Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / core / lineconsole.c

diff --git a/qemu/roms/ipxe/src/core/lineconsole.c b/qemu/roms/ipxe/src/core/lineconsole.c
new file mode 100644 (file)
index 0000000..1b6791c
--- /dev/null
+++ b/qemu/roms/ipxe/src/core/lineconsole.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2012 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * Line-based console
+ *
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <ipxe/ansiesc.h>
+#include <ipxe/lineconsole.h>
+
+/**
+ * Print a character to a line-based console
+ *
+ * @v character                Character to be printed
+ * @ret print          Print line
+ */
+size_t line_putchar ( struct line_console *line, int character ) {
+
+       /* Strip ANSI escape sequences */
+       character = ansiesc_process ( &line->ctx, character );
+       if ( character < 0 )
+               return 0;
+
+       /* Ignore carriage return */
+       if ( character == '\r' )
+               return 0;
+
+       /* Treat newline as a terminator */
+       if ( character == '\n' )
+               character = 0;
+
+       /* Add character to buffer */
+       line->buffer[line->index++] = character;
+
+       /* Do nothing more unless we reach end-of-line (or end-of-buffer) */
+       if ( ( character != 0 ) &&
+            ( line->index < ( line->len - 1 /* NUL */ ) ) ) {
+               return 0;
+       }
+
+       /* Reset to start of buffer */
+       line->index = 0;
+
+       return 1;
+}