C++ StringToDouble函数代码示例

void PipeDevice::ParseCommand(const std::string& command)
{
  std::vector<std::string> tokens;
  SplitString(command, ' ', tokens);
  if (tokens.size() < 2 || tokens.size() > 4)
    return;
  if (tokens[0] == "PRESS" || tokens[0] == "RELEASE")
  {
    auto search = m_buttons.find(tokens[1]);
    if (search != m_buttons.end())
      search->second->SetState(tokens[0] == "PRESS" ? 1.0 : 0.0);
  }
  else if (tokens[0] == "SET")
  {
    if (tokens.size() == 3)
    {
      double value = StringToDouble(tokens[2]);
      SetAxis(tokens[1], (value / 2.0) + 0.5);
    }
    else if (tokens.size() == 4)
    {
      double x = StringToDouble(tokens[2]);
      double y = StringToDouble(tokens[3]);
      SetAxis(tokens[1] + " X", x);
      SetAxis(tokens[1] + " Y", y);
    }
  }
}

void DoubleCoerce (FProduction *&prod1, FProduction *&prod2)
{
	if (prod1->Type == PROD_String)
	{
		prod1 = StringToDouble (prod1);
	}
	if (prod2->Type == PROD_String)
	{
		prod2 = StringToDouble (prod2);
	}
}

	void ChoiceForm::AutotuneButton_Clicked(GraphicsUI::UI_Base *)
	{
		if (currentShaderName.Length())
		{
			Autotune((float)StringToDouble(timeBudgetTextBox->GetText()));
		}
	}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   G e t Q u a n t u m I n f o                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetQuantumInfo() initializes the QuantumInfo structure to default values.
%
%  The format of the GetQuantumInfo method is:
%
%      GetQuantumInfo(const ImageInfo *image_info,QuantumInfo *quantum_info)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o quantum_info: the quantum info.
%
*/
MagickExport void GetQuantumInfo(const ImageInfo *image_info,
  QuantumInfo *quantum_info)
{
  const char
    *option;

  assert(quantum_info != (QuantumInfo *) NULL);
  (void) ResetMagickMemory(quantum_info,0,sizeof(*quantum_info));
  quantum_info->quantum=8;
  quantum_info->maximum=1.0;
  quantum_info->scale=QuantumRange;
  quantum_info->pack=MagickTrue;
  quantum_info->semaphore=AllocateSemaphoreInfo();
  quantum_info->signature=MagickSignature;
  if (image_info == (const ImageInfo *) NULL)
    return;
  option=GetImageOption(image_info,"quantum:format");
  if (option != (char *) NULL)
    quantum_info->format=(QuantumFormatType) ParseCommandOption(
      MagickQuantumFormatOptions,MagickFalse,option);
  option=GetImageOption(image_info,"quantum:minimum");
  if (option != (char *) NULL)
    quantum_info->minimum=StringToDouble(option,(char **) NULL);
  option=GetImageOption(image_info,"quantum:maximum");
  if (option != (char *) NULL)
    quantum_info->maximum=StringToDouble(option,(char **) NULL);
  if ((quantum_info->minimum == 0.0) && (quantum_info->maximum == 0.0))
    quantum_info->scale=0.0;
  else
    if (quantum_info->minimum == quantum_info->maximum)
      {
        quantum_info->scale=(MagickRealType) QuantumRange/quantum_info->minimum;
        quantum_info->minimum=0.0;
      }
    else
      quantum_info->scale=(MagickRealType) QuantumRange/(quantum_info->maximum-
        quantum_info->minimum);
  option=GetImageOption(image_info,"quantum:scale");
  if (option != (char *) NULL)
    quantum_info->scale=StringToDouble(option,(char **) NULL);
  option=GetImageOption(image_info,"quantum:polarity");
  if (option != (char *) NULL)
    quantum_info->min_is_white=LocaleCompare(option,"min-is-white") == 0 ?
      MagickTrue : MagickFalse;
  quantum_info->endian=image_info->endian;
  ResetQuantumState(quantum_info);
}

double Utils::GetDoubleFromJsonValue(Json::Value &value, double defaultValue) {
    double res = defaultValue;

