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+#include <stdio.h>
+#include <string.h>
+#include "config.h"
+
+/**
+ * endian - endian conversion macros for simple types
+ *
+ * Portable protocols (such as on-disk formats, or network protocols)
+ * are often defined to be a particular endian: little-endian (least
+ * significant bytes first) or big-endian (most significant bytes
+ * first).
+ *
+ * Similarly, some CPUs lay out values in memory in little-endian
+ * order (most commonly, Intel's 8086 and derivatives), or big-endian
+ * order (almost everyone else).
+ *
+ * This module provides conversion routines, inspired by the linux kernel.
+ *
+ * Example:
+ * #include <stdio.h>
+ * #include <err.h>
+ * #include <ccan/endian/endian.h>
+ *
+ * //
+ * int main(int argc, char *argv[])
+ * {
+ * uint32_t value;
+ *
+ * if (argc != 2)
+ * errx(1, "Usage: %s <value>", argv[0]);
+ *
+ * value = atoi(argv[1]);
+ * printf("native: %08x\n", value);
+ * printf("little-endian: %08x\n", cpu_to_le32(value));
+ * printf("big-endian: %08x\n", cpu_to_be32(value));
+ * printf("byte-reversed: %08x\n", bswap_32(value));
+ * exit(0);
+ * }
+ *
+ * License: LGPL (2 or any later version)
+ * Author: Rusty Russell <rusty@rustcorp.com.au>
+ */
+int main(int argc, char *argv[])
+{
+ if (argc != 2)
+ return 1;
+
+ if (strcmp(argv[1], "depends") == 0)
+ /* Nothing */
+ return 0;
+
+ return 1;
+}