid_byte_idx == num_uuid_bytes) break; } else if (p.front() == '-') { // Skip dashes p = p.drop_front(); } else { // UUID values can only consist of hex characters and '-' chars break; } } // Clear trailing bytes to 0. for (uint32_t i = uuid_byte_idx; i < sizeof(ValueType); i++) uuid_bytes[i] = 0; bytes_decoded = uuid_byte_idx; return p; } size_t UUID::SetFromCString(const char *cstr, uint32_t num_uuid_bytes) { if (cstr == NULL) return 0; llvm::StringRef orig(cstr); llvm::StringRef p = orig; // Skip leading whitespace characters p = p.ltrim(); uint32_t bytes_decoded = 0; llvm::StringRef rest = UUID::DecodeUUIDBytesFromString(p, m_uuid, bytes_decoded, num_uuid_bytes); // If we successfully decoded a UUID, return the amount of characters that // were consumed if (bytes_decoded == num_uuid_bytes) { m_num_uuid_bytes = num_uuid_bytes; return orig.size() - rest.size(); } // Else return zero to indicate we were not able to parse a UUID value return 0; } } bool lldb_private::operator==(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) == 0; } bool lldb_private::operator!=(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) != 0; } bool lldb_private::operator<(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) < 0; } bool lldb_private::operator<=(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) <= 0; } bool lldb_private::operator>(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) > 0; } bool lldb_private::operator>=(const lldb_private::UUID &lhs, const lldb_private::UUID &rhs) { return ::memcmp(lhs.GetBytes(), rhs.GetBytes(), sizeof(lldb_private::UUID::ValueType)) >= 0; }