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Add better support for invalid strings and chars

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git-svn-id: https://smali.googlecode.com/svn/trunk@746 55b6fa8a-2a1e-11de-a435-ffa8d773f76a
This commit is contained in:
JesusFreke@JesusFreke.com 2010-06-13 20:33:16 +00:00
parent 8136408a58
commit b9f0c569ea
1 changed files with 32 additions and 1 deletions
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33
smali/src/main/jflex/smaliLexer.flex
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@ -17,6 +17,7 @@ import static org.jf.smali.smaliParser.*;
%{
private StringBuffer sb = new StringBuffer();
private String stringOrCharError = null;
private int stringStartLine;
private int stringStartCol;
private int stringStartChar;
@ -97,11 +98,16 @@ import static org.jf.smali.smaliParser.*;
stringStartLine = getLine();
stringStartCol = getColumn();
stringStartChar = yychar;
stringOrCharError = null;
}
private Token endStringOrChar(int type) {
yybegin(YYINITIAL);
if (stringOrCharError != null) {
return invalidStringOrChar(stringOrCharError);
}
CommonToken token = new CommonToken(type, sb.toString());
token.setStartIndex(stringStartChar);
token.setStopIndex(yychar + yylength() - 1);
@ -110,6 +116,12 @@ import static org.jf.smali.smaliParser.*;
return token;
}
private void setStringOrCharError(String message) {
if (stringOrCharError == null) {
stringOrCharError = message;
}
}
private Token invalidStringOrChar(String message) {
yybegin(YYINITIAL);
@ -130,6 +142,7 @@ HexPrefix = 0 [xX]
HexDigit = [0-9a-fA-F]
HexDigits = [0-9a-fA-F]{4}
FewerHexDigits = [0-9a-fA-F]{0,3}
Integer1 = 0
Integer2 = [1-9] [0-9]*
@ -247,7 +260,15 @@ Type = {PrimitiveType} | {ClassDescriptor} | {ArrayDescriptor}
"\\\\" { sb.append('\\'); }
"\\u" {HexDigits} { sb.append((char)Integer.parseInt(yytext().substring(2,6), 16)); }
/*TODO: Handle embedded newlines. error or non-error?*/
"\\u" {FewerHexDigits} {
sb.append(yytext());
setStringOrCharError("Invalid \\u sequence. \\u must be followed by 4 hex digits");
}
"\\" [^btnfr'\"\\u] {
sb.append(yytext());
setStringOrCharError("Invalid escape sequence " + yytext());
}
<<EOF>> { return invalidStringOrChar("Unterminated string literal"); }
}
@ -275,6 +296,16 @@ Type = {PrimitiveType} | {ClassDescriptor} | {ArrayDescriptor}
"\\\\" { sb.append('\\'); }
"\\u" {HexDigits} { sb.append((char)Integer.parseInt(yytext().substring(2,6), 16)); }
"\\u" {HexDigit}* {
sb.append(yytext());
setStringOrCharError("Invalid \\u sequence. \\u must be followed by exactly 4 hex digits");
}
"\\" [^btnfr'\"\\u] {
sb.append(yytext());
setStringOrCharError("Invalid escape sequence " + yytext());
}
<<EOF>> { return invalidStringOrChar("Unterminated character literal"); }
}