#include <stdio.h>#include <sys/stat.h>#include <malloc.h>          /* for halloc *//********************************************************************************NOTICE:                                                                       **This code is believed by the author to be bug free.  You are free to use and  **modify this code with the understanding that any use, either direct or        **derivative, must contain acknowledgement of its author and source.  The author**makes no warranty of any kind, expressed or implied, of merchantability or    **fitness for a particular purpose.  The author shall not be held liable for any**incidental or consequential damages in connection with or arising out of the  **furnishing, performance, or use of this software.  This software is not       **authorized for use in life support devices or systems.                        *********************************************************************************/int image_size(char file[], int *r, int *c){/*Written by James R. Nau, 6-Oct-89Attempt to find the size of an image in file pointed to by *file.Number of rows (down), and the number of columns (across) is returned.Uses a stat call to find the size of the file.  Then, attempts to finda pertinent number of rows and columns that we normally use.  Currentlysupported formats:   row x column  size        Format    128x128    16,384        Small Image    320x200    64,000        IBM VGA Style    256x256    65,536        Standard NASA Image (small)    256x384    98,304        IVG Low-Res Image    512x384   196,608        IVG High-Res Image    512x512   262,144        Standard NASA Image (large)    640x480   307,200        Super VGA (from GIF usually)    720x480   345,600    576x720   414,720	     JPEG imagesParameters:         *file: pointer to filename containing image          *row: pointer to the number of rows we decided on       *column: pointer to number of columns we decided onReturn values:        0: ok       -1: Couldn't use stat function       -2: Unknown image size*/   struct stat status;   int res;   long img_len;   res = stat (file, &status);   if (res != 0)   {      return (-1);   }   img_len = status.st_size;   if (img_len == 16384L)       /* For BUD's images */   {      *r = 128;      *c = 128;   }   else if (img_len == 64000L)  /* IBM VGA Screen */   {      *r = 200;      *c = 320;   }   else if (img_len == 65536L)  /* Standard */   {      *r = 256;      *c = 256;   }   else if (img_len == 98304L)  /* Low-Res IVG images */   {      *r = 256;      *c = 384;   }   else if (img_len == 196608L) /* Hi-Res IVG images */   {      *r = 512;      *c = 384;   }   else if (img_len == 262144L) /* Standard, but large... */   {      *r = 512;      *c = 512;   }   else if (img_len == 307200L) /* SVGA Hi-Res from GIFs */   {      *r = 480;      *c = 640;   }   else if (img_len == 345600L) /* mpeg frame 720 x 480 */   {      *r = 720;      *c = 480;   }   else if (img_len == 414720L) /* jpeg test image 576 x 720 */   {      *r = 576;      *c = 720;   }   else                         /* oops */   {      fprintf(stderr, "\nError, unknown image size: %ld\n", img_len);      return (-2);   }   return (0);}