#include "common.h"
#include "llama.h"

#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstring>
#include <ctime>
#include <fstream>
#include <iterator>
#include <iostream>
#include <regex>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <cinttypes>

#if defined(__APPLE__) && defined(__MACH__)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif

#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#ifndef NOMINMAX
#   define NOMINMAX
#endif
#include <codecvt>
#include <locale>
#include <windows.h>
#include <fcntl.h>
#include <io.h>
#else
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <unistd.h>
#endif

#if defined(_MSC_VER)
#pragma warning(disable: 4244 4267) // possible loss of data
#endif

#if (defined(GGML_USE_CUBLAS) || defined(GGML_USE_SYCL))
#define GGML_USE_CUBLAS_SYCL
#endif

#if (defined(GGML_USE_CUBLAS) || defined(GGML_USE_SYCL)) || defined(GGML_USE_VULKAN)
#define GGML_USE_CUBLAS_SYCL_VULKAN
#endif

int32_t get_num_physical_cores() {
#ifdef __linux__
    // enumerate the set of thread siblings, num entries is num cores
    std::unordered_set<std::string> siblings;
    for (uint32_t cpu=0; cpu < UINT32_MAX; ++cpu) {
        std::ifstream thread_siblings("/sys/devices/system/cpu"
            + std::to_string(cpu) + "/topology/thread_siblings");
        if (!thread_siblings.is_open()) {
            break; // no more cpus
        }
        std::string line;
        if (std::getline(thread_siblings, line)) {
            siblings.insert(line);
        }
    }
    if (!siblings.empty()) {
        return static_cast<int32_t>(siblings.size());
    }
#elif defined(__APPLE__) && defined(__MACH__)
    int32_t num_physical_cores;
    size_t len = sizeof(num_physical_cores);
    int result = sysctlbyname("hw.perflevel0.physicalcpu", &num_physical_cores, &len, NULL, 0);
    if (result == 0) {
        return num_physical_cores;
    }
    result = sysctlbyname("hw.physicalcpu", &num_physical_cores, &len, NULL, 0);
    if (result == 0) {
        return num_physical_cores;
    }
#elif defined(_WIN32)
    //TODO: Implement
#endif
    unsigned int n_threads = std::thread::hardware_concurrency();
    return n_threads > 0 ? (n_threads <= 4 ? n_threads : n_threads / 2) : 4;
}

void process_escapes(std::string& input) {
    std::size_t input_len = input.length();
    std::size_t output_idx = 0;

    for (std::size_t input_idx = 0; input_idx < input_len; ++input_idx) {
        if (input[input_idx] == '\\' && input_idx + 1 < input_len) {
            switch (input[++input_idx]) {
                case 'n':  input[output_idx++] = '\n'; break;
                case 'r':  input[output_idx++] = '\r'; break;
                case 't':  input[output_idx++] = '\t'; break;
                case '\'': input[output_idx++] = '\''; break;
                case '\"': input[output_idx++] = '\"'; break;
                case '\\': input[output_idx++] = '\\'; break;
                case 'x':
                    // Handle \x12, etc
                    if (input_idx + 2 < input_len) {
                        const char x[3] = { input[input_idx + 1], input[input_idx + 2], 0 };
                        char *err_p = nullptr;
                        const long val = std::strtol(x, &err_p, 16);
                        if (err_p == x + 2) {
                            input_idx += 2;
                            input[output_idx++] = char(val);
                            break;
                        }
                    }
                    // fall through
                default:   input[output_idx++] = '\\';
                           input[output_idx++] = input[input_idx]; break;
            }
        } else {
            input[output_idx++] = input[input_idx];
        }
    }

    input.resize(output_idx);
}

bool gpt_params_parse(int argc, char ** argv, gpt_params & params) {
    bool result = true;
    try {
        if (!gpt_params_parse_ex(argc, argv, params)) {
            gpt_print_usage(argc, argv, gpt_params());
            exit(0);
        }
    }
    catch (const std::invalid_argument & ex) {
        fprintf(stderr, "%s\n", ex.what());
        gpt_print_usage(argc, argv, gpt_params());
        exit(1);
    }
    return result;
}

bool gpt_params_parse_ex(int argc, char ** argv, gpt_params & params) {
    bool invalid_param = false;
    std::string arg;
    const std::string arg_prefix = "--";
    llama_sampling_params & sparams = params.sparams;

    for (int i = 1; i < argc; i++) {
        arg = argv[i];
        if (arg.compare(0, arg_prefix.size(), arg_prefix) == 0) {
            std::replace(arg.begin(), arg.end(), '_', '-');
        }

        if (arg == "-s" || arg == "--seed") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.seed = std::stoul(argv[i]);
        } else if (arg == "-t" || arg == "--threads") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_threads = std::stoi(argv[i]);
            if (params.n_threads <= 0) {
                params.n_threads = std::thread::hardware_concurrency();
            }
        } else if (arg == "-tb" || arg == "--threads-batch") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_threads_batch = std::stoi(argv[i]);
            if (params.n_threads_batch <= 0) {
                params.n_threads_batch = std::thread::hardware_concurrency();
            }
        } else if (arg == "-td" || arg == "--threads-draft") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_threads_draft = std::stoi(argv[i]);
            if (params.n_threads_draft <= 0) {
                params.n_threads_draft = std::thread::hardware_concurrency();
            }
        } else if (arg == "-tbd" || arg == "--threads-batch-draft") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_threads_batch_draft = std::stoi(argv[i]);
            if (params.n_threads_batch_draft <= 0) {
                params.n_threads_batch_draft = std::thread::hardware_concurrency();
            }
        } else if (arg == "-p" || arg == "--prompt") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.prompt = argv[i];
        } else if (arg == "-e" || arg == "--escape") {
            params.escape = true;
        } else if (arg == "--prompt-cache") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.path_prompt_cache = argv[i];
        } else if (arg == "--prompt-cache-all") {
            params.prompt_cache_all = true;
        } else if (arg == "--prompt-cache-ro") {
            params.prompt_cache_ro = true;
        } else if (arg == "-bf" || arg == "--binary-file") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::ifstream file(argv[i], std::ios::binary);
            if (!file) {
                fprintf(stderr, "error: failed to open file '%s'\n", argv[i]);
                invalid_param = true;
                break;
            }
            // store the external file name in params
            params.prompt_file = argv[i];
            std::ostringstream ss;
            ss << file.rdbuf();
            params.prompt = ss.str();
            fprintf(stderr, "Read %zu bytes from binary file %s\n", params.prompt.size(), argv[i]);
        } else if (arg == "-f" || arg == "--file") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::ifstream file(argv[i]);
            if (!file) {
                fprintf(stderr, "error: failed to open file '%s'\n", argv[i]);
                invalid_param = true;
                break;
            }
            // store the external file name in params
            params.prompt_file = argv[i];
            std::copy(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>(), back_inserter(params.prompt));
            if (!params.prompt.empty() && params.prompt.back() == '\n') {
                params.prompt.pop_back();
            }
        } else if (arg == "-n" || arg == "--n-predict") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_predict = std::stoi(argv[i]);
        } else if (arg == "--top-k") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.top_k = std::stoi(argv[i]);
        } else if (arg == "-c" || arg == "--ctx-size") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_ctx = std::stoi(argv[i]);
        } else if (arg == "--grp-attn-n" || arg == "-gan") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }

            params.grp_attn_n = std::stoi(argv[i]);
        } else if (arg == "--grp-attn-w" || arg == "-gaw") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }

