/*
* $Id: parse.h,v 1.38 2017/02/04 23:59:27 sfeam Exp $
*/
/* GNUPLOT - parse.h */
/*[
* Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
#ifndef PARSE_H
# define PARSE_H
# include "syscfg.h"
# include "gp_types.h"
#include "eval.h"
/* externally usable types defined by parse.h */
/* exported variables of parse.c */
extern TBOOLEAN scanning_range_in_progress;
/* The choice of dummy variables, as set by 'set dummy', 'set polar'
* and 'set parametric' */
extern char set_dummy_var[MAX_NUM_VAR][MAX_ID_LEN+1];
/* Dummy variables referenced by name in a fit command */
/* Sep 2014 (DEBUG) used to deduce how many independent variables */
extern int fit_dummy_var[MAX_NUM_VAR];
/* the currently used 'dummy' variables. Usually a copy of
* set_dummy_var, but may be changed by the '(s)plot' command
* containing an explicit range (--> 'plot [phi=0..pi]') */
extern char c_dummy_var[MAX_NUM_VAR][MAX_ID_LEN+1];
/* This is used by plot_option_using() */
extern int at_highest_column_used;
/* This is checked by df_readascii() */
extern TBOOLEAN parse_1st_row_as_headers;
/* This is used by df_open() and df_readascii() */
extern udvt_entry *df_array;
/* Protection mechanism for trying to parse a string followed by a + or - sign.
* Also suppresses an undefined variable message if an unrecognized token
* is encountered during try_to_get_string().
*/
extern TBOOLEAN string_result_only;
/* Prototypes of exported functions in parse.c */
int int_expression __PROTO(());
double real_expression __PROTO(());
void parse_reset_after_error __PROTO(());
struct value * const_string_express __PROTO((struct value *valptr));
struct value * const_express __PROTO((struct value *valptr));
char* string_or_express __PROTO((struct at_type **atptr));
struct at_type * temp_at __PROTO((void));
struct at_type * perm_at __PROTO((void));
struct at_type * create_call_column_at __PROTO((char *));
struct udvt_entry * add_udv __PROTO((int t_num));
struct udft_entry * add_udf __PROTO((int t_num));
void cleanup_udvlist __PROTO((void));
int is_function __PROTO((int t_num));
/* Code that uses the iteration routines here must provide */
/* a blank iteration structure to use for bookkeeping. */
typedef struct iterator {
struct iterator *next; /* linked list */
struct udvt_entry *iteration_udv;
t_value original_udv_value; /* prior value of iteration variable */
char *iteration_string;
int iteration_start;
int iteration_end;
int iteration_increment;
int iteration_current; /* start + increment * iteration */
int iteration; /* runs from 0 to (end-start)/increment */
struct at_type *start_at; /* expression that evaluates to iteration_start */
struct at_type *end_at; /* expression that evaluates to iteration_end */
} t_iterator;
extern t_iterator * plot_iterator; /* Used for plot and splot */
extern t_iterator * set_iterator; /* Used by set/unset commands */
/* These are used by the iteration code */
t_iterator * check_for_iteration __PROTO((void));
TBOOLEAN next_iteration __PROTO((t_iterator *));
TBOOLEAN empty_iteration __PROTO((t_iterator *));
TBOOLEAN forever_iteration __PROTO((t_iterator *));
t_iterator * cleanup_iteration __PROTO((t_iterator *));
void parse_link_via __PROTO((struct udft_entry *));
#endif /* PARSE_H */