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Add iov_hexdump() 

Useful for debugging purposes.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-07-12 13:35:10 +02:00
parent fa57ee8ed2
commit 3a1dca94d6
2 changed files with 33 additions and 0 deletions
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31
iov.c
View File

@ -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");
}
}

2
iov.h
View File

@ -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);