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Auto recognize ISO-2022-JP

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M66B
2020-10-09 17:43:02 +02:00
parent b49208083e
commit cd1556470b
3 changed files with 127 additions and 51 deletions
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46
app/src/main/java/eu/faircode/email/Helper.java
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@@ -961,52 +961,6 @@ public class Helper {
return false;
}
static boolean isUTF8(String text) {
// Get extended ASCII characters
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 boolean isISO8859(String text) {
// https://en.wikipedia.org/wiki/ISO/IEC_8859-1
int c;
byte[] octets = text.getBytes(StandardCharsets.ISO_8859_1);
for (byte b : octets) {
c = b & 0xFF;
if (c < 32)
return false;
if (c >= 127 && c < 160)
return false;
}
return true;
}
static boolean isSingleScript(String s) {
// https://en.wikipedia.org/wiki/IDN_homograph_attack
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)