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/* 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
;
/* This is used to block re-definition of built-in functions */
extern
int
is_builtin_function
(
int
t_num
);
/* 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 */
intgr_t
int_expression
(
void
);
double
real_expression
(
void
);
void
parse_reset_after_error
(
void
);
struct
value
*
const_string_express
(
struct
value
*
valptr
);
struct
value
*
const_express
(
struct
value
*
valptr
);
char
*
string_or_express
(
struct
at_type
*
*
atptr
);
struct
at_type
*
temp_at
(
void
);
struct
at_type
*
perm_at
(
void
);
struct
at_type
*
create_call_column_at
(
char
*
);
struct
at_type
*
create_call_columnhead
(
void
);
struct
udvt_entry
*
add_udv
(
int
t_num
);
struct
udft_entry
*
add_udf
(
int
t_num
);
void
cleanup_udvlist
(
void
);
int
is_function
(
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
(
void
);
TBOOLEAN
next_iteration
(
t_iterator
*
);
TBOOLEAN
empty_iteration
(
t_iterator
*
);
TBOOLEAN
forever_iteration
(
t_iterator
*
);
t_iterator
*
cleanup_iteration
(
t_iterator
*
);
void
parse_link_via
(
struct
udft_entry
*
);
/* Magic number used instead of actual column number in $# */
#define
DOLLAR_NCOLUMNS
-123
#endif
/* PARSE_H */
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