            params.grp_attn_w = std::stoi(argv[i]);
        } else if (arg == "--rope-freq-base") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.rope_freq_base = std::stof(argv[i]);
        } else if (arg == "--rope-freq-scale") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.rope_freq_scale = std::stof(argv[i]);
        } else if (arg == "--rope-scaling") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::string value(argv[i]);
            /**/ if (value == "none")   { params.rope_scaling_type = LLAMA_ROPE_SCALING_NONE; }
            else if (value == "linear") { params.rope_scaling_type = LLAMA_ROPE_SCALING_LINEAR; }
            else if (value == "yarn")   { params.rope_scaling_type = LLAMA_ROPE_SCALING_YARN; }
            else { invalid_param = true; break; }
        } else if (arg == "--rope-scale") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.rope_freq_scale = 1.0f/std::stof(argv[i]);
        } else if (arg == "--yarn-orig-ctx") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.yarn_orig_ctx = std::stoi(argv[i]);
        } else if (arg == "--yarn-ext-factor") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.yarn_ext_factor = std::stof(argv[i]);
        } else if (arg == "--yarn-attn-factor") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.yarn_attn_factor = std::stof(argv[i]);
        } else if (arg == "--yarn-beta-fast") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.yarn_beta_fast = std::stof(argv[i]);
        } else if (arg == "--yarn-beta-slow") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.yarn_beta_slow = std::stof(argv[i]);
        } else if (arg == "--samplers") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.samplers_sequence = parse_samplers_input(argv[i]);
        } else if (arg == "--sampling-seq") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.samplers_sequence = argv[i];
        } else if (arg == "--top-p") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.top_p = std::stof(argv[i]);
        } else if (arg == "--min-p") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.min_p = std::stof(argv[i]);
        } else if (arg == "--temp") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.temp = std::stof(argv[i]);
            sparams.temp = std::max(sparams.temp, 0.0f);
        } else if (arg == "--tfs") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.tfs_z = std::stof(argv[i]);
        } else if (arg == "--typical") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.typical_p = std::stof(argv[i]);
        } else if (arg == "--repeat-last-n") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.penalty_last_n = std::stoi(argv[i]);
            sparams.n_prev = std::max(sparams.n_prev, sparams.penalty_last_n);
        } else if (arg == "--repeat-penalty") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.penalty_repeat = std::stof(argv[i]);
        } else if (arg == "--frequency-penalty") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.penalty_freq = std::stof(argv[i]);
        } else if (arg == "--presence-penalty") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.penalty_present = std::stof(argv[i]);
        } else if (arg == "--dynatemp-range") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.dynatemp_range = std::stof(argv[i]);
        } else if (arg == "--dynatemp-exp") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.dynatemp_exponent = std::stof(argv[i]);
        } else if (arg == "--mirostat") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.mirostat = std::stoi(argv[i]);
        } else if (arg == "--mirostat-lr") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.mirostat_eta = std::stof(argv[i]);
        } else if (arg == "--mirostat-ent") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.mirostat_tau = std::stof(argv[i]);
        } else if (arg == "--cfg-negative-prompt") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.cfg_negative_prompt = argv[i];
        } else if (arg == "--cfg-negative-prompt-file") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::ifstream file(argv[i]);
            if (!file) {
                fprintf(stderr, "error: failed to open file '%s'\n", argv[i]);
                invalid_param = true;
                break;
            }
            std::copy(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>(), back_inserter(sparams.cfg_negative_prompt));
            if (!sparams.cfg_negative_prompt.empty() && sparams.cfg_negative_prompt.back() == '\n') {
                sparams.cfg_negative_prompt.pop_back();
            }
        } else if (arg == "--cfg-scale") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.cfg_scale = std::stof(argv[i]);
        } else if (arg == "-b" || arg == "--batch-size") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_batch = std::stoi(argv[i]);
        } else if (arg == "--keep") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_keep = std::stoi(argv[i]);
        } else if (arg == "--draft") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_draft = std::stoi(argv[i]);
        } else if (arg == "--chunks") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_chunks = std::stoi(argv[i]);
        } else if (arg == "-np" || arg == "--parallel") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_parallel = std::stoi(argv[i]);
        } else if (arg == "-ns" || arg == "--sequences") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_sequences = std::stoi(argv[i]);
        } else if (arg == "--p-accept" || arg == "-pa") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.p_accept = std::stof(argv[i]);
        } else if (arg == "--p-split" || arg == "-ps") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.p_split = std::stof(argv[i]);
        } else if (arg == "-m" || arg == "--model") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.model = argv[i];
        } else if (arg == "-md" || arg == "--model-draft") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.model_draft = argv[i];
        } else if (arg == "-a" || arg == "--alias") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.model_alias = argv[i];
        } else if (arg == "--lora") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.lora_adapter.emplace_back(argv[i], 1.0f);
            params.use_mmap = false;
        } else if (arg == "--lora-scaled") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            const char * lora_adapter = argv[i];
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.lora_adapter.emplace_back(lora_adapter, std::stof(argv[i]));
            params.use_mmap = false;
        } else if (arg == "--lora-base") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.lora_base = argv[i];
        } else if (arg == "--mmproj") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.mmproj = argv[i];
        } else if (arg == "--image") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.image = argv[i];
        } else if (arg == "-i" || arg == "--interactive") {
            params.interactive = true;
        } else if (arg == "--embedding") {
            params.embedding = true;
        } else if (arg == "--interactive-first") {
            params.interactive_first = true;
        } else if (arg == "-ins" || arg == "--instruct") {
            params.instruct = true;
        } else if (arg == "-cml" || arg == "--chatml") {
            params.chatml = true;
        } else if (arg == "--infill") {
            params.infill = true;
        } else if (arg == "-dkvc" || arg == "--dump-kv-cache") {
            params.dump_kv_cache = true;
        } else if (arg == "-nkvo" || arg == "--no-kv-offload") {
            params.no_kv_offload = true;
        } else if (arg == "-ctk" || arg == "--cache-type-k") {
            params.cache_type_k = argv[++i];
        } else if (arg == "-ctv" || arg == "--cache-type-v") {
            params.cache_type_v = argv[++i];
        } else if (arg == "--multiline-input") {
            params.multiline_input = true;
        } else if (arg == "--simple-io") {
            params.simple_io = true;
        } else if (arg == "-cb" || arg == "--cont-batching") {
            params.cont_batching = true;
        } else if (arg == "--color") {
            params.use_color = true;
        } else if (arg == "--mlock") {
            params.use_mlock = true;
        } else if (arg == "--gpu-layers" || arg == "-ngl" || arg == "--n-gpu-layers") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_gpu_layers = std::stoi(argv[i]);
            if (!llama_supports_gpu_offload()) {
                fprintf(stderr, "warning: not compiled with GPU offload support, --n-gpu-layers option will be ignored\n");
                fprintf(stderr, "warning: see main README.md for information on enabling GPU BLAS support\n");
            }
        } else if (arg == "--gpu-layers-draft" || arg == "-ngld" || arg == "--n-gpu-layers-draft") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_gpu_layers_draft = std::stoi(argv[i]);
            if (!llama_supports_gpu_offload()) {
                fprintf(stderr, "warning: not compiled with GPU offload support, --n-gpu-layers-draft option will be ignored\n");
                fprintf(stderr, "warning: see main README.md for information on enabling GPU BLAS support\n");
            }
        } else if (arg == "--main-gpu" || arg == "-mg") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.main_gpu = std::stoi(argv[i]);
#ifndef GGML_USE_CUBLAS_SYCL
            fprintf(stderr, "warning: llama.cpp was compiled without cuBLAS/SYCL. Setting the main GPU has no effect.\n");
#endif // GGML_USE_CUBLAS_SYCL
        } else if (arg == "--split-mode" || arg == "-sm") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::string arg_next = argv[i];
            if (arg_next == "none") {
                params.split_mode = LLAMA_SPLIT_NONE;
            } else if (arg_next == "layer") {
                params.split_mode = LLAMA_SPLIT_LAYER;
            } else if (arg_next == "row") {
                params.split_mode = LLAMA_SPLIT_ROW;
            } else {
                invalid_param = true;
                break;
            }
#ifndef GGML_USE_CUBLAS_SYCL
            fprintf(stderr, "warning: llama.cpp was compiled without cuBLAS/SYCL. Setting the split mode has no effect.\n");
#endif // GGML_USE_CUBLAS_SYCL

        } else if (arg == "--tensor-split" || arg == "-ts") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::string arg_next = argv[i];

