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MINOR: htx: Add functions to get the first block of an HTX message

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It is the first block relatively to the start-line. So it is the start-line if
its position is set (sl_pos != -1), otherwise it is the head. The functions
htx_get_first() and htx_get_first_blk() can be used to get it.  This change is
mandatory to consider 1xx informational messages as part of a response.
This commit is contained in:
Christopher Faulet 2019-05-13 11:36:27 +02:00 committed by Willy Tarreau
parent 9c66b980fa
commit a3ad6b1b8f
1 changed files with 35 additions and 0 deletions
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35
include/common/htx.h
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@ -410,6 +410,41 @@ static inline enum htx_blk_type htx_get_tail_type(const struct htx *htx)
return (blk ? htx_get_blk_type(blk) : HTX_BLK_UNUSED);
}
/* Returns the position of the first block in the HTX message <htx>. It is the
* sl_pos if set, otherwise it is the head.
*
* An signed 32-bits integer is returned to handle -1 case. Blocks position are
* store on unsigned 32-bits integer, but it is impossible to have so much
* blocks to overflow a 32-bits signed integer !
*/
static inline int32_t htx_get_first(const struct htx *htx)
{
if (htx->sl_pos != -1)
return htx->sl_pos;
return htx->head;
}
/* Returns the first HTX block in the HTX message <htx>. If <blk> is the head,
* NULL returned.
*/
static inline struct htx_blk *htx_get_first_blk(const struct htx *htx)
{
int32_t pos;
pos = htx_get_first(htx);
return ((pos == -1) ? NULL : htx_get_blk(htx, pos));
}
/* Returns the type of the first block in the HTX message <htx>. If unset or if
* <htx> is empty, HTX_BLK_UNUSED is returned.
*/
static inline enum htx_blk_type htx_get_first_type(const struct htx *htx)
{
struct htx_blk *blk = htx_get_first_blk(htx);
return (blk ? htx_get_blk_type(blk) : HTX_BLK_UNUSED);
}
/* Returns the position of block immediately before the one pointed by <pos>. If
* the message is empty or if <pos> is the position of the head, -1 returned.
*