/**************************************************************************** * NCSA HDF * * Software Development Group * * National Center for Supercomputing Applications * * University of Illinois at Urbana-Champaign * * 605 E. Springfield, Champaign IL 61820 * * * * For conditions of distribution and use, see the accompanying * * hdf/COPYING file. * * * MODIFICATIONS * Robb Matzke, 30 Aug 1997 * Added `ERRORS' fields to function prologues. * * ****************************************************************************/ #ifdef RCSID static char RcsId[] = "@(#)$Revision$"; #endif /* $Id$ */ /*LINTLIBRARY */ /* FILE hdf5file.c HDF5 file I/O routines EXPORTED ROUTINES H5Fcreate -- Create an HDF5 file H5Fclose -- Close an open HDF5 file LIBRARY-SCOPED ROUTINES LOCAL ROUTINES H5F_init_interface -- initialize the H5F interface */ /* Packages needed by this file... */ #include /*library functions */ #include /*atoms */ #include /*cache */ #include /*templates */ #include /*error handling */ #include /*symbol tables */ #include /*meta data */ #include /*core memory management */ #define PABLO_MASK H5F_mask /*--------------------- Locally scoped variables -----------------------------*/ /* Whether we've installed the library termination function yet for this interface */ static intn interface_initialize_g = FALSE; /*--------------------- Local function prototypes ----------------------------*/ static herr_t H5F_init_interface(void); static hdf5_file_t *H5F_new (void); static hdf5_file_t *H5F_dest (hdf5_file_t *f); static herr_t H5F_flush (hdf5_file_t *f, hbool_t invalidate); /*-------------------------------------------------------------------------- NAME H5F_init_interface -- Initialize interface-specific information USAGE herr_t H5F_init_interface() RETURNS SUCCEED/FAIL DESCRIPTION Initializes any interface-specific data or routines. ERRORS Modifications: Robb Matzke, 4 Aug 1997 Changed pablo mask from H5_mask to H5F_mask for the FUNC_LEAVE call. It was already H5F_mask for the PABLO_TRACE_ON call. --------------------------------------------------------------------------*/ static herr_t H5F_init_interface(void) { herr_t ret_value = SUCCEED; FUNC_ENTER (H5F_init_interface, NULL, FAIL); /* Initialize the atom group for the file IDs */ if((ret_value=H5Ainit_group(H5_FILE,H5A_FILEID_HASHSIZE,0))!=FAIL) ret_value=H5_add_exit(&H5F_term_interface); FUNC_LEAVE(ret_value); } /* H5F_init_interface */ /*-------------------------------------------------------------------------- NAME H5F_term_interface PURPOSE Terminate various H5F objects USAGE void H5F_term_interface() RETURNS SUCCEED/FAIL DESCRIPTION Release the atom group and any other resources allocated. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS Can't report errors... EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ void H5F_term_interface (void) { H5Adestroy_group(H5_FILE); } /* end H5F_term_interface() */ #ifdef LATER /*-------------------------------------------------------------------------- NAME H5F_encode_length_unusual -- encode an unusual length size USAGE void H5F_encode_length_unusual(f, p, l) const hdf5_file_t *f; IN: pointer to the file record uint8 **p; IN: pointer to buffer pointer to encode length in uint8 *l; IN: pointer to length to encode ERRORS RETURNS none DESCRIPTION Encode non-standard (i.e. not 2, 4 or 8-byte) lengths in file meta-data. --------------------------------------------------------------------------*/ void H5F_encode_length_unusual(const hdf5_file_t *f, uint8 **p, uint8 *l) { intn i = H5F_SIZEOF_SIZE (f); /* For non-little-endian platforms, encode each byte in memory backwards */ #if ((DF_MT&0xFFF0)!