| … | |
… | |
| 170 | } |
170 | } |
| 171 | |
171 | |
| 172 | // uniform distribution, [0 .. num - 1] |
172 | // uniform distribution, [0 .. num - 1] |
| 173 | uint32_t operator ()(uint32_t num) |
173 | uint32_t operator ()(uint32_t num) |
| 174 | { |
174 | { |
| 175 | return !is_constant (num) ? get_range (num) // non-constant |
175 | return !ecb_is_constant (num) ? get_range (num) // non-constant |
| 176 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
176 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
| 177 | : this->next () & (num - 1); // constant, power-of-two |
177 | : this->next () & (num - 1); // constant, power-of-two |
| 178 | } |
178 | } |
| 179 | |
179 | |
| 180 | // return a number within the closed interval [min .. max], max can be >, < or == min. |
180 | // return a number within the closed interval [min .. max], max can be >, < or == min. |
| 181 | int operator () (int r_min, int r_max) |
181 | int operator () (int r_min, int r_max) |
| 182 | { |
182 | { |
| 183 | return is_constant (r_min <= r_max) && r_min <= r_max |
183 | return ecb_is_constant (r_min <= r_max) && r_min <= r_max |
| 184 | ? r_min + operator ()(r_max - r_min + 1) |
184 | ? r_min + operator ()(r_max - r_min + 1) |
| 185 | : get_range (r_min, r_max); |
185 | : get_range (r_min, r_max); |
| 186 | } |
186 | } |
| 187 | |
187 | |
| 188 | uint32_t get_u32 (); |
188 | uint32_t get_u32 (); |
