diff options
Diffstat (limited to 'libqpdf')
| -rw-r--r-- | libqpdf/QUtil.cc | 59 |
1 files changed, 34 insertions, 25 deletions
diff --git a/libqpdf/QUtil.cc b/libqpdf/QUtil.cc index ba4aea2c..04b9b190 100644 --- a/libqpdf/QUtil.cc +++ b/libqpdf/QUtil.cc @@ -893,20 +893,32 @@ QUtil::parse_numrange(char const* range, int max) return result; } -enum encoding_e { e_utf16 }; +enum encoding_e { e_utf16, e_ascii }; static std::string -transcode_utf8(std::string const& utf8_val, encoding_e encoding) +transcode_utf8(std::string const& utf8_val, encoding_e encoding, + char unknown) { - std::string result = "\xfe\xff"; + std::string result; + if (encoding == e_utf16) + { + result += "\xfe\xff"; + } size_t len = utf8_val.length(); for (size_t i = 0; i < len; ++i) { unsigned char ch = static_cast<unsigned char>(utf8_val.at(i)); if (ch < 128) { - result += QUtil::toUTF16(ch); + if (encoding == e_utf16) + { + result += QUtil::toUTF16(ch); + } + else + { + result.append(1, ch); + } } else { @@ -923,7 +935,14 @@ transcode_utf8(std::string const& utf8_val, encoding_e encoding) if (((bytes_needed > 5) || (bytes_needed < 1)) || ((i + bytes_needed) >= len)) { - result += "\xff\xfd"; + if (encoding == e_utf16) + { + result += "\xff\xfd"; + } + else + { + result.append(1, unknown); + } } else { @@ -941,7 +960,14 @@ transcode_utf8(std::string const& utf8_val, encoding_e encoding) codepoint <<= 6; codepoint += (ch & 0x3f); } - result += QUtil::toUTF16(codepoint); + if (encoding == e_utf16) + { + result += QUtil::toUTF16(codepoint); + } + else + { + result.append(1, unknown); + } } } } @@ -951,28 +977,11 @@ transcode_utf8(std::string const& utf8_val, encoding_e encoding) std::string QUtil::utf8_to_utf16(std::string const& utf8) { - return transcode_utf8(utf8, e_utf16); + return transcode_utf8(utf8, e_utf16, 0); } std::string QUtil::utf8_to_ascii(std::string const& utf8, char unknown_char) { - std::string ascii_value; - for (size_t i = 0; i < utf8.length(); ++i) - { - unsigned char ch = static_cast<unsigned char>(utf8.at(i)); - if (ch < 128) - { - ascii_value.append(1, ch); - } - else if ((ch & 0xc0) == 0x80) - { - // Ignore subsequent byte of UTF-8 encoded character - } - else - { - ascii_value.append(1, unknown_char); - } - } - return ascii_value; + return transcode_utf8(utf8, e_ascii, unknown_char); } |