自学教程：C++ DestroyString函数代码示例

WandExport MagickBooleanType IdentifyImageCommand(ImageInfo *image_info,  int argc,char **argv,char **metadata,ExceptionInfo *exception){#define DestroyIdentify() /{ /  DestroyImageStack(); /  for (i=0; i < (ssize_t) argc; i++) /    argv[i]=DestroyString(argv[i]); /  argv=(char **) RelinquishMagickMemory(argv); /}#define ThrowIdentifyException(asperity,tag,option) /{ /  (void) ThrowMagickException(exception,GetMagickModule(),asperity,tag,"`%s'", /    option); /  DestroyIdentify(); /  return(MagickFalse); /}#define ThrowIdentifyInvalidArgumentException(option,argument) /{ /  (void) ThrowMagickException(exception,GetMagickModule(),OptionError, /    "InvalidArgument","`%s': %s",option,argument); /  DestroyIdentify(); /  return(MagickFalse); /}  const char    *format,    *option;  Image    *image;  ImageStack    image_stack[MaxImageStackDepth+1];  MagickBooleanType    fire,    pend,    respect_parenthesis;  MagickStatusType    status;  register ssize_t    i;  size_t    count;  ssize_t    j,    k;  /*    Set defaults.  */  assert(image_info != (ImageInfo *) NULL);  assert(image_info->signature == MagickSignature);  if (image_info->debug != MagickFalse)    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");  assert(exception != (ExceptionInfo *) NULL);  if (argc == 2)    {      option=argv[1];      if ((LocaleCompare("version",option+1) == 0) ||          (LocaleCompare("-version",option+1) == 0))        {          (void) FormatLocaleFile(stdout,"Version: %s/n",            GetMagickVersion((size_t *) NULL));          (void) FormatLocaleFile(stdout,"Copyright: %s/n",            GetMagickCopyright());          (void) FormatLocaleFile(stdout,"Features: %s/n/n",            GetMagickFeatures());          return(MagickFalse);        }    }  if (argc < 2)    return(IdentifyUsage());  count=0;  format=NULL;  j=1;  k=0;  NewImageStack();  option=(char *) NULL;  pend=MagickFalse;  respect_parenthesis=MagickFalse;  status=MagickTrue;  /*    Identify an image.  */  ReadCommandlLine(argc,&argv);  status=ExpandFilenames(&argc,&argv);  if (status == MagickFalse)    ThrowIdentifyException(ResourceLimitError,"MemoryAllocationFailed",      GetExceptionMessage(errno));  image_info->ping=MagickTrue;  for (i=1; i < (ssize_t) argc; i++)  {    option=argv[i];    if (LocaleCompare(option,"(") == 0)//.........这里部分代码省略.........

//.........这里部分代码省略.........    if ((*p == '}') && (*(p+1) == ';'))      break;    p+=strlen(p);    if ((size_t) (p-xpm_buffer+MaxTextExtent) < length)      continue;    length<<=1;    xpm_buffer=(char *) ResizeQuantumMemory(xpm_buffer,length+MaxTextExtent,      sizeof(*xpm_buffer));    if (xpm_buffer == (char *) NULL)      break;    p=xpm_buffer+strlen(xpm_buffer);  }  if (xpm_buffer == (char *) NULL)    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");  /*    Remove comments.  */  count=0;  width=0;  for (p=xpm_buffer; *p != '/0'; p++)  {    if (*p != '"')      continue;    count=(ssize_t) sscanf(p+1,"%lu %lu %lu %lu",&columns,&rows,&colors,&width);    image->columns=columns;    image->rows=rows;    image->colors=colors;    if (count == 4)      break;  }  if ((count != 4) || (width > 10) || (image->columns == 0) ||      (image->rows == 0) || (image->colors == 0))    {      xpm_buffer=DestroyString(xpm_buffer);      ThrowReaderException(CorruptImageError,"ImproperImageHeader");    }  /*    Remove unquoted characters.  */  active=MagickFalse;  q=xpm_buffer;  while (*p != '/0')  {    if (*p++ == '"')      {        if (active != MagickFalse)          *q++='/n';        active=active != MagickFalse ? MagickFalse : MagickTrue;      }    if (active != MagickFalse)      *q++=(*p);  }  *q='/0';  /*    Initialize image structure.  */  xpm_colors=NewSplayTree(CompareXPMColor,RelinquishMagickMemory,    (void *(*)(void *)) NULL);  if (AcquireImageColormap(image,image->colors) == MagickFalse)    {      xpm_buffer=DestroyString(xpm_buffer);      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");    }  /*    Read image colormap.  */

