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feat(rust,gui): RLE compression codec + Rust Lab desktop app
Rust kernel expansion: - rust/src/compress/mod.rs (new): memory-safe PackBits-style run-length encoding codec (rle_compress / rle_decompress) with C-ABI shims, registered in lib.rs. C fallbacks added to rust_fallback.c so aarch64/armv8i match. - include/kernel/rust.h: FFI declarations for the codec. - LazyBox: new `rle <text>` applet that compresses, decompresses, prints the ratio and verifies the round-trip is lossless. GUI expansion: - gui/gui_apps.c: "Rust Lab" app -- a live dashboard for the Rust subsystem. Shows CRC-32C/Adler-32 of a sample, measured ChaCha20/SHA3-256/AES-128 throughput as scaled bars plus a composite score (benchmark run once at launch and cached), and a live ChaCha20 CSPRNG byte stream refreshed periodically. Per-window state freed on close. - Registered "Rust Lab" (info icon) in the desktop app table and on the desktop; desktop icon indices updated for the new entry. Verified: clean build on x86_64/aarch64/armv8i; boots through the SUB login to the desktop with the new Rust Lab icon rendering (screenshotted); checksum self-test prints, 0 panics / 0 OOM. Co-Authored-By: Claude Opus 4.8 <[email protected]> Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
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subhobhai943andClaude Opus 4.8 committed
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+103
@@ -546,3 +546,106 @@ void gui_app_life_launch(int x, int y, int w, int h) {
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win->handle_event = life_event;
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}
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}
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// =================================================================
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// 8. Rust Kernel Lab -- showcases the memory-safe Rust subsystem
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// =================================================================
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typedef struct {
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rust_crypto_bench_result_t bench; // measured once at launch
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bool have_bench;
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uint32_t frame;
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uint8_t entropy[8]; // live CSPRNG sample
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} rustlab_data_t;
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static void rustlab_bar(int x, int y, int w, const char* label, uint32_t value,
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uint32_t max_value, uint32_t color) {
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char buf[48];
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gui_gfx_draw_string(x, y, label, GUI_THEME_TEXT_MAIN);
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int bx = x + 96;
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int bw = w - 96 - 64;
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if (bw < 20) bw = 20;
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gui_gfx_fill_rect(bx, y, bw, 10, GUI_THEME_BG_DARK);
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uint32_t denom = (max_value > 0) ? max_value : 1;
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int fill = (int)(((uint64_t)value * (uint64_t)bw) / denom);
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if (fill > bw) fill = bw;
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gui_gfx_fill_rect(bx, y, fill, 10, color);
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gui_gfx_draw_rect(bx, y, bw, 10, GUI_THEME_BORDER);
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snprintf(buf, sizeof(buf), "%u MB/s", value);
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gui_gfx_draw_string(bx + bw + 6, y, buf, GUI_THEME_TEXT_MUTED);
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}
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static void rustlab_paint(gui_window_t* win) {
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rustlab_data_t* rd = (rustlab_data_t*)win->user_data;
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if (!rd) return;
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int cx = win->x + 14;
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int cy = win->y + GUI_TITLEBAR_HEIGHT + 12;
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int w = win->width - 28;
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gui_gfx_draw_string_16_shadow(cx, cy, "Rust Kernel Subsystem (no_std)", GUI_THEME_PRIMARY, GUI_COLOR_BLACK);
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cy += 26;
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// Checksum engine (recomputed live -- it is cheap)
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static const char sample[] = "SUB-OS";
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uint32_t crc = rust_crc32c((const uint8_t*)sample, 6);
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uint32_t adl = rust_adler32((const uint8_t*)sample, 6);
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char buf[80];
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gui_gfx_draw_string(cx, cy, "Checksums of \"SUB-OS\":", GUI_THEME_SUCCESS);
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cy += 14;
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snprintf(buf, sizeof(buf), "CRC-32C 0x%08X Adler-32 0x%08X", crc, adl);
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gui_gfx_draw_string(cx + 8, cy, buf, GUI_THEME_TEXT_MUTED);
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cy += 22;
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// Crypto benchmark bars (measured once at launch)
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gui_gfx_draw_string(cx, cy, "Crypto throughput (measured):", GUI_THEME_SUCCESS);
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cy += 16;
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if (rd->have_bench) {
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uint32_t mx = rd->bench.chacha20_mbs;
