自学教程：C++ FCLOSE函数代码示例

/* * See if device can be mounted by looking in /etc/fstab. * If so, set device name and mount point name, and return 1, * otherwise return 0. */static int MountableDevice(const char *name, char **mountName, char **deviceName){	FILE *fp;	char line[1024];	char s1[1024];	char s2[1024];	int rc;	fp = fopen("/etc/fstab", "r");	if (fp == NULL) {/* * /etc/fstab may be unreadable in some situations due to passwords in the * file. */		return -1;	}	while (fgets(line, sizeof(line), fp) != 0) {		rc = sscanf(line, "%1023s %1023s", s1, s2);		if (rc >= 2 && s1[0] != '#' && strcmp(s2, name) == 0) {			FCLOSE(fp);			*deviceName = estrdup(s1);			*mountName = estrdup(s2);			return 1;		}	}	FCLOSE(fp);	return 0;}

static void DEHT_freeResources(DEHT * ht, bool_t removeFiles){	TRACE_FUNC_ENTRY();	CHECK (NULL != ht);	(void) fflush(ht->keyFP);	FCLOSE(ht->keyFP);	(void) fflush(ht->dataFP);	FCLOSE(ht->dataFP);	/* free ht cache if present */	FREE(ht->hashTableOfPointersImageInMemory);	FREE(ht->hashPointersForLastBlockImageInMemory);	FREE(ht->userBuf);	if (removeFiles) {		/* attempt to remove bad files. Errors are silenced */		CHECK(DEHT_removeFilesInternal(ht));	}	/* finally, free the ht itself */	FREE(ht);	goto LBL_CLEANUP;LBL_ERROR:	/* do nothing special - just quit */	TRACE_FUNC_ERROR();LBL_CLEANUP:	/* bye */	TRACE_FUNC_EXIT();	return;}

/****************************************************************************** * fileCopy: * Copy the file specified by "src" to the file specified by "dst". Error * checking is taken care of by the caplib functions (ie FOPEN, FWRITE, etc) */void fileCopy(const char *src, const char *dst){   char buffer[BUFFER_SIZE];   FILE *srcFp;   FILE *dstFp;   unsigned int amount;   srcFp = FOPEN( src, "rb" );   dstFp = FOPEN( dst, "wb" );   do {      amount = fread( buffer, sizeof(char), BUFFER_SIZE, srcFp );      if (amount) {         int a = fwrite( buffer, sizeof(char), amount, dstFp );	 if (a<amount) {	   asfPrintError("Error copying file %s -> %s/n"			 "Only %d of %d bytes written./n%s/n",			 src, dst, a, amount, strerror(errno));	 }      }   /* when amount read is < BUFSZ, copy is done */   } while (amount == BUFFER_SIZE);   FCLOSE(srcFp);   FCLOSE(dstFp);}

void floats_to_bytes_from_file_ext(const char *inFile, const char *outFile,  char *band, float mask, scale_t scaling, float scale_factor){  FILE *fp;  meta_parameters *meta;  float *float_data;  unsigned char *byte_data;  int ii, band_number;  long long pixel_count;  long offset;  meta = meta_read(inFile);  band_number = (!band || strlen(band) == 0 || strcmp(band, "???")==0) ? 0 :    get_band_number(meta->general->bands, meta->general->band_count, band);  pixel_count = meta->general->line_count * meta->general->sample_count;  offset = meta->general->line_count * band_number;  float_data = (float *) MALLOC(sizeof(float) * pixel_count);  fp = FOPEN(inFile, "rb");  get_float_lines(fp, meta, offset, meta->general->line_count, float_data);  FCLOSE(fp);  byte_data = floats_to_bytes_ext(float_data, pixel_count, mask, scaling,    scale_factor);  for (ii=0; ii<pixel_count; ii++)    float_data[ii] = (float) byte_data[ii];  meta->general->data_type = ASF_BYTE;  meta_write(meta, outFile);  fp = FOPEN(outFile, "wb");  put_float_lines(fp, meta, offset, meta->general->line_count, float_data);  FCLOSE(fp);  FREE(float_data);  FREE(byte_data);  meta_free(meta);}

static int isArcList(const char *sensor, const char *file){    if (!file)        return FALSE;    if (!strstr(file, "arclist"))        return FALSE;    if (!fileExists(file))        return FALSE;    FILE *fp = FOPEN(file, "r");    if (!fp)        return FALSE;    char line[1024];    if (fgets(line, 1024, fp) == NULL) {        FCLOSE(fp);        return FALSE;    }    FCLOSE(fp);    if (!strstr(line, sensor))        return FALSE;    return TRUE;}

/********************************************************************* Write the actual qmaster into the master_file -> master_file and master_host <- return -1   error in err_str            0   means OK     NOTES      MT-NOTE: write_qm_name() is MT safe *********************************************************************/int write_qm_name(const char *master_host,const char *master_file,char *err_str ) {   FILE *fp;   if (!(fp = fopen(master_file, "w"))) {      if (err_str)         sprintf(err_str, MSG_GDI_OPENWRITEMASTERHOSTNAMEFAILED_SS,                  master_file, strerror(errno));      return -1;   }   if (fprintf(fp, "%s/n", master_host) == EOF) {      if (err_str)         sprintf(err_str, MSG_GDI_WRITEMASTERHOSTNAMEFAILED_S ,                  master_file);      FCLOSE(fp);      return -1;   }    FCLOSE(fp);   return 0;FCLOSE_ERROR:   return -1;}

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