terminal application with ipc, shift+pause state dumper, hello world for terminal, meminfo popup program

3 files changed, 294 insertions, 0 deletions

diff --git a/src/user/libterm/readline.c b/src/user/libterm/readline.c
new file mode 100644
index 0000000..b37801d
--- /dev/null
+++ b/src/user/libterm/readline.c
@@ -0,0 +1,106 @@
+#include <libterm/terminal.h>
+
+#include <knob/block.h>
+#include <knob/key.h>
+
+#include <stdint.h>
+
+//returns length of string without null terminator
+//max_length doesn't include null terminator
+uint32_t read_line(char *sz, uint32_t max_length, const char *prompt) {
+  term_add_sz(prompt);
+  term_add_char(' ');
+  term_paint();
+
+  uint32_t l = 0;
+  uint32_t c = 0;
+
+  while (1) {
+    struct key_packet kp = term_get_key_blocking();
+    switch (kp.key_id) {
+    case KEY_LEFT_ARROW:
+      if (c) {
+        --c;
+        term_cursor_left();
+        term_paint();
+      }
+      continue;
+    case KEY_RIGHT_ARROW:
+      if (c != l) {
+        ++c;
+        term_cursor_right();
+        term_paint();
+      }
+      continue;
+    case KEY_HOME:
+      while (c) {
+        --c;
+        term_cursor_left();
+      }
+      term_paint();
+      continue;
+    case KEY_END:
+      while (c != l) {
+        ++c;
+        term_cursor_right();
+      }
+      term_paint();
+      continue;
+    case KEY_DELETE:
+      if (c != l) {
+        ++c;
+        term_cursor_right();
+      }
+    case KEY_BSPACE:
+      if (!c)
+        continue;
+      --c;
+      --l;
+      for (uint32_t i = c; i < l; ++i)
+        sz[i] = sz[i + 1];
+      term_cursor_left();
+      term_add_sn_no_ww(sz + c, l - c);
+      term_add_char(' ');
+      for (uint32_t i = l + 1; i > c; --i)
+        term_cursor_left();
+      term_paint();
+      continue;
+    case KEY_ENTER:
+      while (c != l) {
+        ++c;
+        term_cursor_right();
+      }
+      sz[l] = '\0';
+      term_add_char('\n');
+      term_paint();
+      return l;
+    default:
+      if (l == max_length)
+        continue;
+      char ch = key_to_char(kp);
+      if (!ch)
+        continue;
+      if (c == l) {
+        ++l;
+        term_add_char(sz[c++] = ch);
+        term_paint();
+        continue;
+      }
+      if (!(kp.modifiers & INSERT)) {
+        term_add_char(sz[c++] = ch);
+        term_paint();
+        continue;
+      }
+      for (uint32_t i = l; i > c; --i)
+        sz[i] = sz[i - 1];
+      sz[c] = ch;
+      ++l;
+      term_add_sn_no_ww(sz + c, l - c);
+      ++c;
+      for (uint32_t i = l; i > c; --i)
+        term_cursor_left();
+      term_paint();
+      continue;
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/user/libterm/terminal.c b/src/user/libterm/terminal.c
new file mode 100644
index 0000000..387d63f
--- /dev/null
+++ b/src/user/libterm/terminal.c
@@ -0,0 +1,179 @@
+#include <libterm/command.h>
+
+#include <knob/format.h>
+#include <knob/block.h>
+#include <knob/ipc.h>
+
+_task_handle_t term_task;
+
+void term_set_dimensions(uint32_t width, uint32_t height) {
+  struct terminal_command cmd = {
+    .kind = SET_DIMENSIONS,
+    .as_coords = {
+      .x = width,
+      .y = height
+    }
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_get_dimensions(uint32_t *width, uint32_t *height) {
+  struct terminal_command cmd = {
+    .kind = GET_DIMENSIONS
+  };
+
+  if (try_send_command(&cmd)) {
+    union terminal_response rs;
+    if (try_get_response(&rs)) {
+      *width = rs.as_coords.x;
+      *height = rs.as_coords.y;
+    }
+  }
+}
+
+void term_paint() {
+  struct terminal_command cmd = {
+    .kind = PAINT
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_clear() {
+  struct terminal_command cmd = {
+    .kind = CLEAR
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_set_color(uint8_t fg, uint8_t bg) {
+  struct terminal_command cmd = {
+    .kind = SET_COLOR,
+    .as_color = {
+      .fg = fg,
+      .bg = bg
+    }
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_set_cursor(uint32_t new_y, uint32_t new_x) {
+  struct terminal_command cmd = {
+    .kind = SET_CURSOR,
+    .as_coords = {
+      .y = new_y,
+      .x = new_x
+    }
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_cursor_left() {
+  struct terminal_command cmd = {
+    .kind = CURSOR_LEFT
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_cursor_right() {
+  struct terminal_command cmd = {
+    .kind = CURSOR_RIGHT
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_cursor_up() {
+  struct terminal_command cmd = {
+    .kind = CURSOR_UP
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_cursor_down() {
+  struct terminal_command cmd = {
+    .kind = CURSOR_DOWN
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_add_char(char ch) {
+  struct terminal_command cmd = {
+    .kind = ADD_CHAR,
+    .as_char = ch
+  };
+
+  try_send_command(&cmd);
+}
+
+void term_add_sn_no_ww(const char *s, uint32_t n) {
+  struct terminal_command cmd = {
+    .kind = ADD_SN_NO_WORDWRAP,
+    .as_uint = n
+  };
+
+  if (try_send_command(&cmd))
+    try_send_ipc(term_task, s, n);
+}
+
+void term_add_sz_no_ww(const char *sz) {
+  term_add_sn_no_ww(sz, strlen(sz));
+}
+
+void term_add_sz(const char *sz) {
+  const uint32_t len = strlen(sz);
+
+  struct terminal_command cmd = {
+    .kind = ADD_SN,
+    .as_uint = len
+  };
+
+  if (try_send_command(&cmd))
+    try_send_ipc(term_task, sz, len);
+}
+
+void term_addf_no_ww_v(const char *fmt, va_list args) {
+  char *const msg = format_v(fmt, args);
+  term_add_sz_no_ww(msg);
+  free_block(msg);
+}
+
+void term_addf_no_ww(const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  term_addf_no_ww_v(fmt, args);
+  va_end(args);
+}
+
+void term_addf_v(const char *fmt, va_list args) {
+  char *const msg = format_v(fmt, args);
+  term_add_sz(msg);
+  free_block(msg);
+}
+
+void term_addf(const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  term_addf_v(fmt, args);
+  va_end(args);
+}
+
+struct key_packet term_get_key_blocking() {
+  struct terminal_command cmd = {
+    .kind = GET_KEY
+  };
+
+  try_send_command(&cmd);
+
+  union terminal_response rs;
+  try_get_response(&rs);
+
+  return rs.as_key;
+}
diff --git a/src/user/libterm/termtask.c b/src/user/libterm/termtask.c
new file mode 100644
index 0000000..cc853a6
--- /dev/null
+++ b/src/user/libterm/termtask.c
@@ -0,0 +1,9 @@
+#include <libterm/command.h>
+
+#include <pland/pcrt.h>
+
+void set_term_task_to_stdio() {
+  term_task = stdio_task;
+}
+
+BEFORE_MAIN(set_term_task_to_stdio);
\ No newline at end of file