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-rw-r--r--src/json.c238
1 files changed, 201 insertions, 37 deletions
diff --git a/src/json.c b/src/json.c
index 5bfa869..4db468c 100644
--- a/src/json.c
+++ b/src/json.c
@@ -563,7 +563,6 @@ static void jsonAppendRawNZ(JsonString *p, const char *zIn, u32 N){
}
}
-
/* Append formatted text (not to exceed N bytes) to the JsonString.
*/
static void jsonPrintf(int N, JsonString *p, const char *zFormat, ...){
@@ -621,6 +620,40 @@ static void jsonAppendSeparator(JsonString *p){
jsonAppendChar(p, ',');
}
+/* c is a control character. Append the canonical JSON representation
+** of that control character to p.
+**
+** This routine assumes that the output buffer has already been enlarged
+** sufficiently to hold the worst-case encoding plus a nul terminator.
+*/
+static void jsonAppendControlChar(JsonString *p, u8 c){
+ static const char aSpecial[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 'b', 't', 'n', 0, 'f', 'r', 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ assert( sizeof(aSpecial)==32 );
+ assert( aSpecial['\b']=='b' );
+ assert( aSpecial['\f']=='f' );
+ assert( aSpecial['\n']=='n' );
+ assert( aSpecial['\r']=='r' );
+ assert( aSpecial['\t']=='t' );
+ assert( c>=0 && c<sizeof(aSpecial) );
+ assert( p->nUsed+7 <= p->nAlloc );
+ if( aSpecial[c] ){
+ p->zBuf[p->nUsed] = '\\';
+ p->zBuf[p->nUsed+1] = aSpecial[c];
+ p->nUsed += 2;
+ }else{
+ p->zBuf[p->nUsed] = '\\';
+ p->zBuf[p->nUsed+1] = 'u';
+ p->zBuf[p->nUsed+2] = '0';
+ p->zBuf[p->nUsed+3] = '0';
+ p->zBuf[p->nUsed+4] = "0123456789abcdef"[c>>4];
+ p->zBuf[p->nUsed+5] = "0123456789abcdef"[c&0xf];
+ p->nUsed += 6;
+ }
+}
+
/* Append the N-byte string in zIn to the end of the JsonString string
** under construction. Enclose the string in double-quotes ("...") and
** escape any double-quotes or backslash characters contained within the
@@ -680,35 +713,14 @@ static void jsonAppendString(JsonString *p, const char *zIn, u32 N){
}
c = z[0];
if( c=='"' || c=='\\' ){
- json_simple_escape:
if( (p->nUsed+N+3 > p->nAlloc) && jsonStringGrow(p,N+3)!=0 ) return;
p->zBuf[p->nUsed++] = '\\';
p->zBuf[p->nUsed++] = c;
}else if( c=='\'' ){
p->zBuf[p->nUsed++] = c;
}else{
- static const char aSpecial[] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 'b', 't', 'n', 0, 'f', 'r', 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- assert( sizeof(aSpecial)==32 );
- assert( aSpecial['\b']=='b' );
- assert( aSpecial['\f']=='f' );
- assert( aSpecial['\n']=='n' );
- assert( aSpecial['\r']=='r' );
- assert( aSpecial['\t']=='t' );
- assert( c>=0 && c<sizeof(aSpecial) );
- if( aSpecial[c] ){
- c = aSpecial[c];
- goto json_simple_escape;
- }
if( (p->nUsed+N+7 > p->nAlloc) && jsonStringGrow(p,N+7)!=0 ) return;
- p->zBuf[p->nUsed++] = '\\';
- p->zBuf[p->nUsed++] = 'u';
- p->zBuf[p->nUsed++] = '0';
- p->zBuf[p->nUsed++] = '0';
- p->zBuf[p->nUsed++] = "0123456789abcdef"[c>>4];
- p->zBuf[p->nUsed++] = "0123456789abcdef"[c&0xf];
+ jsonAppendControlChar(p, c);
}
z++;
N--;
@@ -1409,7 +1421,10 @@ static u32 jsonbValidityCheck(
if( !jsonIsOk[z[j]] && z[j]!='\'' ){
if( z[j]=='"' ){
if( x==JSONB_TEXTJ ) return j+1;
- }else if( z[j]!='\\' || j+1>=k ){
+ }else if( z[j]<=0x1f ){
+ /* Control characters in JSON5 string literals are ok */
+ if( x==JSONB_TEXTJ ) return j+1;
+ }else if( NEVER(z[j]!='\\') || j+1>=k ){
return j+1;
}else if( strchr("\"\\/bfnrt",z[j+1])!=0 ){
j++;
@@ -1704,9 +1719,14 @@ json_parse_restart:
return -1;
