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/*
* Copyright 2007-2018 Adrian Thurston <thurston@colm.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _COLM_INPUT_H
#define _COLM_INPUT_H
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
#define FSM_BUFSIZE 8192
//#define FSM_BUFSIZE 8
#define INPUT_DATA 1
/* This is for data sources to return, not for the wrapper. */
#define INPUT_EOD 2
#define INPUT_EOF 3
#define INPUT_EOS 4
#define INPUT_LANG_EL 5
#define INPUT_TREE 6
#define INPUT_IGNORE 7
struct LangEl;
struct Pattern;
struct PatternItem;
struct Constructor;
struct ConsItem;
struct colm_tree;
struct colm_stream;
struct colm_location;
struct colm_program;
struct colm_struct;
struct colm_str;
struct colm_stream;
struct stream_impl;
enum run_buf_type {
RunBufDataType = 0,
RunBufTokenType,
RunBufIgnoreType,
RunBufSourceType
};
struct run_buf
{
enum run_buf_type type;
long length;
struct colm_tree *tree;
long offset;
struct run_buf *next, *prev;
/* Must be at the end. We will grow this struct to add data if the input
* demands it. */
char data[FSM_BUFSIZE];
};
struct run_buf *new_run_buf( int sz );
struct stream_funcs
{
int (*get_parse_block)( struct stream_impl *ss, int skip, char **pdp, int *copied );
int (*get_data)( struct stream_impl *ss, char *dest, int length );
int (*consume_data)( struct colm_program *prg, struct colm_tree **sp,
struct stream_impl *ss, int length, struct colm_location *loc );
int (*undo_consume_data)( struct stream_impl *ss, const char *data, int length );
struct colm_tree *(*consume_tree)( struct stream_impl *ss );
void (*undo_consume_tree)( struct stream_impl *ss,
struct colm_tree *tree, int ignore );
/* Language elments (compile-time). */
struct LangEl *(*consume_lang_el)( struct stream_impl *ss,
long *bind_id, char **data, long *length );
void (*undo_consume_lang_el)( struct stream_impl *ss );
/* Private implmentation for some shared get data functions. */
int (*get_data_source)( struct stream_impl *ss, char *dest, int length );
void (*set_eof)( struct stream_impl *is );
void (*unset_eof)( struct stream_impl *is );
/* Prepending to a stream. */
void (*prepend_data)( struct stream_impl *in, const char *data, long len );
void (*prepend_tree)( struct stream_impl *is, struct colm_tree *tree, int ignore );
void (*prepend_stream)( struct stream_impl *in, struct colm_tree *tree );
int (*undo_prepend_data)( struct stream_impl *is, int length );
struct colm_tree *(*undo_prepend_tree)( struct stream_impl *is );
struct colm_tree *(*undo_prepend_stream)( struct stream_impl *in );
/* Appending to a stream. */
void (*append_data)( struct stream_impl *in, const char *data, long len );
void (*append_tree)( struct stream_impl *in, struct colm_tree *tree );
void (*append_stream)( struct stream_impl *in, struct colm_tree *tree );
struct colm_tree *(*undo_append_data)( struct stream_impl *in, int length );
struct colm_tree *(*undo_append_tree)( struct stream_impl *in );
struct colm_tree *(*undo_append_stream)( struct stream_impl *in );
};
/* List of source streams. Enables streams to be pushed/popped. */
struct stream_impl
{
struct stream_funcs *funcs;
char eof_sent;
char eof;
char eos_sent;
struct run_buf *queue;
struct run_buf *queue_tail;
const char *data;
long dlen;
int offset;
long line;
long column;
long byte;
char *name;
FILE *file;
struct _StrCollect *collect;
struct Pattern *pattern;
struct PatternItem *pat_item;
struct Constructor *constructor;
struct ConsItem *cons_item;
int consumed;
/* Indentation. */
int level;
int indent;
};
struct stream_impl *colm_impl_new_pat( char *name, struct Pattern *pattern );
struct stream_impl *colm_impl_new_cons( char *name, struct Constructor *constructor );
struct stream_impl *colm_impl_new_generic( char *name );
void update_position( struct stream_impl *input_stream, const char *data, long length );
void undo_position( struct stream_impl *input_stream, const char *data, long length );
struct stream_impl *colm_stream_impl( struct colm_struct *s );
struct colm_str *collect_string( struct colm_program *prg, struct colm_stream *s );
struct colm_stream *colm_stream_open_collect( struct colm_program *prg );
void colm_close_stream_file( FILE *file );
#ifdef __cplusplus
}
#endif
#endif /* _COLM_INPUT_H */
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