=0x4440) for(; i>=0; i--,(*p)++) *(*p)=*(l+i); #else /* platform has little-endian integers */ for(; i>=0; i--,(*p)++) *(*p)=*l; #endif #ifdef LATER done: if(ret_value == FALSE) { /* Error condition cleanup */ } /* end if */ #endif /* LATER */ /* Normal function cleanup */ } /* H5F_encode_length_unusual */ /*-------------------------------------------------------------------------- NAME H5F_encode_offset_unusual -- encode an unusual offset size USAGE void H5F_encode_offset_unusual(f, p, o) const hdf5_file_t *f; IN: pointer to the file record uint8 **p; IN: pointer to buffer pointer to encode offset in uint8 *o; IN: pointer to offset to encode ERRORS RETURNS none DESCRIPTION Encode non-standard (i.e. not 2, 4 or 8-byte) offsets in file meta-data. --------------------------------------------------------------------------*/ void H5F_encode_offset_unusual(const hdf5_file_t *f, uint8 **p, uint8 *o) { intn i = H5F_SIZEOF_OFFSET(f); /* For non-little-endian platforms, encode each byte in memory backwards */ #if ((DF_MT&0xFFF0)!=0x4440) for(; i>=0; i--,(*p)++) *(*p)=*(o+i); #else /* platform has little-endian integers */ for(; i>=0; i--,(*p)++) *(*p)=*o; #endif #ifdef LATER done: if(ret_value == FALSE) { /* Error condition cleanup */ } /* end if */ #endif /* LATER */ /* Normal function cleanup */ } /* H5F_encode_offset_unusual */ #endif /* LATER */ /*-------------------------------------------------------------------------- NAME H5F_compare_filename -- compare file objects for the atom API USAGE intn HPcompare_filename(obj, key) const VOIDP obj; IN: pointer to the file record const VOIDP key; IN: pointer to the name of file ERRORS RETURNS TRUE if the key matches the obj, FALSE otherwise DESCRIPTION Look inside the file record for the atom API and compare the the filenames. --------------------------------------------------------------------------*/ intn H5F_compare_filename (const VOIDP _obj, const VOIDP _key) { const hdf5_file_t *obj = (const hdf5_file_t *)_obj; const char *key = (const char *)_key; int ret_value = FALSE; FUNC_ENTER (H5F_compare_filename, NULL, FALSE); ret_value = !HDstrcmp (obj->filename, key); FUNC_LEAVE (ret_value); } /* H5F_compare_filename */ /*-------------------------------------------------------------------------- NAME H5Fget_create_template PURPOSE Get an atom for a copy of the file-creation template for this file USAGE hatom_t H5Fget_create_template(fid) hatom_t fid; IN: File ID ERRORS ATOM BADATOM Can't get file struct. FUNC CANTCREATE Can't create template. FUNC CANTINIT Can't init template. RETURNS Returns template ID on success, FAIL on failure DESCRIPTION This function returns an atom with a copy of the template parameters used to create a file. --------------------------------------------------------------------------*/ hatom_t H5Fget_create_template(hatom_t fid) { hdf5_file_t *file=NULL; /* file struct for file to close */ hatom_t ret_value = FAIL; FUNC_ENTER(H5Fget_create_template, H5F_init_interface, FAIL); /* Clear errors and check args and all the boring stuff. */ H5ECLEAR; /* Get the file structure */ if((file=H5Aatom_object(fid))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL); /*can't get file struct*/ /* Create the template object to return */ if((ret_value=H5Mcreate(fid,H5_TEMPLATE,NULL))==FAIL) HGOTO_ERROR(H5E_FUNC, H5E_CANTCREATE, FAIL); /*can't create template*/ if(H5C_init(ret_value,&(file->file_create_parms))==FAIL) HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL); /*can't init template*/ done: if(ret_value == FAIL) { /* Error condition cleanup */ } /* end if */ /* Normal function cleanup */ FUNC_LEAVE(ret_value); } /* end H5Fget_create_template() */ /*-------------------------------------------------------------------------- NAME H5Fis_hdf5 PURPOSE Check the file signature to detect an HDF5 file. USAGE hbool_t H5Fis_hdf5(filename) const char *filename; IN: Name of the file to check ERRORS ARGS BADRANGE No filename specified. FILE BADFILE Low-level file open failure. IO READERROR Read error. IO READERROR Seek error. IO SEEKERROR Unable to determine length of file due to seek failure. RETURNS TRUE/FALSE/FAIL DESCRIPTION This function determines if a file is an HDF5 format file. --------------------------------------------------------------------------*/ hbool_t H5Fis_hdf5(const char *filename) { hdf_file_t f_handle=H5F_INVALID_FILE; /* file handle */ uint8 temp_buf[H5F_SIGNATURE_LEN]; /* temporary buffer for checking file signature */ haddr_t curr_off=0; /* The current offset to check in the file */ size_t file_len=0; /* The length of the file we are checking */ hbool_t ret_value = BFALSE; FUNC_ENTER(H5Fis_hdf5, H5F_init_interface, BFAIL); /* Clear errors and check args and all the boring stuff. */ H5ECLEAR; if(filename==NULL) HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, BFAIL); /*no filename specified*/ /* Open the file */ f_handle=H5F_OPEN(filename,0); if(H5F_OPENERR(f_handle)) { /* Low-level file open failure */ HGOTO_ERROR(H5E_FILE, H5E_BADFILE, BFAIL); } /* Get the length of the file */ if(H5F_SEEKEND(f_handle)==FAIL) { /* Unable to determine length of file due to seek failure */ HGOTO_ERROR(H5E_IO, H5E_SEEKERROR, BFAIL); } file_len=H5F_TELL(f_handle); /* Check the offsets where the file signature is possible */ while(curr_offroot_sym = H5MM_xcalloc (1, sizeof (H5G_entry_t)); f->root_sym->type = H5G_NOTHING_CACHED; return f; } /*------------------------------------------------------------------------- * Function: H5F_dest * * Purpose: Destroys a file structure. This function does not flush * the cache or anything else; it only frees memory associated * with the file struct. * * Errors: * * Return: Success: NULL * * Failure: NULL * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 18 1997 * * Modifications: * *------------------------------------------------------------------------- */ static hdf5_file_t * H5F_dest (hdf5_file_t *f) { if (f) { H5AC_dest (f); f->dir = H5MM_xfree (f->dir); f->filename = H5MM_xfree (f->filename); f->root_sym = H5MM_xfree (f->root_sym); H5MM_xfree (f); } return NULL; } /*-------------------------------------------------------------------------- NAME H5Fcreate PURPOSE Create a new HDF5 file. USAGE int32 H5Fcreate(filename, flags, create_temp, access_temp) const char *filename; IN: Name of the file to create uintn flags; IN: Flags to indicate various options. hatom_t create_temp; IN: File-creation template ID hatom_t access_temp; IN: File-access template ID ERRORS ARGS BADVALUE Invalid file name. ARGS BADVALUE Invalid flags. ATOM BADATOM Can't atomize template. ATOM BADATOM Can't unatomize template. ATOM CANTREGISTER Can't atomize file. FILE CANTCREATE Unable to create the file due to low level create failure. FILE FILEEXISTS File already exists but overwrite permission was not given. FILE FILEOPEN File already open. IO CANTINIT Can't write file boot block. RESOURCE NOSPACE H5F_new() failed. RETURNS Returns file ID on success, FAIL on failure DESCRIPTION This is the primary function for creating HDF5 files . The flags parameter determines whether an existing file will be overwritten or not. All newly created files are opened for both reading and writing. All flags may be combined with the "||" (logical OR operator) to change the behavior of the file open call. The flags currently defined: H5ACC_OVERWRITE - Truncate file, if it already exists. The file will be truncated, erasing all data previously stored in the file. The more complex behaviors of a file's creation and access are controlled through the file-creation and file-access templates. The value of 0 for a template value indicates that the library should use the default values for the appropriate template. (Documented in the template module). [Access templates are currently unused in this routine, although they will be implemented in the future] MODIFICATIONS: Robb Matzke, 18 Jul 1997 File struct creation and destruction is through H5F_new() H5F_dest(). Writing the root symbol table entry is done with H5G_encode(). Robb Matzke, 29 Aug 1997 Moved creation of the boot block to H5F_flush(). --------------------------------------------------------------------------*/ hatom_t H5Fcreate(const char *filename, uintn flags, hatom_t create_temp, hatom_t access_temp) { hdf5_file_t *new_file=NULL; /* file struct for new file */ hdf_file_t f_handle=H5F_INVALID_FILE; /* file handle */ const file_create_temp_t *f_create_parms; /* pointer to the parameters to use when creating the file */ intn file_exists=0; /* flag to indicate that file exists already */ hatom_t ret_value = FAIL; FUNC_ENTER(H5Fcreate, H5F_init_interface, FAIL); /* Clear errors and check args and all the boring stuff. */ H5ECLEAR; if(filename==NULL) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL); /*invalid file name*/ if((flags&~H5ACC_OVERWRITE)!