Add library

src/error.c

@@ -0,0 +1,86 @@
+#include "error.h"
+#include "stdlib.h"
+
+ErrorContext __error_last_ditch;
+ErrorContext *__error_last_ignored;
+ErrorUnhandledErrorHandler error_handler_unhandled_error;
+
+char *__ERROR_NAMES[] = {
+  "",
+  "Null Pointer Error",
+  "Out Of Bounds Error",
+  "SDL Library Error",
+  "Attribute Error",
+  "Type Error",
+  "Key Error",
+  "Heap Error",
+  "Index Error",
+  "Format Error",
+  "Input Output Error",
+  "Registry Error",
+  "Value Error",
+  "Behavior Error",
+  "Relationship Error"
+};
+
+ErrorContext HEAP_ERROR[MAX_HEAP_ERROR];
+
+void error_init()
+{
+    static int inited = 0;
+    if ( inited == 0 ) {
+	for (int i = 0; i < MAX_HEAP_ERROR; i++ ) {
+	    memset((void *)&HEAP_ERROR[i], 0x00, sizeof(ErrorContext));
+	    HEAP_ERROR[i].heapid = i;
+	    HEAP_ERROR[i].stacktracebufptr = (char *)&HEAP_ERROR[i].stacktracebuf;
+	}
+	__error_last_ignored = NULL;
+	memset((void *)&__error_last_ditch, 0x00, sizeof(ErrorContext));
+	__error_last_ditch.stacktracebufptr = (char *)&__error_last_ditch.stacktracebuf;
+	error_handler_unhandled_error = &error_default_handler_unhandled_error;
+	inited = 1;
+    }
+}
+
+void error_default_handler_unhandled_error(ErrorContext *errctx)
+{
+  if ( errctx == NULL ) {
+    exit(1);
+  }
+  exit(errctx->status);
+}
+
+ErrorContext *heap_next_error()
+{
+    for (int i = 0; i < MAX_HEAP_ERROR; i++ ) {
+	if ( HEAP_ERROR[i].refcount == 0 ) {
+	    return &HEAP_ERROR[i];
+	}
+    }
+    return (ErrorContext *)NULL;
+}
+
+ErrorContext *heap_release_error(ErrorContext *err)
+{
+    int oldid = 0;
+    if ( err == NULL ) {
+	ErrorContext *errctx = &__error_last_ditch;
+	FAIL_RETURN(errctx, ERR_NULLPOINTER, "heap_release_error got NULL context pointer");
+    }
+    if ( err->refcount > 0 ) {
+      err->refcount -= 1;
+    }
+    if ( err->refcount == 0 ) {
+	oldid = err->heapid;
+	memset(err, 0x00, sizeof(ErrorContext));
+	err->stacktracebufptr = (char *)&err->stacktracebuf;
+	err->heapid = oldid;
+	return NULL;
+    }
+    return err;
+}
+
+char *error_name_for_status(int status)
+{
+  return __ERROR_NAMES[status];
+}