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nghtp2_hd: Calculate hash values once

This commit is contained in:
Tatsuhiro Tsujikawa 2014-08-06 22:00:12 +09:00
parent 49e3fd6862
commit 6ccf06c6da
2 changed files with 31 additions and 20 deletions
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44
lib/nghttp2_hd.c
View File

@ -126,7 +126,8 @@ static uint32_t hash(const uint8_t *s, size_t n)
int nghttp2_hd_entry_init(nghttp2_hd_entry *ent, uint8_t flags,
uint8_t *name, size_t namelen,
uint8_t *value, size_t valuelen)
uint8_t *value, size_t valuelen,
uint32_t name_hash, uint32_t value_hash)
{
int rv = 0;
@ -167,16 +168,10 @@ int nghttp2_hd_entry_init(nghttp2_hd_entry *ent, uint8_t flags,
ent->nv.valuelen = valuelen;
ent->ref = 1;
ent->flags = flags;
if(ent->nv.name) {
ent->name_hash = hash(ent->nv.name, ent->nv.namelen);
} else {
ent->name_hash = 0;
}
if(ent->nv.value) {
ent->value_hash = hash(ent->nv.value, ent->nv.valuelen);
} else {
ent->value_hash = 0;
}
ent->name_hash = name_hash;
ent->value_hash = value_hash;
return 0;
fail2:
@ -753,6 +748,8 @@ static int emit_newname_block(nghttp2_bufs *bufs, const nghttp2_nv *nv,
static nghttp2_hd_entry* add_hd_table_incremental(nghttp2_hd_context *context,
const nghttp2_nv *nv,
uint32_t name_hash,
uint32_t value_hash,
uint8_t entry_flags)
{
int rv;
@ -787,7 +784,8 @@ static nghttp2_hd_entry* add_hd_table_incremental(nghttp2_hd_context *context,
}
rv = nghttp2_hd_entry_init(new_ent, entry_flags,
nv->name, nv->namelen, nv->value, nv->valuelen);
nv->name, nv->namelen, nv->value, nv->valuelen,
name_hash, value_hash);
if(rv != 0) {
free(new_ent);
return NULL;
@ -837,12 +835,11 @@ typedef struct {
} search_result;
static search_result search_hd_table(nghttp2_hd_context *context,
const nghttp2_nv *nv)
const nghttp2_nv *nv,
uint32_t name_hash, uint32_t value_hash)
{
search_result res = { -1, 0 };
size_t i;
uint32_t name_hash = hash(nv->name, nv->namelen);
uint32_t value_hash = hash(nv->value, nv->valuelen);
int use_index = (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX) == 0;
for(i = 0; i < NGHTTP2_STATIC_TABLE_LENGTH; ++i) {
@ -977,6 +974,8 @@ static int deflate_nv(nghttp2_hd_deflater *deflater,
search_result res;
ssize_t idx = -1;
int incidx = 0;
uint32_t name_hash = hash(nv->name, nv->namelen);
uint32_t value_hash = hash(nv->value, nv->valuelen);
DEBUGF(fprintf(stderr, "deflatehd: deflating "));
DEBUGF(fwrite(nv->name, nv->namelen, 1, stderr));
@ -984,7 +983,8 @@ static int deflate_nv(nghttp2_hd_deflater *deflater,
DEBUGF(fwrite(nv->value, nv->valuelen, 1, stderr));
DEBUGF(fprintf(stderr, "\n"));
res = search_hd_table(&deflater->ctx, nv);
res = search_hd_table(&deflater->ctx, nv, name_hash, value_hash);
idx = res.index;
@ -1012,9 +1012,11 @@ static int deflate_nv(nghttp2_hd_deflater *deflater,
nv_indname = *nv;
nv_indname.name = nghttp2_hd_table_get(&deflater->ctx, idx)->nv.name;
new_ent = add_hd_table_incremental(&deflater->ctx, &nv_indname,
name_hash, value_hash,
NGHTTP2_HD_FLAG_VALUE_ALLOC);
} else {
new_ent = add_hd_table_incremental(&deflater->ctx, nv,
name_hash, value_hash,
NGHTTP2_HD_FLAG_NAME_ALLOC |
NGHTTP2_HD_FLAG_VALUE_ALLOC);
}
@ -1383,7 +1385,10 @@ static int hd_inflate_commit_newname(nghttp2_hd_inflater *inflater,
management. */
ent_flags = NGHTTP2_HD_FLAG_NAME_ALLOC | NGHTTP2_HD_FLAG_NAME_GIFT;
new_ent = add_hd_table_incremental(&inflater->ctx, &nv, ent_flags);
new_ent = add_hd_table_incremental(&inflater->ctx, &nv,
hash(nv.name, nv.namelen),
hash(nv.value, nv.valuelen),
ent_flags);
if(new_ent) {
emit_indexed_header(nv_out, new_ent);
@ -1453,7 +1458,10 @@ static int hd_inflate_commit_indname(nghttp2_hd_inflater *inflater,
++ent_name->ref;
}
new_ent = add_hd_table_incremental(&inflater->ctx, &nv, ent_flags);
new_ent = add_hd_table_incremental(&inflater->ctx, &nv,
ent_name->name_hash,
hash(nv.value, nv.valuelen),
ent_flags);
if(!static_name && --ent_name->ref == 0) {
nghttp2_hd_entry_free(ent_name);

7
lib/nghttp2_hd.h
View File

@ -168,7 +168,9 @@ struct nghttp2_hd_inflater {
* set in the |flags|, the content pointed by the |name| with length
* |namelen| is copied. Likewise, if NGHTTP2_HD_FLAG_VALUE_ALLOC bit
* set in the |flags|, the content pointed by the |value| with length
* |valuelen| is copied.
* |valuelen| is copied. The |name_hash| and |value_hash| are hash
* value for |name| and |value| respectively. The hash function is
* defined in nghttp2_hd.c.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
@ -178,7 +180,8 @@ struct nghttp2_hd_inflater {
*/
int nghttp2_hd_entry_init(nghttp2_hd_entry *ent, uint8_t flags,
uint8_t *name, size_t namelen,
uint8_t *value, size_t valuelen);
uint8_t *value, size_t valuelen,
uint32_t name_hash, uint32_t value_hash);
void nghttp2_hd_entry_free(nghttp2_hd_entry *ent);