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https://github.com/xomboverlord/ldc.git
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b15b3484c8
Initial commit after moving to Tango instead of Phobos. Lots of bugfixes... This build is not suitable for most things.
103 lines
3.4 KiB
D
103 lines
3.4 KiB
D
/*******************************************************************************
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Shows how the basic functionality of Logger operates.
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*******************************************************************************/
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private import tango.util.log.Log,
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tango.util.log.Configurator;
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/*******************************************************************************
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Search for a set of prime numbers
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*******************************************************************************/
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void compute (Logger log, uint max)
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{
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byte* feld;
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int teste=1,
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mom,
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hits=0,
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s=0,
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e = 1;
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int count;
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char tmp[128] = void;
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void set (byte* f, uint x)
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{
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*(f+(x)/16) |= 1 << (((x)%16)/2);
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}
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byte test (byte* f, uint x)
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{
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return cast(byte) (*(f+(x)/16) & (1 << (((x)%16)/2)));
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}
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// information level
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log.info (log.format (tmp, "Searching prime numbers up to {}", max));
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feld = (new byte[max / 16 + 1]).ptr;
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// get milliseconds since application began
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auto begin = log.runtime;
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while ((teste += 2) < max)
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if (! test (feld, teste))
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{
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if ((++hits & 0x0f) == 0)
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// more information level
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log.info (log.format (tmp, "found {}", hits));
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for (mom=3*teste; mom < max; mom += teste<<1)
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set (feld, mom);
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}
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// get number of milliseconds we took to compute
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auto period = log.runtime - begin;
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if (hits)
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// more information
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log.info (log.format (tmp, "{} prime numbers found in {} millsecs", hits, period));
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else
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// a warning level
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log.warn ("no prime numbers found");
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// check to see if we're enabled for
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// tracing before we expend a lot of effort
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if (log.isEnabled (log.Level.Trace))
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{
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e = max;
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count = 0 - 2;
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if (s % 2 is 0)
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count++;
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while ((count+=2) < e)
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// log trace information
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if (! test (feld, count))
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log.trace (log.format (tmp, "prime found: {}", count));
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}
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}
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/*******************************************************************************
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Compute a bunch of prime numbers
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*******************************************************************************/
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void main()
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{
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// get a logger to represent this module. We could just as
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// easily share a name with some other module(s)
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auto log = Log.getLogger ("example.logging");
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try {
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compute (log, 1000);
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} catch (Exception x)
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{
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// log the exception as an error
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log.error ("Exception: " ~ x.toString);
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}
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}
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