Added new error handling code, to simplify error handling

2 files changed, 133 insertions, 0 deletions

diff --git a/src/dmierror.c b/src/dmierror.c
new file mode 100644
index 0000000..03d260a
--- /dev/null
+++ b/src/dmierror.c
@@ -0,0 +1,79 @@
+/*   Simpilfied and improved Python Error/Exception functions
+ *
+ *   2009 (C) David Sommerseth <davids@redhat.com>
+ *
+ *   This program 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.
+ *
+ *   This program 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, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ *   For the avoidance of doubt the "preferred form" of this code is one which
+ *   is in an open unpatent encumbered format. Where cryptographic key signing
+ *   forms part of the process of creating an executable the information
+ *   including keys needed to generate an equivalently functional executable
+ *   are deemed to be part of the source code.
+ */
+
+/**
+ *  @file dmierror.h
+ *  @brief Simpilfied and improved Python Error/Exception functions
+ *  @author David Sommerseth <davids@redhat.com>
+ */
+
+// #include <Python.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#define PRINT_ERRORS 1
+
+/**
+ *  A more flexible function for setting error messages.  This function
+ *  is called via PyReturnError(...) macro which also returns NULL.
+ *  @author David Sommerseth <davids@redhat.com>
+ *  @param  PyObject*    A Python Exception object
+ *  @param  const char*  Error message to follow the exception, may be string formated
+ *
+ */
+void _pyReturnError(void *exception, const char *fname, int line, const char *fmt, ...)
+{
+        va_list ap;
+        char *buf = NULL;
+
+        va_start(ap, fmt);
+        buf = (char *) malloc(4098);
+        memset(buf, 0, 4098);
+
+        if( buf == NULL ) {
+                // Backup routine if we can't get the needed memory
+                fprintf(stderr, "\n\n** ERROR ALLOCATING ERROR MESSAGE BUFFER\n\n");
+                fprintf(stderr, "** ERROR: [%s:%i] ", fname, line);
+                vfprintf(stderr, fmt, ap);
+                fprintf(stderr, "\n");
+                va_end(ap);
+                return;
+        }
+
+        // Set the error state and message
+        snprintf(buf, 4096, "[%s:%i] %s", fname, line, fmt);
+        /// PyErr_Format(exception, buf, ap);
+
+#ifdef PRINT_ERRORS
+        fprintf(stderr, "\n**\n** ERROR: ");
+        vfprintf(stderr, buf, ap);
+        fprintf(stderr, "\n**\n\n");
+#endif
+        va_end(ap);
+        free(buf); buf = NULL;
+}
+
diff --git a/src/dmierror.h b/src/dmierror.h
new file mode 100644
index 0000000..0fa0858
--- /dev/null
+++ b/src/dmierror.h
@@ -0,0 +1,54 @@
+/*   Simpilfied and improved Python Error/Exception functions
+ *
+ *   2009 (C) David Sommerseth <davids@redhat.com>
+ *
+ *   This program 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.
+ *
+ *   This program 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, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ *   For the avoidance of doubt the "preferred form" of this code is one which
+ *   is in an open unpatent encumbered format. Where cryptographic key signing
+ *   forms part of the process of creating an executable the information
+ *   including keys needed to generate an equivalently functional executable
+ *   are deemed to be part of the source code.
+ */
+
+/**
+ *  @file dmierror.h
+ *  @brief Simpilfied and improved Python Error/Exception functions
+ *  @author David Sommerseth <davids@redhat.com>
+ */
+
+
+#ifndef DMIERROR_H
+#define DMIERROR_H
+
+#include <stdarg.h>
+
+void _pyReturnError(PyObject *exception, const char *fname, int line, const char *msgfmt, ...);
+
+/**
+ *  A more flexible function for setting error messages.
+ *  This macro is the one which is supposed to be used in programs, as it will
+ *  also exit the calling function with NULL.
+ *  @author David Sommerseth <davids@redhat.com>
+ *  @param  PyObject*    A Python Exception object
+ *  @param  const char*  Error message to follow the exception, may be string formated
+ */
+#define PyReturnError(Exception, msg...) {                              \
+                _pyReturnError(Exception, __FILE__, __LINE__,## msg);   \
+                return NULL;                                            \
+        }
+
+
+#endif