C file input/output: Difference between revisions

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{{short description|Input/output functionality in the C programming language}}

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{{C Standard Library}}

The [[C (programming language)|C programming language]] provides many [[standard library]] [[subroutine|functions]] for [[computer file|file]] [[input/output|input and output]]. These functions make up the bulk of the [[C standard library]] [[header file|header]] {{mono|<stdio.h>}}.<ref>{{cite book |url=http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf |title=ISO/IEC 9899:1999 specification |at=p. 274, § 7.19}}</ref> The functionality descends from a "portable I/O package" written by [[Mike Lesk]] at Bell Labs in the early 1970s,<ref>{{cite book |last1=Kernighan |first1=Brian |author-link1=Brian Kernighan |last2=Pike |first2=Rob |author-link2=Rob Pike |title=[[The UNIX Programming Environment]] |publisher=[[Prentice Hall]] |___location=[[Englewood Cliffs]] |year=1984 |page=200}}</ref> and officially became part of the [[Unix]] operating system in [[Version 7 Unix|Version 7]].<ref name="reader">{{cite techreport |first1=M. D. |last1=McIlroy |author-link1=Doug McIlroy |year=1987 |url=http://www.cs.dartmouth.edu/~doug/reader.pdf |title=A Research Unix reader: annotated excerpts from the Programmer's Manual, 1971–1986 |series=CSTR |number=139 |institution=Bell Labs}}</ref>

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Several alternatives to {{mono|stdio}} have been developed. Among these is the [[Input/output (C++)|C++ {{mono|iostream}}]] library, part of the [[ISO C++|ISO C++ standard]]. ISO C++ still requires the {{mono|stdio}} functionality.

Other alternatives include the SFIO<ref>{{Cite web |url=http://akpublic.research.att.com/sw/tools/sfio/ |title=SFIO: A Safe/Fast I/O Library |access-date=16 March 2021 |archive-date=11 February 2006 |archive-url=https://web.archive.org/web/20060211021834/http://akpublic.research.att.com/sw/tools/sfio/ |url-status=bot: unknown }}</ref> (A Safe/Fast I/O Library) library from [[AT&T Bell Laboratories]]. This library, introduced in 1991, aimed to avoid inconsistencies, unsafe practices and inefficiencies in the design of {{mono|stdio}}. Among its features is the possibility to insert [[callback function]]s into a stream to customize the handling of data read from or written to the stream.<ref>{{cite conference |title=SFIO: Safe/Fast String/File IO |first1=David G. |last1=Korn |author-link=David Korn (computer scientist) |first2=Kiem-Phong |last2=Vo |conference=Proc. Summer USENIX Conf. |year=1991 |citeseerx=10.1.1.51.6574}}</ref> It was released to the outside world in 1997, and the last release was February 1, February 2005.<ref>{{cite conference |first1=Glenn S. |last1=Fowler |first2=David G. |last2=Korn |first3=Kiem-Phong |last3=Vo |title=Extended Formatting with Sfio |conference=Proc. Summer USENIX Conf. |year=2000}}</ref>

==See also==

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==External links==

{{wikibooks|C Programming|C file input and output|C Programming/C Reference}}

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{{CProLang}}

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{{DEFAULTSORT:C file input output}}