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1 files changed, 1137 insertions, 0 deletions

diff --git a/llama.cpp/common/console.cpp b/llama.cpp/common/console.cpp
new file mode 100644
index 0000000..2ea178f
--- /dev/null
+++ b/llama.cpp/common/console.cpp
@@ -0,0 +1,1137 @@
+#include "console.h"
+#include "log.h"
+#include <vector>
+#include <iostream>
+#include <cassert>
+#include <cstddef>
+#include <cctype>
+#include <cwctype>
+#include <cstdint>
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+#include <stdarg.h>
+
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
+#include <fcntl.h>
+#include <io.h>
+#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
+#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
+#endif
+#else
+#include <climits>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <wchar.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <termios.h>
+#endif
+
+#define ANSI_COLOR_RED     "\x1b[31m"
+#define ANSI_COLOR_GREEN   "\x1b[32m"
+#define ANSI_COLOR_YELLOW  "\x1b[33m"
+#define ANSI_COLOR_BLUE    "\x1b[34m"
+#define ANSI_COLOR_MAGENTA "\x1b[35m"
+#define ANSI_COLOR_CYAN    "\x1b[36m"
+#define ANSI_COLOR_GRAY    "\x1b[90m"
+#define ANSI_COLOR_RESET   "\x1b[0m"
+#define ANSI_BOLD          "\x1b[1m"
+
+namespace console {
+
+#if defined (_WIN32)
+    namespace {
+        // Use private-use unicode values to represent special keys that are not reported
+        // as characters (e.g. arrows on Windows). These values should never clash with
+        // real input and let the rest of the code handle navigation uniformly.
+        static constexpr char32_t KEY_ARROW_LEFT       = 0xE000;
+        static constexpr char32_t KEY_ARROW_RIGHT      = 0xE001;
+        static constexpr char32_t KEY_ARROW_UP         = 0xE002;
+        static constexpr char32_t KEY_ARROW_DOWN       = 0xE003;
+        static constexpr char32_t KEY_HOME             = 0xE004;
+        static constexpr char32_t KEY_END              = 0xE005;
+        static constexpr char32_t KEY_CTRL_ARROW_LEFT  = 0xE006;
+        static constexpr char32_t KEY_CTRL_ARROW_RIGHT = 0xE007;
+        static constexpr char32_t KEY_DELETE           = 0xE008;
+    }
+
+    //
+    // Console state
+    //
+#endif
+
+    static bool         advanced_display = false;
+    static bool         simple_io        = true;
+    static display_type current_display  = DISPLAY_TYPE_RESET;
+
+    static FILE*        out              = stdout;
+
+#if defined (_WIN32)
+    static void*        hConsole;
+#else
+    static FILE*        tty              = nullptr;
+    static termios      initial_state;
+#endif
+
+    //
+    // Init and cleanup
+    //
+
+    void init(bool use_simple_io, bool use_advanced_display) {
+        advanced_display = use_advanced_display;
+        simple_io = use_simple_io;
+#if defined(_WIN32)
+        // Windows-specific console initialization
+        DWORD dwMode = 0;
+        hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
+        if (hConsole == INVALID_HANDLE_VALUE || !GetConsoleMode(hConsole, &dwMode)) {
+            hConsole = GetStdHandle(STD_ERROR_HANDLE);
+            if (hConsole != INVALID_HANDLE_VALUE && (!GetConsoleMode(hConsole, &dwMode))) {
+                hConsole = nullptr;
+                simple_io = true;
+            }
+        }
+        if (hConsole) {
+            // Check conditions combined to reduce nesting
+            if (advanced_display && !(dwMode & ENABLE_VIRTUAL_TERMINAL_PROCESSING) &&
+                !SetConsoleMode(hConsole, dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING)) {
+                advanced_display = false;
+            }
+            // Set console output codepage to UTF8
+            SetConsoleOutputCP(CP_UTF8);
+        }
+        HANDLE hConIn = GetStdHandle(STD_INPUT_HANDLE);
+        if (hConIn != INVALID_HANDLE_VALUE && GetConsoleMode(hConIn, &dwMode)) {
+            // Set console input codepage to UTF16
+            _setmode(_fileno(stdin), _O_WTEXT);
+
+            // Set ICANON (ENABLE_LINE_INPUT) and ECHO (ENABLE_ECHO_INPUT)
+            if (simple_io) {
+                dwMode |= ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT;
+            } else {
+                dwMode &= ~(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT);
+            }
+            if (!SetConsoleMode(hConIn, dwMode)) {
+                simple_io = true;
+            }
+        }
+        if (simple_io) {
+            _setmode(_fileno(stdin), _O_U8TEXT);
+        }
+#else
+        // POSIX-specific console initialization
+        if (!simple_io) {
+            struct termios new_termios;
+            tcgetattr(STDIN_FILENO, &initial_state);
+            new_termios = initial_state;
+            new_termios.c_lflag &= ~(ICANON | ECHO);
+            new_termios.c_cc[VMIN] = 1;
+            new_termios.c_cc[VTIME] = 0;
+            tcsetattr(STDIN_FILENO, TCSANOW, &new_termios);
+
+            tty = fopen("/dev/tty", "w+");
+            if (tty != nullptr) {
+                out = tty;
+            }
+        }
+
+        setlocale(LC_ALL, "");
+#endif
+    }
+
+    void cleanup() {
+        // Reset console display
+        set_display(DISPLAY_TYPE_RESET);
+
+#if !defined(_WIN32)
+        // Restore settings on POSIX systems
+        if (!simple_io) {
+            if (tty != nullptr) {
+                out = stdout;