=0) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL); /*invalid flags*/ /* See if this file is already open */ if(H5Asearch_atom(H5_FILE,H5F_compare_filename,(const VOIDP)filename)!=NULL) HGOTO_ERROR(H5E_FILE, H5E_FILEOPEN, FAIL); /*file already open*/ /* Check if the file already exists */ f_handle=H5F_OPEN(filename,0); if(!H5F_OPENERR(f_handle)) { file_exists=1; /* set the flag to indicate that the file already exists */ H5F_CLOSE(f_handle); /* close the file we opened */ f_handle=H5F_INVALID_FILE; } /* end if */ if((flags&H5ACC_OVERWRITE)==0 && file_exists) { /* File already exists but overwrite permission was not given */ HGOTO_ERROR(H5E_FILE, H5E_FILEEXISTS, FAIL); } /* OK to create/overwrite the file */ f_handle=H5F_CREATE(filename); if(H5F_OPENERR(f_handle)) { /* Unable to create the file due to low level create failure */ HGOTO_ERROR(H5E_FILE, H5E_CANTCREATE, FAIL); } /* Create the file node */ if (NULL==(new_file=H5F_new())) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL); /*H5F_new() failed*/ /* Set the non-zero elements of the file structure */ new_file->dir=HDgetcwd(NULL,0); /* get the directory we just created the file within */ new_file->filename=HDstrdup(filename); /* make a copy of the filename */ new_file->acc_perm=H5ACC_WRITE; /* all new files we create have write permission */ new_file->file_handle=f_handle; /* keep the file handle we just opened */ new_file->ref_count=1; /* only 1 fid handed out so far */ new_file->consist_flags=0x03; /* Set file-consistency flags: write-access and "file is consistent" */ new_file->smallobj_off=0; /* Set the offset of the small-object heap */ new_file->freespace_off=0; /* Set the offset of the free-space info */ /* Get the file-creation template & record it */ if(create_temp==0) create_temp=H5C_get_default_atom(H5_TEMPLATE); if((f_create_parms=H5Aatom_object(create_temp))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL); /*can't atomize template*/ HDmemcpy(&new_file->file_create_parms,f_create_parms,sizeof(file_create_temp_t)); #ifdef LATER /* Get the file-access template & record it */ if(access_temp==0) access_temp=H5CPget_default_atom(H5_TEMPLATE); if((f_access_parms=H5Aatom_object(access_temp))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL); /*can't unatomize template*/ HDmemcpy(&new_file->file_access_parms,f_access_parms,sizeof(file_access_temp_t)); #endif /* LATER */ /* Flush the file signature and boot block */ if (H5F_flush (new_file, FALSE)<0) { HGOTO_ERROR (H5E_IO, H5E_CANTINIT, FAIL); /*can't write file boot block*/ } /* Get an atom for the file */ if((ret_value=H5Aregister_atom(H5_FILE, new_file))==FAIL) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL); /*can't atomize file*/ done: if(ret_value == FAIL) { /* Error condition cleanup */ /* Check if we left a dangling file handle */ if(f_handle!=H5F_INVALID_FILE) H5F_CLOSE(f_handle); /* close the file we opened */ /* Check if we left a dangling file struct */ if (new_file) H5F_dest (new_file); } /* Normal function cleanup */ FUNC_LEAVE(ret_value); } /* end H5Fcreate() */ /*-------------------------------------------------------------------------- NAME H5Fopen PURPOSE Open an existing HDF5 file. USAGE hatom_t H5Fopen(filename, flags, access_temp) const char *filename; IN: Name of the file to create uintn flags; IN: Flags to indicate various options. hatom_t access_temp; IN: File-access template ERRORS ARGS BADRANGE Invalid file name. ATOM BADATOM Can't atomize template. ATOM BADATOM Can't unatomize template. ATOM CANTREGISTER Can't atomize file. ATOM CANTREGISTER Can't register new_file atom. FILE CANTOPEN File doesn't exist. FILE NOTHDF5 Not an HDF5 file. FILE NOTHDF5 The file exists but doesn't appear to be an HDF5 file. IO READERROR Can't decode root symbol table entry. IO READERROR Read boot block failed. IO READERROR Read boot block signature failed. IO READERROR Seek to boot block failed. IO SEEKERROR Seek failed. RESOURCE NOSPACE H5F_new() failed. RETURNS Returns file ID on success, FAIL on failure DESCRIPTION This is the primary function for accessing existing HDF5 files. The flags parameter determines whether