1 files changed, 75 insertions, 0 deletions
diff --git a/aff4_errors.h b/aff4_errors.h
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+++ b/aff4_errors.h
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+/* AFF4 error functions.
+ *
+ * Copyright 2010, Michael Cohen <sucdette@gmail.com>.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef AFF4_ERRORS_H_
+#define AFF4_ERRORS_H_
+
+#include "class.h"
+
+// Some helpful little things
+#define ERROR_BUFFER_SIZE 1024
+
+/** This is used for error reporting. This is similar to the way
+    python does it, i.e. we set the error flag and return NULL.
+*/
+#define  EZero             0
+#define  EGeneric          1
+#define  EOverflow         2
+#define  EWarning          3
+#define  EUnderflow        4
+#define  EIOError          5
+#define  ENoMemory         6
+#define  EInvalidParameter 7
+#define  ERuntimeError     8
+#define  EKeyError         9
+  // Reserved for impossible conditions
+#define  EProgrammingError 10
+
+DLL_PUBLIC void *aff4_raise_errors(int t, char *string,  ...);
+
+/** We only set the error state if its not already set */
+#define RaiseError(t, message, ...)                                     \
+  aff4_raise_errors(t, "%s: (%s:%d) " message, __FUNCTION__, __FILE__, __LINE__, ## __VA_ARGS__);
+
+#define LogWarnings(format, ...)		\
+  do {						\
+    RaiseError(EWarning, format, ## __VA_ARGS__);	\
+    PrintError();				\
+  } while(0);
+
+#define ClearError()				\
+  do {*aff4_get_current_error(NULL) = EZero;} while(0);
+
+#define PrintError()				\
+  do {char *error_str; if(*aff4_get_current_error(&error_str)) fprintf(stdout, "%s", error_str); fflush(stdout); ClearError(); }while(0);
+
+#define CheckError(error)			\
+  (*aff4_get_current_error(NULL) == error)
+
+/** The current error state is returned by this function.
+
+    This is done in a thread safe manner.
+ */
+DLL_PUBLIC int *aff4_get_current_error(char **error_str);
+
+
+// These macros are used when we need to do something which might
+// change the error state on the error path of a function.
+#define PUSH_ERROR_STATE { int *tmp_error_p = aff4_get_current_error(NULL); int tmp_error = *tmp_error_p; int exception __attribute__((unused));
+
+#define POP_ERROR_STATE *tmp_error_p = tmp_error;};
+
+#endif /* !AFF4_ERRORS_H_ */