+                fclose(tty);
+                tty = nullptr;
+            }
+            tcsetattr(STDIN_FILENO, TCSANOW, &initial_state);
+        }
+#endif
+    }
+
+    //
+    // Display and IO
+    //
+
+    // Keep track of current display and only emit ANSI code if it changes
+    void set_display(display_type display) {
+        if (advanced_display && current_display != display) {
+            common_log_flush(common_log_main());
+            switch(display) {
+                case DISPLAY_TYPE_RESET:
+                    fprintf(out, ANSI_COLOR_RESET);
+                    break;
+                case DISPLAY_TYPE_INFO:
+                    fprintf(out, ANSI_COLOR_MAGENTA);
+                    break;
+                case DISPLAY_TYPE_PROMPT:
+                    fprintf(out, ANSI_COLOR_YELLOW);
+                    break;
+                case DISPLAY_TYPE_REASONING:
+                    fprintf(out, ANSI_COLOR_GRAY);
+                    break;
+                case DISPLAY_TYPE_USER_INPUT:
+                    fprintf(out, ANSI_BOLD ANSI_COLOR_GREEN);
+                    break;
+                case DISPLAY_TYPE_ERROR:
+                    fprintf(out, ANSI_BOLD ANSI_COLOR_RED);
+            }
+            current_display = display;
+            fflush(out);
+        }
+    }
+
+    static char32_t getchar32() {
+#if defined(_WIN32)
+        HANDLE hConsole = GetStdHandle(STD_INPUT_HANDLE);
+        wchar_t high_surrogate = 0;
+
+        while (true) {
+            INPUT_RECORD record;
+            DWORD count;
+            if (!ReadConsoleInputW(hConsole, &record, 1, &count) || count == 0) {
+                return WEOF;
+            }
+
+            if (record.EventType == KEY_EVENT && record.Event.KeyEvent.bKeyDown) {
+                wchar_t wc = record.Event.KeyEvent.uChar.UnicodeChar;
+                if (wc == 0) {
+                    const DWORD ctrl_mask = LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED;
+                    const bool ctrl_pressed = (record.Event.KeyEvent.dwControlKeyState & ctrl_mask) != 0;
+                    switch (record.Event.KeyEvent.wVirtualKeyCode) {
+                        case VK_LEFT:   return ctrl_pressed ? KEY_CTRL_ARROW_LEFT  : KEY_ARROW_LEFT;
+                        case VK_RIGHT:  return ctrl_pressed ? KEY_CTRL_ARROW_RIGHT : KEY_ARROW_RIGHT;
+                        case VK_UP:     return KEY_ARROW_UP;
+                        case VK_DOWN:   return KEY_ARROW_DOWN;
+                        case VK_HOME:   return KEY_HOME;
+                        case VK_END:    return KEY_END;
+                        case VK_DELETE: return KEY_DELETE;
+                        default:        continue;
+                    }
+                }
+
+                if ((wc >= 0xD800) && (wc <= 0xDBFF)) { // Check if wc is a high surrogate
+                    high_surrogate = wc;
+                    continue;
+                }
+                if ((wc >= 0xDC00) && (wc <= 0xDFFF)) { // Check if wc is a low surrogate
+                    if (high_surrogate != 0) { // Check if we have a high surrogate
+                        return ((high_surrogate - 0xD800) << 10) + (wc - 0xDC00) + 0x10000;
+                    }
+                }
+
+                high_surrogate = 0; // Reset the high surrogate
+                return static_cast<char32_t>(wc);
+            }
+        }
+#else
+        wchar_t wc = getwchar();
+        if (static_cast<wint_t>(wc) == WEOF) {
+            return WEOF;
+        }
+
+#if WCHAR_MAX == 0xFFFF
+        if ((wc >= 0xD800) && (wc <= 0xDBFF)) { // Check if wc is a high surrogate
+            wchar_t low_surrogate = getwchar();
+            if ((low_surrogate >= 0xDC00) && (low_surrogate <= 0xDFFF)) { // Check if the next wchar is a low surrogate
+                return (static_cast<char32_t>(wc & 0x03FF) << 10) + (low_surrogate & 0x03FF) + 0x10000;
+            }
+        }
+        if ((wc >= 0xD800) && (wc <= 0xDFFF)) { // Invalid surrogate pair
+            return 0xFFFD; // Return the replacement character U+FFFD
+        }
+#endif
+
+        return static_cast<char32_t>(wc);
+#endif
+    }
+
+    static void pop_cursor() {
+#if defined(_WIN32)
+        if (hConsole != NULL) {
+            CONSOLE_SCREEN_BUFFER_INFO bufferInfo;
+            GetConsoleScreenBufferInfo(hConsole, &bufferInfo);
+
+            COORD newCursorPosition = bufferInfo.dwCursorPosition;
+            if (newCursorPosition.X == 0) {
+                newCursorPosition.X = bufferInfo.dwSize.X - 1;
+                newCursorPosition.Y -= 1;
+            } else {
+                newCursorPosition.X -= 1;
+            }
+
+            SetConsoleCursorPosition(hConsole, newCursorPosition);
+            return;
+        }
+#endif
+        putc('\b', out);
+    }
+
+    static int estimateWidth(char32_t codepoint) {
+#if defined(_WIN32)
+        (void)codepoint;
+        return 1;
+#else
+        return wcwidth(codepoint);
+#endif
+    }
+
+    static int put_codepoint(const char* utf8_codepoint, size_t length, int expectedWidth) {
+#if defined(_WIN32)
+        CONSOLE_SCREEN_BUFFER_INFO bufferInfo;
+        if (!GetConsoleScreenBufferInfo(hConsole, &bufferInfo)) {
+            // go with the default
+            return expectedWidth;
+        }
+        COORD initialPosition = bufferInfo.dwCursorPosition;
+        DWORD nNumberOfChars = length;
