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JSON Parser performance improvements

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This commit is contained in:
Günter Obiltschnig 2021-06-15 20:18:41 +02:00
parent c4c2df26b3
commit f7d7660335
1 changed files with 11 additions and 8 deletions
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19
JSON/src/ParserImpl.cpp
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@ -38,14 +38,14 @@ extern "C"
{
static int istream_get(void* ptr)
{
std::istream* pIstr = reinterpret_cast<std::istream*>(ptr);
return pIstr->get();
std::streambuf* pBuf = reinterpret_cast<std::streambuf*>(ptr);
return pBuf->sbumpc();
}
static int istream_peek(void* ptr)
{
std::istream* pIstr = reinterpret_cast<std::istream*>(ptr);
return pIstr->peek();
std::streambuf* pBuf = reinterpret_cast<std::streambuf*>(ptr);
return pBuf->sgetc();
}
}
@ -102,7 +102,7 @@ void ParserImpl::handle(std::istream& json)
{
try
{
json_open_user(_pJSON, istream_get, istream_peek, &json);
json_open_user(_pJSON, istream_get, istream_peek, json.rdbuf());
checkError();
json_set_streaming(_pJSON, false);
handle();
@ -193,6 +193,9 @@ void ParserImpl::stripComments(std::string& json)
void ParserImpl::handleArray()
{
if (json_get_depth(_pJSON) > _depth)
throw JSONException("Maximum depth exceeded");
json_type tok = json_peek(_pJSON);
while (tok != JSON_ARRAY_END && checkError())
{
@ -210,6 +213,9 @@ void ParserImpl::handleArray()
void ParserImpl::handleObject()
{
if (json_get_depth(_pJSON) > _depth)
throw JSONException("Maximum depth exceeded");
json_type tok = json_peek(_pJSON);
while (tok != JSON_OBJECT_END && checkError())
{
@ -229,9 +235,6 @@ void ParserImpl::handleObject()
void ParserImpl::handle()
{
if (json_get_depth(_pJSON) > _depth)
throw JSONException("Maximum depth exceeded");
enum json_type type = json_next(_pJSON);
switch (type)
{