    /* some json responses have doubles formated as strings,
    or an expected double is formated as an int */
    if (value.isString())
        res = StringToDouble(value.asString());
    else if (value.isInt() || value.isDouble())
        res = value.asDouble();

    return res;
}

Value* JSONReader::DecodeNumber(const Token& token)
{
    const std::wstring num_string(token.begin, token.length);

    int num_int;
    if(StringToInt(WideToUTF8(num_string), &num_int))
    {
        return Value::CreateIntegerValue(num_int);
    }

    double num_double;
    if(StringToDouble(WideToUTF8(num_string), &num_double) &&
            base::IsFinite(num_double))
    {
        return Value::CreateDoubleValue(num_double);
    }

    return NULL;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+     I s S c e n e G e o m e t r y                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsSceneGeometry() returns MagickTrue if the geometry is a valid scene
%  specification (e.g. [1], [1-9], [1,7,4]).
%
%  The format of the IsSceneGeometry method is:
%
%      MagickBooleanType IsSceneGeometry(const char *geometry,
%        const MagickBooleanType pedantic)
%
%  A description of each parameter follows:
%
%    o geometry: This string is the geometry specification.
%
%    o pedantic: A value other than 0 invokes a more restrictive set of
%      conditions for a valid specification (e.g. [1], [1-4], [4-1]).
%
*/
MagickExport MagickBooleanType IsSceneGeometry(const char *geometry,
  const MagickBooleanType pedantic)
{
  char
    *p;

  double
    value;

  if (geometry == (const char *) NULL)
    return(MagickFalse);
  p=(char *) geometry;
  value=StringToDouble(geometry,&p);
  (void) value;
  if (p == geometry)
    return(MagickFalse);
  if (strspn(geometry,"0123456789-, ") != strlen(geometry))
    return(MagickFalse);
  if ((pedantic != MagickFalse) && (strchr(geometry,',') != (char *) NULL))
    return(MagickFalse);
  return(MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   P a r s e A f f i n e G e o m e t r y                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ParseAffineGeometry() returns an affine matrix as defined by the geometry
%  string.
%
%  The format of the ParseAffineGeometry method is:
%
%      MagickStatusType ParseAffineGeometry(const char *geometry,
%        AffineMatrix *affine_matrix,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o geometry:  The geometry (e.g. 1.0,0.0,0.0,1.0,3.2,1.2).
%
%    o affine_matrix: the affine matrix as defined by the geometry string.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickStatusType ParseAffineGeometry(const char *geometry,
  AffineMatrix *affine_matrix,ExceptionInfo *exception)
{
  char
    token[MaxTextExtent];

  const char
    *p;

  double
    determinant;

  MagickStatusType
    flags;

  register ssize_t
    i;

  GetAffineMatrix(affine_matrix);
  flags=NoValue;
  p=(char *) geometry;
  for (i=0; (*p != '\0') && (i < 6); i++)
  {
    GetMagickToken(p,&p,token);
    if (*token == ',')
      GetMagickToken(p,&p,token);
    switch (i)
    {
      case 0: affine_matrix->sx=StringToDouble(token); break;
      case 1: affine_matrix->rx=StringToDouble(token); break;
      case 2: affine_matrix->ry=StringToDouble(token); break;
      case 3: affine_matrix->sy=StringToDouble(token); break;
      case 4: affine_matrix->tx=StringToDouble(token); flags|=XValue; break;
      case 5: affine_matrix->ty=StringToDouble(token); flags|=YValue; break;
    }
  }
  determinant=(affine_matrix->sx*affine_matrix->sy-affine_matrix->rx*
    affine_matrix->ry);
  if (fabs(determinant) < MagickEpsilon)
    (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
      "InvalidGeometry","`%s'",geometry);
  return(flags);
}

//.........这里部分代码省略.........
        status=GetMatrixElement(equivalences,ox,0,&object);
        while (object != root)
        {
          status=GetMatrixElement(equivalences,ox,0,&object);
          status=SetMatrixElement(equivalences,ox,0,&root);
        }
        oy=offset+neighbor_offset;
        status=GetMatrixElement(equivalences,oy,0,&object);
        while (object != root)
        {
          status=GetMatrixElement(equivalences,oy,0,&object);
          status=SetMatrixElement(equivalences,oy,0,&root);
        }
        status=SetMatrixElement(equivalences,y*image->columns+x,0,&root);
        p++;
      }
    }
  }
  image_view=DestroyCacheView(image_view);
  /*
    Label connected components.
  */
  n=0;
  component_view=AcquireAuthenticCacheView(component_image,exception);
  for (y=0; y < (ssize_t) component_image->rows; y++)
  {
    register PixelPacket
      *restrict q;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
    q=QueueCacheViewAuthenticPixels(component_view,0,y,component_image->columns,
      1,exception);
    if (q == (PixelPacket *) NULL)
      {
        status=MagickFalse;
        continue;
      }
    for (x=0; x < (ssize_t) component_image->columns; x++)
    {
      ssize_t
        id,
        offset;

