/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001, 2002, 2005, 2006, 2007, 2008, 2009,
   2010 Free Software Foundation, Inc.

   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; either
   version 3 of the License, or (at your option) any later version.

   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, write to the
   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301 USA */

#include <mailutils/sieve.h>
#include <setjmp.h>
#include <string.h>

#define SIEVE_CODE_INCR 128

typedef void (*sieve_instr_t) (mu_sieve_machine_t mach);

typedef union {
  sieve_instr_t instr;
  mu_sieve_handler_t handler;
  mu_sieve_value_t *val;
  mu_list_t list;
  long number;
  const char *string;
  size_t pc;
  size_t line;
} sieve_op_t;

struct mu_sieve_machine {
  /* Static data */
  mu_sieve_locus_t locus;    /* Approximate location in the code */

  mu_list_t memory_pool;     /* Pool of allocated memory objects */
  mu_list_t destr_list;      /* List of destructor functions */

  /* Symbol space: */
  mu_list_t test_list;       /* Tests */
  mu_list_t action_list;     /* Actions */
  mu_list_t comp_list;       /* Comparators */
  mu_list_t source_list;     /* Source names (for diagnostics) */
  
  size_t progsize;           /* Number of allocated program cells */
  sieve_op_t *prog;          /* Compiled program */

  /* Runtime data */
  size_t pc;                 /* Current program counter */
  long reg;                  /* Numeric register */
  mu_list_t stack;           /* Runtime stack */

  int debug_level;           /* Debugging level */
  jmp_buf errbuf;            /* Target location for non-local exits */
  const char *identifier;    /* Name of action or test being executed */
  
  mu_mailbox_t mailbox;      /* Mailbox to operate upon */
  size_t    msgno;           /* Current message number */
  mu_message_t msg;          /* Current message */
  int action_count;          /* Number of actions executed over this message */
			    
  /* User supplied data */
  mu_sieve_parse_error_t parse_error_printer;
  mu_sieve_printf_t error_printer; 
  mu_sieve_printf_t debug_printer;
  mu_sieve_action_log_t logger;
  
  mu_mailer_t mailer;
  mu_debug_t debug;
  char *daemon_email;
  void *data;
};

extern mu_sieve_locus_t mu_sieve_locus;
extern mu_sieve_machine_t mu_sieve_machine;
extern int mu_sieve_error_count; 

#define TAG_COMPFUN "__compfun__"
#define TAG_RELFUN  "__relfun__"

void mu_sv_compile_error (mu_sieve_locus_t *locus,
			  const char *fmt, ...) MU_PRINTFLIKE(2,3);
void mu_sv_print_value_list (mu_list_t list, mu_sieve_printf_t printer,
			     void *data);
void mu_sv_print_tag_list (mu_list_t list, mu_sieve_printf_t printer,
			   void *data);

int mu_sv_lex_begin (const char *name);
int mu_sv_lex_begin_string (const char *buf, int bufsize,
			    const char *fname, int line);
void mu_sv_lex_finish (void);
int mu_sieve_yyerror (const char *s);
int mu_sieve_yylex (); 

void mu_sv_register_standard_actions (mu_sieve_machine_t mach);
void mu_sv_register_standard_tests (mu_sieve_machine_t mach);
void mu_sv_register_standard_comparators (mu_sieve_machine_t mach);

int mu_sv_code (sieve_op_t *op);
int mu_sv_code_instr (sieve_instr_t instr);
int mu_sv_code_handler (mu_sieve_handler_t handler);
int mu_sv_code_list (mu_list_t list);
int mu_sv_code_number (long num);
int mu_sv_code_test (mu_sieve_register_t *reg, mu_list_t arglist);
int mu_sv_code_action (mu_sieve_register_t *reg, mu_list_t arglist);
void mu_sv_code_anyof (size_t start);
void mu_sv_code_allof (size_t start);
int mu_sv_code_source (const char *name);
int mu_sv_code_line (size_t line);
void mu_sv_change_source (void);

void _mu_sv_instr_action (mu_sieve_machine_t mach);
void _mu_sv_instr_test (mu_sieve_machine_t mach);
void _mu_sv_instr_push (mu_sieve_machine_t mach);
void _mu_sv_instr_pop (mu_sieve_machine_t mach);
void _mu_sv_instr_not (mu_sieve_machine_t mach);
void _mu_sv_instr_branch (mu_sieve_machine_t mach);
void _mu_sv_instr_brz (mu_sieve_machine_t mach);
void _mu_sv_instr_brnz (mu_sieve_machine_t mach);
void _mu_sv_instr_nop (mu_sieve_machine_t mach);
void _mu_sv_instr_source (mu_sieve_machine_t mach);
void _mu_sv_instr_line (mu_sieve_machine_t mach);

int mu_sv_load_add_path (mu_list_t path);
int mu_sv_load_add_dir (mu_sieve_machine_t mach, const char *name);