| enum common_reasoning_budget_state { | |
| REASONING_BUDGET_IDLE, // waiting for start sequence | |
| REASONING_BUDGET_COUNTING, // counting down tokens | |
| REASONING_BUDGET_FORCING, // forcing budget message + end sequence | |
| REASONING_BUDGET_WAITING_UTF8, // budget exhausted, waiting for UTF-8 completion | |
| REASONING_BUDGET_DONE, // passthrough forever | |
| }; | |
| // Creates a reasoning budget sampler that limits token generation inside a | |
| // reasoning block (e.g. between <think> and </think>). | |
| // | |
| // State machine: IDLE -> COUNTING -> WAITING_UTF8 -> FORCING -> DONE | |
| // IDLE: passthrough, watching for start_tokens sequence | |
| // COUNTING: counting down remaining tokens, watching for natural end_tokens | |
| // WAITING_UTF8: budget exhausted, allowing tokens to complete a UTF-8 sequence | |
| // FORCING: forces forced_tokens token-by-token (all other logits -> -inf) | |
| // DONE: passthrough forever | |
| // | |
| // Parameters: | |
| // vocab - vocabulary (used for UTF-8 boundary detection; can be nullptr) | |
| // start_tokens - token sequence that activates counting | |
| // end_tokens - token sequence for natural deactivation | |
| // forced_tokens - token sequence forced when budget expires | |
| // budget - max tokens allowed in the reasoning block | |
| // initial_state - initial state of the sampler (e.g. IDLE or COUNTING) | |
| // note: COUNTING with budget <= 0 is promoted to FORCING | |
| // | |
| struct llama_sampler * common_reasoning_budget_init( | |
| const struct llama_vocab * vocab, | |
| const std::vector<llama_token> & start_tokens, | |
| const std::vector<llama_token> & end_tokens, | |
| const std::vector<llama_token> & forced_tokens, | |
| int32_t budget, | |
| common_reasoning_budget_state initial_state); | |