Consolidate/unify how the JS bindings of the create_function/collation family of functions react to a non-UTF8 encoding: they now treat a falsy value as SQLITE_UTF8 and fail with SQLITE_FORMAT for an invalid encoding.

FossilOrigin-Name: deffe6fb211410fa1a1fbca824a52b4e09b54d4b4f4a4e12d71c9e4b7e8606fb

ext/wasm/api/sqlite3-api-glue.js

@@ -460,6 +460,15 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
                                               (1===n?"":'s')+".");
   };
 
+  /** Code duplication reducer for functions which take an encoding
+      argument and require SQLITE_UTF8.  Sets the db error code to
+      SQLITE_FORMAT and returns that code. */
+  const __errEncoding = (pDb)=>{
+    return util.sqlite3_wasm_db_error(
+      pDb, capi.SQLITE_FORMAT, "SQLITE_UTF8 is the only supported encoding."
+    );
+  };
+
   if(1){/* Bindings for sqlite3_create_collation() */
 
     const __collationContextKey = (argIndex,argv)=>{
@@ -495,7 +504,8 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
           them.
 
        2) It returns capi.SQLITE_FORMAT if the 3rd argument is not
-          capi.SQLITE_UTF8. No other encodings are supported.
+          capi.SQLITE_UTF8. No other encodings are supported. To simplify
+          usage, any falsy value of eTextRep is treated as SQLITE_UTF8.
 
        Returns 0 on success, non-0 on error, in which case the error
        state of pDb (of type `sqlite3*` or argument-convertible to it)
@@ -503,10 +513,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     */
     capi.sqlite3_create_collation_v2 = function(pDb,zName,eTextRep,pArg,xCompare,xDestroy){
       if(6!==arguments.length) return __dbArgcMismatch(pDb, 'sqlite3_create_collation_v2', 6);
-      else if(capi.SQLITE_UTF8!==eTextRep){
-        return util.sqlite3_wasm_db_error(
-          pDb, capi.SQLITE_FORMAT, "SQLITE_UTF8 is the only supported encoding."
-        );
+      else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       let rc, pfCompare, pfDestroy;
      try{
@@ -580,6 +590,7 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
        "int"/*eTextRep*/, "*"/*pApp*/,
        "*"/*xStep*/,"*"/*xFinal*/, "*"/*xValue*/, "*"/*xDestroy*/]
     );
+    // TODO: reimplement these using FuncPtrAdapter.
     const sqlite3CreateWindowFunction = wasm.xWrap(
       "sqlite3_create_window_function", "int",
       ["sqlite3*", "string"/*funcName*/, "int"/*nArg*/,
@@ -657,6 +668,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     ){
       if(f.length!==arguments.length){
         return __dbArgcMismatch(pDb,"sqlite3_create_function_v2",f.length);
+      }else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       /* Wrap the callbacks in a WASM-bound functions... */
       const uninstall = [/*funcs to uninstall on error*/];
@@ -698,6 +713,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     ){
       if(f.length!==arguments.length){
         return __dbArgcMismatch(pDb,"sqlite3_create_window_function",f.length);
+      }else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       /* Wrap the callbacks in a WASM-bound functions... */
       const uninstall = [/*funcs to uninstall on error*/];

ext/wasm/tester1.c-pp.js

@@ -1650,6 +1650,19 @@ self.sqlite3InitModule = sqlite3InitModule;
           assert(2 === blobRc.length);
         //debug("blobRc=",blobRc);
         T.assert(0x68==blobRc[0] && 0x69==blobRc[1]);
+
+        let rc = sqlite3.capi.sqlite3_create_function_v2(
+          this.db, "foo", 0, -1, 0, 0, 0, 0, 0
+        );
+        T.assert(
+          sqlite3.capi.SQLITE_FORMAT === rc,
+          "For invalid eTextRep argument."
+        );
+        rc = sqlite3.capi.sqlite3_create_function_v2(this.db, "foo", 0);
+        T.assert(
+          sqlite3.capi.SQLITE_MISUSE === rc,
+          "For invalid arg count."
+        );
       }
     })
 
@@ -2333,7 +2346,7 @@ self.sqlite3InitModule = sqlite3InitModule;
       T.assert(0===rc).assert(3===collationCounter);
       rc = capi.sqlite3_create_collation(this.db,"hi",capi.SQLITE_UTF8/*not enough args*/);
       T.assert(capi.SQLITE_MISUSE === rc);
-      rc = capi.sqlite3_create_collation_v2(this.db,"hi",0/*wrong encoding*/,0,0,0);
+      rc = capi.sqlite3_create_collation_v2(this.db,"hi",capi.SQLITE_UTF8+1/*invalid encoding*/,0,0,0);
       T.assert(capi.SQLITE_FORMAT === rc)
         .mustThrowMatching(()=>this.db.checkRc(rc),
                            /SQLITE_UTF8 is the only supported encoding./);

manifest

@@ -1,5 +1,5 @@
-C Add\sbase64()\sand\sbase85()\sto\sshell\ssources\sfor\sthe\snon-configured\smakefiles,\stoo.
-D 2022-12-23T19:11:57.957
+C Consolidate/unify\show\sthe\sJS\sbindings\sof\sthe\screate_function/collation\sfamily\sof\sfunctions\sreact\sto\sa\snon-UTF8\sencoding:\sthey\snow\streat\sa\sfalsy\svalue\sas\sSQLITE_UTF8\sand\sfail\swith\sSQLITE_FORMAT\sfor\san\sinvalid\sencoding.
+D 2022-12-23T19:16:45.370
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 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
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+deffe6fb211410fa1a1fbca824a52b4e09b54d4b4f4a4e12d71c9e4b7e8606fb