Move utf8_to_utf16 into QUtil

1 files changed, 1 insertions, 56 deletions

diff --git a/libqpdf/QPDF_String.cc b/libqpdf/QPDF_String.cc
index 633f1699..7cfb6bcc 100644
--- a/libqpdf/QPDF_String.cc
+++ b/libqpdf/QPDF_String.cc
@@ -64,65 +64,10 @@ QPDF_String::~QPDF_String()
 {
 }
 
-enum encoding_e { e_utf16 };
-
-static
-std::string
-transcode_utf8(std::string const& utf8_val, encoding_e encoding)
-{
-    std::string 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);
-        }
-        else
-        {
-            size_t bytes_needed = 0;
-            unsigned bit_check = 0x40;
-            unsigned char to_clear = 0x80;
-            while (ch & bit_check)
-            {
-                ++bytes_needed;
-                to_clear |= bit_check;
-                bit_check >>= 1;
-            }
-
-            if (((bytes_needed > 5) || (bytes_needed < 1)) ||
-                ((i + bytes_needed) >= len))
-            {
-                result += "\xff\xfd";
-            }
-            else
-            {
-                unsigned long codepoint = (ch & ~to_clear);
-                while (bytes_needed > 0)
-                {
-                    --bytes_needed;
-                    ch = utf8_val.at(++i);
-                    if ((ch & 0xc0) != 0x80)
-                    {
-                        --i;
-                        codepoint = 0xfffd;
-                        break;
-                    }
-                    codepoint <<= 6;
-                    codepoint += (ch & 0x3f);
-                }
-                result += QUtil::toUTF16(codepoint);
-            }
-        }
-    }
-    return result;
-}
-
 QPDF_String*
 QPDF_String::new_utf16(std::string const& utf8_val)
 {
-    return new QPDF_String(transcode_utf8(utf8_val, e_utf16));
+    return new QPDF_String(QUtil::utf8_to_utf16(utf8_val));
 }
 
 std::string