            // split string by , and /
            const std::regex regex{R"([,/]+)"};
            std::sregex_token_iterator it{arg_next.begin(), arg_next.end(), regex, -1};
            std::vector<std::string> split_arg{it, {}};
            if (split_arg.size() >= llama_max_devices()) {
                invalid_param = true;
                break;
            }
            for (size_t i = 0; i < llama_max_devices(); ++i) {
                if (i < split_arg.size()) {
                    params.tensor_split[i] = std::stof(split_arg[i]);
                } else {
                    params.tensor_split[i] = 0.0f;
                }
            }
#ifndef GGML_USE_CUBLAS_SYCL_VULKAN
            fprintf(stderr, "warning: llama.cpp was compiled without cuBLAS/SYCL/Vulkan. Setting a tensor split has no effect.\n");
#endif // GGML_USE_CUBLAS_SYCL
        } else if (arg == "--no-mmap") {
            params.use_mmap = false;
        } else if (arg == "--numa") {
            params.numa = true;
        } else if (arg == "--verbose-prompt") {
            params.verbose_prompt = true;
        } else if (arg == "--no-display-prompt") {
            params.display_prompt = false;
        } else if (arg == "-r" || arg == "--reverse-prompt") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.antiprompt.emplace_back(argv[i]);
        } else if (arg == "-ld" || arg == "--logdir") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.logdir = argv[i];

            if (params.logdir.back() != DIRECTORY_SEPARATOR) {
                params.logdir += DIRECTORY_SEPARATOR;
            }
        } else if (arg == "--save-all-logits" || arg == "--kl-divergence-base") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.logits_file = argv[i];
        } else if (arg == "--perplexity" || arg == "--all-logits") {
            params.logits_all = true;
        } else if (arg == "--ppl-stride") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.ppl_stride = std::stoi(argv[i]);
        } else if (arg == "-ptc" || arg == "--print-token-count") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.n_print = std::stoi(argv[i]);
        } else if (arg == "--ppl-output-type") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.ppl_output_type = std::stoi(argv[i]);
        } else if (arg == "--hellaswag") {
            params.hellaswag = true;
        } else if (arg == "--hellaswag-tasks") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.hellaswag_tasks = std::stoi(argv[i]);
        } else if (arg == "--winogrande") {
            params.winogrande = true;
        } else if (arg == "--winogrande-tasks") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.winogrande_tasks = std::stoi(argv[i]);
        } else if (arg == "--multiple-choice") {
            params.multiple_choice = true;
        } else if (arg == "--multiple-choice-tasks") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.multiple_choice_tasks = std::stoi(argv[i]);
        } else if (arg == "--kl-divergence") {
            params.kl_divergence = true;
        } else if (arg == "--ignore-eos") {
            params.ignore_eos = true;
        } else if (arg == "--no-penalize-nl") {
            sparams.penalize_nl = false;
        } else if (arg == "-l" || arg == "--logit-bias") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::stringstream ss(argv[i]);
            llama_token key;
            char sign;
            std::string value_str;
            try {
                if (ss >> key && ss >> sign && std::getline(ss, value_str) && (sign == '+' || sign == '-')) {
                    sparams.logit_bias[key] = std::stof(value_str) * ((sign == '-') ? -1.0f : 1.0f);
                } else {
                    throw std::exception();
                }
            } catch (const std::exception&) {
                invalid_param = true;
                break;
            }
        } else if (arg == "-h" || arg == "--help") {
            return false;

        } else if (arg == "--version") {
            fprintf(stderr, "version: %d (%s)\n", LLAMA_BUILD_NUMBER, LLAMA_COMMIT);
            fprintf(stderr, "built with %s for %s\n", LLAMA_COMPILER, LLAMA_BUILD_TARGET);
            exit(0);
        } else if (arg == "--random-prompt") {
            params.random_prompt = true;
        } else if (arg == "--in-prefix-bos") {
            params.input_prefix_bos = true;
        } else if (arg == "--in-prefix") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.input_prefix = argv[i];
        } else if (arg == "--in-suffix") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            params.input_suffix = argv[i];
        } else if (arg == "--grammar") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            sparams.grammar = argv[i];
        } else if (arg == "--grammar-file") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            std::ifstream file(argv[i]);
            if (!file) {
                fprintf(stderr, "error: failed to open file '%s'\n", argv[i]);
                invalid_param = true;
                break;
            }
            std::copy(
                std::istreambuf_iterator<char>(file),
                std::istreambuf_iterator<char>(),
                std::back_inserter(sparams.grammar)
            );
        } else if (arg == "--override-kv") {
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            char * sep = strchr(argv[i], '=');
            if (sep == nullptr || sep - argv[i] >= 128) {
                fprintf(stderr, "error: Malformed KV override: %s\n", argv[i]);
                invalid_param = true;
                break;
            }
            struct llama_model_kv_override kvo;
            std::strncpy(kvo.key, argv[i], sep - argv[i]);
            kvo.key[sep - argv[i]] = 0;
            sep++;
            if (strncmp(sep, "int:", 4) == 0) {
                sep += 4;
                kvo.tag = LLAMA_KV_OVERRIDE_INT;
                kvo.int_value = std::atol(sep);
            } else if (strncmp(sep, "float:", 6) == 0) {
                sep += 6;
                kvo.tag = LLAMA_KV_OVERRIDE_FLOAT;
                kvo.float_value = std::atof(sep);
            } else if (strncmp(sep, "bool:", 5) == 0) {
                sep += 5;
                kvo.tag = LLAMA_KV_OVERRIDE_BOOL;
                if (std::strcmp(sep, "true") == 0) {
                    kvo.bool_value = true;
                } else if (std::strcmp(sep, "false") == 0) {
                    kvo.bool_value = false;
                } else {
                    fprintf(stderr, "error: Invalid boolean value for KV override: %s\n", argv[i]);
                    invalid_param = true;
                    break;
                }
            } else {
                fprintf(stderr, "error: Invalid type for KV override: %s\n", argv[i]);
                invalid_param = true;
                break;
            }
            params.kv_overrides.push_back(kvo);
#ifndef LOG_DISABLE_LOGS
        // Parse args for logging parameters
        } else if ( log_param_single_parse( argv[i] ) ) {
            // Do nothing, log_param_single_parse automatically does it's thing
            //  and returns if a match was found and parsed.
        } else if ( log_param_pair_parse( /*check_but_dont_parse*/ true, argv[i] ) ) {
            // We have a matching known parameter requiring an argument,
            //  now we need to check if there is anything after this argv
            //  and flag invalid_param or parse it.
            if (++i >= argc) {
                invalid_param = true;
                break;
            }
            if( !log_param_pair_parse( /*check_but_dont_parse*/ false, argv[i-1], argv[i]) ) {
                invalid_param = true;
                break;
            }
        // End of Parse args for logging parameters
#endif // LOG_DISABLE_LOGS
        } else {
            throw std::invalid_argument("error: unknown argument: " + arg);
        }
    }
    if (invalid_param) {
        throw std::invalid_argument("error: invalid parameter for argument: " + arg);
    }
    if (params.prompt_cache_all &&
            (params.interactive || params.interactive_first ||
             params.instruct)) {

        throw std::invalid_argument("error: --prompt-cache-all not supported in interactive mode yet\n");
    }

    if (params.escape) {
        process_escapes(params.prompt);
        process_escapes(params.input_prefix);
        process_escapes(params.input_suffix);
        process_escapes(sparams.cfg_negative_prompt);
        for (auto & antiprompt : params.antiprompt) {
            process_escapes(antiprompt);
        }
    }

    if (!params.kv_overrides.empty()) {
        params.kv_overrides.emplace_back();
        params.kv_overrides.back().key[0] = 0;
    }

    return true;
}

void gpt_print_usage(int /*argc*/, char ** argv, const gpt_params & params) {
    const llama_sampling_params & sparams = params.sparams;

