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Code Issues Releases Wiki Activity

Cleanup

This commit is contained in:
M66B 2020-10-16 18:33:05 +02:00
parent e95f7c5ed8
commit 03b40c1417
1 changed files with 0 additions and 61 deletions
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61
app/src/main/java/eu/faircode/email/CharsetHelper.java
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@ -21,7 +21,6 @@ package eu.faircode.email;
import java.nio.charset.Charset; import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets; import java.nio.charset.StandardCharsets;
import java.nio.charset.UnsupportedCharsetException;
class CharsetHelper { class CharsetHelper {
private static final int MAX_SAMPLE_SIZE = 8192; private static final int MAX_SAMPLE_SIZE = 8192;
@ -64,66 +63,6 @@ class CharsetHelper {
return true; 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 isISO2022JP(String text) {
// https://en.wikipedia.org/wiki/ISO/IEC_2022
// https://www.sljfaq.org/afaq/encodings.html#encodings-ISO-2022-JP
try {
Charset.forName("ISO-2022-JP");
} catch (UnsupportedCharsetException ex) {
return false;
}
int c;
int escapes = 0;
boolean escaped = false;
boolean parenthesis = false;
boolean dollar = false;
byte[] octets = text.getBytes(StandardCharsets.ISO_8859_1);
for (byte b : octets) {
c = b & 0xFF;
if (c > 0x7F)
return false;
if (escaped) {
escaped = false;
if (c == '(')
parenthesis = true;
else if (c == '$')
dollar = true;
} else if (parenthesis) {
parenthesis = false;
if (c == 'B' || c == 'J')
escapes++;
} else if (dollar) {
dollar = false;
if (c == '@' || c == 'B')
escapes++;
} else if (c == 0x1B)
escaped = true;
if (escapes >= 3)
return true;
}
return false;
}
static Charset detect(String text) { static Charset detect(String text) {
try { try {
byte[] octets = text.getBytes(StandardCharsets.ISO_8859_1); byte[] octets = text.getBytes(StandardCharsets.ISO_8859_1);