From 47c3d1a2db6245ed4bb234ce1b815c74f7211a64 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 15 Aug 2026 23:38:19 +0000
Subject: [PATCH] Revert "Try fix for consumeHexNumber to improve hex parsing"

This reverts commit b9a7c4da61311b96aa04c462a2c9e3f89a4b9ba2.

Co-authored-by: uNetworkingAB <110806833+uNetworkingAB@users.noreply.github.com>
---
 src/ChunkedEncoding.h | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/src/ChunkedEncoding.h b/src/ChunkedEncoding.h
index a83b216a6..5b959ad30 100644
--- a/src/ChunkedEncoding.h
+++ b/src/ChunkedEncoding.h
@@ -44,28 +44,26 @@ namespace uWS {
     inline void consumeHexNumber(std::string_view &data, uint64_t &state) {
         /* Consume everything higher than 32 */
         while (data.length() && data.data()[0] > 32) {
-    
+
             unsigned char digit = (unsigned char)data.data()[0];
-            unsigned int number;
-    
-            if (digit >= '0' && digit <= '9') {
-                number = (unsigned int) (digit - '0');
-            } else if (digit >= 'a' && digit <= 'f') {
-                number = (unsigned int) (digit - 'a') + 10;
-            } else if (digit >= 'A' && digit <= 'F') {
-                number = (unsigned int) (digit - 'A') + 10;
-            } else {
-                /* Not a hex digit: chunk-size token ends here (chunk-ext follows) */
-                break;
+            if (digit >= 'a') {
+                digit = (unsigned char) (digit - ('a' - ':'));
+            } else if (digit >= 'A') {
+                digit = (unsigned char) (digit - ('A' - ':'));
             }
-    
-            if (chunkSize(state) & STATE_SIZE_OVERFLOW) {
+
+            unsigned int number = ((unsigned int) digit - (unsigned int) '0');
+
+            if (number > 16 || (chunkSize(state) & STATE_SIZE_OVERFLOW)) {
                 state = STATE_IS_ERROR;
                 return;
             }
-    
-            uint64_t bits = STATE_IS_CHUNKED;
+
+            // extract state bits
+            uint64_t bits = /*state &*/ STATE_IS_CHUNKED;
+
             state = (state & STATE_SIZE_MASK) * 16ull + number;
+
             state |= bits;
             data.remove_prefix(1);
         }