Skeletal (non-echoing) version of readline()

src/hci/readline.c

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <string.h>
+#include <malloc.h>
+#include <console.h>
+#include <gpxe/editstring.h>
+#include <readline/readline.h>
+
+/** @file
+ *
+ * Minimal readline
+ *
+ */
+
+#define READLINE_MAX 256
+
+/**
+ * Read line from console
+ *
+ * @v prompt		Prompt string
+ * @ret line		Line read from console (excluding terminating newline)
+ *
+ * The returned line is allocated with malloc(); the caller must
+ * eventually call free() to release the storage.
+ */
+char * readline ( const char *prompt ) {
+	char buf[READLINE_MAX];
+	struct edit_string string = {
+		.buf = buf,
+		.len = sizeof ( buf ),
+		.cursor = 0,
+	};
+	int key;
+
+	if ( prompt )
+		printf ( "%s", prompt );
+
+	buf[0] = '\0';
+	while ( 1 ) {
+		key = edit_string ( &string, getchar() );
+		switch ( key ) {
+		case 0x0d: /* Carriage return */
+		case 0x0a: /* Line feed */
+			return ( strdup ( buf ) );
+		case 0x03: /* Ctrl-C */
+			return NULL;
+		default:
+			/* Do nothing */
+			break;
+		}
+	}
+}

src/include/readline/readline.h

@@ -0,0 +1,12 @@
+#ifndef _READLINE_H
+#define _READLINE_H
+
+/** @file
+ *
+ * Minmal readline
+ *
+ */
+
+extern char * readline ( const char *prompt );
+
+#endif /* _READLINE_H */