stephan
f79d277999
FossilOrigin-Name: ac876ab9913332c9a5e3045824bf92a2501707aecfb13906d5c280302d9878a9
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
#include "sqlite3.h"
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#include <stdlib.h> /*atexit()*/
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/*
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** 2022-06-25
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**
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** The author disclaims copyright to this source code. In place of a
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** legal notice, here is a blessing:
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**
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** * May you do good and not evil.
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** * May you find forgiveness for yourself and forgive others.
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** * May you share freely, never taking more than you give.
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**
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***********************************************************************
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**
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** Utility functions for use with the emscripten/WASM bits. These
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** functions ARE NOT part of the sqlite3 public API. They are strictly
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** for internal use by the JS/WASM bindings.
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**
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** This file is intended to be WASM-compiled together with sqlite3.c,
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** e.g.:
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**
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** emcc ... sqlite3.c wasm_util.c
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*/
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/** Result value of sqlite3_wasm_enum_json(). */
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static char * zWasmEnum = 0;
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/* atexit() handler to clean up any WASM-related state. */
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static void sqlite3_wasm_cleanup(void){
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free(zWasmEnum);
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}
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/*
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** Returns a string containing a JSON-format "enum" of C-level
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** constants intended to be imported into the JS environment. The JSON
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** is initialized the first time this function is called and that
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** result is reused for all future calls and cleaned up via atexit().
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** (If we didn't cache the result, it would be leaked by the JS glue
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** code on each call during the WASM-to-JS conversion.)
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**
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** This function is NOT part of the sqlite3 public API. It is strictly
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** for use by the JS/WASM bindings.
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*/
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const char * sqlite3_wasm_enum_json(void){
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sqlite3_str * s;
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if(zWasmEnum) return zWasmEnum;
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s = sqlite3_str_new(0);
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sqlite3_str_appendall(s, "{");
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#define SD_(X,S,FINAL) \
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sqlite3_str_appendf(s, "\"%s\": %d%s", S, (int)X, (FINAL ? "}" : ", "))
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#define SD(X) SD_(X,#X,0)
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#define SDFinal(X) SD_(X,#X,1)
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sqlite3_str_appendall(s,"\"resultCodes\": {");
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SD(SQLITE_OK);
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SD(SQLITE_ERROR);
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SD(SQLITE_INTERNAL);
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SD(SQLITE_PERM);
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SD(SQLITE_ABORT);
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SD(SQLITE_BUSY);
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SD(SQLITE_LOCKED);
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SD(SQLITE_NOMEM);
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SD(SQLITE_READONLY);
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SD(SQLITE_INTERRUPT);
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SD(SQLITE_IOERR);
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SD(SQLITE_CORRUPT);
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SD(SQLITE_NOTFOUND);
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SD(SQLITE_FULL);
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SD(SQLITE_CANTOPEN);
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SD(SQLITE_PROTOCOL);
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SD(SQLITE_EMPTY);
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SD(SQLITE_SCHEMA);
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SD(SQLITE_TOOBIG);
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SD(SQLITE_CONSTRAINT);
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SD(SQLITE_MISMATCH);
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SD(SQLITE_MISUSE);
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SD(SQLITE_NOLFS);
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SD(SQLITE_AUTH);
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SD(SQLITE_FORMAT);
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SD(SQLITE_RANGE);
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SD(SQLITE_NOTADB);
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SD(SQLITE_NOTICE);
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SD(SQLITE_WARNING);
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SD(SQLITE_ROW);
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SDFinal(SQLITE_DONE);
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sqlite3_str_appendall(s,",\"dataTypes\": {");
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SD(SQLITE_INTEGER);
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SD(SQLITE_FLOAT);
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SD(SQLITE_TEXT);
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SD(SQLITE_BLOB);
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SDFinal(SQLITE_NULL);
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sqlite3_str_appendf(s,",\"encodings\": {");
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SDFinal(SQLITE_UTF8);
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sqlite3_str_appendall(s,",\"blobFinalizers\": {");
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SD(SQLITE_STATIC);
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SDFinal(SQLITE_TRANSIENT);
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sqlite3_str_appendall(s,",\"udfFlags\": {");
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SD(SQLITE_DETERMINISTIC);
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SD(SQLITE_DIRECTONLY);
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SDFinal(SQLITE_INNOCUOUS);
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sqlite3_str_appendall(s,",\"openFlags\": {");
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/* Noting that not all of these will have any effect in WASM-space. */
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SD(SQLITE_OPEN_READONLY);
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SD(SQLITE_OPEN_READWRITE);
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SD(SQLITE_OPEN_CREATE);
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SD(SQLITE_OPEN_URI);
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SD(SQLITE_OPEN_MEMORY);
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SD(SQLITE_OPEN_NOMUTEX);
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SD(SQLITE_OPEN_FULLMUTEX);
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SD(SQLITE_OPEN_SHAREDCACHE);
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SD(SQLITE_OPEN_PRIVATECACHE);
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SD(SQLITE_OPEN_EXRESCODE);
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SDFinal(SQLITE_OPEN_NOFOLLOW);
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#undef SD_
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#undef SD
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#undef SDFinal
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sqlite3_str_appendall(s, "}");
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zWasmEnum = sqlite3_str_finish(s);
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atexit(sqlite3_wasm_cleanup);
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return zWasmEnum;
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}
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