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Overview
| Comment: | Another (smaller) performance optimization for the JSON parser. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
c43daa8c78df99f62dd4d3c83708a3a8 |
| User & Date: | drh 2015-09-24 01:40:45 |
Context
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2015-09-24
| ||
| 11:06 | Fix a JSON1 test case so that it works on builds that omit virtual tables. check-in: a4444c0f user: drh tags: trunk | |
| 01:40 | Another (smaller) performance optimization for the JSON parser. check-in: c43daa8c user: drh tags: trunk | |
| 01:06 | Performance optimizations on the JSON parser. check-in: 7dd4b07a user: drh tags: trunk | |
Changes
Changes to ext/misc/json1.c.
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static int jsonParseValue(JsonParse *pParse, u32 i){
char c;
u32 j;
int iThis;
int x;
JsonNode *pNode;
while( safe_isspace(pParse->zJson[i]) ){ i++; }
if( (c = pParse->zJson[i])==0 ) return 0;
if( c=='{' ){
/* Parse object */
iThis = jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
................................................................................
jsonParseAddNode(pParse, seenDP ? JSON_REAL : JSON_INT,
j - i, &pParse->zJson[i]);
return j;
}else if( c=='}' ){
return -2; /* End of {...} */
}else if( c==']' ){
return -3; /* End of [...] */
}else{
return -1; /* Syntax error */
}
}
/*
** Parse a complete JSON string. Return 0 on success or non-zero if there
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static int jsonParseValue(JsonParse *pParse, u32 i){
char c;
u32 j;
int iThis;
int x;
JsonNode *pNode;
while( safe_isspace(pParse->zJson[i]) ){ i++; }
if( (c = pParse->zJson[i])=='{' ){
/* Parse object */
iThis = jsonParseAddNode(pParse, JSON_OBJECT, 0, 0);
if( iThis<0 ) return -1;
for(j=i+1;;j++){
while( safe_isspace(pParse->zJson[j]) ){ j++; }
x = jsonParseValue(pParse, j);
if( x<0 ){
................................................................................
jsonParseAddNode(pParse, seenDP ? JSON_REAL : JSON_INT,
j - i, &pParse->zJson[i]);
return j;
}else if( c=='}' ){
return -2; /* End of {...} */
}else if( c==']' ){
return -3; /* End of [...] */
}else if( c==0 ){
return 0; /* End of file */
}else{
return -1; /* Syntax error */
}
}
/*
** Parse a complete JSON string. Return 0 on success or non-zero if there
|