2 Copyright (c) 2005-2006, John Hurst
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
8 1. Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10 2. Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13 3. The name of the author may not be used to endorse or promote products
14 derived from this software without specific prior written permission.
16 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 \brief Utility functions
43 template <class T, int SIZE = 16>
44 class IntPrinter : public std::string
51 inline const char* c_str() { return m_strbuf; }
53 IntPrinter(const char* format, T value) {
54 snprintf(m_strbuf, SIZE, format, value);
58 struct i8Printer : public IntPrinter<i8_t> {
59 i8Printer(i8_t value) : IntPrinter<i8_t>("%hd", value) {}
62 struct ui8Printer : public IntPrinter<ui8_t> {
63 ui8Printer(ui8_t value) : IntPrinter<ui8_t>("%hu", value) {}
66 struct i16Printer : public IntPrinter<i16_t> {
67 i16Printer(i16_t value) : IntPrinter<i16_t>("%hd", value) {}
70 struct ui16Printer : public IntPrinter<ui16_t> {
71 ui16Printer(ui16_t value) : IntPrinter<ui16_t>("%hu", value) {}
74 struct i32Printer : public IntPrinter<i32_t> {
75 i32Printer(i32_t value) : IntPrinter<i32_t>("%d", value) {}
78 struct ui32Printer : public IntPrinter<ui32_t> {
79 ui32Printer(ui32_t value) : IntPrinter<ui32_t>("%u", value) {}
83 struct i64Printer : public IntPrinter<i64_t, 32> {
84 i64Printer(i64_t value) : IntPrinter<i64_t, 32>("%I64d", value) {}
87 struct ui64Printer : public IntPrinter<ui64_t, 32> {
88 ui64Printer(ui64_t value) : IntPrinter<ui64_t, 32>("%I64u", value) {}
91 struct i64Printer : public IntPrinter<i64_t, 32> {
92 i64Printer(i64_t value) : IntPrinter<i64_t, 32>("%qd", value) {}
95 struct ui64Printer : public IntPrinter<ui64_t, 32> {
96 ui64Printer(ui64_t value) : IntPrinter<ui64_t, 32>("%qu", value) {}
100 // Convert NULL-terminated UTF-8 hexadecimal string to binary, returns 0 if
101 // the binary buffer was large enough to hold the result. The output parameter
102 // 'char_count' will contain the length of the converted string. If the output
103 // buffer is too small or any of the pointer arguments are NULL, the subroutine
104 // will return -1 and set 'char_count' to the required buffer size. No data will
105 // be written to 'buf' if the subroutine fails.
106 i32_t hex2bin(const char* str, byte_t* buf, ui32_t buf_len, ui32_t* char_count);
108 // Convert a binary string to NULL-terminated UTF-8 hexadecimal, returns the buffer
109 // if the binary buffer was large enough to hold the result. If the output buffer
110 // is too small or any of the pointer arguments are NULL, the subroutine will
113 const char* bin2hex(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
115 const char* bin2UUIDhex(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
117 // same as above for base64 text
118 i32_t base64decode(const char* str, byte_t* buf, ui32_t buf_len, ui32_t* char_count);
119 const char* base64encode(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
121 // returns the length of a Base64 encoding of a buffer of the given length
122 inline ui32_t base64_encode_length(ui32_t length) {
123 while ( ( length % 3 ) != 0 )
126 return ( length / 3 ) * 4;
129 // print buffer contents to a stream as hexadecimal values in numbered
130 // rows of 16-bytes each.
132 void hexdump(const byte_t* buf, ui32_t dump_len, FILE* stream = 0);
134 // Return the length in bytes of a BER encoded value
135 inline ui32_t BER_length(const byte_t* buf)
137 if ( buf == 0 || (*buf & 0xf0) != 0x80 )
140 return (*buf & 0x0f) + 1;
144 bool read_BER(const byte_t* buf, ui64_t* val);
146 // decode a ber value and compare it to a test value
147 bool read_test_BER(byte_t **buf, ui64_t test_value);
149 // create BER encoding of integer value
150 bool write_BER(byte_t* buf, ui64_t val, ui32_t ber_len = 0);
152 //----------------------------------------------------------------
158 virtual ~IArchive(){}
159 virtual bool HasValue() const = 0;
160 virtual bool Archive(MemIOWriter* Writer) const = 0;
161 virtual bool Unarchive(MemIOReader* Reader) = 0;
166 // the base of all identifier classes
167 template <ui32_t SIZE>
168 class Identifier : public IArchive
172 byte_t m_Value[SIZE];
175 Identifier() : m_HasValue(false) { memset(m_Value, 0, SIZE); }
176 Identifier(const byte_t* value) : m_HasValue(true) { memcpy(m_Value, value, SIZE); }
177 Identifier(const Identifier& rhs) : m_HasValue(true) { memcpy(m_Value, rhs.m_Value, SIZE); }
178 virtual ~Identifier() {}
180 const Identifier& operator=(const Identifier& rhs) {
182 memcpy(m_Value, rhs.m_Value, SIZE);
186 inline void Set(const byte_t* value) { m_HasValue = true; memcpy(m_Value, value, SIZE); }
187 inline const byte_t* Value() const { return m_Value; }
188 inline ui32_t Size() const { return SIZE; }
