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/* input.h -- Structures and unions used for reading input. */
/* Copyright (C) 1993 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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, or (at your option) any later
version.
Bash 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 Bash; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if !defined (_INPUT_H_)
#define _INPUT_H_
#include "stdc.h"
/* Function pointers can be declared as (Function *)foo. */
#if !defined (_FUNCTION_DEF)
# define _FUNCTION_DEF
typedef int Function ();
typedef void VFunction ();
typedef char *CPFunction ();
typedef char **CPPFunction ();
#endif /* _FUNCTION_DEF */
enum stream_type {st_none, st_stdin, st_stream, st_string, st_bstream};
#if defined (BUFFERED_INPUT)
/* Possible values for b_flag. */
#undef B_EOF
#undef B_ERROR /* There are some systems with this define */
#undef B_UNBUFF
#define B_EOF 0x1
#define B_ERROR 0x2
#define B_UNBUFF 0x4
/* A buffered stream. Like a FILE *, but with our own buffering and
synchronization. Look in input.c for the implementation. */
typedef struct BSTREAM
{
int b_fd;
char *b_buffer; /* The buffer that holds characters read. */
size_t b_size; /* How big the buffer is. */
int b_used; /* How much of the buffer we're using, */
int b_flag; /* Flag values. */
int b_inputp; /* The input pointer, index into b_buffer. */
} BUFFERED_STREAM;
#if 0
extern BUFFERED_STREAM **buffers;
#endif
extern int default_buffered_input;
#endif /* BUFFERED_INPUT */
typedef union {
FILE *file;
char *string;
#if defined (BUFFERED_INPUT)
int buffered_fd;
#endif
} INPUT_STREAM;
typedef struct {
enum stream_type type;
char *name;
INPUT_STREAM location;
Function *getter;
Function *ungetter;
} BASH_INPUT;
extern BASH_INPUT bash_input;
/* Functions from parse.y. */
extern void initialize_bash_input __P((void));
extern void init_yy_io __P((Function *, Function *, enum stream_type, char *, INPUT_STREAM));
extern void with_input_from_stdin __P((void));
extern void with_input_from_string __P((char *, char *));
extern void with_input_from_stream __P((FILE *, char *));
extern void push_stream __P((int));
extern void pop_stream __P((void));
extern int stream_on_stack __P((enum stream_type));
extern char *read_secondary_line __P((int));
extern int find_reserved_word __P((char *));
extern char *decode_prompt_string __P((char *));
extern void gather_here_documents __P((void));
extern void execute_prompt_command __P((char *));
/* Functions from input.c */
extern int getc_with_restart ();
extern int ungetc_with_restart ();
#if defined (BUFFERED_INPUT)
/* Functions from input.c. */
extern int check_bash_input __P((int));
extern int duplicate_buffered_stream __P((int, int));
extern BUFFERED_STREAM *fd_to_buffered_stream __P((int));
extern BUFFERED_STREAM *set_buffered_stream __P((int, BUFFERED_STREAM *));
extern BUFFERED_STREAM *open_buffered_stream __P((char *));
extern void free_buffered_stream __P((BUFFERED_STREAM *));
extern int close_buffered_stream __P((BUFFERED_STREAM *));
extern int close_buffered_fd __P((int));
extern int sync_buffered_stream __P((int));
extern int buffered_getchar __P((void));
extern int buffered_ungetchar __P((int));
extern void with_input_from_buffered_stream __P((int, char *));
#endif /* BUFFERED_INPUT */
#endif /* _INPUT_H_ */
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