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Commit96210fc

Browse files
author
Nikita Glukhov
committed
Extract jsonbFindKeyInObject(), jsonbFindValueInArray(), JsonbArrayIterator
1 parent44dc26b commit96210fc

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1 file changed

+85
-39
lines changed

1 file changed

+85
-39
lines changed

‎src/backend/utils/adt/jsonb_util.c

Lines changed: 85 additions & 39 deletions
Original file line numberDiff line numberDiff line change
@@ -335,6 +335,85 @@ compareJsonbContainers(JsonbContainer *a, JsonbContainer *b)
335335
returnres;
336336
}
337337

338+
staticJsonbValue*
339+
jsonbFindKeyInObject(constJsonbContainer*container,constJsonbValue*key)
340+
{
341+
returngetIthJsonbValueFromContainer(container,key->val.string.val,
342+
key->val.string.len,NULL);
343+
}
344+
345+
typedefstructJsonbArrayIterator
346+
{
347+
constJsonbContainer*container;
348+
char*base_addr;
349+
intindex;
350+
intcount;
351+
uint32offset;
352+
}JsonbArrayIterator;
353+
354+
staticvoid
355+
JsonbArrayIteratorInit(JsonbArrayIterator*it,constJsonbContainer*container)
356+
{
357+
it->container=container;
358+
it->index=0;
359+
it->count= (container->header&JB_CMASK);
360+
it->offset=0;
361+
it->base_addr= (char*) (container->children+it->count);
362+
}
363+
364+
staticbool
365+
JsonbArrayIteratorNext(JsonbArrayIterator*it,JsonbValue*result)
366+
{
367+
if (it->index >=it->count)
368+
return false;
369+
370+
fillJsonbValue(it->container,it->index,it->base_addr,it->offset,result);
371+
372+
JBE_ADVANCE_OFFSET(it->offset,it->container->children[it->index]);
373+
374+
it->index++;
375+
376+
return true;
377+
}
378+
379+
staticJsonbValue*
380+
JsonbArrayIteratorGetIth(JsonbArrayIterator*it,uint32i)
381+
{
382+
JsonbValue*result;
383+
384+
if (i >=it->count)
385+
returnNULL;
386+
387+
result=palloc(sizeof(JsonbValue));
388+
389+
fillJsonbValue(it->container,i,it->base_addr,
390+
getJsonbOffset(it->container,i),
391+
result);
392+
393+
returnresult;
394+
}
395+
396+
staticJsonbValue*
397+
jsonbFindValueInArray(constJsonbContainer*container,constJsonbValue*key)
398+
{
399+
JsonbArrayIteratorit;
400+
JsonbValue*result=palloc(sizeof(JsonbValue));
401+
402+
JsonbArrayIteratorInit(&it,container);
403+
404+
while (JsonbArrayIteratorNext(&it,result))
405+
{
406+
if (key->type==result->type)
407+
{
408+
if (equalsJsonbScalarValue(key,result))
409+
returnresult;
410+
}
411+
}
412+
413+
pfree(result);
414+
returnNULL;
415+
}
416+
338417
/*
339418
* Find value in object (i.e. the "value" part of some key/value pair in an
340419
* object), or find a matching element if we're looking through an array. Do
@@ -362,10 +441,9 @@ compareJsonbContainers(JsonbContainer *a, JsonbContainer *b)
362441
* return NULL. Otherwise, return palloc()'d copy of value.
363442
*/
364443
JsonbValue*
365-
findJsonbValueFromContainer(JsonbContainer*container,uint32flags,
444+
findJsonbValueFromContainer(constJsonbContainer*container,uint32flags,
366445
JsonbValue*key)
367446
{
368-
JEntry*children=container->children;
369447
intcount=JsonContainerSize(container);
370448

371449
Assert((flags& ~(JB_FARRAY |JB_FOBJECT))==0);
@@ -375,27 +453,7 @@ findJsonbValueFromContainer(JsonbContainer *container, uint32 flags,
375453
returnNULL;
376454

377455
if ((flags&JB_FARRAY)&&JsonContainerIsArray(container))
378-
{
379-
JsonbValue*result=palloc(sizeof(JsonbValue));
380-
char*base_addr= (char*) (children+count);
381-
uint32offset=0;
382-
inti;
383-
384-
for (i=0;i<count;i++)
385-
{
386-
fillJsonbValue(container,i,base_addr,offset,result);
387-
388-
if (key->type==result->type)
389-
{
390-
if (equalsJsonbScalarValue(key,result))
391-
returnresult;
392-
}
393-
394-
JBE_ADVANCE_OFFSET(offset,children[i]);
395-
}
396-
397-
pfree(result);
398-
}
456+
returnjsonbFindValueInArray(container,key);
399457
elseif ((flags&JB_FOBJECT)&&JsonContainerIsObject(container))
400458
{
401459
/* Object key passed by caller must be a string */
@@ -488,26 +546,14 @@ getKeyJsonValueFromContainer(const JsonbContainer *container,
488546
JsonbValue*
489547
getIthJsonbValueFromContainer(JsonbContainer*container,uint32i)
490548
{
491-
JsonbValue*result;
492-
char*base_addr;
493-
uint32nelements;
549+
JsonbArrayIteratorit;
494550

495551
if (!JsonContainerIsArray(container))
496552
elog(ERROR,"not a jsonb array");
497553

498-
nelements=JsonContainerSize(container);
499-
base_addr= (char*)&container->children[nelements];
500-
501-
if (i >=nelements)
502-
returnNULL;
503-
504-
result=palloc(sizeof(JsonbValue));
505-
506-
fillJsonbValue(container,i,base_addr,
507-
getJsonbOffset(container,i),
508-
result);
554+
JsonbArrayIteratorInit(&it,container);
509555

510-
returnresult;
556+
returnJsonbArrayIteratorGetIth(&it,i);
511557
}
512558

513559
/*
@@ -638,7 +684,7 @@ pushJsonbValue(JsonbParseState **pstate, JsonbIteratorToken seq,
638684
* Do the actual pushing, with only scalar or pseudo-scalar-array values
639685
* accepted.
640686
*/
641-
staticJsonbValue*
687+
JsonbValue*
642688
pushJsonbValueScalar(JsonbParseState**pstate,JsonbIteratorTokenseq,
643689
constJsonbValue*scalarVal)
644690
{

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