    printf("\n");
    printf("usage: %s [options]\n", argv[0]);
    printf("\n");
    printf("options:\n");
    printf("  -h, --help            show this help message and exit\n");
    printf("  --version             show version and build info\n");
    printf("  -i, --interactive     run in interactive mode\n");
    printf("  --interactive-first   run in interactive mode and wait for input right away\n");
    printf("  -ins, --instruct      run in instruction mode (use with Alpaca models)\n");
    printf("  -cml, --chatml        run in chatml mode (use with ChatML-compatible models)\n");
    printf("  --multiline-input     allows you to write or paste multiple lines without ending each in '\\'\n");
    printf("  -r PROMPT, --reverse-prompt PROMPT\n");
    printf("                        halt generation at PROMPT, return control in interactive mode\n");
    printf("                        (can be specified more than once for multiple prompts).\n");
    printf("  --color               colorise output to distinguish prompt and user input from generations\n");
    printf("  -s SEED, --seed SEED  RNG seed (default: -1, use random seed for < 0)\n");
    printf("  -t N, --threads N     number of threads to use during generation (default: %d)\n", params.n_threads);
    printf("  -tb N, --threads-batch N\n");
    printf("                        number of threads to use during batch and prompt processing (default: same as --threads)\n");
    printf("  -td N, --threads-draft N");
    printf("                        number of threads to use during generation (default: same as --threads)");
    printf("  -tbd N, --threads-batch-draft N\n");
    printf("                        number of threads to use during batch and prompt processing (default: same as --threads-draft)\n");
    printf("  -p PROMPT, --prompt PROMPT\n");
    printf("                        prompt to start generation with (default: empty)\n");
    printf("  -e, --escape          process prompt escapes sequences (\\n, \\r, \\t, \\', \\\", \\\\)\n");
    printf("  --prompt-cache FNAME  file to cache prompt state for faster startup (default: none)\n");
    printf("  --prompt-cache-all    if specified, saves user input and generations to cache as well.\n");
    printf("                        not supported with --interactive or other interactive options\n");
    printf("  --prompt-cache-ro     if specified, uses the prompt cache but does not update it.\n");
    printf("  --random-prompt       start with a randomized prompt.\n");
    printf("  --in-prefix-bos       prefix BOS to user inputs, preceding the `--in-prefix` string\n");
    printf("  --in-prefix STRING    string to prefix user inputs with (default: empty)\n");
    printf("  --in-suffix STRING    string to suffix after user inputs with (default: empty)\n");
    printf("  -f FNAME, --file FNAME\n");
    printf("                        prompt file to start generation.\n");
    printf("  -bf FNAME, --binary-file FNAME\n");
    printf("                        binary file containing multiple choice tasks.\n");
    printf("  -n N, --n-predict N   number of tokens to predict (default: %d, -1 = infinity, -2 = until context filled)\n", params.n_predict);
    printf("  -c N, --ctx-size N    size of the prompt context (default: %d, 0 = loaded from model)\n", params.n_ctx);
    printf("  -b N, --batch-size N  batch size for prompt processing (default: %d)\n", params.n_batch);
    printf("  --samplers            samplers that will be used for generation in the order, separated by \';\', for example: \"top_k;tfs;typical;top_p;min_p;temp\"\n");
    printf("  --sampling-seq        simplified sequence for samplers that will be used (default: %s)\n", sparams.samplers_sequence.c_str());
    printf("  --top-k N             top-k sampling (default: %d, 0 = disabled)\n", sparams.top_k);
    printf("  --top-p N             top-p sampling (default: %.1f, 1.0 = disabled)\n", (double)sparams.top_p);
    printf("  --min-p N             min-p sampling (default: %.1f, 0.0 = disabled)\n", (double)sparams.min_p);
    printf("  --tfs N               tail free sampling, parameter z (default: %.1f, 1.0 = disabled)\n", (double)sparams.tfs_z);
    printf("  --typical N           locally typical sampling, parameter p (default: %.1f, 1.0 = disabled)\n", (double)sparams.typical_p);
    printf("  --repeat-last-n N     last n tokens to consider for penalize (default: %d, 0 = disabled, -1 = ctx_size)\n", sparams.penalty_last_n);
    printf("  --repeat-penalty N    penalize repeat sequence of tokens (default: %.1f, 1.0 = disabled)\n", (double)sparams.penalty_repeat);
    printf("  --presence-penalty N  repeat alpha presence penalty (default: %.1f, 0.0 = disabled)\n", (double)sparams.penalty_present);
    printf("  --frequency-penalty N repeat alpha frequency penalty (default: %.1f, 0.0 = disabled)\n", (double)sparams.penalty_freq);
    printf("  --dynatemp-range N    dynamic temperature range (default: %.1f, 0.0 = disabled)\n", (double)sparams.dynatemp_range);
    printf("  --dynatemp-exp N      dynamic temperature exponent (default: %.1f)\n", (double)sparams.dynatemp_exponent);
    printf("  --mirostat N          use Mirostat sampling.\n");
    printf("                        Top K, Nucleus, Tail Free and Locally Typical samplers are ignored if used.\n");
    printf("                        (default: %d, 0 = disabled, 1 = Mirostat, 2 = Mirostat 2.0)\n", sparams.mirostat);
    printf("  --mirostat-lr N       Mirostat learning rate, parameter eta (default: %.1f)\n", (double)sparams.mirostat_eta);
    printf("  --mirostat-ent N      Mirostat target entropy, parameter tau (default: %.1f)\n", (double)sparams.mirostat_tau);
    printf("  -l TOKEN_ID(+/-)BIAS, --logit-bias TOKEN_ID(+/-)BIAS\n");
    printf("                        modifies the likelihood of token appearing in the completion,\n");
    printf("                        i.e. `--logit-bias 15043+1` to increase likelihood of token ' Hello',\n");
    printf("                        or `--logit-bias 15043-1` to decrease likelihood of token ' Hello'\n");
    printf("  --grammar GRAMMAR     BNF-like grammar to constrain generations (see samples in grammars/ dir)\n");
    printf("  --grammar-file FNAME  file to read grammar from\n");
    printf("  --cfg-negative-prompt PROMPT\n");
    printf("                        negative prompt to use for guidance. (default: empty)\n");
    printf("  --cfg-negative-prompt-file FNAME\n");
    printf("                        negative prompt file to use for guidance. (default: empty)\n");
    printf("  --cfg-scale N         strength of guidance (default: %f, 1.0 = disable)\n", sparams.cfg_scale);
    printf("  --rope-scaling {none,linear,yarn}\n");
    printf("                        RoPE frequency scaling method, defaults to linear unless specified by the model\n");
    printf("  --rope-scale N        RoPE context scaling factor, expands context by a factor of N\n");
    printf("  --rope-freq-base N    RoPE base frequency, used by NTK-aware scaling (default: loaded from model)\n");
    printf("  --rope-freq-scale N   RoPE frequency scaling factor, expands context by a factor of 1/N\n");
    printf("  --yarn-orig-ctx N     YaRN: original context size of model (default: 0 = model training context size)\n");
    printf("  --yarn-ext-factor N   YaRN: extrapolation mix factor (default: 1.0, 0.0 = full interpolation)\n");
    printf("  --yarn-attn-factor N  YaRN: scale sqrt(t) or attention magnitude (default: 1.0)\n");
    printf("  --yarn-beta-slow N    YaRN: high correction dim or alpha (default: %.1f)\n", params.yarn_beta_slow);
    printf("  --yarn-beta-fast N    YaRN: low correction dim or beta (default: %.1f)\n", params.yarn_beta_fast);
    printf("  --ignore-eos          ignore end of stream token and continue generating (implies --logit-bias 2-inf)\n");
    printf("  --no-penalize-nl      do not penalize newline token\n");
    printf("  --temp N              temperature (default: %.1f)\n", (double)sparams.temp);
    printf("  --logits-all          return logits for all tokens in the batch (default: disabled)\n");
    printf("  --hellaswag           compute HellaSwag score over random tasks from datafile supplied with -f\n");
    printf("  --hellaswag-tasks N   number of tasks to use when computing the HellaSwag score (default: %zu)\n", params.hellaswag_tasks);
    printf("  --winogrande          compute Winogrande score over random tasks from datafile supplied with -f\n");
    printf("  --winogrande-tasks N  number of tasks to use when computing the Winogrande score (default: %zu)\n", params.winogrande_tasks);
    printf("  --multiple-choice     compute multiple choice score over random tasks from datafile supplied with -f\n");
    printf("  --multiple-choice-tasks N number of tasks to use when computing the multiple choice score (default: %zu)\n", params.winogrande_tasks);
    printf("  --kl-divergence       computes KL-divergence to logits provided via --kl-divergence-base");
    printf("  --keep N              number of tokens to keep from the initial prompt (default: %d, -1 = all)\n", params.n_keep);
    printf("  --draft N             number of tokens to draft for speculative decoding (default: %d)\n", params.n_draft);
    printf("  --chunks N            max number of chunks to process (default: %d, -1 = all)\n", params.n_chunks);
    printf("  -np N, --parallel N   number of parallel sequences to decode (default: %d)\n", params.n_parallel);
    printf("  -ns N, --sequences N  number of sequences to decode (default: %d)\n", params.n_sequences);
    printf("  -pa N, --p-accept N   speculative decoding accept probability (default: %.1f)\n", (double)params.p_accept);
    printf("  -ps N, --p-split N    speculative decoding split probability (default: %.1f)\n", (double)params.p_split);
    printf("  -cb, --cont-batching  enable continuous batching (a.k.a dynamic batching) (default: disabled)\n");
    printf("  --mmproj MMPROJ_FILE  path to a multimodal projector file for LLaVA. see examples/llava/README.md\n");
    printf("  --image IMAGE_FILE    path to an image file. use with multimodal models\n");
    if (llama_supports_mlock()) {
        printf("  --mlock               force system to keep model in RAM rather than swapping or compressing\n");
    }
    if (llama_supports_mmap()) {
        printf("  --no-mmap             do not memory-map model (slower load but may reduce pageouts if not using mlock)\n");
    }
    printf("  --numa                attempt optimizations that help on some NUMA systems\n");
    printf("                        if run without this previously, it is recommended to drop the system page cache before using this\n");
    printf("                        see https://github.com/ggerganov/llama.cpp/issues/1437\n");
    if (llama_supports_gpu_offload()) {
        printf("  -ngl N, --n-gpu-layers N\n");
        printf("                        number of layers to store in VRAM\n");
        printf("  -ngld N, --n-gpu-layers-draft N\n");
        printf("                        number of layers to store in VRAM for the draft model\n");
        printf("  -sm SPLIT_MODE, --split-mode SPLIT_MODE\n");
        printf("                        how to split the model across multiple GPUs, one of:\n");
        printf("                          - none: use one GPU only\n");
        printf("                          - layer (default): split layers and KV across GPUs\n");
        printf("                          - row: split rows across GPUs\n");
        printf("  -ts SPLIT, --tensor-split SPLIT\n");
        printf("                        fraction of the model to offload to each GPU, comma-separated list of proportions, e.g. 3,1\n");
        printf("  -mg i, --main-gpu i   the GPU to use for the model (with split-mode = none),\n");
        printf("                        or for intermediate results and KV (with split-mode = row) (default: %d)\n", params.main_gpu);
    }
    printf("  --verbose-prompt      print a verbose prompt before generation (default: %s)\n", params.verbose_prompt ? "true" : "false");
    printf("  --no-display-prompt   don't print prompt at generation (default: %s)\n", !params.display_prompt ? "true" : "false");
    printf("  -gan N, --grp-attn-n N\n");
    printf("                        group-attention factor (default: %d)\n", params.grp_attn_n);
    printf("  -gaw N, --grp-attn-w N\n");
    printf("                        group-attention width (default: %.1f)\n", (double)params.grp_attn_w);
    printf("  -dkvc, --dump-kv-cache\n");
    printf("                        verbose print of the KV cache\n");
    printf("  -nkvo, --no-kv-offload\n");
    printf("                        disable KV offload\n");
    printf("  -ctk TYPE, --cache-type-k TYPE\n");
    printf("                        KV cache data type for K (default: %s)\n", params.cache_type_k.c_str());
    printf("  -ctv TYPE, --cache-type-v TYPE\n");
    printf("                        KV cache data type for V (default: %s)\n", params.cache_type_v.c_str());
    printf("  --simple-io           use basic IO for better compatibility in subprocesses and limited consoles\n");
    printf("  --lora FNAME          apply LoRA adapter (implies --no-mmap)\n");
    printf("  --lora-scaled FNAME S apply LoRA adapter with user defined scaling S (implies --no-mmap)\n");
    printf("  --lora-base FNAME     optional model to use as a base for the layers modified by the LoRA adapter\n");
    printf("  -m FNAME, --model FNAME\n");
    printf("                        model path (default: %s)\n", params.model.c_str());
    printf("  -md FNAME, --model-draft FNAME\n");
    printf("                        draft model for speculative decoding\n");
    printf("  -ld LOGDIR, --logdir LOGDIR\n");
    printf("                        path under which to save YAML logs (no logging if unset)\n");
    printf("  --override-kv KEY=TYPE:VALUE\n");
    printf("                        advanced option to override model metadata by key. may be specified multiple times.\n");
    printf("                        types: int, float, bool. example: --override-kv tokenizer.ggml.add_bos_token=bool:false\n");
    printf("  -ptc N, --print-token-count N\n");
    printf("                        print token count every N tokens (default: %d)\n", params.n_print);
    printf("\n");
#ifndef LOG_DISABLE_LOGS
    log_print_usage();
#endif // LOG_DISABLE_LOGS
}

