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| ;Version 8.5 | | ;Version 8.5 |
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− | * Updated: <code>[[#convert:binary-to-string|convert:binary-to-string]]</code>: <code>$fallback</code> argument added. | + | * Updated: [[#convert:binary-to-string|convert:binary-to-string]]: $fallback argument added. |
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| ;Version 7.5 | | ;Version 7.5 |
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− | * Added: <code>[[#convert:integer-to-dateTime|convert:integer-to-dateTime]]</code>, <code>[[#convert:dateTime-to-integer|convert:dateTime-to-integer]]</code>, <code>[[#convert:integer-to-dayTime|convert:integer-to-dayTime]]</code>, <code>[[#convert:dayTime-to-integer|convert:dayTime-to-integer]]</code>. | + | * Added: [[#convert:integer-to-dateTime|convert:integer-to-dateTime]], [[#convert:dateTime-to-integer|convert:dateTime-to-integer]], [[#convert:integer-to-dayTime|convert:integer-to-dayTime]], [[#convert:dayTime-to-integer|convert:dayTime-to-integer]]. |
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| The module was introduced with Version 7.3. Some of the functions have been adopted from the obsolete Utility Module. | | The module was introduced with Version 7.3. Some of the functions have been adopted from the obsolete Utility Module. |
Revision as of 23:59, 12 June 2016
This XQuery Module contains functions to convert data between different formats.
Conventions
All functions in this module are assigned to the http://basex.org/modules/convert
namespace, which is statically bound to the convert
prefix.
All errors are assigned to the http://basex.org/errors
namespace, which is statically bound to the bxerr
prefix.
Strings
convert:binary-to-string
Template:Mark: $fallback
argument added.
Signatures
|
convert:binary-to-string($bytes as xs:anyAtomicType) as xs:string
convert:binary-to-string($bytes as xs:anyAtomicType, $encoding as xs:string) as xs:string
convert:binary-to-string($bytes as xs:anyAtomicType, $encoding as xs:string, $fallback as xs:boolean) as xs:string
|
Summary
|
Converts the specifed binary data (xs:base64Binary, xs:hexBinary) to a string:
- The UTF-8 default encoding can be overwritten with the optional
$encoding argument.
- By default, invalid characters will be rejected. If
$fallback is set to true, these characters will be replaced with the Unicode replacement character FFFD (�).
|
Errors
|
BXCO0001 : The input is an invalid XML string, or the wrong encoding has been specified. Invalid XML characters will be ignored if the CHECKSTRINGS option is turned off.
BXCO0002 : The specified encoding is invalid or not supported.
|
Examples
|
convert:binary-to-string(xs:hexBinary('48656c6c6f576f726c64')) yields HelloWorld .
|
convert:string-to-base64
Signatures
|
convert:string-to-base64($input as xs:string) as xs:base64Binary
convert:string-to-base64($input as xs:string, $encoding as xs:string) as xs:base64Binary
|
Summary
|
Converts the specified string to a xs:base64Binary item. If the default encoding is chosen, conversion will be cheap, as both xs:string and xs:base64Binary items are internally represented as byte arrays. The UTF-8 default encoding can be overwritten with the optional $encoding argument.
|
Errors
|
BXCO0001 : The input cannot be represented in the specified encoding.
BXCO0002 : The specified encoding is invalid or not supported.
|
Examples
|
string(convert:string-to-base64('HelloWorld')) yields SGVsbG9Xb3JsZA== .
|
convert:string-to-hex
Signatures
|
convert:string-to-hex($input as xs:string) as xs:hexBinary
convert:string-to-hex($input as xs:string, $encoding as xs:string) as xs:hexBinary
|
Summary
|
Converts the specified string to a xs:hexBinary item. If the default encoding is chosen, conversion will be cheap, as both xs:string and xs:hexBinary items are internally represented as byte arrays. The UTF-8 default encoding can be overwritten with the optional $encoding argument.
|
Errors
|
BXCO0001 : The input cannot be represented in the specified encoding.
BXCO0002 : The specified encoding is invalid or not supported.
|
Examples
|
string(convert:string-to-hex('HelloWorld')) yields 48656C6C6F576F726C64 .
|
Binary Data
convert:bytes-to-base64
Signatures
|
convert:bytes-to-base64($input as xs:byte*) as xs:base64Binary
|
Summary
|
Converts the specified byte sequence to a xs:base64Binary item. Conversion is cheap, as xs:base64Binary items are internally represented as byte arrays.
|
Errors
|
BXCO0001 : The input cannot be represented in the specified encoding.
