llama: update vendored code to commit 40c6d79f (#7875)

llama/sampling.h

@@ -1,5 +1,5 @@
 /**
- * llama.cpp - commit 3f1ae2e32cde00c39b96be6d01c2997c29bae555 - do not edit this file
+ * llama.cpp - commit 40c6d79fb52f995f47507fedfeaae2ac05d9b35c - do not edit this file
  *
  * MIT License
  *
@@ -33,7 +33,7 @@
 #include <string>
 #include <vector>
 
-// gpt_sampler extends llama_sampler with additional functionality:
+// common_sampler extends llama_sampler with additional functionality:
 //
 //  - grammar support
 //  - custom sampler logic based on the parameters
@@ -49,30 +49,30 @@
 // token in order to verify if it fits the grammar. And only if the token doesn't fit the grammar, the
 // grammar constraints are applied to the full vocabulary and the token is resampled.
 //
-// The gpt_sampler also maintains a container with the last accepted tokens. In the future, this can
+// The common_sampler also maintains a container with the last accepted tokens. In the future, this can
 // be moved into the core llama library.
 //
-// For convenience, the gpt_sampler also maintains a container with the current candidate tokens.
+// For convenience, the common_sampler also maintains a container with the current candidate tokens.
 // This can be used to access the probabilities of the rest of the non-sampled tokens.
 //
 // TODO: measure grammar performance
 //
 
-struct gpt_sampler;
+struct common_sampler;
 
 // llama_sampler API overloads
 
-struct gpt_sampler * gpt_sampler_init(const struct llama_model * model, const struct gpt_sampler_params & params);
+struct common_sampler * common_sampler_init(const struct llama_model * model, const struct common_params_sampling & params);
 
-void gpt_sampler_free(struct gpt_sampler * gsmpl);
+void common_sampler_free(struct common_sampler * gsmpl);
 
 // if accept_grammar is true, the token is accepted both by the sampling chain and the grammar
-void                 gpt_sampler_accept(struct gpt_sampler * gsmpl, llama_token token, bool accept_grammar);
-void                 gpt_sampler_reset (struct gpt_sampler * gsmpl);
-struct gpt_sampler * gpt_sampler_clone (struct gpt_sampler * gsmpl);
+void                    common_sampler_accept(struct common_sampler * gsmpl, llama_token token, bool accept_grammar);
+void                    common_sampler_reset (struct common_sampler * gsmpl);
+struct common_sampler * common_sampler_clone (struct common_sampler * gsmpl);
 
 // arguments can be nullptr to skip printing
-void gpt_perf_print(const struct llama_context * ctx, const struct gpt_sampler * gsmpl);
+void common_perf_print(const struct llama_context * ctx, const struct common_sampler * gsmpl);
 
 // extended sampling implementation:
 //
@@ -84,26 +84,47 @@ void gpt_perf_print(const struct llama_context * ctx, const struct gpt_sampler *
 // if grammar_first is true, the grammar is applied before the samplers (slower)
 // useful in cases where all the resulting candidates (not just the sampled one) must fit the grammar
 //
-llama_token gpt_sampler_sample(struct gpt_sampler * gsmpl, struct llama_context * ctx, int idx, bool grammar_first = false);
+llama_token common_sampler_sample(struct common_sampler * gsmpl, struct llama_context * ctx, int idx, bool grammar_first = false);
 
-uint32_t gpt_sampler_get_seed(const struct gpt_sampler * gsmpl);
+// generalized version of common_sampler_sample
+//
+// will cross-reference the sampled tokens with a batch of draft tokens and accept those that match
+// if the sampler disagrees at some point, we stop and return the accepted tokens up to now
+//
+//      common_sampler_sample_n(gsmpl, ctx, { idx }, {});
+//
+// is equivalent to
+//
+//      common_sampler_sample(gsmpl, ctx, idx);
+//      common_sampler_accept(gsmpl, token, true);
+//
+// requires: idxs.size() == draft.size() + 1
+//
+// returns at least 1 token, up to idxs.size()
+//
+std::vector<llama_token> common_sampler_sample_and_accept_n(struct common_sampler * gsmpl, struct llama_context * ctx, const std::vector<int> & idxs, const llama_tokens & draft, bool grammar_first = false);
+
+// assume idxs == [ 0, 1, 2, ..., draft.size() ]
+std::vector<llama_token> common_sampler_sample_and_accept_n(struct common_sampler * gsmpl, struct llama_context * ctx, const llama_tokens & draft, bool grammar_first = false);
+
+uint32_t common_sampler_get_seed(const struct common_sampler * gsmpl);
 
 // helpers
 
 // access the internal list of current candidate tokens
-llama_token_data_array * gpt_sampler_get_candidates(struct gpt_sampler * gsmpl);
+llama_token_data_array * common_sampler_get_candidates(struct common_sampler * gsmpl);
 
 // get the last accepted token
-llama_token gpt_sampler_last(const struct gpt_sampler * gsmpl);
+llama_token common_sampler_last(const struct common_sampler * gsmpl);
 
 // print the sampler chain into a string
-std::string gpt_sampler_print(const struct gpt_sampler * gsmpl);
+std::string common_sampler_print(const struct common_sampler * gsmpl);
 
 // get a string representation of the last accepted tokens
-std::string gpt_sampler_prev_str(gpt_sampler * gsmpl, llama_context * ctx, int n);
+std::string common_sampler_prev_str(common_sampler * gsmpl, llama_context * ctx, int n);
 
-char        gpt_sampler_type_to_chr(enum gpt_sampler_type cnstr);
-std::string gpt_sampler_type_to_str(enum gpt_sampler_type cnstr);
+char        common_sampler_type_to_chr(enum common_sampler_type cnstr);
+std::string common_sampler_type_to_str(enum common_sampler_type cnstr);
 
-std::vector<enum gpt_sampler_type> gpt_sampler_types_from_names(const std::vector<std::string> & names, bool allow_alt_names);
-std::vector<enum gpt_sampler_type> gpt_sampler_types_from_chars(const std::string & chars);
+std::vector<enum common_sampler_type> common_sampler_types_from_names(const std::vector<std::string> & names, bool allow_alt_names);
+std::vector<enum common_sampler_type> common_sampler_types_from_chars(const std::string & chars);