From 3a1dca94d6dba00fe0fd4c4a28449f57e01b9b6c Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 12 Jul 2011 13:35:10 +0200 Subject: [PATCH] Add iov_hexdump() Useful for debugging purposes. Signed-off-by: Gerd Hoffmann --- iov.c | 31 +++++++++++++++++++++++++++++++ iov.h | 2 ++ 2 files changed, 33 insertions(+) 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); -- 2.7.4