+        WriteConsole(hConsole, utf8_codepoint, nNumberOfChars, &nNumberOfChars, NULL);
+
+        CONSOLE_SCREEN_BUFFER_INFO newBufferInfo;
+        GetConsoleScreenBufferInfo(hConsole, &newBufferInfo);
+
+        // Figure out our real position if we're in the last column
+        if (utf8_codepoint[0] != 0x09 && initialPosition.X == newBufferInfo.dwSize.X - 1) {
+            DWORD nNumberOfChars;
+            WriteConsole(hConsole, &" \b", 2, &nNumberOfChars, NULL);
+            GetConsoleScreenBufferInfo(hConsole, &newBufferInfo);
+        }
+
+        int width = newBufferInfo.dwCursorPosition.X - initialPosition.X;
+        if (width < 0) {
+            width += newBufferInfo.dwSize.X;
+        }
+        return width;
+#else
+        // We can trust expectedWidth if we've got one
+        if (expectedWidth >= 0 || tty == nullptr) {
+            fwrite(utf8_codepoint, length, 1, out);
+            return expectedWidth;
+        }
+
+        fputs("\033[6n", tty); // Query cursor position
+        int x1;
+        int y1;
+        int x2;
+        int y2;
+        int results = 0;
+        results = fscanf(tty, "\033[%d;%dR", &y1, &x1);
+
+        fwrite(utf8_codepoint, length, 1, tty);
+
+        fputs("\033[6n", tty); // Query cursor position
+        results += fscanf(tty, "\033[%d;%dR", &y2, &x2);
+
+        if (results != 4) {
+            return expectedWidth;
+        }
+
+        int width = x2 - x1;
+        if (width < 0) {
+            // Calculate the width considering text wrapping
+            struct winsize w;
+            ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+            width += w.ws_col;
+        }
+        return width;
+#endif
+    }
+
+    static void replace_last(char ch) {
+#if defined(_WIN32)
+        pop_cursor();
+        put_codepoint(&ch, 1, 1);
+#else
+        fprintf(out, "\b%c", ch);
+#endif
+    }
+
+    static char32_t decode_utf8(const std::string & input, size_t pos, size_t & advance) {
+        unsigned char c = static_cast<unsigned char>(input[pos]);
+        if ((c & 0x80u) == 0u) {
+            advance = 1;
+            return c;
+        }
+        if ((c & 0xE0u) == 0xC0u && pos + 1 < input.size()) {
+            unsigned char c1 = static_cast<unsigned char>(input[pos + 1]);
+            if ((c1 & 0xC0u) != 0x80u) {
+                advance = 1;
+                return 0xFFFD;
+            }
+            advance = 2;
+            return ((c & 0x1Fu) << 6) | (static_cast<unsigned char>(input[pos + 1]) & 0x3Fu);
+        }
+        if ((c & 0xF0u) == 0xE0u && pos + 2 < input.size()) {
+            unsigned char c1 = static_cast<unsigned char>(input[pos + 1]);
+            unsigned char c2 = static_cast<unsigned char>(input[pos + 2]);
+            if ((c1 & 0xC0u) != 0x80u || (c2 & 0xC0u) != 0x80u) {
+                advance = 1;
+                return 0xFFFD;
+            }
+            advance = 3;
+            return ((c & 0x0Fu) << 12) |
+                   ((static_cast<unsigned char>(input[pos + 1]) & 0x3Fu) << 6) |
+                   (static_cast<unsigned char>(input[pos + 2]) & 0x3Fu);
+        }
+        if ((c & 0xF8u) == 0xF0u && pos + 3 < input.size()) {
+            unsigned char c1 = static_cast<unsigned char>(input[pos + 1]);
+            unsigned char c2 = static_cast<unsigned char>(input[pos + 2]);
+            unsigned char c3 = static_cast<unsigned char>(input[pos + 3]);
+            if ((c1 & 0xC0u) != 0x80u || (c2 & 0xC0u) != 0x80u || (c3 & 0xC0u) != 0x80u) {
+                advance = 1;
+                return 0xFFFD;
+            }
+            advance = 4;
+            return ((c & 0x07u) << 18) |
+                   ((static_cast<unsigned char>(input[pos + 1]) & 0x3Fu) << 12) |
+                   ((static_cast<unsigned char>(input[pos + 2]) & 0x3Fu) << 6) |
+                   (static_cast<unsigned char>(input[pos + 3]) & 0x3Fu);
+        }
+
+        advance = 1;
+        return 0xFFFD; // replacement character for invalid input
+    }
+
+    static void append_utf8(char32_t ch, std::string & out) {
+        if (ch <= 0x7F) {
+            out.push_back(static_cast<unsigned char>(ch));
+        } else if (ch <= 0x7FF) {
+            out.push_back(static_cast<unsigned char>(0xC0 | ((ch >> 6) & 0x1F)));
+            out.push_back(static_cast<unsigned char>(0x80 | (ch & 0x3F)));
+        } else if (ch <= 0xFFFF) {
+            out.push_back(static_cast<unsigned char>(0xE0 | ((ch >> 12) & 0x0F)));
+            out.push_back(static_cast<unsigned char>(0x80 | ((ch >> 6) & 0x3F)));
+            out.push_back(static_cast<unsigned char>(0x80 | (ch & 0x3F)));
+        } else if (ch <= 0x10FFFF) {
+            out.push_back(static_cast<unsigned char>(0xF0 | ((ch >> 18) & 0x07)));
+            out.push_back(static_cast<unsigned char>(0x80 | ((ch >> 12) & 0x3F)));
+            out.push_back(static_cast<unsigned char>(0x80 | ((ch >> 6) & 0x3F)));
+            out.push_back(static_cast<unsigned char>(0x80 | (ch & 0x3F)));
+        } else {
+            // Invalid Unicode code point
+        }
+    }
+
+    // Helper function to remove the last UTF-8 character from a string
+    static size_t prev_utf8_char_pos(const std::string & line, size_t pos) {
+        if (pos == 0) return 0;
+        pos--;
+        while (pos > 0 && (line[pos] & 0xC0) == 0x80) {
+            pos--;
+        }
+        return pos;
