dynamic volume changes for graph replacement

Signed-off-by: Anand V. Avati <avati@blackhole.gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 971 (dynamic volume management)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971

1 files changed, 87 insertions, 0 deletions

diff --git a/libglusterfs/src/graph.l b/libglusterfs/src/graph.l
new file mode 100644
index 000000000..8d9d2dc36
--- /dev/null
+++ b/libglusterfs/src/graph.l
@@ -0,0 +1,87 @@
+/*
+   Copyright (c) 2006-2009 Gluster, Inc. <http://www.gluster.com>
+   This file is part of GlusterFS.
+
+   GlusterFS 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 3 of the License,
+   or (at your option) any later version.
+
+   GlusterFS 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, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+
+%x STRING
+%option yylineno
+%option noinput
+%{
+
+#define YYSTYPE char *
+#include "xlator.h"
+#include "y.tab.h"
+#include <string.h>
+#define START_STRSIZE	32
+
+static char *text;
+static int text_asize;
+static int text_size;
+
+void append_string(const char *str, int size)
+{
+	int new_size = text_size + size + 1;
+	if (new_size > text_asize) {
+		new_size += START_STRSIZE - 1;
+		new_size &= -START_STRSIZE;
+                if (!text) {
+                        text = GF_CALLOC (1, new_size,
+                                          gf_common_mt_char);
+                } else {
+                        text = GF_REALLOC (text, new_size);
+                }
+                if (!text)
+                        gf_log ("parser", GF_LOG_ERROR,
+                                "out of memory");
+		text_asize = new_size;
+	}
+	memcpy(text + text_size, str, size);
+	text_size += size;
+	text[text_size] = 0;
+}
+
+%}
+
+VOLUME [v][o][l][u][m][e]
+END    [e][n][d]
+SUB    [s][u][b]
+OPTION [o][p][t][i][o][n]
+TYPE   [t][y][p][e]
+%%
+\#.*                   ;
+{VOLUME}               return VOLUME_BEGIN;
+{TYPE}                 return TYPE;
+{END}[-]{VOLUME}       return VOLUME_END;
+{SUB}{VOLUME}[Ss]      return SUBVOLUME;
+{OPTION}               return OPTION;
+\"                     BEGIN(STRING);
+<STRING>{
+       [^\n\"\\]* {    append_string (yytext, yyleng); }
+       \\.        {    append_string (yytext + 1, yyleng - 1); }
+       \"         {
+                       if (0) {
+                              yyunput (0, NULL);
+                       }
+                       BEGIN (INITIAL);
+                       yylval = text;
+                       return STRING_TOK;
+       }
+}
+[^ \t\r\n\"\\]+ {    yylval = gf_strdup (yytext) ; return ID; }
+[ \t\r\n]+             ;
+%%