/* * Copyright (C) 1998 Spizella Software * All rights reserved. * * Programmer: Robb Matzke * Tuesday, January 13, 1998 * * Purpose: Data type conversions. */ #define H5T_PACKAGE /*suppress error about including H5Tpkg */ #include #include #include #include /* Conversion data for H5T_conv_struct() */ typedef struct H5T_conv_struct_t { intn *src2dst; /*mapping from src to dst memb ID */ hid_t *src_memb_id; /*source member type ID's */ hid_t *dst_memb_id; /*destination member type ID's */ H5T_conv_t *memb_conv; /*array of membr conversion functions*/ H5T_cdata_t **memb_cdata; /*array of member cdata pointers */ } H5T_conv_struct_t; /* Interface initialization */ static intn interface_initialize_g = FALSE; #define INTERFACE_INIT NULL /*------------------------------------------------------------------------- * Function: H5T_conv_noop * * Purpose: The no-op conversion. The library knows about this * conversion without it being registered. * * Return: Success: SUCCEED * * Failure: never fails * * Programmer: Robb Matzke * Wednesday, January 14, 1998 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5T_conv_noop(hid_t __unused__ src_id, hid_t __unused__ dst_id, H5T_cdata_t *cdata, size_t __unused__ nelmts, void __unused__ *buf, void __unused__ *background) { FUNC_ENTER(H5T_conv_noop, FAIL); switch (cdata->command) { case H5T_CONV_INIT: /* Nothing to initialize */ break; case H5T_CONV_CONV: /* Nothing to convert */ break; case H5T_CONV_FREE: /* Nothing to free */ break; default: HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unknown conversion command"); } FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5T_conv_order * * Purpose: Convert one type to another when byte order is the only * difference. * * Note: This is a soft conversion function. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * Tuesday, January 13, 1998 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5T_conv_order(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts, void *_buf, void __unused__ *background) { uint8 *buf = (uint8 *) _buf; uint8 tmp; H5T_t *src = NULL; H5T_t *dst = NULL; size_t i, j, md; FUNC_ENTER(H5T_conv_order, FAIL); switch (cdata->command) { case H5T_CONV_INIT: /* Capability query */ if (H5_DATATYPE != H5I_group(src_id) || NULL == (src = H5I_object(src_id)) || H5_DATATYPE != H5I_group(dst_id) || NULL == (dst = H5I_object(dst_id))) { HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } if (src->size != dst->size || 0 != src->u.atomic.offset || 0 != dst->u.atomic.offset || !((H5T_ORDER_BE == src->u.atomic.order && H5T_ORDER_LE == dst->u.atomic.order) || (H5T_ORDER_LE == src->u.atomic.order && H5T_ORDER_BE == dst->u.atomic.order))) { HRETURN_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "conversion not supported"); } switch (src->type) { case H5T_INTEGER: /* nothing to check */ break; case H5T_FLOAT: if (src->u.atomic.u.f.sign != dst->u.atomic.u.f.sign || src->u.atomic.u.f.epos != dst->u.atomic.u.f.epos || src->u.atomic.u.f.esize != dst->u.atomic.u.f.esize || src->u.atomic.u.f.ebias != dst->u.atomic.u.f.ebias || src->u.atomic.u.f.mpos != dst->u.atomic.u.f.mpos || src->u.atomic.u.f.msize != dst->u.atomic.u.f.msize || src->u.atomic.u.f.norm != dst->u.atomic.u.f.norm || src->u.atomic.u.f.pad != dst->u.atomic.u.f.pad) { HRETURN_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "conversion not supported"); } break; default: HRETURN_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "conversion not supported"); } break; case H5T_CONV_CONV: /* The conversion */ if (H5_DATATYPE != H5I_group(src_id) || NULL == (src = H5I_object(src_id)) || H5_DATATYPE != H5I_group(dst_id) || NULL == (dst = H5I_object(dst_id))) { HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } md = src->size / 2; for (i=0; isize) { for (j=0; jsize-(j+1)]; buf[src->size-(j+1)] = tmp; } } break; case H5T_CONV_FREE: /* Free private data */ break; default: HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unknown conversion command"); } FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5T_conv_struct_init * * Purpose: Initialize the `priv' field of `cdata' with conversion * information that is relatively constant. If `priv' is * already initialized then the member conversion functions * are recalculated. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * Monday, January 26, 1998 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5T_conv_struct_init (H5T_t *src, H5T_t *dst, H5T_cdata_t *cdata) { H5T_conv_struct_t *priv = (H5T_conv_struct_t*)(cdata->priv); intn i, j, *src2dst = NULL; H5T_t *type = NULL; hid_t tid; FUNC_ENTER (H5T_conv_struct_init, FAIL); if (!priv) { /* * Notice: the thing marked with `!' below really is `dst' and not * `src' because we're only interested in the members of the * source type that are also in the destination type. */ cdata->priv = priv = H5MM_xcalloc (1, sizeof(H5T_conv_struct_t)); priv->src2dst = H5MM_xmalloc (src->u.compnd.nmembs * sizeof(intn)); priv->src_memb_id = H5MM_xmalloc (/*!*/dst->u.compnd.nmembs * sizeof(hid_t)); priv->dst_memb_id = H5MM_xmalloc (dst->u.compnd.nmembs * sizeof(hid_t)); /* * Insure that members are sorted. */ H5T_sort_by_offset (src); H5T_sort_by_offset (dst); /* * Build a mapping from source member number to destination member * number. If some source member is not a destination member then that * mapping element will be negative. Also create atoms for each * source and destination member data type so we can look up the * member data type conversion functions later. */ for (i=0; iu.compnd.nmembs; i++) { priv->src2dst[i] = -1; for (j=0; ju.compnd.nmembs; j++) { if (!HDstrcmp (src->u.compnd.memb[i].name, dst->u.compnd.memb[j].name)) { priv->src2dst[i] = j; break; } } if (priv->src2dst[i]>=0) { type = H5T_copy (src->u.compnd.memb[i].type); tid = H5I_register (H5_DATATYPE, type); assert (tid>=0); priv->src_memb_id[priv->src2dst[i]] = tid; type = H5T_copy (dst->u.compnd.memb[priv->src2dst[i]].type); tid = H5I_register (H5_DATATYPE, type); assert (tid>=0); priv->dst_memb_id[priv->src2dst[i]] = tid; } } } /* * (Re)build the cache of member conversion functions and pointers to * their cdata entries. */ priv->memb_conv = H5MM_xfree (priv->memb_conv); priv->memb_cdata = H5MM_xfree (priv->memb_cdata); priv->memb_conv = H5MM_xmalloc (dst->u.compnd.nmembs * sizeof(H5T_conv_t)); priv->memb_cdata = H5MM_xcalloc (dst->u.compnd.nmembs, sizeof(H5T_cdata_t*)); src2dst = priv->src2dst; for (i=0; iu.compnd.nmembs; i++) { if (priv->src2dst[i]>=0) { H5T_conv_t tconv_func = H5Tfind (priv->src_memb_id[src2dst[i]], priv->dst_memb_id[src2dst[i]], priv->memb_cdata+src2dst[i]); if (!tconv_func) { H5MM_xfree (priv->src2dst); H5MM_xfree (priv->src_memb_id); H5MM_xfree (priv->dst_memb_id); H5MM_xfree (priv->memb_conv); cdata->priv = priv = H5MM_xfree (priv); HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unable to convert member data type"); } priv->memb_conv[src2dst[i]] = tconv_func; } } cdata->need_bkg = H5T_BKG_TEMP; cdata->recalc = FALSE; FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5T_conv_struct * * Purpose: Converts between compound data types. This is a soft * conversion function. The algorithm is basically: * * For I=1..NUM_MEMBERS do * If sizeof detination type <= sizeof source type then * Convert member to destination type; * Move member as far left as possible; * * For I=NUM_MEMBERS..1 do * If not destination type then * Convert member to destination type; * Move member to correct position in BACKGROUND * * Copy BACKGROUND to BUF * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * Thursday, January 22, 1998 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5T_conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts, void *_buf, void *_bkg) { uint8 *buf = (uint8 *)_buf; /*cast for pointer arithmetic */ uint8 *bkg = (uint8 *)_bkg; /*background pointer arithmetic */ H5T_t *src = NULL; /*source data type */ H5T_t *dst = NULL; /*destination data type */ intn *src2dst = NULL; /*maps src member to dst member */ H5T_member_t *src_memb = NULL; /*source struct member descript.