+    }
+
+    static size_t next_utf8_char_pos(const std::string & line, size_t pos) {
+        if (pos >= line.length()) return line.length();
+        pos++;
+        while (pos < line.length() && (line[pos] & 0xC0) == 0x80) {
+            pos++;
+        }
+        return pos;
+    }
+
+    static void move_cursor(int delta);
+    static void move_word_left(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line);
+    static void move_word_right(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line);
+    static void move_to_line_start(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths);
+    static void move_to_line_end(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line);
+
+    static void delete_at_cursor(std::string & line, std::vector<int> & widths, size_t & char_pos, size_t & byte_pos) {
+        if (char_pos >= widths.size()) {
+            return;
+        }
+
+        size_t next_pos = next_utf8_char_pos(line, byte_pos);
+        int w = widths[char_pos];
+        size_t char_len = next_pos - byte_pos;
+
+        line.erase(byte_pos, char_len);
+        widths.erase(widths.begin() + char_pos);
+
+        size_t p = byte_pos;
+        int tail_width = 0;
+        for (size_t i = char_pos; i < widths.size(); ++i) {
+            size_t following = next_utf8_char_pos(line, p);
+            put_codepoint(line.c_str() + p, following - p, widths[i]);
+            tail_width += widths[i];
+            p = following;
+        }
+
+        for (int i = 0; i < w; ++i) {
+            fputc(' ', out);
+        }
+
+        move_cursor(-(tail_width + w));
+    }
+
+    static void clear_current_line(const std::vector<int> & widths) {
+        int total_width = 0;
+        for (int w : widths) {
+            total_width += (w > 0 ? w : 1);
+        }
+
+        if (total_width > 0) {
+            std::string spaces(total_width, ' ');
+            fwrite(spaces.c_str(), 1, total_width, out);
+            move_cursor(-total_width);
+        }
+    }
+
+    static void set_line_contents(std::string new_line, std::string & line, std::vector<int> & widths, size_t & char_pos,
+                                  size_t & byte_pos) {
+        move_to_line_start(char_pos, byte_pos, widths);
+        clear_current_line(widths);
+
+        line = std::move(new_line);
+        widths.clear();
+        byte_pos = 0;
+        char_pos = 0;
+
+        size_t idx = 0;
+        while (idx < line.size()) {
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, idx, advance);
+            int expected_width = estimateWidth(cp);
+            int real_width = put_codepoint(line.c_str() + idx, advance, expected_width);
+            if (real_width < 0) real_width = 0;
+            widths.push_back(real_width);
+            idx += advance;
+            ++char_pos;
+            byte_pos = idx;
+        }
+    }
+
+    static void move_to_line_start(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths) {
+        int back_width = 0;
+        for (size_t i = 0; i < char_pos; ++i) {
+            back_width += widths[i];
+        }
+        move_cursor(-back_width);
+        char_pos = 0;
+        byte_pos = 0;
+    }
+
+    static void move_to_line_end(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line) {
+        int forward_width = 0;
+        for (size_t i = char_pos; i < widths.size(); ++i) {
+            forward_width += widths[i];
+        }
+        move_cursor(forward_width);
+        char_pos = widths.size();
+        byte_pos = line.length();
+    }
+
+    static bool has_ctrl_modifier(const std::string & params) {
+        size_t start = 0;
+        while (start < params.size()) {
+            size_t end = params.find(';', start);
+            size_t len = (end == std::string::npos) ? params.size() - start : end - start;
+            if (len > 0) {
+                int value = 0;
+                for (size_t i = 0; i < len; ++i) {
+                    char ch = params[start + i];
+                    if (!std::isdigit(static_cast<unsigned char>(ch))) {
+                        value = -1;
+                        break;
+                    }
+                    value = value * 10 + (ch - '0');
+                }
+                if (value == 5) {
+                    return true;
+                }
+            }
+
+            if (end == std::string::npos) {
+                break;
+            }
+            start = end + 1;
+        }
+        return false;
+    }
+
+    static bool is_space_codepoint(char32_t cp) {
+        return std::iswspace(static_cast<wint_t>(cp)) != 0;
+    }
+
+    static void move_word_left(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line) {
+        if (char_pos == 0) {
+            return;
+        }
+
+        size_t new_char_pos = char_pos;
+        size_t new_byte_pos = byte_pos;
+        int move_width = 0;
+
+        while (new_char_pos > 0) {
+            size_t prev_byte = prev_utf8_char_pos(line, new_byte_pos);
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, prev_byte, advance);
+            if (!is_space_codepoint(cp)) {
+                break;
+            }
+            move_width += widths[new_char_pos - 1];
+            new_char_pos--;
+            new_byte_pos = prev_byte;
+        }
+
+        while (new_char_pos > 0) {
+            size_t prev_byte = prev_utf8_char_pos(line, new_byte_pos);
