/* Copyright 2003-2018, University Corporation for Atmospheric * Research. See COPYRIGHT file for copying and redistribution * conditions. */ /** * @file * @internal This file handles HDF5 attributes. * * @author Ed Hartnett */ #include "config.h" #include "hdf5internal.h" /** * @internal Get the attribute list for either a varid or NC_GLOBAL * * @param grp Group * @param varid Variable ID | NC_BLOGAL * @param varp Pointer that gets pointer to NC_VAR_INFO_T * instance. Ignored if NULL. * @param attlist Pointer that gets pointer to attribute list. * * @return NC_NOERR No error. * @author Dennis Heimbigner, Ed Hartnett * [Candidate for moving to libsrc4] */ static int getattlist(NC_GRP_INFO_T *grp, int varid, NC_VAR_INFO_T **varp, NCindex **attlist) { int retval; assert(grp && attlist); if (varid == NC_GLOBAL) { /* Do we need to read the atts? */ if (!grp->atts_read) if ((retval = nc4_read_atts(grp, NULL))) return retval; if (varp) *varp = NULL; *attlist = grp->att; } else { NC_VAR_INFO_T *var; if (!(var = (NC_VAR_INFO_T *)ncindexith(grp->vars, varid))) return NC_ENOTVAR; assert(var->hdr.id == varid); /* Do we need to read the atts? */ if (!var->atts_read) if ((retval = nc4_read_atts(grp, var))) return retval; if (varp) *varp = var; *attlist = var->att; } return NC_NOERR; } /** * @internal Get one of three special attributes, NCPROPS, * ISNETCDF4ATT, and SUPERBLOCKATT. These atts are not all really in * the file, they are constructed on the fly. * * @param h5 Pointer to HDF5 file info struct. * @param name Name of attribute. * @param filetypep Pointer that gets type of the attribute data in * file. * @param mem_type Type of attribute data in memory. * @param lenp Pointer that gets length of attribute array. * @param attnump Pointer that gets the attribute number. * @param data Attribute data. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @return ::NC_ERANGE Data conversion out of range. * @author Dennis Heimbigner */ int nc4_get_att_special(NC_FILE_INFO_T* h5, const char* name, nc_type* filetypep, nc_type mem_type, size_t* lenp, int* attnump, void* data) { /* Fail if asking for att id */ if(attnump) return NC_EATTMETA; if(strcmp(name,NCPROPS)==0) { int len; if(h5->provenance.ncproperties == NULL) return NC_ENOTATT; if(mem_type == NC_NAT) mem_type = NC_CHAR; if(mem_type != NC_CHAR) return NC_ECHAR; if(filetypep) *filetypep = NC_CHAR; len = strlen(h5->provenance.ncproperties); if(lenp) *lenp = len; if(data) strncpy((char*)data,h5->provenance.ncproperties,len+1); } else if(strcmp(name,ISNETCDF4ATT)==0 || strcmp(name,SUPERBLOCKATT)==0) { unsigned long long iv = 0; if(filetypep) *filetypep = NC_INT; if(lenp) *lenp = 1; if(strcmp(name,SUPERBLOCKATT)==0) iv = (unsigned long long)h5->provenance.superblockversion; else /* strcmp(name,ISNETCDF4ATT)==0 */ iv = NC4_isnetcdf4(h5); if(mem_type == NC_NAT) mem_type = NC_INT; if(data) switch (mem_type) { case NC_BYTE: *((char*)data) = (char)iv; break; case NC_SHORT: *((short*)data) = (short)iv; break; case NC_INT: *((int*)data) = (int)iv; break; case NC_UBYTE: *((unsigned char*)data) = (unsigned char)iv; break; case NC_USHORT: *((unsigned short*)data) = (unsigned short)iv; break; case NC_UINT: *((unsigned int*)data) = (unsigned int)iv; break; case NC_INT64: *((long long*)data) = (long long)iv; break; case NC_UINT64: *((unsigned long long*)data) = (unsigned long long)iv; break; default: return NC_ERANGE; } } return NC_NOERR; } /** * @internal I think all atts should be named the exact same thing, to * avoid confusion! * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param newname New name for attribute. