Piotr Caban : ucrtbase: Fix end pointer setting in parse_double on partial nan/infinity match.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3fc3d24c3cfb411439bf5773067ce42aa09edb6b
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=3fc3d24c3cfb411439bf5773067ce42aa09edb6b

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Tue Jan  7 15:35:52 2020 +0100

ucrtbase: Fix end pointer setting in parse_double on partial nan/infinity match.

Signed-off-by: Piotr Caban <piotr at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/msvcrt/string.c         | 4 ++++
 dlls/ucrtbase/tests/string.c | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/dlls/msvcrt/string.c b/dlls/msvcrt/string.c
index 78a115550c..c4bd8ab129 100644
--- a/dlls/msvcrt/string.c
+++ b/dlls/msvcrt/string.c
@@ -706,7 +706,11 @@ double parse_double(MSVCRT_wchar_t (*get)(void *ctx), void (*unget)(void *ctx),
         if(keep) {
             if (str_match == _infinity) return sign*INFINITY;
             if (str_match == _nan) return sign*NAN;
+        } else if(found_sign) {
+            unget(ctx);
         }
+
+        return make_double(sign, exp, d, ROUND_ZERO, err);
     }
 
     if(nch == '0') {
diff --git a/dlls/ucrtbase/tests/string.c b/dlls/ucrtbase/tests/string.c
index 0bb3feaa2f..c18b5483aa 100644
--- a/dlls/ucrtbase/tests/string.c
+++ b/dlls/ucrtbase/tests/string.c
@@ -144,6 +144,8 @@ static void test_strtod(void)
     test_strtod_str("inf42", INFINITY, 3);
     test_strtod_str("inffoo", INFINITY, 3);
     test_strtod_str("infini", INFINITY, 3);
+    test_strtod_str("input", 0, 0);
+    test_strtod_str("-input", 0, 0);
 
     test_strtod_str("NAN", NAN, 3);
     test_strtod_str("nan", NAN, 3);