      offset=y*image->columns+x;
      status=GetMatrixElement(equivalences,offset,0,&id);
      if (id == offset)
        {
          id=n++;
          status=SetMatrixElement(equivalences,offset,0,&id);
        }
      else
        {
          status=GetMatrixElement(equivalences,id,0,&id);
          status=SetMatrixElement(equivalences,offset,0,&id);
        }
      q->red=(Quantum) (id > (ssize_t) QuantumRange ? (ssize_t) QuantumRange :
        id);
      q->green=q->red;
      q->blue=q->red;
      q++;
    }
    if (SyncCacheViewAuthenticPixels(component_view,exception) == MagickFalse)
      status=MagickFalse;
    if (image->progress_monitor != (MagickProgressMonitor) NULL)
      {
        MagickBooleanType
          proceed;

        proceed=SetImageProgress(image,ConnectedComponentsImageTag,progress++,
          image->rows);
        if (proceed == MagickFalse)
          status=MagickFalse;
      }
  }
  component_view=DestroyCacheView(component_view);
  equivalences=DestroyMatrixInfo(equivalences);
  if (n > (ssize_t) QuantumRange)
    {
      component_image=DestroyImage(component_image);
      ThrowImageException(ResourceLimitError,"TooManyObjects");
    }
  artifact=GetImageArtifact(image,"connected-components:area-threshold");
  area_threshold=0.0;
  if (artifact != (const char *) NULL)
    area_threshold=StringToDouble(artifact,(char **) NULL);
  if (area_threshold > 0.0)
    status=MergeConnectedComponents(component_image,(size_t) n,area_threshold,
      exception);
  artifact=GetImageArtifact(image,"connected-components:verbose");
  if (IsMagickTrue(artifact) != MagickFalse)
    status=StatisticsComponentsStatistics(image,component_image,(size_t) n,
      exception);
  if (status == MagickFalse)
    component_image=DestroyImage(component_image);
  return(component_image);
}

//.........这里部分代码省略.........
            if (interpolate < 0)
              ThrowStreamException(OptionError,"UnrecognizedInterpolateMethod",
                argv[i]);
            break;
          }
        ThrowStreamException(OptionError,"UnrecognizedOption",option)
      }
      case 'l':
      {
        if (LocaleCompare("limit",option+1) == 0)
          {
            char
              *p;

            double
              value;

            ssize_t
              resource;

            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowStreamException(OptionError,"MissingArgument",option);
            resource=ParseCommandOption(MagickResourceOptions,MagickFalse,
              argv[i]);
            if (resource < 0)
              ThrowStreamException(OptionError,"UnrecognizedResourceType",
                argv[i]);
            i++;
            if (i == (ssize_t) argc)
              ThrowStreamException(OptionError,"MissingArgument",option);
            value=StringToDouble(argv[i],&p);
            (void) value;
            if ((p == argv[i]) && (LocaleCompare("unlimited",argv[i]) != 0))
              ThrowStreamInvalidArgumentException(option,argv[i]);
            break;
          }
        if (LocaleCompare("list",option+1) == 0)
          {
            ssize_t
              list;

            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowStreamException(OptionError,"MissingArgument",option);
            list=ParseCommandOption(MagickListOptions,MagickFalse,argv[i]);
            if (list < 0)
              ThrowStreamException(OptionError,"UnrecognizedListType",argv[i]);
            status=MogrifyImageInfo(image_info,(int) (i-j+1),(const char **)
              argv+j,exception);
            DestroyStream();
            return(status != 0 ? MagickFalse : MagickTrue);
          }
        if (LocaleCompare("log",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if ((i == (ssize_t) argc) || (strchr(argv[i],'%') == (char *) NULL))
              ThrowStreamException(OptionError,"MissingArgument",option);
            break;
          }

