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#include <ruby.h>
#include <ruby/st.h>
static void
numhash_free(void *ptr)
{
if (ptr) st_free_table(ptr);
}
static VALUE
numhash_alloc(VALUE klass)
{
return Data_Wrap_Struct(klass, 0, numhash_free, 0);
}
static VALUE
numhash_init(VALUE self)
{
st_table *tbl = (st_table *)DATA_PTR(self);
if (tbl) st_free_table(tbl);
DATA_PTR(self) = st_init_numtable();
return self;
}
static VALUE
numhash_aref(VALUE self, VALUE key)
{
st_data_t data;
if (!SPECIAL_CONST_P(key)) rb_raise(rb_eArgError, "not a special const");
if (st_lookup((st_table *)DATA_PTR(self), (st_data_t)key, &data))
return (VALUE)data;
return Qnil;
}
static VALUE
numhash_aset(VALUE self, VALUE key, VALUE data)
{
if (!SPECIAL_CONST_P(key)) rb_raise(rb_eArgError, "not a special const");
if (!SPECIAL_CONST_P(data)) rb_raise(rb_eArgError, "not a special const");
st_insert((st_table *)DATA_PTR(self), (st_data_t)key, (st_data_t)data);
return self;
}
static int
numhash_i(st_data_t key, st_data_t value, st_data_t arg, int error)
{
VALUE ret;
if (key == 0 && value == 0 && error == 1) rb_raise(rb_eRuntimeError, "numhash modified");
ret = rb_yield_values(3, (VALUE)key, (VALUE)value, (VALUE)arg);
if (ret == Qtrue) return ST_CHECK;
return ST_CONTINUE;
}
static VALUE
numhash_each(VALUE self)
{
return st_foreach((st_table *)DATA_PTR(self), numhash_i, self) ? Qtrue : Qfalse;
}
static int
update_func(st_data_t key, st_data_t *value, st_data_t arg)
{
VALUE ret = rb_yield_values(2, (VALUE)key, (VALUE)*value);
switch (ret) {
case Qfalse:
return ST_STOP;
case Qnil:
return ST_DELETE;
default:
*value = ret;
return ST_CONTINUE;
}
}
static VALUE
numhash_update(VALUE self, VALUE key)
{
if (st_update((st_table *)DATA_PTR(self), (st_data_t)key, update_func, 0))
return Qtrue;
else
return Qfalse;
}
void
Init_numhash(void)
{
VALUE st = rb_define_class_under(rb_define_module("Bug"), "StNumHash", rb_cData);
rb_define_alloc_func(st, numhash_alloc);
rb_define_method(st, "initialize", numhash_init, 0);
rb_define_method(st, "[]", numhash_aref, 1);
rb_define_method(st, "[]=", numhash_aset, 2);
rb_define_method(st, "each", numhash_each, 0);
rb_define_method(st, "update", numhash_update, 1);
}
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