Odstraněny funkce parse_i32 a parse_u32, funkce přesunuty do souboru int.c

Makefile

@@ -37,6 +37,7 @@ KERNEL_OBJS := \
 	$(BUILD)/kernel/syscall.o \
 	$(BUILD)/kernel/aster_api.o \
 	$(BUILD)/kernel/string.o \
+	$(BUILD)/kernel/int.o \
 	$(BUILD)/drivers/display.o \
 	$(BUILD)/drivers/keyboard.o \
 	$(BUILD)/drivers/serial.o \

apps/calc_app.c

@@ -50,7 +50,6 @@ void app_calc_main(void) {
     char n1[16];
     char n2[16];
     char nr[16];
-    char line[80];
     int a = 24;
     int b = 18;
     int r = a + b;
@@ -59,7 +58,6 @@ void app_calc_main(void) {
     append_number(n2, b);
     append_number(nr, r);
 
-    line[0] = '\0';
     aster_api_print("[calc_app] start\n");
     aster_api_print("[calc_app] ");
     aster_api_print(n1);

include/int.h

@@ -0,0 +1,7 @@
+#ifndef ASTER_INT_H
+#define ASTER_INT_H
+
+unsigned long parse_u32(const char *s, int *ok);
+long parse_i32(const char *s, int *ok);
+
+#endif

include/keyboard.h

@@ -0,0 +1,19 @@
+/*
+ * AsterOS Kernel
+ * Autor: Pavel Kalaš
+ * Rok: 2026
+ *
+ */
+
+/*
+ * Tento soubor deklaruje rozhrani pro PS/2 klavesnici.
+ * Poskytuje funkce pro cteni stisknutych klaves a nacitani
+ * celych radku textu od uzivatele.
+ */
+
+ #ifndef KEYBOARD_H
+#define KEYBOARD_H
+
+int keyboard_readline(char *buffer, int max_len);
+
+#endif

include/string.h

@@ -22,4 +22,14 @@ int aster_strncmp(const char *a, const char *b, usize n);
 void *aster_memcpy(void *dst, const void *src, usize n);
 void *aster_memset(void *dst, int v, usize n);
 
+char *aster_strstr(const char *haystack, const char *needle);
+char *aster_trim(char *str);
+int aster_substring(char *dst, usize dstsize, const char *src, usize start, usize length);
+char *aster_remove(char *str, const char *substr);
+int aster_split(char *str, const char *delim, char **tokens, usize max_tokens);
+int aster_contains(const char *str, const char *substr);
+int aster_starts_with(const char *str, const char *prefix);
+int aster_ends_with(const char *str, const char *suffix);
+char *aster_strcpy(char *dst, const char *src);
+
 #endif

kernel/int.c

@@ -0,0 +1,44 @@
+#include "int.h"
+
+unsigned long parse_u32(const char *s, int *ok) {
+    unsigned long value = 0;
+    *ok = 0;
+
+    if (!s || *s == '\0') {
+        return 0;
+    }
+
+    while (*s) {
+        if (*s < '0' || *s > '9') {
+            return 0;
+        }
+
+        value = value * 10UL + (unsigned long)(*s - '0');
+        ++s;
+    }
+
+    *ok = 1;
+    return value;
+}
+
+long parse_i32(const char *s, int *ok) {
+    int sign = 1;
+    unsigned long v;
+
+    if (!s || *s == '\0') {
+        *ok = 0;
+        return 0;
+    }
+
+    if (*s == '-') {
+        sign = -1;
+        ++s;
+    }
+
+    v = parse_u32(s, ok);
+    if (!*ok) {
+        return 0;
+    }
+
+    return (long)v * (long)sign;
+}

kernel/main.c

@@ -24,6 +24,7 @@
 #include "sysapps_runtime.h"
 #include "syscall.h"
 #include "timer.h"
+#include "int.h"
 
 void app_tetris_main(void);
 extern const sysapp_entry_t g_sysapps[];
@@ -195,7 +196,7 @@ static void render_shell_statusbar(void) {
     right[0] = '\0';
     middle[0] = '\0';
 
