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c++ Programming Glossary: bithttp://stackoverflow.com/questions/146452/what-are-pod-types-in-c are POD types in C I've been following SO for a bit now and I've come across this term POD type a few times... what.. members functions. Wikipedias article on POD goes into a bit more detail and defines it as A Plain Old Data Structure in..
Best way to detect integer overflow in C/C++ http://stackoverflow.com/questions/199333/best-way-to-detect-integer-overflow-in-c-c overflow using the positions of the most significant one bits in the operands and a little basic binary math knowledge. For.. For addition any two operands will result in at most one bit more than the largest operand's highest one bit. For example.. most one bit more than the largest operand's highest one bit. For example bool addition_is_safe uint32_t a uint32_t b size_t..
Is there a performance difference between i++ and ++i in C++? http://stackoverflow.com/questions/24901/is-there-a-performance-difference-between-i-and-i-in-c have a specific reason to use i . For C the answer is a bit more complicated. If i is a simple type not an instance of a..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom constructor to make the copy and never need to repeat any bit of it. Now that the copy is made we are ready to swap. Observe..
When should static_cast, dynamic_cast and reinterpret_cast be used? http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used It's used primarily for particularly weird conversions and bit manipulations like turning a raw data stream into actual data.. data stream into actual data or storing data in the low bits of an aligned pointer. C casts are casts using type object..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points improve this question Disclaimer Okay. This answer is a bit long. So have patience while reading it. If you already know..
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special value initialized. This definition is imprecise and a bit incorrect but it should give you the basic idea. A reference.. unions out on the same grounds as above and rephrase in a bit clearer way An aggregate class is called a POD if it has no.. structs. Unlike them POD's can have member functions and arbitrary static members but neither of these two change the memory..
http://stackoverflow.com/questions/4421706/operator-overloading valid object of T found in stream is.setstate std ios failbit return is When implementing operator manually setting the stream.. code when changing a type so it is better to make a habit of always using prefix increment unless postfix is explicitly.. giving for operator taking its argument per copy. The bit manipulation operators ~ ^ should be implemented in the same..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c of type T . Indexing operator Since the syntax x i is a bit clumsy C provides the alternative syntax x i std cout x 3 x.. my taste and it also makes template argument deduction a bit harder for the compiler because in that case the first argument..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers a fantastic answer from Sven Groot which combined with a bit of SFINAE type traiting appears to solve the problem in a completely..
Why is iostream::eof inside a loop condition considered wrong? http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong data oh crap now we read the end and only now the eof bit will be set as well as the fail bit do stuff with now uninitialized.. and only now the eof bit will be set as well as the fail bit do stuff with now uninitialized data Against this int data while..
http://stackoverflow.com/questions/589575/size-of-int-long-etc C types. I know that it depends on the architecture 16 bits 32 bits 64 bits and the compiler. But are there any standards.. I know that it depends on the architecture 16 bits 32 bits 64 bits and the compiler. But are there any standards for C.. that it depends on the architecture 16 bits 32 bits 64 bits and the compiler. But are there any standards for C I'm using..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope whatever. I thought it might be germane to update this a bit with a few more technical thoughts. Compilers are in the business..
C/C++: Force Bit Field Order and Alignment http://stackoverflow.com/questions/1490092/c-c-force-bit-field-order-and-alignment C Force Bit Field Order and Alignment I read that the order of bit fields..
http://stackoverflow.com/questions/15729765/why-does-the-output-of-applied-on-a-negative-number-is-filled-with-ones-on-th Important is fills leftmost sign bit Most Significant Bit MSB to leftmost bit the after shift. This is called sign extension..
http://stackoverflow.com/questions/1604968/what-does-this-c-code-mean the standard C 0x draft n2914 explains this in detail. 9.6 Bit fields class.bit A member declarator of the form identifier.. Alignment of bit fields is implementation defined. Bit fields are packed into some addressable allocation unit. Note.. allocation units on some machines and not on others. Bit fields are assigned right to left on some machines left to right..
Branchless code that maps zero, negative, and positive to 0, 1, 2 http://stackoverflow.com/questions/1610836/branchless-code-that-maps-zero-negative-and-positive-to-0-1-2 question int Compare int x int y return x y y x 1 Edit Bitwise only Guess and don't count then int Compare int x int y.. the can be replaced with depending on which is faster... Bit twiddling is fun Hmm I just learned about setnz . I haven't..
What is the fastest integer division supporting division by zero no matter what the result is? http://stackoverflow.com/questions/16777456/what-is-the-fastest-integer-division-supporting-division-by-zero-no-matter-what should be fully C compatible main platforms are Linux 64 Bit with gcc clang and MacOS. c c optimization divide by zero ..
Compile for x64 with Visual Studio? http://stackoverflow.com/questions/2273146/compile-for-x64-with-visual-studio With Visual Studio 2005 2008 2010 how can I compile a 64 Bit application I have a 64 Bit Windows but by default VS seems.. 2010 how can I compile a 64 Bit application I have a 64 Bit Windows but by default VS seems to compile 32 bit executables.....
