I use jpos to parse iso8583 message and when I see ISOException I get two numbers, the first one specifies the error field, the second one does not specify the next field nor the used bytes, for example:
"...Field length 81 too long. Max: 11) unpacking field=32, consumed=55"
can any body help?
Related
RFC 1952 (GZIP File Format Specification) section 2.3.1.1 reads:
2.3.1.1. Extra field
If the FLG.FEXTRA bit is set, an "extra field" is present in
the header, with total length XLEN bytes. It consists of a
series of subfields, each of the form:
+---+---+---+---+==================================+
|SI1|SI2| LEN |... LEN bytes of subfield data ...|
+---+---+---+---+==================================+
SI1 and SI2 provide a subfield ID, typically two ASCII letters
with some mnemonic value. Jean-Loup Gailly
<email#hidden> is maintaining a registry of subfield
IDs; please send him any subfield ID you wish to use. Subfield
IDs with SI2 = 0 are reserved for future use. The following
IDs are currently defined:
SI1 SI2 Data
---------- ---------- ----
0x41 ('A') 0x70 ('P') Apollo file type information
LEN gives the length of the subfield data, excluding the 4
initial bytes.
Do any subfield types exist beyond the AP given in the RFC? A web search doesn't find a list; neither is there any mention on GZip's Wikipedia page, the GNU homepage, in the gzip source code, or on Stack Overflow.
As far as I know, there is no such registry being maintained. Jean-loup no longer works on gzip.
Here is one more subfield in use:
The BGZF format (which is gzip-conformant) developed for use in bioinformatics, uses the subfield type "BC", to indicate the size of the current block. This is used to make parallel decompression easy.
From the specification at http://samtools.github.io/hts-specs/SAMv1.pdf :
Each BGZF block contains a standard gzip file header with the following standard-compliant extensions:
The F.EXTRA bit in the header is set to indicate that extra fields are present.
The extra field used by BGZF uses the two subfield ID values 66 and 67 (ASCII ‘BC’).
The length of the BGZF extra field payload (field LEN in the gzip specification) is 2 (two bytes of
payload).
The payload of the BGZF extra field is a 16-bit unsigned integer in little endian format. This integer
gives the size of the containing BGZF block minus one.
I have some data in Hive 1.2.1 table. I have to get raw bytes of a specific column. The column data is html raw in multiple languages. In order to get length of characters, I can use simple query like below
select baseurl, LENGTH(content) from clss limit 30;
Above query is ok for characters length the problem is for text other is English, their value is incorrect. For a Character in Arabic, it is saved as unicoded that's why character length is changed. Some characters are of two bytes and some are single byte.
Is there any builtin function to know bytes of text instead of characters ?
Function character_length(string str) was added in Jira HIVE-15979 And it says Fix versions 2.3.0. If you cannot upgrade your Hive (and this is quite risky), then try to download UDF source codes and build it, then add jar and create temporary function.
Download code: GenericUDFCharacterLength.java
I know how to return a Unicode character from a code point. That's not what I'm after. What I want to know is how to return the name associated with a particular code point. For example, The code point for 🍀 is 1F340. And its name is FOUR LEAF CLOVER. Is it possible for us to return this name with its code point? I've read about 100 topics involving Unicode. But I haven't see one discussing my question. I hope that's possible.
Thank you for your help.
Have you considered the ICU library? It offers the following C API: http://icu-project.org/apiref/icu4c/uchar_8h.html#aa488f2a373998c7decb0ecd3e3552079
int32_t u_charName(
UChar32 code,
UCharNameChoice nameChoice,
char* buffer,
int32_t bufferLength,
UErrorCode* pErrorCode)
Retrieve the name of a Unicode character.
Depending on nameChoice, the character name written into the buffer is the "modern" name or the name that was defined in Unicode version 1.0. The name contains only "invariant" characters like A-Z, 0-9, space, and '-'. Unicode 1.0 names are only retrieved if they are different from the modern names and if the data file contains the data for them. gennames may or may not be called with a command line option to include 1.0 names in unames.dat.
Parameters
code The character (code point) for which to get the name. It must be 0<=code<=0x10ffff.
nameChoice Selector for which name to get.
buffer Destination address for copying the name. The name will always be zero-terminated. If there is no name, then the buffer will be set to the empty string.
bufferLength ==sizeof(buffer)
pErrorCode Pointer to a UErrorCode variable; check for U_SUCCESS() after u_charName() returns.
Returns
The length of the name, or 0 if there is no name for this character. If the bufferLength is less than or equal to the length, then the buffer contains the truncated name and the returned length indicates the full length of the name. The length does not include the zero-termination.
ICU is the right approach, but it's even simpler than Chris said. Foundation includes ICU already, for various text processing functions, including CFStringTransform(). Its transform parameter accepts "any valid ICU transform ID defined in the ICU User Guide for Transforms".
One of ICU's transforms is Any-Name:
Converts between characters and their Unicode names in curly braces. For example:
., ⇆ {FULL STOP}{COMMA}
(The syntax isn't exactly as documented, but it's close enough you can figure it out.)
There's also an Any-Hex transform which can be used for translating to/from the codepoint hex value.
Encoding with hexadecimal numbers seems to be different from using hexadecimals to represent numbers. For example, then hex number 0x40 to me should be equal to 64, or BA_{64}, but when I put it through this hex to base64 converter, I get the output: QA== which to me is equal to some number times 64. Why is this?
Also when I check the integer value of the hex string deadbeef I get 3735928559, but when I check it other places I get: 222 173 190 239. Why is this?
Addendum: So I guess it is because it is easier to break the number into bit chunks than treat it as a whole number when encoding? That is pretty confusing to me but I guess I get it.
You may wish to read this:
http://en.wikipedia.org/wiki/Base64
In summary, base64 specifies a specific encoding, which involves using different values for letters than their ASCII encoding.
For the second part, one source is treating the entire string as a 32 bit integer, and the other is dividing it into bytes and giving the value of each byte.
I'm trying to process a fixed width input file in pentaho and validate the format. The file will be a mixture of strings, numbers and dates. However when attempting to process a number field that has an incorrect character present (which i had expected would throw an error) it just reads the first part of the number and ignores the bad char.
I can recreate this issue with a very simple input file containing a single field:
I specify the expected number format, along with start position and length:
On running the transformation i would have expected the 'Q' to cause an error instead the following result is displayed, just reading the first two digits "67" and padding the rest to match the specified format:
If the input file is formatted correctly it runs perfectly well, but need it to throw an error otherwise. Any suggestions would be awesome. Thanks!
Just an FYI in case someone stumbles accross this question after hitting the same issues as myself.
I was able to construct a workaround by reading all values in the "Text File Input" step as strings, and then using a "Data Validator" step equipped with regex evaluation to ensure numbers were correctly formatted before parsing to number type with a following "Select Values" step.
Takes a bit longer to do this for every field, but was the most robust solution i could come up with.
Thanks