From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/io%2Fsetbuf.html | 46 ---------------------------------------------- 1 file changed, 46 deletions(-) delete mode 100644 devdocs/c/io%2Fsetbuf.html (limited to 'devdocs/c/io%2Fsetbuf.html') diff --git a/devdocs/c/io%2Fsetbuf.html b/devdocs/c/io%2Fsetbuf.html deleted file mode 100644 index fb5c4a93..00000000 --- a/devdocs/c/io%2Fsetbuf.html +++ /dev/null @@ -1,46 +0,0 @@ -

setbuf

Defined in header <stdio.h> 
void setbuf( FILE          *stream, char          *buffer );
-		 (until C99) 
void setbuf( FILE *restrict stream, char *restrict buffer );
-		 (since C99) 
#define BUFSIZ     /*unspecified*/
-

Sets the internal buffer to use for stream operations. It should be at least BUFSIZ characters long.

-

If buffer is not null, equivalent to setvbuf(stream, buffer, _IOFBF, BUFSIZ).

-

If buffer is null, equivalent to setvbuf(stream, NULL, _IONBF, 0), which turns off buffering.

-

Parameters

- - -
stream - the file stream to set the buffer to
buffer - pointer to a buffer for the stream to use. If a null pointer is supplied, the buffering is turned off

Return value

None.

-

Notes

If BUFSIZ is not the appropriate buffer size, setvbuf can be used to change it.

-

setvbuf should also be used to detect errors, since setbuf does not indicate success or failure.

-

This function may only be used after stream has been associated with an open file, but before any other operation (other than a failed call to setbuf/setvbuf).

-

A common error is setting the buffer of stdin or stdout to an array whose lifetime ends before the program terminates:

-
int main(void) {
-    char buf[BUFSIZ];
-    setbuf(stdin, buf);
-} // lifetime of buf ends, undefined behavior

Example

-

setbuf may be used to disable buffering on streams that require immediate output.

-
#include <stdio.h>
-#include <threads.h>
- 
-int main(void)
-{
-    setbuf(stdout, NULL); // unbuffered stdout
-    putchar('a'); // 'a' appears immediately if stdout is unbuffered
-    thrd_sleep(&(struct timespec){.tv_sec=1}, NULL); // sleep 1 sec
-    putchar('b'); 
-}

Output:

-
ab

References

See also

- -
sets the buffer and its size for a file stream
(function)
C++ documentation for setbuf
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/io/setbuf -

-
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