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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_TYPES_H 
#define PIKE_TYPES_H 
 
#include "svalue.h" 
#include "stralloc.h" 
#include "string_builder.h" 
 
#define PIKE_TYPE_STACK_SIZE 100000 
 
#ifdef PIKE_DEBUG 
void TYPE_STACK_DEBUG(const char *fun); 
#else /* !PIKE_DEBUG */ 
#define TYPE_STACK_DEBUG(X) 
#endif /* PIKE_DEBUG */ 
 
/* 
 * The new type type. 
 */ 
struct pike_type 
{ 
  GC_MARKER_MEMBERS; 
  unsigned INT32 hash; 
  struct pike_type *next; 
  unsigned INT32 flags; 
  unsigned INT16 type; 
  struct pike_type *car; 
  struct pike_type *cdr; 
}; 
 
extern struct pike_type **pike_type_hash; 
extern size_t pike_type_hash_size; 
 
#define CAR_TO_INT(TYPE) ((char *) (TYPE)->car - (char *) 0) 
#define CDR_TO_INT(TYPE) ((char *) (TYPE)->cdr - (char *) 0) 
 
/* 
 * pike_type flags: 
 */ 
#define PT_FLAG_MARKER_0      0x000001        /* The subtree holds a '0'. */ 
#define PT_FLAG_MARKER_1      0x000002        /* The subtree holds a '1'. */ 
#define PT_FLAG_MARKER_2      0x000004        /* The subtree holds a '2'. */ 
#define PT_FLAG_MARKER_3      0x000008        /* The subtree holds a '3'. */ 
#define PT_FLAG_MARKER_4      0x000010        /* The subtree holds a '4'. */ 
#define PT_FLAG_MARKER_5      0x000020        /* The subtree holds a '5'. */ 
#define PT_FLAG_MARKER_6      0x000040        /* The subtree holds a '6'. */ 
#define PT_FLAG_MARKER_7      0x000080        /* The subtree holds a '7'. */ 
#define PT_FLAG_MARKER_8      0x000100        /* The subtree holds a '8'. */ 
#define PT_FLAG_MARKER_9      0x000200        /* The subtree holds a '9'. */ 
#define PT_FLAG_MARKER                0x0003ff        /* The subtree holds markers. */ 
#define PT_ASSIGN_SHIFT               12              /* Number of bits to shift. */ 
#define PT_FLAG_ASSIGN_0      0x001000        /* The subtree assigns '0'. */ 
#define PT_FLAG_ASSIGN_1      0x002000        /* The subtree assigns '1'. */ 
#define PT_FLAG_ASSIGN_2      0x004000        /* The subtree assigns '2'. */ 
#define PT_FLAG_ASSIGN_3      0x008000        /* The subtree assigns '3'. */ 
#define PT_FLAG_ASSIGN_4      0x010000        /* The subtree assigns '4'. */ 
#define PT_FLAG_ASSIGN_5      0x020000        /* The subtree assigns '5'. */ 
#define PT_FLAG_ASSIGN_6      0x040000        /* The subtree assigns '6'. */ 
#define PT_FLAG_ASSIGN_7      0x080000        /* The subtree assigns '7'. */ 
#define PT_FLAG_ASSIGN_8      0x100000        /* The subtree assigns '8'. */ 
#define PT_FLAG_ASSIGN_9      0x200000        /* The subtree assigns '9'. */ 
#define PT_FLAG_ASSIGN                0x3ff000        /* The subtree holds assigns. */ 
 
#define PT_FLAG_MARK_ASSIGN   0x3ff3ff        /* Assigns AND Markers. */ 
 
#define PT_FLAG_INT_ONLY      0x1000000       /* Filter non-integers. */ 
 
/* 
 * Flags used by low_match_types(). 
 */ 
#define A_EXACT 1 
#define B_EXACT 2 
#define NO_MAX_ARGS 4 
#define NO_SHORTCUTS 8 
 
