2 Copyright (c) 2005-2009, John Hurst
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
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9 notice, this list of conditions and the following disclaimer.
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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
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18 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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25 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 \brief Utility functions
43 // The version number declaration and explanation are in ../configure.ac
44 const char* Version();
46 // a class that represents the string form of a value
47 template <class T, int SIZE = 16>
48 class IntPrinter : public std::string
50 KM_NO_COPY_CONSTRUCT(IntPrinter);
58 IntPrinter(const char* format, T value) {
61 snprintf(m_strbuf, SIZE, m_format, value);
64 inline operator const char*() { return m_strbuf; }
65 inline const char* c_str() { return m_strbuf; }
66 inline const char* set_value(T value) {
67 snprintf(m_strbuf, SIZE, m_format, value);
72 struct i8Printer : public IntPrinter<i8_t> {
73 i8Printer(i8_t value) : IntPrinter<i8_t>("%hd", value) {}
76 struct ui8Printer : public IntPrinter<ui8_t> {
77 ui8Printer(ui8_t value) : IntPrinter<ui8_t>("%hu", value) {}
80 struct i16Printer : public IntPrinter<i16_t> {
81 i16Printer(i16_t value) : IntPrinter<i16_t>("%hd", value) {}
84 struct ui16Printer : public IntPrinter<ui16_t> {
85 ui16Printer(ui16_t value) : IntPrinter<ui16_t>("%hu", value) {}
88 struct i32Printer : public IntPrinter<i32_t> {
89 i32Printer(i32_t value) : IntPrinter<i32_t>("%d", value) {}
92 struct ui32Printer : public IntPrinter<ui32_t> {
93 ui32Printer(ui32_t value) : IntPrinter<ui32_t>("%u", value) {}
97 struct i64Printer : public IntPrinter<i64_t, 32> {
98 i64Printer(i64_t value) : IntPrinter<i64_t, 32>("%I64d", value) {}
101 struct ui64Printer : public IntPrinter<ui64_t, 32> {
102 ui64Printer(ui64_t value) : IntPrinter<ui64_t, 32>("%I64u", value) {}
105 struct i64Printer : public IntPrinter<i64_t, 32> {
106 i64Printer(i64_t value) : IntPrinter<i64_t, 32>("%qd", value) {}
109 struct ui64Printer : public IntPrinter<ui64_t, 32> {
110 ui64Printer(ui64_t value) : IntPrinter<ui64_t, 32>("%qu", value) {}
114 // Convert NULL-terminated UTF-8 hexadecimal string to binary, returns 0 if
115 // the binary buffer was large enough to hold the result. The output parameter
116 // 'char_count' will contain the length of the converted string. If the output
117 // buffer is too small or any of the pointer arguments are NULL, the subroutine
118 // will return -1 and set 'char_count' to the required buffer size. No data will
119 // be written to 'buf' if the subroutine fails.
120 i32_t hex2bin(const char* str, byte_t* buf, ui32_t buf_len, ui32_t* char_count);
122 // Convert a binary string to NULL-terminated UTF-8 hexadecimal, returns the buffer
123 // if the output buffer was large enough to hold the result. If the output buffer
124 // is too small or any of the pointer arguments are NULL, the subroutine will
127 const char* bin2hex(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
129 const char* bin2UUIDhex(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
131 // same as above for base64 text
132 i32_t base64decode(const char* str, byte_t* buf, ui32_t buf_len, ui32_t* char_count);
133 const char* base64encode(const byte_t* bin_buf, ui32_t bin_len, char* str_buf, ui32_t str_len);
135 // returns the length of a Base64 encoding of a buffer of the given length
136 inline ui32_t base64_encode_length(ui32_t length) {
137 while ( ( length % 3 ) != 0 )
140 return ( length / 3 ) * 4;
143 // print buffer contents to a stream as hexadecimal values in numbered
144 // rows of 16-bytes each.
146 void hexdump(const byte_t* buf, ui32_t dump_len, FILE* stream = 0);
148 // Return the length in bytes of a BER encoded value
149 inline ui32_t BER_length(const byte_t* buf)
151 if ( buf == 0 || (*buf & 0xf0) != 0x80 )
154 return (*buf & 0x0f) + 1;
157 // Return the BER length required to encode value. A return value of zero
158 // indicates a value too large for this library.
159 ui32_t get_BER_length_for_value(ui64_t valuse);
162 bool read_BER(const byte_t* buf, ui64_t* val);
164 // decode a ber value and compare it to a test value
165 bool read_test_BER(byte_t **buf, ui64_t test_value);
167 // create BER encoding of integer value
168 bool write_BER(byte_t* buf, ui64_t val, ui32_t ber_len = 0);
170 //----------------------------------------------------------------
173 // an abstract base class that objects implement to serialize state
174 // to and from a binary stream.
