1 files changed, 136 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/core/SkDataTable.cpp b/gfx/skia/skia/src/core/SkDataTable.cpp
new file mode 100644
index 0000000000..d15e65b473
--- /dev/null
+++ b/gfx/skia/skia/src/core/SkDataTable.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "include/core/SkDataTable.h"
+
+#include "include/core/SkRefCnt.h"
+#include "include/private/base/SkAssert.h"
+#include "include/private/base/SkMalloc.h"
+#include "include/private/base/SkOnce.h"
+
+#include <cstring>
+
+static void malloc_freeproc(void* context) {
+    sk_free(context);
+}
+
+// Makes empty table
+SkDataTable::SkDataTable() {
+    fCount = 0;
+    fElemSize = 0;   // 0 signals that we use fDir instead of fElems
+    fU.fDir = nullptr;
+    fFreeProc = nullptr;
+    fFreeProcContext = nullptr;
+}
+
+SkDataTable::SkDataTable(const void* array, size_t elemSize, int count,
+                         FreeProc proc, void* context) {
+    SkASSERT(count > 0);
+
+    fCount = count;
+    fElemSize = elemSize;   // non-zero signals we use fElems instead of fDir
+    fU.fElems = (const char*)array;
+    fFreeProc = proc;
+    fFreeProcContext = context;
+}
+
+SkDataTable::SkDataTable(const Dir* dir, int count, FreeProc proc, void* ctx) {
+    SkASSERT(count > 0);
+
+    fCount = count;
+    fElemSize = 0;  // 0 signals that we use fDir instead of fElems
+    fU.fDir = dir;
+    fFreeProc = proc;
+    fFreeProcContext = ctx;
+}
+
+SkDataTable::~SkDataTable() {
+    if (fFreeProc) {
+        fFreeProc(fFreeProcContext);
+    }
+}
+
+size_t SkDataTable::atSize(int index) const {
+    SkASSERT((unsigned)index < (unsigned)fCount);
+
+    if (fElemSize) {
+        return fElemSize;
+    } else {
+        return fU.fDir[index].fSize;
+    }
+}
+
+const void* SkDataTable::at(int index, size_t* size) const {
+    SkASSERT((unsigned)index < (unsigned)fCount);
+
+    if (fElemSize) {
+        if (size) {
+            *size = fElemSize;
+        }
+        return fU.fElems + index * fElemSize;
+    } else {
+        if (size) {
+            *size = fU.fDir[index].fSize;
+        }
+        return fU.fDir[index].fPtr;
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+sk_sp<SkDataTable> SkDataTable::MakeEmpty() {
+    static SkDataTable* singleton;
+    static SkOnce once;
+    once([]{ singleton = new SkDataTable(); });
+    return sk_ref_sp(singleton);
+}
+
+sk_sp<SkDataTable> SkDataTable::MakeCopyArrays(const void * const * ptrs,
+                                               const size_t sizes[], int count) {
+    if (count <= 0) {
+        return SkDataTable::MakeEmpty();
+    }
+
+    size_t dataSize = 0;
+    for (int i = 0; i < count; ++i) {
+        dataSize += sizes[i];
+    }
+
+    size_t bufferSize = count * sizeof(Dir) + dataSize;
+    void* buffer = sk_malloc_throw(bufferSize);
+
+    Dir* dir = (Dir*)buffer;
+    char* elem = (char*)(dir + count);
+    for (int i = 0; i < count; ++i) {
+        dir[i].fPtr = elem;
+        dir[i].fSize = sizes[i];
+        memcpy(elem, ptrs[i], sizes[i]);
+        elem += sizes[i];
+    }
+
+    return sk_sp<SkDataTable>(new SkDataTable(dir, count, malloc_freeproc, buffer));
+}
+
+sk_sp<SkDataTable> SkDataTable::MakeCopyArray(const void* array, size_t elemSize, int count) {
+    if (count <= 0) {
+        return SkDataTable::MakeEmpty();
+    }
+
+    size_t bufferSize = elemSize * count;
+    void* buffer = sk_malloc_throw(bufferSize);
+    memcpy(buffer, array, bufferSize);
+
+    return sk_sp<SkDataTable>(new SkDataTable(buffer, elemSize, count, malloc_freeproc, buffer));
+}
+
+sk_sp<SkDataTable> SkDataTable::MakeArrayProc(const void* array, size_t elemSize, int count,
+                                              FreeProc proc, void* ctx) {
+    if (count <= 0) {
+        return SkDataTable::MakeEmpty();
+    }
+    return sk_sp<SkDataTable>(new SkDataTable(array, elemSize, count, proc, ctx));
+}