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Technically correct but practically useless

Scheduled Pinned Locked Moved The Lounge
csharpc++iotquestion
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  • Richard DeemingR Richard Deeming

    Does the OS you're using not have ICU[^] support built-in?

    "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

    CPalliniC Offline
    CPalliniC Offline
    CPallini
    wrote on last edited by
    #8

    Many IoT devices, don't have an OS.

    "In testa che avete, Signor di Ceprano?" -- Rigoletto

    In testa che avete, signor di Ceprano?

    1 Reply Last reply
    0
    • honey the codewitchH honey the codewitch

      So I'm wrapping this

      The quick brown fox jumped over the lazy dog

      And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

      The quick
      brown
      fox jumped
      over the
      lazy dog

      Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

      To err is human. Fortune favors the monsters.

      B Offline
      B Offline
      BorkenkaeferFrisstFichten
      wrote on last edited by
      #9

      The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

      honey the codewitchH 1 Reply Last reply
      0
      • Richard DeemingR Richard Deeming

        Does the OS you're using not have ICU[^] support built-in?

        "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

        honey the codewitchH Offline
        honey the codewitchH Offline
        honey the codewitch
        wrote on last edited by
        #10

        What OS? FreeRTOS? No. And it wouldn't know what to do with truetype anyway. It has no concept of graphics

        To err is human. Fortune favors the monsters.

        1 Reply Last reply
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        • B BorkenkaeferFrisstFichten

          The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

          honey the codewitchH Offline
          honey the codewitchH Offline
          honey the codewitch
          wrote on last edited by
          #11

          Mine was accurate, just truncated at the s :laugh:

          To err is human. Fortune favors the monsters.

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          0
          • Sander RosselS Sander Rossel

            I have a simple(r) solution. Print the character to an image (in-memory, obviously). Now connect to some OCR service and let it scan the image. If the result is null, "", " " or " " it's whitespace. Just thinking outside the box :D

            Best, Sander Azure DevOps Succinctly (free eBook) Azure Serverless Succinctly (free eBook) Migrating Apps to the Cloud with Azure arrgh.js - Bringing LINQ to JavaScript

            honey the codewitchH Offline
            honey the codewitchH Offline
            honey the codewitch
            wrote on last edited by
            #12

            *angeryface* :mad:

            To err is human. Fortune favors the monsters.

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            • L Lost User

              Hmmm, Can you go into technical details about the difficulties? I can't figure out why you need 'a massive table'.

              honey the codewitchH Offline
              honey the codewitchH Offline
              honey the codewitch
              wrote on last edited by
              #13

              The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

              To err is human. Fortune favors the monsters.

              L 1 Reply Last reply
              0
              • honey the codewitchH honey the codewitch

                The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

                To err is human. Fortune favors the monsters.

                L Offline
                L Offline
                Lost User
                wrote on last edited by
                #14

                honey the codewitch wrote:

                Still, it's larger than I'd like.

                I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

                honey the codewitchH 1 Reply Last reply
                0
                • honey the codewitchH honey the codewitch

                  So I'm wrapping this

                  The quick brown fox jumped over the lazy dog

                  And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                  The quick
                  brown
                  fox jumped
                  over the
                  lazy dog

                  Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                  To err is human. Fortune favors the monsters.

                  T Offline
                  T Offline
                  TheRealSteveJudge
                  wrote on last edited by
                  #15

                  No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                  M 1 Reply Last reply
                  0
                  • L Lost User

                    honey the codewitch wrote:

                    Still, it's larger than I'd like.

                    I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

                    honey the codewitchH Offline
                    honey the codewitchH Offline
                    honey the codewitch
                    wrote on last edited by
                    #16

                    Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                    To err is human. Fortune favors the monsters.

                    L 1 Reply Last reply
                    0
                    • honey the codewitchH honey the codewitch

                      Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                      To err is human. Fortune favors the monsters.

                      L Offline
                      L Offline
                      Lost User
                      wrote on last edited by
                      #17

                      honey the codewitch wrote:

                      Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                      Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                      honey the codewitchH 1 Reply Last reply
                      0
                      • L Lost User

                        honey the codewitch wrote:

                        Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                        Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                        honey the codewitchH Offline
                        honey the codewitchH Offline
                        honey the codewitch
                        wrote on last edited by
                        #18

                        Ohhhh thanks. Sorry, it was early and I was still a bit slow. I'll do that.

                        To err is human. Fortune favors the monsters.

                        1 Reply Last reply
                        0
                        • honey the codewitchH honey the codewitch

                          So I'm wrapping this

                          The quick brown fox jumped over the lazy dog

                          And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                          The quick
                          brown
                          fox jumped
                          over the
                          lazy dog

                          Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                          To err is human. Fortune favors the monsters.

                          P Offline
                          P Offline
                          PIEBALDconsult
                          wrote on last edited by
                          #19

                          For part of my UTF-8 decoder I use a sparse array, but of course I'm using C# so I can catch Index Exceptions. I guess I now have to add more characters to it though.

                          1 Reply Last reply
                          0
                          • T TheRealSteveJudge

                            No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                            M Offline
                            M Offline
                            megaadam
                            wrote on last edited by
                            #20

                            TheRealSteveJudge wrote:

                            jumps

                            I think you must've solved it!

                            "If we don't change direction, we'll end up where we're going"

                            T 1 Reply Last reply
                            0
                            • M megaadam

                              TheRealSteveJudge wrote:

                              jumps

                              I think you must've solved it!

                              "If we don't change direction, we'll end up where we're going"

                              T Offline
                              T Offline
                              TheRealSteveJudge
                              wrote on last edited by
                              #21

                              :laugh:

                              1 Reply Last reply
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