Two groups could not agree by which end an egg should be opened -a- the little or the big. The term little and big endian came from Gulliver’s Travels by Jonathan Swift. Which one is better - little endian or big endian? Other file formats use some fixed endianness format e.g, JPEG files are stored in big endian format. Current version of these processors are bi-endians.įile formats which have 1 byte as a basic unit are independent of endianness e.g., ASCII files. PowerPC (by Motorola) and SPARK (by Sun) processors were big endian. Current generation ARM processors are bi-endian.
Intel based processors are little endians. What are the examples of little, big endian and bi-endian machines ? To make programs endianness independent, above programming style should be avoided.īi-endian processors can run in both modes little and big endian. When I run above program on little endian machine, I get 1 as output, while if I run it on a big endian machine I get 256.
In the above program, a char array is typecasted to an unsigned short integer type. Sometimes it matters when you are using type casting, below program is an example. Before transferring data on network, data is first converted to network byte order (big endian). Standard byte order for networks is big endian, also known as network byte order. You can find such a practical example here. Unless there is little endian to big endian transformation, big endian machine will read the file in reverse order. It matters in network programming: Suppose you write integers to file on a little endian machine and you transfer this file to a big-endian machine. Most of the times compiler takes care of endianness, however, endianness becomes an issue in following cases. If machine is little endian then *c will be 1 (because last byte is stored first) and if the machine is big endian then *c will be 0.
Since size of character is 1 byte when the character pointer is de-referenced it will contain only first byte of integer. In the above program, a character pointer c is pointing to an integer i. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.
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