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%                                                                             %%                                                                             %%                                                                             %%   R e a d L A B E L I m a g e                                               %%                                                                             %%                                                                             %%                                                                             %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  ReadLABELImage() reads a LABEL image file and returns it.  It%  allocates the memory necessary for the new Image structure and returns a%  pointer to the new image.%%  The format of the ReadLABELImage method is:%%      Image *ReadLABELImage(const ImageInfo *image_info,%        ExceptionInfo *exception)%%  A description of each parameter follows:%%    o image_info: the image info.%%    o exception: return any errors or warnings in this structure.%*/static Image *ReadLABELImage(const ImageInfo *image_info,  ExceptionInfo *exception){  char    geometry[MaxTextExtent],    *property;  const char    *label;  DrawInfo    *draw_info;  Image    *image;  MagickBooleanType    status;  TypeMetric    metrics;  size_t    height,    width;  /*    Initialize Image structure.  */  assert(image_info != (const ImageInfo *) NULL);  assert(image_info->signature == MagickSignature);  if (image_info->debug != MagickFalse)    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",      image_info->filename);  assert(exception != (ExceptionInfo *) NULL);  assert(exception->signature == MagickSignature);  image=AcquireImage(image_info,exception);  (void) ResetImagePage(image,"0x0+0+0");  property=InterpretImageProperties((ImageInfo *) image_info,image,    image_info->filename,exception);  (void) SetImageProperty(image,"label",property,exception);  property=DestroyString(property);  label=GetImageProperty(image,"label",exception);  draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);  draw_info->text=ConstantString(label);  status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);  if ((image->columns == 0) && (image->rows == 0))    {      image->columns=(size_t) (metrics.width+draw_info->stroke_width+0.5);      image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);    }  else    if (((image->columns == 0) || (image->rows == 0)) ||        (fabs(image_info->pointsize) < MagickEpsilon))      {        double          high,          low;        /*          Auto fit text into bounding box.        */        for ( ; ; draw_info->pointsize*=2.0)        {          (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",            -metrics.bounds.x1,metrics.ascent);          if (draw_info->gravity == UndefinedGravity)            (void) CloneString(&draw_info->geometry,geometry);          status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);          width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);          height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);          if ((image->columns != 0) && (image->rows != 0))            {//.........这里部分代码省略.........

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%                                                                             %%                                                                             %%                                                                             %+   L o a d M i m e L i s t                                                   %%                                                                             %%                                                                             %%                                                                             %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  LoadMimeList() loads the magic configuration file which provides a mapping%  between magic attributes and a magic name.%%  The format of the LoadMimeList method is:%%      MagickBooleanType LoadMimeList(const char *xml,const char *filename,%        const size_t depth,ExceptionInfo *exception)%%  A description of each parameter follows:%%    o xml:  The mime list in XML format.%%    o filename:  The mime list filename.%%    o depth: depth of <include /> statements.%%    o exception: return any errors or warnings in this structure.%*/static MagickBooleanType LoadMimeList(const char *xml,const char *filename,  const size_t depth,ExceptionInfo *exception){  const char    *attribute;  MimeInfo    *mime_info = (MimeInfo *) NULL;  MagickBooleanType    status;  XMLTreeInfo    *mime,    *mime_map,    *include;  /*    Load the mime map file.  */  (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),    "Loading mime map /"%s/" ...",filename);  if (xml == (const char *) NULL)    return(MagickFalse);  if (mime_list == (LinkedListInfo *) NULL)    {      mime_list=NewLinkedList(0);      if (mime_list == (LinkedListInfo *) NULL)        {          ThrowFileException(exception,ResourceLimitError,            "MemoryAllocationFailed",filename);          return(MagickFalse);        }    }  mime_map=NewXMLTree(xml,exception);  if (mime_map == (XMLTreeInfo *) NULL)    return(MagickFalse);  status=MagickTrue;  include=GetXMLTreeChild(mime_map,"include");  while (include != (XMLTreeInfo *) NULL)  {    /*      Process include element.    */    attribute=GetXMLTreeAttribute(include,"file");    if (attribute != (const char *) NULL)      {        if (depth > 200)          (void) ThrowMagickException(exception,GetMagickModule(),            ConfigureError,"IncludeElementNestedTooDeeply","'%s'",filename);        else          {            char              path[MaxTextExtent],              *xml;            GetPathComponent(filename,HeadPath,path);            if (*path != '/0')              (void) ConcatenateMagickString(path,DirectorySeparator,                MaxTextExtent);            if (*attribute == *DirectorySeparator)              (void) CopyMagickString(path,attribute,MaxTextExtent);            else              (void) ConcatenateMagickString(path,attribute,MaxTextExtent);            xml=FileToString(path,~0,exception);            if (xml != (char *) NULL)              {                status=LoadMimeList(xml,path,depth+1,exception);                xml=DestroyString(xml);              }//.........这里部分代码省略.........