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if (rd->bench.sha3_256_mbs > mx) mx = rd->bench.sha3_256_mbs;
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if (rd->bench.aes128_mbs > mx) mx = rd->bench.aes128_mbs;
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rustlab_bar(cx + 4, cy, w, "ChaCha20", rd->bench.chacha20_mbs, mx, GUI_THEME_ACCENT);
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cy += 16;
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rustlab_bar(cx + 4, cy, w, "SHA3-256", rd->bench.sha3_256_mbs, mx, GUI_THEME_SUCCESS);
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cy += 16;
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rustlab_bar(cx + 4, cy, w, "AES-128", rd->bench.aes128_mbs, mx, GUI_THEME_WARNING);
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cy += 16;
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snprintf(buf, sizeof(buf), "Composite score: %u", rd->bench.score);
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gui_gfx_draw_string(cx + 4, cy, buf, GUI_THEME_TEXT_DIM);
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cy += 22;
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} else {
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gui_gfx_draw_string(cx + 4, cy, "benchmark unavailable", GUI_THEME_TEXT_DIM);
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cy += 22;
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}
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// Live CSPRNG entropy, refreshed periodically
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if ((rd->frame++ % 20) == 0) {
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rust_csprng_get_random(rd->entropy, sizeof(rd->entropy));
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}
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gui_gfx_draw_string(cx, cy, "ChaCha20 CSPRNG stream:", GUI_THEME_SUCCESS);
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cy += 14;
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snprintf(buf, sizeof(buf), "%02X %02X %02X %02X %02X %02X %02X %02X",
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rd->entropy[0], rd->entropy[1], rd->entropy[2], rd->entropy[3],
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rd->entropy[4], rd->entropy[5], rd->entropy[6], rd->entropy[7]);
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gui_gfx_draw_string(cx + 8, cy, buf, GUI_THEME_PRIMARY);
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}
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static void rustlab_event(gui_window_t* win, const gui_event_t* ev) {
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if (ev->type == GUI_EVENT_CLOSE && win->user_data) {
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kfree(win->user_data);
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win->user_data = NULL;
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}
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}
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void gui_app_rustlab_launch(int x, int y, int w, int h) {
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gui_window_t* win = gui_wm_create_window("Rust Lab", x, y, (w > 0) ? w : 420, (h > 0) ? h : 300);
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if (win) {
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rustlab_data_t* rd = (rustlab_data_t*)kzalloc(sizeof(rustlab_data_t));
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if (rd) {
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rd->have_bench = (rust_crypto_run_benchmark(&rd->bench) == 0);
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rust_csprng_get_random(rd->entropy, sizeof(rd->entropy));
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}
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win->user_data = rd;
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win->paint = rustlab_paint;
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win->handle_event = rustlab_event;
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}
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}
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+4
-2
@@ -57,6 +57,7 @@ static const desktop_app_t g_apps[] = {
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{ "Calculator", GUI_ICON_CALC, gui_app_calc_launch, 260, 100, 220, 240 },
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{ "Paint", GUI_ICON_PAINT, gui_app_paint_launch, 200, 60, 360, 260 },
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{ "Life", GUI_ICON_FLASK, gui_app_life_launch, 240, 70, 480, 380 },
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{ "Rust Lab", GUI_ICON_INFO, gui_app_rustlab_launch, 300, 80, 420, 300 },
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{ "Clock", GUI_ICON_CLOCK, gui_app_clock_launch, 460, 120, 280, 260 },
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{ "Settings", GUI_ICON_SETTINGS, gui_app_settings_launch, 160, 60, 400, 320 },
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{ "About", GUI_ICON_INFO, gui_app_about_launch, 240, 140, 330, 170 },
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@@ -64,8 +65,9 @@ static const desktop_app_t g_apps[] = {
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#define APP_COUNT ((int)(sizeof(g_apps) / sizeof(g_apps[0])))
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// Which of the above appear on the desktop itself.
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// Indices into g_apps[]: Terminal, Files, Monitor, Kernel Log, KTest, Life, Settings.
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static const int g_desktop_icons[] = { 0, 1, 2, 4, 5, 9, 11 };
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// Indices into g_apps[]: Terminal, Files, Monitor, Kernel Log, KTest, Life,
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// Rust Lab, Settings.
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static const int g_desktop_icons[] = { 0, 1, 2, 4, 5, 9, 10, 12 };
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#define DESKTOP_ICON_COUNT ((int)(sizeof(g_desktop_icons) / sizeof(g_desktop_icons[0])))
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static bool g_start_menu_open = false;
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