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hint types implemented

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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@902 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent 0a34c2eaaa
commit 12f0205840
1 changed files with 88 additions and 55 deletions
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  1. 143
      jode/jode/type/IntegerType.java

143
jode/jode/type/IntegerType.java
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@ -28,87 +28,106 @@ import jode.GlobalOptions;
* ints whose value is in byte resp. short range. They may be
* converted to B resp. S, but sometimes need an explicit cast.
*
* @author Jochen Hoenicke */
* @author Jochen Hoenicke
*/
public class IntegerType extends Type {
public static final int IT_I = 0x01;
public static final int IT_C = 0x02;
public static final int IT_S = 0x04;
public static final int IT_B = 0x08;
public static final int IT_Z = 0x10;
/* Order does matter:
* First type that is possible (and hinted) will be taken.
*/
public static final int IT_Z = 0x01;
public static final int IT_I = 0x02;
public static final int IT_C = 0x04;
public static final int IT_S = 0x08;
public static final int IT_B = 0x10;
public static final int IT_cS = 0x20;
public static final int IT_cB = 0x40;
private static final int NUM_TYPES = 7;
private static final int[] subTypes = {
/*Z*/ IT_Z,
/*I*/ IT_I|IT_C|IT_S|IT_B/*|IT_cS|IT_cB*/, /*C*/ IT_C,
/*S*/ IT_S|IT_B/*|IT_cS|IT_cB*/, /*B*/ IT_B/*|IT_cB*/,
/*Z*/ IT_Z,
/*cS*/IT_cS|IT_cB, /*cB*/IT_cB
};
private static final int[] superTypes = {
/*Z*/ IT_Z,
/*I*/ IT_I, /*C*/ IT_I|IT_C,
/*S*/ IT_I|IT_S, /*B*/ IT_I|IT_S|IT_B,
/*Z*/ IT_Z,
/*cS*/IT_I|IT_C|IT_S|IT_cS, /*cB*/IT_I|IT_C|IT_S|IT_B|IT_cS|IT_cB
};
private static final Type[] simpleTypes = {
new IntegerType(IT_Z),
new IntegerType(IT_I), new IntegerType(IT_C),
new IntegerType(IT_S), new IntegerType(IT_B),
new IntegerType(IT_Z),
new IntegerType(IT_cS), new IntegerType(IT_cB)
};
private static final String[] typeNames = {
"I","C","S","B","Z","cS","cB"
"Z","I","C","S","B","s","b"
};
int possTypes;
int strongHint = 0;
int weakHint = 0;
int hintTypes;
/**
* Create a new type with the given type.
*/
public IntegerType(int types) {
this(types, types);
}
public IntegerType(int types, int hints) {
super(TC_INTEGER);
possTypes = types;
hintTypes = hints;
}
public Type getHint() {
int hint = ((possTypes & IT_Z) != 0 ? IT_Z
: strongHint != 0 ? strongHint
: weakHint != 0 ? weakHint
: possTypes);
int hint = possTypes & hintTypes;
if (hint == 0)
hint = possTypes;
int i = 0;
for (int it = 0x1; (it & hint) == 0; it <<= 1)
while ((hint & 1) == 0) {
hint >>= 1;
i++;
}
return simpleTypes[i];
}
private int getSubTypes() {
public Type getCanonic() {
int types = possTypes;
int i = 0;
while ((types >>= 1) != 0) {
i++;
}
return simpleTypes[i];
}
private static int getSubTypes(int types) {
int result = 0;
for (int i=0; i < NUM_TYPES; i++) {
if (((1<<i) & possTypes) != 0)
if (((1<<i) & types) != 0)
result |= subTypes[i];
}
return result;
}
private int getSuperTypes() {
private static int getSuperTypes(int types) {
int result = 0;
for (int i=0; i < NUM_TYPES; i++) {
if (((1<<i) & possTypes) != 0)
if (((1<<i) & types) != 0)
result |= superTypes[i];
}
return result;
}
public Type getSubType() {
return new IntegerType(getSubTypes());
return new IntegerType(getSubTypes(possTypes),
getSubTypes(hintTypes));
}
public Type getSuperType() {
return new IntegerType(getSuperTypes());
/* Don't upgrade hints */
return new IntegerType(getSuperTypes(possTypes), hintTypes);
}
/**
@ -181,28 +200,34 @@ public class IntegerType extends Type {
}
public String toString() {
switch (possTypes) {
case IT_Z:
return "boolean";
case IT_C:
return "char";
case IT_B:
return "byte";
case IT_S:
return "short";
case IT_I:
return "int";
default:
StringBuffer sb = new StringBuffer("{");
String comma = "";
for (int i=0; i< NUM_TYPES; i++)
if (((1<<i) & possTypes) != 0) {
sb.append(comma).append(typeNames[i]);
comma = ",";
}
sb.append("}");
return sb.toString();
}
if (possTypes == hintTypes) {
switch (possTypes) {
case IT_Z:
return "boolean";
case IT_C:
return "char";
case IT_B:
return "byte";
case IT_S:
return "short";
case IT_I:
return "int";
}
}
StringBuffer sb = new StringBuffer("{");
for (int i=0; i< NUM_TYPES; i++) {
if (((1<<i) & possTypes) != 0)
sb.append(typeNames[i]);
}
if (possTypes != hintTypes) {
sb.append(":");
for (int i=0; i< NUM_TYPES; i++) {
if (((1<<i) & hintTypes) != 0)
sb.append(typeNames[i]);
}
}
sb.append("}");
return sb.toString();
}
/**
@ -217,21 +242,26 @@ public class IntegerType extends Type {
return this;
int mergeTypes;
int mergeHints = 0;
if (type.typecode != TC_INTEGER)
mergeTypes = 0;
else {
IntegerType other = (IntegerType) type;
mergeTypes = possTypes & other.possTypes;
/* HINTING XXX */
if (mergeTypes == possTypes)
mergeHints = hintTypes & other.hintTypes;
if (mergeTypes == possTypes
&& mergeHints == hintTypes)
return this;
if (mergeTypes == other.possTypes)
if (mergeTypes == other.possTypes
&& mergeHints == other.hintTypes)
return other;
}
Type result = mergeTypes == 0 ? tError : new IntegerType(mergeTypes);
Type result = mergeTypes == 0
? tError : new IntegerType(mergeTypes, mergeHints);
if ((GlobalOptions.debuggingFlags & GlobalOptions.DEBUG_TYPES) != 0) {
GlobalOptions.err.println("intersecting "+ this +" and "+ type +
" to " + result);
" to " + result);
}
return result;
}
@ -239,8 +269,11 @@ public class IntegerType extends Type {
public boolean equals(Object o) {
if (o == this)
return true;
if (o instanceof IntegerType)
return ((IntegerType)o).possTypes == possTypes;
if (o instanceof IntegerType) {
IntegerType other = (IntegerType)o;
return other.possTypes == possTypes
&& other.hintTypes == hintTypes;
}
return false;
}
}

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