Patchwork [02/16] Add iov_hexdump()

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Submitter Gerd Hoffmann
Date Aug. 4, 2011, 3:10 p.m.
Message ID <1312470626-25872-3-git-send-email-kraxel@redhat.com>
Download mbox | patch
Permalink /patch/108508/
State New
Headers show

Comments

Gerd Hoffmann - Aug. 4, 2011, 3:10 p.m.
Useful for debugging purposes.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 iov.c |   31 +++++++++++++++++++++++++++++++
 iov.h |    2 ++
 2 files changed, 33 insertions(+), 0 deletions(-)

Patch

diff --git a/iov.c b/iov.c
index 1e02791..60553c7 100644
--- a/iov.c
+++ b/iov.c
@@ -73,3 +73,34 @@  size_t iov_size(const struct iovec *iov, const unsigned int iov_cnt)
     }
     return len;
 }
+
+void iov_hexdump(const struct iovec *iov, const unsigned int iov_cnt,
+                 FILE *fp, const char *prefix, size_t limit)
+{
+    unsigned int i, v, b;
+    uint8_t *c;
+
+    c = iov[0].iov_base;
+    for (i = 0, v = 0, b = 0; b < limit; i++, b++) {
+        if (i == iov[v].iov_len) {
+            i = 0; v++;
+            if (v == iov_cnt) {
+                break;
+            }
+            c = iov[v].iov_base;
+        }
+        if ((b % 16) == 0) {
+            fprintf(fp, "%s: %04x:", prefix, b);
+        }
+        if ((b % 4) == 0) {
+            fprintf(fp, " ");
+        }
+        fprintf(fp, " %02x", c[i]);
+        if ((b % 16) == 15) {
+            fprintf(fp, "\n");
+        }
+    }
+    if ((b % 16) != 0) {
+        fprintf(fp, "\n");
+    }
+}
diff --git a/iov.h b/iov.h
index 110f67a..c2c5b39 100644
--- a/iov.h
+++ b/iov.h
@@ -17,3 +17,5 @@  size_t iov_from_buf(struct iovec *iov, unsigned int iov_cnt,
 size_t iov_to_buf(const struct iovec *iov, const unsigned int iov_cnt,
                   void *buf, size_t iov_off, size_t size);
 size_t iov_size(const struct iovec *iov, const unsigned int iov_cnt);
+void iov_hexdump(const struct iovec *iov, const unsigned int iov_cnt,
+                 FILE *fp, const char *prefix, size_t limit);