llama.cpp/examples/gguf/gguf.cpp

247 lines
7.4 KiB
C++

#include "ggml.h"
#include "llama.h"
#include <cstdio>
#include <cinttypes>
#include <string>
#include <sstream>
#include <fstream>
#include <vector>
#undef MIN
#undef MAX
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
template<typename T>
static std::string to_string(const T & val) {
std::stringstream ss;
ss << val;
return ss.str();
}
bool gguf_ex_write(const std::string & fname) {
struct gguf_context * ctx = gguf_init_empty();
gguf_set_val_u8 (ctx, "some.parameter.uint8", 0x12);
gguf_set_val_i8 (ctx, "some.parameter.int8", -0x13);
gguf_set_val_u16 (ctx, "some.parameter.uint16", 0x1234);
gguf_set_val_i16 (ctx, "some.parameter.int16", -0x1235);
gguf_set_val_u32 (ctx, "some.parameter.uint32", 0x12345678);
gguf_set_val_i32 (ctx, "some.parameter.int32", -0x12345679);
gguf_set_val_f32 (ctx, "some.parameter.float32", 0.123456789f);
gguf_set_val_bool(ctx, "some.parameter.bool", true);
gguf_set_val_str (ctx, "some.parameter.string", "hello world");
gguf_set_arr_data(ctx, "some.parameter.arr.i16", GGUF_TYPE_INT16, std::vector<int16_t>{ 1, 2, 3, 4, }.data(), 4);
gguf_set_arr_data(ctx, "some.parameter.arr.f32", GGUF_TYPE_FLOAT32, std::vector<float>{ 3.145f, 2.718f, 1.414f, }.data(), 3);
gguf_set_arr_str (ctx, "some.parameter.arr.str", std::vector<const char *>{ "hello", "world", "!" }.data(), 3);
struct ggml_init_params params = {
/*.mem_size =*/ 128ull*1024ull*1024ull,
/*.mem_buffer =*/ NULL,
/*.no_alloc =*/ false,
};
struct ggml_context * ctx_data = ggml_init(params);
const int n_tensors = 10;
// tensor infos
for (int i = 0; i < n_tensors; ++i) {
const std::string name = "tensor_" + to_string(i);
int64_t ne[GGML_MAX_DIMS] = { 1 };
int32_t n_dims = rand() % GGML_MAX_DIMS + 1;
for (int j = 0; j < n_dims; ++j) {
ne[j] = rand() % 10 + 1;
}
struct ggml_tensor * cur = ggml_new_tensor(ctx_data, GGML_TYPE_F32, n_dims, ne);
ggml_set_name(cur, name.c_str());
{
float * data = (float *) cur->data;
for (int j = 0; j < ggml_nelements(cur); ++j) {
data[j] = 100 + i;
}
}
gguf_add_tensor(ctx, cur);
}
gguf_write_to_file(ctx, fname.c_str(), false);
fprintf(stdout, "%s: wrote file '%s;\n", __func__, fname.c_str());
ggml_free(ctx_data);
gguf_free(ctx);
return true;
}
// just read tensor info
bool gguf_ex_read_0(const std::string & fname) {
struct gguf_init_params params = {
/*.no_alloc = */ false,
/*.ctx = */ NULL,
};
struct gguf_context * ctx = gguf_init_from_file(fname.c_str(), params);
fprintf(stdout, "%s: version: %d\n", __func__, gguf_get_version(ctx));
fprintf(stdout, "%s: alignment: %zu\n", __func__, gguf_get_alignment(ctx));
fprintf(stdout, "%s: data offset: %zu\n", __func__, gguf_get_data_offset(ctx));
// kv
{
const int n_kv = gguf_get_n_kv(ctx);
fprintf(stdout, "%s: n_kv: %d\n", __func__, n_kv);
for (int i = 0; i < n_kv; ++i) {
const char * key = gguf_get_key(ctx, i);
fprintf(stdout, "%s: kv[%d]: key = %s\n", __func__, i, key);
}
}
// find kv string
{
const char * findkey = "some.parameter.string";