-    display_fill_row(SCREEN_H - 1, ' ', 0x0E, 0x08);
+    display_fill_row(SCREEN_H - 1, ' ', 0, 0);
 
     if (!g_status_marquee_only) {
         usize p = 0;
@@ -206,9 +207,9 @@ static void render_shell_statusbar(void) {
         p = append_text(left, p, sizeof(left), " pouzite=");
         p = append_uint(left, p, sizeof(left), (unsigned int)used);
         (void)p;
-        display_write_at(SCREEN_H - 1, 0, left, 0x0E, 0x08);
+        display_write_at(SCREEN_H - 1, 0, left, 0x0E, 0);
     } else if (g_status_left_hint_on) {
-        display_write_at(SCREEN_H - 1, 0, g_status_left_hint, 0x0E, 0x08);
+        display_write_at(SCREEN_H - 1, 0, g_status_left_hint, 0x0E, 0);
         llen = 0;
         while (g_status_left_hint[llen]) {
             ++llen;
@@ -255,13 +256,13 @@ static void render_shell_statusbar(void) {
             middle_start = llen + 1;
         }
         if (middle_start + mlen + 1 < SCREEN_W) {
-            display_write_at(SCREEN_H - 1, middle_start, middle, 0x0E, 0x08);
+            display_write_at(SCREEN_H - 1, middle_start, middle, 0x0E, 0);
         }
     }
 
     if (!g_status_marquee_only) {
         right_start = (rlen < SCREEN_W) ? (SCREEN_W - rlen) : 0;
-        display_write_at(SCREEN_H - 1, right_start, right, 0x0E, 0x08);
+        display_write_at(SCREEN_H - 1, right_start, right, 0x0E, 0);
     }
 
     if (save_row >= SCREEN_H - 1) {
@@ -348,46 +349,6 @@ static void boot_splash_push_log(const char *text) {
     boot_splash_render_log();
 }
 
-static void boot_splash_begin(unsigned int total_steps) {
-    const usize bar_w = 34;
-    usize i;
-    char bar[36];
-
-    if (total_steps == 0) {
-        total_steps = 1;
-    }
-
-    g_boot_splash_active = 1;
-    g_boot_splash_steps_total = total_steps;
-    g_boot_splash_steps_done = 0;
-    g_boot_splash_log_count = 0;
-    aster_memset(g_boot_splash_log, 0, sizeof(g_boot_splash_log));
-
-    display_set_color(0x0F, 0x00);
-    display_clear();
-
-    display_set_color(0x0F, 0x01);
-    display_write_at(6, 18, "+------------------------------------------+", 0x0F, 0x01);
-    display_write_at(7, 18, "|               ASTEROS CORE               |", 0x0F, 0x01);
-    display_write_at(8, 18, "|          booting user environment        |", 0x0F, 0x01);
-    display_write_at(9, 18, "+------------------------------------------+", 0x0F, 0x01);
-    display_set_color(0x0F, 0x00);
-
-    display_write_at(12, 20, "Loading modules...", 0x0F, 0x00);
-
-    for (i = 0; i < bar_w; ++i) {
-        bar[i] = '-';
-    }
-    bar[bar_w] = '\0';
-
-    display_write_at(18, 20, "[", 0x0E, 0x00);
-    display_write_at(18, 21, bar, 0x0A, 0x00);
-    display_write_at(18, 21 + bar_w, "]", 0x0E, 0x00);
-    display_write_at(19, 34, "0%", 0x0F, 0x00);
-
-    boot_splash_render_log();
-}
-
 static void boot_splash_update(const char *label, const char *state, u8 state_color) {
     const usize bar_w = 34;
     char bar[36];
@@ -437,22 +398,20 @@ static void boot_splash_update(const char *label, const char *state, u8 state_co
     display_write_at(19, 34, pct, 0x0F, 0x00);
 }
 
