1 files changed, 47 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/utils/SkJSONWriter.cpp b/gfx/skia/skia/src/utils/SkJSONWriter.cpp
new file mode 100644
index 0000000000..3038f2e7cf
--- /dev/null
+++ b/gfx/skia/skia/src/utils/SkJSONWriter.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// Make sure that the PRI format string macros are defined
+#ifndef __STDC_FORMAT_MACROS
+#define __STDC_FORMAT_MACROS
+#endif
+
+#include "src/utils/SkJSONWriter.h"
+
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+void SkJSONWriter::appendS64(int64_t value) {
+    this->beginValue();
+    this->appendf("%" PRId64, value);
+}
+
+void SkJSONWriter::appendU64(uint64_t value) {
+    this->beginValue();
+    this->appendf("%" PRIu64, value);
+}
+
+void SkJSONWriter::appendHexU64(uint64_t value) {
+    this->beginValue();
+    this->appendf("\"0x%" PRIx64 "\"", value);
+}
+
+void SkJSONWriter::appendf(const char* fmt, ...) {
+    const int kBufferSize = 1024;
+    char buffer[kBufferSize];
+    va_list argp;
+    va_start(argp, fmt);
+#ifdef SK_BUILD_FOR_WIN
+    int length = _vsnprintf_s(buffer, kBufferSize, _TRUNCATE, fmt, argp);
+#else
+    int length = vsnprintf(buffer, kBufferSize, fmt, argp);
+#endif
+    SkASSERT(length >= 0 && length < kBufferSize);
+    va_end(argp);
+    this->write(buffer, length);
+}