X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fendian%2F_info.c;fp=ccan%2Fendian%2F_info.c;h=ae63e14eb53c0840860a9a5b3c833522b23c13ab;hp=0000000000000000000000000000000000000000;hb=96d128229c74480497ecb230d0e3014bbc113e95;hpb=39859e26e56171d0ebd4ee26a839e49f0db92a9c

diff --git a/ccan/endian/_info.c b/ccan/endian/_info.c
new file mode 100644
index 00000000..ae63e14e
--- /dev/null
+++ b/ccan/endian/_info.c
@@ -0,0 +1,51 @@
+#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]);
+ *
+ *		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", swab_u32(value));
+ *		exit(0);
+ *	}
+ *
+ * Licence: LGPL (2 or any later version)
+ */
+int main(int argc, char *argv[])
+{
+	if (argc != 2)
+		return 1;
+
+	if (strcmp(argv[1], "depends") == 0)
+		/* Nothing */
+		return 0;
+
+	return 1;
+}