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Code Issues Releases Wiki Activity

is UTF8 / alt

This commit is contained in:
M66B 2022-01-09 19:37:13 +01:00
parent 3c9b00daa8
commit 38178bae07
1 changed files with 30 additions and 0 deletions
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30
app/src/main/java/eu/faircode/email/CharsetHelper.java
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@ -79,6 +79,36 @@ public class CharsetHelper {
}
}
static boolean isUTF8Alt(String text) {
byte[] octets = text.getBytes(StandardCharsets.ISO_8859_1);
int bytes;
for (int i = 0; i < octets.length; i++) {
if ((octets[i] & 0b10000000) == 0b00000000)
bytes = 1;
else if ((octets[i] & 0b11100000) == 0b11000000)
bytes = 2;
else if ((octets[i] & 0b11110000) == 0b11100000)
bytes = 3;
else if ((octets[i] & 0b11111000) == 0b11110000)
bytes = 4;
else if ((octets[i] & 0b11111100) == 0b11111000)
bytes = 5;
else if ((octets[i] & 0b11111110) == 0b11111100)
bytes = 6;
else
return false;
if (i + bytes > octets.length)
return false;
while (--bytes > 0)
if ((octets[++i] & 0b11000000) != 0b10000000)
return false;
}
return true;
}
static String utf8toW1252(String text) {
try {
Charset w1252 = Charset.forName("windows-1252");