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/*
* cook - file construction tool
* Copyright (C) 1999, 2001 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: interface definition for common/input.c
*/
#ifndef COMMON_INPUT_H
#define COMMON_INPUT_H
#include <main.h>
#define INPUT_EOF (-1)
typedef struct input_ty input_ty;
struct input_ty
{
struct input_vtbl_ty *vptr;
/* private: */
unsigned char *pushback_buf;
int pushback_len;
int pushback_max;
};
/*
* This structure is *not* to be accessed by clients of this interface.
* It is only present to permit optimizations.
*/
typedef struct input_vtbl_ty input_vtbl_ty;
struct input_vtbl_ty
{
int size;
void (*destruct)_((input_ty *));
long (*read)_((input_ty *, void *, long));
int (*get)_((input_ty *));
struct string_ty *(*filename)_((input_ty *));
};
long input_read _((input_ty *, void *, long));
int input_getc _((input_ty *));
void input_ungetc _((input_ty *, int));
struct string_ty *input_filename _((input_ty *));
void input_delete _((input_ty *));
void input_format_error _((input_ty *));
struct output_ty; /* existence */
void input_to_output _((input_ty *, struct output_ty *));
struct string_ty *input_one_line _((input_ty *));
#if 0 /* def __GNUC__ */
/*
* This optimization has been turned off because
* gcc-2.96 (rh7.0) 3 tests fail
* egcs-2.91.66 (rh7.0) no tests fail
*
* If you turn this optimization back on, you do so at your own risk.
* Remember to `make sure' before you install, if you do.
*/
extern __inline long input_read(input_ty *fp, void *data, long len)
{ if (len <= 0) return 0; if (fp->pushback_len > 0) {
fp->pushback_len--; *(char *)data = fp->pushback_buf[
fp->pushback_len ]; return 1; } return fp->vptr->read(fp, data, len); }
extern __inline int input_getc(input_ty *fp) { if (fp->pushback_len >
0) { fp->pushback_len--; return fp->pushback_buf[ fp->pushback_len
]; } return fp->vptr->get(fp); }
extern __inline struct string_ty *input_filename(input_ty *fp)
{ return fp->vptr->filename(fp); }
#else /* !__GNUC__ */
#ifdef DEBUG
#define input_filename(fp) ((fp)->vptr->filename(fp))
#endif /* DEBUG */
#endif /* !__GNUC__ */
#endif /* COMMON_INPUT_H */
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