Mail Archives: djgpp/1997/06/21/11:49:00
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Are there any screen builders for Allegro or for JPTUI?
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<html><head></head><BODY bgcolor=3D"#C8E0D8"><p><font size=3D2 =
color=3D"#000000" face=3D"Arial">Are there any screen builders for =
Allegro or for JPTUI?</p>
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{
> fin >> tmpBuffer;
I'm not sure, does this really read the next 128 bytes from the input
stream (including a terminating '0' character)??
>
> // allocate memory to hold word
> wordBuffer[n] = new char [(strlen(tmpBuffer))];
I think you'll need to allocate at least strlen(tmpBuffer) + 1 bytes
here to hold the terminating '0' character of the string.
>
> // copy string to newly allocated space
> strcpy(wordBuffer[n], tmpBuffer);
>
> n++;
> } while(!fin.eof());
>
> fin.close();
> }
>
> What am I missing? The DJGPP accepts this and various other attempts
> such as stuffing a pointer in front of the pointer array, the only
> thing I can get it to do is GPF or store only the first character
Excuse my ignorance, but what do you mean with 'GPF'?
> in the buffer.
>
I think your function above does the following inside the loop:
- read 1 character from the input stream to tmpBuffer
- since you're lucky, tmpBuffer is initialized with '0' characters
- then you allocate strlen(tmpBuffer) = 1 bytes memory for your
ptr (internally the minimum mem allocation segment will be assigned,
a power of 2 number of bytes, I'm not sure what's the smallest but
I think at least 2^8 = 256 bytes)
- it will be assigned correctly to the next index slot in the array
- the strcpy will transfer the 1 byte from tmpBuffer to the ptr
- you're still lucky, because the tmpBuffer terminates with a '0'
character and the wordBuffer[n] keeps more than 1 byte
HTH
Günther
--
~~o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
O o __/|_ "I'm swimming, | Guenther Makulik
O /* \/| I'm swimming ..." | E-Mail: makulik AT evolution DOT org
\_U___/\| (Sonic Youth) |
http://members.evolution.org/gmakulik/
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