/*
  generic s-exp evaluator class
*/
#ifndef _E_SEXP_H
#define _E_SEXP_H

#include <setjmp.h>
#include <time.h>
#include <glib.h>

#ifdef E_SEXP_IS_GTK_OBJECT
#include <gtk/gtkobject.h>
#endif

#ifdef E_SEXP_IS_GTK_OBJECT
#define E_SEXP(obj)         GTK_CHECK_CAST (obj, e_sexp_get_type (), ESExp)
#define E_SEXP_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, e_sexp_get_type (), ESExpClass)
#define FILTER_IS_SEXP(obj)      GTK_CHECK_TYPE (obj, e_sexp_get_type ())
#else
#define E_SEXP(obj)         ((struct _ESExp *)(obj))
#define E_SEXP_CLASS(klass) 	((struct _ESExpClass *)(klass))
#define FILTER_IS_SEXP(obj)      (1)
#endif

typedef struct _ESExp      ESExp;
typedef struct _ESExpClass ESExpClass;

typedef struct _ESExpSymbol ESExpSymbol;
typedef struct _ESExpResult ESExpResult;
typedef struct _ESExpTerm ESExpTerm;

typedef struct _ESExpResult *(ESExpFunc)(struct _ESExp *sexp,
						   int argc,
						   struct _ESExpResult **argv,
						   void *data);

typedef struct _ESExpResult *(ESExpIFunc)(struct _ESExp *sexp,
						    int argc,
						    struct _ESExpTerm **argv,
						    void *data);
enum _ESExpResultType {
	ESEXP_RES_ARRAY_PTR=0,	/* type is a ptrarray, what it points to is implementation dependant */
	ESEXP_RES_INT,		/* type is a number */
	ESEXP_RES_STRING,	/* type is a pointer to a single string */
	ESEXP_RES_BOOL,		/* boolean type */
	ESEXP_RES_TIME,		/* time_t type */
	ESEXP_RES_UNDEFINED	/* unknown type */
};

struct _ESExpResult {
	enum _ESExpResultType type;
	union {
		GPtrArray *ptrarray;
		int number;
		char *string;
		int bool;
		time_t time;
	} value;
};

enum _ESExpTermType {
	ESEXP_TERM_INT	= 0,	/* integer literal */
	ESEXP_TERM_BOOL,	/* boolean literal */
	ESEXP_TERM_STRING,	/* string literal */
	ESEXP_TERM_TIME,	/* time_t literal (number of seconds past the epoch) */
	ESEXP_TERM_FUNC,	/* normal function, arguments are evaluated before calling */
	ESEXP_TERM_IFUNC,	/* immediate function, raw terms are arguments */
	ESEXP_TERM_VAR,		/* variable reference */
};

struct _ESExpSymbol {
	int type;		/* ESEXP_TERM_FUNC or ESEXP_TERM_VAR */
	char *name;
	void *data;
	union {
		ESExpFunc *func;
		ESExpIFunc *ifunc;
	} f;
};

struct _ESExpTerm {
	enum _ESExpTermType type;
	union {
		char *string;
		int number;
		int bool;
		time_t time;
		struct {
			struct _ESExpSymbol *sym;
			struct _ESExpTerm **terms;
			int termcount;
		} func;
		struct _ESExpSymbol *var;
	} value;
};



struct _ESExp {
#ifdef E_SEXP_IS_GTK_OBJECT
	GtkObject object;
#else
	int refcount;
#endif
	GScanner *scanner;	/* for parsing text version */
	ESExpTerm *tree;	/* root of expression tree */

	/* private stuff */
	jmp_buf failenv;
	char *error;

	/* TODO: may also need a pool allocator for term strings, so we dont lose them
	   in error conditions? */
	struct _EMemChunk *term_chunks;
	struct _EMemChunk *result_chunks;
};

struct _ESExpClass {
#ifdef E_SEXP_IS_GTK_OBJECT
	GtkObjectClass parent_class;
#endif
};