writing to an existing file will be allowed or not. All flags may be combined with the "||" (logical OR operator) to change the behavior of the file open call. The flags currently defined: H5ACC_WRITE - Allow writing to the file. The more complex behaviors of a file's access are controlled through the file-access template. MODIFICATIONS: Robb Matzke, 18 Jul 1997 File struct creation and destruction is through H5F_new() H5F_dest(). Reading the root symbol table entry is done with H5G_decode(). --------------------------------------------------------------------------*/ hatom_t H5Fopen(const char *filename, uintn flags, hatom_t access_temp) { hdf5_file_t *new_file=NULL; /* file struct for new file */ hdf_file_t f_handle=H5F_INVALID_FILE; /* file handle */ hatom_t create_temp; /* file-creation template ID */ const file_create_temp_t *f_create_parms; /* pointer to the parameters to use when creating the file */ uint8 temp_buf[2048], *p; /* temporary buffer for encoding header */ haddr_t curr_off=0; /* The current offset to check in the file */ size_t file_len=0; /* The length of the file we are checking */ hatom_t ret_value = FAIL; size_t variable_size; /*size of the variable part of the bb */ FUNC_ENTER(H5Fopen, H5F_init_interface, FAIL); /* Clear errors and check args and all the boring stuff. */ H5ECLEAR; if(filename==NULL) HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL);/*invalid file name*/ /* See if this file is already open */ new_file=H5Asearch_atom(H5_FILE,H5F_compare_filename,(const VOIDP)filename); /* If the file is already open, check the access permissions and go ahead with it */ if(new_file!=NULL && new_file->acc_perm==flags) { /* Get an atom for the file */ new_file->ref_count++; /* increment the reference count for the file */ if((ret_value=H5Aregister_atom(H5_FILE, new_file))==FAIL) { /* Can't register new_file atom */ HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL); } HGOTO_DONE(ret_value); } /* end if */ /* * If the file exists but has different permissions or if it's a new file, * start a new file handle for it, etc. */ if(H5Fis_hdf5(filename)==BFALSE) { /* The file exists but doesn't appear to be an HDF5 file */ HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL); } /* Check if the file already exists */ f_handle=H5F_OPEN(filename,flags); if(H5F_OPENERR(f_handle)) HGOTO_ERROR(H5E_FILE, H5E_CANTOPEN, FAIL);/*file doesn't exist*/ /* Create the file node */ if (NULL==(new_file=H5F_new())) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL);/*H5F_new() failed*/ /* Set the non-zero elements of the file structure */ new_file->dir=HDgetcwd(NULL,0); /* get the directory we just created the file within */ new_file->filename=HDstrdup(filename); /* make a copy of the filename */ new_file->acc_perm=flags; /* set the access permissions */ new_file->file_handle=f_handle; /* keep the file handle we just opened */ new_file->ref_count=1; /* only 1 fid handed out so far */ create_temp=H5C_get_default_atom(H5_TEMPLATE); if((f_create_parms=H5Aatom_object(create_temp))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);/*can't unatomize template*/ HDmemcpy(&new_file->file_create_parms,f_create_parms,sizeof(file_create_temp_t)); #ifdef LATER if(access_temp<=0) access_temp=H5CPget_default_atom(H5_TEMPLATE); if((f_access_parms=H5Aatom_object(access_temp))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);/*can't atomize template*/ HDmemcpy(&new_file->file_access_parms,f_access_parms,sizeof(file_access_temp_t)); #endif /* LATER */ /* Read the basic skeleton of the file */ /* Seek to the correct offset to read in the file signature & boot-block */ /* Get the length of the file */ if(H5F_SEEKEND(new_file->file_handle)==FAIL) HGOTO_ERROR(H5E_IO, H5E_SEEKERROR, BFAIL);/*seek failed*/ file_len=H5F_TELL(new_file->file_handle); /* Check the offsets where the file signature is possible */ while(curr_offfile_handle,curr_off)==FAIL) { /*seek to boot block failed*/ HGOTO_ERROR(H5E_IO, H5E_READERROR, BFAIL); } if(H5F_READ(new_file->file_handle,temp_buf, H5F_SIGNATURE_LEN)==FAIL) { /*read boot block signature failed*/ HGOTO_ERROR(H5E_IO, H5E_READERROR, BFAIL); } if(HDmemcmp(temp_buf,H5F_SIGNATURE,H5F_SIGNATURE_LEN)==0) { new_file->file_create_parms.userblock_size=curr_off; break; } /* end if */ if(curr_off==0) curr_off=512; else curr_off*=2; } /* end while */ if(curr_off>file_len) /* Why didn't H5Fis_hdf5 catch this? */ HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL); /*not an HDF5 file*/ /* Read in the fixed-size part of the boot-block */ if(H5F_READ(new_file->file_handle,temp_buf,16)==FAIL) HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL); /*read boot block failed*/ /* Decode fixed-size part of the boot block */ p=temp_buf; new_file->file_create_parms.bootblock_ver=*p++; /* Decode Boot-block version # */ new_file->file_create_parms.smallobject_ver=*p++; /* Decode Small-Object Heap version # */ new_file->file_create_parms.freespace_ver=*p++; /* Decode Free-Space Info version # */ new_file->file_create_parms.objectdir_ver=*p++; /* Decode Object Directory Format version # */ new_file->file_create_parms.sharedheader_ver=*p++; /* Decode Shared-Header Info version # */ new_file->file_create_parms.offset_size=*p++; /* Decode the number of bytes for the offset */ new_file->file_create_parms.length_size=*p++; /* Decode the number of bytes for the length */ p++; /* Decode the reserved byte :-) */ UINT16DECODE (p, new_file->file_create_parms.sym_leaf_k); /*stab leaf 1/2 rank*/ UINT16DECODE (p, new_file->file_create_parms.btree_k[H5B_SNODE_ID]); /*stab internal 1/2 rank*/ UINT32DECODE(p,new_file->consist_flags); /* Decode File-Consistancy flags */ /* Read the variable-size part of the boot-block */ variable_size = H5F_SIZEOF_OFFSET(new_file) + /*offset of global small-object heap*/ H5F_SIZEOF_OFFSET(new_file) + /*offset of global free list*/ H5F_SIZEOF_SIZE(new_file) + /*logical size of HDF5 file*/ H5G_SIZEOF_ENTRY(new_file); /*root symbol table entry*/ if (H5F_READ(new_file->file_handle, temp_buf, variable_size)<0) HGOTO_ERROR (H5E_IO, H5E_READERROR, FAIL); /*read boot block failed*/ /* Decode the variable-size part of the boot block */ p = temp_buf; H5F_decode_offset(new_file,p,new_file->smallobj_off); /* Decode offset of global small-object heap */ H5F_decode_offset(new_file,p,new_file->freespace_off); /* Decode offset of global free-space heap */ H5F_decode_length(new_file,p,new_file->logical_len); /* Decode logical length of file */ /* Decode the root symbol table entry */ if (H5G_decode (new_file, &p, new_file->root_sym)<0) { /*can't decode root symbol table entry */ HGOTO_ERROR (H5E_IO, H5E_READERROR, FAIL); } /* Get an atom for the file */ if((ret_value=H5Aregister_atom(H5_FILE, new_file))==FAIL) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL);/*can't atomize file*/ done: if(ret_value == FAIL) { /* Error condition cleanup */ /* Check if we left a dangling file handle */ if(f_handle!=H5F_INVALID_FILE) H5F_CLOSE(f_handle); /* close the file we opened */ /* Check if we left a dangling file struct */ if(new_file) HDfree(new_file); } /* Normal function cleanup */ FUNC_LEAVE(ret_value); } /* end H5Fopen() */ /*-------------------------------------------------------------------------- NAME H5Fflush PURPOSE Flush all cached data to disk and optionally invalidates all cached data. USAGE herr_t H5Fclose(fid, invalidate) hatom_t fid; IN: File ID of file to close. hbool_t invalidate; IN: Invalidate all of the cache? ERRORS ARGS BADTYPE Not a file atom. ATOM BADATOM Can't get file struct. CACHE CANTFLUSH Flush failed. RETURNS SUCCEED/FAIL DESCRIPTION This function flushes all cached data to disk and, if INVALIDATE is non-zero, removes cached objects from the cache so they must be re-read from the file on the next access to the object. MODIFICATIONS: --------------------------------------------------------------------------*/ herr_t H5Fflush (hatom_t fid, hbool_t invalidate) { hdf5_file_t *file = NULL; FUNC_ENTER (H5Fflush, H5F_init_interface, FAIL); H5ECLEAR; /* check arguments */ if (H5_FILE!