Get some of the last remaining C files into C++

They still need to be fixed up, but they now build with C++.

dpid/dpid_common.hh

@@ -0,0 +1,64 @@
+#ifndef DPID_COMMON_H
+#define DPID_COMMON_H
+
+/*! \file
+ * Declares common functions, global variables, and types.
+ *
+ * \todo
+ * The dpid error codes will be used in
+ * the next patch
+ */
+
+
+#include <dirent.h>
+#include <stddef.h> /* size_t */
+#include <sys/types.h> /* ssize_t */
+
+#include "../dlib/dlib.hh"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*
+ * Debugging macros
+ */
+#define _MSG(...)
+#define MSG(...)  printf("[dpid]: " __VA_ARGS__)
+#define MSG_ERR(...)  fprintf(stderr, "[dpid]: " __VA_ARGS__)
+
+#define dotDILLO_DPI ".flenser/dpi"
+#define dotDILLO_DPIDRC ".flenser/dpidrc"
+#define dotDILLO_DPID_COMM_KEYS ".flenser/dpid_comm_keys"
+
+#define ERRMSG(CALLER, CALLED, ERR)\
+ errmsg(CALLER, CALLED, ERR, __FILE__, __LINE__)
+#define _ERRMSG(CALLER, CALLED, ERR)
+
+
+/*!
+ * Macros for calling ckd_write and ckd_close functions
+ */
+#define CKD_WRITE(fd, msg) ckd_write(fd, msg, __FILE__, __LINE__)
+#define CKD_CLOSE(fd)      ckd_close(fd, __FILE__, __LINE__)
+
+/*! Intended for identifying dillo plugins
+ * and related files
+ */
+enum file_type {
+   DPI_FILE,                     /*! Any file name containing .dpi */
+   UNKNOWN_FILE
+};
+
+
+void errmsg(char *caller, char *called, int errornum, char *file, int line);
+
+ssize_t ckd_write(int fd, char *msg, char *file, int line);
+ssize_t ckd_close(int fd, char *file, int line);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif