Last Modified
2014-09-19 21:53:51 -0700



Basic header of mruby. It includes mrbconf.h, mruby/value.h, mruby/version.h internally.

mrb_state management


mrb_state* mrb_open();

Creates new mrb_state.


typedef void* (*mrb_allocf) (struct mrb_state *mrb, void *ptr, size_t s, void *ud);

Function pointer type of custom allocator used in mrb_open_allocf.

The function pointing it must behave similarly as realloc except: * If ptr is NULL it must allocate new space. * If s is NULL, ptr must be freed.


mrb_state* mrb_open_allocf(mrb_allocf f, void *ud);

Create new mrb_state with custom allocator. ud will be passed to custom allocator f. If user data isn’t required just pass NULL. Function pointer f must satisfy requirements of its type.


void mrb_close(mrb_state *mrb);

Deletes mrb_state.



int mrb_get_args(mrb_state *mrb, const char *format, ...);

Retrieve arguments from mrb_state. Use it inside a function pointed by mrb_func_t. It returns number of function retrieved. format is a list of following format specifier:

char|mruby type|retrieve types|note :—:|———-|————–|— o|Object|mrb_value|Could be used to retreive any type of argument C|Class/Module|mrb_value| S|String|mrb_value| A|Array|mrb_value| H|Hash|mrb_value| s|String|char*, mrb_int| z|String|char*| a|Array|mrb_value*, mrb_int| f|Float|mrb_float| i|Integer|mrb_int| b|boolean|mrb_bool| n|Symbol|mrb_sym| &|block|mrb_value| *|rest arguments|mrb_value*, mrb_int|Receive the rest of arguments as an array. ||optional||After this spec following specs would be optional. ?|optional given|mrb_bool|True if preceding argument is given. Used to check optional argument is given.

The passing variadic arguments must be a pointer of retrieving type.

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