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, prev_byte, advance);
+            if (is_space_codepoint(cp)) {
+                break;
+            }
+            move_width += widths[new_char_pos - 1];
+            new_char_pos--;
+            new_byte_pos = prev_byte;
+        }
+
+        move_cursor(-move_width);
+        char_pos = new_char_pos;
+        byte_pos = new_byte_pos;
+    }
+
+    static void move_word_right(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths, const std::string & line) {
+        if (char_pos >= widths.size()) {
+            return;
+        }
+
+        size_t new_char_pos = char_pos;
+        size_t new_byte_pos = byte_pos;
+        int move_width = 0;
+
+        while (new_char_pos < widths.size()) {
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, new_byte_pos, advance);
+            if (!is_space_codepoint(cp)) {
+                break;
+            }
+            move_width += widths[new_char_pos];
+            new_char_pos++;
+            new_byte_pos += advance;
+        }
+
+        while (new_char_pos < widths.size()) {
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, new_byte_pos, advance);
+            if (is_space_codepoint(cp)) {
+                break;
+            }
+            move_width += widths[new_char_pos];
+            new_char_pos++;
+            new_byte_pos += advance;
+        }
+
+        while (new_char_pos < widths.size()) {
+            size_t advance = 0;
+            char32_t cp = decode_utf8(line, new_byte_pos, advance);
+            if (!is_space_codepoint(cp)) {
+                break;
+            }
+            move_width += widths[new_char_pos];
+            new_char_pos++;
+            new_byte_pos += advance;
+        }
+
+        move_cursor(move_width);
+        char_pos = new_char_pos;
+        byte_pos = new_byte_pos;
+    }
+
+    static void move_cursor(int delta) {
+        if (delta == 0) return;
+#if defined(_WIN32)
+        if (hConsole != NULL) {
+            CONSOLE_SCREEN_BUFFER_INFO bufferInfo;
+            GetConsoleScreenBufferInfo(hConsole, &bufferInfo);
+            COORD newCursorPosition = bufferInfo.dwCursorPosition;
+            int width = bufferInfo.dwSize.X;
+            int newX = newCursorPosition.X + delta;
+            int newY = newCursorPosition.Y;
+
+            while (newX >= width) {
+                newX -= width;
+                newY++;
+            }
+            while (newX < 0) {
+                newX += width;
+                newY--;
+            }
+
+            newCursorPosition.X = newX;
+            newCursorPosition.Y = newY;
+            SetConsoleCursorPosition(hConsole, newCursorPosition);
+        }
+#else
+        if (delta < 0) {
+            for (int i = 0; i < -delta; i++) fprintf(out, "\b");
+        } else {
+            for (int i = 0; i < delta; i++) fprintf(out, "\033[C");
+        }
+#endif
+    }
+
+    struct history_t {
+        std::vector<std::string> entries;
+        size_t viewing_idx = SIZE_MAX;
+        std::string backup_line; // current line before viewing history
+        void add(const std::string & line) {
+            if (line.empty()) {
+                return;
+            }
+            // avoid duplicates with the last entry
+            if (entries.empty() || entries.back() != line) {
+                entries.push_back(line);
+            }
+            // also clear viewing state
+            end_viewing();
+        }
+        bool prev(std::string & cur_line) {
+            if (entries.empty()) {
+                return false;
+            }
+            if (viewing_idx == SIZE_MAX) {
+                return false;
+            }
+            if (viewing_idx > 0) {
+                viewing_idx--;
+            }
+            cur_line = entries[viewing_idx];
+            return true;
+        }
+        bool next(std::string & cur_line) {
+            if (entries.empty() || viewing_idx == SIZE_MAX) {
+                return false;
+            }
+            viewing_idx++;
+            if (viewing_idx >= entries.size()) {
+                cur_line = backup_line;
+                end_viewing();
+            } else {
+                cur_line = entries[viewing_idx];
+            }
+            return true;
+        }
+        void begin_viewing(const std::string & line) {
+            backup_line = line;
+            viewing_idx = entries.size();
+        }
+        void end_viewing() {
+            viewing_idx = SIZE_MAX;
+            backup_line.clear();
+        }
+        bool is_viewing() const {
+            return viewing_idx != SIZE_MAX;
+        }
+    } history;
+
+    static bool readline_advanced(std::string & line, bool multiline_input) {
+        if (out != stdout) {
+            fflush(stdout);
+        }
+
+        line.clear();
+        std::vector<int> widths;
+        bool is_special_char = false;
+        bool end_of_stream = false;
+
+        size_t byte_pos = 0; // current byte index
+        size_t char_pos = 0; // current character index (one char can be multiple bytes)
+
+        char32_t input_char;
+        while (true) {
+            assert(char_pos <= byte_pos);
+            assert(char_pos <= widths.size());
+            auto history_prev = [&]() {
+                if (!history.is_viewing()) {
+                    history.begin_viewing(line);
+                }
+                std::string new_line;