190 inline bool operator<(const Identifier& rhs) const
192 ui32_t test_size = xmin(rhs.Size(), SIZE);
193 for ( ui32_t i = 0; i < test_size; i++ )
195 if ( m_Value[i] != rhs.m_Value[i] )
196 return m_Value[i] < rhs.m_Value[i];
202 inline bool operator==(const Identifier& rhs) const
204 if ( rhs.Size() != SIZE ) return false;
205 return ( memcmp(m_Value, rhs.m_Value, SIZE) == 0 );
208 inline bool operator!=(const Identifier& rhs) const
210 if ( rhs.Size() != SIZE ) return true;
211 return ( memcmp(m_Value, rhs.m_Value, SIZE) != 0 );
214 inline bool DecodeHex(const char* str)
217 if ( hex2bin(str, m_Value, SIZE, &char_count) != 0 )
224 inline const char* EncodeHex(char* buf, ui32_t buf_len) const
226 return bin2hex(m_Value, SIZE, buf, buf_len);
229 inline const char* EncodeString(char* str_buf, ui32_t buf_len) const {
230 return EncodeHex(str_buf, buf_len);
233 inline bool DecodeBase64(const char* str)
236 if ( base64decode(str, m_Value, SIZE, &char_count) != 0 )
243 inline const char* EncodeBase64(char* buf, ui32_t buf_len) const
245 return base64encode(m_Value, SIZE, buf, buf_len);
248 inline virtual bool HasValue() const { return m_HasValue; }
250 inline virtual bool Unarchive(Kumu::MemIOReader* Reader) {
251 if ( ! Reader->ReadRaw(m_Value, SIZE) ) return false;
256 inline virtual bool Archive(Kumu::MemIOWriter* Writer) const {
257 return Writer->WriteRaw(m_Value, SIZE);
264 const ui32_t UUID_Length = 16;
265 class UUID : public Identifier<UUID_Length>
269 UUID(const byte_t* value) : Identifier<UUID_Length>(value) {}
270 UUID(const UUID& rhs) : Identifier<UUID_Length>(rhs) {}
273 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
274 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
278 void GenRandomUUID(byte_t* buf);
279 void GenRandomValue(UUID&);
281 // a self-wiping key container
283 const ui32_t SymmetricKey_Length = 16;
284 const byte_t NilKey[SymmetricKey_Length] = {
285 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce,
286 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce
289 class SymmetricKey : public Identifier<SymmetricKey_Length>
293 SymmetricKey(const byte_t* value) : Identifier<SymmetricKey_Length>(value) {}
294 SymmetricKey(const UUID& rhs) : Identifier<SymmetricKey_Length>(rhs) {}
295 virtual ~SymmetricKey() { memcpy(m_Value, NilKey, 16); m_HasValue = false; }
298 void GenRandomValue(SymmetricKey&);
301 // 2004-05-01T13:20:00-00:00
302 const ui32_t DateTimeLen = 25; // the number of chars in the xs:dateTime format (sans milliseconds)
304 // UTC time+date representation
305 class Timestamp : public IArchive
316 Timestamp(const Timestamp& rhs);
317 Timestamp(const char* datestr);
318 virtual ~Timestamp();
320 const Timestamp& operator=(const Timestamp& rhs);
321 bool operator<(const Timestamp& rhs) const;
322 bool operator==(const Timestamp& rhs) const;
323 bool operator!=(const Timestamp& rhs) const;
325 // Write the timestamp value to the given buffer in the form 2004-05-01T13:20:00-00:00
326 // returns 0 if the buffer is smaller than DateTimeLen
327 const char* EncodeString(char* str_buf, ui32_t buf_len) const;
329 // decode and set value from string formatted by EncodeString
330 bool DecodeString(const char* datestr);
332 // add the given number of days or hours to the timestamp value. Values less than zero
333 // will cause the value to decrease
335 void AddHours(i32_t);
337 // Read and write the timestamp value as a byte string
338 virtual bool HasValue() const;
339 virtual bool Archive(MemIOWriter* Writer) const;
340 virtual bool Unarchive(MemIOReader* Reader);
346 KM_NO_COPY_CONSTRUCT(ByteString);
349 byte_t* m_Data; // pointer to memory area containing frame data
350 ui32_t m_Capacity; // size of memory area pointed to by m_Data
351 ui32_t m_Length; // length of byte string in memory area pointed to by m_Data
355 ByteString(ui32_t cap);
356 virtual ~ByteString();
358 // Sets the size of the internally allocated buffer.
359 // Resets content Size to zero.
360 Result_t Capacity(ui32_t cap);
362 Result_t Append(const ByteString&);
363 Result_t Append(const byte_t* buf, ui32_t buf_len);
365 // returns the size of the buffer
366 inline ui32_t Capacity() const { return m_Capacity; }
368 // returns a const pointer to the essence data
369 inline const byte_t* RoData() const { return m_Data; }
371 // returns a non-const pointer to the essence data
372 inline byte_t* Data() { return m_Data; }
374 // set the length of the buffer's contents
375 inline ui32_t Length(ui32_t l) { return m_Length = l; }
377 // returns the length of the buffer's contents
378 inline ui32_t Length() const { return m_Length; }
380 // copy the given data into the ByteString, set Length value.
381 // Returns error if the ByteString is too small.
382 Result_t Set(const byte_t* buf, ui32_t buf_len);
388 #endif // _KM_UTIL_H_