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/*
* fhist - file history and comparison tools
* Copyright (C) 2000 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate stdins
*/
#include <ac/stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <error_intl.h>
#include <input/private.h>
#include <input/stdin.h>
#include <str.h>
static string_ty *standard_input _((void));
static string_ty *
standard_input()
{
static string_ty *name;
sub_context_ty *scp;
if (!name)
{
scp = sub_context_new();
name = subst_intl(scp, i18n("standard input"));
sub_context_delete(scp);
}
return name;
}
static void destruct _((input_ty *));
static void
destruct(this)
input_ty *this;
{
}
static long iread _((input_ty *, void *, long));
static long
iread(this, data, len)
input_ty *this;
void *data;
long len;
{
long result;
if (len <= 0)
return 0;
result = fread(data, 1, len, stdin);
if (result <= 0 && ferror(stdin))
{
sub_context_ty *scp;
scp = sub_context_new();
sub_errno_set(scp);
sub_var_set_string(scp, "File_Name", standard_input());
fatal_intl(scp, i18n("read \"$filename\": $errno"));
/* NOTREACHED */
}
return result;
}
static int get _((input_ty *));
static int
get(this)
input_ty *this;
{
int c;
c = getchar();
if (c == EOF && ferror(stdin))
{
sub_context_ty *scp;
scp = sub_context_new();
sub_errno_set(scp);
sub_var_set_string(scp, "File_Name", standard_input());
fatal_intl(scp, i18n("read \"$filename\": $errno"));
/* NOTREACHED */
}
return c;
}
static long itell _((input_ty *));
static long
itell(this)
input_ty *this;
{
return ftell(stdin);
}
static const char *name _((input_ty *));
static const char *
name(this)
input_ty *this;
{
return standard_input()->str_text;
}
static long length _((input_ty *));
static long
length(this)
input_ty *this;
{
struct stat st;
if (fstat(fileno(stdin), &st) < 0)
return -1;
if (!S_ISREG(st.st_mode))
return -1;
return st.st_size;
}
static input_vtbl_ty vtbl =
{
sizeof(input_ty),
destruct,
iread,
get,
itell,
name,
length,
};
input_ty *
input_stdin()
{
return input_new(&vtbl);
}
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