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/*
* This library is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* This library 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
#if !defined (__CAMEL_H_INSIDE__) && !defined (CAMEL_COMPILATION)
#error "Only <camel/camel.h> can be included directly."
#endif
#ifndef CAMEL_SEXP_H
#define CAMEL_SEXP_H
#include <setjmp.h>
#include <time.h>
#include <glib.h>
#include <glib-object.h>
#include <camel/camel-memchunk.h>
/* Standard GObject macros */
#define CAMEL_TYPE_SEXP \
(camel_sexp_get_type ())
#define CAMEL_SEXP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST \
((obj), CAMEL_TYPE_SEXP, CamelSExp))
#define CAMEL_SEXP_CLASS(cls) \
(G_TYPE_CHECK_CLASS_CAST \
((cls), CAMEL_TYPE_SEXP, CamelSExpClass))
#define CAMEL_IS_SEXP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE \
((obj), CAMEL_TYPE_SEXP))
#define CAMEL_IS_SEXP_CLASS(cls) \
(G_TYPE_CHECK_CLASS_TYPE \
((cls), CAMEL_TYPE_SEXP))
#define CAMEL_SEXP_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS \
((obj), CAMEL_TYPE_SEXP, CamelSExpClass))
G_BEGIN_DECLS
typedef struct _CamelSExp CamelSExp;
typedef struct _CamelSExpClass CamelSExpClass;
typedef struct _CamelSExpSymbol CamelSExpSymbol;
typedef struct _CamelSExpResult CamelSExpResult;
typedef struct _CamelSExpTerm CamelSExpTerm;
/**
* CamelSExpResultType:
*
* Since: 3.4
**/
typedef enum {
CAMEL_SEXP_RES_ARRAY_PTR, /* type is a ptrarray, what it points to is implementation dependant */
CAMEL_SEXP_RES_INT, /* type is a number */
CAMEL_SEXP_RES_STRING, /* type is a pointer to a single string */
CAMEL_SEXP_RES_BOOL, /* boolean type */
CAMEL_SEXP_RES_TIME, /* time_t type */
CAMEL_SEXP_RES_UNDEFINED /* unknown type */
} CamelSExpResultType;
/**
* CamelSExpResult:
*
* Since: 3.4
**/
struct _CamelSExpResult {
CamelSExpResultType type;
union {
GPtrArray *ptrarray;
gint number;
gchar *string;
gint boolean;
time_t time;
} value;
gboolean time_generator;
time_t occuring_start;
time_t occuring_end;
};
/**
* CamelSExpFunc:
*
* Since: 3.4
**/
typedef CamelSExpResult *
(*CamelSExpFunc) (CamelSExp *sexp,
gint argc,
CamelSExpResult **argv,
gpointer data);
/**
* CamelSExpIFunc:
*
* Since: 3.4
**/
typedef CamelSExpResult *
(*CamelSExpIFunc) (CamelSExp *sexp, gint argc,
CamelSExpTerm **argv,
gpointer data);
/**
* CamelSExpTermType:
*
* Since: 3.4
**/
typedef enum {
CAMEL_SEXP_TERM_INT, /* integer literal */
CAMEL_SEXP_TERM_BOOL, /* boolean literal */
CAMEL_SEXP_TERM_STRING, /* string literal */
CAMEL_SEXP_TERM_TIME, /* time_t literal (number of seconds past the epoch) */
CAMEL_SEXP_TERM_FUNC, /* normal function, arguments are evaluated before calling */
CAMEL_SEXP_TERM_IFUNC, /* immediate function, raw terms are arguments */
CAMEL_SEXP_TERM_VAR /* variable reference */
} CamelSExpTermType;
/**
* CamelSExpSymbol:
*
* Since: 3.4
**/
struct _CamelSExpSymbol {
gint type; /* TERM_FUNC or TERM_VAR */
gchar *name;
gpointer data;
union {
CamelSExpFunc func;
CamelSExpIFunc ifunc;
} f;
};
/**
* CamelSExpTerm:
*
* Since: 3.4
**/
struct _CamelSExpTerm {
CamelSExpTermType type;
union {
gchar *string;
gint number;
gint boolean;
time_t time;
struct {
CamelSExpSymbol *sym;
CamelSExpTerm **terms;
gint termcount;
} func;
CamelSExpSymbol *var;
} value;
};
/**
* CamelSExp:
*
* Since: 3.4
**/
struct _CamelSExp {
GObject parent;
GScanner *scanner; /* for parsing text version */
CamelSExpTerm *tree; /* root of expression tree */
/* private stuff */
jmp_buf failenv;
gchar *error;
GSList *operators;
/* TODO: may also need a pool allocator for term strings,
* so we dont lose them in error conditions? */
CamelMemChunk *term_chunks;
CamelMemChunk *result_chunks;
};
struct _CamelSExpClass {
GObjectClass parent_class;
};
GType camel_sexp_get_type (void) G_GNUC_CONST;
CamelSExp * camel_sexp_new (void);
void camel_sexp_add_function (CamelSExp *sexp,
guint scope,
const gchar *name,
CamelSExpFunc func,
gpointer data);
void camel_sexp_add_ifunction (CamelSExp *sexp,
guint scope,
const gchar *name,
CamelSExpIFunc func,
gpointer data);
void camel_sexp_add_variable (CamelSExp *sexp,
guint scope,
gchar *name,
CamelSExpTerm *value);
void camel_sexp_remove_symbol (CamelSExp *sexp,
guint scope,
const gchar *name);
gint camel_sexp_set_scope (CamelSExp *sexp,
guint scope);
void camel_sexp_input_text (CamelSExp *sexp,
const gchar *text,
gint len);
void camel_sexp_input_file (CamelSExp *sexp,
gint fd);
gint camel_sexp_parse (CamelSExp *sexp);
CamelSExpResult *
camel_sexp_eval (CamelSExp *sexp);
CamelSExpResult *
camel_sexp_term_eval (CamelSExp *sexp,
CamelSExpTerm *term);
CamelSExpResult *
camel_sexp_result_new (CamelSExp *sexp,
gint type);
void camel_sexp_result_free (CamelSExp *sexp,
CamelSExpResult *term);
/* used in normal functions if they have to abort, to free their arguments */
void camel_sexp_resultv_free (CamelSExp *sexp,
gint argc,
CamelSExpResult **argv);
/* utility functions for creating s-exp strings. */
void camel_sexp_encode_bool (GString *string,
gboolean v_bool);
void camel_sexp_encode_string (GString *string,
const gchar *v_string);
/* only to be called from inside a callback to signal a fatal execution error */
void camel_sexp_fatal_error (CamelSExp *sexp,
const gchar *why,
...) G_GNUC_NORETURN;
/* return the error string */
const gchar * camel_sexp_error (CamelSExp *sexp);
CamelSExpTerm * camel_sexp_parse_value (CamelSExp *sexp);
gboolean camel_sexp_evaluate_occur_times (CamelSExp *sexp,
time_t *start,
time_t *end);
G_END_DECLS
#endif /* CAMEL_SEXP_H */
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