#define TYPE_GROUPING 
 
/* 
 * Flags used by pike_types_le() 
 */ 
#define LE_WEAK_OBJECTS       1       /* Perform weaker checking of objects. */ 
#define LE_A_B_SWAPPED        2       /* Argument A and B have been swapped. 
                                 * Relevant for markers. 
                                 */ 
#ifdef TYPE_GROUPING 
#define LE_A_GROUPED  4       /* Argument A has been grouped. 
                                 * Perform weaker checking for OR-nodes. */ 
#define LE_B_GROUPED  8       /* Argument B has been grouped. 
                                 * Perform weaker checking for OR-nodes. */ 
#define LE_A_B_GROUPED        12      /* Both the above two flags. */ 
#endif 
#define LE_USE_HANDLERS       16      /* Call handlers if appropriate. */ 
#define LE_EXPLICIT_ZERO 32   /* Zero is not subtype of all others. */ 
#define LE_TYPE_SVALUE        64      /* Same matching as match_type_svalue(). */ 
 
/* 
 * Flags used by low_get_first_arg_type() 
 * 
 * Note that these differ for the flags to get_first_arg_type(). 
 */ 
#define FILTER_KEEP_VOID 1    /* Keep void during the filtering. */ 
 
/* 
 * Flags used as flag_method to mk_type() 
 */ 
#define PT_COPY_CAR   1 
#define PT_COPY_CDR   2 
#define PT_COPY_BOTH  3 
#define PT_IS_MARKER  4       /* The node is a marker. */ 
 
/* 
 * new_check_call(), check_splice_call() and get_first_arg_type() flags 
 */ 
#define CALL_STRICT           0x0001  /* Strict checking. */ 
#define CALL_NOT_LAST_ARG     0x0002  /* This is not the last argument. */ 
#define CALL_WEAK_VOID                0x0008  /* Allow promotion of void to zero. */ 
#define CALL_ARG_LVALUE               0x0010  /* Argument is lvalue (sscanf). */ 
#define CALL_INHIBIT_WARNINGS 0x0020  /* Inhibit warnings. */ 
#define CALL_INVERTED_TYPES   0x0040  /* The fun and arg are inverted. */ 
 
/* 
 * soft_cast() flags 
 */ 
#define SOFT_WEAKER   0x0001  /* Soft cast to a weaker type. */ 
 
void debug_free_type(struct pike_type *t); 
#ifdef DEBUG_MALLOC 
#define copy_pike_type(D, S) add_ref((struct pike_type *)debug_malloc_pass(D = (S))) 
#else /* !DEBUG_MALLOC */ 
#define copy_pike_type(D, S)  add_ref(D = (S)) 
#endif /* DEBUG_MALLOC */ 
#define CONSTTYPE(X) make_pike_type(X) 
 
extern struct pike_type **type_stack; 
extern struct pike_type ***pike_type_mark_stack; 
 
#define debug_free_type_preamble(T) do {                              \ 
    debug_malloc_touch_named (T, "free_type");                          \ 
    DO_IF_DEBUG (                                                       \ 
      DO_IF_PIKE_CLEANUP (                                              \ 
        if (gc_external_refs_zapped)                                    \ 
          gc_check_zapped (T, PIKE_T_TYPE, __FILE__, __LINE__)));       \ 
  } while (0) 
 
#define free_type(T) do {                                             \ 
    struct pike_type *t_ = (T);                                         \ 
    debug_free_type_preamble (t_);                                      \ 
    debug_free_type (t_);                                               \ 
  } while (0) 
 
#define free_pike_type free_type 
 
extern int max_correct_args; 
PMOD_EXPORT extern struct pike_type *string0_type_string; 
PMOD_EXPORT extern struct pike_type *string_type_string; 
PMOD_EXPORT extern struct pike_type *int_type_string; 
PMOD_EXPORT extern struct pike_type *float_type_string; 
PMOD_EXPORT extern struct pike_type *object_type_string; 
PMOD_EXPORT extern struct pike_type *function_type_string; 
PMOD_EXPORT extern struct pike_type *program_type_string; 
PMOD_EXPORT extern struct pike_type *array_type_string; 
PMOD_EXPORT extern struct pike_type *multiset_type_string; 
PMOD_EXPORT extern struct pike_type *mapping_type_string; 
PMOD_EXPORT extern struct pike_type *type_type_string; 
PMOD_EXPORT extern struct pike_type *mixed_type_string; 
PMOD_EXPORT extern struct pike_type *void_type_string; 
PMOD_EXPORT extern struct pike_type *zero_type_string; 
PMOD_EXPORT extern struct pike_type *inheritable_type_string; 
PMOD_EXPORT extern struct pike_type *typeable_type_string; 
PMOD_EXPORT extern struct pike_type *enumerable_type_string; 
PMOD_EXPORT extern struct pike_type *any_type_string; 
PMOD_EXPORT extern struct pike_type *weak_type_string; 
extern struct pike_type *sscanf_type_string; 
PMOD_EXPORT extern struct pike_type *utf8_type_string; 
 