#ifdef E_SEXP_IS_GTK_OBJECT
guint		e_sexp_get_type		(void);
#endif
ESExp 	       *e_sexp_new		(void);
#ifndef E_SEXP_IS_GTK_OBJECT
void		e_sexp_ref		(ESExp *f);
void		e_sexp_unref		(ESExp *f);
#endif
void		e_sexp_add_function  	(ESExp *f, int scope, char *name, ESExpFunc *func, void *data);
void		e_sexp_add_ifunction  	(ESExp *f, int scope, char *name, ESExpIFunc *func, void *data);
void		e_sexp_add_variable  	(ESExp *f, int scope, char *name, ESExpTerm *value);
void		e_sexp_remove_symbol	(ESExp *f, int scope, char *name);
int		e_sexp_set_scope	(ESExp *f, int scope);

void		e_sexp_input_text	(ESExp *f, const char *text, int len);
void		e_sexp_input_file	(ESExp *f, int fd);


int		e_sexp_parse		(ESExp *f);
ESExpResult    *e_sexp_eval		(ESExp *f);

ESExpResult    *e_sexp_term_eval	(struct _ESExp *f, struct _ESExpTerm *t);
ESExpResult    *e_sexp_result_new	(struct _ESExp *f, int type);
void		e_sexp_result_free	(struct _ESExp *f, struct _ESExpResult *t);

/* used in normal functions if they have to abort, to free their arguments */
void		e_sexp_resultv_free	(struct _ESExp *f, int argc, struct _ESExpResult **argv);

/* utility functions for creating s-exp strings. */
void		e_sexp_encode_bool	(GString *s, gboolean state);
void		e_sexp_encode_string	(GString *s, const char *string);

/* only to be called from inside a callback to signal a fatal execution error */
void		e_sexp_fatal_error	(struct _ESExp *f, char *why, ...);

/* return the error string */
const char     *e_sexp_error		(struct _ESExp *f);

#endif /* _E_SEXP_H */
'gstreamer'>gstreamer</option>
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<option value='gstreamer0.10-removal' selected='selected'>gstreamer0.10-removal</option>
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<table class='tabs'><tr><td>
<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/about/?h=gstreamer0.10-removal'>about</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/?h=gstreamer0.10-removal'>summary</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/refs/?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>refs</a><a class='active' href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal'>log</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/tree/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>tree</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>commit</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/diff/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>diff</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/stats/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal'>stats</a></td><td class='form'><form class='right' method='get' action='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Plack-Handler-AnyEvent-ReverseHTTP'>
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<div class='path'>path: <a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>root</a>/<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>www</a>/<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f'>p5-Plack-Handler-AnyEvent-ReverseHTTP</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th></th><th class='left'>Commit message (<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=133802a1977f876853f50ed6ec5f002b6a8b118f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Age</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td class='commitgraph'>* </td><td><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=e598d34341b62529b9ef63db27d571f9bcb8c766'>Add NO_STAGE all over the place in preparation for the staging support (cat: ...</a></td><td>bapt</td><td><span title='2013-09-21 07:36:50 +0800'>2013-09-21</span></td><td>1</td><td><span class='deletions'>-5</span>/<span class='insertions'>+1</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=6baf7039c86d473e80dadb8c18e58a99ff11272a'>- convert to the new perl5 framework</a></td><td>az</td><td><span title='2013-09-02 19:04:10 +0800'>2013-09-02</span></td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+2</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=586b104534333ef33a853e192eb1ad5c50a9e0c1'>Fix @dirrmtry in plist found by 9.1-REL exp run.</a></td><td>kuriyama</td><td><span title='2012-11-08 13:39:07 +0800'>2012-11-08</span></td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=811c4be9f0b92363ffcd033d9165287cd6bc9b63'>- Convert all remaining instances of BUILD_DEPENDS=${RUN_DEPENDS} or</a></td><td>swills</td><td><span title='2012-06-11 02:42:48 +0800'>2012-06-11</span></td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Plack-Handler-AnyEvent-ReverseHTTP?h=gstreamer0.10-removal&amp;id=4ab972b7468e739167f0f48c87471c6c6b7da9e5'>- Get Rid MD5 support</a></td><td>miwi</td><td><span title='2011-03-19 20:38:54 +0800'>2011-03-19</span></td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+0</span></td></tr>