std::string get_system_info(const gpt_params & params) {
    std::ostringstream os;

    os << "system_info: n_threads = " << params.n_threads;
    if (params.n_threads_batch != -1) {
        os << " (n_threads_batch = " << params.n_threads_batch << ")";
    }
    os << " / " << std::thread::hardware_concurrency() << " | " << llama_print_system_info();

    return os.str();
}

std::string gpt_random_prompt(std::mt19937 & rng) {
    const int r = rng() % 10;
    switch (r) {
        case 0: return "So";
        case 1: return "Once upon a time";
        case 2: return "When";
        case 3: return "The";
        case 4: return "After";
        case 5: return "If";
        case 6: return "import";
        case 7: return "He";
        case 8: return "She";
        case 9: return "They";
    }

    GGML_UNREACHABLE();
}

//
// String parsing
//

std::string parse_samplers_input(std::string input) {
    std::string output = "";
    // since samplers names are written multiple ways
    // make it ready for both system names and input names
    std::unordered_map<std::string, char> samplers_symbols {
        {"top_k",      'k'},
        {"top-k",      'k'},
        {"top_p",      'p'},
        {"top-p",      'p'},
        {"nucleus",    'p'},
        {"typical_p",  'y'},
        {"typical-p",  'y'},
        {"typical",    'y'},
        {"min_p",      'm'},
        {"min-p",      'm'},
        {"tfs_z",      'f'},
        {"tfs-z",      'f'},
        {"tfs",        'f'},
        {"temp",       't'},
        {"temperature",'t'}
    };
    // expected format example: "temp;top_k;tfs_z;typical_p;top_p;min_p"
    size_t separator = input.find(';');
    while (separator != input.npos) {
        std::string name = input.substr(0,separator);
        input = input.substr(separator+1);
        separator = input.find(';');

        if (samplers_symbols.find(name) != samplers_symbols.end()) {
            output += samplers_symbols[name];
        }
    }
    if (samplers_symbols.find(input) != samplers_symbols.end()) {
        output += samplers_symbols[input];
    }
    return output;
}

//
// Model utils
//

struct llama_model_params llama_model_params_from_gpt_params(const gpt_params & params) {
    auto mparams = llama_model_default_params();

    if (params.n_gpu_layers != -1) {
        mparams.n_gpu_layers = params.n_gpu_layers;
    }
    mparams.main_gpu        = params.main_gpu;
    mparams.split_mode      = params.split_mode;
    mparams.tensor_split    = params.tensor_split;
    mparams.use_mmap        = params.use_mmap;
    mparams.use_mlock       = params.use_mlock;
    if (params.kv_overrides.empty()) {
        mparams.kv_overrides = NULL;
    } else {
        GGML_ASSERT(params.kv_overrides.back().key[0] == 0 && "KV overrides not terminated with empty key");
        mparams.kv_overrides = params.kv_overrides.data();
    }

    return mparams;
}

static ggml_type kv_cache_type_from_str(const std::string & s) {
    if (s == "f32") {
        return GGML_TYPE_F32;
    }
    if (s == "f16") {
        return GGML_TYPE_F16;
    }
    if (s == "q8_0") {
        return GGML_TYPE_Q8_0;
    }
    if (s == "q4_0") {
        return GGML_TYPE_Q4_0;
    }
    if (s == "q4_1") {
        return GGML_TYPE_Q4_1;
    }
    if (s == "q5_0") {
        return GGML_TYPE_Q5_0;
    }
    if (s == "q5_1") {
        return GGML_TYPE_Q5_1;
    }

    throw std::runtime_error("Invalid cache type: " + s);
}

struct llama_context_params llama_context_params_from_gpt_params(const gpt_params & params) {
    auto cparams = llama_context_default_params();

    cparams.n_ctx             = params.n_ctx;
    cparams.n_batch           = params.n_batch;
    cparams.n_threads         = params.n_threads;
    cparams.n_threads_batch   = params.n_threads_batch == -1 ? params.n_threads : params.n_threads_batch;
    cparams.mul_mat_q         = params.mul_mat_q;
    cparams.seed              = params.seed;
    cparams.logits_all        = params.logits_all;
    cparams.embedding         = params.embedding;
    cparams.rope_scaling_type = params.rope_scaling_type;
    cparams.rope_freq_base    = params.rope_freq_base;
    cparams.rope_freq_scale   = params.rope_freq_scale;
    cparams.yarn_ext_factor   = params.yarn_ext_factor;
    cparams.yarn_attn_factor  = params.yarn_attn_factor;
    cparams.yarn_beta_fast    = params.yarn_beta_fast;
    cparams.yarn_beta_slow    = params.yarn_beta_slow;
    cparams.yarn_orig_ctx     = params.yarn_orig_ctx;
    cparams.offload_kqv       = !params.no_kv_offload;

    cparams.type_k = kv_cache_type_from_str(params.cache_type_k);
    cparams.type_v = kv_cache_type_from_str(params.cache_type_v);

    return cparams;
}

void llama_batch_clear(struct llama_batch & batch) {
    batch.n_tokens = 0;
}

void llama_batch_add(
                 struct llama_batch & batch,
                        llama_token   id,
                          llama_pos   pos,
    const std::vector<llama_seq_id> & seq_ids,
                               bool   logits) {
    batch.token   [batch.n_tokens] = id;
    batch.pos     [batch.n_tokens] = pos;
    batch.n_seq_id[batch.n_tokens] = seq_ids.size();
    for (size_t i = 0; i < seq_ids.size(); ++i) {
        batch.seq_id[batch.n_tokens][i] = seq_ids[i];
    }
    batch.logits  [batch.n_tokens] = logits;

    batch.n_tokens++;
}

std::tuple<struct llama_model *, struct llama_context *> llama_init_from_gpt_params(gpt_params & params) {
    auto mparams = llama_model_params_from_gpt_params(params);

    llama_model * model  = llama_load_model_from_file(params.model.c_str(), mparams);
    if (model == NULL) {
        fprintf(stderr, "%s: error: failed to load model '%s'\n", __func__, params.model.c_str());
        return std::make_tuple(nullptr, nullptr);
    }

    auto cparams = llama_context_params_from_gpt_params(params);

    llama_context * lctx = llama_new_context_with_model(model, cparams);
    if (lctx == NULL) {
        fprintf(stderr, "%s: error: failed to create context with model '%s'\n", __func__, params.model.c_str());
        llama_free_model(model);
        return std::make_tuple(nullptr, nullptr);
    }

    for (unsigned int i = 0; i < params.lora_adapter.size(); ++i) {
        const std::string& lora_adapter = std::get<0>(params.lora_adapter[i]);
        float lora_scale = std::get<1>(params.lora_adapter[i]);
        int err = llama_model_apply_lora_from_file(model,
                                             lora_adapter.c_str(),
                                             lora_scale,
                                             ((i > 0) || params.lora_base.empty())
                                                ? NULL
                                                : params.lora_base.c_str(),
                                             params.n_threads);
        if (err != 0) {
            fprintf(stderr, "%s: error: failed to apply lora adapter\n", __func__);
            llama_free(lctx);
            llama_free_model(model);
            return std::make_tuple(nullptr, nullptr);
        }
    }

    if (params.ignore_eos) {
        params.sparams.logit_bias[llama_token_eos(model)] = -INFINITY;
    }

    {
        LOG("warming up the model with an empty run\n");

        std::vector<llama_token> tmp = { llama_token_bos(model), llama_token_eos(model), };
        llama_decode(lctx, llama_batch_get_one(tmp.data(), std::min(tmp.size(), (size_t) params.n_batch), 0, 0));
        llama_kv_cache_clear(lctx);
        llama_reset_timings(lctx);
    }

    return std::make_tuple(model, lctx);
}

//
// Vocab utils
//

std::vector<llama_token> llama_tokenize(
  const struct llama_context * ctx,
           const std::string & text,
                        bool   add_bos,
                        bool   special) {
    return llama_tokenize(llama_get_model(ctx), text, add_bos, special);
}

std::vector<llama_token> llama_tokenize(
    const struct llama_model * model,
           const std::string & text,
                        bool   add_bos,
                        bool   special) {
    // upper limit for the number of tokens
    int n_tokens = text.length() + add_bos;
    std::vector<llama_token> result(n_tokens);
    n_tokens = llama_tokenize(model, text.data(), text.length(), result.data(), result.size(), add_bos, special);
    if (n_tokens < 0) {
        result.resize(-n_tokens);
        int check = llama_tokenize(model, text.data(), text.length(), result.data(), result.size(), add_bos, special);
        GGML_ASSERT(check == -n_tokens);
    } else {
        result.resize(n_tokens);
    }
    return result;
}

std::string llama_token_to_piece(const struct llama_context * ctx, llama_token token) {
    std::vector<char> result(8, 0);
    const int n_tokens = llama_token_to_piece(llama_get_model(ctx), token, result.data(), result.size());
    if (n_tokens < 0) {
        result.resize(-n_tokens);
        int check = llama_token_to_piece(llama_get_model(ctx), token, result.data(), result.size());
        GGML_ASSERT(check == -n_tokens);
    } else {
        result.resize(n_tokens);
    }

    return std::string(result.data(), result.size());
}

std::string llama_detokenize_spm(llama_context * ctx, const std::vector<llama_token> & tokens) {
    const llama_token bos_id = llama_token_bos(llama_get_model(ctx));

    std::string piece;
    std::string result;

    for (size_t i = 0; i < tokens.size(); ++i) {
        piece = llama_token_to_piece(ctx, tokens[i]);

        // remove the leading space of the first non-BOS token
        if (((tokens[0] == bos_id && i == 1) || (tokens[0] != bos_id && i == 0)) && piece[0] == ' ') {
            piece = piece.substr(1);
        }

        result += piece;
    }

    return result;
}

std::string llama_detokenize_bpe(llama_context * ctx, const std::vector<llama_token> & tokens) {
    std::string piece;
    std::string result;

    for (size_t i = 0; i < tokens.size(); ++i) {
        piece = llama_token_to_piece(ctx, tokens[i]);

        result += piece;
    }

    // NOTE: the original tokenizer decodes bytes after collecting the pieces.
    return result;
}

bool llama_should_add_bos_token(const llama_model * model) {
    const int add_bos = llama_add_bos_token(model);

    return add_bos != -1 ? bool(add_bos) : (llama_vocab_type(model) == LLAMA_VOCAB_TYPE_SPM);
}

//
// YAML utils
//

// returns true if successful, false otherwise
bool create_directory_with_parents(const std::string & path) {
#ifdef _WIN32
    std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
    std::wstring wpath = converter.from_bytes(path);

    // if the path already exists, check whether it's a directory
    const DWORD attributes = GetFileAttributesW(wpath.c_str());
    if ((attributes != INVALID_FILE_ATTRIBUTES) && (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
        return true;
    }

    size_t pos_slash = 0;

    // process path from front to back, procedurally creating directories
    while ((pos_slash = path.find('\\', pos_slash)) != std::string::npos) {
        const std::wstring subpath = wpath.substr(0, pos_slash);
        const wchar_t * test = subpath.c_str();

        const bool success = CreateDirectoryW(test, NULL);
        if (!success) {
            const DWORD error = GetLastError();

            // if the path already exists, ensure that it's a directory
            if (error == ERROR_ALREADY_EXISTS) {
                const DWORD attributes = GetFileAttributesW(subpath.c_str());
                if (attributes == INVALID_FILE_ATTRIBUTES || !(attributes & FILE_ATTRIBUTE_DIRECTORY)) {
                    return false;
                }
            } else {
                return false;
            }
        }

        pos_slash += 1;
    }

    return true;
#else
    // if the path already exists, check whether it's a directory
    struct stat info;
    if (stat(path.c_str(), &info) == 0) {
        return S_ISDIR(info.st_mode);
    }

    size_t pos_slash = 1; // skip leading slashes for directory creation

    // process path from front to back, procedurally creating directories
    while ((pos_slash = path.find('/', pos_slash)) != std::string::npos) {
        const std::string subpath = path.substr(0, pos_slash);
        struct stat info;

