getw, putw - input and output of words (ints)
#include <stdio.h>
int getw(FILE *stream);
int putw(int w, FILE *stream);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
getw(),
putw():
- Since glibc 2.3.3:
- _XOPEN_SOURCE && ! (_POSIX_C_SOURCE >= 200112L)
|| /* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
- Before glibc 2.3.3:
- _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE
getw() reads a word (that is, an
int) from
stream. It's
provided for compatibility with SVr4. We recommend you use
fread(3)
instead.
putw() writes the word
w (that is, an
int) to
stream. It is provided for compatibility with SVr4, but we recommend
you use
fwrite(3) instead.
Normally,
getw() returns the word read, and
putw() returns 0. On
error, they return
EOF.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| getw (), putw () |
Thread safety |
MT-Safe |
SVr4, SUSv2. Not present in POSIX.1.
The value returned on error is also a legitimate data value.
ferror(3)
can be used to distinguish between the two cases.
ferror(3),
fread(3),
fwrite(3),
getc(3),
putc(3)