|
|||||||||
| Home >> All >> [ silk overview ] | PREV CLASS NEXT CLASS | ||||||||
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||
silk
Class U
java.lang.Objectsilk.U
- public abstract class U
- extends java.lang.Object
| Field Summary | |
private static java.lang.Character[] |
cachedCharacters
|
private static java.lang.Integer[] |
cachedNegInts
|
private static java.lang.Integer[] |
cachedPosInts
|
static java.lang.Object[] |
EMPTY_ARGS
|
static java.lang.Boolean |
FALSE
Same as Boolean.FALSE. |
static Symbol |
MISSING
The value to use when a parameter is not supplied to a procedure. |
static java.lang.Object[] |
NO_ARGS
An argument list with zero arguments. |
private static int |
NUM_CACHED
Number of chars, positive, negative ints to cache. |
static java.lang.Double |
ONE
A Double with value 1.0. |
static java.lang.Boolean |
TRUE
Same as Boolean.TRUE. |
static Symbol |
UNDEFINED
The value to return when a variable is not defined. |
static boolean |
useJavaSyntax
a flag which specifies whether Java (or Scheme) syntax should be used when printing Scheme terms |
static java.lang.Object[] |
VECTOR0
|
static java.lang.Double |
ZERO
A Double with value 0.0. |
| Constructor Summary | |
U()
|
|
| Method Summary | |
static java.lang.Object |
append(java.lang.Object x,
java.lang.Object y)
|
static java.lang.Object |
append(Pair args)
|
static Pair |
arrayToList(java.lang.Object x)
|
static java.lang.Object |
callCC(Procedure k)
A continuation exception is a specially marked RuntimeException. |
static java.lang.Object |
callWithInputFile(java.lang.Object filename,
Procedure proc)
|
static java.lang.Object |
callWithOutputFile(java.lang.Object filename,
Procedure proc)
|
static boolean |
checkNargs(int min,
int max,
int given,
java.lang.Object form)
Check that the form has between min and max arguments (exclusive of the first element of the form). |
static boolean |
equal(java.lang.Object x,
java.lang.Object y)
Check if two objects are equal. |
static boolean |
eqv(java.lang.Object x,
java.lang.Object y)
Check if two objects are == or are equal numbers, characters, or booleans. |
static java.lang.Object |
error(java.lang.String message)
Print an error message and then throw a RuntimeException. |
static java.lang.Object |
error(java.lang.String message,
java.lang.Object x)
Print an error message, followed by the printed representation for x. |
static java.lang.Object |
first(java.lang.Object x)
Return the first element of a Pair, or error. |
(package private) static long |
gcd(long a,
long b)
|
static long |
gcd(Pair args)
|
static boolean |
isList(java.lang.Object x)
Return true if x is a proper list: null-terminated and finite. |
static boolean |
isPair(java.lang.Object x)
Check if the argument is a non-empty list. |
(package private) static long |
lcm(java.lang.Object args)
|
static Pair |
list(java.lang.Object a)
Creates a one element list. |
static Pair |
list(java.lang.Object a,
java.lang.Object b)
Creates a two element list. |
static Pair |
list(java.lang.Object a,
java.lang.Object b,
java.lang.Object c)
Creates a three element list. |
static java.lang.Object |
listToArray(java.lang.Class C,
java.lang.Object x)
|
static java.lang.String |
listToString(java.lang.Object chars)
Convert a list of characters to a String. |
static java.lang.Object[] |
listToVector(java.lang.Object x)
|
static java.lang.String |
makeString(int size,
java.lang.Object fill)
|
static Pair |
map(Procedure proc,
java.lang.Object args,
Pair result)
Map proc over a list of lists of args. |
static java.lang.Object |
memberAssoc(java.lang.Object obj,
java.lang.Object list,
boolean member,
int eq)
|
static java.lang.Object |
numberToString(java.lang.Object x,
java.lang.Object y)
|
static java.lang.Object |
numCompute(double result,
Pair args,
char op)
Compute (result op arg1 op arg2 op ...). |
static java.lang.Object |
numCompute(long result,
Pair args,
char op)
Compute (result op arg1 op arg2 op ...). |
static java.lang.Object |
numCompute(java.lang.Object x,
Pair args,
char op)
Compute (x op arg1 op arg2 op ...), in ints or doubles. |
static InputPort |
openInputFile(java.lang.Object filename)
|
static java.io.PrintWriter |
openOutputFile(java.lang.Object filename)
|
static java.lang.Object |
p(java.lang.String x,
java.lang.Object y)
Used for debugging. |
static java.lang.Object |
rest(java.lang.Object x)
Return the rest of a Pair, or error. |
static java.lang.Object |
second(java.lang.Object x)
Return the second element of a list. |
static java.lang.String |
stringAppend(Pair args)
|
static int |
stringCompareIgnoreCase(java.lang.Object x,
java.lang.Object y)
