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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#ifndef PIKE_COMPILER_H 
#define PIKE_COMPILER_H 
 
#include "lex.h" 
#include "program.h" 
 
extern struct program *reporter_program; 
extern struct program *compilation_env_program; 
extern struct program *compilation_program; 
extern struct object *compilation_environment; 
 
typedef int supporter_callback (void *, int); 
 
struct Supporter 
{ 
#ifdef PIKE_DEBUG 
  int magic; 
#endif 
 
  struct Supporter *previous; 
  /* Makes up a linked list of supporters with the first one in 
   * current_supporter. Supporters are linked onto this list during 
   * the (recursive) compilation of each compilation unit (i.e. 
   * compiled string). Thus nested programs and programs built from C 
   * don't have supporters. */ 
 
  struct Supporter *depends_on; 
  /* The supporter furthest in on the current_supporter linked list 
   * that this one depends on. When it gets unlinked from that list, 
   * this becomes a back pointer for the dependants linked list 
   * below. */ 
 
  struct Supporter *dependants, *next_dependant; 
  /* dependants points to a linked list of supporters that depends on 
   * this one, and next_dependant makes up the links between those 
   * supporters. A supporter is linked onto this list when it is 
   * unlinked from the current_supporter list. */ 
 
  struct object *self; 
  supporter_callback *fun; 
  void *data; 
 
  struct program *prog; 
  /* The top level program in the compilation unit. */ 
}; 
 
struct compilation 
{ 
  struct Supporter supporter; 
  struct pike_string *prog;         /* String to compile. */ 
  struct object *handler;           /* error_handler */ 
  struct object *compat_handler;    /* compat_handler */ 
  int major, minor;                 /* Base compat version */ 
  struct program *target;           /* Program being compiled. */ 
  struct object *placeholder; 
  int flags; 
 
  struct program *p;                        /* Compiled program or NULL. */ 
  struct lex lex; 
  int compilation_inherit;          /* Inherit in supporter->self containing 
                                         * compilation_program. */ 
 
  struct svalue default_module;             /* predef:: */ 
  struct byte_buffer used_modules;          /* Stack of svalues with imported 
                                         * modules. */ 
  INT32 num_used_modules;           /* Number of entries on the stack. */ 
 
  int compilation_depth;            /* Current class nesting depth. */ 
 
#ifdef PIKE_THREADS 
  int saved_lock_depth; 
#endif 
  struct mapping *resolve_cache; 
}; 
 
#ifdef PIKE_DEBUG 
#define CHECK_COMPILER()      do {                            \ 
    if (!Pike_fp || !compilation_program ||                     \ 
        Pike_fp->context->prog != compilation_program) {        \ 
      Pike_fatal("Invalid compilation context!\n");             \ 
    }                                                           \ 
  } while(0) 
#else 
#define CHECK_COMPILER() 
#endif 
#define THIS_COMPILATION  ((struct compilation *)(Pike_fp->current_storage)) 
#define MAYBE_THIS_COMPILATION  ((Pike_fp && compilation_program && (Pike_fp->context->prog == compilation_program))?THIS_COMPILATION:NULL) 
 
/* Complier passes */ 
#define COMPILER_PASS_NONE    0 
#define COMPILER_PASS_FIRST   1 
#define COMPILER_PASS_EXTRA   2 
#define COMPILER_PASS_LAST    3 
 
/* Flags for struct compilation. */ 
#define COMPILER_BUSY                 1       /* The compiler is busy. */ 
#define COMPILER_DONE                 2       /* The compiler is finished. */ 
#define COMPILER_NEED_EXTRA_PASS      4       /* Run an extra pass. */ 
 
/* CompilerEnvironment function numbers. */ 
#define CE_REPORT_FUN_NUM                             0 
#define CE_COMPILE_FUN_NUM                            1 
#define CE_RESOLV_FUN_NUM                             2 
#define CE_PIKE_COMPILER_FUN_NUM                      3 
#define CE_GET_COMPILATION_HANDLER_FUN_NUM            4 
#define CE_GET_DEFAULT_MODULE_FUN_NUM                 5 
#define CE_HANDLE_INHERIT_FUN_NUM                     6 
#define CE_HANDLE_IMPORT_FUN_NUM                      7 
 
