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-rw-r--r--gpxe/src/core/ansiesc.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/gpxe/src/core/ansiesc.c b/gpxe/src/core/ansiesc.c
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--- a/gpxe/src/core/ansiesc.c
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@@ -1,116 +0,0 @@
-/*
- * 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.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <string.h>
-#include <assert.h>
-#include <gpxe/ansiesc.h>
-
-/** @file
- *
- * ANSI escape sequences
- *
- */
-
-/**
- * Call ANSI escape sequence handler
- *
- * @v handlers List of escape sequence handlers
- * @v function Control function identifier
- * @v count Parameter count
- * @v params Parameter list
- */
-static void ansiesc_call_handler ( struct ansiesc_handler *handlers,
- unsigned int function, int count,
- int params[] ) {
- struct ansiesc_handler *handler;
-
- for ( handler = handlers ; handler->function ; handler++ ) {
- if ( handler->function == function ) {
- handler->handle ( count, params );
- break;
- }
- }
-}
-
-/**
- * Process character that may be part of ANSI escape sequence
- *
- * @v ctx ANSI escape sequence context
- * @v c Character
- * @ret c Original character if not part of escape sequence
- * @ret <0 Character was part of escape sequence
- *
- * ANSI escape sequences will be plucked out of the character stream
- * and interpreted; once complete they will be passed to the
- * appropriate handler if one exists in this ANSI escape sequence
- * context.
- *
- * In the interests of code size, we are rather liberal about the
- * sequences we are prepared to accept as valid.
- */
-int ansiesc_process ( struct ansiesc_context *ctx, int c ) {
- if ( ctx->count == 0 ) {
- if ( c == ESC ) {
- /* First byte of CSI : begin escape sequence */
- ctx->count = 1;
- memset ( ctx->params, 0xff, sizeof ( ctx->params ) );
- ctx->function = 0;
- return -1;
- } else {
- /* Normal character */
- return c;
- }
- } else {
- if ( c == '[' ) {
- /* Second byte of CSI : do nothing */
- } else if ( ( c >= '0' ) && ( c <= '9' ) ) {
- /* Parameter Byte : part of a parameter value */
- int *param = &ctx->params[ctx->count - 1];
- if ( *param < 0 )
- *param = 0;
- *param = ( ( *param * 10 ) + ( c - '0' ) );
- } else if ( c == ';' ) {
- /* Parameter Byte : parameter delimiter */
- ctx->count++;
- if ( ctx->count > ( sizeof ( ctx->params ) /
- sizeof ( ctx->params[0] ) ) ) {
- /* Excessive parameters : abort sequence */
- ctx->count = 0;
- DBG ( "Too many parameters in ANSI escape "
- "sequence\n" );
- }
- } else if ( ( c >= 0x20 ) && ( c <= 0x2f ) ) {
- /* Intermediate Byte */
- ctx->function <<= 8;
- ctx->function |= c;
- } else {
- /* Treat as Final Byte. Zero ctx->count before
- * calling handler to avoid potential infinite loops.
- */
- int count = ctx->count;
- ctx->count = 0;
- ctx->function <<= 8;
- ctx->function |= c;
- ansiesc_call_handler ( ctx->handlers, ctx->function,
- count, ctx->params );
- }
- return -1;
- }
-}