From 7c2def18f6178da4c0c6016d49a44c1552dff9f8 Mon Sep 17 00:00:00 2001
From: Robin Watts <Robin.Watts@artifex.com>
Date: Fri, 3 Apr 2026 19:02:53 +0100
Subject: [PATCH] Fix compilation in ISO C enviroments; declare vars before
 code.

---
 c/dec/decode.c | 8 ++++----
 c/enc/encode.c | 3 ++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/c/dec/decode.c b/c/dec/decode.c
index 19c7e02..90cce9d 100644
--- a/c/dec/decode.c
+++ b/c/dec/decode.c
@@ -481,6 +481,9 @@ static BROTLI_INLINE int BrotliCopyPreloadedSymbolsToU8(const HuffmanCode* table
                                                         uint8_t* ringbuffer,
                                                         int pos,
                                                         const int limit) {
+  const int kMaximalOverread = 4;
+  int pos_limit = limit;
+  int copies = 0;
   /* Calculate range where CheckInputAmount is always true.
      Start with the number of bytes we can read. */
   int64_t new_lim = br->guard_in - br->next_in;
@@ -488,9 +491,6 @@ static BROTLI_INLINE int BrotliCopyPreloadedSymbolsToU8(const HuffmanCode* table
   new_lim *= 8;
   /* At most 15 bits per symbol, so this is safe. */
   new_lim /= 15;
-  const int kMaximalOverread = 4;
-  int pos_limit = limit;
-  int copies = 0;
   if ((new_lim - kMaximalOverread) <= limit) {
     // Safe cast, since new_lim is already < num_steps
     pos_limit = (int)(new_lim - kMaximalOverread);
@@ -2086,10 +2086,10 @@ CommandInner:
       } while (--i != 0);
     } else { /* safe */
       do {
+        brotli_reg_t literal;
         if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) {
           goto NextLiteralBlock;
         }
-        brotli_reg_t literal;
         if (!SafeReadSymbol(s->literal_htree, br, &literal)) {
           result = BROTLI_DECODER_NEEDS_MORE_INPUT;
           goto saveStateAndReturn;
diff --git a/c/enc/encode.c b/c/enc/encode.c
index 9e72744..b2583e4 100644
--- a/c/enc/encode.c
+++ b/c/enc/encode.c
@@ -761,11 +761,12 @@ static void BrotliEncoderInitState(BrotliEncoderState* s) {
 
 BrotliEncoderState* BrotliEncoderCreateInstance(
     brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) {
+  BrotliEncoderState* state;
   BROTLI_BOOL healthy = BrotliEncoderEnsureStaticInit();
   if (!healthy) {
     return 0;
   }
-  BrotliEncoderState* state = (BrotliEncoderState*)BrotliBootstrapAlloc(
+  state = (BrotliEncoderState*)BrotliBootstrapAlloc(
       sizeof(BrotliEncoderState), alloc_func, free_func, opaque);
   if (state == NULL) {
     /* BROTLI_DUMP(); */