Return <0 if x is alphabetically first, >0 if y is first, 0 if same. |
static java.lang.String |
stringify(java.lang.Object x)
Convert x to a String giving its external representation. |
static java.lang.String |
stringify(java.lang.Object x,
boolean quoted)
Convert x to a String giving its external representation. |
static java.lang.StringBuffer |
stringify(java.lang.Object x,
boolean quoted,
java.lang.StringBuffer buf)
Convert a Scheme object to its printed representation, as a java String. |
private static void |
stringifyChar(java.lang.StringBuffer buf,
char ch,
boolean quoted)
|
static java.lang.Object |
stringToList(java.lang.Object x)
|
static java.lang.Object |
stringToNumber(java.lang.Object x,
java.lang.Object y)
|
static Pair |
timeCall(Procedure proc,
int nTimes)
Call the procedure repeatedly nTimes, and return a list of the the last result, the elapsed time, and the memory used. |
static boolean |
to_bool(java.lang.Object x)
Convert Scheme object to boolean. |
static char |
to_char(java.lang.Object x)
Converts a Character to a char, or calls error for non-Characters. |
static char |
to_lc_char(java.lang.Object x)
Converts a Character to a lowercase char, or calls error for non-Characters. |
static java.lang.Boolean |
toBool(boolean x)
Convert boolean to Boolean. |
static java.lang.Boolean |
toBool(java.lang.Object x)
Convert Scheme object to Boolean. |
static java.lang.Character |
toChar(char ch)
Converts a char to a Character. |
static java.lang.Class |
toClass(java.lang.Object c)
|
static InputPort |
toInPort(java.lang.Object x)
Cast a Scheme object to a Scheme input port, which is an InputPort. |
static int |
toInt(java.lang.Object x)
Converts a Scheme object to an int, or calls error. |
static int |
toInt(java.lang.Object x,
int defaultVal)
Converts a Scheme object to an int, return the default if it is not possible to convert the object to an int. |
static Pair |
toList(java.lang.Object x)
Cast a Scheme object to a Pair or the empty list. |
static java.lang.Double |
toNum(double x)
Convert double to Double. |
static java.lang.Integer |
toNum(int i)
Convert int to Integer. |
static java.lang.Number |
toNum(long i)
Convert long to Number, either Integer or Double. |
static java.io.PrintWriter |
toOutPort(java.lang.Object x)
C ast a Scheme object to a Scheme input port, which is a PrintWriter. |
static Pair |
toPair(java.lang.Object x)
Cast a Scheme object to a Pair (can't be the empty list). |
static Procedure |
toProc(java.lang.Object x)
Cast a Scheme object to a procedure, or call error. |
static double |
toReal(java.lang.Object x)
Converts a Scheme object to a double, or calls error. |
static java.lang.String |
toStr(java.lang.Object x)
Cast a Scheme object to a String, or call error. |
static Symbol |
toSym(java.lang.Object x)
Cast a Scheme object to a Scheme symbol, or call error. |
static java.lang.Object[] |
toVec(java.lang.Object x)
Cast a Scheme object to a Scheme vector, or call error. |
static java.lang.Object |
typeError(java.lang.String type,
java.lang.Object x)
Call error, complaining that we got the wrong type. |
static Pair |
vectorToList(java.lang.Object[] vec)
|
static java.lang.Object |
warn(java.lang.String message)
Print a warning. |
static java.lang.Object |
warn(java.lang.String message,
java.lang.Object x)
Print a warning. |
static java.lang.Object |
write(java.lang.Object x,
java.io.PrintWriter port,
boolean quoted)
Write the object to a port. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
useJavaSyntax
public static boolean useJavaSyntax
- a flag which specifies whether Java (or Scheme) syntax
should be used when printing Scheme terms
TRUE
public static final java.lang.Boolean TRUE
- Same as Boolean.TRUE.
FALSE
public static final java.lang.Boolean FALSE
- Same as Boolean.FALSE.
UNDEFINED
public static final Symbol UNDEFINED
- The value to return when a variable is not defined.
MISSING
public static final Symbol MISSING
- The value to use when a parameter is not supplied to a procedure.
NO_ARGS
public static final java.lang.Object[] NO_ARGS
- An argument list with zero arguments.
EMPTY_ARGS
public static final java.lang.Object[] EMPTY_ARGS
NUM_CACHED
private static final int NUM_CACHED
- Number of chars, positive, negative ints to cache.
- See Also:
- Constant Field Values
cachedCharacters
private static final java.lang.Character[] cachedCharacters
cachedPosInts
private static final java.lang.Integer[] cachedPosInts
cachedNegInts
private static final java.lang.Integer[] cachedNegInts
ZERO
public static final java.lang.Double ZERO
- A Double with value 0.0. Defined here so that we need only one.