}
}else if( c<=0x1f ){
- /* Control characters are not allowed in strings */
- pParse->iErr = j;
- return -1;
+ if( c==0 ){
+ pParse->iErr = j;
+ return -1;
+ }
+ /* Control characters are not allowed in canonical JSON string
+ ** literals, but are allowed in JSON5 string literals. */
+ opcode = JSONB_TEXT5;
+ pParse->hasNonstd = 1;
}else if( c=='"' ){
opcode = JSONB_TEXT5;
}
@@ -1922,6 +1942,7 @@ json_parse_restart:
return i+4;
}
/* fall-through into the default case that checks for NaN */
+ /* no break */ deliberate_fall_through
}
default: {
u32 k;
@@ -2190,7 +2211,7 @@ static u32 jsonTranslateBlobToText(
zIn = (const char*)&pParse->aBlob[i+n];
jsonAppendChar(pOut, '"');
while( sz2>0 ){
- for(k=0; k<sz2 && zIn[k]!='\\' && zIn[k]!='"'; k++){}
+ for(k=0; k<sz2 && (jsonIsOk[(u8)zIn[k]] || zIn[k]=='\''); k++){}
if( k>0 ){
jsonAppendRawNZ(pOut, zIn, k);
if( k>=sz2 ){
@@ -2205,6 +2226,13 @@ static u32 jsonTranslateBlobToText(
sz2--;
continue;
}
+ if( zIn[0]<=0x1f ){
+ if( pOut->nUsed+7>pOut->nAlloc && jsonStringGrow(pOut,7) ) break;
+ jsonAppendControlChar(pOut, zIn[0]);
+ zIn++;
+ sz2--;
+ continue;
+ }
assert( zIn[0]=='\\' );
assert( sz2>=1 );
if( sz2<2 ){
@@ -2307,6 +2335,112 @@ static u32 jsonTranslateBlobToText(
return i+n+sz;
}
+/* Context for recursion of json_pretty()
+*/
+typedef struct JsonPretty JsonPretty;
+struct JsonPretty {
+ JsonParse *pParse; /* The BLOB being rendered */
+ JsonString *pOut; /* Generate pretty output into this string */
+ const char *zIndent; /* Use this text for indentation */
+ u32 szIndent; /* Bytes in zIndent[] */
+ u32 nIndent; /* Current level of indentation */
+};
+
+/* Append indentation to the pretty JSON under construction */
+static void jsonPrettyIndent(JsonPretty *pPretty){
+ u32 jj;
+ for(jj=0; jj<pPretty->nIndent; jj++){
+ jsonAppendRaw(pPretty->pOut, pPretty->zIndent, pPretty->szIndent);
+ }
+}
+
+/*
+** Translate the binary JSONB representation of JSON beginning at
+** pParse->aBlob[i] into a JSON text string. Append the JSON
+** text onto the end of pOut. Return the index in pParse->aBlob[]
+** of the first byte past the end of the element that is translated.
+**
+** This is a variant of jsonTranslateBlobToText() that "pretty-prints"
+** the output. Extra whitespace is inserted to make the JSON easier
+** for humans to read.
+**
+** If an error is detected in the BLOB input, the pOut->eErr flag
+** might get set to JSTRING_MALFORMED. But not all BLOB input errors
+** are detected. So a malformed JSONB input might either result
+** in an error, or in incorrect JSON.
+**
+** The pOut->eErr JSTRING_OOM flag is set on a OOM.
+*/
+static u32 jsonTranslateBlobToPrettyText(
+ JsonPretty *pPretty, /* Pretty-printing context */
+ u32 i /* Start rendering at this index */
+){
+ u32 sz, n, j, iEnd;
+ const JsonParse *pParse = pPretty->pParse;
+ JsonString *pOut = pPretty->pOut;
+ n = jsonbPayloadSize(pParse, i, &sz);
+ if( n==0 ){
+ pOut->eErr |= JSTRING_MALFORMED;
+ return pParse->nBlob+1;
+ }
+ switch( pParse->aBlob[i] & 0x0f ){
+ case JSONB_ARRAY: {
+ j = i+n;
+ iEnd = j+sz;
+ jsonAppendChar(pOut, '[');
+ if( j<iEnd ){
+ jsonAppendChar(pOut, '\n');
+ pPretty->nIndent++;
+ while( pOut->eErr==0 ){
+ jsonPrettyIndent(pPretty);
+ j = jsonTranslateBlobToPrettyText(pPretty, j);
+ if( j>=iEnd ) break;
+ jsonAppendRawNZ(pOut, ",\n", 2);
+ }
+ jsonAppendChar(pOut, '\n');
+ pPretty->nIndent--;
+ jsonPrettyIndent(pPretty);
+ }
+ jsonAppendChar(pOut, ']');
+ i = iEnd;
+ break;
