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1 perry 1 FREAD
2 !!!FREAD
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 CONFORMING TO
8 SEE ALSO
9 ----
10 !!NAME
11
12
13 fread, fwrite - binary stream input/output
14 !!SYNOPSIS
15
16
17 __#include __
18
19
2 JimSmith 20 __size_t fread( void *__''ptr''__, size_t__ ''size''__, size_t__ ''nmemb''__, FILE *__''stream''__);__%%%
21 __size_t fwrite( const void *__''ptr''__, size_t__ ''size''__, size_t__ ''nmemb''__, FILE *__''stream''__);__
1 perry 22 !!DESCRIPTION
23
24
25 The function __fread__ reads ''nmemb'' elements of
26 data, each ''size'' bytes long, from the stream pointed
27 to by ''stream'', storing them at the location given by
28 ''ptr''.
29
30
31 The function __fwrite__ writes ''nmemb'' elements of
32 data, each ''size'' bytes long, to the stream pointed to
33 by ''stream'', obtaining them from the location given by
34 ''ptr''.
35 !!RETURN VALUE
36
37
38 __fread__ and __fwrite__ return the number of items
39 successfully read or written (i.e., not the number of
40 characters). If an error occurs, or the end-of-file is
41 reached, the return value is a short item count (or
42 zero).
43
44
45 __fread__ does not distinguish between end-of-file and
46 error, and callers must use feof(3) and
47 ferror(3) to determine which occurred.
48 !!CONFORMING TO
49
50
51 The functions __fread__ and __fwrite__ conform to ANSI
52 X3.159-1989 (``ANSI C'').
53 !!SEE ALSO
54
55
56 feof(3), ferror(3), read(2),
57 write(2)
58 ----
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