Re: Livecode Builder - passing lcs string to C functions
Thanks so much for this Trevor, I can now retrieve requests from and respond to a virtual threaded http server which is nice. Now trying to work out how not to block the engine when the function that calls the server waits for a new request to come in i..e callback functions purely within lcb Dan On Mon, Dec 28, 2020 at 10:09 PM Trevor DeVore via use-livecode < use-livecode@lists.runrev.com> wrote: > On Mon, Dec 28, 2020 at 7:02 AM Dan Brown via use-livecode < > use-livecode@lists.runrev.com> wrote: > > > Hi I'm stuck trying to find examples of passing lcs strings to a C > function > > via pointer and it's driving me mad! I can retrieve char * pointers from > C > > functions, convert to string and pass back to lcs but haven't come across > > any easy to grok examples of sending data to C. Any guidance would be > > appreciated > > > I've used MCStringConvertToBytes to convert strings to a value you can pass > in as const char*. I have a hunspell example you can reference. > > Here is a link to the Hunspell_spell definition: > > > https://github.com/hunspell/hunspell/blob/8a2fdfe5a6bb1cbafc04b0c8486abcefd17ad903/src/hunspell/hunspell.h#L69 > > ``` > LIBHUNSPELL_DLL_EXPORTED int Hunspell_spell(Hunhandle* pHunspell, const > char*); > ``` > > Here is a link to the LCB code that passes a UTF8 string to Hunspell_spell: > > https://github.com/trevordevore/lc-hunspell/blob/master/hunspell.lcb#L150 > > Here is a link to the MCStringConvertToBytes definition in the LCB file: > > https://github.com/trevordevore/lc-hunspell/blob/master/hunspell.lcb#L19 > > -- > Trevor DeVore > ScreenSteps > www.screensteps.com > ___ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: Livecode Builder - passing lcs string to C functions
On Mon, Dec 28, 2020 at 7:02 AM Dan Brown via use-livecode < use-livecode@lists.runrev.com> wrote: > Hi I'm stuck trying to find examples of passing lcs strings to a C function > via pointer and it's driving me mad! I can retrieve char * pointers from C > functions, convert to string and pass back to lcs but haven't come across > any easy to grok examples of sending data to C. Any guidance would be > appreciated I've used MCStringConvertToBytes to convert strings to a value you can pass in as const char*. I have a hunspell example you can reference. Here is a link to the Hunspell_spell definition: https://github.com/hunspell/hunspell/blob/8a2fdfe5a6bb1cbafc04b0c8486abcefd17ad903/src/hunspell/hunspell.h#L69 ``` LIBHUNSPELL_DLL_EXPORTED int Hunspell_spell(Hunhandle* pHunspell, const char*); ``` Here is a link to the LCB code that passes a UTF8 string to Hunspell_spell: https://github.com/trevordevore/lc-hunspell/blob/master/hunspell.lcb#L150 Here is a link to the MCStringConvertToBytes definition in the LCB file: https://github.com/trevordevore/lc-hunspell/blob/master/hunspell.lcb#L19 -- Trevor DeVore ScreenSteps www.screensteps.com ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Re: Livecode Builder - passing lcs string to C functions
Basically you just use a shell command to execute the c code and pass arguments to the c program right after you call the code in the shell command. I wrote and example and posted it a few years ago but I do not have access to my old email files at the moment but you might still be able to find it by searching the list. I would be interested in seeing how you are doing it if you ever want to post the code for others to use. JB > On Dec 28, 2020, at 5:02 AM, Dan Brown via use-livecode > wrote: > > Hi I'm stuck trying to find examples of passing lcs strings to a C function > via pointer and it's driving me mad! I can retrieve char * pointers from C > functions, convert to string and pass back to lcs but haven't come across > any easy to grok examples of sending data to C. Any guidance would be > appreciated > > Thanks > > Dan > ___ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
Livecode Builder - passing lcs string to C functions
Hi I'm stuck trying to find examples of passing lcs strings to a C function via pointer and it's driving me mad! I can retrieve char * pointers from C functions, convert to string and pass back to lcs but haven't come across any easy to grok examples of sending data to C. Any guidance would be appreciated Thanks Dan ___ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