/* PikeCompiler function numbers. */ 
#define PC_REPORT_FUN_NUM                             0 
#define PC_COMPILE_FUN_NUM                            1 
#define PC_RESOLV_FUN_NUM                             2 
#define PC_CREATE_FUN_NUM                             3 
#define PC_GET_COMPILATION_HANDLER_FUN_NUM            4 
#define PC_GET_DEFAULT_MODULE_FUN_NUM                 5 
#define PC_CHANGE_COMPILER_COMPATIBILITY_FUN_NUM      6 
#define PC_HANDLE_INHERIT_FUN_NUM                     7 
#define PC_HANDLE_IMPORT_FUN_NUM                      8 
#define PC_POP_TYPE_ATTRIBUTE_FUN_NUM                 9 
#define PC_PUSH_TYPE_ATTRIBUTE_FUN_NUM                        10 
#define PC_APPLY_TYPE_ATTRIBUTE_FUN_NUM                       11 
#define PC_APPLY_ATTRIBUTE_CONSTANT_FUN_NUM           12 
 
extern struct program *null_program; 
extern struct program *placeholder_program; 
extern struct object *placeholder_object; 
 
/* Prototypes begin here */ 
PMOD_EXPORT void lock_pike_compiler(void); 
PMOD_EXPORT void unlock_pike_compiler(void); 
void verify_supporters(void); 
void init_supporter(struct Supporter *s, 
                    supporter_callback *fun, 
                    void *data); 
int unlink_current_supporter(struct Supporter *c); 
int call_dependants(struct Supporter *s, int finish); 
int report_compiler_dependency(struct program *p); 
struct compilation; 
void run_pass2(struct compilation *c); 
PMOD_EXPORT void enter_compiler(struct pike_string *filename, 
                                INT_TYPE linenumber); 
PMOD_EXPORT void exit_compiler(void); 
PMOD_EXPORT void va_yyreport(int severity_level, 
                             struct pike_string *file, INT_TYPE line, 
                             struct pike_string *system, INT32 args, 
                             const char *fmt, va_list vargs); 
PMOD_EXPORT void low_yyreport(int severity_level, 
                              struct pike_string *file, INT_TYPE line, 
                              struct pike_string *system, 
                              INT32 args, const char *fmt, ...); 
PMOD_EXPORT void yyreport(int severity_level, struct pike_string *system, 
                          INT32 args, const char *fmt, ...); 
PMOD_EXPORT void yywarning(char *fmt, ...); 
PMOD_EXPORT void my_yyerror(const char *fmt,...); 
PMOD_EXPORT void yyerror(const char *s); 
void yytype_report(int severity_level, 
                   struct pike_string *expect_file, INT_TYPE expect_line, 
                   struct pike_type *expected_t, 
                   struct pike_string *got_file, INT_TYPE got_line, 
                   struct pike_type *got_t, 
                   INT32 args, const char *fmt, ...); 
void yytype_error(const char *msg, struct pike_type *expected_t, 
                  struct pike_type *got_t, unsigned int flags); 
struct pike_string *format_exception_for_error_msg (struct svalue *thrown); 
void handle_compile_exception (const char *yyerror_fmt, ...); 
void push_compiler_frame(int lexical_scope); 
node *low_pop_local_variables(int level, node *block); 
node *pop_local_variables(int level, node *block); 
void pop_compiler_frame(void); 
PMOD_EXPORT void change_compiler_compatibility(int major, int minor); 
void low_init_pike_compiler(void); 
void init_pike_compiler(void); 
void cleanup_pike_compiler(void); 
void low_cleanup_pike_compiler(void); 
/* Prototypes end here */ 
 
#endif        /* !PIKE_COMPILER_H */