diff options
Diffstat (limited to 'src/google/protobuf/stubs/strutil.cc')
-rw-r--r-- | src/google/protobuf/stubs/strutil.cc | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/google/protobuf/stubs/strutil.cc b/src/google/protobuf/stubs/strutil.cc index ee07ce75..917b3e9f 100644 --- a/src/google/protobuf/stubs/strutil.cc +++ b/src/google/protobuf/stubs/strutil.cc @@ -189,6 +189,44 @@ void SplitStringUsing(const string& full, SplitStringToIteratorUsing(full, delim, it); } +// Split a string using a character delimiter. Append the components +// to 'result'. If there are consecutive delimiters, this function +// will return corresponding empty strings. The string is split into +// at most the specified number of pieces greedily. This means that the +// last piece may possibly be split further. To split into as many pieces +// as possible, specify 0 as the number of pieces. +// +// If "full" is the empty string, yields an empty string as the only value. +// +// If "pieces" is negative for some reason, it returns the whole string +// ---------------------------------------------------------------------- +template <typename StringType, typename ITR> +static inline +void SplitStringToIteratorAllowEmpty(const StringType& full, + const char* delim, + int pieces, + ITR& result) { + string::size_type begin_index, end_index; + begin_index = 0; + + for (int i = 0; (i < pieces-1) || (pieces == 0); i++) { + end_index = full.find_first_of(delim, begin_index); + if (end_index == string::npos) { + *result++ = full.substr(begin_index); + return; + } + *result++ = full.substr(begin_index, (end_index - begin_index)); + begin_index = end_index + 1; + } + *result++ = full.substr(begin_index); +} + +void SplitStringAllowEmpty(const string& full, const char* delim, + vector<string>* result) { + back_insert_iterator<vector<string> > it(*result); + SplitStringToIteratorAllowEmpty(full, delim, 0, it); +} + // ---------------------------------------------------------------------- // JoinStrings() // This merges a vector of string components with delim inserted |