tupelo.io
Read/Write using DataInputStream/DataOutputStream & InputStream/OutputStream
->File
(->File arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Returns: File
Convert a String or Path arg to a File. Idempotent.
->Path
(->Path arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Returns: Path
Convert a String or File arg to a Path. Idempotent.
create-temp-directory
(create-temp-directory prefix)(create-temp-directory dir prefix)
Inputs: ([prefix :- (s/cond-pre File s/Str Path)] [dir :- (s/cond-pre File s/Str Path) prefix :- s/Str])
Returns: File
Creates a temporary directory with the given [`dir` and] prefix
create-temp-file
(create-temp-file prefix suffix)(create-temp-file dir prefix suffix)
Inputs: ([prefix :- s/Str suffix :- (s/maybe s/Str)] [dir :- (s/cond-pre File s/Str Path) prefix :- s/Str suffix :- (s/maybe s/Str)])
Returns: File
Given a Path dir unique ID string (e.g. 'my.dummy.file'), returns a java File object
for a temporary that will be deleted upon JVM exit.
data-output-stream?
(data-output-stream? arg)
Inputs: [arg]
Returns true if arg implements java.io.DataOutputStream
delete-directory-recursive
(delete-directory-recursive arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Recursively deletes a directory and all its contents. Returns count of objects deleted.
Idempotent in case dir is already deleted.
delete-file-if-exists
(delete-file-if-exists arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Returns: s/Bool
Deletes a file if it exists. Accepts String, File, or Path arg.
file-exists?
(file-exists? arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Returns: s/Bool
Returns true iff a file exists
File?
(File? arg)
Inputs: [arg :- s/Any]
Returns: s/Bool
Returns true iff arg is a java.io.File
mkdirs
(mkdirs arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Creates a directory and all parent dirs.
mkdirs-parent
(mkdirs-parent arg)
Inputs: [arg :- (s/cond-pre s/Str File Path)]
Creates all parent dirs of a file. Accepts String, File, or Path arg.
output-stream?
(output-stream? arg)
Inputs: [arg]
Returns true if arg implements java.io.OutputStream
Path?
(Path? arg)
Inputs: [arg :- s/Any]
Returns: s/Bool
Returns true iff arg is a java.io.Path
read-byte
(read-byte dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 1 byte (signed) from a DataInputStream
read-byte-unsigned
(read-byte-unsigned dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 1 byte (unsigned) from a DataInputStream
read-bytes
(read-bytes N input-stream)
Inputs: [N :- s/Int input-stream :- InputStream]
Reads N bytes from a DataInputStream, returning a byte array.
read-double
(read-double dis)
Inputs: [dis :- DataInputStream]
Returns: s/Num
Reads an 8 byte double-precision floating-point value from a DataInputStream
read-float
(read-float dis)
Inputs: [dis :- DataInputStream]
Returns: s/Num
Reads a 4 byte single-precision floating-point value from a DataInputStream
read-integer
(read-integer dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 4 bytes (signed) from a DataInputStream
read-integer-unsigned
(read-integer-unsigned dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 4 bytes (unsigned) from a DataInputStream
read-long
(read-long dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 8 bytes (signed) from a DataInputStream
read-long-unsigned
(read-long-unsigned dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 8 bytes (unsigned) from a DataInputStream, returning a BigInteger
read-short
(read-short dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 2 bytes (signed) from a DataInputStream
read-short-unsigned
(read-short-unsigned dis)
Inputs: [dis :- DataInputStream]
Returns: s/Int
Reads 2 bytes (unsigned) from a DataInputStream
read-string-bytes
(read-string-bytes nchars dis)
Inputs: [nchars :- s/Int dis :- DataInputStream]
Returns: s/Str
Reads nchars bytes from a DataInputStream, returning a String.
write-byte
(write-byte dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 1 byte (signed) to a DataOutputStream.
write-byte-unsigned
(write-byte-unsigned dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 1 byte (unsigned) to a DataOutputStream
write-bytes
(write-bytes out-stream bytarr)
Inputs: [out-stream :- OutputStream bytarr :- s/Any]
Writes a byte array to a DataOutputStream.
write-double
(write-double dos val)
Inputs: [dos :- DataOutputStream val :- s/Num]
Returns: s/Num
Writes an 8 byte double-precision floating-point value to a DataInputStream
write-float
(write-float dos val)
Inputs: [dos :- DataOutputStream val :- s/Num]
Returns: s/Num
Writes a 4 byte single-precision floating-point value to a DataInputStream
write-integer
(write-integer dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 4 bytes (signed) to a DataOutputStream
write-integer-unsigned
(write-integer-unsigned dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 4 bytes (signed) to a DataOutputStream
write-long
(write-long dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 8 bytes (signed) to a DataOutputStream
write-long-unsigned
(write-long-unsigned dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 8 bytes (unsigned) to a DataOutputStream
write-short
(write-short dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 2 bytes (signed) to a DataOutputStream
write-short-unsigned
(write-short-unsigned dos val)
Inputs: [dos :- DataOutputStream val :- s/Int]
Returns: s/Int
Writes 2 bytes (unsigned) to a DataOutputStream
write-string-bytes
(write-string-bytes dos str-val)
Inputs: [dos :- DataOutputStream str-val :- s/Str]
Returns: s/Str
Converts an ASCII String to bytes and writes them to a DataInputStream (w/o length header).