/**
* Creates a new <code>DictionaryNameFactory</code>.
*
* @param file the file from which the names can be read.
* @param nameFactory the name factory from which names will be retrieved if the list of read
* names has been exhausted.
*/
public DictionaryNameFactory(File file, NameFactory nameFactory) throws IOException {
this.names = new ArrayList();
this.nameFactory = nameFactory;
Reader reader = new FileReader(file);
try {
StringBuffer buffer = new StringBuffer();
while (true) {
// Read the next character.
int c = reader.read();
// Is it a valid identifier character?
if (c != -1
&& (buffer.length() == 0
? Character.isJavaIdentifierStart((char) c)
: Character.isJavaIdentifierPart((char) c))) {
// Append it to the current identifier.
buffer.append((char) c);
} else {
// Did we collect a new identifier?
if (buffer.length() > 0) {
// Add the completed name to the list of names, if it's
// not in it yet.
String name = buffer.toString();
if (!names.contains(name)) {
names.add(name);
}
// Clear the buffer.
buffer.setLength(0);
}
// Is this the beginning of a comment line?
if (c == COMMENT_CHARACTER) {
// Skip all characters till the end of the line.
do {
c = reader.read();
} while (c != -1 && c != '\n' && c != '\r');
}
// Is this the end of the file?
if (c == -1) {
// Just return.
return;
}
}
}
} finally {
reader.close();
}
}
public static String getJavaIdentifier(String candidateID) {
int len = candidateID.length();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < len; i++) {
char ch = candidateID.charAt(i);
boolean good =
i == 0 ? Character.isJavaIdentifierStart(ch) : Character.isJavaIdentifierPart(ch);
if (good) {
buf.append(ch);
} else {
buf.append('_');
}
}
return buf.toString();
}
public static boolean isJavaIdentifier(String id) {
if (id == null) {
return false;
}
int len = id.length();
if (len == 0) {
return false;
}
if (!Character.isJavaIdentifierStart(id.charAt(0))) {
return false;
}
for (int i = 1; i < len; i++) {
if (!Character.isJavaIdentifierPart(id.charAt(i))) {
return false;
}
}
return true;
}
String readSymbol() {
StringBuffer sbuf = new StringBuffer();
while (index < s.length()) {
char c = s.charAt(index);
if (sbuf.length() == 0) {
if (!Character.isJavaIdentifierStart(c)) {
abortPrefetch();
}
} else {
if (!Character.isJavaIdentifierPart(c)) {
return sbuf.toString();
}
}
index++;
sbuf.append(c);
}
if (sbuf.length() == 0) {
abortPrefetch();
}
return sbuf.toString();
}
/** Returns the next lexical token in the document. */
public int nextToken() {
int c;
fStartToken = fPos;
while (true) {
switch (c = read()) {
case EOF:
return EOF;
case '/': // comment
c = read();
if (c == '/') {
while (true) {
c = read();
if ((c == EOF) || (c == EOL)) {
unread(c);
return COMMENT;
}
}
} else {
unread(c);
}
return OTHER;
case '\'': // char const
character:
for (; ; ) {
c = read();
switch (c) {
case '\'':
return STRING;
case EOF:
unread(c);
return STRING;
case '\\':
c = read();
break;
}
}
case '"': // string
string:
for (; ; ) {
c = read();
switch (c) {
case '"':
return STRING;
case EOF:
unread(c);
return STRING;
case '\\':
c = read();
break;
}
}
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
do {
c = read();
} while (Character.isDigit((char) c));
unread(c);
return NUMBER;
default:
if (Character.isWhitespace((char) c)) {
do {
c = read();
} while (Character.isWhitespace((char) c));
unread(c);
return WHITE;
}
if (Character.isJavaIdentifierStart((char) c)) {
fBuffer.setLength(0);
do {
fBuffer.append((char) c);
c = read();
} while (Character.isJavaIdentifierPart((char) c));
unread(c);
Integer i = (Integer) fgKeys.get(fBuffer.toString());
if (i != null) return i.intValue();
return WORD;
}
return OTHER;
}
}
}
public static void main(String args[]) throws FileNotFoundException, IOException {
System.out.println("Gathering data...");
// Use char[] for ease in building strings, despite only using 8 bits.
