[libc] [llvm] [libc] Add fixed point support to printf (PR #82707)

[Nick Desaulniers via llvm-commits]

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@@ -3201,6 +3201,166 @@ TEST_F(LlvmLibcSPrintfTest, FloatAutoLongDoubleConv) {
 
 #endif // LIBC_COPT_PRINTF_DISABLE_FLOAT
 
+#if defined(LIBC_COMPILER_HAS_FIXED_POINT) &&                                  \
+    !defined(LIBC_COPT_PRINTF_DISABLE_FIXED_POINT)
+TEST_F(LlvmLibcSPrintfTest, FixedConv) {
+
+  // These numeric tests are potentially a little weak, but the fuzz test is
+  // more thorough than my handwritten tests tend to be.
+
+  // TODO: Commit the fuzzer
+
+  written = LIBC_NAMESPACE::sprintf(buff, "%k", 0x0);
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nickdesaulniers wrote:

Perhaps a todo about using fixed point literals rather than hex?

https://github.com/llvm/llvm-project/pull/82707