MagickExport MagickBooleanType ResourceComponentGenesis(void){  char    *limit;  ssize_t    files,    pages,    pagesize;  MagickSizeType    memory;  /*    Set Magick resource limits.  */  AcquireSemaphoreInfo(&resource_semaphore);  pagesize=GetMagickPageSize();  pages=(-1);#if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)  pages=(ssize_t) sysconf(_SC_PHYS_PAGES);#endif  memory=(MagickSizeType) pages*pagesize;  if ((pagesize <= 0) || (pages <= 0))    memory=2048UL*1024UL*1024UL;#if defined(PixelCacheThreshold)  memory=PixelCacheThreshold;#endif  (void) SetMagickResourceLimit(AreaResource,2*memory/sizeof(PixelPacket));  (void) SetMagickResourceLimit(MemoryResource,memory);  (void) SetMagickResourceLimit(MapResource,2*memory);  limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("area");  if (limit != (char *) NULL)    {      (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));      limit=DestroyString(limit);    }  limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("memory");  if (limit != (char *) NULL)    {      (void) SetMagickResourceLimit(MemoryResource,        StringToSizeType(limit,100.0));      limit=DestroyString(limit);    }  limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("map");  if (limit != (char *) NULL)    {      (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));      limit=DestroyString(limit);    }  limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("disk");  if (limit != (char *) NULL)    {      (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));      limit=DestroyString(limit);    }  files=(-1);#if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)  files=(ssize_t) sysconf(_SC_OPEN_MAX);#endif#if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)  if (files < 0)    {      struct rlimit        resources;      if (getrlimit(RLIMIT_NOFILE,&resources) != -1)        files=(ssize_t) resources.rlim_cur;  }#endif#if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)  if (files < 0)    files=(ssize_t) getdtablesize();#endif  if (files < 0)    files=64;  (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)    (3*files/4),64));  limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("file");  if (limit != (char *) NULL)    {      (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,100.0));      limit=DestroyString(limit);    }  (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());  limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");  if (limit == (char *) NULL)    limit=GetPolicyValue("thread");  if (limit != (char *) NULL)    {//.........这里部分代码省略.........

