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-rw-r--r--src/leveldb/util/logging.cc81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/leveldb/util/logging.cc b/src/leveldb/util/logging.cc
new file mode 100644
index 0000000000..22cf278512
--- /dev/null
+++ b/src/leveldb/util/logging.cc
@@ -0,0 +1,81 @@
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "util/logging.h"
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "leveldb/env.h"
+#include "leveldb/slice.h"
+
+namespace leveldb {
+
+void AppendNumberTo(std::string* str, uint64_t num) {
+ char buf[30];
+ snprintf(buf, sizeof(buf), "%llu", (unsigned long long) num);
+ str->append(buf);
+}
+
+void AppendEscapedStringTo(std::string* str, const Slice& value) {
+ for (size_t i = 0; i < value.size(); i++) {
+ char c = value[i];
+ if (c >= ' ' && c <= '~') {
+ str->push_back(c);
+ } else {
+ char buf[10];
+ snprintf(buf, sizeof(buf), "\\x%02x",
+ static_cast<unsigned int>(c) & 0xff);
+ str->append(buf);
+ }
+ }
+}
+
+std::string NumberToString(uint64_t num) {
+ std::string r;
+ AppendNumberTo(&r, num);
+ return r;
+}
+
+std::string EscapeString(const Slice& value) {
+ std::string r;
+ AppendEscapedStringTo(&r, value);
+ return r;
+}
+
+bool ConsumeChar(Slice* in, char c) {
+ if (!in->empty() && (*in)[0] == c) {
+ in->remove_prefix(1);
+ return true;
+ } else {
+ return false;
+ }
+}
+
+bool ConsumeDecimalNumber(Slice* in, uint64_t* val) {
+ uint64_t v = 0;
+ int digits = 0;
+ while (!in->empty()) {
+ char c = (*in)[0];
+ if (c >= '0' && c <= '9') {
+ ++digits;
+ const int delta = (c - '0');
+ static const uint64_t kMaxUint64 = ~static_cast<uint64_t>(0);
+ if (v > kMaxUint64/10 ||
+ (v == kMaxUint64/10 && delta > kMaxUint64%10)) {
+ // Overflow
+ return false;
+ }
+ v = (v * 10) + delta;
+ in->remove_prefix(1);
+ } else {
+ break;
+ }
+ }
+ *val = v;
+ return (digits > 0);
+}
+
+} // namespace leveldb