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/*
* cook - file construction tool
* Copyright (C) 1999 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 for reading input from files
*/
#include <error_intl.h>
#include <input/file.h>
#include <input/private.h>
#include <input/stdin.h>
#include <str.h>
#include <sub.h>
typedef struct input_file_ty input_file_ty;
struct input_file_ty
{
input_ty inherited;
FILE *fp;
string_ty *fn;
};
static void destruct _((input_ty *));
static void
destruct(p)
input_ty *p;
{
input_file_ty *this;
this = (input_file_ty *)p;
fclose_and_check(this->fp, this->fn->str_text);
str_free(this->fn);
this->fp = 0;
this->fn = 0;
}
static long iread _((input_ty *, void *, long));
static long
iread(p, data, len)
input_ty *p;
void *data;
long len;
{
input_file_ty *this;
long result;
if (len < 0)
return 0;
this = (input_file_ty *)p;
result = fread(data, (size_t)1, (size_t)len, this->fp);
if (result <= 0 && ferror(this->fp))
fatal_intl_read(this->fn->str_text);
return result;
}
static int get _((input_ty *));
static int
get(p)
input_ty *p;
{
input_file_ty *this;
int c;
this = (input_file_ty *)p;
c = getc(this->fp);
if (c == EOF)
{
if (ferror(this->fp))
fatal_intl_read(this->fn->str_text);
return INPUT_EOF;
}
return c;
}
static string_ty *filename _((input_ty *));
static string_ty *
filename(p)
input_ty *p;
{
input_file_ty *this;
this = (input_file_ty *)p;
return this->fn;
}
static input_vtbl_ty vtbl =
{
sizeof(input_file_ty),
destruct,
iread,
get,
filename,
};
input_ty *
input_file_open(fn)
string_ty *fn;
{
input_ty *result;
input_file_ty *this;
if (!fn)
return input_stdin();
result = input_new(&vtbl);
this = (input_file_ty *)result;
this->fp = fopen_and_check(fn->str_text, "rb");
this->fn = str_copy(fn);
return result;
}
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