[PATCH] msvcrt: Fix the layout of threadlocaleinfostruct for ucrt

[Martin Storsjo]

In ucrt, this struct has a different layout, with only three fields
exposed in headers (which can be used by inline functions).

This fixes use of some ctype.h functions like e.g. _isdigit_l
from applications that use ucrt (both with MSVC and mingw-w64).

Signed-off-by: Martin Storsjo 
---
 dlls/msvcrt/msvcrt.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/dlls/msvcrt/msvcrt.h b/dlls/msvcrt/msvcrt.h
index 552b48aa53..ccb8fec1af 100644
--- a/dlls/msvcrt/msvcrt.h
+++ b/dlls/msvcrt/msvcrt.h
@@ -163,8 +163,19 @@ typedef struct {
 } MSVCRT___lc_time_data;

typedef struct MSVCRT_threadlocaleinfostruct {
+#if _MSVCR_VER >= 140
+    // In UCRT, only these three members are visible in user facing headers.
+    unsigned short *pctype;
+    int mb_cur_max;
+    unsigned int lc_codepage;
+    // Keep the rest of the struct (except for these members) below, that
+    // msvcrt internal code needs.
+#endif
+
     int refcount;
+#if _MSVCR_VER < 140
     unsigned int lc_codepage;
+#endif
     unsigned int lc_collate_cp;
     MSVCRT_ulong lc_handle[6];
     MSVCRT_LC_ID lc_id[6];
@@ -175,14 +186,18 @@ typedef struct MSVCRT_threadlocaleinfostruct {
         int *wrefcount;
     } lc_category[6];
     int lc_clike;
+#if _MSVCR_VER < 140
     int mb_cur_max;
+#endif
     int *lconv_intl_refcount;
     int *lconv_num_refcount;
     int *lconv_mon_refcount;
     struct MSVCRT_lconv *lconv;
     int *ctype1_refcount;
     unsigned short *ctype1;
+#if _MSVCR_VER < 140
     unsigned short *pctype;
+#endif
     unsigned char *pclmap;
     unsigned char *pcumap;
     MSVCRT___lc_time_data *lc_time_curr;

[Piotr Caban]

Hi Martin,

On 10/2/19 9:32 AM, Martin Storsjo wrote:
> typedef struct MSVCRT_threadlocaleinfostruct {
> +#if _MSVCR_VER >= 140
> - // In UCRT, only these three members are visible in user facing headers.
> - unsigned short *pctype;
> - int mb_cur_max;
> - unsigned int lc_codepage;
> - // Keep the rest of the struct (except for these members) below, that
> - // msvcrt internal code needs.
>
> +#endif

The change looks good for me. Please don't use c++ style comments 
(probably the comments are not needed at all).

Thanks,
Piotr