/usr/include/mruby/array.h is in libmruby-dev 0.0.0~20131214+git882afdea-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** mruby/array.h - Array class
**
** See Copyright Notice in mruby.h
*/
#ifndef MRUBY_ARRAY_H
#define MRUBY_ARRAY_H
#if defined(__cplusplus)
extern "C" {
#endif
typedef struct mrb_shared_array {
int refcnt;
mrb_value *ptr;
mrb_int len;
} mrb_shared_array;
struct RArray {
MRB_OBJECT_HEADER;
mrb_int len;
union {
mrb_int capa;
mrb_shared_array *shared;
} aux;
mrb_value *ptr;
};
#define mrb_ary_ptr(v) ((struct RArray*)(mrb_ptr(v)))
#define mrb_ary_value(p) mrb_obj_value((void*)(p))
#define RARRAY(v) ((struct RArray*)(mrb_ptr(v)))
#define RARRAY_LEN(a) (RARRAY(a)->len)
#define RARRAY_PTR(a) (RARRAY(a)->ptr)
#define MRB_ARY_SHARED 256
void mrb_ary_modify(mrb_state*, struct RArray*);
void mrb_ary_decref(mrb_state*, mrb_shared_array*);
mrb_value mrb_ary_new_capa(mrb_state*, mrb_int);
mrb_value mrb_ary_new(mrb_state *mrb);
mrb_value mrb_ary_new_from_values(mrb_state *mrb, mrb_int size, const mrb_value *vals);
void mrb_ary_concat(mrb_state*, mrb_value, mrb_value);
mrb_value mrb_ary_splat(mrb_state*, mrb_value);
void mrb_ary_push(mrb_state*, mrb_value, mrb_value);
mrb_value mrb_ary_pop(mrb_state *mrb, mrb_value ary);
mrb_value mrb_ary_aget(mrb_state *mrb, mrb_value self);
mrb_value mrb_ary_ref(mrb_state *mrb, mrb_value ary, mrb_int n);
void mrb_ary_set(mrb_state *mrb, mrb_value ary, mrb_int n, mrb_value val);
mrb_int mrb_ary_len(mrb_state *mrb, mrb_value ary);
void mrb_ary_replace(mrb_state *mrb, mrb_value a, mrb_value b);
mrb_value mrb_check_array_type(mrb_state *mrb, mrb_value self);
mrb_value mrb_ary_unshift(mrb_state *mrb, mrb_value self, mrb_value item);
mrb_value mrb_assoc_new(mrb_state *mrb, mrb_value car, mrb_value cdr);
mrb_value mrb_ary_entry(mrb_value ary, mrb_int offset);
mrb_value mrb_ary_shift(mrb_state *mrb, mrb_value self);
mrb_value mrb_ary_clear(mrb_state *mrb, mrb_value self);
mrb_value mrb_ary_join(mrb_state *mrb, mrb_value ary, mrb_value sep);
#if defined(__cplusplus)
} /* extern "C" { */
#endif
#endif /* MRUBY_ARRAY_H */
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