[libc] Change ctype to be encoding independent (#110574)

The previous implementation of the ctype functions assumed ASCII.
This patch changes to a switch/case implementation that looks odd, but
actually is easier for the compiler to understand and optimize.

1 files changed, 3 insertions, 1 deletions

diff --git a/libc/test/UnitTest/MemoryMatcher.cpp b/libc/test/UnitTest/MemoryMatcher.cpp
index 244f25572c37..3cd5174fd7f7 100644
--- a/libc/test/UnitTest/MemoryMatcher.cpp
+++ b/libc/test/UnitTest/MemoryMatcher.cpp
@@ -8,6 +8,7 @@
 
 #include "MemoryMatcher.h"
 
+#include "src/__support/ctype_utils.h"
 #include "src/__support/macros/config.h"
 #include "test/UnitTest/Test.h"
 
@@ -40,7 +41,8 @@ bool MemoryMatcher::match(MemoryView actualValue) {
 
 static void display(char C) {
   const auto print = [](unsigned char I) {
-    tlog << static_cast<char>(I < 10 ? '0' + I : 'A' + I - 10);
+    tlog << static_cast<char>(LIBC_NAMESPACE::internal::toupper(
+        LIBC_NAMESPACE::internal::int_to_b36_char(I)));
   };
   print(static_cast<unsigned char>(C) / 16);
   print(static_cast<unsigned char>(C) & 15);