        // if the path already exists, ensure that it's a directory
        if (stat(subpath.c_str(), &info) == 0) {
            if (!S_ISDIR(info.st_mode)) {
                return false;
            }
        } else {
            // create parent directories
            const int ret = mkdir(subpath.c_str(), 0755);
            if (ret != 0) {
                return false;
            }
        }

        pos_slash += 1;
    }

    return true;
#endif // _WIN32
}

void dump_vector_float_yaml(FILE * stream, const char * prop_name, const std::vector<float> & data) {
    if (data.empty()) {
        fprintf(stream, "%s:\n", prop_name);
        return;
    }

    fprintf(stream, "%s: [", prop_name);
    for (size_t i = 0; i < data.size() - 1; ++i) {
        fprintf(stream, "%e, ", data[i]);
    }
    fprintf(stream, "%e]\n", data.back());
}

void dump_vector_int_yaml(FILE * stream, const char * prop_name, const std::vector<int> & data) {
    if (data.empty()) {
        fprintf(stream, "%s:\n", prop_name);
        return;
    }

    fprintf(stream, "%s: [", prop_name);
    for (size_t i = 0; i < data.size() - 1; ++i) {
        fprintf(stream, "%d, ", data[i]);
    }
    fprintf(stream, "%d]\n", data.back());
}

void dump_string_yaml_multiline(FILE * stream, const char * prop_name, const char * data) {
    std::string data_str(data == NULL ? "" : data);

    if (data_str.empty()) {
        fprintf(stream, "%s:\n", prop_name);
        return;
    }

    size_t pos_start = 0;
    size_t pos_found = 0;

    if (!data_str.empty() && (std::isspace(data_str[0]) || std::isspace(data_str.back()))) {
        data_str = std::regex_replace(data_str, std::regex("\n"), "\\n");
        data_str = std::regex_replace(data_str, std::regex("\""), "\\\"");
        data_str = std::regex_replace(data_str, std::regex(R"(\\[^n"])"), R"(\$&)");
        data_str = "\"" + data_str + "\"";
        fprintf(stream, "%s: %s\n", prop_name, data_str.c_str());
        return;
    }

    if (data_str.find('\n') == std::string::npos) {
        fprintf(stream, "%s: %s\n", prop_name, data_str.c_str());
        return;
    }

    fprintf(stream, "%s: |\n", prop_name);
    while ((pos_found = data_str.find('\n', pos_start)) != std::string::npos) {
        fprintf(stream, "  %s\n", data_str.substr(pos_start, pos_found-pos_start).c_str());
        pos_start = pos_found + 1;
    }
}

std::string get_sortable_timestamp() {
    using clock = std::chrono::system_clock;

    const clock::time_point current_time = clock::now();
    const time_t as_time_t = clock::to_time_t(current_time);
    char timestamp_no_ns[100];
    std::strftime(timestamp_no_ns, 100, "%Y_%m_%d-%H_%M_%S", std::localtime(&as_time_t));

    const int64_t ns = std::chrono::duration_cast<std::chrono::nanoseconds>(
        current_time.time_since_epoch() % 1000000000).count();
    char timestamp_ns[11];
    snprintf(timestamp_ns, 11, "%09" PRId64, ns);

    return std::string(timestamp_no_ns) + "." + std::string(timestamp_ns);
}

void dump_non_result_info_yaml(FILE * stream, const gpt_params & params, const llama_context * lctx,
                               const std::string & timestamp, const std::vector<int> & prompt_tokens, const char * model_desc) {
    const llama_sampling_params & sparams = params.sparams;

    fprintf(stream, "build_commit: %s\n",        LLAMA_COMMIT);
    fprintf(stream, "build_number: %d\n",        LLAMA_BUILD_NUMBER);
    fprintf(stream, "cpu_has_arm_fma: %s\n",     ggml_cpu_has_arm_fma()     ? "true" : "false");
    fprintf(stream, "cpu_has_avx: %s\n",         ggml_cpu_has_avx()         ? "true" : "false");
    fprintf(stream, "cpu_has_avx_vnni: %s\n",    ggml_cpu_has_avx_vnni()    ? "true" : "false");
    fprintf(stream, "cpu_has_avx2: %s\n",        ggml_cpu_has_avx2()        ? "true" : "false");
    fprintf(stream, "cpu_has_avx512: %s\n",      ggml_cpu_has_avx512()      ? "true" : "false");
    fprintf(stream, "cpu_has_avx512_vbmi: %s\n", ggml_cpu_has_avx512_vbmi() ? "true" : "false");
    fprintf(stream, "cpu_has_avx512_vnni: %s\n", ggml_cpu_has_avx512_vnni() ? "true" : "false");
    fprintf(stream, "cpu_has_cublas: %s\n",      ggml_cpu_has_cublas()      ? "true" : "false");
    fprintf(stream, "cpu_has_vulkan: %s\n",      ggml_cpu_has_vulkan()      ? "true" : "false");
    fprintf(stream, "cpu_has_clblast: %s\n",     ggml_cpu_has_clblast()     ? "true" : "false");
    fprintf(stream, "cpu_has_kompute: %s\n",     ggml_cpu_has_kompute()     ? "true" : "false");
    fprintf(stream, "cpu_has_fma: %s\n",         ggml_cpu_has_fma()         ? "true" : "false");
    fprintf(stream, "cpu_has_gpublas: %s\n",     ggml_cpu_has_gpublas()     ? "true" : "false");
    fprintf(stream, "cpu_has_neon: %s\n",        ggml_cpu_has_neon()        ? "true" : "false");
    fprintf(stream, "cpu_has_f16c: %s\n",        ggml_cpu_has_f16c()        ? "true" : "false");
    fprintf(stream, "cpu_has_fp16_va: %s\n",     ggml_cpu_has_fp16_va()     ? "true" : "false");
    fprintf(stream, "cpu_has_wasm_simd: %s\n",   ggml_cpu_has_wasm_simd()   ? "true" : "false");
    fprintf(stream, "cpu_has_blas: %s\n",        ggml_cpu_has_blas()        ? "true" : "false");
    fprintf(stream, "cpu_has_sse3: %s\n",        ggml_cpu_has_sse3()        ? "true" : "false");
    fprintf(stream, "cpu_has_vsx: %s\n",         ggml_cpu_has_vsx()         ? "true" : "false");
    fprintf(stream, "cpu_has_matmul_int8: %s\n", ggml_cpu_has_matmul_int8() ? "true" : "false");

#ifdef NDEBUG
    fprintf(stream, "debug: false\n");
#else
    fprintf(stream, "debug: true\n");
#endif // NDEBUG

    fprintf(stream, "model_desc: %s\n", model_desc);
    fprintf(stream, "n_vocab: %d  # output size of the final layer, 32001 for some models\n", llama_n_vocab(llama_get_model(lctx)));

#ifdef __OPTIMIZE__
    fprintf(stream, "optimize: true\n");
#else
    fprintf(stream, "optimize: false\n");
#endif // __OPTIMIZE__

    fprintf(stream, "time: %s\n", timestamp.c_str());

    fprintf(stream, "\n");
    fprintf(stream, "###############\n");
    fprintf(stream, "# User Inputs #\n");
    fprintf(stream, "###############\n");
    fprintf(stream, "\n");

    fprintf(stream, "alias: %s # default: unknown\n", params.model_alias.c_str());
    fprintf(stream, "batch_size: %d # default: 512\n", params.n_batch);
    dump_string_yaml_multiline(stream, "cfg_negative_prompt", sparams.cfg_negative_prompt.c_str());
    fprintf(stream, "cfg_scale: %f # default: 1.0\n", sparams.cfg_scale);
    fprintf(stream, "chunks: %d # default: -1 (unlimited)\n", params.n_chunks);
    fprintf(stream, "color: %s # default: false\n", params.use_color ? "true" : "false");
    fprintf(stream, "ctx_size: %d # default: 512\n", params.n_ctx);
    fprintf(stream, "escape: %s # default: false\n", params.escape ? "true" : "false");
    fprintf(stream, "file: # never logged, see prompt instead. Can still be specified for input.\n");
    fprintf(stream, "frequency_penalty: %f # default: 0.0 \n", sparams.penalty_freq);
    dump_string_yaml_multiline(stream, "grammar", sparams.grammar.c_str());
    fprintf(stream, "grammar-file: # never logged, see grammar instead. Can still be specified for input.\n");
    fprintf(stream, "hellaswag: %s # default: false\n", params.hellaswag ? "true" : "false");
    fprintf(stream, "hellaswag_tasks: %zu # default: 400\n", params.hellaswag_tasks);

    const auto logit_bias_eos = sparams.logit_bias.find(llama_token_eos(llama_get_model(lctx)));
    const bool ignore_eos = logit_bias_eos != sparams.logit_bias.end() && logit_bias_eos->second == -INFINITY;
    fprintf(stream, "ignore_eos: %s # default: false\n", ignore_eos ? "true" : "false");

    dump_string_yaml_multiline(stream, "in_prefix", params.input_prefix.c_str());
    fprintf(stream, "in_prefix_bos: %s # default: false\n", params.input_prefix_bos ? "true" : "false");
    dump_string_yaml_multiline(stream, "in_suffix", params.input_prefix.c_str());
    fprintf(stream, "instruct: %s # default: false\n", params.instruct ? "true" : "false");
    fprintf(stream, "interactive: %s # default: false\n", params.interactive ? "true" : "false");
    fprintf(stream, "interactive_first: %s # default: false\n", params.interactive_first ? "true" : "false");
    fprintf(stream, "keep: %d # default: 0\n", params.n_keep);
    fprintf(stream, "logdir: %s # default: unset (no logging)\n", params.logdir.c_str());