When is it worthwhile to use bit fields? http://stackoverflow.com/questions/4240974/when-is-it-worthwhile-to-use-bit-fields all R c c bit fields share improve this question Bit fields are typically only used when there's a need to map structure..
http://stackoverflow.com/questions/4604130/c-c-bit-array-or-bit-vector C Bit Array or Bit Vector I am learning C C programming have encountered.. C Bit Array or Bit Vector I am learning C C programming have encountered the usage.. am learning C C programming have encountered the usage of 'Bit arrays' or 'Bit Vectors'. Am not able to understand their purpose..
Is the value of RAND_MAX always (2^n)-1? http://stackoverflow.com/questions/4945698/is-the-value-of-rand-max-always-2n-1 fractional value so I think I can safely discount those. Bit fiddling doesn't normally bother me but I keep thinking the..
Free C/C++ IDE for Windows 7 that works with GCC [closed] http://stackoverflow.com/questions/5429381/free-c-c-ide-for-windows-7-that-works-with-gcc I've learned C and C in Borland's Turbo C IDE the 16 Bit version with that old blue screen background in which I started..
http://stackoverflow.com/questions/601558/multithreading-reference Multithreaded Programming Guide Multithreading Tutorial 64 Bit Programming with Visual C How to Create and Terminate Threads..
Add and Subtract 128 Bit Integers in C(++) http://stackoverflow.com/questions/741301/add-and-subtract-128-bit-integers-in-c and Subtract 128 Bit Integers in C I'm writing a compressor for a long stream of..
Position of least significant bit that is set http://stackoverflow.com/questions/757059/position-of-least-significant-bit-that-is-set be 4. A trivial implementation is this unsigned GetLowestBitPos unsigned value assert value 0 handled separately unsigned.. optimization bit twiddling share improve this question Bit Twiddling Hacks offers an excellent collection of er bit twiddling.. v int r result goes here static const int MultiplyDeBruijnBitPosition 32 0 1 28 2 29 14 24 3 30 22 20 15 25 17 4 8 31 27 13..
Uses for negative zero floating point value? http://stackoverflow.com/questions/7946913/uses-for-negative-zero-floating-point-value Elementary Functions or Much Ado About Nothing's Sign Bit by W. Kahan that is available for download here . One example..
Why use Precompiled Headers (C/C++)? http://stackoverflow.com/questions/903228/why-use-precompiled-headers-c-c #include times.h #include exec.h #include uZip.h 64 Bit support #include disable64.h c precompiled headers share..
http://stackoverflow.com/questions/14932315/how-to-compile-qt-5-under-windows-or-linux-32-or-64-bit-static-or-dynamic-on-v FOR VISUAL STUDIO EXPRESS DO NOT SELECT amd64 FOR 64 BIT IT WON'T WORK CHOOSE x86_amd64 INSTEAD Click OK. Now just open..
Define BIT0, BIT1, BIT2, etc Without #define http://stackoverflow.com/questions/3199761/define-bit0-bit1-bit2-etc-without-define BIT0 BIT1 BIT2 etc Without #define Is it possible in C to define.. BIT0 BIT1 BIT2 etc Without #define Is it possible in C to define BIT0.. BIT0 BIT1 BIT2 etc Without #define Is it possible in C to define BIT0 BIT1..
Problem to Decode H264 video over RTP with ffmpeg (libavcodec) http://stackoverflow.com/questions/3493742/problem-to-decode-h264-video-over-rtp-with-ffmpeg-libavcodec One fragment can look like this Fragment that has START BIT 1 First byte 3 NAL UNIT BITS 5 FRAGMENT TYPE BITS Second byte.. this Fragment that has START BIT 1 First byte 3 NAL UNIT BITS 5 FRAGMENT TYPE BITS Second byte START BIT END BIT RESERVED.. has START BIT 1 First byte 3 NAL UNIT BITS 5 FRAGMENT TYPE BITS Second byte START BIT END BIT RESERVED BIT 5 NAL UNIT BITS..
Floating Point to Binary Value(C++) http://stackoverflow.com/questions/474007/floating-point-to-binary-valuec data data.input 2.25125 std bitset sizeof float CHAR_BIT bits data.output std cout bits std endl or std cout BIT 4 bits.. bits data.output std cout bits std endl or std cout BIT 4 bits 4 std endl std cout BIT 7 bits 7 std endl It may not.. bits std endl or std cout BIT 4 bits 4 std endl std cout BIT 7 bits 7 std endl It may not be an array but you can access..
fastest way to write a bitstream on modern x86 hardware http://stackoverflow.com/questions/5704597/fastest-way-to-write-a-bitstream-on-modern-x86-hardware code. unsigned char membuff unsigned bit_pos current BIT position in the buffer so it's max size is 512Mb input bit buffer.. byte_offset bits bit_pos 0xF bit_pos bit_cnt return bits BIT_MASKS bit_cnt output buffer the whole destination should be..
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