BXCO0002 : The specified encoding is invalid or not supported.
|
Examples
|
string(convert:string-to-base64('HelloWorld')) yields SGVsbG9Xb3JsZA== .
|
convert:bytes-to-hex
Signatures
|
convert:bytes-to-hex($input as xs:byte*) as xs:hexBinary
|
Summary
|
Converts the specified byte sequence to a xs:hexBinary item. Conversion is cheap, as xs:hexBinary items are internally represented as byte arrays.
|
convert:binary-to-bytes
Signatures
|
convert:binary-to-bytes($bin as xs:anyAtomicType) as xs:byte*
|
Summary
|
Returns the specified binary data (xs:base64Binary, xs:hexBinary) as a sequence of bytes.
|
Examples
|
convert:binary-to-bytes(xs:base64Binary('QmFzZVggaXMgY29vbA==')) yields the sequence (66, 97, 115, 101, 88, 32, 105, 115, 32, 99, 111, 111, 108) .
convert:binary-to-bytes(xs:hexBinary("4261736558")) yields the sequence (66 97 115 101 88) .
|
Numbers
convert:integer-to-base
Signatures
|
convert:integer-to-base($num as xs:integer, $base as xs:integer) as xs:string
|
Summary
|
Converts $num to base $base , interpreting it as a 64-bit unsigned integer. The first $base elements of the sequence '0',..,'9','a',..,'z' are used as digits. Valid bases are 2, .., 36 .
|
Errors
|
BXCO0004 : The specified base is not in the range 2-36.
|
Examples
|
convert:integer-to-base(-1, 16) yields 'ffffffffffffffff' .
convert:integer-to-base(22, 5) yields '42' .
|
convert:integer-from-base
Signatures
|
convert:integer-from-base($str as xs:string, $base as xs:integer) as xs:integer
|
Summary
|
Decodes an xs:integer from $str , assuming that it's encoded in base $base . The first $base elements of the sequence '0',..,'9','a',..,'z' are allowed as digits, case doesn't matter. Valid bases are 2 - 36. If $str contains more than 64 bits of information, the result is truncated arbitarily.
|
Errors
|
BXCO0004 : The specified base is not in the range 2-36.
BXCO0005 : The specified digit is not valid for the given range.
|
Examples
|
convert:integer-from-base('ffffffffffffffff', 16) yields -1 .
convert:integer-from-base('CAFEBABE', 16) yields 3405691582 .
convert:integer-from-base('42', 5) yields 22 .
convert:integer-from-base(convert:integer-to-base(123, 7), 7) yields 123 .
|
Dates and Durations
convert:integer-to-dateTime
Signatures
|
convert:integer-to-dateTime($ms as xs:integer) as xs:dateTime
|
Summary
|
Converts the specified number of milliseconds since 1 Jan 1970 to an item of type xs:dateTime.
|
Examples
|
convert:integer-to-dateTime(0) yields 1970-01-01T00:00:00Z .
convert:integer-to-dateTime(1234567890123) yields 2009-02-13T23:31:30.123Z .
|
convert:dateTime-to-integer
Signatures
|
convert:dateTime-to-integer($dateTime as xs:dateTime) as xs:integer
|
Summary
|
Converts the specified item of type xs:dateTime to the number of milliseconds since 1 Jan 1970.
|
Examples
|
convert:dateTime-to-integer(xs:dateTime('1970-01-01T00:00:00Z')) yields 0 .
|
convert:integer-to-dayTime
Signatures
|
convert:integer-to-dayTime($ms as xs:integer) as xs:dayTimeDuration
|
Summary
|
Converts the specified number of milliseconds to an item of type xs:dayTimeDuration.
|
Examples
|
convert:integer-to-dayTime(1234) yields PT1.234S .
|
convert:dayTime-to-integer
Signatures
|
convert:dayTime-to-integer($dayTime as xs:dayTimeDuration) as xs:integer
|
Summary
|
Converts the specified item of type xs:dayTimeDuration to milliseconds represented by an integer.
|
Examples
|
convert:dayTime-to-integer(xs:dayTimeDuration('PT1S')) yields 1000 .
|
Errors
Code
|
Description
|
BXCO0001
|
The input is an invalid XML string, or the wrong encoding has been specified.
|
BXCO0002
|
The specified encoding is invalid or not supported.
|
BXCO0003
|
The specified base is not in the range 2-36.
|
BXCO0004
|
The specified encoding is invalid or not supported.
|
BXCO0005
|
The specified digit is not valid for the given range.
|
Changelog
- Version 8.5
- Version 7.5
The module was introduced with Version 7.3. Some of the functions have been adopted from the obsolete Utility Module.