LegacyConsole/jpexs-decompiler
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constant pool editing: escape strings

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This commit is contained in:
honfika@gmail.com
2015-05-08 14:01:44 +02:00
parent e49296770f
commit c5a890fce7
24 changed files with 181 additions and 57 deletions
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124
libsrc/ffdec_lib/src/com/jpexs/helpers/Helper.java
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@@ -181,8 +181,38 @@ public class Helper {
ret.append("\\t");
} else if (c == '\b') {
ret.append("\\b");
} else if (c == '\f') {
ret.append("\\f");
} else if (c == '\\') {
ret.append("\\\\");
} else if (c < 32) {
ret.append("\\x").append(padZeros(Integer.toHexString((int) c), 2));
} else {
ret.append(c);
}
}
return ret.toString();
}
/**
* Escapes string by adding backslashes
*
* @param s String to escape
* @return Escaped string
*/
public static String escapeActionScriptString(String s) {
StringBuilder ret = new StringBuilder(s.length());
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c == '\n') {
ret.append("\\n");
} else if (c == '\r') {
ret.append("\\r");
} else if (c == '\t') {
ret.append("\\t");
} else if (c == '\b') {
ret.append("\\b");
} else if (c == '\f') {
ret.append("\\f");
} else if (c == '\\') {
@@ -219,8 +249,6 @@ public class Helper {
ret.append("\\t");
} else if (c == '\b') {
ret.append("\\b");
} else if (c == '\t') {
ret.append("\\t");
} else if (c == '\f') {
ret.append("\\f");
} else if (c == '\\') {
@@ -237,6 +265,96 @@ public class Helper {
return ret.toString();
}
/**
* Unescapes a string that contains standard Java escape sequences.
* <ul>
* <li><strong>&#92;b &#92;f &#92;n &#92;r &#92;t &#92;" &#92;'</strong> :
* BS, FF, NL, CR, TAB, double and single quote.</li>
* <li><strong>&#92;X &#92;XX &#92;XXX</strong> : Octal character
* specification (0 - 377, 0x00 - 0xFF).</li>
* <li><strong>&#92;uXXXX</strong> : Hexadecimal based Unicode
* character.</li>
* </ul>
*
* @param st
* A string optionally containing standard java escape sequences.
* @return The translated string.
*/
public static String unescapeJavaString(String st) {
StringBuilder sb = new StringBuilder(st.length());
for (int i = 0; i < st.length(); i++) {
char ch = st.charAt(i);
if (ch == '\\') {
char nextChar = (i == st.length() - 1) ? '\\' : st
.charAt(i + 1);
// Octal escape?
if (nextChar >= '0' && nextChar <= '7') {
String code = "" + nextChar;
i++;
if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
&& st.charAt(i + 1) <= '7') {
code += st.charAt(i + 1);
i++;
if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
&& st.charAt(i + 1) <= '7') {
code += st.charAt(i + 1);
i++;
}
}
sb.append((char) Integer.parseInt(code, 8));
continue;
}
switch (nextChar) {
case '\\':
ch = '\\';
break;
case 'b':
ch = '\b';
break;
case 'f':
ch = '\f';
break;
case 'n':
ch = '\n';
break;
case 'r':
ch = '\r';
break;
case 't':
ch = '\t';
break;
case '\"':
ch = '\"';
break;
case '\'':
ch = '\'';
break;
// Hex Unicode: u????
case 'u':
if (i >= st.length() - 5) {
ch = 'u';
break;
}
int code = Integer.parseInt(
"" + st.charAt(i + 2) + st.charAt(i + 3)
+ st.charAt(i + 4) + st.charAt(i + 5), 16);
sb.append(Character.toChars(code));
i += 5;
continue;
}
i++;
}
sb.append(ch);
}
return sb.toString();
}
public static String getValidHtmlId(String text) {
// ID and NAME tokens must begin with a letter ([A-Za-z]) and
// may be followed by any number of letters, digits ([0-9]),
@@ -863,7 +981,7 @@ public class Helper {
String[] parts = line.split("\\|", 2);
if (parts.length >= 2) {
cPool.add(parts[1]);
cPool.add(unescapeJavaString(parts[1]));
}
}