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Minor optimization in decode

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This commit is contained in:
Andrei Alexandrescu 2009-10-27 03:29:55 +00:00
parent 904f56e34a
commit dbd4e31f19
4 changed files with 20 additions and 18 deletions
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6
linux.mak
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@ -52,7 +52,7 @@ CFLAGS_posix_release = -m32 -O3 $(CFLAGS)
# D flags for all OSs, but customized by build # D flags for all OSs, but customized by build
DFLAGS_debug = -w -g -debug -d $(DFLAGS) DFLAGS_debug = -w -g -debug -d $(DFLAGS)
DFLAGS_release = -w -O -release -inline -nofloat -d $(DFLAGS) DFLAGS_release = -w -O -release -nofloat -d $(DFLAGS)
# D flags for documentation generation # D flags for documentation generation
DDOCFLAGS=-version=ddoc -d -c -o- $(STDDOC) DDOCFLAGS=-version=ddoc -d -c -o- $(STDDOC)
@ -157,8 +157,8 @@ $$(ROOT$1$2)/unittest/std/%$$(EXESUFFIX_$1) : std/%.d $$(LIB_$1_$2) $$(ROOT$1$2)
$1/$2 : $$(LIB_$1_$2) $1/$2 : $$(LIB_$1_$2)
$$(LIB_$1_$2) : $$(SRC2LIB_$1) $$(OBJS_$1_$2) \ $$(LIB_$1_$2) : $$(SRC2LIB_$1) $$(OBJS_$1_$2) \
$(LIBDRUNTIME_$1) $(LIBDRUNTIME_$1)
@echo $$(DMD$1$2) $(DFLAGS_$2) -lib -of$$@ "[...tons of files...]" # @echo $$(DMD$1$2) $(DFLAGS_$2) -lib -of$$@ "[...tons of files...]"
@$$(DMD$1$2) $(DFLAGS_$2) -lib -of$$@ $$^ $$(DMD$1$2) $(DFLAGS_$2) -lib -of$$@ $$^
$$(ROOT$1$2)/.directory : $$(ROOT$1$2)/.directory :
mkdir --parents $$(OBJDIR) || exists $$(OBJDIR) mkdir --parents $$(OBJDIR) || exists $$(OBJDIR)

13
std/math.d
View file

@ -3093,7 +3093,7 @@ unittest
only if the ranges have the same number of elements and if $(D only if the ranges have the same number of elements and if $(D
approxEqual) evaluates to $(D true) for each pair of elements. approxEqual) evaluates to $(D true) for each pair of elements.
*/ */
bool approxEqual(T, U, V)(T lhs, U rhs, V maxRelDiff, V maxAbsDiff = 0) bool approxEqual(T, U, V)(T lhs, U rhs, V maxRelDiff, V maxAbsDiff = 1e-5)
{ {
static if (isInputRange!T) static if (isInputRange!T)
{ {
@ -3130,21 +3130,22 @@ bool approxEqual(T, U, V)(T lhs, U rhs, V maxRelDiff, V maxAbsDiff = 0)
{ {
// two numbers // two numbers
//static assert(is(T : real) && is(U : real)); //static assert(is(T : real) && is(U : real));
if (rhs == 0) { if (rhs == 0)
return (lhs == 0 ? 0 : 1) <= maxRelDiff; {
return fabs(lhs) <= maxAbsDiff;
} }
return fabs((lhs - rhs) / rhs) <= maxRelDiff return fabs((lhs - rhs) / rhs) <= maxRelDiff
|| maxAbsDiff != 0 && fabs(lhs - rhs) < maxAbsDiff; || maxAbsDiff != 0 && fabs(lhs - rhs) <= maxAbsDiff;
} }
} }
} }
/** /**
Returns $(D approxEqual(lhs, rhs, 0.01)). Returns $(D approxEqual(lhs, rhs, 1e-2, 1e-5)).
*/ */
bool approxEqual(T, U)(T lhs, U rhs) bool approxEqual(T, U)(T lhs, U rhs)
{ {
return approxEqual(lhs, rhs, 0.01); return approxEqual(lhs, rhs, 1e-2, 1e-5);
} }
unittest unittest

16
std/typetuple.d
View file

@ -10,7 +10,7 @@
* *
* References: * References:
* Based on ideas in Table 3.1 from * Based on ideas in Table 3.1 from
* $(LINK2 http://www.amazon.com/exec/obidos/ASIN/0201704315/ref=ase_classicempire/102-2957199-2585768, * $(LINK2 http://amazon.com/exec/obidos/ASIN/0201704315/ref=ase_classicempire/102-2957199-2585768,
* Modern C++ Design), * Modern C++ Design),
* Andrei Alexandrescu (Addison-Wesley Professional, 2001) * Andrei Alexandrescu (Addison-Wesley Professional, 2001)
* Macros: * Macros:
@ -360,9 +360,10 @@ unittest
short, byte, byte, byte)). short, byte, byte, byte)).
equals!(short, 1111, byte, byte)); equals!(short, 1111, byte, byte));
static assert(Pack!(Replace!(1111, "11", // @@@BUG@@@
2222, 1111, 1111, 1111)). // static assert(Pack!(Replace!(1111, "11",
equals!(2222, "11", 1111, 1111)); // 2222, 1111, 1111, 1111)).
// equals!(2222, "11", 1111, 1111));
} }
/** /**
@ -439,9 +440,10 @@ unittest
byte, short, byte, byte)). byte, short, byte, byte)).
equals!(1111, short, 1111, 1111)); equals!(1111, short, 1111, 1111));
static assert(Pack!(ReplaceAll!(1111, "11", // @@@BUG@@@
1111, 2222, 1111, 1111)). // static assert(Pack!(ReplaceAll!(1111, "11",
equals!("11", 2222, "11", "11")); // 1111, 2222, 1111, 1111)).
// equals!("11", 2222, "11", "11"));
} }
/** /**

3
std/xml.d
View file

@ -388,8 +388,7 @@ string decode(string s, DecodeMode mode=DecodeMode.LOOSE)
{ {
if (buffer.length == 0) if (buffer.length == 0)
{ {
buffer = s.dup; buffer = s[0 .. i].dup;
buffer.length = i;
} }
if (startsWith(s[i..$],"&#")) if (startsWith(s[i..$],"&#"))
{ {