}
}/*end C constant imports*/
+ if( util.isMainWindow()
+ && 0!==capi.sqlite3_vfs_find("kvvfs") ){/* kvvfs-specific glue */
+ const kvvfsMethods = new capi.sqlite3_kvvfs_methods(
+ wasm.exports.sqlite3_wasm_kvvfs_methods()
+ );
+ delete capi.sqlite3_kvvfs_methods;
+
+ const kvvfsMakeKey = wasm.exports.sqlite3_wasm_kvvfsMakeKeyOnPstack,
+ pstack = wasm.pstack,
+ pAllocRaw = wasm.exports.sqlite3_wasm_pstack_alloc;
+
+ const kvvfsStorage = (zClass)=>
+ ((115/*=='s'*/===wasm.getMemValue(zClass))
+ ? sessionStorage : localStorage);
+
+ const kvvfsImpls = {
+ xRead: (zClass, zKey, zBuf, nBuf)=>{
+ const stack = pstack.pointer,
+ astack = wasm.scopedAllocPush();
+ try {
+ const zXKey = kvvfsMakeKey(zClass,zKey);
+ if(!zXKey) return -3/*OOM*/;
+ const jKey = wasm.cstringToJs(zXKey);
+ const jV = kvvfsStorage(zClass).getItem(jKey);
+ if(!jV) return -1;
+ const nV = jV.length /* Note that we are relying 100% on v being
+ ASCII so that jV.length is equal to the
+ C-string's byte length. */;
+ if(nBuf<=0) return nV;
+ else if(1===nBuf){
+ wasm.setMemValue(zBuf, 0);
+ return nV;
+ }
+ const zV = wasm.scopedAllocCString(jV);
+ if(nBuf > nV + 1) nBuf = nV + 1;
+ wasm.heap8u().copyWithin(zBuf, zV, zV + nBuf - 1);
+ wasm.setMemValue(zBuf + nBuf - 1, 0);
+ return nBuf - 1;
+ }catch(e){
+ console.error("kvstorageRead()",e);
+ return -2;
+ }finally{
+ pstack.restore(stack);
+ wasm.scopedAllocPop(astack);
+ }
+ },
+ xWrite: (zClass, zKey, zData)=>{
+ const stack = pstack.pointer;
+ try {
+ const zXKey = kvvfsMakeKey(zClass,zKey);
+ if(!zXKey) return 1/*OOM*/;
+ const jKey = wasm.cstringToJs(zXKey);
+ kvvfsStorage(zClass).setItem(jKey, wasm.cstringToJs(zData));
+ return 0;
+ }catch(e){
+ console.error("kvstorageWrite()",e);
+ return capi.SQLITE_IOERR;
+ }finally{
+ pstack.restore(stack);
+ }
+ },
+ xDelete: (zClass, zKey)=>{
+ const stack = pstack.pointer;
+ try {
+ const zXKey = kvvfsMakeKey(zClass,zKey);
+ if(!zXKey) return 1/*OOM*/;
+ kvvfsStorage(zClass).removeItem(wasm.cstringToJs(zXKey));
+ return 0;
+ }catch(e){
+ console.error("kvstorageDelete()",e);
+ return capi.SQLITE_IOERR;
+ }finally{
+ pstack.restore(stack);
+ }
+ }
+ }/*kvvfsImpls*/;
+ for(let k of Object.keys(kvvfsImpls)){
+ kvvfsMethods[kvvfsMethods.memberKey(k)] =
+ wasm.installFunction(
+ kvvfsMethods.memberSignature(k),
+ kvvfsImpls[k]
+ );
+ }
+ console.warn('kvvfs stuff',kvvfsMethods);
+ }/*kvvfs*/
+
sqlite3.version = Object.assign(Object.create(null),{
library: sqlite3.capi.sqlite3_libversion(),
sourceId: sqlite3.capi.sqlite3_sourceid()
// to resolve in order? We currently only have 1, so it
// makes no difference.
