1 files changed, 114 insertions, 0 deletions
diff --git a/modules/brotli/enc/memory.h b/modules/brotli/enc/memory.h
new file mode 100644
index 0000000000..832e7b2b6e
--- /dev/null
+++ b/modules/brotli/enc/memory.h
@@ -0,0 +1,114 @@
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Macros for memory management. */
+
+#ifndef BROTLI_ENC_MEMORY_H_
+#define BROTLI_ENC_MEMORY_H_
+
+#include <string.h>  /* memcpy */
+
+#include "../common/platform.h"
+#include <brotli/types.h>
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#if !defined(BROTLI_ENCODER_CLEANUP_ON_OOM) && \
+    !defined(BROTLI_ENCODER_EXIT_ON_OOM)
+#define BROTLI_ENCODER_EXIT_ON_OOM
+#endif
+
+typedef struct MemoryManager {
+  brotli_alloc_func alloc_func;
+  brotli_free_func free_func;
+  void* opaque;
+#if !defined(BROTLI_ENCODER_EXIT_ON_OOM)
+  BROTLI_BOOL is_oom;
+  size_t perm_allocated;
+  size_t new_allocated;
+  size_t new_freed;
+  void* pointers[256];
+#endif  /* BROTLI_ENCODER_EXIT_ON_OOM */
+} MemoryManager;
+
+BROTLI_INTERNAL void BrotliInitMemoryManager(
+    MemoryManager* m, brotli_alloc_func alloc_func, brotli_free_func free_func,
+    void* opaque);
+
+BROTLI_INTERNAL void* BrotliAllocate(MemoryManager* m, size_t n);
+#define BROTLI_ALLOC(M, T, N)                               \
+  ((N) > 0 ? ((T*)BrotliAllocate((M), (N) * sizeof(T))) : NULL)
+
+BROTLI_INTERNAL void BrotliFree(MemoryManager* m, void* p);
+#define BROTLI_FREE(M, P) { \
+  BrotliFree((M), (P));     \
+  P = NULL;                 \
+}
+
+#if defined(BROTLI_ENCODER_EXIT_ON_OOM)
+#define BROTLI_IS_OOM(M) (!!0)
+#else  /* BROTLI_ENCODER_EXIT_ON_OOM */
+#define BROTLI_IS_OOM(M) (!!(M)->is_oom)
+#endif  /* BROTLI_ENCODER_EXIT_ON_OOM */
+
+/*
+BROTLI_IS_NULL is a fake check, BROTLI_IS_OOM does the heavy lifting.
+The only purpose of it is to explain static analyzers the state of things.
+NB: use ONLY together with BROTLI_IS_OOM
+    AND ONLY for allocations in the current scope.
+ */
+#if defined(__clang_analyzer__) && !defined(BROTLI_ENCODER_EXIT_ON_OOM)
+#define BROTLI_IS_NULL(A) ((A) == nullptr)
+#else  /* defined(__clang_analyzer__) */
+#define BROTLI_IS_NULL(A) (!!0)
+#endif  /* defined(__clang_analyzer__) */
+
+BROTLI_INTERNAL void BrotliWipeOutMemoryManager(MemoryManager* m);
+
+/*
+Dynamically grows array capacity to at least the requested size
+M: MemoryManager
+T: data type
+A: array
+C: capacity
+R: requested size
+*/
+#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) {                    \
+  if (C < (R)) {                                                   \
+    size_t _new_size = (C == 0) ? (R) : C;                         \
+    T* new_array;                                                  \
+    while (_new_size < (R)) _new_size *= 2;                        \
+    new_array = BROTLI_ALLOC((M), T, _new_size);                   \
+    if (!BROTLI_IS_OOM(M) && !BROTLI_IS_NULL(new_array) && C != 0) \
+      memcpy(new_array, A, C * sizeof(T));                         \
+    BROTLI_FREE((M), A);                                           \
+    A = new_array;                                                 \
+    C = _new_size;                                                 \
+  }                                                                \
+}
+
+/*
+Appends value and dynamically grows array capacity when needed
+M: MemoryManager
+T: data type
+A: array
+C: array capacity
+S: array size
+V: value to append
+*/
+#define BROTLI_ENSURE_CAPACITY_APPEND(M, T, A, C, S, V) { \
+  (S)++;                                                  \
+  BROTLI_ENSURE_CAPACITY(M, T, A, C, S);                  \
+  A[(S) - 1] = (V);                                       \
+}
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
+
+#endif  /* BROTLI_ENC_MEMORY_H_ */