1 files changed, 55 insertions, 0 deletions
diff --git a/client/rl.c b/client/rl.c
new file mode 100644
index 0000000..fb26057
--- /dev/null
+++ b/client/rl.c
@@ -0,0 +1,55 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdarg.h>
+
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include "rl.h"
+
+void rl_printf(const char *fmt, ...) {
+	// save line
+	char* saved_line = rl_copy_text(0, rl_end);
+	int saved_point = rl_point;
+	int saved_end = rl_end;
+	
+	// clear line
+	rl_save_prompt();
+	rl_replace_line("", 0);
+	rl_redisplay();
+
+	// printf
+	va_list args;
+	va_start(args, fmt);
+	vprintf(fmt, args);
+	va_end(args);
+
+	// restore line
+	rl_restore_prompt();
+	rl_replace_line(saved_line, 0);
+	rl_point = saved_point;
+	rl_end = saved_end;
+	rl_redisplay();
+
+	free(saved_line);
+}
+
+int cli_main() {
+	char* input = NULL;
+	while (1) {
+		if (input != NULL) free(input);
+		input = readline(CLI_PROMPT);
+
+		// exit on ^D or ^C (EOF)
+		if (input == NULL) return EXIT_SUCCESS;
+
+		// add non-empty line to history
+		if (*input) add_history(input);
+
+		if (strcmp(input, "exit") == 0) return EXIT_SUCCESS;
+	}	
+
+	return EXIT_SUCCESS;
+}
+