//.........这里部分代码省略.........Tempstr=FormatStr(Tempstr,"%d",tty);if (! TTYAttribs) TTYAttribs=ListCreate();Curr=ListFindNamedItem(TTYAttribs,Tempstr);if (! Curr){old_tty_data=(struct termios *) calloc(1,sizeof(struct termios));ListAddNamedItem(TTYAttribs,Tempstr,old_tty_data);}else old_tty_data=(struct termios *) Curr->Item;tcgetattr(tty,old_tty_data);//tcgetattr(tty,&tty_data);memset(&tty_data,0,sizeof(tty_data));//ignore break characters and parity errorstty_data.c_iflag=IGNBRK | IGNPAR;//Enable Special Charactersif (Flags & TTYFLAG_CANON) tty_data.c_iflag|= ICANON;//else tty_data.c_iflag &= ~ICANON;/*if (! (Flags & TTYFLAG_CRLF_KEEP)){	//translate carriage-return to newline	if (Flags & TTYFLAG_CRLF) tty_data.c_iflag |= ICRNL;	else tty_data.c_iflag &= ~ICRNL;	//translate newline to carriage return	if (Flags & TTYFLAG_LFCR) 	{		tty_data.c_iflag |= INLCR;	}	else tty_data.c_iflag &= ~INLCR;	//output flags	tty_data.c_oflag=0;	//postprocess and translate newline to cr-nl	if (Flags & TTYFLAG_LFCR) tty_data.c_oflag |= ONLCR | OPOST;}*/tty_data.c_cflag=CREAD | CS8 | HUPCL | CLOCAL;if (Flags & TTYFLAG_SOFTWARE_FLOW) {tty_data.c_iflag |= IXON | IXOFF;}if (Flags & TTYFLAG_HARDWARE_FLOW) tty_data.c_cflag |=CRTSCTS;if (Flags & TTYFLAG_ECHO) tty_data.c_cflag |= ECHO;tty_data.c_lflag=0;if (Flags & TTYFLAG_ISIG) tty_data.c_lflag=ISIG;tty_data.c_cc[VMIN]=1;tty_data.c_cc[VTIME]=0;if (LineSpeed > 0){switch (LineSpeed){case 2400: val=B2400; break;case 4800: val=B4800; break;case 9600: val=B9600; break;case 19200: val=B19200; break;case 38400: val=B38400; break;case 57600: val=B57600; break;case 115200: val=B115200; break;case 230400: val=B230400; break;#ifdef B460800case 460800: val=B460800; break;#endif#ifdef B500000case 500000: val=B500000; break;#endif#ifdef B1000000case 10000000: val=B1000000; break;#endif#ifdef B1152000case 1152000: val=B1152000; break;#endif#ifdef B2000000case 2000000: val=B2000000; break;#endif#ifdef B4000000case 4000000: val=B4000000; break;#endifdefault: val=B115200; break;}cfsetispeed(&tty_data,val);cfsetospeed(&tty_data,val);}tcflush(tty,TCIFLUSH);result=tcsetattr(tty,TCSANOW,&tty_data);DestroyString(Tempstr);}

//.........这里部分代码省略.........          GrayQuantum,pixels,exception);        if (image->depth == 16)          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        if (((image->depth == 32) || (image->depth == 64)) &&            (quantum_info->format != FloatingPointQuantumFormat))          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        count=WriteBlob(image,length,pixels);        if (count != (ssize_t) length)          break;        status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,          image->rows);        if (status == MagickFalse)          break;      }    }  else    {      length=GetQuantumExtent(image,quantum_info,RedQuantum);      for (y=(ssize_t) image->rows-1; y >= 0; y--)      {        p=GetVirtualPixels(image,0,y,image->columns,1,exception);        if (p == (const Quantum *) NULL)          break;        length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,          RedQuantum,pixels,exception);        if (image->depth == 16)          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        if (((image->depth == 32) || (image->depth == 64)) &&            (quantum_info->format != FloatingPointQuantumFormat))          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        count=WriteBlob(image,length,pixels);        if (count != (ssize_t) length)          break;        status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,          image->rows);        if (status == MagickFalse)          break;      }      length=GetQuantumExtent(image,quantum_info,GreenQuantum);      for (y=(ssize_t) image->rows-1; y >= 0; y--)      {        p=GetVirtualPixels(image,0,y,image->columns,1,exception);        if (p == (const Quantum *) NULL)          break;        length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,          GreenQuantum,pixels,exception);        if (image->depth == 16)          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        if (((image->depth == 32) || (image->depth == 64)) &&            (quantum_info->format != FloatingPointQuantumFormat))          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        count=WriteBlob(image,length,pixels);        if (count != (ssize_t) length)          break;        status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,          image->rows);        if (status == MagickFalse)          break;      }      length=GetQuantumExtent(image,quantum_info,BlueQuantum);      for (y=(ssize_t) image->rows-1; y >= 0; y--)      {        p=GetVirtualPixels(image,0,y,image->columns,1,exception);        if (p == (const Quantum *) NULL)          break;        length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,          BlueQuantum,pixels,exception);        if (image->depth == 16)          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        if (((image->depth == 32) || (image->depth == 64)) &&            (quantum_info->format != FloatingPointQuantumFormat))          SetFITSUnsignedPixels(image->columns,image->depth,image->endian,            pixels);        count=WriteBlob(image,length,pixels);        if (count != (ssize_t) length)          break;        status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,          image->rows);        if (status == MagickFalse)          break;      }    }  quantum_info=DestroyQuantumInfo(quantum_info);  length=(size_t) (FITSBlocksize-TellBlob(image) % FITSBlocksize);  if (length != 0)    {      (void) ResetMagickMemory(fits_info,0,length*sizeof(*fits_info));      (void) WriteBlob(image,length,(unsigned char *) fits_info);    }  fits_info=DestroyString(fits_info);  (void) CloseBlob(image);  return(MagickTrue);}

