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author | Michael Brown | 2012-02-28 23:45:32 +0100 |
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committer | Michael Brown | 2012-02-29 00:10:01 +0100 |
commit | 851b93fbc3d5d28851963bd412eb321742c5437f (patch) | |
tree | 1cd89da57441bb3808560424008a85187d98d716 /src/core/lineconsole.c | |
parent | [syslog] Disable console when no syslog server is defined (diff) | |
download | ipxe-851b93fbc3d5d28851963bd412eb321742c5437f.tar.gz ipxe-851b93fbc3d5d28851963bd412eb321742c5437f.tar.xz ipxe-851b93fbc3d5d28851963bd412eb321742c5437f.zip |
[syslog] Separate out generic line-based console functionality
Abstract out the generic line-handling portions of the syslog
putchar() routine, to allow use by other console types.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/core/lineconsole.c')
-rw-r--r-- | src/core/lineconsole.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/core/lineconsole.c b/src/core/lineconsole.c new file mode 100644 index 00000000..c43a2875 --- /dev/null +++ b/src/core/lineconsole.c @@ -0,0 +1,76 @@ +/* + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** @file + * + * Line-based console + * + */ + +#include <stdint.h> +#include <stddef.h> +#include <ipxe/ansiesc.h> +#include <ipxe/lineconsole.h> + +/** Line-based console ANSI escape sequence handlers */ +static struct ansiesc_handler line_ansiesc_handlers[] = { + { 0, NULL } +}; + +/** Line-based console ANSI escape sequence context */ +static struct ansiesc_context line_ansiesc_ctx = { + .handlers = line_ansiesc_handlers, +}; + +/** + * 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_ansiesc_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; +} |