PMOD_EXPORT extern struct pike_string *literal_string_string; 
PMOD_EXPORT extern struct pike_string *literal_int_string; 
PMOD_EXPORT extern struct pike_string *literal_float_string; 
PMOD_EXPORT extern struct pike_string *literal_function_string; 
PMOD_EXPORT extern struct pike_string *literal_object_string; 
PMOD_EXPORT extern struct pike_string *literal_program_string; 
PMOD_EXPORT extern struct pike_string *literal_array_string; 
PMOD_EXPORT extern struct pike_string *literal_multiset_string; 
PMOD_EXPORT extern struct pike_string *literal_mapping_string; 
PMOD_EXPORT extern struct pike_string *literal_type_string; 
PMOD_EXPORT extern struct pike_string *literal_mixed_string; 
 
 
#define CONSTTYPE(X) make_pike_type(X) 
 
#ifdef DO_PIKE_CLEANUP 
struct pike_type_location 
{ 
  struct pike_type *t; 
  struct pike_type_location *next; 
}; 
 
extern struct pike_type_location *all_pike_type_locations; 
 
#define MAKE_CONSTANT_TYPE(T, X) do {         \ 
    static struct pike_type_location type_;     \ 
    if (!type_.t) {                             \ 
      type_.t = CONSTTYPE(X);                   \ 
      type_.next = all_pike_type_locations;     \ 
      all_pike_type_locations = &type_;         \ 
    }                                           \ 
    copy_pike_type((T), type_.t);               \ 
  } while(0) 
#else /* !DO_PIKE_CLEANUP */ 
#define MAKE_CONSTANT_TYPE(T, X) do { \ 
    static struct pike_type *type_;     \ 
    if (!type_) {                       \ 
      type_ = CONSTTYPE(X);             \ 
    }                                   \ 
    copy_pike_type((T), type_);         \ 
  } while(0) 
#endif /* DO_PIKE_CLEANUP */ 
 
#ifdef PIKE_DEBUG 
#define init_type_stack() type_stack_mark() 
#define exit_type_stack() do {\ 
    ptrdiff_t q_q_q_q = pop_stack_mark(); \ 
    if(q_q_q_q) Pike_fatal("Type stack out of wack! %ld\n", (long)q_q_q_q); \ 
  } while(0) 
#else 
#define init_type_stack type_stack_mark 
#define exit_type_stack pop_stack_mark 
#endif 
 
void debug_push_type(unsigned int type); 
void debug_push_reverse_type(unsigned int type); 
#ifdef DEBUG_MALLOC 
#define push_type(T) do { debug_push_type(T); debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_reverse_type(T) do { debug_push_reverse_type(T); debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#else /* !DEBUG_MALLOC */ 
#define push_type debug_push_type 
#define push_reverse_type debug_push_reverse_type 
#endif /* DEBUG_MALLOC */ 
 
extern void type_stack_mark(void); 
 
#define reset_type_stack() do {                       \ 
   type_stack_pop_to_mark();                    \ 
  type_stack_mark();                            \ 
} while(0) 
 
