diff options
Diffstat (limited to 'src/google/protobuf/stubs/strutil.cc')
| -rw-r--r-- | src/google/protobuf/stubs/strutil.cc | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/src/google/protobuf/stubs/strutil.cc b/src/google/protobuf/stubs/strutil.cc index 76d9d21e..bb658ba8 100644 --- a/src/google/protobuf/stubs/strutil.cc +++ b/src/google/protobuf/stubs/strutil.cc @@ -425,8 +425,8 @@ string UnescapeCEscapeString(const string& src) { // // Currently only \n, \r, \t, ", ', \ and !isprint() chars are escaped. // ---------------------------------------------------------------------- -static int CEscapeInternal(const char* src, int src_len, char* dest, - int dest_len, bool use_hex) { +int CEscapeInternal(const char* src, int src_len, char* dest, + int dest_len, bool use_hex, bool utf8_safe) { const char* src_end = src + src_len; int used = 0; bool last_hex_escape = false; // true if last output char was \xNN @@ -447,7 +447,9 @@ static int CEscapeInternal(const char* src, int src_len, char* dest, // Note that if we emit \xNN and the src character after that is a hex // digit then that digit must be escaped too to prevent it being // interpreted as part of the character code by C. - if (!isprint(*src) || (last_hex_escape && isxdigit(*src))) { + if ((!utf8_safe || static_cast<uint8>(*src) < 0x80) && + (!isprint(*src) || + (last_hex_escape && isxdigit(*src)))) { if (dest_len - used < 4) // need space for 4 letter escape return -1; sprintf(dest + used, (use_hex ? "\\x%02x" : "\\%03o"), @@ -469,7 +471,7 @@ static int CEscapeInternal(const char* src, int src_len, char* dest, } int CEscapeString(const char* src, int src_len, char* dest, int dest_len) { - return CEscapeInternal(src, src_len, dest, dest_len, false); + return CEscapeInternal(src, src_len, dest, dest_len, false, false); } // ---------------------------------------------------------------------- @@ -486,11 +488,33 @@ string CEscape(const string& src) { const int dest_length = src.size() * 4 + 1; // Maximum possible expansion scoped_array<char> dest(new char[dest_length]); const int len = CEscapeInternal(src.data(), src.size(), - dest.get(), dest_length, false); + dest.get(), dest_length, false, false); GOOGLE_DCHECK_GE(len, 0); return string(dest.get(), len); } +namespace strings { + +string Utf8SafeCEscape(const string& src) { + const int dest_length = src.size() * 4 + 1; // Maximum possible expansion + scoped_array<char> dest(new char[dest_length]); + const int len = CEscapeInternal(src.data(), src.size(), + dest.get(), dest_length, false, true); + GOOGLE_DCHECK_GE(len, 0); + return string(dest.get(), len); +} + +string CHexEscape(const string& src) { + const int dest_length = src.size() * 4 + 1; // Maximum possible expansion + scoped_array<char> dest(new char[dest_length]); + const int len = CEscapeInternal(src.data(), src.size(), + dest.get(), dest_length, true, false); + GOOGLE_DCHECK_GE(len, 0); + return string(dest.get(), len); +} + +} // namespace strings + // ---------------------------------------------------------------------- // strto32_adaptor() // strtou32_adaptor() |