lip = lip.map((f)=>f(sqlite3).catch((e)=>{
- console.error("An async sqlite3 initializer failed:",e);
+ console.error("Ignoring error: an async sqlite3 initializer failed:",e);
}));
//let p = lip.shift();
//while(lip.length) p = p.then(lip.shift());
** emcc -o sqlite3.wasm ... -I/path/to/sqlite3-c-and-h sqlite3-wasm.c
*/
+#define SQLITE_WASM
+
/*
** Threading and file locking: JS is single-threaded. Each Worker
** thread is a separate instance of the JS engine so can never access
#endif
/*
-** WASM_KEEP is identical to EMSCRIPTEN_KEEPALIVE but is not
+** SQLITE_WASM_KEEP is identical to EMSCRIPTEN_KEEPALIVE but is not
** Emscripten-specific. It explicitly marks functions for export into
** the target wasm file without requiring explicit listing of those
** functions in Emscripten's -sEXPORTED_FUNCTIONS=... list (or
} _StructBinder;
#undef CurrentStruct
+#define CurrentStruct sqlite3_kvvfs_methods
+ StructBinder {
+ M(xRead,"i(sspi)");
+ M(xWrite,"i(sss)");
+ M(xDelete,"i(ss)");
+ M(nKeySize,"i");
+ } _StructBinder;
+
} out( "]"/*structs*/);
out("}"/*top-level object*/);
}
}
+/*
+** This function is NOT part of the sqlite3 public API. It is strictly
+** for use by the sqlite project's own JS/WASM bindings.
+**
+** Allocates sqlite3KvvfsMethods.nKeySize bytes from
+** sqlite3_wasm_pstack_alloc() and returns 0 if that allocation fails,
+** else it passes that string to kvstorageMakeKey() and returns a
+** NUL-terminated pointer to that string. It is up to the caller to
+** use sqlite3_wasm_pstack_restore() to free the returned pointer.
+*/
+WASM_KEEP
+char * sqlite3_wasm_kvvfsMakeKeyOnPstack(const char *zClass,
+ const char *zKeyIn){
+ assert(sqlite3KvvfsMethods.nKeySize>24);
+ char *zKeyOut =
+ (char *)sqlite3_wasm_pstack_alloc(sqlite3KvvfsMethods.nKeySize);
+ if(zKeyOut){
+ kvstorageMakeKey(zClass, zKeyIn, zKeyOut);
+ }
+ return zKeyOut;
+}
+
+/*
+** This function is NOT part of the sqlite3 public API. It is strictly
+** for use by the sqlite project's own JS/WASM bindings.
+**
+** Returns the pointer to the singleton object which holds the kvvfs
+** I/O methods and associated state.
+*/
+WASM_KEEP
+sqlite3_kvvfs_methods * sqlite3_wasm_kvvfs_methods(void){
+ return &sqlite3KvvfsMethods;
+}
#if defined(__EMSCRIPTEN__) && defined(SQLITE_WASM_WASMFS)
#include <emscripten/wasmfs.h>
-C Refactor\sos_kv.c\sso\sthat\sthe\skvvfs\sread/write/delete\smethods\scan\sbe\sswapped\sout\sat\sruntime\sby\sJS\simplementations.\sThis\seliminates\sthe\skvvfs\sdependency\son\sEmscripten.\sCheckin\spart\s1\sof\s2,\sto\saccount\sfor\scherrypicking.
-D 2022-10-09T13:19:27.791
+C Refactor\skvvfs\sJS\sbits\sto\smake\suse\sof\s[ea370b9b05f7ed7eaa].\sAt\smain-thread\sstartup,\sif\skvvfs\sis\savailable,\sreplace\sthe\skvvfs\sI/O\smethods\swith\sJS\simpls.\sCheckin\spart\s2\sof\s2,\sto\saccount\sfor\scherrypicking\s[ea370b9b05f7ed7eaa]\sinto\sthe\skv-vfs\sbranch.
+D 2022-10-09T13:26:15.854
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-F ext/wasm/api/sqlite3-wasm.c 0c8cb242b80b8de27b74f05ed781f427958e04c9339c4720f30c3a7e78ee6242
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U stephan
-Z 01e42f1c0aeb881a7fdcbb6522393054
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# Remove this line to create a well-formed Fossil manifest.
-ea370b9b05f7ed7eaa154ba58019f6642217eabc18517e721567adf948d93980
\ No newline at end of file
+a9047e020a097b2259bc9935b63ca1c538a3a7f1d050e15f0d0a08cfb84acc7c
\ No newline at end of file
projects / thirdparty / sqlite.git / commitdiff