    fprintf(stream, "logit_bias:\n");
    for (std::pair<llama_token, float> lb : sparams.logit_bias) {
        if (ignore_eos && lb.first == logit_bias_eos->first) {
            continue;
        }
        fprintf(stream, "  %d: %f", lb.first, lb.second);
    }

    fprintf(stream, "lora:\n");
    for (std::tuple<std::string, float> la : params.lora_adapter) {
        if (std::get<1>(la) != 1.0f) {
            continue;
        }
        fprintf(stream, "  - %s\n", std::get<0>(la).c_str());
    }
    fprintf(stream, "lora_scaled:\n");
    for (std::tuple<std::string, float> la : params.lora_adapter) {
        if (std::get<1>(la) == 1.0f) {
            continue;
        }
        fprintf(stream, "  - %s: %f\n", std::get<0>(la).c_str(), std::get<1>(la));
    }
    fprintf(stream, "lora_base: %s\n", params.lora_base.c_str());
    fprintf(stream, "main_gpu: %d # default: 0\n", params.main_gpu);
    fprintf(stream, "mirostat: %d # default: 0 (disabled)\n", sparams.mirostat);
    fprintf(stream, "mirostat_ent: %f # default: 5.0\n", sparams.mirostat_tau);
    fprintf(stream, "mirostat_lr: %f # default: 0.1\n", sparams.mirostat_eta);
    fprintf(stream, "mlock: %s # default: false\n", params.use_mlock ? "true" : "false");
    fprintf(stream, "model: %s # default: models/7B/ggml-model.bin\n", params.model.c_str());
    fprintf(stream, "model_draft: %s # default:\n", params.model_draft.c_str());
    fprintf(stream, "multiline_input: %s # default: false\n", params.multiline_input ? "true" : "false");
    fprintf(stream, "n_gpu_layers: %d # default: -1\n", params.n_gpu_layers);
    fprintf(stream, "n_predict: %d # default: -1 (unlimited)\n", params.n_predict);
    fprintf(stream, "n_probs: %d # only used by server binary, default: 0\n", sparams.n_probs);
    fprintf(stream, "no_mmap: %s # default: false\n", !params.use_mmap ? "true" : "false");
    fprintf(stream, "no_mul_mat_q: %s # default: false\n", !params.mul_mat_q ? "true" : "false");
    fprintf(stream, "no_penalize_nl: %s # default: false\n", !sparams.penalize_nl ? "true" : "false");
    fprintf(stream, "numa: %s # default: false\n", params.numa ? "true" : "false");
    fprintf(stream, "ppl_output_type: %d # default: 0\n", params.ppl_output_type);
    fprintf(stream, "ppl_stride: %d # default: 0\n", params.ppl_stride);
    fprintf(stream, "presence_penalty: %f # default: 0.0\n", sparams.penalty_present);
    dump_string_yaml_multiline(stream, "prompt", params.prompt.c_str());
    fprintf(stream, "prompt_cache: %s\n", params.path_prompt_cache.c_str());
    fprintf(stream, "prompt_cache_all: %s # default: false\n", params.prompt_cache_all ? "true" : "false");
    fprintf(stream, "prompt_cache_ro: %s # default: false\n", params.prompt_cache_ro ? "true" : "false");
    dump_vector_int_yaml(stream, "prompt_tokens", prompt_tokens);
    fprintf(stream, "random_prompt: %s # default: false\n", params.random_prompt ? "true" : "false");
    fprintf(stream, "repeat_penalty: %f # default: 1.1\n", sparams.penalty_repeat);

    fprintf(stream, "reverse_prompt:\n");
    for (std::string ap : params.antiprompt) {
        size_t pos = 0;
        while ((pos = ap.find('\n', pos)) != std::string::npos) {
            ap.replace(pos, 1, "\\n");
            pos += 1;
        }

        fprintf(stream, "  - %s\n", ap.c_str());
    }

    fprintf(stream, "rope_freq_base: %f # default: 10000.0\n", params.rope_freq_base);
    fprintf(stream, "rope_freq_scale: %f # default: 1.0\n", params.rope_freq_scale);
    fprintf(stream, "seed: %d # default: -1 (random seed)\n", params.seed);
    fprintf(stream, "simple_io: %s # default: false\n", params.simple_io ? "true" : "false");
    fprintf(stream, "cont_batching: %s # default: false\n", params.cont_batching ? "true" : "false");
    fprintf(stream, "temp: %f # default: 0.8\n", sparams.temp);

    const std::vector<float> tensor_split_vector(params.tensor_split, params.tensor_split + llama_max_devices());
    dump_vector_float_yaml(stream, "tensor_split", tensor_split_vector);

    fprintf(stream, "tfs: %f # default: 1.0\n", sparams.tfs_z);
    fprintf(stream, "threads: %d # default: %d\n", params.n_threads, std::thread::hardware_concurrency());
    fprintf(stream, "top_k: %d # default: 40\n", sparams.top_k);
    fprintf(stream, "top_p: %f # default: 0.95\n", sparams.top_p);
    fprintf(stream, "min_p: %f # default: 0.0\n", sparams.min_p);
    fprintf(stream, "typical_p: %f # default: 1.0\n", sparams.typical_p);
    fprintf(stream, "verbose_prompt: %s # default: false\n", params.verbose_prompt ? "true" : "false");
    fprintf(stream, "display_prompt: %s # default: true\n", params.display_prompt ? "true" : "false");
}

//
// KV cache utils
//

void dump_kv_cache_view(const llama_kv_cache_view & view, int row_size) {
    static const char slot_chars[] = ".123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+";

    printf("=== Dumping KV cache. total cells %d, max sequences per cell %d, populated cells %d, total tokens in cache %d, largest empty slot=%d @ %d",
        view.n_cells, view.n_max_seq, view.used_cells, view.token_count, view.max_contiguous, view.max_contiguous_idx);

    llama_kv_cache_view_cell * c_curr = view.cells;
    llama_seq_id * cs_curr = view.cells_sequences;

    for (int i = 0; i < view.n_cells; i++, c_curr++, cs_curr += view.n_max_seq) {
        if (i % row_size == 0) {
            printf("\n%5d: ", i);
        }
        int seq_count = 0;
        for (int j = 0; j < view.n_max_seq; j++) {
            if (cs_curr[j] >= 0) { seq_count++; }
        }
        putchar(slot_chars[std::min(sizeof(slot_chars) - 2, size_t(seq_count))]);
    }

    printf("\n=== Done dumping\n");
}

void dump_kv_cache_view_seqs(const llama_kv_cache_view & view, int row_size) {
    static const char slot_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    printf("=== Dumping KV cache. total cells %d, max sequences per cell %d, populated cells %d, total tokens in cache %d, largest empty slot=%d @ %d\n",
        view.n_cells, view.n_max_seq, view.used_cells, view.token_count, view.max_contiguous, view.max_contiguous_idx);

    std::unordered_map<llama_seq_id, size_t> seqs;
    llama_kv_cache_view_cell * c_curr = view.cells;
    llama_seq_id * cs_curr = view.cells_sequences;

    for (int i = 0; i < view.n_cells; i++, c_curr++, cs_curr += view.n_max_seq) {
        for (int j = 0; j < view.n_max_seq; j++) {
            if (cs_curr[j] < 0) { continue; }
            if (seqs.find(cs_curr[j]) == seqs.end()) {
                if (seqs.size() + 1 >= sizeof(slot_chars)) { break; }
                seqs[cs_curr[j]] = seqs.size();
            }
        }
        if (seqs.size() + 1 >= sizeof(slot_chars)) { break; }
    }

    printf("=== Sequence legend: ");
    for (const auto & it : seqs) {
        printf("%zu=%d, ", it.second, it.first);
    }
    printf("'+'=other sequence ids");

    c_curr = view.cells;
    cs_curr = view.cells_sequences;
    for (int i = 0; i < view.n_cells; i++, c_curr++, cs_curr += view.n_max_seq) {
        if (i % row_size == 0) {
            printf("\n%5d: ", i);
        }
        for (int j = 0; j < view.n_max_seq; j++) {
            if (cs_curr[j] >= 0) {
                const auto & it = seqs.find(cs_curr[j]);
                putchar(it != seqs.end() ? int(slot_chars[it->second]) : '+');
            } else {
                putchar('.');
            }
        }
        putchar(' ');
    }

    printf("\n=== Done dumping\n");
}