cast to (unsigned char) before calling ctype on char indexes.

Author: mrgtwentythree

external/gpl3/gcc/dist/libquadmath/printf/printf_fphex.c

@@ -366,7 +366,7 @@ __quadmath_printf_fphex (struct __quadmath_printf_file *fp,
 		  				   think about it!  */
 		  break;
 		}
-	      else if (tolower (ch) < 'f')
+	      else if (tolower ((unsigned char)ch) < 'f')
 		{
 		  ++numstr[cnt];
 		  ++wnumstr[cnt];
@@ -385,7 +385,7 @@ __quadmath_printf_fphex (struct __quadmath_printf_file *fp,
 		 get an overflow.  */
 	      if (leading == '9')
 		leading = info->spec;
-	      else if (tolower (leading) < 'f')
+	      else if (tolower ((unsigned char)leading) < 'f')
 		++leading;
 	      else
 		{

external/gpl3/gcc/dist/libquadmath/printf/quadmath-printf.c

@@ -189,7 +189,7 @@ quadmath_snprintf (char *str, size_t size, const char *format, ...)
       ++format;
       info.width = va_arg (ap, int);
     }
-  else if (isdigit (*format))
+  else if (isdigit ((unsigned char)*format))
     /* Constant width specification.  */
     info.width = read_int (&format);
 
@@ -206,7 +206,7 @@ quadmath_snprintf (char *str, size_t size, const char *format, ...)
 
 	  info.prec = va_arg (ap, int);
 	}
-      else if (isdigit (*format))
+      else if (isdigit ((unsigned char)*format))
 	info.prec = read_int (&format);
       else
 	/* "%.?" is treated like "%.0?".  */

external/gpl3/gcc/dist/libquadmath/strtod/strtod_l.c

@@ -57,10 +57,10 @@
 # define STRING_TYPE char
 # define CHAR_TYPE char
 # define L_(Ch) Ch
-# define ISSPACE(Ch) isspace (Ch)
-# define ISDIGIT(Ch) isdigit (Ch)
-# define ISXDIGIT(Ch) isxdigit (Ch)
-# define TOLOWER(Ch) tolower (Ch)
+# define ISSPACE(Ch) isspace ((unsigned char)Ch)
+# define ISDIGIT(Ch) isdigit ((unsigned char)Ch)
+# define ISXDIGIT(Ch) isxdigit ((unsigned char)Ch)
+# define TOLOWER(Ch) tolower ((unsigned char)Ch)
 # define TOLOWER_C(Ch) \
   ({__typeof(Ch) __tlc = (Ch); \
     (__tlc >= 'A' && __tlc <= 'Z') ? __tlc - 'A' + 'a' : __tlc; })
@@ -501,13 +501,13 @@ ____STRTOF_INTERNAL (nptr, endptr, group)
   /* Contains the last character read.  */
   CHAR_TYPE c;
 
+#ifdef USE_WIDE_CHAR
 /* We should get wint_t from <stddef.h>, but not all GCC versions define it
    there.  So define it ourselves if it remains undefined.  */
 #ifndef _WINT_T
   typedef unsigned int wint_t;
 #endif
   /* The radix character of the current locale.  */
-#ifdef USE_WIDE_CHAR
   wchar_t decimal;
 #else
   const char *decimal;