correct locking in stdio functions that tried to be lock-free

[musl] / src / stdio / vfwscanf.c

diff --git a/src/stdio/vfwscanf.c b/src/stdio/vfwscanf.c
index dbba865..b3bc6f3 100644 (file)
--- a/src/stdio/vfwscanf.c
+++ b/src/stdio/vfwscanf.c
@@ -86,7 +86,7 @@ static int in_set(const wchar_t *set, int c)
        ((f)->rend && (c)<128U ? *--(f)->rpos : ungetwc((c),(f)))
 #endif
 
-int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
+int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
 {
        int width;
        int size;
@@ -181,8 +181,11 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
                /* Transform ls,lc -> S,C */
                if (size==SIZE_l && (t&15)==3) t&=~32;
 
-               if (t != 'n' && t != '[' && (t|32) != 'c') {
-                       while (iswspace((c=getwc(f)))) pos++;
+               if (t != 'n') {
+                       if (t != '[' && (t|32) != 'c')
+                               while (iswspace((c=getwc(f)))) pos++;
+                       else
+                               c=getwc(f);
                        if (c < 0) goto input_fail;
                        ungetwc(c, f);
                }
@@ -264,9 +267,7 @@ int vfwscanf(FILE *f, const wchar_t *fmt, va_list ap)
                        }
                        if (width) ungetwc(c, f);
 
-                       if (!gotmatch)
-                               if (c>=0) goto match_fail;
-                               else goto input_fail;
+                       if (!gotmatch) goto match_fail;
 
                        if (*p==']') p++;
                        while (*p!=']') {