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
8 1. Redistributions of source code must retain the above copyright
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;
233 // archivable version of std::string
236 class ArchivableString : public std::string, public Kumu::IArchive
240 ArchivableString() {}
241 ArchivableString(const char* sz) : std::string(sz) {}
242 ArchivableString(const std::string& s) : std::string(s) {}
243 virtual ~ArchivableString() {}
245 bool HasValue() const { return ! this->empty(); }
246 ui32_t ArchiveLength() const { return sizeof(ui32_t) + this->size(); }
248 bool Archive(MemIOWriter* Writer) const {
249 if ( Writer == 0 ) return false;
250 return Writer->WriteString(*this);
253 bool Unarchive(MemIOReader* Reader) {
254 if ( Reader == 0 ) return false;
255 return Reader->ReadString(*this);
260 typedef Kumu::ArchivableList<ArchivableString> StringList;
263 // the base of all identifier classes, Identifier is not usually used directly
264 // see UUID and SymmetricKey below for more detail.
266 template <ui32_t SIZE>
267 class Identifier : public IArchive
271 byte_t m_Value[SIZE];
274 Identifier() : m_HasValue(false) { memset(m_Value, 0, SIZE); }
275 Identifier(const byte_t* value) : m_HasValue(true) { memcpy(m_Value, value, SIZE); }
276 Identifier(const Identifier& rhs) : IArchive() {
277 m_HasValue = rhs.m_HasValue;
278 memcpy(m_Value, rhs.m_Value, SIZE);
281 virtual ~Identifier() {}
283 const Identifier& operator=(const Identifier& rhs) {
284 m_HasValue = rhs.m_HasValue;
285 memcpy(m_Value, rhs.m_Value, SIZE);
289 inline void Set(const byte_t* value) { m_HasValue = true; memcpy(m_Value, value, SIZE); }
290 inline void Reset() { m_HasValue = false; memset(m_Value, 0, SIZE); }
291 inline const byte_t* Value() const { return m_Value; }
292 inline ui32_t Size() const { return SIZE; }
294 inline bool operator<(const Identifier& rhs) const {
295 ui32_t test_size = xmin(rhs.Size(), SIZE);
297 for ( ui32_t i = 0; i < test_size; i++ )
299 if ( m_Value[i] != rhs.m_Value[i] )
300 return m_Value[i] < rhs.m_Value[i];
306 inline bool operator==(const Identifier& rhs) const {
307 if ( rhs.Size() != SIZE ) return false;
308 return ( memcmp(m_Value, rhs.m_Value, SIZE) == 0 );
311 inline bool operator!=(const Identifier& rhs) const {
312 if ( rhs.Size() != SIZE ) return true;
313 return ( memcmp(m_Value, rhs.m_Value, SIZE) != 0 );
316 inline bool DecodeHex(const char* str) {
318 m_HasValue = ( hex2bin(str, m_Value, SIZE, &char_count) == 0 );
319 if ( m_HasValue && char_count != SIZE )
324 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
325 return bin2hex(m_Value, SIZE, buf, buf_len);
328 inline const char* EncodeString(char* str_buf, ui32_t buf_len) const {
329 return EncodeHex(str_buf, buf_len);
332 inline bool DecodeBase64(const char* str) {
334 m_HasValue = ( base64decode(str, m_Value, SIZE, &char_count) == 0 );
335 if ( m_HasValue && char_count != SIZE )
340 inline const char* EncodeBase64(char* buf, ui32_t buf_len) const {
341 return base64encode(m_Value, SIZE, buf, buf_len);
344 inline bool HasValue() const { return m_HasValue; }
346 inline ui32_t ArchiveLength() const { return SIZE; }
348 inline bool Unarchive(Kumu::MemIOReader* Reader) {
349 m_HasValue = Reader->ReadRaw(m_Value, SIZE);
353 inline bool Archive(Kumu::MemIOWriter* Writer) const {
354 return Writer->WriteRaw(m_Value, SIZE);
361 const ui32_t UUID_Length = 16;
362 class UUID : public Identifier<UUID_Length>
366 UUID(const byte_t* value) : Identifier<UUID_Length>(value) {}
367 UUID(const UUID& rhs) : Identifier<UUID_Length>(rhs) {}
370 inline const char* EncodeString(char* buf, ui32_t buf_len) const {
371 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
374 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
375 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
379 void GenRandomUUID(byte_t* buf); // buf must be UUID_Length or longer
380 void GenRandomValue(UUID&);
382 typedef ArchivableList<UUID> UUIDList;
384 // a self-wiping key container
386 const ui32_t SymmetricKey_Length = 16;
387 const byte_t NilKey[SymmetricKey_Length] = {
