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+#ifndef SNPRINTF_H
+#define SNPRINTF_H
+
+/* ===================================================================
+ * snprintf.h
+ *
+ * This is from
+ * W. Richard Stevens, 'UNIX Network Programming', Vol 1, 2nd Edition,
+ * Prentice Hall, 1998.
+ *
+ * Mark Gates <mgates@nlanr.net>
+ * July 1998
+ *
+ * to use this prototype, make sure HAVE_SNPRINTF is not defined
+ *
+ * =================================================================== */
+
+/*
+ * Throughout the book I use snprintf() because it's safer than sprintf().
+ * But as of the time of this writing, not all systems provide this
+ * function. The function below should only be built on those systems
+ * that do not provide a real snprintf().
+ * The function below just acts like sprintf(); it is not safe, but it
+ * tries to detect overflow.
+ */
+
+#ifndef HAVE_SNPRINTF
+
+ #ifdef __cplusplus
+extern "C" {
+#endif
+
+int snprintf(char *buf, size_t size, const char *fmt, ...);
+
+#ifdef __cplusplus
+} /* end extern "C" */
+ #endif
+
+#endif /* HAVE_SNPRINTF */
+#endif /* SNPRINTF_H */