-static void boot_splash_end(void) {
-    g_boot_splash_active = 0;
-}
-
 static void boot_step_begin(const char *label) {
     if (g_boot_splash_active) {
         char log_line[56];
         usize p = 0;
-        p = append_text(log_line, p, sizeof(log_line), "[ ... ] ");
+        p = append_text(log_line, p, sizeof(log_line), "[ *** ] ");
         p = append_text(log_line, p, sizeof(log_line), label ? label : "unknown");
         log_line[p] = '\0';
         boot_splash_push_log(log_line);
         return;
     }
     display_set_color(0x0F, 0x00);
-    printk("[ ... ] %s", label);
+    printk("[ *** ] %s", label);
+
+    timer_sleep_ms(100);
 }
 
 static void boot_step_finish(const char *label, const char *state, u8 state_color) {
@@ -470,7 +429,7 @@ static void boot_step_finish(const char *label, const char *state, u8 state_colo
 }
 
 static void boot_step_ok(const char *label) {
-    boot_step_finish(label, "Uspesne", 0x0A);
+    boot_step_finish(label, "Okej", 0x0A);
 }
 
 static void boot_step_skip(const char *label) {
@@ -649,16 +608,16 @@ static int installer_detach_medium(void) {
 
 static void cmd_setup_install(void) {
     static const char readme[] =
-        "AsterOS base install\n"
+        "aster-core base install\n"
         "--------------------\n"
         "System byl nainstalovan prikazem setup.\n"
         "Pro napovedu pouzij: help\n"
-        "Aliasy upravis v: /.aliases\n";
+        "Aliasy upravis v: /.aliases pomoci edit /.aliases\n";
     static const char motd[] =
-        "Welcome to AsterOS core v0.1\n"
+        "Welcome to aster-core v0.1\n"
         "Type 'help' for commands.\n";
     static const char profile[] =
-        "echo Welcome in AsterOS\n";
+        "echo Welcome in aster-core\n";
     static const char installed[] =
         "installed=1\n";
     char setup_user[AUTH_NAME_LEN];
@@ -774,30 +733,10 @@ static void cmd_setup_install(void) {
     }
 }
 
-static void show_welcome_banner(void) {
-    display_set_color(0x0F, 0x01);
-    aster_print("\n");
-    aster_print("========================================\n");
-    aster_print("            ASTEROS KERNEL              \n");
-    aster_print("           Autor: Pavel Kalas           \n");
-    aster_print("                Rok: 2026               \n");
-    aster_print("========================================\n");
-    aster_print("\n");
-    display_set_color(0x0F, 0x00);
-}
-
 static void show_aster_banner(const char *subtitle) {
-    display_set_color(0x0F, 0x01);
+    display_set_color(0x08, 0x00);
-    aster_print("+------------------------------------------------+");
+    aster_print("[aster-core v0.11] Copyright (c) 2026 Pavel Kalas\n\n");
-    aster_print("\n");
+
-    aster_print("|                 AsterOS core v0.1              |");
-    aster_print("\n");
-    aster_print("|                author: Pavel Kalas             |");
-    aster_print("\n");
-    aster_print("|               text mode shell system           |");
-    aster_print("\n");
-    aster_print("+------------------------------------------------+");
-    aster_print("\n");
     display_set_color(0x0F, 0x00);
 
     if (subtitle && subtitle[0]) {
@@ -852,10 +791,8 @@ static const char g_help_lines[][80] = {
     "copfile src dst       - kopie souboru",
     "cat|read filename     - obsah souboru",
     "write filename text   - zapis textu",
-    "setup                 - instalace systemu na disk",
+    "install                 - instalace systemu na disk",
-    "asrun filename        - spustit AsterScript",
     "fm                    - file manager",
-    "./filename            - C-like script printf",
     "edit filename         - editor (Ctrl+S, ESC)",
     "calc A op B           - vypocet (+ - * /)",
     "tetris                - testovaci hra nad app API",
@@ -867,8 +804,7 @@ static const char g_help_lines[][80] = {
     "passwdch [user]       - zmeni heslo uzivatele",
     "exit                  - odhlaseni do loginu",
     "reboot                - restart systemu",
-    "shutdown|halt         - zastavit system",
+    "shutdown              - zastavit system",
-    "aliasy                - uprav v /.aliases"
 };
 
 static void shell_help_page(unsigned int page) {
@@ -1119,37 +1055,6 @@ static int auth_find_autologin_user(void) {
     return -1;
 }
 
-static void auth_first_setup_if_needed(void) {
-    char name[AUTH_NAME_LEN];
-    char pass[AUTH_PASS_LEN];
-
-    if (auth_load_users() == 0 && g_user_count > 0) {
-        return;
-    }
-
-    display_clear();
-    aster_print("=== First Start Setup ===\n");
-    aster_print("Vytvor prvniho uzivatele.\n");
-
-    for (;;) {
-        aster_print("Uzivatel: ");
-        auth_readline_plain(name, sizeof(name));
-        if (name[0] == '\0') {
-            print_error("Uzivatel nesmi byt prazdny");
-            continue;
-        }
-        break;
-    }
-
-    aster_print("Heslo (prazdne = auto-login): ");
-    auth_readline_secret(pass, sizeof(pass));
-
-    auth_clear_users();
-    if (auth_add_user(name, pass) != 0 || auth_save_users() != 0) {
-        print_error("Chyba ulozeni prvniho uzivatele");
-    }
-}
-
 static void auth_login_screen(void) {
     char name[AUTH_NAME_LEN];
     char pass[AUTH_PASS_LEN];
@@ -1249,49 +1154,6 @@ static char *next_token(char **cursor) {
     return start;
 }
 
-static unsigned long parse_u32(const char *s, int *ok) {
-    unsigned long value = 0;
-    *ok = 0;
-
-    if (!s || *s == '\0') {
-        return 0;
-    }
-
-    while (*s) {
-        if (*s < '0' || *s > '9') {
-            return 0;
-        }
-
-        value = value * 10UL + (unsigned long)(*s - '0');
-        ++s;
-    }
-
-    *ok = 1;
-    return value;
-}
-
-static long parse_i32(const char *s, int *ok) {
-    int sign = 1;
-    unsigned long v;
-
-    if (!s || *s == '\0') {
-        *ok = 0;
-        return 0;
-    }
-
-    if (*s == '-') {
-        sign = -1;
-        ++s;
-    }
-
-    v = parse_u32(s, ok);
-    if (!*ok) {
-        return 0;
-    }
-
-    return (long)v * (long)sign;
-}
-
 static void resolve_path(const char *name, char *out, usize out_size) {
     usize i = 0;
     usize j = 0;
@@ -1662,14 +1524,14 @@ static void fm_preview_file(const char *path) {
 static void fm_draw(const char *cwd, int selected, int top) {
     int i;
 
-    display_set_color(0x0E, 0x08);
+    display_set_color(0x0E, 0);
     display_clear();
-    display_set_color(0x07, 0x01);
+    display_set_color(0x07, 0);
-    printk(" ASTER FILE MANAGER | path: %s ", cwd);
+    printk(" File manager | path: %s ", cwd);
 