+                if (!history.prev(new_line)) {
+                    return;
+                }
+                set_line_contents(new_line, line, widths, char_pos, byte_pos);
+            };
+            auto history_next = [&]() {
+                if (history.is_viewing()) {
+                    std::string new_line;
+                    if (!history.next(new_line)) {
+                        return;
+                    }
+                    set_line_contents(new_line, line, widths, char_pos, byte_pos);
+                }
+            };
+
+            fflush(out); // Ensure all output is displayed before waiting for input
+            input_char = getchar32();
+
+            if (input_char == '\r' || input_char == '\n') {
+                break;
+            }
+
+            if (input_char == (char32_t) WEOF || input_char == 0x04 /* Ctrl+D */) {
+                end_of_stream = true;
+                break;
+            }
+
+            if (is_special_char) {
+                replace_last(line.back());
+                is_special_char = false;
+            }
+
+            if (input_char == '\033') { // Escape sequence
+                char32_t code = getchar32();
+                if (code == '[') {
+                    std::string params;
+                    while (true) {
+                        code = getchar32();
+                        if ((code >= 'A' && code <= 'Z') || (code >= 'a' && code <= 'z') || code == '~' || code == (char32_t) WEOF) {
+                            break;
+                        }
+                        params.push_back(static_cast<char>(code));
+                    }
+
+                    const bool ctrl_modifier = has_ctrl_modifier(params);
+
+                    if (code == 'D') { // left
+                        if (ctrl_modifier) {
+                            move_word_left(char_pos, byte_pos, widths, line);
+                        } else if (char_pos > 0) {
+                            int w = widths[char_pos - 1];
+                            move_cursor(-w);
+                            char_pos--;
+                            byte_pos = prev_utf8_char_pos(line, byte_pos);
+                        }
+                    } else if (code == 'C') { // right
+                        if (ctrl_modifier) {
+                            move_word_right(char_pos, byte_pos, widths, line);
+                        } else if (char_pos < widths.size()) {
+                            int w = widths[char_pos];
+                            move_cursor(w);
+                            char_pos++;
+                            byte_pos = next_utf8_char_pos(line, byte_pos);
+                        }
+                    } else if (code == 'H') { // home
+                        move_to_line_start(char_pos, byte_pos, widths);
+                    } else if (code == 'F') { // end
+                        move_to_line_end(char_pos, byte_pos, widths, line);
+                    } else if (code == 'A' || code == 'B') {
+                        // up/down
+                        if (code == 'A') {
+                            history_prev();
+                            is_special_char = false;
+                        } else if (code == 'B') {
+                            history_next();
+                            is_special_char = false;
+                        }
+                    } else if ((code == '~' || (code >= 'A' && code <= 'Z') || (code >= 'a' && code <= 'z')) && !params.empty()) {
+                        std::string digits;
+                        for (char ch : params) {
+                            if (ch == ';') {
+                                break;
+                            }
+                            if (std::isdigit(static_cast<unsigned char>(ch))) {
+                                digits.push_back(ch);
+                            }
+                        }
+
+                        if (code == '~') {
+                            if (digits == "1" || digits == "7") { // home
+                                move_to_line_start(char_pos, byte_pos, widths);
+                            } else if (digits == "4" || digits == "8") { // end
+                                move_to_line_end(char_pos, byte_pos, widths, line);
+                            } else if (digits == "3") { // delete
+                                delete_at_cursor(line, widths, char_pos, byte_pos);
+                            }
+                        }
+                    }
+                } else if (code == 0x1B) {
+                    // Discard the rest of the escape sequence
+                    while ((code = getchar32()) != (char32_t) WEOF) {
+                        if ((code >= 'A' && code <= 'Z') || (code >= 'a' && code <= 'z') || code == '~') {
+                            break;
+                        }
+                    }
+                }
+#if defined(_WIN32)
+            } else if (input_char == KEY_ARROW_LEFT) {
+                if (char_pos > 0) {
+                    int w = widths[char_pos - 1];
+                    move_cursor(-w);
+                    char_pos--;
+                    byte_pos = prev_utf8_char_pos(line, byte_pos);
+                }
+            } else if (input_char == KEY_ARROW_RIGHT) {
+                if (char_pos < widths.size()) {
+                    int w = widths[char_pos];