ONE
public static final java.lang.Double ONE
- A Double with value 1.0. Defined here so that we need only one.
VECTOR0
public static final java.lang.Object[] VECTOR0
| Constructor Detail |
U
public U()
| Method Detail |
to_bool
public static boolean to_bool(java.lang.Object x)
- Convert Scheme object to boolean. Only #f is false, others are true.
toBool
public static java.lang.Boolean toBool(boolean x)
- Convert boolean to Boolean.
toBool
public static java.lang.Boolean toBool(java.lang.Object x)
- Convert Scheme object to Boolean. Only #f is false, others are true.
to_char
public static char to_char(java.lang.Object x)
- Converts a Character to a char, or calls error for non-Characters.
to_lc_char
public static char to_lc_char(java.lang.Object x)
- Converts a Character to a lowercase char, or calls error for non-Characters.
toChar
public static java.lang.Character toChar(char ch)
- Converts a char to a Character. Caches low-numbered chars.
toClass
public static java.lang.Class toClass(java.lang.Object c)
toNum
public static java.lang.Integer toNum(int i)
- Convert int to Integer. Caches small ints so that we only ever
make one copy of new Integer(0), new Integer(1), etc.
toNum
public static java.lang.Number toNum(long i)
- Convert long to Number, either Integer or Double.
toNum
public static java.lang.Double toNum(double x)
- Convert double to Double. Caches 0 and 1; makes new for others.
toReal
public static double toReal(java.lang.Object x)
- Converts a Scheme object to a double, or calls error.
toInt
public static int toInt(java.lang.Object x)
- Converts a Scheme object to an int, or calls error.
toInt
public static int toInt(java.lang.Object x, int defaultVal)
- Converts a Scheme object to an int, return the default
if it is not possible to convert the object to an int.
toStr
public static java.lang.String toStr(java.lang.Object x)
- Cast a Scheme object to a String, or call error.
toSym
public static Symbol toSym(java.lang.Object x)
- Cast a Scheme object to a Scheme symbol, or call error.
toVec
public static java.lang.Object[] toVec(java.lang.Object x)
- Cast a Scheme object to a Scheme vector, or call error.
toProc
public static Procedure toProc(java.lang.Object x)
- Cast a Scheme object to a procedure, or call error.
isPair
public static boolean isPair(java.lang.Object x)
- Check if the argument is a non-empty list.
toPair
public static Pair toPair(java.lang.Object x)
- Cast a Scheme object to a Pair (can't be the empty list).
toList
public static Pair toList(java.lang.Object x)
- Cast a Scheme object to a Pair or the empty list.
toInPort
public static InputPort toInPort(java.lang.Object x)
- Cast a Scheme object to a Scheme input port, which is an InputPort.
If the argument is missing, returns Scheme.input.
toOutPort
public static java.io.PrintWriter toOutPort(java.lang.Object x)
- C ast a Scheme object to a Scheme input port, which is a PrintWriter.
If the argument is missing, returns Scheme.output.
error
public static java.lang.Object error(java.lang.String message)
- Print an error message and then throw a RuntimeException.
Or maybe go into a loop ???
error
public static java.lang.Object error(java.lang.String message, java.lang.Object x)
- Print an error message, followed by the printed representation for x.
typeError
public static java.lang.Object typeError(java.lang.String type, java.lang.Object x)
- Call error, complaining that we got the wrong type.
warn
public static java.lang.Object warn(java.lang.String message)
- Print a warning.
warn
public static java.lang.Object warn(java.lang.String message, java.lang.Object x)
- Print a warning.
first
public static java.lang.Object first(java.lang.Object x)
- Return the first element of a Pair, or error.
rest
public static java.lang.Object rest(java.lang.Object x)
- Return the rest of a Pair, or error.
second
public static java.lang.Object second(java.lang.Object x)
- Return the second element of a list.
list
public static Pair list(java.lang.Object a, java.lang.Object b, java.lang.Object c)
- Creates a three element list.
list
public static Pair list(java.lang.Object a, java.lang.Object b)
- Creates a two element list.
list
public static Pair list(java.lang.Object a)
- Creates a one element list.
equal
public static boolean equal(java.lang.Object x, java.lang.Object y)
- Check if two objects are equal.
eqv
public static boolean eqv(java.lang.Object x, java.lang.Object y)
- Check if two objects are == or are equal numbers, characters, or
booleans.
write
public static java.lang.Object write(java.lang.Object x, java.io.PrintWriter port, boolean quoted)
- Write the object to a port. If quoted is true, use "str" and #\c,
otherwise use str and c.
checkNargs
public static boolean checkNargs(int min,
int max,
int given,
java.lang.Object form)
- Check that the form has between min and max arguments (exclusive
of the first element of the form). If the form has the wrong
number of arguments, then complain.
stringify
public static java.lang.StringBuffer stringify(java.lang.Object x, boolean quoted, java.lang.StringBuffer buf)
- Convert a Scheme object to its printed representation, as a java
String. If quoted is true, use "str" and #\c, otherwise use str and
c. You need to pass in a StringBuffer that is used to accumulate the
results. (If the interface didn't work that way, the system would use
lots of little internal StringBuffers. But note that you can still call
stringify(x) and a new StringBuffer will be created for you.
