From 0477554f0623c67b163f6fb5cf1ce2c0d53ee4aa Mon Sep 17 00:00:00 2001
From: "timsteele@google.com"
 <timsteele@google.com@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Thu, 21 Jan 2010 19:29:25 +0000
Subject: Move two generic string split functions from sync API to their own
 API in base/string_split.

BUG=None
TEST=base_unittests

Original patch by Thiago Farina
Original Review: http://codereview.chromium.org/464075

Review URL: http://codereview.chromium.org/502074

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36774 0039d316-1c4b-4281-b951-d872f2087c98
---
 base/string_split.cc | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 base/string_split.cc

(limited to 'base/string_split.cc')

diff --git a/base/string_split.cc b/base/string_split.cc
new file mode 100644
index 0000000..4494d25
--- /dev/null
+++ b/base/string_split.cc
@@ -0,0 +1,68 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/string_split.h"
+
+#include "base/string_util.h"
+
+namespace base {
+
+bool SplitStringIntoKeyValues(
+    const std::string& line,
+    char key_value_delimiter,
+    std::string* key, std::vector<std::string>* values) {
+  key->clear();
+  values->clear();
+
+  // find the key string
+  size_t end_key_pos = line.find_first_of(key_value_delimiter);
+  if (end_key_pos == std::string::npos) {
+    DLOG(INFO) << "cannot parse key from line: " << line;
+    return false;    // no key
+  }
+  key->assign(line, 0, end_key_pos);
+
+  // find the values string
+  std::string remains(line, end_key_pos, line.size() - end_key_pos);
+  size_t begin_values_pos = remains.find_first_not_of(key_value_delimiter);
+  if (begin_values_pos == std::string::npos) {
+    DLOG(INFO) << "cannot parse value from line: " << line;
+    return false;   // no value
+  }
+  std::string values_string(remains, begin_values_pos,
+                            remains.size() - begin_values_pos);
+
+  // construct the values vector
+  values->push_back(values_string);
+  return true;
+}
+
+bool SplitStringIntoKeyValuePairs(
+    const std::string& line,
+    char key_value_delimiter,
+    char key_value_pair_delimiter,
+    std::vector<std::pair<std::string, std::string> >* kv_pairs) {
+  kv_pairs->clear();
+
+  std::vector<std::string> pairs;
+  SplitString(line, key_value_pair_delimiter, &pairs);
+
+  bool success = true;
+  for (size_t i = 0; i < pairs.size(); ++i) {
+    std::string key;
+    std::vector<std::string> value;
+    if (!SplitStringIntoKeyValues(pairs[i],
+                                  key_value_delimiter,
+                                  &key, &value)) {
+      // Don't return here, to allow for keys without associated
+      // values; just record that our split failed.
+      success = false;
+    }
+    DCHECK_LE(value.size(), 1U);
+    kv_pairs->push_back(make_pair(key, value.empty()? "" : value[0]));
+  }
+  return success;
+}
+
+}  // namespace base
-- 
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