WandExport MagickBooleanType ConjureImageCommand(ImageInfo *image_info,  int argc,char **argv,char **wand_unused(metadata),ExceptionInfo *exception){#define DestroyConjure() /{ /  image=DestroyImageList(image); /  for (i=0; i < (ssize_t) argc; i++) /    argv[i]=DestroyString(argv[i]); /  argv=(char **) RelinquishMagickMemory(argv); /}#define ThrowConjureException(asperity,tag,option) /{ /  (void) ThrowMagickException(exception,GetMagickModule(),asperity,tag,"`%s'", /     option); /  DestroyConjure(); /  return(MagickFalse); /}#define ThrowConjureInvalidArgumentException(option,argument) /{ /  (void) ThrowMagickException(exception,GetMagickModule(),OptionError, /    "InvalidArgument","'%s': %s",option,argument); /  DestroyConjure(); /  return(MagickFalse); /}  char    filename[MaxTextExtent],    *option;  Image    *image;  MagickStatusType    status;  register ssize_t    i;  ssize_t    number_images;  /*    Set defaults.  */  assert(image_info != (ImageInfo *) NULL);  assert(image_info->signature == MagickSignature);  if (image_info->debug != MagickFalse)    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");  assert(exception != (ExceptionInfo *) NULL);  if (argc < 2)    return(ConjureUsage());  image=NewImageList();  number_images=0;  option=(char *) NULL;  /*    Conjure an image.  */  ReadCommandlLine(argc,&argv);  status=ExpandFilenames(&argc,&argv);  if (status == MagickFalse)    ThrowConjureException(ResourceLimitError,"MemoryAllocationFailed",      GetExceptionMessage(errno));  for (i=1; i < (ssize_t) argc; i++)  {    option=argv[i];    if (IsCommandOption(option) != MagickFalse)      {        if (LocaleCompare("concurrent",option+1) == 0)          break;        if (LocaleCompare("debug",option+1) == 0)          {            ssize_t              event;            if (*option == '+')              break;            i++;            if (i == (ssize_t) argc)              ThrowConjureException(OptionError,"MissingArgument",option);            event=ParseCommandOption(MagickLogEventOptions,MagickFalse,argv[i]);            if (event < 0)              ThrowConjureException(OptionError,"UnrecognizedEventType",                argv[i]);            (void) SetLogEventMask(argv[i]);            continue;          }        if (LocaleCompare("duration",option+1) == 0)          {            if (*option == '+')              break;            i++;            if (i == (ssize_t) (argc-1))              ThrowConjureException(OptionError,"MissingArgument",option);            if (IsGeometry(argv[i]) == MagickFalse)              ThrowConjureInvalidArgumentException(option,argv[i]);            continue;          }        if ((LocaleCompare("help",option+1) == 0) ||            (LocaleCompare("-help",option+1) == 0))          {//.........这里部分代码省略.........

//.........这里部分代码省略.........            type_info->format=ConstantString(token);            break;          }        if (LocaleCompare((char *) keyword,"foundry") == 0)          {            type_info->foundry=ConstantString(token);            break;          }        if (LocaleCompare((char *) keyword,"fullname") == 0)          {            type_info->description=ConstantString(token);            break;          }        break;      }      case 'G':      case 'g':      {        if (LocaleCompare((char *) keyword,"glyphs") == 0)          {            char              *path;            path=ConstantString(token);#if defined(MAGICKCORE_WINDOWS_SUPPORT)            if (strchr(path,'@') != (char *) NULL)              SubstituteString(&path,"@[email
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