2 Copyright (c) 2005-2015, 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 // 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(static_cast<ui32_t>(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) + static_cast<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 ui32_t test_size = xmin(rhs.Size(), SIZE);
309 for ( ui32_t i = 0; i < test_size; i++ )
311 if ( m_Value[i] != rhs.m_Value[i] )
312 return m_Value[i] > rhs.m_Value[i];
318 inline bool operator==(const Identifier& rhs) const {
319 if ( rhs.Size() != SIZE ) return false;
320 return ( memcmp(m_Value, rhs.m_Value, SIZE) == 0 );
323 inline bool operator!=(const Identifier& rhs) const {
324 if ( rhs.Size() != SIZE ) return true;
325 return ( memcmp(m_Value, rhs.m_Value, SIZE) != 0 );
328 inline bool DecodeHex(const char* str) {
330 m_HasValue = ( hex2bin(str, m_Value, SIZE, &char_count) == 0 );
331 if ( m_HasValue && char_count != SIZE )
336 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
337 return bin2hex(m_Value, SIZE, buf, buf_len);
340 inline const char* EncodeString(char* str_buf, ui32_t buf_len) const {
341 return EncodeHex(str_buf, buf_len);
344 inline bool DecodeBase64(const char* str) {
346 m_HasValue = ( base64decode(str, m_Value, SIZE, &char_count) == 0 );
347 if ( m_HasValue && char_count != SIZE )
352 inline const char* EncodeBase64(char* buf, ui32_t buf_len) const {
353 return base64encode(m_Value, SIZE, buf, buf_len);
356 inline bool HasValue() const { return m_HasValue; }
358 inline ui32_t ArchiveLength() const { return SIZE; }
360 inline bool Unarchive(Kumu::MemIOReader* Reader) {
361 m_HasValue = Reader->ReadRaw(m_Value, SIZE);
365 inline bool Archive(Kumu::MemIOWriter* Writer) const {
366 return Writer->WriteRaw(m_Value, SIZE);
373 const ui32_t UUID_Length = 16;
374 class UUID : public Identifier<UUID_Length>
378 UUID(const byte_t* value) : Identifier<UUID_Length>(value) {}
379 UUID(const UUID& rhs) : Identifier<UUID_Length>(rhs) {}
382 inline const char* EncodeString(char* buf, ui32_t buf_len) const {
383 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
386 inline const char* EncodeHex(char* buf, ui32_t buf_len) const {
387 return bin2UUIDhex(m_Value, Size(), buf, buf_len);
391 void GenRandomUUID(byte_t* buf); // buf must be UUID_Length or longer
392 void GenRandomValue(UUID&);
394 typedef ArchivableList<UUID> UUIDList;
396 // a self-wiping key container
398 const ui32_t SymmetricKey_Length = 16;
399 const byte_t NilKey[SymmetricKey_Length] = {
400 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce,
401 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce, 0xfa, 0xce
404 class SymmetricKey : public Identifier<SymmetricKey_Length>
408 SymmetricKey(const byte_t* value) : Identifier<SymmetricKey_Length>(value) {}
409 SymmetricKey(const UUID& rhs) : Identifier<SymmetricKey_Length>(rhs) {}
410 virtual ~SymmetricKey() { memcpy(m_Value, NilKey, 16); m_HasValue = false; }
413 void GenRandomValue(SymmetricKey&);
416 // 2004-05-01T13:20:00+00:00
417 const ui32_t DateTimeLen = 25; // the number of chars in the xs:dateTime format (sans milliseconds)
419 // UTC time+date representation
420 class Timestamp : public IArchive
422 TAI::tai m_Timestamp; // always UTC
423 i32_t m_TZOffsetMinutes;
427 Timestamp(const Timestamp& rhs);
428 Timestamp(const char* datestr);
429 Timestamp(const ui16_t& Year, const ui8_t& Month, const ui8_t& Day);
430 Timestamp(const ui16_t& Year, const ui8_t& Month, const ui8_t& Day,
431 const ui8_t& Hour, const ui8_t& Minute, const ui8_t& Second);
432 virtual ~Timestamp();
434 const Timestamp& operator=(const Timestamp& rhs);
435 bool operator<(const Timestamp& rhs) const;
436 bool operator>(const Timestamp& rhs) const;
437 bool operator==(const Timestamp& rhs) const;
438 bool operator!=(const Timestamp& rhs) const;
441 void GetComponents(ui16_t& Year, ui8_t& Month, ui8_t& Day,
442 ui8_t& Hour, ui8_t& Minute, ui8_t& Second) const;
443 void SetComponents(const ui16_t& Year, const ui8_t& Month, const ui8_t& Day,
444 const ui8_t& Hour, const ui8_t& Minute, const ui8_t& Second);
446 // Write the timestamp value to the given buffer in the form 2004-05-01T13:20:00+00:00
447 // returns 0 if the buffer is smaller than DateTimeLen
448 const char* EncodeString(char* str_buf, ui32_t buf_len) const;
450 // decode and set value from string formatted by EncodeString
451 bool DecodeString(const char* datestr);
453 // Add the given number of days, hours, minutes, or seconds to the timestamp value.