-    display_set_color(0x0E, 0x08);
+    display_set_color(0x0E, 0);
     aster_print("\n");
-    aster_print(" up/down=scroll, enter=open, e=edit, d=delete, backspace=up, q=quit \n\n");
+    aster_print(" Keymap: U/DOWN=scroll, ENTER=open, E=edit, D=delete, BACKSPACE=up, Q=quit \n\n");
 
     for (i = 0; i < FM_VIEW_ROWS; ++i) {
         int idx = top + i;
@@ -1735,12 +1597,9 @@ static void run_file_manager(void) {
     int last_selected = -1;
     int top = 0;
     unsigned long last_anim = timer_ticks();
-    unsigned long idle_spin = 0;
+    unsigned long tick_counter = 0;
-    unsigned long step_ticks = g_timer_hz / 5UL;
+    unsigned long step_ticks = 1;
-
+    unsigned long shift_interval = 10;
-    if (step_ticks == 0) {
-        step_ticks = 1;
-    }
 
     aster_memset(fm_cwd, 0, sizeof(fm_cwd));
     aster_memcpy(fm_cwd, g_cwd, aster_strlen(g_cwd));
@@ -1784,29 +1643,24 @@ static void run_file_manager(void) {
 
         for (;;) {
             unsigned long delta;
-            unsigned long steps;
             key = keyboard_try_read_key();
             now = timer_ticks();
 
+            // Timer-based posun - každých N tiků
             if (now > last_anim) {
                 delta = now - last_anim;
                 if (delta >= step_ticks) {
-                    steps = delta / step_ticks;
+                    tick_counter += delta;
-                    g_status_marquee_offset += (usize)steps;
+                    if (tick_counter >= shift_interval) {
-                    last_anim += steps * step_ticks;
+                        g_status_marquee_offset++;
+                        tick_counter = 0;
                         render_shell_statusbar();
                     }
+                    last_anim = now;
                 }
-
-            ++idle_spin;
-            if (idle_spin >= 230000UL) {
-                idle_spin = 0;
-                ++g_status_marquee_offset;
-                render_shell_statusbar();
             }
 
             if (key != -1) {
-                idle_spin = 0;
                 break;
             }
 
@@ -2162,7 +2016,7 @@ static void editor_redraw(const char *path, const char *buf, usize len, usize po
 
     display_set_color(0x0F, 0x00);
     display_clear();
-    display_set_color(0x0F, 0x01);
+    display_set_color(0x0F, 0x00);
     printk("EDITOR | file: %s | line: %u", path, (unsigned int)line);
     display_set_color(0x0F, 0x00);
     aster_print("\n\n");
@@ -2191,11 +2045,12 @@ static void shell_edit_file(const char *path) {
     usize len;
     usize pos;
     unsigned long last_anim = timer_ticks();
-    unsigned long idle_spin = 0;
+    unsigned long tick_counter = 0;
-    unsigned long step_ticks = g_timer_hz / 5UL;
+    unsigned long step_ticks = 1;
+    unsigned long shift_interval = 10;
     char title[120];
     usize tp = 0;
-    const char *prefix = "Upravovani souboru ";
+    const char *prefix = "* Upravovani souboru:";
     const char *base = path_basename(path);
     usize bi = 0;
 
@@ -2232,24 +2087,19 @@ static void shell_edit_file(const char *path) {
         int key;
         unsigned long now = timer_ticks();
         unsigned long delta;
-        unsigned long steps;
         key = keyboard_try_read_key();
 
         if (now > last_anim) {
             delta = now - last_anim;
             if (delta >= step_ticks) {
-                steps = delta / step_ticks;
+                tick_counter += delta;
-                g_status_marquee_offset += (usize)steps;
+                if (tick_counter >= shift_interval) {
-                last_anim += steps * step_ticks;
+                    g_status_marquee_offset++;
+                    tick_counter = 0;
                     render_shell_statusbar();
                 }
+                last_anim = now;
             }
-
-        ++idle_spin;
-        if (idle_spin >= 230000UL) {
-            idle_spin = 0;
-            ++g_status_marquee_offset;
-            render_shell_statusbar();
         }
 
         if (key == -1) {
@@ -2257,8 +2107,6 @@ static void shell_edit_file(const char *path) {
             continue;
         }
 
