reorganization: first steps

1 files changed, 72 insertions, 0 deletions

diff --git a/src/cmd/vterm/vterm.c b/src/cmd/vterm/vterm.c
new file mode 100644
index 0000000..f365f6b
--- /dev/null
+++ b/src/cmd/vterm/vterm.c
@@ -0,0 +1,72 @@
+#include "vterm.h"
+#include <camellia/syscalls.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <camellia/compat.h>
+
+struct point cursor = {0};
+
+void in_char(char c) {
+	switch (c) {
+		case '\n':
+			cursor.x = 0;
+			cursor.y++;
+			break;
+		case '\b':
+			if (cursor.x > 0) cursor.x--;
+			break;
+		case '\t':
+			/* rounds down to nearest multiple of 8 and adds 8
+			   = adding 1 and rounding up to the nearest multiple of 8 */
+			cursor.x = (cursor.x & ~7) + 8;
+			break;
+		default:
+			font_blit(c, cursor.x, cursor.y);
+			cursor.x++;
+	}
+
+	if (cursor.x * font.w >= fb.width) {
+		cursor.x = 0;
+		cursor.y++;
+	}
+	while ((cursor.y + 1) * font.h >= fb.height) scroll();
+}
+
+int main(void) {
+	if (fb_setup(&fb, "/kdev/video/") < 0) {
+		eprintf("fb_setup error");
+		return 1;
+	}
+	font_load("/init/usr/share/fonts/spleen/spleen-8x16.psfu");
+
+	static char buf[512];
+	struct ufs_request res;
+	while (!c0_fs_wait(buf, sizeof buf, &res)) {
+		switch (res.op) {
+			case VFSOP_OPEN:
+				// TODO check path
+				c0_fs_respond(NULL, 0, 0);
+				break;
+
+			case VFSOP_WRITE:
+				if (res.flags) {
+					c0_fs_respond(NULL, -1, 0);
+				} else {
+					for (size_t i = 0; i < res.len; i++)
+						in_char(buf[i]);
+					dirty_flush(&dirty, &fb);
+					c0_fs_respond(NULL, res.len, 0);
+				}
+				break;
+
+			default:
+				c0_fs_respond(NULL, -1, 0);
+				break;
+		}
+	}
+
+	return 1;
+}