+ }
+ case JSONB_OBJECT: {
+ j = i+n;
+ iEnd = j+sz;
+ jsonAppendChar(pOut, '{');
+ if( j<iEnd ){
+ jsonAppendChar(pOut, '\n');
+ pPretty->nIndent++;
+ while( pOut->eErr==0 ){
+ jsonPrettyIndent(pPretty);
+ j = jsonTranslateBlobToText(pParse, j, pOut);
+ if( j>iEnd ){
+ pOut->eErr |= JSTRING_MALFORMED;
+ break;
+ }
+ jsonAppendRawNZ(pOut, ": ", 2);
+ j = jsonTranslateBlobToPrettyText(pPretty, j);
+ if( j>=iEnd ) break;
+ jsonAppendRawNZ(pOut, ",\n", 2);
+ }
+ jsonAppendChar(pOut, '\n');
+ pPretty->nIndent--;
+ jsonPrettyIndent(pPretty);
+ }
+ jsonAppendChar(pOut, '}');
+ i = iEnd;
+ break;
+ }
+ default: {
+ i = jsonTranslateBlobToText(pParse, i, pOut);
+ break;
+ }
+ }
+ return i;
+}
+
+
/* Return true if the input pJson
**
** For performance reasons, this routine does not do a detailed check of the
@@ -3557,11 +3691,12 @@ static void jsonParseFunc(
if( p==0 ) return;
if( argc==1 ){
jsonDebugPrintBlob(p, 0, p->nBlob, 0, &out);
- sqlite3_result_text64(ctx, out.zText, out.nChar, SQLITE_DYNAMIC, SQLITE_UTF8);
+ sqlite3_result_text64(ctx,out.zText,out.nChar,SQLITE_TRANSIENT,SQLITE_UTF8);
}else{
jsonShowParse(p);
}
jsonParseFree(p);
+ sqlite3_str_reset(&out);
}
#endif /* SQLITE_DEBUG */
@@ -3660,13 +3795,6 @@ static void jsonArrayLengthFunc(
jsonParseFree(p);
}
-/* True if the string is all digits */
-static int jsonAllDigits(const char *z, int n){
- int i;
- for(i=0; i<n && sqlite3Isdigit(z[i]); i++){}
- return i==n;
-}
-
/* True if the string is all alphanumerics and underscores */
static int jsonAllAlphanum(const char *z, int n){
int i;
@@ -3731,7 +3859,7 @@ static void jsonExtractFunc(
** [NUMBER] ==> $[NUMBER] // Not PG. Purely for convenience
*/
jsonStringInit(&jx, ctx);
- if( jsonAllDigits(zPath, nPath) ){
+ if( sqlite3_value_type(argv[i])==SQLITE_INTEGER ){
jsonAppendRawNZ(&jx, "[", 1);
jsonAppendRaw(&jx, zPath, nPath);
jsonAppendRawNZ(&jx, "]", 2);
@@ -4226,6 +4354,40 @@ json_type_done:
}
/*
+** json_pretty(JSON)
+** json_pretty(JSON, INDENT)
+**
+** Return text that is a pretty-printed rendering of the input JSON.
+** If the argument is not valid JSON, return NULL.
+**
+** The INDENT argument is text that is used for indentation. If omitted,
+** it defaults to four spaces (the same as PostgreSQL).
+*/
+static void jsonPrettyFunc(
+ sqlite3_context *ctx,
+ int argc,
+ sqlite3_value **argv
+){
+ JsonString s; /* The output string */
+ JsonPretty x; /* Pretty printing context */
+
+ memset(&x, 0, sizeof(x));
+ x.pParse = jsonParseFuncArg(ctx, argv[0], 0);
+ if( x.pParse==0 ) return;
+ x.pOut = &s;
+ jsonStringInit(&s, ctx);
+ if( argc==1 || (x.zIndent = (const char*)sqlite3_value_text(argv[1]))==0 ){
+ x.zIndent = " ";
+ x.szIndent = 4;
+ }else{
+ x.szIndent = (u32)strlen(x.zIndent);
+ }
+ jsonTranslateBlobToPrettyText(&x, 0);
+ jsonReturnString(&s, 0, 0);
+ jsonParseFree(x.pParse);
+}
+
+/*
** json_valid(JSON)
** json_valid(JSON, FLAGS)
**
@@ -5239,6 +5401,8 @@ void sqlite3RegisterJsonFunctions(void){
JFUNCTION(jsonb_object, -1,0,1, 1,1,0, jsonObjectFunc),
JFUNCTION(json_patch, 2,1,1, 0,0,0, jsonPatchFunc),
JFUNCTION(jsonb_patch, 2,1,0, 0,1,0, jsonPatchFunc),
+ JFUNCTION(json_pretty, 1,1,0, 0,0,0, jsonPrettyFunc),
+ JFUNCTION(json_pretty, 2,1,0, 0,0,0, jsonPrettyFunc),
JFUNCTION(json_quote, 1,0,1, 1,0,0, jsonQuoteFunc),
JFUNCTION(json_remove, -1,1,1, 0,0,0, jsonRemoveFunc),
JFUNCTION(jsonb_remove, -1,1,0, 0,1,0, jsonRemoveFunc),
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-25 18:15:10 +0000