[sql] Import SQLite 3.17.0.

third_party/sqlite/patches/0013-backport-Fix-buffer-overrun-in-ICU-extension-s-casem.patch

-From 0d13e8740021aeeb849662f03f49720287cabe0c Mon Sep 17 00:00:00 2001
-From: Scott Hess <shess@chromium.org>
-Date: Fri, 26 Feb 2016 10:49:33 -0800
-Subject: [PATCH 13/13] [backport] Fix buffer overrun in ICU extension's
- casemap functions.
-
-Original Chromium CL at https://codereview.chromium.org/1704103002
-
-"Fix sqlite3's handling of casemapping result 3 times as long as input"
-
-SQLite interpretation at http://www.sqlite.org/src/info/b8dc1b9f5d413000
-
-"Fix a potential buffer overflow in the ICU upper() function."
-
-BUG=586079
----
- third_party/sqlite/src/ext/icu/icu.c | 48 +++++++++++++++++++++---------------
- third_party/sqlite/src/test/icu.test |  9 +++++++
- 2 files changed, 37 insertions(+), 20 deletions(-)
-
-diff --git a/third_party/sqlite/src/ext/icu/icu.c b/third_party/sqlite/src/ext/icu/icu.c
-index 5654366..263cd98 100644
---- a/third_party/sqlite/src/ext/icu/icu.c
-+++ b/third_party/sqlite/src/ext/icu/icu.c
-@@ -355,11 +355,11 @@ static void icuRegexpFunc(sqlite3_context *p, int nArg, sqlite3_value **apArg){
- */
- static void icuCaseFunc16(sqlite3_context *p, int nArg, sqlite3_value **apArg){
-   const UChar *zInput;
--  UChar *zOutput;
-+  UChar *zOutput = 0;
-   int nInput;
--  int nOutput;
--
--  UErrorCode status = U_ZERO_ERROR;
-+  int nOut;
-+  int cnt;
-+  UErrorCode status;
-   const char *zLocale = 0;
- 
-   assert(nArg==1 || nArg==2);
-@@ -371,26 +371,34 @@ static void icuCaseFunc16(sqlite3_context *p, int nArg, sqlite3_value **apArg){
-   if( !zInput ){
-     return;
-   }
--  nInput = sqlite3_value_bytes16(apArg[0]);
--
--  nOutput = nInput * 2 + 2;
--  zOutput = sqlite3_malloc(nOutput);
--  if( !zOutput ){
-+  nOut = nInput = sqlite3_value_bytes16(apArg[0]);
-+  if( nOut==0 ){
-+    sqlite3_result_text16(p, "", 0, SQLITE_STATIC);
-     return;
-   }
- 
--  if( sqlite3_user_data(p) ){
--    u_strToUpper(zOutput, nOutput/2, zInput, nInput/2, zLocale, &status);
--  }else{
--    u_strToLower(zOutput, nOutput/2, zInput, nInput/2, zLocale, &status);
--  }
--
--  if( !U_SUCCESS(status) ){
--    icuFunctionError(p, "u_strToLower()/u_strToUpper", status);
--    return;
-+  for(cnt=0; cnt<2; cnt++){
-+    UChar *zNew = sqlite3_realloc(zOutput, nOut);
-+    if( zNew==0 ){
-+      sqlite3_free(zOutput);
-+      sqlite3_result_error_nomem(p);
-+      return;
-+    }
-+    zOutput = zNew;
-+    status = U_ZERO_ERROR;
-+    if( sqlite3_user_data(p) ){
-+      nOut = 2*u_strToUpper(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
-+    }else{
-+      nOut = 2*u_strToLower(zOutput,nOut/2,zInput,nInput/2,zLocale,&status);
-+    }
-+    if( !U_SUCCESS(status) ){
-+      if( status==U_BUFFER_OVERFLOW_ERROR ) continue;
-+      icuFunctionError(p,
-+          sqlite3_user_data(p) ? "u_strToUpper()" : "u_strToLower", status);
-+      return;
-+    }
-   }
--
--  sqlite3_result_text16(p, zOutput, -1, xFree);
-+  sqlite3_result_text16(p, zOutput, nOut, xFree);
- }
- 
- /*
-diff --git a/third_party/sqlite/src/test/icu.test b/third_party/sqlite/src/test/icu.test
-index 73cb9b9..743bcfa 100644
---- a/third_party/sqlite/src/test/icu.test
-+++ b/third_party/sqlite/src/test/icu.test
-@@ -72,6 +72,10 @@ test_expr icu-2.6 {i1=$::OGRAVE} {upper(i1)}     $::OGRAVE
- test_expr icu-2.7 {i1=$::szlig} {upper(i1)}      "SS"
- test_expr icu-2.8 {i1='SS'} {lower(i1)}          "ss"
- 
-+do_execsql_test icu-2.9 {
-+  SELECT upper(char(0xfb04,0xfb04,0xfb04,0xfb04));
-+} {FFLFFLFFLFFL}
-+
- # In turkish (locale="tr_TR"), the lower case version of I
- # is "small dotless i" (code point 0x131 (decimal 305)).
- #
-@@ -133,4 +137,9 @@ do_catchsql_test icu-5.4 {
- do_catchsql_test icu-5.4 { SELECT 'abc' REGEXP }    {1 {near " ": syntax error}}
- do_catchsql_test icu-5.5 { SELECT 'abc' REGEXP, 1 } {1 {near ",": syntax error}}
- 
-+
-+do_malloc_test icu-6.10 -sqlbody {
-+  SELECT upper(char(0xfb04,0xdf,0xfb04,0xe8,0xfb04));
-+}
-+
- finish_test
--- 
-2.7.0
-