//.........这里部分代码省略.........
          proceed;

        proceed=SetImageProgress(image,ConnectedComponentsImageTag,progress++,
          image->rows);
        if (proceed == MagickFalse)
          status=MagickFalse;
      }
  }
  component_view=DestroyCacheView(component_view);
  image_view=DestroyCacheView(image_view);
  equivalences=DestroyMatrixInfo(equivalences);
  if (n > (ssize_t) MaxColormapSize)
    {
      object=(CCObjectInfo *) RelinquishMagickMemory(object);
      component_image=DestroyImage(component_image);
      ThrowImageException(ResourceLimitError,"TooManyObjects");
    }
  component_image->colors=(size_t) n;
  for (i=0; i < (ssize_t) component_image->colors; i++)
  {
    object[i].bounding_box.width-=(object[i].bounding_box.x-1);
    object[i].bounding_box.height-=(object[i].bounding_box.y-1);
    object[i].color.red=object[i].color.red/object[i].area;
    object[i].color.green=object[i].color.green/object[i].area;
    object[i].color.blue=object[i].color.blue/object[i].area;
    object[i].color.alpha=object[i].color.alpha/object[i].area;
    object[i].color.black=object[i].color.black/object[i].area;
    object[i].centroid.x=object[i].centroid.x/object[i].area;
    object[i].centroid.y=object[i].centroid.y/object[i].area;
  }
  artifact=GetImageArtifact(image,"connected-components:area-threshold");
  area_threshold=0.0;
  if (artifact != (const char *) NULL)
    area_threshold=StringToDouble(artifact,(char **) NULL);
  if (area_threshold > 0.0)
    {
      /*
        Merge object below area threshold.
      */
      component_view=AcquireAuthenticCacheView(component_image,exception);
      for (i=0; i < (ssize_t) component_image->colors; i++)
      {
        double
          census;

        RectangleInfo
          bounding_box;

        register ssize_t
          j;

        size_t
          id;

        if (status == MagickFalse)
          continue;
        if ((double) object[i].area >= area_threshold)
          continue;
        for (j=0; j < (ssize_t) component_image->colors; j++)
          object[j].census=0;
        bounding_box=object[i].bounding_box;
        for (y=0; y < (ssize_t) bounding_box.height+2; y++)
        {
          register const Quantum
            *magick_restrict p;

static void test_string_to_double(void)
{
    assert_true(1234.1234 == StringToDouble("1234.1234"));
}

//.........这里部分代码省略.........
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowImportException(OptionError,"MissingArgument",option);
            status=SetImageOption(image_info,"label",argv[i]);
            if (status == MagickFalse)
              ThrowImportException(OptionError,"UnrecognizedOption",argv[i]);
            break;
          }
        if (LocaleCompare("limit",option+1) == 0)
          {
            char
              *p;

            double
              value;

            ssize_t
              resource;

            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowImportException(OptionError,"MissingArgument",option);
            resource=ParseCommandOption(MagickResourceOptions,MagickFalse,
              argv[i]);
            if (resource < 0)
              ThrowImportException(OptionError,"UnrecognizedResourceType",
                argv[i]);
            i++;
            if (i == (ssize_t) argc)
              ThrowImportException(OptionError,"MissingArgument",option);
            value=StringToDouble(argv[i],&p);
            (void) value;
            if ((p == argv[i]) && (LocaleCompare("unlimited",argv[i]) != 0))
              ThrowImportInvalidArgumentException(option,argv[i]);
            break;
          }
        if (LocaleCompare("list",option+1) == 0)
          {
            ssize_t
              list;

            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowImportException(OptionError,"MissingArgument",option);
            list=ParseCommandOption(MagickListOptions,MagickFalse,argv[i]);
            if (list < 0)
              ThrowImportException(OptionError,"UnrecognizedListType",argv[i]);
            status=MogrifyImageInfo(image_info,(int) (i-j+1),(const char **)
              argv+j,exception);
            DestroyImport();
            return(status != 0 ? MagickFalse : MagickTrue);
          }
        if (LocaleCompare("log",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if ((i == (ssize_t) argc) || (strchr(argv[i],'%') == (char *) NULL))
              ThrowImportException(OptionError,"MissingArgument",option);
            break;
          }

