src/xmlpatterns/data/qatomicmathematicians.cpp

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  41
  42 #include <math.h>
  43
  44 #include <qnumeric.h>
  45
  46 #include "qabstractdatetime_p.h"
  47 #include "qabstractduration_p.h"
  48 #include "qabstractfloat_p.h"
  49 #include "qdaytimeduration_p.h"
  50 #include "qdecimal_p.h"
  51 #include "qinteger_p.h"
  52 #include "qpatternistlocale_p.h"
  53
  54 #include "qatomicmathematicians_p.h"
  55
  56 QT_BEGIN_NAMESPACE
  57
  58 using namespace QPatternist;
  59
  60 /* The translation strings is place here once, in order to reduce work for translators,
  61  * and provide consistency. */
  62
  63 static inline QString idivZeroInvalid()
  64 {
  65     return QtXmlPatterns::tr("Integer division (%1) by zero (%2) is undefined.")
  66              .arg(formatKeyword("idiv"))
  67              .arg(formatData("0"));
  68 }
  69
  70 static inline QString divZeroInvalid()
  71 {
  72     return QtXmlPatterns::tr("Division (%1) by zero (%2) is undefined.")
  73              .arg(formatKeyword("div"))
  74              .arg(formatData("0"));
  75 }
  76
  77 static inline QString modZeroInvalid()
  78 {
  79     return QtXmlPatterns::tr("Modulus division (%1) by zero (%2) is undefined.")
  80              .arg(formatKeyword("mod"))
  81              .arg(formatData("0"));
  82 }
  83
  84 Item DecimalMathematician::calculate(const Item &o1,
  85                                      const Operator op,
  86                                      const Item &o2,
  87                                      const QExplicitlySharedDataPointer<DynamicContext> &context) const
  88 {
  89     switch(op)
  90     {
  91         case Div:
  92         {
  93             if(o2.as<Numeric>()->toInteger() == 0)
  94             {
  95                 context->error(divZeroInvalid(), ReportContext::FOAR0001, this);
  96                 return Item(); /* Silences source code analyzer warning. */
  97             }
  98             else
  99                 return toItem(Decimal::fromValue(o1.as<Numeric>()->toDecimal() / o2.as<Numeric>()->toDecimal()));
 100         }
 101         case IDiv:
 102         {
 103             if(o2.as<Numeric>()->toInteger() == 0)
 104             {
 105                 context->error(idivZeroInvalid(), ReportContext::FOAR0001, this);
 106                 return Item(); /* Silences source code analyzer warning. */
 107             }
 108             else
 109                 return Integer::fromValue(static_cast<xsInteger>(o1.as<Numeric>()->toDecimal() /
 110                                                                  o2.as<Numeric>()->toDecimal()));
 111         }
 112         case Substract:
 113             return toItem(Decimal::fromValue(o1.as<Numeric>()->toDecimal() - o2.as<Numeric>()->toDecimal()));
 114         case Mod:
 115         {
 116             if(o2.as<Numeric>()->toInteger() == 0)
 117             {
 118                 context->error(modZeroInvalid(), ReportContext::FOAR0001, this);
 119                 return Item(); /* Silences source code analyzer warning. */
 120             }
 121             else
 122                 return toItem(Decimal::fromValue(::fmod(o1.as<Numeric>()->toDecimal(), o2.as<Numeric>()->toDecimal())));
 123         }
 124         case Multiply:
 125             return toItem(Decimal::fromValue(o1.as<Numeric>()->toDecimal() * o2.as<Numeric>()->toDecimal()));
 126         case Add:
 127             return toItem(Decimal::fromValue(o1.as<Numeric>()->toDecimal() + o2.as<Numeric>()->toDecimal()));
 128     }
 129
 130     Q_ASSERT(false);
 131     return Item(); /* GCC unbarfer. */
 132 }
 133
 134 Item IntegerMathematician::calculate(const Item &o1,
 135                                      const Operator op,
 136                                      const Item &o2,
 137                                      const QExplicitlySharedDataPointer<DynamicContext> &context) const
 138 {
 139     switch(op)
 140     {
 141         case Div:
 142             if(o2.as<Numeric>()->toInteger() == 0)
 143             {
 144                 context->error(divZeroInvalid(), ReportContext::FOAR0001, this);
 145                 return Item(); /* Silences source code analyzer warning. */
 146             }
 147             else /* C++ automatically performs truncation of long integer(xsInteger). */
 148                 return toItem(Decimal::fromValue(o1.as<Numeric>()->toDecimal() / o2.as<Numeric>()->toDecimal()));
 149         case IDiv:
 150         {
 151             if(o2.as<Numeric>()->toInteger() == 0)