If useJavaSyntax is true, then literals are printed using a Java syntax
stringifyChar
private static void stringifyChar(java.lang.StringBuffer buf, char ch, boolean quoted)
stringify
public static java.lang.String stringify(java.lang.Object x)
- Convert x to a String giving its external representation.
Strings and characters are quoted.
stringify
public static java.lang.String stringify(java.lang.Object x, boolean quoted)
- Convert x to a String giving its external representation.
Strings and characters are quoted iff quoted is true..
makeString
public static java.lang.String makeString(int size, java.lang.Object fill)
stringAppend
public static java.lang.String stringAppend(Pair args)
memberAssoc
public static java.lang.Object memberAssoc(java.lang.Object obj, java.lang.Object list, boolean member, int eq)
numCompute
public static java.lang.Object numCompute(java.lang.Object x, Pair args, char op)
- Compute (x op arg1 op arg2 op ...), in ints or doubles.
numCompute
public static java.lang.Object numCompute(long result, Pair args, char op)
- Compute (result op arg1 op arg2 op ...). Return the result
as an Object, but along the way, use result (a long) as an accumulator of
the result so far. For compare ops, returns FALSE for false, and
a number for true.
numCompute
public static java.lang.Object numCompute(double result, Pair args, char op)
- Compute (result op arg1 op arg2 op ...). Return the result
as an Object, but along the way, use result (a double) as an accumulator of
the result so far. For compare ops, returns FALSE for false, and
a number for true.
numberToString
public static java.lang.Object numberToString(java.lang.Object x, java.lang.Object y)
stringToNumber
public static java.lang.Object stringToNumber(java.lang.Object x, java.lang.Object y)
stringToList
public static java.lang.Object stringToList(java.lang.Object x)
vectorToList
public static Pair vectorToList(java.lang.Object[] vec)
listToVector
public static java.lang.Object[] listToVector(java.lang.Object x)
listToArray
public static java.lang.Object listToArray(java.lang.Class C, java.lang.Object x)
arrayToList
public static Pair arrayToList(java.lang.Object x)
listToString
public static java.lang.String listToString(java.lang.Object chars)
- Convert a list of characters to a String.
stringCompareIgnoreCase
public static int stringCompareIgnoreCase(java.lang.Object x, java.lang.Object y)
- Return <0 if x is alphabetically first, >0 if y is first,
0 if same. Case insensitive iff ci is true. Error if not strings.
NOTE: In Java 2, just use String.CompareIgnorecase. But that
method is missing in Java 1.0 and 1.1.
gcd
public static long gcd(Pair args)
gcd
static long gcd(long a,
long b)
lcm
static long lcm(java.lang.Object args)
openOutputFile
public static java.io.PrintWriter openOutputFile(java.lang.Object filename)
openInputFile
public static InputPort openInputFile(java.lang.Object filename)
callWithInputFile
public static java.lang.Object callWithInputFile(java.lang.Object filename, Procedure proc)
callWithOutputFile
public static java.lang.Object callWithOutputFile(java.lang.Object filename, Procedure proc)
isList
public static boolean isList(java.lang.Object x)
- Return true if x is a proper list: null-terminated and finite.
Return false if it is an infinite or non-null-terminated list.
Not to be confused with (or (pair? x) (null? x)).
append
public static java.lang.Object append(Pair args)
append
public static java.lang.Object append(java.lang.Object x, java.lang.Object y)
callCC
public static java.lang.Object callCC(Procedure k)
- A continuation exception is a specially marked RuntimeException.
map
public static Pair map(Procedure proc, java.lang.Object args, Pair result)
- Map proc over a list of lists of args.
If result is a passed in as a Pair, then accumulate values there.
Otherwise, just return the empty list.
timeCall
public static Pair timeCall(Procedure proc, int nTimes)
- Call the procedure repeatedly nTimes, and return a list of the
the last result, the elapsed time, and the memory used.
p
public static java.lang.Object p(java.lang.String x, java.lang.Object y)
- Used for debugging.
|
|||||||||
| Home >> All >> [ silk overview ] | PREV CLASS NEXT CLASS | ||||||||
|
SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||