//===-- 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/Core/UUID.h"
// C Includes
#include <string.h>
#include <stdio.h>
#include <ctype.h>
// C++ Includes
#include <string>
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Stream.h"
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';
}
size_t
UUID::DecodeUUIDBytesFromCString (const char *p, ValueType &uuid_bytes, const char **end, uint32_t num_uuid_bytes)
{
size_t uuid_byte_idx = 0;
if (p)
{
while (*p)
{
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 += 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 == '-')
{
// Skip dashes
p++;
}
else
{
// UUID values can only consist of hex characters and '-' chars
break;
}
}
}
if (end)
*end = p;
// Clear trailing bytes to 0.
for (uint32_t i = uuid_byte_idx; i < sizeof(ValueType); i++)
uuid_bytes[i] = 0;
return uuid_byte_idx;
}
size_t
UUID::SetFromCString (const char *cstr, uint32_t num_uuid_bytes)
{
if (cstr == NULL)
return 0;
const char *p = cstr;
// Skip leading whitespace characters
while (isspace(*p))
++p;
const size_t uuid_byte_idx = UUID::DecodeUUIDBytesFromCString (p, m_uuid, &p, num_uuid_bytes);
// If we successfully decoded a UUID, return the amount of characters that
// were consumed
if (uuid_byte_idx == num_uuid_bytes)
return p - cstr;
// 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;
}