diff options
| -rw-r--r-- | src/H5Tconv.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/H5Tconv.c b/src/H5Tconv.c new file mode 100644 index 0000000..8fcfe02 --- /dev/null +++ b/src/H5Tconv.c @@ -0,0 +1,140 @@ +/* + * Copyright (C) 1998 Spizella Software + * All rights reserved. + * + * Programmer: Robb Matzke <robb@arborea.spizella.com> + * Tuesday, January 13, 1998 + * + * Purpose: Data type conversions. + */ +#define H5T_PACKAGE /*suppress error about including H5Tpkg */ + +#include <H5Eprivate.h> +#include <H5Tpkg.h> + +/* 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 src_id, hid_t dst_id, size_t nelmts, + void *buf, const void *background) +{ + FUNC_ENTER (H5T_conv_noop, FAIL); + 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, size_t nelmts, + void *_buf, const void *background) +{ + uint8 *buf = (uint8*)_buf; + uint8 tmp; + H5T_t *src = NULL; + H5T_t *dst = NULL; + intn i, j, md; + + FUNC_ENTER (H5T_conv_order, FAIL); + + /* Check args */ + if (H5_DATATYPE!=H5Aatom_group (src_id) || + NULL==(src=H5Aatom_object (src_id)) || + H5_DATATYPE!=H5Aatom_group (dst_id) || + NULL==(dst=H5Aatom_object (dst_id))) { + HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); + } + if (background) { + HRETURN_ERROR (H5E_ARGS, H5E_UNSUPPORTED, FAIL, + "background values not supported in this conv path"); + } + + if (!buf) { + /* Capability query */ + 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"); + } + HRETURN (SUCCEED); + } + + + /* The conversion */ + md = src->size / 2; + for (i=0; i<nelmts; i++, buf+=src->size) { + for (j=0; j<md; j++) { + tmp = buf[j]; + buf[j] = buf[src->size-(j+1)]; + buf[src->size-(j+1)] = tmp; + } + } + + FUNC_LEAVE (SUCCEED); +} |