/* Prototypes begin here */ 
PMOD_EXPORT void really_free_pike_type(struct pike_type * t); 
PMOD_EXPORT ATTRIBUTE((malloc)) struct pike_type * alloc_pike_type(void); 
PMOD_EXPORT void count_memory_in_pike_types(size_t *n, size_t *s); 
void init_types(void); 
ptrdiff_t pop_stack_mark(void); 
void debug_pop_type_stack(unsigned int expected); 
void type_stack_pop_to_mark(void); 
void type_stack_reverse(void); 
struct pike_type *debug_peek_type_stack(void); 
void debug_push_int_type(INT_TYPE min, INT_TYPE max); 
void debug_push_object_type(int flag, INT32 id); 
void debug_push_object_type_backwards(int flag, INT32 id); 
void debug_push_type_attribute(struct pike_string *attr); 
void debug_push_type_name(struct pike_string *name); 
INT32 extract_type_int(char *p); 
void debug_push_unfinished_type(char *s); 
void debug_push_assign_type(int marker); 
void debug_push_finished_type(struct pike_type *type); 
void debug_push_finished_type_backwards(struct pike_type *type); 
void debug_push_scope_type(int level); 
struct pike_type *debug_pop_unfinished_type(void); 
void compiler_discard_type (void); 
struct pike_type *debug_pop_type(void); 
struct pike_type *debug_compiler_pop_type(void); 
struct pike_type *parse_type(const char *s); 
void stupid_describe_type(char *a, ptrdiff_t len); 
void simple_describe_type(struct pike_type *s); 
void low_describe_type(struct string_builder *s, struct pike_type *type); 
struct pike_string *describe_type(struct pike_type *type); 
TYPE_T compile_type_to_runtime_type(struct pike_type *s); 
int get_int_type_range(struct pike_type *t, INT_TYPE *range); 
struct pike_type *or_pike_types(struct pike_type *a, 
                                struct pike_type *b, 
                                int zero_implied); 
struct pike_type *and_pike_types(struct pike_type *a, 
                                 struct pike_type *b); 
int strict_check_call(struct pike_type *fun_type, struct pike_type *arg_type); 
int check_soft_cast(struct pike_type *to, struct pike_type *from); 
int match_types(struct pike_type *a,struct pike_type *b); 
int pike_types_le(struct pike_type *a, struct pike_type *b); 
int check_variant_overload(struct pike_type *a, struct pike_type *b); 
struct pike_type *index_type(struct pike_type *type, 
                             struct pike_type *type_of_index, 
                             node *n); 
struct pike_type *range_type(struct pike_type *type, 
                             struct pike_type *index1_type, 
                             struct pike_type *index2_type); 
struct pike_type *array_value_type(struct pike_type *array_type); 
struct pike_type *key_type(struct pike_type *type, node *n); 
int check_indexing(struct pike_type *type, 
                   struct pike_type *type_of_index, 
                   node *n); 
int count_arguments(struct pike_type *s); 
int minimum_arguments(struct pike_type *s); 
struct pike_type *check_call(struct pike_type *args, 
                             struct pike_type *type, 
                             int strict); 
struct pike_type *get_argument_type(struct pike_type *fun, int arg_no); 
struct pike_type *soft_cast(struct pike_type *soft_type, 
                            struct pike_type *orig_type, 
                            int flags); 
struct pike_type *check_call_svalue(struct pike_type *fun_type, 
                                    INT32 flags, 
                                    struct svalue *sval); 
struct pike_type *low_new_check_call(struct pike_type *fun_type, 
                                     struct pike_type *arg_type, 
                                     INT32 flags, 
                                     struct svalue *sval); 
struct pike_type *new_get_return_type(struct pike_type *fun_type, 
                                      INT32 flags); 
struct pike_type *get_first_arg_type(struct pike_type *fun_type, 
                                     INT32 flags); 
struct pike_type *check_splice_call(struct pike_string *fun_name, 
                                    struct pike_type *fun_type, 
                                    INT32 argno, 
                                    struct pike_type *arg_type, 
                                    struct svalue *sval, 
                                    INT32 flags); 
struct pike_type *new_check_call(struct pike_string *fun_name, 
                                 struct pike_type *fun_type, 
                                 node *args, INT32 *argno, INT32 flags); 
struct pike_type *zzap_function_return(struct pike_type *t, 
                                       struct pike_type *fun_ret); 
struct pike_type *get_lax_type_of_svalue( const struct svalue *s ); 
struct pike_type *get_type_of_svalue(const struct svalue *s); 
struct pike_type *object_type_to_program_type(struct pike_type *obj_t); 
PMOD_EXPORT char *get_name_of_type(TYPE_T t); 
void cleanup_pike_types(void); 
void cleanup_pike_type_table(void); 
PMOD_EXPORT void *find_type(struct pike_type *t, 
                            void *(*cb)(struct pike_type *)); 
PMOD_EXPORT void visit_type (struct pike_type *t, int action, void *extra); 
void gc_mark_type_as_referenced(struct pike_type *t); 
void gc_check_type (struct pike_type *t); 
void gc_check_all_types (void); 
int type_may_overload(struct pike_type *type, int lfun); 
void yyexplain_nonmatching_types(int severity_level, 
                                 struct pike_string *a_file, 
                                 INT32 a_line, 
                                 struct pike_type *type_a, 
                                 struct pike_string *b_file, 
                                 INT32 b_line, 
                                 struct pike_type *type_b); 
void string_builder_explain_nonmatching_types(struct string_builder *s, 
                                              struct pike_type *type_a, 
                                              struct pike_type *type_b); 
struct pike_type *debug_make_pike_type(const char *t); 
struct pike_string *type_to_string(struct pike_type *t); 
int pike_type_allow_premature_toss(struct pike_type *type); 
void register_attribute_handler(struct pike_string *attr, 
                                struct svalue *handler); 
 
