Add the SQLITE_TESTCTRL_PRNG_SEED test control.

FossilOrigin-Name: 3ac5723164ae801e209ce525a5d94692767136f9d06be2a84883dcea677d02da

1 files changed, 9 insertions, 1 deletions

diff --git a/src/os.c b/src/os.c
index 54b7fcfb2..08701028b 100644
--- a/src/os.c
+++ b/src/os.c
@@ -258,7 +258,15 @@ void sqlite3OsDlClose(sqlite3_vfs *pVfs, void *pHandle){
 }
 #endif /* SQLITE_OMIT_LOAD_EXTENSION */
 int sqlite3OsRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
-  return pVfs->xRandomness(pVfs, nByte, zBufOut);
+  if( sqlite3Config.iPrngSeed ){
+    memset(zBufOut, 0, nByte);
+    if( nByte>sizeof(unsigned) ) nByte = sizeof(unsigned int);
+    memcpy(zBufOut, &sqlite3Config.iPrngSeed, nByte);
+    return SQLITE_OK;
+  }else{
+    return pVfs->xRandomness(pVfs, nByte, zBufOut);
+  }
+  
 }
 int sqlite3OsSleep(sqlite3_vfs *pVfs, int nMicro){
   return pVfs->xSleep(pVfs, nMicro);