-        idle_spin = 0;
-
         if (key == 27) {
             g_status_marquee_only = 0;
             status_clear_left_hint();
@@ -2269,7 +2117,7 @@ static void shell_edit_file(const char *path) {
 
         if (key == 19) {
             (void)asterfs_write_file(path, (const u8 *)buf, (u16)len);
-            display_set_color(0x0A, 0x00);
+            display_set_color(0x0F, 0x00);
             aster_print("Saved\n");
             display_set_color(0x0F, 0x00);
             editor_redraw(path, buf, len, pos);
@@ -2533,14 +2381,6 @@ static void shell_processes(void) {
     }
 }
 
-static void demo_task_a(void) {
-    printk("[taskA] start\n");
-}
-
-static void demo_task_b(void) {
-    printk("[taskB] start\n");
-}
-
 static void shell_loop(void) {
     char line[128];
     char full[ASTERFS_NAME_LEN];
@@ -2586,7 +2426,7 @@ static void shell_loop(void) {
         } else if (aster_strcmp(exec_cmd, "helpall") == 0) {
             shell_help_all();
         } else if (aster_strcmp(exec_cmd, "info") == 0) {
-            printk("AsterOS Kernel | Autor: Pavel Kalas | Rok: 2026\n");
+            printk("aster-core | Autor: Pavel Kalas | Rok: 2026\n");
             printk("tick=%u\n", (unsigned int)timer_ticks());
         } else if (aster_strcmp(exec_cmd, "memory") == 0) {
             printk("total pages=%u free pages=%u\n", (unsigned int)memory_total_pages(), (unsigned int)memory_free_pages());
@@ -2701,18 +2541,6 @@ static void shell_loop(void) {
             }
 
             aster_print("OK\n");
-        } else if (aster_strcmp(exec_cmd, "makfile") == 0) {
-            arg1 = next_token(&cursor);
-            if (!arg1) {
-                print_error("Pouziti: makfile <filename>");
-            } else {
-                resolve_path(arg1, full, sizeof(full));
-                if (asterfs_create_file(full) == 0) {
-                    aster_print("OK\n");
-                } else {
-                    print_error("Chyba create file");
-                }
-            }
         } else if (aster_strcmp(exec_cmd, "remfile") == 0) {
             arg1 = next_token(&cursor);
             if (!arg1) {
@@ -2803,20 +2631,12 @@ static void shell_loop(void) {
                 }
             }
             print_exec_profile((const void *)asterfs_write_file, t0);
-        } else if (aster_strcmp(exec_cmd, "setup") == 0) {
+        } else if (aster_strcmp(exec_cmd, "install") == 0) {
             if (system_is_installed()) {
-                print_error("Neznamy prikaz. Zadej help.");
+                print_error("Neznamy prikaz. Zadej help.\n");
             } else {
                 cmd_setup_install();
             }
-        } else if (aster_strcmp(exec_cmd, "asrun") == 0) {
-            arg1 = next_token(&cursor);
-            if (!arg1) {
-                print_error("Pouziti: asrun <filename>");
-            } else {
-                resolve_path(arg1, full, sizeof(full));
-                run_aster_script(full);
-            }
         } else if (aster_strcmp(exec_cmd, "fm") == 0) {
             run_file_manager();
         } else if (aster_strcmp(exec_cmd, "edit") == 0) {
@@ -2827,60 +2647,6 @@ static void shell_loop(void) {
                 resolve_path(arg1, full, sizeof(full));
                 shell_edit_file(full);
             }
-        } else if (aster_strcmp(exec_cmd, "calc") == 0) {
-            int oka;
-            int okb;
-            long a;
-            long b;
-            long r = 0;
-            char op;
-            char *arg3;
-            unsigned long t0 = timer_ticks();
-            unsigned long calc_delta_ticks = 0;
-
-            arg1 = next_token(&cursor);
-            arg2 = next_token(&cursor);
-            arg3 = next_token(&cursor);
-
-            if (!arg1 || !arg2 || !arg3 || aster_strlen(arg2) != 1) {
-                print_error("Pouziti: calc <A> <op> <B>");
-            } else {
-                a = parse_i32(arg1, &oka);
-                b = parse_i32(arg3, &okb);
-                op = arg2[0];
-
-                if (!oka || !okb) {
-                    print_error("Chyba: A/B musi byt cisla");
-                } else {
-                    if (op == '+') r = a + b;
-                    else if (op == '-') r = a - b;
-                    else if (op == '*') r = a * b;
-                    else if (op == '/') {
-                        if (b == 0) {
-                            print_error("Chyba: deleni nulou");
-                            print_exec_profile((const void *)show_calc_ui, t0);
-                            continue;
-                        }
-                        r = a / b;
-                    } else {
-                        print_error("Operator musi byt + - * /");
-                        print_exec_profile((const void *)show_calc_ui, t0);
-                        continue;
-                    }
-
-                    calc_delta_ticks = timer_ticks() - t0;
-                    show_calc_ui(a, b, op, r);
-                }
-            }
-
-            if (calc_delta_ticks != 0) {
-                print_exec_profile_ticks((const void *)show_calc_ui, calc_delta_ticks);
-            } else {
-                print_exec_profile((const void *)show_calc_ui, t0);
-            }
-        } else if (aster_strcmp(exec_cmd, "tetris") == 0) {
-            app_tetris_main();
-            render_shell_statusbar();
         } else if (aster_strcmp(exec_cmd, "alloc") == 0) {
             int ok;
             unsigned long n;
@@ -2951,7 +2717,7 @@ static void shell_loop(void) {
         } else if (run_sysapp_by_name(exec_cmd) == 0) {
             continue;
         } else {
-            print_error("Neznamy prikaz. Zadej help.");
+            print_error("Neznamy prikaz. Zadej help.\n");
         }
     }
 }
@@ -3008,7 +2774,7 @@ void kmain(void) {
     boot_step_ok("Preruseni");
 
