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Skeletal (non-echoing) version of readline()

tags/v0.9.3
Michael Brown 17 år sedan
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2 ändrade filer med 80 tillägg och 0 borttagningar
  1. 68
    0
      src/hci/readline.c
  2. 12
    0
      src/include/readline/readline.h

+ 68
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src/hci/readline.c Visa fil

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

+ 12
- 0
src/include/readline/readline.h Visa fil

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+#ifndef _READLINE_H
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+#define _READLINE_H
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+
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+/** @file
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+ *
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+ * Minmal readline
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+ *
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+ */
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+
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+extern char * readline ( const char *prompt );
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+
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+#endif /* _READLINE_H */

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