178 virtual ~IArchive(){}
179 virtual bool HasValue() const = 0;
180 virtual ui32_t ArchiveLength() const = 0;
181 virtual bool Archive(MemIOWriter* Writer) const = 0;
182 virtual bool Unarchive(MemIOReader* Reader) = 0;
187 class ArchivableList : public std::list<T>, public IArchive
191 virtual ~ArchivableList() {}
193 bool HasValue() const { return ! this->empty(); }
195 ui32_t ArchiveLength() const
197 ui32_t arch_size = sizeof(ui32_t);
199 typename ArchivableList<T>::const_iterator i = this->begin();
200 for ( ; i != this->end(); i++ )
201 arch_size += i->ArchiveLength();
206 bool Unarchive(Kumu::MemIOReader* Reader)
208 if ( Reader == 0 ) return false;
209 ui32_t read_size = 0;
210 if ( ! Reader->ReadUi32BE(&read_size) ) return false;
211 for ( ui32_t i = 0; i < read_size; i++ )
214 if ( ! TmpTP.Unarchive(Reader) ) return false;
215 this->push_back(TmpTP);
221 bool Archive(Kumu::MemIOWriter* Writer) const
223 if ( Writer == 0 ) return false;
224 if ( ! Writer->WriteUi32BE(this->size()) ) return false;
225 typename ArchivableList<T>::const_iterator i = this->begin();
226 for ( ; i != this->end(); i++ )
227 if ( ! i->Archive(Writer) ) return false;
234 // the base of all identifier classes, Identifier is not usually used directly
235 // see UUID and SymmetricKey below for more detail.
237 template <ui32_t SIZE>
238 class Identifier : public IArchive
242 byte_t m_Value[SIZE];
245 Identifier() : m_HasValue(false) { memset(m_Value, 0, SIZE); }
246 Identifier(const byte_t* value) : m_HasValue(true) { memcpy(m_Value, value, SIZE); }
247 Identifier(const Identifier& rhs) : IArchive() {
248 m_HasValue = rhs.m_HasValue;
249 memcpy(m_Value, rhs.m_Value, SIZE);
252 virtual ~Identifier() {}
254 const Identifier& operator=(const Identifier& rhs) {
255 m_HasValue = rhs.m_HasValue;
256 memcpy(m_Value, rhs.m_Value, SIZE);
260 inline void Set(const byte_t* value) { m_HasValue = true; memcpy(m_Value, value, SIZE); }
261 inline void Reset() { m_HasValue = false; memset(m_Value, 0, SIZE); }
262 inline const byte_t* Value() const { return m_Value; }
263 inline ui32_t Size() const { return SIZE; }
265 inline bool operator<(const Identifier& rhs) const {
266 ui32_t test_size = xmin(rhs.Size(), SIZE);
268 for ( ui32_t i = 0; i < test_size; i++ )
270 if ( m_Value[i] != rhs.m_Value[i] )
271 return m_Value[i] < rhs.m_Value[i];
277 inline bool operator==(const Identifier& rhs) const {
278 if ( rhs.Size() != SIZE ) return false;
279 return ( memcmp(m_Value, rhs.m_Value, SIZE) == 0 );
282 inline bool operator!=(const Identifier& rhs) const {
283 if ( rhs.Size() != SIZE ) return true;
284 return ( memcmp(m_Value, rhs.m_Value, SIZE) != 0 );
287 inline bool DecodeHex(const char* str) {
289 m_HasValue = ( hex2bin(str, m_Value, SIZE, &char_count) == 0 );
290 if ( m_HasValue && char_count != SIZE )
295 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
296 return bin2hex(m_Value, SIZE, buf, buf_len);
299 inline const char* EncodeString(char* str_buf, ui32_t buf_len) const {
300 return EncodeHex(str_buf, buf_len);
303 inline bool DecodeBase64(const char* str) {
305 m_HasValue = ( base64decode(str, m_Value, SIZE, &char_count) == 0 );
306 if ( m_HasValue && char_count != SIZE )
311 inline const char* EncodeBase64(char* buf, ui32_t buf_len) const {
312 return base64encode(m_Value, SIZE, buf, buf_len);
315 inline bool HasValue() const { return m_HasValue; }
317 inline ui32_t ArchiveLength() const { return SIZE; }
319 inline bool Unarchive(Kumu::MemIOReader* Reader) {
320 m_HasValue = Reader->ReadRaw(m_Value, SIZE);
324 inline bool Archive(Kumu::MemIOWriter* Writer) const {
325 return Writer->WriteRaw(m_Value, SIZE);
332 const ui32_t UUID_Length = 16;
333 class UUID : public Identifier<UUID_Length>
337 UUID(const byte_t* value) : Identifier<UUID_Length>(value) {}
338 UUID(const UUID& rhs) : Identifier<UUID_Length>(rhs) {}
341 inline const char* EncodeString(char* buf, ui32_t buf_len) const {
342 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
345 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
346 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
350 void GenRandomUUID(byte_t* buf); // buf must be UUID_Length or longer
351 void GenRandomValue(UUID&);
353 typedef ArchivableList<UUID> UUIDList;