int numElements = 65536;
char[] info = new char[numElements];
for (int i = 0; i < info.length; i++) {
if (i == '\n' || i == '\r') info[i] = NEWLINE_CODE;
else if (i == ' ' || i == '\t' || i == '\f') info[i] = SPACE_CODE;
else if (i < 128 && Character.isLowerCase((char) i)) info[i] = LOWER_CODE; // Ascii lower case
else if (i < 128 && Character.isUpperCase((char) i)) info[i] = UPPER_CODE; // Ascii upper case
else if (i < 128 && Character.isDigit((char) i)) info[i] = DIGIT_CODE; // Ascii digit
else if (Character.isJavaIdentifierStart((char) i)) info[i] = OTHER_LETTER_CODE;
else if (Character.isJavaIdentifierPart((char) i)) info[i] = OTHER_DIGIT_CODE;
else {
info[i] = BAD_CODE;
numElements--;
}
}
System.out.println("Compressing tables...");
int bestShift = 0;
int bestEst = info.length;
String bestBlkStr = null;
for (int i = 3; i < 11; i++) {
int blkSize = 1 << i;
Map blocks = new HashMap();
List blkArray = new ArrayList();
System.out.print("shift: " + i);
for (int j = 0; j < info.length; j += blkSize) {
String key = new String(info, j, blkSize);
if (blocks.get(key) == null) {
blkArray.add(key);
blocks.put(key, new Integer(blkArray.size()));
}
}
int blkNum = blkArray.size();
int blockLen = blkNum * blkSize;
System.out.print(" before " + blockLen);
//
// Try to pack blkArray, by finding successively smaller matches
// between heads and tails of blocks.
//
for (int j = blkSize - 1; j > 0; j--) {
Map tails = new HashMap();
for (int k = 0; k < blkArray.size(); k++) {
String str = (String) blkArray.get(k);
if (str == null) continue;
String tail = str.substring(str.length() - j);
List l = (List) tails.get(tail);
if (l == null) tails.put(tail, new LinkedList(Collections.singleton(new Integer(k))));
else l.add(new Integer(k));
}
//
// Now calculate the heads, and merge overlapping blocks
//
block:
for (int k = 0; k < blkArray.size(); k++) {
String tomerge = (String) blkArray.get(k);
if (tomerge == null) continue;
while (true) {
String head = tomerge.substring(0, j);
LinkedList entry = (LinkedList) tails.get(head);
if (entry == null) continue block;
Integer other = (Integer) entry.removeFirst();
if (other.intValue() == k) {
if (entry.size() > 0) {
entry.add(other);
other = (Integer) entry.removeFirst();
} else {
entry.add(other);
continue block;
}
}
if (entry.size() == 0) tails.remove(head);
//
// A match was found.
//
String merge = blkArray.get(other.intValue()) + tomerge.substring(j);
blockLen -= j;
blkNum--;
if (other.intValue() < k) {
blkArray.set(k, null);
blkArray.set(other.intValue(), merge);
String tail = merge.substring(merge.length() - j);
List l = (List) tails.get(tail);
Collections.replaceAll(l, new Integer(k), other);
continue block;
}
blkArray.set(k, merge);
blkArray.set(other.intValue(), null);
tomerge = merge;
}
}
}
StringBuffer blockStr = new StringBuffer(blockLen);
for (int k = 0; k < blkArray.size(); k++) {
String str = (String) blkArray.get(k);
if (str != null) blockStr.append(str);
}
if (blockStr.length() != blockLen) throw new Error("Unexpected blockLen " + blockLen);
int estimate = blockLen + (info.length >> (i - 1));
System.out.println(" after merge " + blockLen + ": " + estimate + " bytes");
if (estimate < bestEst) {
bestEst = estimate;
bestShift = i;
bestBlkStr = blockStr.toString();
}
}
int blkSize = 1 << bestShift;
char[] blocks = new char[info.length / blkSize];
for (int j = 0; j < info.length; j += blkSize) {
String key = new String(info, j, blkSize);
int index = bestBlkStr.indexOf(key);
if (index == -1) throw new Error("Unexpected index for " + j);
blocks[j >> bestShift] = (char) (index - j);
}
//
// Process the code.h file
//
System.out.println("Generating code.h with shift of " + bestShift);
PrintStream hfile = new PrintStream(new FileOutputStream("code.h"));
printHeader(hfile, new String[] {"\"platform.h\""});
hfile.println("#ifndef code_INCLUDED");
hfile.println("#define code_INCLUDED");
hfile.println();
hfile.println("class Code");
hfile.println("{");
hfile.println(" //");
hfile.println(" // To facilitate the scanning, the character set is partitioned into");
hfile.println(" // 8 categories using the array CODE. These are described below");
hfile.println(" // together with some self-explanatory functions defined on CODE.");
hfile.println(" //");
hfile.println(" enum {");
hfile.println(" SHIFT = " + bestShift + ",");
