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Header fields are colon-separated key-value pairs in clear-text string format, terminated by a carriage return (CR) and line feed (LF) character sequence. The end of the header section is indicated by an empty field line, resulting in the transmission of two consecutive CR-LF pairs.
Pages in category "C (programming language) headers" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
Pages in category "C standard library headers" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. A. Assert.h; E.
The POSIX standard added several nonstandard C headers for Unix-specific functionality. Many have found their way to other architectures. Examples include fcntl.h and unistd.h. A number of other groups are using other nonstandard headers – the GNU C Library has alloca.h, and OpenVMS has the va_count() function.
It was developed at the same time as the ANSI C standard. Some effort was made to make POSIX compatible with standard C; POSIX includes additional functions to those introduced in standard C. On the other hand, the 5 headers that were added to the C standard library with C11, were not likewise included in subsequent revisions of POSIX.
The <inttypes.h> header (cinttypes in C++) provides features that enhance the functionality of the types defined in the <stdint.h> header. It defines macros for printf format string and scanf format string specifiers corresponding to the types defined in <stdint.h> and several functions for working with the intmax_t and uintmax_t types.
The C programming language provides many standard library functions for file input and output.These functions make up the bulk of the C standard library header <stdio.h>. [1] The functionality descends from a "portable I/O package" written by Mike Lesk at Bell Labs in the early 1970s, [2] and officially became part of the Unix operating system in Version 7.
Headers; An empty line; Optional HTTP message body data; The request/status line and headers must all end with <CR><LF> (that is, a carriage return followed by a line feed). The empty line must consist of only <CR><LF> and no other whitespace. The "optional HTTP message body data" is what this article defines.