=H5Aatom_group (fid)) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL); /*not a file atom*/ } if (NULL==(file=H5Aatom_object (fid))) { HRETURN_ERROR (H5E_ATOM, H5E_BADATOM, FAIL); /*can't get file struct*/ } /* do work */ if (H5F_flush (file, invalidate)<0) { HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL); /*flush failed*/ } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5F_flush * * Purpose: Flushes (and optionally invalidates) cached data plus the * file boot block. If the logical file size field is zero * then it is updated to be the length of the boot block. * * Errors: * CACHE CANTFLUSH Can't flush cache. * IO WRITEERROR Can't write header. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * robb@maya.nuance.com * Aug 29 1997 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5F_flush (hdf5_file_t *f, hbool_t invalidate) { uint8 buf[2048], *p=buf; FUNC_ENTER (H5F_flush, H5F_init_interface, FAIL); /* nothing to do if the file is read only */ if (0==(H5ACC_WRITE & f->acc_perm)) HRETURN (SUCCEED); /* flush (and invalidate) the entire cache */ if (H5AC_flush (f, NULL, 0, invalidate)<0) { HRETURN_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL); /*can't flush cache*/ } /* encode the file boot block */ HDmemcpy (p, H5F_SIGNATURE, H5F_SIGNATURE_LEN); p += H5F_SIGNATURE_LEN; *p++ = f->file_create_parms.bootblock_ver; *p++ = f->file_create_parms.smallobject_ver; *p++ = f->file_create_parms.freespace_ver; *p++ = f->file_create_parms.objectdir_ver; *p++ = f->file_create_parms.sharedheader_ver; *p++ = H5F_SIZEOF_OFFSET (f); *p++ = H5F_SIZEOF_SIZE (f); *p++ = 0; /*reserved*/ UINT16ENCODE (p, f->file_create_parms.sym_leaf_k); UINT16ENCODE (p, f->file_create_parms.btree_k[H5B_SNODE_ID]); UINT32ENCODE (p, f->consist_flags); H5F_encode_offset (f, p, f->smallobj_off); H5F_encode_offset (f, p, f->freespace_off); H5F_encode_length (f, p, f->logical_len); H5G_encode (f, &p, f->root_sym); /* write the boot block to disk */ if (H5F_block_write (f, 0, p-buf, buf)<0) { HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL); /*can't write header*/ } /* update file length if necessary */ if (f->logical_len<=0) f->logical_len = p-buf; FUNC_LEAVE (SUCCEED); } /*-------------------------------------------------------------------------- NAME H5Fclose PURPOSE Close an open HDF5 file. USAGE int32 H5Fclose(fid) int32 fid; IN: File ID of file to close ERRORS ARGS BADTYPE Not a file atom. ATOM BADATOM Can't remove atom. ATOM BADATOM Can't unatomize file. CACHE CANTFLUSH Can't flush cache. RETURNS SUCCEED/FAIL DESCRIPTION This function terminates access to an HDF5 file. If this is the last file ID open for a file and if access IDs are still in use, this function will fail. MODIFICATIONS: Robb Matzke, 18 Jul 1997 File struct destruction is through H5F_dest(). Robb Matzke, 29 Aug 1997 The file boot block is flushed to disk since it's contents may have changed. --------------------------------------------------------------------------*/ herr_t H5Fclose(hatom_t fid) { hdf5_file_t *file=NULL; /* file struct for file to close */ herr_t ret_value = SUCCEED; FUNC_ENTER(H5Fclose, H5F_init_interface, FAIL); /* Clear errors and check args and all the boring stuff. */ H5ECLEAR; if(H5Aatom_group(fid)!=H5_FILE) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL);/*not a file atom*/ /* Get the file handle to close */ if((file=H5Aatom_object(fid))==NULL) HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);/*can't unatomize file*/ /* Decrement the ref. count and recycle the file structure */ if((--file->ref_count)==0) { if(file->file_handle!=H5F_INVALID_FILE) { if (H5F_flush (file, TRUE)<0) { /*can't flush cache*/ HGOTO_ERROR (H5E_CACHE, H5E_CANTFLUSH, FAIL); } H5F_CLOSE(file->file_handle); } H5F_dest (file); if(H5Aremove_atom(fid)==NULL) { HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL);/*can't remove atom*/ } } /* end if */ done: if(ret_value == FAIL) { /* Error condition cleanup */ } /* end if */ /* Normal function cleanup */ FUNC_LEAVE(ret_value); } /* end H5Fclose() */ /*------------------------------------------------------------------------- * Function: H5F_block_read * * Purpose: Reads some data from a file/server/etc into a buffer. * The data is contiguous. * * Errors: * IO READERROR Low-level read failure. * IO SEEKERROR Low-level seek failure. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 10 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5F_block_read (hdf5_file_t *f, haddr_t addr, size_t size, void *buf) { FUNC_ENTER (H5F_block_read, H5F_init_interface, FAIL); if (0==size) return 0; addr += f->file_create_parms.userblock_size; if (H5F_SEEK (f->file_handle, addr)<0) { /* low-level seek failure */ HRETURN_ERROR (H5E_IO, H5E_SEEKERROR, FAIL); } if (H5F_READ (f->file_handle, buf, size)<0) { /* low-level read failure */ HRETURN_ERROR (H5E_IO, H5E_READERROR, FAIL); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5F_block_write * * Purpose: Writes some data from memory to a file/server/etc. The * data is contiguous. * * Errors: * IO SEEKERROR Low-level seek failure. * IO WRITEERROR Low-level write failure. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 10 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5F_block_write (hdf5_file_t *f, haddr_t addr, size_t size, void *buf) { FUNC_ENTER (H5F_block_write, H5F_init_interface, FAIL); if (0==size) return 0; addr += f->file_create_parms.userblock_size; if (H5F_SEEK (f->file_handle, addr)<0) { /* low-level seek failure */ HRETURN_ERROR (H5E_IO, H5E_SEEKERROR, FAIL); } if (H5F_WRITE (f->file_handle, buf, size)<0) { /* low-level write failure */ HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5F_debug * * Purpose: Prints a file header to the specified stream. Each line * is indented and the field name occupies the specified width * number of characters. * * Errors: * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * matzke@llnl.gov * Aug 1 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5F_debug (hdf5_file_t *f, haddr_t addr, FILE *stream, intn indent, intn fwidth) { FUNC_ENTER (H5F_debug, H5F_init_interface, FAIL); /* check args */ assert (f); assert (addr>=0); assert (stream); assert (indent>=0); assert (fwidth>=0); /* debug */ fprintf (stream, "%*sFile Boot Block...\n", indent, ""); fprintf (stream, "%*s%-*s %s\n", indent, "", fwidth, "Directory:", f->dir); fprintf (stream, "%*s%-*s %s\n", indent, "", fwidth, "File name:", f->filename); fprintf (stream, "%*s%-*s 0x%08x\n", indent, "", fwidth, "Permissions", (unsigned)(f->acc_perm)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Reference count:", (unsigned)(f->ref_count)); fprintf (stream, "%*s%-*s 0x%08lx\n", indent, "", fwidth, "Consistency flags:", (unsigned long)(f->consist_flags)); fprintf (stream, "%*s%-*s %ld\n", indent, "", fwidth, "Small object heap address:", (long)(f->smallobj_off)); fprintf (stream, "%*s%-*s %ld\n", indent, "", fwidth, "Free list address:", (long)(f->freespace_off)); fprintf (stream, "%*s%-*s %lu\n", indent, "", fwidth, "Logical file length:", (unsigned long)(f->logical_len)); fprintf (stream, "%*s%-*s %lu\n", indent, "", fwidth, "Size of user block:", (unsigned long)(f->file_create_parms.userblock_size)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Size of file size_t type:", (unsigned)(f->file_create_parms.offset_size)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Size of file off_t type:", (unsigned)(f->file_create_parms.length_size)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Symbol table leaf node 1/2 rank:", (unsigned)(f->file_create_parms.sym_leaf_k)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Symbol table internal node 1/2 rank:", (unsigned)(f->file_create_parms.btree_k[H5B_SNODE_ID])); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Boot block version number:", (unsigned)(f->file_create_parms.bootblock_ver)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Small object heap version number:", (unsigned)(f->file_create_parms.smallobject_ver)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Free list version number:", (unsigned)(f->file_create_parms.freespace_ver)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Object directory version number:", (unsigned)(f->file_create_parms.objectdir_ver)); fprintf (stream, "%*s%-*s %u\n", indent, "", fwidth, "Shared header version number:", (unsigned)(f->file_create_parms.sharedheader_ver)); fprintf (stream, "%*sRoot symbol table entry:\n", indent, ""); H5G_debug (f, f->root_sym, stream, indent+3, MAX(0, fwidth-3)); FUNC_LEAVE (SUCCEED); }