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[linuxjm/LDP_man-pages.git] / release / man3 / fmemopen.3

.\" Copyright 2005 walter harms (walter.harms@informatik.uni-oldenburg.de),
.\" and Copyright 2005 Michael Kerrisk <mtk.manpages@gmail.com>
.\" Distributed under the GPL.
.\" 2008-12-04, Petr Baudis <pasky@suse.cz>: Document open_wmemstream()
.\"
.\" Japanese Version Copyright (c) 2005, 2006 Akihiro MOTOKI
.\"                     all rights reserved.
.\" Translated 2005-12-26, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2006-01-20, Akihiro MOTOKI
.\" Updated 2006-07-20, Akihiro MOTOKI
.\" Updated 2008-11-08, Akihiro MOTOKI, LDP v3.13
.\" Updated 2010-04-18, Akihiro MOTOKI, LDP v3.24
.\"
.TH FMEMOPEN 3 2009-09-15 "GNU" "Linux Programmer's Manual"
.SH ̾Á°
fmemopen, open_memstream, open_wmemstream \-  ¥á¥â¥ê¤ò¥¹¥È¥ê¡¼¥à¤È¤·¤Æ¥ª¡¼¥×¥ó¤¹¤ë
.SH ½ñ¼°
.nf
.B #define _GNU_SOURCE
.B #include <stdio.h>

.BI "FILE *fmemopen(void *"buf ", size_t "size ", const char *" mode ");"

.BI "FILE *open_memstream(char **" ptr ", size_t *" sizeloc );

.B #define _GNU_SOURCE
.B #include <wchar.h>

.BI "FILE *open_wmemstream(wchar_t **" ptr ", size_t *" sizeloc );
.fi
.SH ÀâÌÀ
.BR fmemopen ()
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.I mode
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.B SEEK_END
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.\" See http://sourceware.org/bugzilla/show_bug.cgi?id=1995
.\" and
.\" http://sources.redhat.com/ml/libc-alpha/2006-04/msg00064.html
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.SH ÊÖ¤êÃÍ
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.BR open_memstream (),
.BR open_wmemstream ()
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.SH ¥Ð¡¼¥¸¥ç¥ó
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.BR open_wmemstream ()
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.SH ½àµò
POSIX.1-2008.
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.\" http://sourceware.org/bugzilla/show_bug.cgi?id=1996
.SH Îã
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.in +4n
.nf

.RB "$" " ./a.out \(aq1 23 43\(aq"
size=11; ptr=1 529 1849
.fi
.in
.SS ¥×¥í¥°¥é¥à¤Î¥½¡¼¥¹
\&
.nf
#define _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#define handle_error(msg) \\
    do { perror(msg); exit(EXIT_FAILURE); } while (0)

int
main(int argc, char *argv[])
{
    FILE *out, *in;
    int v, s;
    size_t size;
    char *ptr;

    if (argc != 2) {
        fprintf(stderr, "Usage: %s <file>\\n", argv[0]);
        exit(EXIT_FAILURE);
    }

    in = fmemopen(argv[1], strlen(argv[1]), "r");
    if (in == NULL)
        handle_error("fmemopen");

    out = open_memstream(&ptr, &size);
    if (out == NULL)
        handle_error("fmemopen");

    for (;;) {
        s = fscanf(in, "%d", &v);
        if (s <= 0)
            break;

        s = fprintf(out, "%d ", v * v);
        if (s == \-1)
            handle_error("fprintf");
    }
    fclose(in);
    fclose(out);
    printf("size=%ld; ptr=%s\\n", (long) size, ptr);
    free(ptr);
    exit(EXIT_SUCCESS);
}
.fi
.SH ´ØÏ¢¹àÌÜ
.BR fopen (3),
.BR fopencookie (3),
.BR feature_test_macros (7)