feat(kernel): add a clear command

bemxio · Jul 16, 2022 · 07af204 · 07af204
1 parent c7669de
commit 07af204
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Showing 3 changed files with 11 additions and 3 deletions.
diff --git a/kernel/commands.c b/kernel/commands.c
@@ -3,10 +3,16 @@
 
 void help(struct tokenized_string *tokens) {
     kprintln("All of the commands:");
+
     kprintln("`help` - shows this list");
     kprintln("`echo` - prints the first argument that is provided");
+    kprintln("`clear` - clears the screen");
 }
 
 void echo(struct tokenized_string *tokens) {
     kprintln(tokens->indices[1]);
+}
+
+void clear(struct tokenized_string *tokens) {
+    kclear();
 }
diff --git a/kernel/commands.h b/kernel/commands.h
@@ -5,5 +5,6 @@
 
 void help(struct tokenized_string *tokens);
 void echo(struct tokenized_string *tokens);
+void clear(struct tokenized_string *tokens);
 
 #endif
diff --git a/kernel/kernel.c b/kernel/kernel.c
@@ -7,10 +7,11 @@
 #include "commands.h"
 #include "parser.h"
 
+#define FUNC_AMOUNT 3
 #define PROMPT "$ "
 
-char **names[2] = {"help", "echo"};
-int (*addresses[2])(struct tokenized_string *) = {&help, &echo};
+char **names[FUNC_AMOUNT] = {"help", "echo", "clear"};
+int (*addresses[FUNC_AMOUNT])(struct tokenized_string *) = {&help, &echo, &clear};
 
 void command_error(char *exception) {
     kprint("error: ");
@@ -21,7 +22,7 @@ void input_callback(char *buffer) {
     struct tokenized_string *tokens = tokenize_string(buffer);
     char *name = tokens->indices[0]; // the command name
 
-    int index = findsubstr(names, name, 2);
+    int index = findsubstr(names, name, FUNC_AMOUNT);
 
     if (index == -1) { // command name not found
         command_error("command not found");