//.........这里部分代码省略.........
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowCompareException(OptionError,"MissingArgument",option);
            if (IsGeometry(argv[i]) == MagickFalse)
              ThrowCompareInvalidArgumentException(option,argv[i]);
            break;
          }
        if (LocaleCompare("depth",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowCompareException(OptionError,"MissingArgument",option);
            if (IsGeometry(argv[i]) == MagickFalse)
              ThrowCompareInvalidArgumentException(option,argv[i]);
            break;
          }
        if (LocaleCompare("dissimilarity-threshold",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) argc)
              ThrowCompareException(OptionError,"MissingArgument",option);
            if (IsGeometry(argv[i]) == MagickFalse)
              ThrowCompareInvalidArgumentException(option,argv[i]);
            if (*option == '+')
              dissimilarity_threshold=DefaultDissimilarityThreshold;
            else
              dissimilarity_threshold=StringToDouble(argv[i],(char **) NULL);
            break;
          }
        if (LocaleCompare("duration",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) (argc-1))
              ThrowCompareException(OptionError,"MissingArgument",option);
            if (IsGeometry(argv[i]) == MagickFalse)
              ThrowCompareInvalidArgumentException(option,argv[i]);
            break;
          }
        ThrowCompareException(OptionError,"UnrecognizedOption",option)
      }
      case 'e':
      {
        if (LocaleCompare("encipher",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) (argc-1))
              ThrowCompareException(OptionError,"MissingArgument",option);
            break;
          }
        if (LocaleCompare("extract",option+1) == 0)
          {
            if (*option == '+')
              break;
            i++;
            if (i == (ssize_t) (argc-1))

//.........这里部分代码省略.........
        if (isspace((int) ((unsigned char) keyword[i])) != 0)
          break;
        keyword[i]=tolower((int) ((unsigned char) keyword[i]));
      }
      keyword[i]='\0';
      count=ReadBlob(image,72,(unsigned char *) value);
      if (count != 72)
        break;
      value[72]='\0';
      p=value;
      if (*p == '=')
        {
          p+=2;
          while (isspace((int) ((unsigned char) *p)) != 0)
            p++;
        }
      if (LocaleCompare(keyword,"end") == 0)
        break;
      if (LocaleCompare(keyword,"extend") == 0)
        fits_info.extend=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
      if (LocaleCompare(keyword,"simple") == 0)
        fits_info.simple=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
      if (LocaleCompare(keyword,"bitpix") == 0)
        fits_info.bits_per_pixel=StringToLong(p);
      if (LocaleCompare(keyword,"naxis") == 0)
        fits_info.number_axes=StringToLong(p);
      if (LocaleCompare(keyword,"naxis1") == 0)
        fits_info.columns=StringToLong(p);
      if (LocaleCompare(keyword,"naxis2") == 0)
        fits_info.rows=StringToLong(p);
      if (LocaleCompare(keyword,"naxis3") == 0)
        fits_info.number_planes=StringToLong(p);
      if (LocaleCompare(keyword,"datamax") == 0)
        fits_info.max_data=StringToDouble(p);
      if (LocaleCompare(keyword,"datamin") == 0)
        fits_info.min_data=StringToDouble(p);
      if (LocaleCompare(keyword,"bzero") == 0)
        fits_info.zero=StringToDouble(p);
      if (LocaleCompare(keyword,"bscale") == 0)
        fits_info.scale=StringToDouble(p);
      if (LocaleCompare(keyword,"comment") == 0)
        {
          if (comment == (char *) NULL)
            comment=ConstantString(p);
          else
            (void) ConcatenateString(&comment,p);
        }
      if (LocaleCompare(keyword,"xendian") == 0)
        {
          if (LocaleNCompare(p,"big",3) == 0)
            fits_info.endian=MSBEndian;
          else
            fits_info.endian=LSBEndian;
        }
      (void) FormatMagickString(property,MaxTextExtent,"fits:%s",keyword);
      (void) SetImageProperty(image,property,p);
    }
    c=0;
    while (((TellBlob(image) % FITSBlocksize) != 0) && (c != EOF))
      c=ReadBlobByte(image);
    if (fits_info.extend == MagickFalse)
      break;
    number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows;
    if ((fits_info.simple != MagickFalse) && (fits_info.number_axes >= 1) &&
        (fits_info.number_axes <= 4) && (number_pixels != 0))
      break;