mudhorn/zxing
1
0
Fork 0
mirror of https://github.com/zxing/zxing.git synced 2025-03-05 20:48:51 -08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Be more conservative about choosing Kanji mode. Since we don't support mixed mode, can only use it when the input is all double-byte Kanji.

Browse source 
git-svn-id: https://zxing.googlecode.com/svn/trunk@1107 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2009-11-13 09:49:49 +00:00
parent 0debee9c71
commit ac64595afa
1 changed files with 23 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
core/src/com/google/zxing/qrcode/encoder/Encoder.java
View file

@ -174,11 +174,12 @@ public final class Encoder {
/**
* Choose the best mode by examining the content. Note that 'encoding' is used as a hint;
* if it is Shift_JIS then we assume the input is Kanji and return {@link Mode#KANJI}.
* if it is Shift_JIS, and the input is only double-byte Kanji, then we return {@link Mode#KANJI}.
*/
public static Mode chooseMode(String content, String encoding) {
if ("Shift_JIS".equals(encoding)) {
return Mode.KANJI;
// Choose Kanji mode if all input are double-byte characters
return isOnlyDoubleByteKanji(content) ? Mode.KANJI : Mode.BYTE;
}
boolean hasNumeric = false;
boolean hasAlphanumeric = false;
@ -200,6 +201,26 @@ public final class Encoder {
return Mode.BYTE;
}
private static boolean isOnlyDoubleByteKanji(String content) {
byte[] bytes;
try {
bytes = content.getBytes("Shift_JIS");
} catch (UnsupportedEncodingException uee) {
return false;
}
int length = bytes.length;
if (length % 2 != 0) {
return false;
}
for (int i = 0; i < length; i += 2) {
int byte1 = bytes[i] & 0xFF;
if ((byte1 < 0x81 || byte1 > 0x9F) && (byte1 < 0xE0 || byte1 > 0xEB)) {
return false;
}
}
return true;
}
private static int chooseMaskPattern(BitVector bits, ErrorCorrectionLevel ecLevel, int version,
ByteMatrix matrix) throws WriterException {