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authorBent Bisballe Nyeng <deva@aasimon.org>2012-12-07 14:50:07 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2012-12-07 14:50:07 +0100
commit26b8b48b4952249a13855a21946955a10c77837f (patch)
treed5b07924fa90e75784ebb29afa1eeca6473ce697 /debug_filter.c
parente8f12bfd6d9fa3e813c3f8d4f6102a6b1c7037ab (diff)
Add filter functionality.
Diffstat (limited to 'debug_filter.c')
-rw-r--r--debug_filter.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/debug_filter.c b/debug_filter.c
new file mode 100644
index 0000000..f93b4c9
--- /dev/null
+++ b/debug_filter.c
@@ -0,0 +1,123 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ * debug_filter.c
+ *
+ * Fri Dec 7 14:24:27 CET 2012
+ * Copyright 2012 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of Debug Module.
+ *
+ * Debug Module 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
+ * (at your option) any later version.
+ *
+ * Debug Module 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 Debug Module; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include "debug_filter.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#define NELEM(x) (sizeof(x)/sizeof((x)[0]))
+struct __debug_channel
+{
+ char name[32];
+ unsigned flags;
+};
+
+#define __DEBUG_CHANNEL_MAX 256
+
+static struct __debug_channel debug_channel[__DEBUG_CHANNEL_MAX];
+static unsigned n_debug_channel = 0;
+static unsigned debug_flags = (1 << __class_err) | (1 << __class_fixme);
+
+int dbg_filter_enabled(const enum __debug_class cl, const char *ch)
+{
+ unsigned i;
+ for(i = 0; i < n_debug_channel; i++) {
+ if(!strcmp(ch, debug_channel[i].name)) {
+ return (debug_channel[i].flags & (1 << cl)) != 0;
+ }
+ }
+ return debug_flags & (1 << cl);
+}
+
+extern const char * const *debug_class_str;
+
+/*
+ * fmt := [set[,set]*]*
+ * set := [+-]channel
+ * | class[+-]channel
+ * | [+-]all
+ */
+int dbg_filter_parse(const char *filter)
+{
+ char *s;
+ char *next;
+ char *opt;
+
+ if(!(s = strdup(filter))) return 1;
+
+ for(opt = s; opt; opt = next) {
+ int set = 0;
+ int clr = 0;
+ unsigned i;
+ if((next = strchr(opt, ','))) *next++ = '\0';
+ char *p = opt + strcspn(opt, "+-");
+ if(!*p) p = opt; // All chars -> a channel name
+ if(p > opt) {
+ // we have a class
+ for(i = 0; i < NELEM(debug_class_str); i++) {
+ int n = strlen(debug_class_str[i]);
+ if(n != (p - opt)) continue;
+ if(!memcmp(opt, debug_class_str[i], n)) {
+ // Found the class
+ if(*p == '+')
+ set = 1 << i;
+ else
+ clr = 1 << i;
+ break;
+ }
+ }
+ if(i == NELEM(debug_class_str)) continue;
+ } else {
+ if(*p == '-')
+ clr = ~0;
+ else
+ set = ~0;
+ }
+ if(*p == '+' || *p == '-') p++;
+ if(!*p) continue;
+ if(!strcmp("all", p)) {
+ debug_flags = (debug_flags & ~clr) | set;
+ } else {
+ if(strlen(p) >= sizeof(debug_channel[0].name)) continue;
+ for(i = 0; i < n_debug_channel; i++) {
+ if(!strcmp(p, debug_channel[i].name)) {
+ debug_channel[i].flags = (debug_channel[i].flags & ~clr) | set;
+ break;
+ }
+ }
+ if(i == n_debug_channel && n_debug_channel < __DEBUG_CHANNEL_MAX) {
+ strcpy(debug_channel[i].name, p);
+ debug_channel[i].flags = (debug_flags & ~clr) | set;
+ n_debug_channel++;
+ }
+ }
+ }
+ free(s);
+
+ return 0;
+}