1 files changed, 113 insertions, 0 deletions
diff --git a/tests/test-tokenizer-1-bpe.cpp b/tests/test-tokenizer-1-bpe.cpp
new file mode 100644
index 00000000..85a59a14
--- /dev/null
+++ b/tests/test-tokenizer-1-bpe.cpp
@@ -0,0 +1,113 @@
+#include "llama.h"
+#include "common.h"
+#include "unicode.h"
+#include "console.h"
+
+#include <cassert>
+#include <cstdio>
+#include <cstring>
+#include <string>
+#include <codecvt>
+#include <map>
+#include <vector>
+#include <locale>
+
+int main(int argc, char **argv) {
+    if (argc < 2) {
+        fprintf(stderr, "Usage: %s <vocab-file>\n", argv[0]);
+        return 1;
+    }
+
+    const std::string fname = argv[1];
+
+    fprintf(stderr, "%s : reading vocab from: '%s'\n", __func__, fname.c_str());
+
+    llama_model * model;
+    llama_context * ctx;
+
+    llama_backend_init(false);
+
+    // load the vocab
+    {
+        auto mparams = llama_model_default_params();
+
+        mparams.vocab_only = true;
+
+        model = llama_load_model_from_file(fname.c_str(), mparams);
+
+        if (model == NULL) {
+            fprintf(stderr, "%s: error: failed to load vocab '%s'\n", __func__, fname.c_str());
+            return 1;
+        }
+
+        auto cparams = llama_context_default_params();
+
+        ctx = llama_new_context_with_model(model, cparams);
+
+        if (ctx == NULL) {
+            fprintf(stderr, "%s: error: failed to load vocab '%s'\n", __func__, fname.c_str());
+            llama_free_model(model);
+            return 1;
+        }
+    }
+
+    GGML_ASSERT(llama_vocab_type(model) == LLAMA_VOCAB_TYPE_BPE);
+
+#ifdef _WIN32
+    // We need this for unicode console support
+    console::init(false, false);
+    atexit([]() { console::cleanup(); });
+#endif
+
+    const int n_vocab = llama_n_vocab(model);
+
+    for (int i = 0; i < n_vocab; ++i) {
+        std::string str = llama_detokenize_bpe(ctx, std::vector<int>(1, i));
+        try {
+            auto cps = codepoints_from_utf8(str);
+            std::vector<llama_token> tokens = llama_tokenize(ctx, str, false);
+            std::string check = llama_detokenize_bpe(ctx, tokens);
+            if (check != str) {
+                fprintf(stderr, "%s : error: token %d detokenizes to '%s'(%zu) but tokenization of this detokenizes to '%s'(%zu)\n",
+                    __func__, i, str.c_str(), str.length(), check.c_str(), check.length());
+                return 2;
+            }
+        }
+        catch (const std::invalid_argument &) {
+            fprintf(stderr, "%s : info: utf8 conversion %d '%s'\n", __func__, i, str.c_str());
+        }
+    }
+
+    for (uint32_t cp = 0x0000; cp < 0xffff; ++cp) {
+        // NOTE: these exceptions seem to be necessary, because the GPT2 tokenizer doesn't want to interfere with some ASCII control characters
+        if ((cp < 0x03 || cp > 0x05) && cp != 0x0b && cp != 0x11 && (cp < 0x13 || cp > 0x17) && cp != 0x19 && (cp < 0x1c || cp > 0x1e) && (cp < 0xd800 || cp > 0xdfff)) {
+            std::string str = " " + codepoint_to_utf8(cp);
+            std::vector<llama_token> tokens = llama_tokenize(ctx, str, false);
+            std::string check = llama_detokenize_bpe(ctx, tokens);
+            if (str != check) {
+                fprintf(stderr, "%s : error: codepoint %x detokenizes to '%s'(%zu) instead of '%s'(%zu)\n",
+                    __func__, cp, check.c_str(), check.length(), str.c_str(), str.length());
+                return 3;
+            }
+        }
+    }
+    // TODO: why doesn't this work for the full range of Unicodes?
+    // for (uint32_t cp = 0x10000; cp < 0x0010ffff; ++cp) {
+    for (uint32_t cp = 0x10000; cp < 0x00080000; ++cp) {
+        std::string str = codepoint_to_utf8(cp);
+        std::vector<llama_token> tokens = llama_tokenize(ctx, str, false);
+        std::string check = llama_detokenize_bpe(ctx, tokens);
+        if (str != check) {
+            fprintf(stderr, "%s : error: codepoint %x detokenizes to '%s'(%zu) instead of '%s'(%zu)\n",
+                __func__, cp, check.c_str(), check.length(), str.c_str(), str.length());
+            return 4;
+        }
+    }
+
+    llama_free_model(model);
+    llama_free(ctx);
+
+    llama_backend_free();
+
+    return 0;
+}