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Diffstat (limited to 'input.h')
| -rw-r--r-- | input.h | 132 |
1 files changed, 132 insertions, 0 deletions
@@ -0,0 +1,132 @@ +/* input.h -- Structures and unions used for reading input. */ + +/* Copyright (C) 1993-2009 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. +*/ + +#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 (); /* no longer used */ +typedef char **CPPFunction (); /* no longer used */ +#endif /* _FUNCTION_DEF */ + +typedef int sh_cget_func_t __P((void)); /* sh_ivoidfunc_t */ +typedef int sh_cunget_func_t __P((int)); /* sh_intfunc_t */ + +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 0x01 +#define B_ERROR 0x02 +#define B_UNBUFF 0x04 +#define B_WASBASHINPUT 0x08 + +/* 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. */ + size_t b_used; /* How much of the buffer we're using, */ + int b_flag; /* Flag values. */ + size_t 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; + sh_cget_func_t *getter; + sh_cunget_func_t *ungetter; +} BASH_INPUT; + +extern BASH_INPUT bash_input; + +/* Functions from parse.y whose use directly or indirectly depends on the + definitions in this file. */ +extern void initialize_bash_input __P((void)); +extern void init_yy_io __P((sh_cget_func_t *, sh_cunget_func_t *, enum stream_type, const char *, INPUT_STREAM)); +extern char *yy_input_name __P((void)); +extern void with_input_from_stdin __P((void)); +extern void with_input_from_string __P((char *, const char *)); +extern void with_input_from_stream __P((FILE *, const 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 void gather_here_documents __P((void)); +extern void execute_variable_command __P((char *, char *)); + +extern int *save_token_state __P((void)); +extern void restore_token_state __P((int *)); + +/* Functions from input.c */ +extern int getc_with_restart __P((FILE *)); +extern int ungetc_with_restart __P((int, FILE *)); + +#if defined (BUFFERED_INPUT) +/* Functions from input.c. */ +extern int fd_is_bash_input __P((int)); +extern int set_bash_input_fd __P((int)); +extern int save_bash_input __P((int, int)); +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_ */ |