/* used by the precompiler to get the correct object types */ 
PMOD_EXPORT void set_program_id_to_id( int (*to)(int) ); 
 
/* Prototypes end here */ 
 
#define visit_type_ref(T, REF_TYPE, EXTRA)                    \ 
  visit_ref (pass_type (T), (REF_TYPE),                         \ 
             (visit_thing_fn *) &visit_type, (EXTRA)) 
 
#ifdef DEBUG_MALLOC 
#define pop_type() ((struct pike_type *)debug_malloc_pass(debug_pop_type())) 
#define compiler_pop_type() ((struct pike_type *)debug_malloc_pass(debug_compiler_pop_type())) 
#define pop_unfinished_type() \ 
 ((struct pike_type *)debug_malloc_pass(debug_pop_unfinished_type())) 
#define make_pike_type(X) \ 
 ((struct pike_type *)debug_malloc_pass(debug_make_pike_type(X))) 
#define peek_type_stack() ((struct pike_type *)debug_malloc_pass(debug_peek_type_stack())) 
#define pop_type_stack(E) do { debug_malloc_pass(debug_peek_type_stack()); debug_pop_type_stack(E); } while(0) 
#define push_int_type(MIN,MAX) do { debug_push_int_type(MIN,MAX);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_object_type(FLAG,ID) do { debug_push_object_type(FLAG,ID);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_object_type_backwards(FLAG,ID) do { debug_push_object_type_backwards(FLAG,ID);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_scope_type(LEVEL) do { debug_push_scope_type(LEVEL);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_type_attribute(ATTR) do { debug_push_type_attribute((struct pike_string *)debug_malloc_pass(ATTR));debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_type_name(NAME) do { debug_push_type_name((struct pike_string *)debug_malloc_pass(NAME));debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_unfinished_type(S) ERROR 
#define push_assign_type(MARKER) do { debug_push_assign_type(MARKER);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_finished_type(T) do { debug_push_finished_type((struct pike_type *)debug_malloc_pass(T));debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_finished_type_with_markers(T,M,MS) do { debug_push_finished_type_with_markers((struct pike_type *)debug_malloc_pass(T),M,MS);debug_malloc_pass(debug_peek_type_stack()); } while(0) 
#define push_finished_type_backwards(T) ERROR 
#else 
#define make_pike_type debug_make_pike_type 
#define pop_type debug_pop_type 
#define compiler_pop_type debug_compiler_pop_type 
#define pop_unfinished_type debug_pop_unfinished_type 
#define peek_type_stack debug_peek_type_stack 
#define pop_type_stack debug_pop_type_stack 
#define push_int_type debug_push_int_type 
#define push_object_type debug_push_object_type 
#define push_object_type_backwards debug_push_object_type_backwards 
#define push_scope_type debug_push_scope_type 
#define push_type_attribute debug_push_type_attribute 
#define push_type_name debug_push_type_name 
#define push_unfinished_type debug_push_unfinished_type 
#define push_assign_type debug_push_assign_type 
#define push_finished_type debug_push_finished_type 
#define push_finished_type_with_markers debug_push_finished_type_with_markers 
#define push_finished_type_backwards debug_push_finished_type_backwards 
#endif 
 
#endif