+                    move_cursor(w);
+                    char_pos++;
+                    byte_pos = next_utf8_char_pos(line, byte_pos);
+                }
+            } else if (input_char == KEY_CTRL_ARROW_LEFT) {
+                move_word_left(char_pos, byte_pos, widths, line);
+            } else if (input_char == KEY_CTRL_ARROW_RIGHT) {
+                move_word_right(char_pos, byte_pos, widths, line);
+            } else if (input_char == KEY_HOME) {
+                move_to_line_start(char_pos, byte_pos, widths);
+            } else if (input_char == KEY_END) {
+                move_to_line_end(char_pos, byte_pos, widths, line);
+            } else if (input_char == KEY_DELETE) {
+                delete_at_cursor(line, widths, char_pos, byte_pos);
+            } else if (input_char == KEY_ARROW_UP || input_char == KEY_ARROW_DOWN) {
+                if (input_char == KEY_ARROW_UP) {
+                    history_prev();
+                    is_special_char = false;
+                } else if (input_char == KEY_ARROW_DOWN) {
+                    history_next();
+                    is_special_char = false;
+                }
+#endif
+            } else if (input_char == 0x08 || input_char == 0x7F) { // Backspace
+                if (char_pos > 0) {
+                    int w = widths[char_pos - 1];
+                    move_cursor(-w);
+                    char_pos--;
+                    size_t prev_pos = prev_utf8_char_pos(line, byte_pos);
+                    size_t char_len = byte_pos - prev_pos;
+                    byte_pos = prev_pos;
+
+                    // remove the character
+                    line.erase(byte_pos, char_len);
+                    widths.erase(widths.begin() + char_pos);
+
+                    // redraw tail
+                    size_t p = byte_pos;
+                    int tail_width = 0;
+                    for (size_t i = char_pos; i < widths.size(); ++i) {
+                        size_t next_p = next_utf8_char_pos(line, p);
+                        put_codepoint(line.c_str() + p, next_p - p, widths[i]);
+                        tail_width += widths[i];
+                        p = next_p;
+                    }
+
+                    // clear display
+                    for (int i = 0; i < w; ++i) {
+                        fputc(' ', out);
+                    }
+                    move_cursor(-(tail_width + w));
+                }
+            } else {
+                // insert character
+                std::string new_char_str;
+                append_utf8(input_char, new_char_str);
+                int w = estimateWidth(input_char);
+
+                if (char_pos == widths.size()) {
+                    // insert at the end
+                    line += new_char_str;
+                    int real_w = put_codepoint(new_char_str.c_str(), new_char_str.length(), w);
+                    if (real_w < 0) real_w = 0;
+                    widths.push_back(real_w);
+                    byte_pos += new_char_str.length();
+                    char_pos++;
+                } else {
+                    // insert in middle
+                    line.insert(byte_pos, new_char_str);
+
+                    int real_w = put_codepoint(new_char_str.c_str(), new_char_str.length(), w);
+                    if (real_w < 0) real_w = 0;
+
+                    widths.insert(widths.begin() + char_pos, real_w);
+
+                    // print the tail
+                    size_t p = byte_pos + new_char_str.length();
+                    int tail_width = 0;
+                    for (size_t i = char_pos + 1; i < widths.size(); ++i) {
+                        size_t next_p = next_utf8_char_pos(line, p);
+                        put_codepoint(line.c_str() + p, next_p - p, widths[i]);
+                        tail_width += widths[i];
+                        p = next_p;
+                    }
+
+                    move_cursor(-tail_width);
+
+                    byte_pos += new_char_str.length();
+                    char_pos++;
+                }
+            }
+
+            if (!line.empty() && (line.back() == '\\' || line.back() == '/')) {
+                replace_last(line.back());
+                is_special_char = true;
+            }
+        }
+
+        bool has_more = multiline_input;
+        if (is_special_char) {
+            replace_last(' ');
+            pop_cursor();
+
+            char last = line.back();
+            line.pop_back();
+            if (last == '\\') {
+                line += '\n';
+                fputc('\n', out);
+                has_more = !has_more;
+            } else {
+                // llama will just eat the single space, it won't act as a space
+                if (line.length() == 1 && line.back() == ' ') {
+                    line.clear();
+                    pop_cursor();
+                }
+                has_more = false;
+            }
+        } else {
+            if (end_of_stream) {
+                has_more = false;
+            } else {
+                line += '\n';
+                fputc('\n', out);
+            }
+        }
+
+        if (!end_of_stream && !line.empty()) {
+            // remove the trailing newline for history storage
+            if (!line.empty() && line.back() == '\n') {
+                line.pop_back();
+            }
+            // TODO: maybe support multiline history entries?
