[src/riastradh-drm2]: src/sys/external/bsd/drm2/include/linux Add hex dumping...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6ccdfdcc8eac
branches:  riastradh-drm2
changeset: 788387:6ccdfdcc8eac
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Wed Jul 24 03:33:48 2013 +0000

description:
Add hex dumping utilities to <linux/printk.h>.

diffstat:

 sys/external/bsd/drm2/include/linux/printk.h |  80 +++++++++++++++++++++++++++-
 1 files changed, 79 insertions(+), 1 deletions(-)

diffs (99 lines):

diff -r 3d043bab31a4 -r 6ccdfdcc8eac sys/external/bsd/drm2/include/linux/printk.h
--- a/sys/external/bsd/drm2/include/linux/printk.h      Wed Jul 24 03:33:27 2013 +0000
+++ b/sys/external/bsd/drm2/include/linux/printk.h      Wed Jul 24 03:33:48 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: printk.h,v 1.1.2.1 2013/07/24 02:37:36 riastradh Exp $ */
+/*     $NetBSD: printk.h,v 1.1.2.2 2013/07/24 03:33:48 riastradh Exp $ */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -32,6 +32,7 @@
 #ifndef _LINUX_PRINTK_H_
 #define _LINUX_PRINTK_H_
 
+#include <sys/param.h>
 #include <sys/systm.h>
 
 #define        printk          printf
@@ -40,4 +41,81 @@
 #define        KERN_WARNING    "drm kern warning: "
 #define        KERN_ERR        "drm kern error: "
 
+#define        DUMP_PREFIX_NONE        0
+#define        DUMP_PREFIX_OFFSET      1
+#define        DUMP_PREFIX_ADDRESS     2
+
+static inline void
+hex_dump_to_buffer(const void *buf, size_t buf_size, int bytes_per_line,
+    int bytes_per_group, char *output, size_t output_size, bool ascii __unused)
+{
+       const uint8_t *bytes = buf;
+       size_t i = 0, n;
+
+       KASSERT(output_size >= 1);
+       KASSERT((bytes_per_line == 16) || (bytes_per_line == 32));
+       KASSERT(powerof2(bytes_per_group));
+       KASSERT(0 < bytes_per_group);
+       KASSERT(bytes_per_group <= 8);
+
+       output[output_size - 1] = '\0';
+       while (i < buf_size) {
+               n = snprintf(output, output_size, "%02x", bytes[i++]);
+               if (n >= output_size)
+                       break;
+               output += n; output_size -= n;
+               if ((i == buf_size) || (0 == (i % bytes_per_line)))
+                       n = snprintf(output, output_size, "\n");
+               else if ((0 < i) && (0 == (i % bytes_per_group)))
+                       n = snprintf(output, output_size, " ");
+               else
+                       n = 0;
+               if (n >= output_size)
+                       break;
+               output += n; output_size -= n;
+       }
+}
+
+static inline void
+print_hex_dump(const char *level, const char *prefix, int prefix_type,
+    int bytes_per_line, int bytes_per_group, const void *buf, size_t buf_size,
+    bool ascii)
+{
+       const uint8_t *bytes = buf;
+       /* Two digits and one space/newline per byte, plus a null.  */
+       char line[32*3 + 1];
+
+       KASSERT((bytes_per_line == 16) || (bytes_per_line == 32));
+       KASSERT(powerof2(bytes_per_group));
+       KASSERT(0 < bytes_per_group);
+       KASSERT(bytes_per_group <= 8);
+
+       while (0 < buf_size) {
+               const size_t n = MIN(buf_size, 32);
+
+               switch (prefix_type) {
+               case DUMP_PREFIX_OFFSET:
+                       printf("%08zu: ", (bytes - (const uint8_t *)buf));
+                       break;
+
+               case DUMP_PREFIX_ADDRESS:
+                       printf("%p: ", bytes);
+                       break;
+
+               case DUMP_PREFIX_NONE:
+               default:
+                       break;
+               }
+
+               hex_dump_to_buffer(bytes, n, bytes_per_line, bytes_per_group,
+                   line, sizeof(line), ascii);
+               KASSERT(0 < strnlen(line, sizeof(line)));
+               KASSERT(line[strnlen(line, sizeof(line)) - 1] == '\n');
+               printf("%s", line);
+
+               bytes += n;
+               buf_size -= n;
+       }
+}
+
 #endif  /* _LINUX_LIST_H_ */