mclose.c

来自「支持各种栅格图像和矢量图像读取的库」· C语言 代码 · 共 97 行

/*******************************************************/
/*  Mclose.c               */
/*******************************************************/
/*  close map and if write permission write all    */
/*  resident data to file                           */
/*******************************************************/

#include "csf.h"
#include "csfimpl.h"

#include <string.h>  /* memset() */

/* close a map
 * the Mclose function closes a map
 * if the map is being used for output 
 * all header data is rewritten first
 * returns Upon succesful completion 0 is returned. 
 * Otherwise, a non-zero value is returned
 *
 * Merrno
 * WRITE_ERROR (map descriptor still in tact if this happens)
 */
int Mclose(
  MAP *m) /* map to close, map descriptor
             * is deallocated
             */
{
  CHECKHANDLE_GOTO(m, error);

  if (m->minMaxStatus == MM_WRONGVALUE)
  {
    CsfSetVarTypeMV( &(m->raster.minVal), m->raster.cellRepr);
    CsfSetVarTypeMV( &(m->raster.maxVal), m->raster.cellRepr);
  }

  /* if write permission , write all header data to file */
  if (WRITE_ENABLE(m))
  {
    char filler[MAX_HEADER_FILL_SIZE];
    (void)memset(filler, 0x0, (size_t)MAX_HEADER_FILL_SIZE);

    if (m->main.byteOrder != ORD_OK) {
     CsfSwap((void*)&(m->raster.minVal), CELLSIZE(m->raster.cellRepr),(size_t)1);
     CsfSwap((void*)&(m->raster.maxVal), CELLSIZE(m->raster.cellRepr),(size_t)1);
    }

    fseek(m->fp,(long)ADDR_MAIN_HEADER,SEEK_SET);
    if(m->write((void*)&(m->main.signature),sizeof(char), CSF_SIG_SPACE,m->fp)
                                                       != CSF_SIG_SPACE ||
       m->write((void*)&(m->main.version),sizeof(UINT2),(size_t)1,m->fp)!=1 ||
       m->write((void*)&(m->main.gisFileId),sizeof(UINT4),(size_t)1,m->fp)!=1 ||
       m->write((void*)&(m->main.projection),sizeof(UINT2),(size_t)1,m->fp)!=1 ||
       m->write((void*)&(m->main.attrTable),sizeof(UINT4),(size_t)1,m->fp)!=1 ||
       m->write((void*)&(m->main.mapType),sizeof(UINT2),(size_t)1,m->fp)!=1 ||
         fwrite((void*)&(m->main.byteOrder),sizeof(UINT4),(size_t)1,m->fp)!=1 ||
       m->write((void*)filler, sizeof(char), MAIN_HEADER_FILL_SIZE ,m->fp)
                                                          != MAIN_HEADER_FILL_SIZE )
    {  
      M_ERROR(WRITE_ERROR);
      goto error;
    }
    fseek(m->fp,ADDR_SECOND_HEADER, SEEK_SET);

    if (    m->write((void*)&(m->raster.valueScale),sizeof(UINT2),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.cellRepr), sizeof(UINT2),(size_t)1,m->fp) !=1 ||
        fwrite((void*)&(m->raster.minVal), sizeof(CSF_VAR_TYPE),(size_t)1,m->fp) !=1 ||
        fwrite((void*)&(m->raster.maxVal), sizeof(CSF_VAR_TYPE),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.xUL), sizeof(REAL8),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.yUL), sizeof(REAL8),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.nrRows), sizeof(UINT4),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.nrCols), sizeof(UINT4),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.cellSize), sizeof(REAL8),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.cellSizeDupl), sizeof(REAL8),(size_t)1,m->fp) !=1 ||
      m->write((void*)&(m->raster.angle), sizeof(REAL8),(size_t)1,m->fp) !=1 ||
            m->write((void*)filler, sizeof(char), RASTER_HEADER_FILL_SIZE ,m->fp)
                                                          != RASTER_HEADER_FILL_SIZE )
    {
      M_ERROR(WRITE_ERROR);
      goto error;
    }
  }

  (void)fclose(m->fp);
  CsfUnloadMap(m);

  /* clear the space, to avoid typical errors such as
     accessing the map after Mclose */
      (void)memset((void *)m->fileName, 0x0, strlen(m->fileName));
      CSF_FREE(m->fileName);

      (void)memset((void *)m, 0x0, sizeof(MAP));
  CSF_FREE(m);

  return(0);
error:  return(1);
}