388 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce,
389 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce
392 class SymmetricKey : public Identifier<SymmetricKey_Length>
396 SymmetricKey(const byte_t* value) : Identifier<SymmetricKey_Length>(value) {}
397 SymmetricKey(const UUID& rhs) : Identifier<SymmetricKey_Length>(rhs) {}
398 virtual ~SymmetricKey() { memcpy(m_Value, NilKey, 16); m_HasValue = false; }
401 void GenRandomValue(SymmetricKey&);
404 // 2004-05-01T13:20:00+00:00
405 const ui32_t DateTimeLen = 25; // the number of chars in the xs:dateTime format (sans milliseconds)
407 // UTC time+date representation
408 class Timestamp : public IArchive
419 Timestamp(const Timestamp& rhs);
420 Timestamp(const char* datestr);
421 virtual ~Timestamp();
423 const Timestamp& operator=(const Timestamp& rhs);
424 bool operator<(const Timestamp& rhs) const;
425 bool operator>(const Timestamp& rhs) const;
426 bool operator==(const Timestamp& rhs) const;
427 bool operator!=(const Timestamp& rhs) const;
429 // Write the timestamp value to the given buffer in the form 2004-05-01T13:20:00+00:00
430 // returns 0 if the buffer is smaller than DateTimeLen
431 const char* EncodeString(char* str_buf, ui32_t buf_len) const;
432 const char* EncodeStringWithOffset(char* str_buf, ui32_t buf_len,
433 i32_t offset_minutes = 0) const;
435 // decode and set value from string formatted by EncodeString
436 bool DecodeString(const char* datestr);
438 // Add the given number of days, hours, minutes, or seconds to the timestamp value.
439 // Values less than zero will cause the timestamp to decrease
441 void AddHours(i32_t);
442 void AddMinutes(i32_t);
443 void AddSeconds(i32_t);
445 // Read and write the timestamp value as a byte string having
446 // the following format:
447 // | 16 bits int, big-endian | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
448 // | Year A.D | Month(1-12) | Day(1-31) | Hour(0-23) | Minute(0-59) | Second(0-59) |
450 virtual bool HasValue() const;
451 virtual ui32_t ArchiveLength() const { return 8L; }
452 virtual bool Archive(MemIOWriter* Writer) const;
453 virtual bool Unarchive(MemIOReader* Reader);
455 // Get the number of seconds since the Unix epoch (1970-01-01T00:00:00+00:00)
456 long GetSecondsSinceEpoch(void) const;
460 class ByteString : public IArchive
462 KM_NO_COPY_CONSTRUCT(ByteString);
465 byte_t* m_Data; // pointer to memory area containing frame data
466 ui32_t m_Capacity; // size of memory area pointed to by m_Data
467 ui32_t m_Length; // length of byte string in memory area pointed to by m_Data
471 ByteString(ui32_t cap);
472 virtual ~ByteString();
474 // Sets or resets the size of the internally allocated buffer.
475 Result_t Capacity(ui32_t cap);
477 Result_t Append(const ByteString&);
478 Result_t Append(const byte_t* buf, ui32_t buf_len);
480 // returns the size of the buffer
481 inline ui32_t Capacity() const { return m_Capacity; }
483 // returns a const pointer to the essence data
484 inline const byte_t* RoData() const { assert(m_Data); return m_Data; }
486 // returns a non-const pointer to the essence data
487 inline byte_t* Data() { assert(m_Data); return m_Data; }
489 // set the length of the buffer's contents
490 inline ui32_t Length(ui32_t l) { return m_Length = l; }
492 // returns the length of the buffer's contents
493 inline ui32_t Length() const { return m_Length; }
495 // copy the given data into the ByteString, set Length value.
496 // Returns error if the ByteString is too small.
497 Result_t Set(const byte_t* buf, ui32_t buf_len);
498 Result_t Set(const ByteString& Buf);
500 inline virtual bool HasValue() const { return m_Length > 0; }
502 inline virtual ui32_t ArchiveLength() const { return m_Length; }
504 inline virtual bool Archive(MemIOWriter* Writer) const {
506 if ( ! Writer->WriteUi32BE(m_Length) ) return false;
507 if ( ! Writer->WriteRaw(m_Data, m_Length) ) return false;
511 inline virtual bool Unarchive(MemIOReader* Reader) {
514 if ( ! Reader->ReadUi32BE(&tmp_len) ) return false;
515 if ( KM_FAILURE(Capacity(tmp_len)) ) return false;
516 if ( ! Reader->ReadRaw(m_Data, tmp_len) ) return false;
525 #endif // _KM_UTIL_H_