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @return ::NC_EMAXNAME New name too long. * @return ::NC_EPERM File is read-only. * @return ::NC_ENAMEINUSE New name already in use. * @return ::NC_ENOTINDEFINE Classic model file not in define mode. * @return ::NC_EHDFERR HDF error. * @return ::NC_ENOMEM Out of memory. * @return ::NC_EINTERNAL Could not rebuild list. * @author Ed Hartnett */ int NC4_HDF5_rename_att(int ncid, int varid, const char *name, const char *newname) { NC_GRP_INFO_T *grp; NC_FILE_INFO_T *h5; NC_VAR_INFO_T *var = NULL; NC_ATT_INFO_T *att; NCindex *list; char norm_newname[NC_MAX_NAME + 1], norm_name[NC_MAX_NAME + 1]; hid_t datasetid = 0; int retval = NC_NOERR; if (!name || !newname) return NC_EINVAL; LOG((2, "nc_rename_att: ncid 0x%x varid %d name %s newname %s", ncid, varid, name, newname)); /* If the new name is too long, that's an error. */ if (strlen(newname) > NC_MAX_NAME) return NC_EMAXNAME; /* Find info for this file, group, and h5 info. */ if ((retval = nc4_find_grp_h5(ncid, &grp, &h5))) return retval; assert(h5 && grp); /* If the file is read-only, return an error. */ if (h5->no_write) return NC_EPERM; /* Check and normalize the name. */ if ((retval = nc4_check_name(newname, norm_newname))) return retval; /* Get the list of attributes. */ if ((retval = getattlist(grp, varid, &var, &list))) return retval; /* Is new name in use? */ att = (NC_ATT_INFO_T*)ncindexlookup(list,norm_newname); if(att != NULL) return NC_ENAMEINUSE; /* Normalize name and find the attribute. */ if ((retval = nc4_normalize_name(name, norm_name))) return retval; att = (NC_ATT_INFO_T*)ncindexlookup(list,norm_name); if (!att) return NC_ENOTATT; /* If we're not in define mode, new name must be of equal or less size, if complying with strict NC3 rules. */ if (!(h5->flags & NC_INDEF) && strlen(norm_newname) > strlen(att->hdr.name) && (h5->cmode & NC_CLASSIC_MODEL)) return NC_ENOTINDEFINE; /* Delete the original attribute, if it exists in the HDF5 file. */ if (att->created) { if (varid == NC_GLOBAL) { if (H5Adelete(((NC_HDF5_GRP_INFO_T *)(grp->format_grp_info))->hdf_grpid, att->hdr.name) < 0) return NC_EHDFERR; } else { if ((retval = nc4_open_var_grp2(grp, varid, &datasetid))) return retval; if (H5Adelete(datasetid, att->hdr.name) < 0) return NC_EHDFERR; } att->created = NC_FALSE; } /* Copy the new name into our metadata. */ if(att->hdr.name) free(att->hdr.name); if (!(att->hdr.name = strdup(norm_newname))) return NC_ENOMEM; att->dirty = NC_TRUE; /* Rehash the attribute list so that the new name is used */ if(!ncindexrebuild(list)) return NC_EINTERNAL; /* Mark attributes on variable dirty, so they get written */ if(var) var->attr_dirty = NC_TRUE; return retval; } /** * @internal Delete an att. Rub it out. Push the button on * it. Liquidate it. Bump it off. Take it for a one-way * ride. Terminate it. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute to delete. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @return ::NC_ENOTATT Attribute not found. * @return ::NC_EINVAL No name provided. * @return ::NC_EPERM File is read only. * @return ::NC_ENOTINDEFINE Classic model not in define mode. * @return ::NC_EINTERNAL Could not rebuild list. * @author Ed Hartnett, Dennis Heimbigner */ int NC4_HDF5_del_att(int ncid, int varid, const char *name) { NC_GRP_INFO_T *grp; NC_VAR_INFO_T *var; NC_FILE_INFO_T *h5; NC_ATT_INFO_T *att; NCindex* attlist = NULL; hid_t locid = 0; int i; size_t deletedid; int retval; /* Name must be provided. */ if (!name) return NC_EINVAL; LOG((2, "nc_del_att: ncid 0x%x varid %d name %s", ncid, varid, name)); /* Find info for this file, group, and h5 info. */ if ((retval = nc4_find_grp_h5(ncid, &grp, &h5))) return retval; assert(h5 && grp); /* If the file is read-only, return an error. */ if (h5->no_write) return NC_EPERM; /* If file is not in define mode, return error for classic model * files, otherwise switch to define mode. */ if (!(h5->flags & NC_INDEF)) { if (h5->cmode & NC_CLASSIC_MODEL) return NC_ENOTINDEFINE; if ((retval = NC4_redef(ncid))) return retval; } /* Get either the global or a variable attribute list. */ if ((retval = getattlist(grp, varid, &var, &attlist))) return retval; /* Determine the location id in the HDF5 file. */ if (varid == NC_GLOBAL) locid = ((NC_HDF5_GRP_INFO_T *)(grp->format_grp_info))->hdf_grpid; else if (var->created) locid = ((NC_HDF5_VAR_INFO_T *)(var->format_var_info))->hdf_datasetid; /* Now find the attribute by name. */ if (!(att = (NC_ATT_INFO_T*)ncindexlookup(attlist, name))) return NC_ENOTATT; /* Reclaim the content of the attribute */ if(att->data) if((retval = NC_reclaim_data_all(h5->controller,att->nc_typeid,att->data,att->len))) return retval; att->data = NULL; att->len = 0; /* Delete it from the HDF5 file, if it's been created. */ if (att->created) { assert(locid); if (H5Adelete(locid, att->hdr.name) < 0) return NC_EATTMETA; } deletedid = att->hdr.id; /* reclaim associated HDF5 info */ if((retval=nc4_HDF5_close_att(att))) return retval; /* Remove this attribute in this list */ if ((retval = nc4_att_list_del(attlist, att))) return retval; /* Renumber all attributes with higher indices. */ for (i = 0; i < ncindexsize(attlist); i++) { NC_ATT_INFO_T *a; if (!(a = (NC_ATT_INFO_T *)ncindexith(attlist, i))) continue; if (a->hdr.id > deletedid) a->hdr.id--; } /* Rebuild the index. */ if (!ncindexrebuild(attlist)) return NC_EINTERNAL; return NC_NOERR; } /** * @internal This will return the length of a netcdf atomic data type * in bytes. * * @param type A netcdf atomic type. * * @return Type size in bytes, or -1 if type not found. * @author Ed Hartnett */ static int nc4typelen(nc_type type) { switch(type){ case NC_BYTE: case NC_CHAR: case NC_UBYTE: return 1; case NC_USHORT: case NC_SHORT: return 2; case NC_FLOAT: case NC_INT: case NC_UINT: return 4; case NC_DOUBLE: case NC_INT64: case NC_UINT64: return 8; } return -1; } /** * @internal * Write an attribute to a netCDF-4/HDF5 file, converting * data type if necessary. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param file_type Type of the attribute data in file. * @param len Number of elements in attribute array. * @param data Attribute data. * @param mem_type Type of data in memory. * @param force write even if the attribute is special * * @return ::NC_NOERR No error. * @return ::NC_EINVAL Invalid parameters. * @return ::NC_EBADID Bad ncid. * @return ::NC_ENOTVAR Variable not found. * @return ::NC_EBADNAME Name contains illegal characters. * @return ::NC_ENAMEINUSE Name already in use. * @author Ed Hartnett, Dennis Heimbigner */ int nc4_put_att(NC_GRP_INFO_T* grp, int