This SmallEiffel example shows how to use external C calls in SmallEiffel!
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Compile it this way with SmallEiffel:
> compile testformat make -o testformat format.c
or use the supplied Makefile.
You will get some warning messages during the C compilation:
---- warnings -------
testformat1.c: In function `rT28d2s':
testformat1.c:1771: warning: assignment makes pointer from integer without a cast
testformat1.c: In function `rT28i2s':
testformat1.c:1886: warning: assignment makes pointer from integer without a cast
testformat1.c: In function `rT28r2s':
testformat1.c:1926: warning: assignment makes pointer from integer without a cast
testformat1.c: In function `rT28s2s':
testformat1.c:1951: warning: assignment makes pointer from integer without a cast
---------------------
These can be ignored!
- Needed files
testformat.e - this is the main test file
format.e - offers a new FORMAT class with C printf like formattings
format.c - external C supplementary file for format.e
string.e - an extended STRING class needed by format.e
Makefile - just type 'make' to build the example
NOTE: SmallEiffel v0.95 (remember releases count backwards, so v0.95 is
newer than v0.97) has now also features "from_external" and some
advanced external pointer access routines. So the FORMAT class
can be written absolutely different, than shown in this approach.
However, this example has been written under v0.97 and there
wheren't any of the newer advanced features available. So this
was for me the only way to show to pass C strings back to Eiffel.
Valentino Kyriakides
1kyriaki@informatik.uni-hamburg.de
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.