     aster_print("\nBoot sekvence dokoncena\n");
-    timer_sleep_ms(1500);
+    timer_sleep_ms(200);
 
     for (;;) {
         auth_login_screen();
@@ -3017,11 +2783,13 @@ void kmain(void) {
         if (system_is_installed()) {
             show_aster_banner("Shell");
         } else {
-            show_aster_banner("Live shell");
+            display_set_color(0x07, 0x00);
-            aster_print("Live mode: bez hesla\n");
+            aster_print("[aster-core v0.11] Copyright (c) 2026 Pavel Kalas\n\n");
-            aster_print("Pro instalaci na disk spust: setup\n");
+            display_set_color(0x0E, 0x00);
+            aster_print("Pro instalaci na disk spust prikaz: install\n");
+            display_set_color(0x0F, 0);
         }
-        aster_print("Pro zobrazeni prikazu pouzij 'help'\n");
+        aster_print("Pro zobrazeni prikazu pouzij 'help'\n\n");
         shell_loop();
     }
 }

kernel/string.c

@@ -13,6 +13,15 @@
 
 #include "string.h"
 
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+static inline int aster_isspace(char c) {
+    return (c == ' ' || c == '\t' || c == '\n' ||
+            c == '\r' || c == '\v' || c == '\f');
+}
+
 usize aster_strlen(const char *s) {
     usize n = 0;
     while (s && s[n]) {
@@ -63,3 +72,163 @@ void *aster_memset(void *dst, int v, usize n) {
 