varid, const char *name, nc_type file_type, size_t len, const void *data, nc_type mem_type, int force) { NC* nc; NC_FILE_INFO_T *h5; NC_VAR_INFO_T *var = NULL; NCindex* attlist = NULL; NC_ATT_INFO_T* att; char norm_name[NC_MAX_NAME + 1]; nc_bool_t new_att = NC_FALSE; int retval = NC_NOERR, range_error = 0; size_t type_size; int ret; int ncid; void* copy = NULL; /* Save the old att data and length and old fillvalue in case we need to rollback on error */ struct Save { size_t len; void* data; nc_type type; /* In case we change the type of the attribute */ } attsave = {0,NULL,-1}; struct Save fillsave = {0,NULL,-1}; h5 = grp->nc4_info; nc = h5->controller; assert(nc && grp && h5); ncid = nc->ext_ncid | grp->hdr.id; /* Find att, if it exists. (Must check varid first or nc_test will * break.) This also does lazy att reads if needed. */ if ((ret = getattlist(grp, varid, &var, &attlist))) return ret; /* The length needs to be positive (cast needed for braindead systems with signed size_t). */ if((unsigned long) len > X_INT_MAX) return NC_EINVAL; /* Check name before LOG statement. */ if (!name || strlen(name) > NC_MAX_NAME) return NC_EBADNAME; LOG((1, "%s: ncid 0x%x varid %d name %s file_type %d mem_type %d len %d", __func__,ncid, varid, name, file_type, mem_type, len)); /* If len is not zero, then there must be some data. */ if (len && !data) return NC_EINVAL; /* If the file is read-only, return an error. */ if (h5->no_write) return NC_EPERM; /* Check and normalize the name. */ if ((retval = nc4_check_name(name, norm_name))) return retval; /* Check that a reserved att name is not being used improperly */ const NC_reservedatt* ra = NC_findreserved(name); if(ra != NULL && !force) { /* case 1: grp=root, varid==NC_GLOBAL, flags & READONLYFLAG */ if (nc->ext_ncid == ncid && varid == NC_GLOBAL && grp->parent == NULL && (ra->flags & READONLYFLAG)) return NC_ENAMEINUSE; /* case 2: grp=NA, varid!=NC_GLOBAL, flags & HIDDENATTRFLAG */ if (varid != NC_GLOBAL && (ra->flags & (HIDDENATTRFLAG|READONLYFLAG))) return NC_ENAMEINUSE; } /* See if there is already an attribute with this name. */ att = (NC_ATT_INFO_T*)ncindexlookup(attlist,norm_name); if (!att) { /* If this is a new att, require define mode. */ if (!(h5->flags & NC_INDEF)) { if (h5->cmode & NC_CLASSIC_MODEL) return NC_ENOTINDEFINE; if ((retval = NC4_redef(ncid))) BAIL(retval); } new_att = NC_TRUE; } else { /* For an existing att, if we're not in define mode, the len must not be greater than the existing len for classic model. */ if (!(h5->flags & NC_INDEF) && len * nc4typelen(file_type) > (size_t)att->len * nc4typelen(att->nc_typeid)) { if (h5->cmode & NC_CLASSIC_MODEL) return NC_ENOTINDEFINE; if ((retval = NC4_redef(ncid))) BAIL(retval); } } /* We must have two valid types to continue. */ if (file_type == NC_NAT || mem_type == NC_NAT) return NC_EBADTYPE; /* No character conversions are allowed. */ if (file_type != mem_type && (file_type == NC_CHAR || mem_type == NC_CHAR || file_type == NC_STRING || mem_type == NC_STRING)) return NC_ECHAR; /* For classic mode file, only allow atts with classic types to be * created. */ if (h5->cmode & NC_CLASSIC_MODEL && file_type > NC_DOUBLE) return NC_ESTRICTNC3; /* Add to the end of the attribute list, if this att doesn't already exist. */ if (new_att) { LOG((3, "adding attribute %s to the list...", norm_name)); if ((ret = nc4_att_list_add(attlist, norm_name, &att))) BAIL(ret); /* Allocate storage for the HDF5 specific att info. */ if (!