1 files changed, 146 insertions, 0 deletions
diff --git a/src/io/error.h b/src/io/error.h
new file mode 100644
index 0000000..e4267a0
--- /dev/null
+++ b/src/io/error.h
@@ -0,0 +1,146 @@
+#ifndef _ZoO_IO_ERROR_H_
+#define _ZoO_IO_ERROR_H_
+
+#include <stdio.h>
+
+#include "../pervasive.h"
+
+#define ZoO_DEBUG_ALL 1
+
+#ifndef ZoO_DEBUG_ALL
+   #define ZoO_DEBUG_ALL 0
+#endif
+
+#ifndef ZoO_DEBUG_PROGRAM_FLOW
+   #define ZoO_DEBUG_PROGRAM_FLOW   (0 || ZoO_DEBUG_ALL)
+#endif
+
+#ifndef ZoO_DEBUG_CONFIG
+   #define ZoO_DEBUG_CONFIG         (0 || ZoO_DEBUG_ALL)
+#endif
+
+#ifndef ZoO_DEBUG_LEARNING
+   #define ZoO_DEBUG_LEARNING       (0 || ZoO_DEBUG_ALL)
+#endif
+
+#ifndef ZoO_DEBUG_NETWORK
+   #define ZoO_DEBUG_NETWORK        (0 || ZoO_DEBUG_ALL)
+#endif
+
+#define ZoO_ENABLE_WARNINGS_OUTPUT              1
+#define ZoO_ENABLE_RUNTIME_ERRORS_OUTPUT        1
+#define ZoO_ENABLE_PROGRAMMING_ERRORS_OUTPUT    1
+#define ZoO_ENABLE_FATAL_ERROR_OUTPUT           1
+
+#ifdef ZoO_ENABLE_ERROR_LOCATION
+   #define ZoO_LOCATION "[" __FILE__ "][" ZoO_TO_STRING(__LINE__) "]"
+#else
+   #define ZoO_LOCATION ""
+#endif
+
+#define ZoO_PRINT_STDERR(symbol, str, ...)\
+   fprintf(stderr, "[" symbol "]" ZoO_LOCATION " " str "\n", __VA_ARGS__);
+
+/*
+ * Given that we use preprocessor contants as flags, we can expect the compilers
+ * to remove the test condition for disabled flags. No need to be shy about
+ * allowing many debug options.
+ */
+
+#define ZoO_DEBUG(flag, str, ...)\
+   ZoO_ISOLATE\
+   (\
+      if (flag)\
+      {\
+         ZoO_PRINT_STDERR("D", str, __VA_ARGS__);\
+      }\
+   )
+
+
+#define ZoO_WARNING(str, ...)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_WARNINGS_OUTPUT)\
+      {\
+         ZoO_PRINT_STDERR("W", str, __VA_ARGS__);\
+      }\
+   )
+
+#define ZoO_ERROR(str, ...)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_RUNTIME_ERRORS_OUTPUT)\
+      {\
+         ZoO_PRINT_STDERR("E", str, __VA_ARGS__);\
+      }\
+   )
+
+#define ZoO_PROG_ERROR(str, ...)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_PROGRAMMING_ERRORS_OUTPUT)\
+      {\
+         ZoO_PRINT_STDERR("P", str, __VA_ARGS__);\
+      }\
+   )
+
+#define ZoO_FATAL(str, ...)\
+   ZoO_ISOLATE\
+   (\
+     if (ZoO_ENABLE_FATAL_ERROR_OUTPUT)\
+      {\
+         ZoO_PRINT_STDERR("F", str, __VA_ARGS__);\
+      }\
+   )
+
+/* For outputs without dynamic content (static). ******************************/
+
+#define ZoO_PRINT_S_STDERR(symbol, str)\
+   fprintf(stderr, "[" symbol "]" ZoO_LOCATION " " str "\n");
+
+#define ZoO_S_DEBUG(flag, str)\
+   ZoO_ISOLATE\
+   (\
+      if (flag)\
+      {\
+         ZoO_PRINT_S_STDERR("D", str);\
+      }\
+   )
+
+#define ZoO_S_WARNING(str)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_WARNINGS_OUTPUT)\
+      {\
+         ZoO_PRINT_S_STDERR("W", str);\
+      }\
+   )
+
+#define ZoO_S_ERROR(str)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_RUNTIME_ERRORS_OUTPUT)\
+      {\
+         ZoO_PRINT_S_STDERR("E", str);\
+      }\
+   )
+
+#define ZoO_S_PROG_ERROR(str)\
+   ZoO_ISOLATE\
+   (\
+      if (ZoO_ENABLE_PROGRAMMING_ERRORS_OUTPUT)\
+      {\
+         ZoO_PRINT_S_STDERR("P", str);\
+      }\
+   )
+
+#define ZoO_S_FATAL(str)\
+   ZoO_ISOLATE\
+   (\
+     if (ZoO_ENABLE_FATAL_ERROR_OUTPUT)\
+      {\
+         ZoO_PRINT_S_STDERR("F", str);\
+      }\
+   )
+
+#endif