454 // Values less than zero will cause the timestamp to decrease
455 inline void AddDays(const i32_t& d) { m_Timestamp.add_days(d); }
456 inline void AddHours(const i32_t& h) { m_Timestamp.add_hours(h); }
457 inline void AddMinutes(const i32_t& m) { m_Timestamp.add_minutes(m); }
458 inline void AddSeconds(const i32_t& s) { m_Timestamp.add_seconds(s); }
460 // returns false if the requested adjustment is out of range
461 bool SetTZOffsetMinutes(const i32_t& minutes);
462 inline i32_t GetTZOffsetMinutes() const { return m_TZOffsetMinutes; }
464 // Return the number of seconds since the Unix epoch UTC (1970-01-01T00:00:00+00:00)
465 ui64_t GetCTime() const;
467 // Set internal time to the number of seconds since the Unix epoch UTC
468 void SetCTime(const ui64_t& ctime);
470 // Read and write the timestamp (always UTC) value as a byte string having
471 // the following format:
472 // | 16 bits int, big-endian | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
473 // | Year A.D | Month(1-12) | Day(1-31) | Hour(0-23) | Minute(0-59) | Second(0-59) |
475 virtual bool HasValue() const;
476 virtual ui32_t ArchiveLength() const { return 8L; }
477 virtual bool Archive(MemIOWriter* Writer) const;
478 virtual bool Unarchive(MemIOReader* Reader);
482 class ByteString : public IArchive
484 KM_NO_COPY_CONSTRUCT(ByteString);
487 byte_t* m_Data; // pointer to memory area containing frame data
488 ui32_t m_Capacity; // size of memory area pointed to by m_Data
489 ui32_t m_Length; // length of byte string in memory area pointed to by m_Data
493 ByteString(ui32_t cap);
494 virtual ~ByteString();
496 // Sets or resets the size of the internally allocated buffer.
497 Result_t Capacity(ui32_t cap);
499 Result_t Append(const ByteString&);
500 Result_t Append(const byte_t* buf, ui32_t buf_len);
502 // returns the size of the buffer
503 inline ui32_t Capacity() const { return m_Capacity; }
505 // returns a const pointer to the essence data
506 inline const byte_t* RoData() const { assert(m_Data); return m_Data; }
508 // returns a non-const pointer to the essence data
509 inline byte_t* Data() { assert(m_Data); return m_Data; }
511 // set the length of the buffer's contents
512 inline ui32_t Length(ui32_t l) { return m_Length = l; }
514 // returns the length of the buffer's contents
515 inline ui32_t Length() const { return m_Length; }
517 // copy the given data into the ByteString, set Length value.
518 // Returns error if the ByteString is too small.
519 Result_t Set(const byte_t* buf, ui32_t buf_len);
520 Result_t Set(const ByteString& Buf);
522 inline virtual bool HasValue() const { return m_Length > 0; }
524 inline virtual ui32_t ArchiveLength() const { return sizeof(ui32_t) + m_Length; }
526 inline virtual bool Archive(MemIOWriter* Writer) const {
528 if ( ! Writer->WriteUi32BE(m_Length) ) return false;
529 if ( ! Writer->WriteRaw(m_Data, m_Length) ) return false;
533 inline virtual bool Unarchive(MemIOReader* Reader) {
536 if ( ! Reader->ReadUi32BE(&tmp_len) ) return false;
537 if ( KM_FAILURE(Capacity(tmp_len)) ) return false;
538 if ( ! Reader->ReadRaw(m_Data, tmp_len) ) return false;
544 inline void hexdump(const ByteString& buf, FILE* stream = 0) {
545 hexdump(buf.RoData(), buf.Length(), stream);
548 // Locates the first occurrence of the null-terminated string s2 in the string s1, where not more
549 // than n characters are searched. Characters that appear after a `\0' character are not searched.
550 // Reproduced here from BSD for portability.
551 const char *km_strnstr(const char *s1, const char *s2, size_t n);
553 // Split the input string into tokens using the given separator. If the separator is not found the
554 // entire string will be returned as a single-item list. Empty items will be recorded for
555 // adjacent instances of the separator. E.g., "/foo//bar/" will return ["", "foo", "", "bar", ""].
556 std::list<std::string> km_token_split(const std::string& str, const std::string& separator);
558 // Join the tokens in the given list using delimiter. If prefix is defined then each token
559 // will be concatenated with the prefix before being added to the composite string.
562 km_join(const T& list, const std::string& delimiter, const std::string& prefix = "")
566 for ( typename T::const_iterator i = list.begin(); i != list.end(); ++i )
568 if ( i != list.begin() )
573 result += prefix + *i;
582 #endif // _KM_UTIL_H_