Respect tokenizer.ggml.add_bos_token value when tokenizing (#4040)

* gguf-py: gguf-dump: Respect --no-tensor flag in JSON mode.

* Respect add_bos_token GGUF metadata value

* gguf-py: Try to fix SpecialVocab giving up too easily for the Nth time

1 files changed, 32 insertions, 0 deletions

diff --git a/llama.cpp b/llama.cpp
index 92c4536c..3f6b7fe7 100644
--- a/llama.cpp
+++ b/llama.cpp
@@ -255,6 +255,8 @@ enum llm_kv {
     LLM_KV_TOKENIZER_UNK_ID,
     LLM_KV_TOKENIZER_SEP_ID,
     LLM_KV_TOKENIZER_PAD_ID,
+    LLM_KV_TOKENIZER_ADD_BOS,
+    LLM_KV_TOKENIZER_ADD_EOS,
     LLM_KV_TOKENIZER_HF_JSON,
     LLM_KV_TOKENIZER_RWKV,
 };
@@ -303,6 +305,8 @@ static std::map<llm_kv, std::string> LLM_KV_NAMES = {
     { LLM_KV_TOKENIZER_UNK_ID,              "tokenizer.ggml.unknown_token_id"   },
     { LLM_KV_TOKENIZER_SEP_ID,              "tokenizer.ggml.seperator_token_id" },
     { LLM_KV_TOKENIZER_PAD_ID,              "tokenizer.ggml.padding_token_id"   },
+    { LLM_KV_TOKENIZER_ADD_BOS,             "tokenizer.ggml.add_bos_token"      },
+    { LLM_KV_TOKENIZER_ADD_EOS,             "tokenizer.ggml.add_eos_token"      },
     { LLM_KV_TOKENIZER_HF_JSON,             "tokenizer.huggingface.json"        },
     { LLM_KV_TOKENIZER_RWKV,                "tokenizer.rwkv.world"              },
 };
@@ -1276,6 +1280,9 @@ struct llama_vocab {
     id special_sep_id = -1;
     id special_pad_id = -1;
 
+    int special_add_bos = -1; // -1 unknown, 1 add, 0 don't add.
+    int special_add_eos = -1; // -1 unknown, 1 add, 0 don't add.
+
     id linefeed_id       = 13;
     id special_prefix_id = 32007;
     id special_middle_id = 32009;
@@ -2388,6 +2395,23 @@ static void llm_load_vocab(
                     __func__, key.c_str(), id, old_id);
                 id = old_id;
             }
+
+        }
+
+        // Handle add_bos_token and add_eos_token
+        std::string key = kv(LLM_KV_TOKENIZER_ADD_BOS);
+        int kid = gguf_find_key(ctx, key.c_str());
+        enum gguf_type ktype = kid < 0 ? GGUF_TYPE_COUNT : gguf_get_kv_type(ctx, kid);
+        vocab.special_add_bos = ktype == GGUF_TYPE_BOOL ? gguf_get_val_bool(ctx, kid) : -1;
+        if (ktype != GGUF_TYPE_BOOL && ktype != GGUF_TYPE_COUNT) {
+            LLAMA_LOG_WARN("%s: bad field type %d for '%s' - ignoring\n", __func__, ktype, key.c_str());
+        }
+        key = kv(LLM_KV_TOKENIZER_ADD_EOS);
+        kid = gguf_find_key(ctx, key.c_str());
+        ktype = kid < 0 ? GGUF_TYPE_COUNT : gguf_get_kv_type(ctx, kid);
+        vocab.special_add_eos = ktype == GGUF_TYPE_BOOL ? gguf_get_val_bool(ctx, kid) : -1;
+        if (ktype != GGUF_TYPE_BOOL && ktype != GGUF_TYPE_COUNT) {
+            LLAMA_LOG_WARN("%s: bad field type %d for '%s' - ignoring\n", __func__, ktype, key.c_str());
         }
     }
 
@@ -9288,6 +9312,14 @@ llama_token llama_token_nl(const struct llama_model * model) {
     return model->vocab.linefeed_id;
 }
 
+int llama_add_bos_token(const struct llama_model * model) {
+    return model->vocab.special_add_bos;
+}
+
+int llama_add_eos_token(const struct llama_model * model) {
+    return model->vocab.special_add_eos;
+}
+
 llama_token llama_token_prefix(const struct llama_model * model) {
     return model->vocab.special_prefix_id;
 }