1 files changed, 21 insertions, 27 deletions

diff --git a/chromium/third_party/sqlite/patched/ext/fts3/fts3.c b/chromium/third_party/sqlite/patched/ext/fts3/fts3.c
index 8d48f22fec2..5cef6aa2370 100644
--- a/chromium/third_party/sqlite/patched/ext/fts3/fts3.c
+++ b/chromium/third_party/sqlite/patched/ext/fts3/fts3.c
@@ -308,18 +308,6 @@
   SQLITE_EXTENSION_INIT1
 #endif
 
-/*
-** The following are copied from sqliteInt.h.
-**
-** Constants for the largest and smallest possible 64-bit signed integers.
-** These macros are designed to work correctly on both 32-bit and 64-bit
-** compilers.
-*/
-#ifndef SQLITE_AMALGAMATION
-# define LARGEST_INT64  (0xffffffff|(((sqlite3_int64)0x7fffffff)<<32))
-# define SMALLEST_INT64 (((sqlite3_int64)-1) - LARGEST_INT64)
-#endif
-
 static int fts3EvalNext(Fts3Cursor *pCsr);
 static int fts3EvalStart(Fts3Cursor *pCsr);
 static int fts3TermSegReaderCursor(
@@ -364,12 +352,7 @@ int sqlite3Fts3PutVarint(char *p, sqlite_int64 v){
   v = (*ptr++);                                               \
   if( (v & mask2)==0 ){ var = v; return ret; }
 
-/*
-** Read a 64-bit variable-length integer from memory starting at p[0].
-** Return the number of bytes read, or 0 on error.
-** The value is stored in *v.
-*/
-int sqlite3Fts3GetVarint(const char *pBuf, sqlite_int64 *v){
+int sqlite3Fts3GetVarintU(const char *pBuf, sqlite_uint64 *v){
   const unsigned char *p = (const unsigned char*)pBuf;
   const unsigned char *pStart = p;
   u32 a;
@@ -392,6 +375,15 @@ int sqlite3Fts3GetVarint(const char *pBuf, sqlite_int64 *v){
 }
 
 /*
+** Read a 64-bit variable-length integer from memory starting at p[0].
+** Return the number of bytes read, or 0 on error.
+** The value is stored in *v.
+*/
+int sqlite3Fts3GetVarint(const char *pBuf, sqlite_int64 *v){
+  return sqlite3Fts3GetVarintU(pBuf, (sqlite3_uint64*)v);
+}
+
+/*
 ** Read a 64-bit variable-length integer from memory starting at p[0] and
 ** not extending past pEnd[-1].
 ** Return the number of bytes read, or 0 on error.
@@ -2484,12 +2476,12 @@ static void fts3GetDeltaVarint3(
   if( *pp>=pEnd ){
     *pp = 0;
   }else{
-    sqlite3_int64 iVal;
-    *pp += sqlite3Fts3GetVarint(*pp, &iVal);
+    u64 iVal;
+    *pp += sqlite3Fts3GetVarintU(*pp, &iVal);
     if( bDescIdx ){
-      *pVal -= iVal;
+      *pVal = (i64)((u64)*pVal - iVal);
     }else{
-      *pVal += iVal;
+      *pVal = (i64)((u64)*pVal + iVal);
     }
   }
 }
@@ -2518,9 +2510,9 @@ static void fts3PutDeltaVarint3(
 ){
   sqlite3_int64 iWrite;
   if( bDescIdx==0 || *pbFirst==0 ){
-    iWrite = iVal - *piPrev;
+    iWrite = (u64)iVal - (u64)*piPrev;
   }else{
-    iWrite = *piPrev - iVal;
+    iWrite = (u64)*piPrev - (u64)iVal;
   }
   assert( *pbFirst || *piPrev==0 );
   assert_fts3_nc( *pbFirst==0 || iWrite>0 );
@@ -2540,7 +2532,8 @@ static void fts3PutDeltaVarint3(
 ** Using this makes it easier to write code that can merge doclists that are
 ** sorted in either ascending or descending order.
 */
-#define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i1-i2))
+// #define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i64)((u64)i1-i2))
+#define DOCID_CMP(i1, i2) ((bDescDoclist?-1:1) * (i1>i2?1:((i1==i2)?0:-1)))
 
 /*
 ** This function does an "OR" merge of two doclists (output contains all
@@ -4514,15 +4507,16 @@ static void fts3EvalDlPhraseNext(
   u8 *pbEof
 ){
   char *pIter;                            /* Used to iterate through aAll */
-  char *pEnd = &pDL->aAll[pDL->nAll];     /* 1 byte past end of aAll */
+  char *pEnd;                             /* 1 byte past end of aAll */
 
   if( pDL->pNextDocid ){
     pIter = pDL->pNextDocid;
+    assert( pDL->aAll!=0 || pIter==0 );
   }else{
     pIter = pDL->aAll;
   }
 
-  if( pIter>=pEnd ){
+  if( pIter==0 || pIter>=(pEnd = pDL->aAll + pDL->nAll) ){
     /* We have already reached the end of this doclist. EOF. */
     *pbEof = 1;
   }else{