(att->format_att_info = calloc(1, sizeof(NC_HDF5_ATT_INFO_T)))) BAIL(NC_ENOMEM); if(varid == NC_GLOBAL) att->container = (NC_OBJ*)grp; else att->container = (NC_OBJ*)var; } /* Now fill in the metadata. */ att->dirty = NC_TRUE; /* When we reclaim existing data, make sure to use the right type */ if(new_att) attsave.type = file_type; else attsave.type = att->nc_typeid; att->nc_typeid = file_type; /* Get information about this (possibly new) type. */ if ((retval = nc4_get_typelen_mem(h5, file_type, &type_size))) return retval; if (att->data) { assert(attsave.data == NULL); attsave.data = att->data; attsave.len = att->len; att->data = NULL; } /* If this is the _FillValue attribute, then we will also have to * copy the value to the fill_vlue pointer of the NC_VAR_INFO_T * struct for this var. (But ignore a global _FillValue * attribute). * Since fill mismatch is no longer required, we need to convert the * att's type to the vars's type as part of storing. */ if (!strcmp(att->hdr.name, _FillValue) && varid != NC_GLOBAL) { /* Fill value must have exactly one value */ if (len != 1) BAIL(NC_EINVAL); /* If we already wrote to the dataset, then return an error. */ if (var->written_to) BAIL(NC_ELATEFILL); /* Get the length of the variable's data type. */ if ((retval = nc4_get_typelen_mem(grp->nc4_info, var->type_info->hdr.id, &type_size))) BAIL(retval); /* Fill value must be same type and have exactly one value */ if (att->nc_typeid != var->type_info->hdr.id) return NC_EBADTYPE; /* Already set a fill value? Now I'll have to free the old * one. Make up your damn mind, would you? */ if (var->fill_value) { /* reclaim later */ fillsave.data = var->fill_value; fillsave.type = var->type_info->hdr.id; fillsave.len = 1; var->fill_value = NULL; } /* Determine the size of the fill value in bytes. */ { nc_type var_type = var->type_info->hdr.id; size_t var_type_size = var->type_info->size; /* The old code used the var's type as opposed to the att's type; normally same, but not required. Now we need to convert from the att's type to the var's type. Note that we use mem_type rather than file_type because our data is in the form of the memory data. When we later capture the memory data for the actual attribute, we will use file_type as the target of the conversion. */ if(mem_type != var_type && mem_type < NC_STRING && var_type < NC_STRING) { /* Need to convert from memory data into copy buffer */ if((copy = malloc(len*var_type_size))==NULL) BAIL(NC_ENOMEM); if ((retval = nc4_convert_type(data, copy, mem_type, var_type, len, &range_error, NULL, (h5->cmode & NC_CLASSIC_MODEL), NC_NOQUANTIZE, 0))) BAIL(retval); } else { /* no conversion */ /* Still need a copy of the input data */ copy = NULL; if((retval = NC_copy_data_all(h5->controller, mem_type, data, 1, ©))) BAIL(retval); } var->fill_value = copy; copy = NULL; } /* Indicate that the fill value was changed, if the variable has already * been created in the file, so the dataset gets deleted and re-created. */ if (var->created) var->fill_val_changed = NC_TRUE; } /* Copy the attribute data, if there is any. */ if (len) { nc_type type_class; /* Class of attribute's type */ /* Get class for this type. */ if ((retval = nc4_get_typeclass(h5, file_type, &type_class))) BAIL(retval); assert(data); { /* Allocate top level of the copy */ if (!