*/ H5T_member_t *dst_memb = NULL; /*destination struct memb desc. */ size_t offset; /*byte offset wrt struct */ size_t src_delta, dst_delta; /*source & destination stride */ uintn elmtno; intn i; /*counters */ H5T_conv_struct_t *priv = (H5T_conv_struct_t *)(cdata->priv); FUNC_ENTER (H5T_conv_struct, FAIL); switch (cdata->command) { case H5T_CONV_INIT: /* * First, determine if this conversion function applies to the * conversion path SRC_ID-->DST_ID. If not, return failure; * otherwise initialize the `priv' field of `cdata' with information * that remains (almost) constant for this conversion path. */ if (H5_DATATYPE != H5I_group(src_id) || NULL == (src = H5I_object(src_id)) || H5_DATATYPE != H5I_group(dst_id) || NULL == (dst = H5I_object(dst_id))) { HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } assert (H5T_COMPOUND==src->type); assert (H5T_COMPOUND==dst->type); #ifndef LATER /* * Struct members must be scalar for now. */ for (i=0; iu.compnd.nmembs; i++) { if (src->u.compnd.memb[i].ndims>0) { HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "array members are not supported yet"); } } for (i=0; iu.compnd.nmembs; i++) { if (dst->u.compnd.memb[i].ndims>0) { HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "array members are not supported yet"); } } #endif if (H5T_conv_struct_init (src, dst, cdata)<0) { HRETURN_ERROR (H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data"); } break; case H5T_CONV_FREE: /* * Free the private conversion data. */ H5MM_xfree (priv->src2dst); H5MM_xfree (priv->src_memb_id); H5MM_xfree (priv->dst_memb_id); H5MM_xfree (priv->memb_conv); cdata->priv = priv = H5MM_xfree (priv); break; case H5T_CONV_CONV: /* * Conversion. */ if (H5_DATATYPE != H5I_group(src_id) || NULL == (src = H5I_object(src_id)) || H5_DATATYPE != H5I_group(dst_id) || NULL == (dst = H5I_object(dst_id))) { HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } assert (priv); assert (bkg && cdata->need_bkg>=H5T_BKG_TEMP); if (cdata->recalc && H5T_conv_struct_init (src, dst, cdata)<0) { HRETURN_ERROR (H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data"); } /* * Insure that members are sorted. */ H5T_sort_by_offset (src); H5T_sort_by_offset (dst); src2dst = priv->src2dst; /* * Direction of conversion. */ if (dst->size <= src->size) { src_delta = src->size; dst_delta = dst->size; } else { src_delta = -(src->size); dst_delta = -(dst->size); buf += (nelmts-1) * src->size; bkg += (nelmts-1) * dst->size; } for (elmtno=0; elmtnou.compnd.nmembs; i++) { if (src2dst[i]<0) continue; src_memb = src->u.compnd.memb + i; dst_memb = dst->u.compnd.memb + src2dst[i]; if (H5T_get_size (dst_memb->type) <= H5T_get_size (src_memb->type)) { H5T_conv_t tconv_func = priv->memb_conv[src2dst[i]]; H5T_cdata_t *memb_cdata = priv->memb_cdata[src2dst[i]]; memb_cdata->command = H5T_CONV_CONV; (tconv_func)(priv->src_memb_id[src2dst[i]], priv->dst_memb_id[src2dst[i]], memb_cdata, 1, buf + src_memb->offset, bkg + dst_memb->offset); HDmemmove (buf + offset, buf + src_memb->offset, H5T_get_size (dst_memb->type)); offset += H5T_get_size (dst_memb->type); } else { HDmemmove (buf + offset, buf + src_memb->offset, H5T_get_size (src_memb->type)); offset += H5T_get_size (src_memb->type); } } /* * For each source member which will be present in the * destination, convert the member to the destination type if it * is larger than the source type (that is, has not been converted * yet). Then copy the member to the destination offset in the * background buffer. */ for (i=src->u.compnd.nmembs-1; i>=0; --i) { if (src2dst[i]<0) continue; src_memb = src->u.compnd.memb + i; dst_memb = dst->u.compnd.memb + src2dst[i]; offset -= H5T_get_size (dst_memb->type); if (H5T_get_size (dst_memb->type) > H5T_get_size (src_memb->type)) { H5T_conv_t tconv_func = priv->memb_conv[src2dst[i]]; H5T_cdata_t *memb_cdata = priv->memb_cdata[src2dst[i]]; memb_cdata->command = H5T_CONV_CONV; (tconv_func)(priv->src_memb_id[src2dst[i]], priv->dst_memb_id[src2dst[i]], memb_cdata, 1, buf + offset, bkg + dst_memb->offset); } HDmemmove (bkg+dst_memb->offset, buf+offset, H5T_get_size (dst_memb->type)); } assert (0==offset); /* * Update buf and background. */ buf += src_delta; bkg += dst_delta; } /* * Copy the background buffer back into the in-place conversion * buffer. */ HDmemcpy (_buf, _bkg, nelmts*dst->size); break; default: /* Some other command we don't know about yet.*/ HRETURN_ERROR (H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unknown conversion command"); } FUNC_LEAVE (SUCCEED); }