 152             {
 153                 context->error(idivZeroInvalid(), ReportContext::FOAR0001, this);
 154                 return Item(); /* Silences source code analyzer warning. */
 155             }
 156             else /* C++ automatically performs truncation of long integer(xsInteger). */
 157                 return Integer::fromValue(o1.as<Numeric>()->toInteger() / o2.as<Numeric>()->toInteger());
 158         }
 159         case Substract:
 160             return Integer::fromValue(o1.as<Numeric>()->toInteger() - o2.as<Numeric>()->toInteger());
 161         case Mod:
 162         {
 163             const xsInteger divisor = o2.as<Numeric>()->toInteger();
 164
 165             if(divisor == 0)
 166             {
 167                 context->error(modZeroInvalid(), ReportContext::FOAR0001, this);
 168                 return Item(); /* Silences source code analyzer warning. */
 169             }
 170             else
 171                 return Integer::fromValue(o1.as<Numeric>()->toInteger() % divisor);
 172         }
 173         case Multiply:
 174             return Integer::fromValue(o1.as<Numeric>()->toInteger() * o2.as<Numeric>()->toInteger());
 175         case Add:
 176             return Integer::fromValue(o1.as<Numeric>()->toInteger() + o2.as<Numeric>()->toInteger());
 177     }
 178
 179     Q_ASSERT(false);
 180     return Item(); /* GCC unbarfer. */
 181 }
 182
 183 Item DurationNumericMathematician::calculate(const Item &o1,
 184                                              const Operator op,
 185                                              const Item &o2,
 186                                              const QExplicitlySharedDataPointer<DynamicContext> &context) const
 187 {
 188     Q_ASSERT(op == Div || op == Multiply);
 189
 190     const AbstractDuration::Ptr duration(o1.as<AbstractDuration>());
 191     const xsDouble dbl = o2.as<Numeric>()->toDouble();
 192
 193     switch(op)
 194     {
 195         case Div:
 196         {
 197             if(qIsInf(dbl))
 198                 return duration->fromValue(0);
 199             else if(qIsNaN(dbl))
 200             {
 201                 context->error(QtXmlPatterns::tr(
 202                            "Dividing a value of type %1 by %2 (not-a-number) "
 203                            "is not allowed.")
 204                                .arg(formatType(context->namePool(),
 205                                                duration->type()))
 206                                .arg(formatData("NaN")),
 207                                ReportContext::FOCA0005,
 208                                this);
 209                 return Item();
 210             }
 211             else if(Double::isEqual(dbl, 0))
 212             {
 213                 context->error(QtXmlPatterns::tr(
 214                            "Dividing a value of type %1 by %2 or %3 (plus or "
 215                            "minus zero) is not allowed.")
 216                                .arg(formatType(context->namePool(),
 217                                                duration->type()))
 218                                .arg(formatData("-0"))
 219                                .arg(formatData("0")),
 220                                ReportContext::FODT0002,
 221                                this);
 222                 return Item();
 223             }
 224
 225             return duration->fromValue(static_cast<AbstractDuration::Value>(duration->value() / dbl));
 226         }
 227         case Multiply:
 228         {
 229             if(Double::isEqual(dbl, 0))
 230                 return duration->fromValue(0);
 231             else if(qIsNaN(dbl))
 232             {
 233                 context->error(QtXmlPatterns::tr(
 234                            "Dividing a value of type %1 by %2 (not-a-number) "
 235                            "is not allowed.")
 236                                .arg(formatType(context->namePool(),
 237                                                duration->type()))
 238                                .arg(formatData("NaN")),
 239                                ReportContext::FOCA0005,
 240                                this);
 241                 return Item();
 242             }
 243             else if(qIsInf(dbl))
 244             {
 245                 context->error(QtXmlPatterns::tr(
 246                            "Multiplication of a value of type %1 by %2 or %3 "
 247                            "(plus or minus infinity) is not allowed.")