hfile.println(" NEWLINE_CODE = " + NEWLINE_CODE + ',');
hfile.println(" SPACE_CODE = " + SPACE_CODE + ',');
hfile.println(" BAD_CODE = " + BAD_CODE + ',');
hfile.println(" DIGIT_CODE = " + DIGIT_CODE + ',');
hfile.println(" OTHER_DIGIT_CODE = " + OTHER_DIGIT_CODE + ',');
hfile.println(" LOWER_CODE = " + LOWER_CODE + ',');
hfile.println(" UPPER_CODE = " + UPPER_CODE + ',');
hfile.println(" OTHER_LETTER_CODE = " + OTHER_LETTER_CODE);
hfile.println(" };");
hfile.println();
hfile.println(" static char codes[" + bestBlkStr.length() + "];");
hfile.println(" static u2 blocks[" + blocks.length + "];");
hfile.println();
hfile.println();
hfile.println("public:");
hfile.println();
hfile.println(" static inline void SetBadCode(wchar_t c)");
hfile.println(" {");
hfile.println(" codes[(u2) (blocks[c >> SHIFT] + c)] = BAD_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline void CodeCheck(wchar_t c)");
hfile.println(" {");
hfile.println(" assert((u2) (blocks[c >> SHIFT] + c) < " + bestBlkStr.length() + ");");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool CodeCheck(void)");
hfile.println(" {");
hfile.println(" for (int i = 0; i <= 0xffff; i++)");
hfile.println(" CodeCheck((wchar_t) i);");
hfile.println(" return true;");
hfile.println(" }");
hfile.println();
hfile.println(" //");
hfile.println(" // \\r characters are replaced by \\x0a in Stream::ProcessInput().");
hfile.println(" //");
hfile.println(" static inline bool IsNewline(wchar_t c)");
hfile.println(" {");
hfile.println(" return c == '\\x0a';");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsSpaceButNotNewline(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] == SPACE_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsSpace(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] <= SPACE_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsDigit(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] == DIGIT_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsOctalDigit(wchar_t c)");
hfile.println(" {");
hfile.println(" return c >= U_0 && c <= U_7;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsHexDigit(wchar_t c)");
hfile.println(" {");
hfile.println(" return c <= U_f && (c >= U_a ||");
hfile.println(" (c >= U_A && c <= U_F) ||");
hfile.println(" (c >= U_0 && c <= U_9));");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsUpper(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] == UPPER_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsLower(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] == LOWER_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsAlpha(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] >= LOWER_CODE;");
hfile.println(" }");
hfile.println();
hfile.println(" static inline bool IsAlnum(wchar_t c)");
hfile.println(" {");
hfile.println(" return codes[(u2) (blocks[c >> SHIFT] + c)] >= DIGIT_CODE;");
hfile.println(" }");
hfile.println();
hfile.println("};");
hfile.println();
hfile.println("#endif // code_INCLUDED");
printFooter(hfile);
hfile.close();
//
// Process the code.cpp file
//
System.out.println("Generating code.cpp");
PrintStream cfile = new PrintStream(new FileOutputStream("code.cpp"));
printHeader(cfile, new String[] {"\"code.h\""});
cfile.println("char Code::codes[" + bestBlkStr.length() + "] =");
cfile.println("{");
for (int j = 0; j < bestBlkStr.length(); j += 4) {
for (int k = 0; k < 4; k++) {
if (k + j >= bestBlkStr.length()) break;
if (k == 0) cfile.print(" ");
cfile.print(" " + CODE_NAMES[bestBlkStr.charAt(k + j)] + ",");
}
cfile.println();
}
cfile.println("};");
cfile.println();
cfile.println();
cfile.println("//");
cfile.println("// The Blocks vector:");
cfile.println("//");
cfile.println("u2 Code::blocks[" + blocks.length + "] =");
cfile.println("{");
for (int k = 0; k < blocks.length; k += 9) {
for (int i = 0; i < 9; i++) {
if (k + i >= blocks.length) break;
if (i == 0) cfile.print(" ");
cfile.print(" 0x" + Integer.toHexString(blocks[k + i]) + ",");
}
cfile.println();
}
cfile.println("};");
printFooter(cfile);
cfile.close();
//
// Print statistics.
//
System.out.println(
"Total static storage utilization is " + blocks.length * 2 + " bytes for block lookup");
System.out.println(" plus " + bestBlkStr.length() + " bytes for the encodings");
System.out.println(
"The number of unicode characters legal in Java sourcecode is " + numElements);
}