+            history.add(line);
+        }
+
+        fflush(out);
+        return has_more;
+    }
+
+    static bool readline_simple(std::string & line, bool multiline_input) {
+#if defined(_WIN32)
+        std::wstring wline;
+        if (!std::getline(std::wcin, wline)) {
+            // Input stream is bad or EOF received
+            line.clear();
+            GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0);
+            return false;
+        }
+
+        int size_needed = WideCharToMultiByte(CP_UTF8, 0, &wline[0], (int)wline.size(), NULL, 0, NULL, NULL);
+        line.resize(size_needed);
+        WideCharToMultiByte(CP_UTF8, 0, &wline[0], (int)wline.size(), &line[0], size_needed, NULL, NULL);
+#else
+        if (!std::getline(std::cin, line)) {
+            // Input stream is bad or EOF received
+            line.clear();
+            return false;
+        }
+#endif
+        if (!line.empty()) {
+            char last = line.back();
+            if (last == '/') { // Always return control on '/' symbol
+                line.pop_back();
+                return false;
+            }
+            if (last == '\\') { // '\\' changes the default action
+                line.pop_back();
+                multiline_input = !multiline_input;
+            }
+        }
+        line += '\n';
+
+        // By default, continue input if multiline_input is set
+        return multiline_input;
+    }
+
+    bool readline(std::string & line, bool multiline_input) {
+        if (simple_io) {
+            return readline_simple(line, multiline_input);
+        }
+        return readline_advanced(line, multiline_input);
+    }
+
+    namespace spinner {
+        static const char LOADING_CHARS[] = {'|', '/', '-', '\\'};
+        static std::condition_variable cv_stop;
+        static std::thread th;
+        static size_t frame = 0; // only modified by one thread
+        static bool running = false;
+        static std::mutex mtx;
+        static auto wait_time = std::chrono::milliseconds(100);
+        static void draw_next_frame() {
+            // don't need lock because only one thread modifies running
+            frame = (frame + 1) % sizeof(LOADING_CHARS);
+            replace_last(LOADING_CHARS[frame]);
+            fflush(out);
+        }
+        void start() {
+            std::unique_lock<std::mutex> lock(mtx);
+            if (simple_io || running) {
+                return;
+            }
+            common_log_flush(common_log_main());
+            fprintf(out, "%c", LOADING_CHARS[0]);
+            fflush(out);
+            frame = 1;
+            running = true;
+            th = std::thread([]() {
+                std::unique_lock<std::mutex> lock(mtx);
+                while (true) {
+                    if (cv_stop.wait_for(lock, wait_time, []{ return !running; })) {
+                        break;
+                    }
+                    draw_next_frame();
+                }
+            });
+        }
+        void stop() {
+            {
+                std::unique_lock<std::mutex> lock(mtx);
+                if (simple_io || !running) {
+                    return;
+                }
+                running = false;
+                cv_stop.notify_all();
+            }
+            if (th.joinable()) {
+                th.join();
+            }
+            replace_last(' ');
+            pop_cursor();
+            fflush(out);
+        }
+    }
+
+    void log(const char * fmt, ...) {
+        va_list args;
+        va_start(args, fmt);
+        vfprintf(out, fmt, args);
+        va_end(args);
+    }
+
+    void error(const char * fmt, ...) {
+        va_list args;
+        va_start(args, fmt);
+        display_type cur = current_display;
+        set_display(DISPLAY_TYPE_ERROR);
+        vfprintf(out, fmt, args);
+        set_display(cur); // restore previous color
+        va_end(args);
+    }
+
+    void flush() {
+        fflush(out);
+    }
+}