const int keyidx = gguf_find_key(ctx, findkey);
if (keyidx == -1) {
fprintf(stdout, "%s: find key: %s not found.\n", __func__, findkey);
} else {
const char * key_value = gguf_get_val_str(ctx, keyidx);
fprintf(stdout, "%s: find key: %s found, kv[%d] value = %s\n", __func__, findkey, keyidx, key_value);
}
}
// tensor info
{
const int n_tensors = gguf_get_n_tensors(ctx);
fprintf(stdout, "%s: n_tensors: %d\n", __func__, n_tensors);
for (int i = 0; i < n_tensors; ++i) {
const char * name = gguf_get_tensor_name (ctx, i);
const size_t offset = gguf_get_tensor_offset(ctx, i);
fprintf(stdout, "%s: tensor[%d]: name = %s, offset = %zu\n", __func__, i, name, offset);
}
}
gguf_free(ctx);
return true;
}
// read and create ggml_context containing the tensors and their data
bool gguf_ex_read_1(const std::string & fname) {
struct ggml_context * ctx_data = NULL;
struct gguf_init_params params = {
/*.no_alloc = */ false,
/*.ctx = */ &ctx_data,
};
struct gguf_context * ctx = gguf_init_from_file(fname.c_str(), params);
fprintf(stdout, "%s: version: %d\n", __func__, gguf_get_version(ctx));
fprintf(stdout, "%s: alignment: %zu\n", __func__, gguf_get_alignment(ctx));
fprintf(stdout, "%s: data offset: %zu\n", __func__, gguf_get_data_offset(ctx));
// kv
{
const int n_kv = gguf_get_n_kv(ctx);
fprintf(stdout, "%s: n_kv: %d\n", __func__, n_kv);
for (int i = 0; i < n_kv; ++i) {
const char * key = gguf_get_key(ctx, i);
fprintf(stdout, "%s: kv[%d]: key = %s\n", __func__, i, key);
}
}
// tensor info
{
const int n_tensors = gguf_get_n_tensors(ctx);
fprintf(stdout, "%s: n_tensors: %d\n", __func__, n_tensors);
for (int i = 0; i < n_tensors; ++i) {
const char * name = gguf_get_tensor_name (ctx, i);
const size_t offset = gguf_get_tensor_offset(ctx, i);
fprintf(stdout, "%s: tensor[%d]: name = %s, offset = %zu\n", __func__, i, name, offset);
}
}
// data
{
const int n_tensors = gguf_get_n_tensors(ctx);
for (int i = 0; i < n_tensors; ++i) {
fprintf(stdout, "%s: reading tensor %d data\n", __func__, i);
const char * name = gguf_get_tensor_name(ctx, i);
struct ggml_tensor * cur = ggml_get_tensor(ctx_data, name);
fprintf(stdout, "%s: tensor[%d]: n_dims = %d, name = %s, data = %p\n", __func__, i, cur->n_dims, cur->name, cur->data);
// print first 10 elements
const float * data = (const float *) cur->data;
printf("%s data[:10] : ", name);
for (int j = 0; j < MIN(10, ggml_nelements(cur)); ++j) {
printf("%f ", data[j]);
}
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]);
return false;
}
}
}
}
}
fprintf(stdout, "%s: ctx_data size: %zu\n", __func__, ggml_get_mem_size(ctx_data));
ggml_free(ctx_data);
gguf_free(ctx);
return true;
}
int main(int argc, char ** argv) {
if (argc < 3) {
fprintf(stdout, "usage: %s data.gguf r|w\n", argv[0]);
return -1;
}
const std::string fname(argv[1]);
const std::string mode (argv[2]);
GGML_ASSERT((mode == "r" || mode == "w") && "mode must be r or w");
if (mode == "w") {
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");
}
return 0;
}