 248                                .arg(formatType(context->namePool(),
 249                                                duration->type()))
 250                                .arg(formatData("-INF"))
 251                                .arg(formatData("INF")),
 252                                ReportContext::FODT0002,
 253                                this);
 254                 return Item();
 255             }
 256
 257             return duration->fromValue(static_cast<AbstractDuration::Value>(duration->value() * dbl));
 258         }
 259         default:
 260         {
 261             Q_ASSERT(false);
 262             return Item(); /* Silence warning. */
 263         }
 264     }
 265 }
 266
 267 Item DurationDurationMathematician::calculate(const Item &o1,
 268                                               const Operator op,
 269                                               const Item &o2,
 270                                               const QExplicitlySharedDataPointer<DynamicContext> &) const
 271 {
 272     const AbstractDuration::Ptr duration(o1.as<AbstractDuration>());
 273     const AbstractDuration::Value op2 = o2.as<AbstractDuration>()->value();
 274
 275     switch(op)
 276     {
 277         case Div:
 278             return toItem(Decimal::fromValue(static_cast<xsDecimal>(duration->value()) / op2));
 279         case Substract:
 280             return duration->fromValue(duration->value() - op2);
 281         case Add:
 282             return duration->fromValue(duration->value() + op2);
 283         default:
 284         {
 285             Q_ASSERT(false);
 286             return Item(); /* Silence warning. */
 287         }
 288     }
 289 }
 290
 291 OperandSwitcherMathematician::
 292 OperandSwitcherMathematician(const AtomicMathematician::Ptr &mathematician) : m_mather(mathematician)
 293 {
 294     Q_ASSERT(mathematician);
 295 }
 296
 297 Item OperandSwitcherMathematician::calculate(const Item &o1,
 298                                              const Operator op,
 299                                              const Item &o2,
 300                                              const QExplicitlySharedDataPointer<DynamicContext> &context) const
 301 {
 302     return m_mather->calculate(o2, op, o1, context);
 303 }
 304
 305
 306 Item DateTimeDurationMathematician::calculate(const Item &o1,
 307                                               const Operator op,
 308                                               const Item &o2,
 309                                               const QExplicitlySharedDataPointer<DynamicContext> &context) const
 310 {
 311     Q_ASSERT(op == Substract || op == Add);
 312
 313     const AbstractDateTime::Ptr adt(o1.as<AbstractDateTime>());
 314     const AbstractDuration::Ptr dur(o2.as<AbstractDuration>());
 315     QDateTime dt(adt->toDateTime());
 316     //pDebug() << "DateTimeDurationMathematician::calculate():" << dt.toString();
 317     //dt.setDateOnly(false);
 318     const qint8 sign = (op == Add ? 1 : -1) * (dur->isPositive() ? 1 : -1);
 319
 320     // TODO milli seconds
 321     dt = dt.addSecs(sign * (dur->seconds() + dur->minutes() * 60 + dur->hours() * 60 * 60));
 322     dt = dt.addDays(sign * dur->days());
 323     dt = dt.addMonths(sign * dur->months());
 324     dt = dt.addYears(sign * dur->years());
 325
 326     QString msg;
 327
 328     if(AbstractDateTime::isRangeValid(dt.date(), msg))
 329         return adt->fromValue(dt);
 330     else
 331     {
 332         context->error(msg, ReportContext::FODT0001,
 333                        this);
 334         return Item();
 335     }
 336 }
 337
 338 Item AbstractDateTimeMathematician::calculate(const Item &o1,
 339                                               const Operator op,
 340                                               const Item &o2,
 341                                               const QExplicitlySharedDataPointer<DynamicContext> &) const
 342 {
 343     Q_ASSERT(op == Substract || op == Add);
 344     QDateTime dt1(o1.as<AbstractDateTime>()->toDateTime());
 345     QDateTime dt2(o2.as<AbstractDateTime>()->toDateTime());
 346
 347     const int diff = op == Add ? dt1.secsTo(dt2) : dt2.secsTo(dt1);
 348
 349     return toItem(DayTimeDuration::fromSeconds(diff));
 350 }
 351
 352 QT_END_NAMESPACE