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MINOR: htx: Add a function to find the HTX block corresponding to a data offset 

The function htx_find_blk() returns the HTX block containing data with a given
offset, relatively to the beginning of the HTX message. It is a good way to skip
outgoing data and find the first HTX block not already processed.
This commit is contained in:
Christopher Faulet 2018-11-22 11:28:18 +01:00 committed by Willy Tarreau
parent d16b0a7b2d
commit 14e88252f2
1 changed files with 20 additions and 0 deletions
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20
include/proto/htx.h
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@ -278,6 +278,26 @@ static inline int32_t htx_find_front(const struct htx *htx)
return front;
}
/* Returns the HTX block containing data with the <offset>, relatively to the
* beginning of the HTX message <htx>. It returns an htx_ret. if the HTX block is
* not found, htx_ret.blk is set to NULL. Otherwise, it points to the right HTX
* block and htx_ret.ret is set to the remaining offset inside the block.
*/
static inline struct htx_ret htx_find_blk(const struct htx *htx, uint32_t offset)
{
int32_t pos;
for (pos = htx_get_head(htx); pos != -1; pos = htx_get_next(htx, pos)) {
struct htx_blk *blk = htx_get_blk(htx, pos);
uint32_t sz = htx_get_blksz(blk);
if (offset < sz)
return (struct htx_ret){ .blk = blk, .ret = offset };
offset -= sz;
}
return (struct htx_ret){ .blk = NULL };
}
/* Changes the size of the value. It is the caller responsibility to change the
* value itself, make sure there is enough space and update allocated value.
*/