     return dst;
 }
+
+char *aster_strcpy(char *dst, const char *src) {
+    char *d = dst;
+    while ((*d++ = *src++) != '\0')
+        ;
+    return dst;
+}
+
+char *aster_strstr(const char *haystack, const char *needle) {
+    if (!*needle)
+        return (char *)haystack;
+
+    while (*haystack) {
+        const char *h = haystack;
+        const char *n = needle;
+        while (*h && *n && (*h == *n)) {
+            ++h;
+            ++n;
+        }
+        if (!*n)
+            return (char *)haystack;
+        ++haystack;
+    }
+    return NULL;
+}
+
+char *aster_trim(char *str) {
+    if (!str)
+        return NULL;
+
+    while (*str && aster_isspace(*str))
+        ++str;
+
+    char *end = str;
+    while (*end)
+        ++end;
+    while (end > str && aster_isspace(*(end - 1)))
+        --end;
+    *end = '\0';
+
+    return str;
+}
+
+int aster_substring(char *dst, usize dstsize, const char *src,
+                    usize start, usize length) {
+    if (!dst || dstsize == 0 || !src)
+        return -1;
+
+    usize srclen = aster_strlen(src);
+    if (start >= srclen) {
+        dst[0] = '\0';
+        return 0;
+    }
+
+    usize max_copy = srclen - start;
+    if (length > max_copy)
+        length = max_copy;
+    if (length >= dstsize)
+        length = dstsize - 1;
+
+    for (usize i = 0; i < length; ++i)
+        dst[i] = src[start + i];
+    dst[length] = '\0';
+    return (int)length;
+}
+
+char *aster_remove(char *str, const char *substr) {
+    if (!str || !substr || !*substr)
+        return str;
+
+    usize sublen = aster_strlen(substr);
+    char *src = str;
+    char *dst = str;
+
+    while (*src) {
+        const char *s = src;
+        const char *sub = substr;
+        while (*s && *sub && (*s == *sub)) {
+            ++s;
+            ++sub;
+        }
+        if (!*sub) {
+            src += sublen;
+        } else {
+            *dst++ = *src++;
+        }
+    }
+    *dst = '\0';
+    return str;
+}
+
+int aster_split(char *str, const char *delim, char **tokens, usize max_tokens) {
+    if (!str || !delim || !*delim)
+        return -1;
+
+    usize delim_len = aster_strlen(delim);
+    int count = 0;
+    char *scan = str;
+
+    if (!tokens) {
+        if (*scan == '\0')
+            return 0;
+        while (*scan) {
+            if (count == 0) {
+                ++count;
+            }
+            char *found = aster_strstr(scan, delim);
+            if (found) {
+                ++count;
+                scan = found + delim_len;
+            } else {
+                break;
+            }
+        }
+        return count;
+    }
+
+    while (*scan && (usize)count < max_tokens) {
+        tokens[count++] = scan;
+        char *found = aster_strstr(scan, delim);
+        if (found) {
+            *found = '\0';
+            scan = found + delim_len;
+        } else {
+            break;
+        }
+    }
+
+    if (*scan && (usize)count < max_tokens) {
+        tokens[count++] = scan;
+    }
+
+    return count;
+}
+
+int aster_contains(const char *str, const char *substr) {
+    return aster_strstr(str, substr) != NULL;
+}
+
+int aster_starts_with(const char *str, const char *prefix) {
+    if (!str || !prefix)
+        return 0;
+    while (*prefix) {
+        if (*str != *prefix)
+            return 0;
+        ++str;
+        ++prefix;
+    }
+    return 1;
+}
+
+int aster_ends_with(const char *str, const char *suffix) {
+    if (!str || !suffix)
+        return 0;
+    usize str_len = aster_strlen(str);
+    usize suffix_len = aster_strlen(suffix);
+    if (suffix_len > str_len)
+        return 0;
+    return aster_strcmp(str + str_len - suffix_len, suffix) == 0;
+}

sysapps/helloworld.c

@@ -1,5 +1,13 @@
 #include "aster_api.h"
+#include "display.h"
+#include "printk.h"
 
 void init(void) {
-    aster_api_print("Hello, world!");
+    for (int col = 0x01; col <= 0x0F; col++) {
+        display_set_color(col, 0x00);
+        printk("Hello, world! (0x0%d)\n", col);
+    }
+
+    aster_api_print("\n");
+    display_set_color(0x0F, 0x00);
 }