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%*0 |
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(17:11 6/6/2002)
Phlamethrower (17:19 6/6/2002)
ninj (17:47 6/6/2002)
Phlamethrower (17:54 6/6/2002)
bmsh (14:58 15/6/2002)
Hertzsprung (12:43 7/6/2002)
Phlamethrower (14:07 7/6/2002)
Matthew (14:40 7/6/2002)
bmsh (15:19 7/6/2002)
Matthew (07:54 8/6/2002)
Matthew (14:58 15/6/2002)
Phlamethrower (14:58 15/6/2002)
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bmsh |
Message #5131, posted at 17:11, 6/6/2002 |
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Could anyone point me in the direction of a reference to the %*0-style references that you find in !Run files and the like? I've seen a few different variations but can't work out what each character means or whatever. I've got the PRMs on CD but can't work out what to look up in the index... |
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Phlamethrower |
Message #5132, posted at 17:19, 6/6/2002, in reply to message #5131 |
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The syntax is something like: %[*]<num> Where <num> is the parameter number, starting at 0, and * is a flag to include all parameters from there on. E.g.: !Test contains 'echo %1 monkeys went to %*2' would do: !Test foo 1234 one two three
1234 monkeys went to one two three Is that OK? |
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ninj |
Message #5133, posted at 17:47, 6/6/2002, in reply to message #5132 |
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The variations in the syntax are probably those where you need to be able to pass it through GStrans and not hardcode the value of the variable at that time. In simple terms it means that if you called
Set Alias$RunType_FFF dump %0
it would determine what %0 was at that time and subsitute it. It it would end up always dumping out the same file when you clicked on a text file. So instead they use a form that turns into %0 when evaluated. That's done by doubling up the % - so %%*0 turns into %*0, %%1 turns into %1. [Is that right? I don't have an obey file to hand] I think I read it documented in the Archimedes User Guide. That (or a recent incarnation of it) should be in the Manuals directory on your hard disc, I think. In the PRMs it's probably a feature of OS_CLI, and the %% business is a feature of GStrans. |
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Phlamethrower |
Message #5134, posted at 17:54, 6/6/2002, in reply to message #5133 |
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That's a good point - % acts as the 'escape character', like / in C. So %%0 would be converted to %0, and %0 would be converted to the value of parameter 0 |
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Hertzsprung |
Message #5136, posted at 12:43, 7/6/2002, in reply to message #5135 |
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You'll be needing SYS "OS_GetEnv" I believe. If you've got the PRMs it'll be in there... |
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Phlamethrower |
Message #5137, posted at 14:07, 7/6/2002, in reply to message #5136 |
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Or a StrongHelp manual. Be warned though - I think you may need to manually read the string character by character into a BASIC string - I'll give an example if you need one. |
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Matthew |
Message #5138, posted at 14:40, 7/6/2002, in reply to message #5137 |
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Or a StrongHelp manual. Be warned though - I think you may need to manually read the string character by character into a BASIC string - I'll give an example if you need one. You can do SYS"OS_GetEnv" TO A$ to read it into a string. Then do some mucking about with INSTR and LEFT$,RIGHT$ etc., or try and use OS_ReadArgs. Not the most intuitive way of passing variables to a program... |
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bmsh |
Message #5140, posted at 15:19, 7/6/2002, in reply to message #5138 |
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Thankyou to to everyone for their help -- I'm very grateful. Matthew, when you say that it's not the most intuitive way of passing variables do you mean there's a better way, or just that the available methods aren't very intuitive? |
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Matthew |
Message #5142, posted at 07:54, 8/6/2002, in reply to message #5140 |
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Matthew, when you say that it's not the most intuitive way of passing variables do you mean there's a better way, or just that the available methods aren't very intuitive? I don't know of a better way if you're using BASIC, no. Anyone? |
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bmsh |
Message #5135, posted at 14:58, 15/6/2002, in reply to message #5134 |
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Thanks, guys, that's explained it for me. Now on to the next problem: is there a way to read these parameters from a BASIC program? What I mean is, if I have done *Set Alias$RunType_XXX <App$Dir>.!RunImage %%0 (or something) where !RunImage is a BASIC program, is there a way to read the name of the file double-clicked on from my program? I'll try looking this up at home tonight but I'm not entirely confident of being able to find the answer myself...  |
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Matthew |
Message #5139, posted at 14:58, 15/6/2002, in reply to message #5136 |
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You'll be needing SYS "OS_GetEnv" I believe. If you've got the PRMs it'll be in there... Does no-one realise that the StrongHelp manuals are all online, courtesy of AcornSearch?  The entry for OS_GetEnv. |
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Phlamethrower |
Message #5141, posted at 14:58, 15/6/2002, in reply to message #5139 |
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Does no-one realise that the StrongHelp manuals are all online, courtesy of AcornSearch? No. Or at least I didn't  |
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