(copy = malloc(len * type_size))) BAIL(NC_ENOMEM); /* Special case conversion from memory to file type */ if(mem_type != file_type && mem_type < NC_STRING && file_type < NC_STRING) { if ((retval = nc4_convert_type(data, copy, mem_type, file_type, len, &range_error, NULL, (h5->cmode & NC_CLASSIC_MODEL), NC_NOQUANTIZE, 0))) BAIL(retval); } else if(mem_type == file_type) { /* General case: no conversion */ if((retval = NC_copy_data(h5->controller,file_type,data,len,copy))) BAIL(retval); } else BAIL(NC_EURL); /* Store it */ att->data = copy; copy = NULL; } } att->dirty = NC_TRUE; att->created = NC_FALSE; att->len = len; /* Mark attributes on variable dirty, so they get written */ if(var) var->attr_dirty = NC_TRUE; /* Reclaim saved data */ if(attsave.data != NULL) { assert(attsave.len > 0); (void)NC_reclaim_data_all(h5->controller,attsave.type,attsave.data,attsave.len); attsave.len = 0; attsave.data = NULL; } if(fillsave.data != NULL) { assert(fillsave.len > 0); (void)NC_reclaim_data_all(h5->controller,fillsave.type,fillsave.data,fillsave.len); fillsave.len = 0; fillsave.data = NULL; } exit: if(copy) (void)NC_reclaim_data_all(h5->controller,file_type,copy,len); if(retval) { /* Rollback */ if(attsave.data != NULL) { assert(attsave.len > 0); if(att->data) (void)NC_reclaim_data_all(h5->controller,attsave.type,att->data,att->len); att->len = attsave.len; att->data = attsave.data; } if(fillsave.data != NULL) { assert(fillsave.len > 0); if(att->data) (void)NC_reclaim_data_all(h5->controller,fillsave.type,var->fill_value,1); var->fill_value = fillsave.data; } } /* If there was an error return it, otherwise return any potential range error value. If none, return NC_NOERR as usual.*/ if (range_error) return NC_ERANGE; if (retval) return retval; return NC_NOERR; } /** * @internal Write an attribute to a netCDF-4/HDF5 file, converting * data type if necessary. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param file_type Type of the attribute data in file. * @param len Number of elements in attribute array. * @param data Attribute data. * @param mem_type Type of data in memory. * * @return ::NC_NOERR No error. * @return ::NC_EINVAL Invalid parameters. * @return ::NC_EBADID Bad ncid. * @return ::NC_ENOTVAR Variable not found. * @return ::NC_EBADNAME Name contains illegal characters. * @return ::NC_ENAMEINUSE Name already in use. * @author Ed Hartnett, Dennis Heimbigner */ int NC4_HDF5_put_att(int ncid, int varid, const char *name, nc_type file_type, size_t len, const void *data, nc_type mem_type) { NC_FILE_INFO_T *h5; NC_GRP_INFO_T *grp; int ret; /* Find info for this file, group, and h5 info. */ if ((ret = nc4_find_nc_grp_h5(ncid, NULL, &grp, &h5))) return ret; assert(grp && h5); return nc4_put_att(grp, varid, name, file_type, len, data, mem_type, 0); } /** * @internal Learn about an att. All the nc4 nc_inq_ functions just * call nc4_get_att to get the metadata on an attribute. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param xtypep Pointer that gets type of attribute. * @param lenp Pointer that gets length of attribute data array. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @author Ed Hartnett */ int NC4_HDF5_inq_att(int ncid, int varid, const char *name, nc_type *xtypep, size_t *lenp) { NC_FILE_INFO_T *h5; NC_GRP_INFO_T *grp; NC_VAR_INFO_T *var = NULL; char norm_name[NC_MAX_NAME + 1]; int retval; LOG((2, "%s: ncid 0x%x varid %d", __func__, ncid, varid)); /* Find the file, group, and var info, and do lazy att read if * needed. */ if ((retval = nc4_hdf5_find_grp_var_att(ncid, varid, name, 0, 1, norm_name, &h5, &grp, &var, NULL))) return retval; /* If this is one of the reserved atts, use nc_get_att_special. */ if (!var) { const NC_reservedatt *ra = NC_findreserved(norm_name); if (ra && ra->flags & NAMEONLYFLAG) return nc4_get_att_special(h5, norm_name, xtypep, NC_NAT, lenp, NULL, NULL); } return nc4_get_att_ptrs(h5, grp, var, norm_name, xtypep, NC_NAT, lenp, NULL, NULL); } /** * @internal Learn an attnum, given a name. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param attnump Pointer that gets the attribute index number. * * @return ::NC_NOERR No error. * @author Ed Hartnett */ int NC4_HDF5_inq_attid(int ncid, int varid, const char *name, int *attnump) { NC_FILE_INFO_T *h5; NC_GRP_INFO_T *grp; NC_VAR_INFO_T *var = NULL; char norm_name[NC_MAX_NAME + 1]; int retval; LOG((2, "%s: ncid 0x%x varid %d", __func__, ncid, varid)); /* Find the file, group, and var info, and do lazy att read if * needed. */ if ((retval = nc4_hdf5_find_grp_var_att(ncid, varid, name, 0, 1, norm_name, &h5, &grp, &var, NULL))) return retval; /* If this is one of the reserved atts, use nc_get_att_special. */ if (!var) { const NC_reservedatt *ra = NC_findreserved(norm_name); if (ra && ra->flags & NAMEONLYFLAG) return nc4_get_att_special(h5, norm_name, NULL, NC_NAT, NULL, attnump, NULL); } return nc4_get_att_ptrs(h5, grp, var, norm_name, NULL, NC_NAT, NULL, attnump, NULL); } /** * @internal Given an attnum, find the att's name. * * @param ncid File and group ID. * @param varid Variable ID. * @param attnum The index number of the attribute. * @param name Pointer that gets name of attribute. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @author Ed Hartnett */ int NC4_HDF5_inq_attname(int ncid, int varid, int attnum, char *name) { NC_ATT_INFO_T *att; int retval; LOG((2, "%s: ncid 0x%x varid %d", __func__, ncid, varid)); /* Find the file, group, and var info, and do lazy att read if * needed. */ if ((retval = nc4_hdf5_find_grp_var_att(ncid, varid, NULL, attnum, 0, NULL, NULL, NULL, NULL, &att))) return retval; assert(att); /* Get the name. */ if (name) strcpy(name, att->hdr.name); return NC_NOERR; } /** * @internal Get an attribute. * * @param ncid File and group ID. * @param varid Variable ID. * @param name Name of attribute. * @param value Pointer that gets attribute data. * @param memtype The type the data should be converted to as it is * read. * * @return ::NC_NOERR No error. * @return ::NC_EBADID Bad ncid. * @author Ed Hartnett */ int NC4_HDF5_get_att(int ncid, int varid, const char *name, void *value, nc_type memtype) { NC_FILE_INFO_T *h5; NC_GRP_INFO_T *grp; NC_VAR_INFO_T *var = NULL; char norm_name[NC_MAX_NAME + 1]; int retval; LOG((2, "%s: ncid 0x%x varid %d", __func__, ncid, varid)); /* Find the file, group, and var info, and do lazy att read if * needed. */ if ((retval = nc4_hdf5_find_grp_var_att(ncid, varid, name, 0, 1, norm_name, &h5, &grp, &var, NULL))) return retval; /* If this is one of the reserved atts, use nc_get_att_special. */ if (!var) { const NC_reservedatt *ra = NC_findreserved(norm_name); if (ra && ra->flags & NAMEONLYFLAG) return nc4_get_att_special(h5, norm_name, NULL, NC_NAT, NULL, NULL, value); } return nc4_get_att_ptrs(h5, grp, var, norm_name, NULL, memtype, NULL, NULL, value); }