355 // a self-wiping key container
357 const ui32_t SymmetricKey_Length = 16;
358 const byte_t NilKey[SymmetricKey_Length] = {
359 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce,
360 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce
363 class SymmetricKey : public Identifier<SymmetricKey_Length>
367 SymmetricKey(const byte_t* value) : Identifier<SymmetricKey_Length>(value) {}
368 SymmetricKey(const UUID& rhs) : Identifier<SymmetricKey_Length>(rhs) {}
369 virtual ~SymmetricKey() { memcpy(m_Value, NilKey, 16); m_HasValue = false; }
372 void GenRandomValue(SymmetricKey&);
375 // 2004-05-01T13:20:00+00:00
376 const ui32_t DateTimeLen = 25; // the number of chars in the xs:dateTime format (sans milliseconds)
378 // UTC time+date representation
379 class Timestamp : public IArchive
390 Timestamp(const Timestamp& rhs);
391 Timestamp(const char* datestr);
392 virtual ~Timestamp();
394 const Timestamp& operator=(const Timestamp& rhs);
395 bool operator<(const Timestamp& rhs) const;
396 bool operator>(const Timestamp& rhs) const;
397 bool operator==(const Timestamp& rhs) const;
398 bool operator!=(const Timestamp& rhs) const;
400 // Write the timestamp value to the given buffer in the form 2004-05-01T13:20:00+00:00
401 // returns 0 if the buffer is smaller than DateTimeLen
402 const char* EncodeString(char* str_buf, ui32_t buf_len) const;
403 const char* EncodeStringWithOffset(char* str_buf, ui32_t buf_len,
404 i32_t offset_minutes = 0) const;
406 // decode and set value from string formatted by EncodeString
407 bool DecodeString(const char* datestr);
409 // Add the given number of days, hours, minutes, or seconds to the timestamp value.
410 // Values less than zero will cause the timestamp to decrease
412 void AddHours(i32_t);
413 void AddMinutes(i32_t);
414 void AddSeconds(i32_t);
416 // Read and write the timestamp value as a byte string having
417 // the following format:
418 // | 16 bits int, big-endian | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
419 // | Year A.D | Month(1-12) | Day(1-31) | Hour(0-23) | Minute(0-59) | Second(0-59) |
421 virtual bool HasValue() const;
422 virtual ui32_t ArchiveLength() const { return 8L; }
423 virtual bool Archive(MemIOWriter* Writer) const;
424 virtual bool Unarchive(MemIOReader* Reader);
426 // Get the number of seconds since the Unix epoch (1970-01-01T00:00:00+00:00)
427 long GetSecondsSinceEpoch(void) const;
431 class ByteString : public IArchive
433 KM_NO_COPY_CONSTRUCT(ByteString);
436 byte_t* m_Data; // pointer to memory area containing frame data
437 ui32_t m_Capacity; // size of memory area pointed to by m_Data
438 ui32_t m_Length; // length of byte string in memory area pointed to by m_Data
442 ByteString(ui32_t cap);
443 virtual ~ByteString();
445 // Sets or resets the size of the internally allocated buffer.
446 Result_t Capacity(ui32_t cap);
448 Result_t Append(const ByteString&);
449 Result_t Append(const byte_t* buf, ui32_t buf_len);
451 // returns the size of the buffer
452 inline ui32_t Capacity() const { return m_Capacity; }
454 // returns a const pointer to the essence data
455 inline const byte_t* RoData() const { assert(m_Data); return m_Data; }
457 // returns a non-const pointer to the essence data
458 inline byte_t* Data() { assert(m_Data); return m_Data; }
460 // set the length of the buffer's contents
461 inline ui32_t Length(ui32_t l) { return m_Length = l; }
463 // returns the length of the buffer's contents
464 inline ui32_t Length() const { return m_Length; }
466 // copy the given data into the ByteString, set Length value.
467 // Returns error if the ByteString is too small.
468 Result_t Set(const byte_t* buf, ui32_t buf_len);
469 Result_t Set(const ByteString& Buf);
471 inline virtual bool HasValue() const { return m_Length > 0; }
473 inline virtual ui32_t ArchiveLength() const { return m_Length; }
475 inline virtual bool Archive(MemIOWriter* Writer) const {
477 if ( ! Writer->WriteUi32BE(m_Length) ) return false;
478 if ( ! Writer->WriteRaw(m_Data, m_Length) ) return false;
482 inline virtual bool Unarchive(MemIOReader* Reader) {
485 if ( ! Reader->ReadUi32BE(&tmp_len) ) return false;
486 if ( KM_FAILURE(Capacity(tmp_len)) ) return false;
487 if ( ! Reader->ReadRaw(m_Data, tmp_len) ) return false;
496 #endif // _KM_UTIL_H_