1 /* input.h -- Structures and unions used for reading input. */
2 /* Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GNU Bash, the Bourne Again SHell.
6 Bash is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License along
17 with Bash; see the file COPYING. If not, write to the Free Software
18 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
20 #if !defined (_INPUT_H_)
25 /* Function pointers can be declared as (Function *)foo. */
26 #if !defined (_FUNCTION_DEF)
27 # define _FUNCTION_DEF
28 typedef int Function ();
29 typedef void VFunction ();
30 typedef char *CPFunction (); /* no longer used */
31 typedef char **CPPFunction (); /* no longer used */
32 #endif /* _FUNCTION_DEF */
34 typedef int sh_cget_func_t __P((void)); /* sh_ivoidfunc_t */
35 typedef int sh_cunget_func_t __P((int)); /* sh_intfunc_t */
37 enum stream_type {st_none, st_stdin, st_stream, st_string, st_bstream};
39 #if defined (BUFFERED_INPUT)
41 /* Possible values for b_flag. */
43 #undef B_ERROR /* There are some systems with this define */
49 #define B_WASBASHINPUT 0x08
51 /* A buffered stream. Like a FILE *, but with our own buffering and
52 synchronization. Look in input.c for the implementation. */
53 typedef struct BSTREAM
56 char *b_buffer; /* The buffer that holds characters read. */
57 size_t b_size; /* How big the buffer is. */
58 size_t b_used; /* How much of the buffer we're using, */
59 int b_flag; /* Flag values. */
60 size_t b_inputp; /* The input pointer, index into b_buffer. */
64 extern BUFFERED_STREAM **buffers;
67 extern int default_buffered_input;
69 #endif /* BUFFERED_INPUT */
74 #if defined (BUFFERED_INPUT)
80 enum stream_type type;
82 INPUT_STREAM location;
83 sh_cget_func_t *getter;
84 sh_cunget_func_t *ungetter;
87 extern BASH_INPUT bash_input;
89 /* Functions from parse.y whose use directly or indirectly depends on the
90 definitions in this file. */
91 extern void initialize_bash_input __P((void));
92 extern void init_yy_io __P((sh_cget_func_t *, sh_cunget_func_t *, enum stream_type, const char *, INPUT_STREAM));
93 extern char *yy_input_name __P((void));
94 extern void with_input_from_stdin __P((void));
95 extern void with_input_from_string __P((char *, const char *));
96 extern void with_input_from_stream __P((FILE *, const char *));
97 extern void push_stream __P((int));
98 extern void pop_stream __P((void));
99 extern int stream_on_stack __P((enum stream_type));
100 extern char *read_secondary_line __P((int));
101 extern int find_reserved_word __P((char *));
102 extern void gather_here_documents __P((void));
103 extern void execute_variable_command __P((char *, char *));
105 extern int *save_token_state __P((void));
106 extern void restore_token_state __P((int *));
108 /* Functions from input.c */
109 extern int getc_with_restart __P((FILE *));
110 extern int ungetc_with_restart __P((int, FILE *));
112 #if defined (BUFFERED_INPUT)
113 /* Functions from input.c. */
114 extern int fd_is_bash_input __P((int));
115 extern int set_bash_input_fd __P((int));
116 extern int save_bash_input __P((int, int));
117 extern int check_bash_input __P((int));
118 extern int duplicate_buffered_stream __P((int, int));
119 extern BUFFERED_STREAM *fd_to_buffered_stream __P((int));
120 extern BUFFERED_STREAM *set_buffered_stream __P((int, BUFFERED_STREAM *));
121 extern BUFFERED_STREAM *open_buffered_stream __P((char *));
122 extern void free_buffered_stream __P((BUFFERED_STREAM *));
123 extern int close_buffered_stream __P((BUFFERED_STREAM *));
124 extern int close_buffered_fd __P((int));
125 extern int sync_buffered_stream __P((int));
126 extern int buffered_getchar __P((void));
127 extern int buffered_ungetchar __P((int));
128 extern void with_input_from_buffered_stream __P((int, char *));
129 #endif /* BUFFERED_INPUT */
131 #endif /* _INPUT_H_ */