gguf: add option to not check tensor data

This commit adds an option to the gguf example to not check the tensor
data.

The motivation for this is that it can be nice to use the gguf tool to
read other .gguf files that were not created by the gguf tool.

Signed-off-by: Daniel Bevenius <[email protected]>

examples/gguf/gguf.cpp

@@ -142,7 +142,7 @@ static bool gguf_ex_read_0(const std::string & fname) {
 }
 
 // read and create ggml_context containing the tensors and their data
-static bool gguf_ex_read_1(const std::string & fname) {
+static bool gguf_ex_read_1(const std::string & fname, bool check_data) {
     struct ggml_context * ctx_data = NULL;
 
     struct gguf_init_params params = {
@@ -206,13 +206,15 @@ static bool gguf_ex_read_1(const std::string & fname) {
             printf("\n\n");
 
             // check data
-            {
-                const float * data = (const float *) cur->data;
-                for (int j = 0; j < ggml_nelements(cur); ++j) {
-                    if (data[j] != 100 + i) {
-                        fprintf(stderr, "%s: tensor[%d]: data[%d] = %f\n", __func__, i, j, data[j]);
-                        gguf_free(ctx);
-                        return false;
+            if (check_data) {
+                {
+                    const float * data = (const float *) cur->data;
+                    for (int j = 0; j < ggml_nelements(cur); ++j) {
+                        if (data[j] != 100 + i) {
+                            fprintf(stderr, "%s: tensor[%d]: data[%d] = %f\n", __func__, i, j, data[j]);
+                            gguf_free(ctx);
+                            return false;
+                        }
                     }
                 }
             }
@@ -229,9 +231,16 @@ static bool gguf_ex_read_1(const std::string & fname) {
 
 int main(int argc, char ** argv) {
     if (argc < 3) {
-        printf("usage: %s data.gguf r|w\n", argv[0]);
+        printf("usage: %s data.gguf r|w [n]\n", argv[0]);
+        printf("r: read data.gguf file\n");
+        printf("w: write data.gguf file\n");
+        printf("n: no check of tensor data\n");
         return -1;
     }
+    bool check_data = true;
+    if (argc == 4) {
+        check_data = false;
+    }
 
     const std::string fname(argv[1]);
     const std::string mode (argv[2]);
@@ -242,7 +251,7 @@ int main(int argc, char ** argv) {
         GGML_ASSERT(gguf_ex_write(fname) && "failed to write gguf file");
     } else if (mode == "r") {
         GGML_ASSERT(gguf_ex_read_0(fname) && "failed to read gguf file");
-        GGML_ASSERT(gguf_ex_read_1(fname) && "failed to read gguf file");
+        GGML_ASSERT(gguf_ex_read_1(fname, check_data) && "failed to read gguf file");
     }
 
     return 0;