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Enhance the (undocumented, debug-only) json_parse() SQL function so that it

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returns the text rendering of the JSONB parse of the input, rather than printing
the rendering on stdout.

FossilOrigin-Name: 056de8d551dcbdf1d162e2db15ed418fa9c786f900cd3972ef8a1dea3f4f3aa1
This commit is contained in:
drh
2023-12-28 16:21:22 +00:00
parent d9ac37fc44
commit 0546a284fa
3 changed files with 54 additions and 38 deletions
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76
src/json.c
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@@ -3351,14 +3351,15 @@ static void jsonDebugPrintBlob(
JsonParse *pParse, /* JSON content */
u32 iStart, /* Start rendering here */
u32 iEnd, /* Do not render this byte or any byte after this one */
int nIndent /* Indent by this many spaces */
int nIndent, /* Indent by this many spaces */
sqlite3_str *pOut /* Generate output into this sqlite3_str object */
){
while( iStart<iEnd ){
u32 i, n, nn, sz = 0;
int showContent = 1;
u8 x = pParse->aBlob[iStart] & 0x0f;
u32 savedNBlob = pParse->nBlob;
printf("%5d:%*s", iStart, nIndent, "");
sqlite3_str_appendf(pOut, "%5d:%*s", iStart, nIndent, "");
if( pParse->nBlobAlloc>pParse->nBlob ){
pParse->nBlob = pParse->nBlobAlloc;
}
@@ -3367,9 +3368,11 @@ static void jsonDebugPrintBlob(
if( sz>0 && x<JSONB_ARRAY ){
nn += sz;
}
for(i=0; i<nn; i++) printf(" %02x", pParse->aBlob[iStart+i]);
for(i=0; i<nn; i++){
sqlite3_str_appendf(pOut, " %02x", pParse->aBlob[iStart+i]);
}
if( n==0 ){
printf(" ERROR invalid node size\n");
sqlite3_str_appendf(pOut, " ERROR invalid node size\n");
iStart = n==0 ? iStart+1 : iEnd;
continue;
}
@@ -3384,55 +3387,57 @@ static void jsonDebugPrintBlob(
}
}
}
printf(" <-- ");
sqlite3_str_appendall(pOut," <-- ");
switch( x ){
case JSONB_NULL: printf("null"); break;
case JSONB_TRUE: printf("true"); break;
case JSONB_FALSE: printf("false"); break;
case JSONB_INT: printf("int"); break;
case JSONB_INT5: printf("int5"); break;
case JSONB_FLOAT: printf("float"); break;
case JSONB_FLOAT5: printf("float5"); break;
case JSONB_TEXT: printf("text"); break;
case JSONB_TEXTJ: printf("textj"); break;
case JSONB_TEXT5: printf("text5"); break;
case JSONB_TEXTRAW: printf("textraw"); break;
case JSONB_NULL: sqlite3_str_appendall(pOut,"null"); break;
case JSONB_TRUE: sqlite3_str_appendall(pOut,"true"); break;
case JSONB_FALSE: sqlite3_str_appendall(pOut,"false"); break;
case JSONB_INT: sqlite3_str_appendall(pOut,"int"); break;
case JSONB_INT5: sqlite3_str_appendall(pOut,"int5"); break;
case JSONB_FLOAT: sqlite3_str_appendall(pOut,"float"); break;
case JSONB_FLOAT5: sqlite3_str_appendall(pOut,"float5"); break;
case JSONB_TEXT: sqlite3_str_appendall(pOut,"text"); break;
case JSONB_TEXTJ: sqlite3_str_appendall(pOut,"textj"); break;
case JSONB_TEXT5: sqlite3_str_appendall(pOut,"text5"); break;
case JSONB_TEXTRAW: sqlite3_str_appendall(pOut,"textraw"); break;
case JSONB_ARRAY: {
printf("array, %u bytes\n", sz);
jsonDebugPrintBlob(pParse, iStart+n, iStart+n+sz, nIndent+2);
sqlite3_str_appendf(pOut,"array, %u bytes\n", sz);
jsonDebugPrintBlob(pParse, iStart+n, iStart+n+sz, nIndent+2, pOut);
showContent = 0;
break;
}
case JSONB_OBJECT: {
printf("object, %u bytes\n", sz);
jsonDebugPrintBlob(pParse, iStart+n, iStart+n+sz, nIndent+2);
sqlite3_str_appendf(pOut, "object, %u bytes\n", sz);
jsonDebugPrintBlob(pParse, iStart+n, iStart+n+sz, nIndent+2, pOut);
showContent = 0;
break;
}
default: {
printf("ERROR: unknown node type\n");
sqlite3_str_appendall(pOut, "ERROR: unknown node type\n");
showContent = 0;
break;
}
}
if( showContent ){
if( sz==0 && x<=JSONB_FALSE ){
printf("\n");
sqlite3_str_append(pOut, "\n", 1);
}else{
u32 i;
printf(": \"");
sqlite3_str_appendall(pOut, ": \"");
for(i=iStart+n; i<iStart+n+sz; i++){
u8 c = pParse->aBlob[i];
if( c<0x20 || c>=0x7f ) c = '.';
putchar(c);
sqlite3_str_append(pOut, (char*)&c, 1);
}
printf("\"\n");
sqlite3_str_append(pOut, "\"\n", 2);
}
}
iStart += n + sz;
}
}
static void jsonShowParse(JsonParse *pParse){
sqlite3_str out;
char zBuf[1000];
if( pParse==0 ){
printf("NULL pointer\n");
return;
@@ -3443,7 +3448,10 @@ static void jsonShowParse(JsonParse *pParse){
if( pParse->nBlob==0 ) return;
printf("content (bytes 0..%u):\n", pParse->nBlob-1);
}
jsonDebugPrintBlob(pParse, 0, pParse->nBlob, 0);
sqlite3StrAccumInit(&out, 0, zBuf, sizeof(zBuf), 1000000);
jsonDebugPrintBlob(pParse, 0, pParse->nBlob, 0, &out);
printf("%s", sqlite3_str_value(&out));
sqlite3_str_reset(&out);
}
#endif /* SQLITE_DEBUG */
@@ -3451,8 +3459,8 @@ static void jsonShowParse(JsonParse *pParse){
/*
** SQL function: json_parse(JSON)
**
** Parse JSON using jsonParseFuncArg(). Then print a dump of that
** parse on standard output.
** Parse JSON using jsonParseFuncArg(). Return text that is a
** human-readable dump of the binary JSONB for the input parameter.
*/
static void jsonParseFunc(
sqlite3_context *ctx,
@@ -3460,10 +3468,18 @@ static void jsonParseFunc(
sqlite3_value **argv
){
JsonParse *p; /* The parse */
sqlite3_str out;
assert( argc==1 );
assert( argc>=1 );
sqlite3StrAccumInit(&out, 0, 0, 0, 1000000);
p = jsonParseFuncArg(ctx, argv[0], 0);
jsonShowParse(p);
if( p==0 ) return;
if( argc==1 ){
jsonDebugPrintBlob(p, 0, p->nBlob, 0, &out);
sqlite3_result_text64(ctx, out.zText, out.nChar, sqlite3_free, SQLITE_UTF8);
}else{
jsonShowParse(p);
}
jsonParseFree(p);
}
#endif /* SQLITE_DEBUG */