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-rw-r--r--src/H5Oattr.c76
1 files changed, 57 insertions, 19 deletions
diff --git a/src/H5Oattr.c b/src/H5Oattr.c
index 406c486..5d05a7c 100644
--- a/src/H5Oattr.c
+++ b/src/H5Oattr.c
@@ -62,10 +62,13 @@ const H5O_msg_class_t H5O_MSG_ATTR[1] = {{
}};
/* This is the initial version, which does not have support for shared datatypes */
-#define H5O_ATTR_VERSION 1
+#define H5O_ATTR_VERSION_1 1
/* This version allows support for shared datatypes */
-#define H5O_ATTR_VERSION_NEW 2
+#define H5O_ATTR_VERSION_2 2
+
+/* Add support for different character encodings of attribute names */
+#define H5O_ATTR_VERSION_3 3
/* Flags for attribute flag encoding */
#define H5O_ATTR_FLAG_TYPE_SHARED 0x01
@@ -104,6 +107,9 @@ H5FL_EXTERN(H5S_extent_t);
* Raymond Lu, 8 April 2004
* Changed Dataspace operation on H5S_simple_t to H5S_extent_t.
*
+ * James Laird, 15 November 2005
+ * Added character encoding (version 3)
+ *
--------------------------------------------------------------------------*/
static void *
H5O_attr_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p)
@@ -126,11 +132,11 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p)
/* Version number */
version = *p++;
- if (version!=H5O_ATTR_VERSION && version!=H5O_ATTR_VERSION_NEW)
+ if (version<H5O_ATTR_VERSION_1 || version>H5O_ATTR_VERSION_3)
HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for attribute message");
/* Get the flags byte if we have a later version of the attribute */
- if(version>H5O_ATTR_VERSION)
+ if(version>H5O_ATTR_VERSION_1)
flags = *p++;
else
p++; /* Byte is unused when version<2 */
@@ -143,10 +149,17 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p)
UINT16DECODE(p, attr->dt_size);
UINT16DECODE(p, attr->ds_size);
+ /*
+ * Decode the character encoding for the name for versions 3 or later,
+ * as well as some reserved bytes.
+ */
+ if(version >= H5O_ATTR_VERSION_3)
+ attr->encoding = *p++;
+
/* Decode and store the name */
if (NULL==(attr->name=H5MM_strdup((const char *)p)))
HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
- if(version < H5O_ATTR_VERSION_NEW)
+ if(version < H5O_ATTR_VERSION_2)
p += H5O_ALIGN(name_len); /* advance the memory pointer */
else
p += name_len; /* advance the memory pointer */
@@ -170,7 +183,7 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p)
if((attr->dt=(H5O_MSG_DTYPE->decode)(f,dxpl_id,p))==NULL)
HGOTO_ERROR(H5E_ATTR, H5E_CANTDECODE, NULL, "can't decode attribute datatype");
} /* end else */
- if(version < H5O_ATTR_VERSION_NEW)
+ if(version < H5O_ATTR_VERSION_2)
p += H5O_ALIGN(attr->dt_size);
else
p += attr->dt_size;
@@ -192,7 +205,7 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p)
if(H5S_select_all(attr->ds,0)<0)
HGOTO_ERROR (H5E_DATASPACE, H5E_CANTSET, NULL, "unable to set all selection");
- if(version < H5O_ATTR_VERSION_NEW)
+ if(version < H5O_ATTR_VERSION_2)
p += H5O_ALIGN(attr->ds_size);
else
p += attr->ds_size;
@@ -245,6 +258,9 @@ done:
* For data space, changed the operation on H5S_simple_t to
* H5S_extent_t
*
+ * James Laird, 15 November 2005
+ * Added character encoding (version 3)
+ *
--------------------------------------------------------------------------*/
static herr_t
H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
@@ -269,16 +285,18 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
type_shared = FALSE;
/* Check which version to write out */
- if(type_shared)
- version = H5O_ATTR_VERSION_NEW; /* Write out new version if shared datatype */
+ if(attr->encoding != H5T_CSET_ASCII)
+ version = H5O_ATTR_VERSION_3; /* Write version which includes the character encoding */
+ else if(type_shared)
+ version = H5O_ATTR_VERSION_2; /* Write out version with shared datatype */
else
- version = H5O_ATTR_VERSION;
+ version = H5O_ATTR_VERSION_1; /* Write out basic version */
/* Encode Version */
*p++ = version;
/* Set attribute flags if version >1 */
- if(version>H5O_ATTR_VERSION)
+ if(version>H5O_ATTR_VERSION_1)
*p++ = (type_shared ? H5O_ATTR_FLAG_TYPE_SHARED : 0 ); /* Set flags for attribute */
else
*p++ = 0; /* Reserved, for version <2 */
@@ -294,12 +312,19 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
UINT16ENCODE(p, attr->ds_size);
/*
+ * Encode the character encoding used for the attribute's name
+ * Also add several "reserved" fields to pad to 16 bytes.
+ */
+ if(version>=H5O_ATTR_VERSION_3)
+ *p++=attr->encoding;
+
+ /*
* Write the name including null terminator padded to the correct number
* of bytes.
*/
HDmemcpy(p, attr->name, name_len);
HDmemset(p+name_len, 0, H5O_ALIGN(name_len)-name_len);
- if(version < H5O_ATTR_VERSION_NEW)
+ if(version < H5O_ATTR_VERSION_2)
p += H5O_ALIGN(name_len);
else
p += name_len;
@@ -324,7 +349,7 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
if((H5O_MSG_DTYPE->encode)(f,p,attr->dt)<0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "can't encode attribute datatype");
} /* end else */
- if(version < H5O_ATTR_VERSION_NEW) {
+ if(version < H5O_ATTR_VERSION_2) {
HDmemset(p+attr->dt_size, 0, H5O_ALIGN(attr->dt_size)-attr->dt_size);
p += H5O_ALIGN(attr->dt_size);
} /* end if */
@@ -334,7 +359,7 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
/* encode the attribute dataspace */
if((H5O_MSG_SDSPACE->encode)(f,p,&(attr->ds->extent))<0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "can't encode attribute dataspace");
- if(version < H5O_ATTR_VERSION_NEW) {
+ if(version < H5O_ATTR_VERSION_2) {
HDmemset(p+attr->ds_size, 0, H5O_ALIGN(attr->ds_size)-attr->ds_size);
p += H5O_ALIGN(attr->ds_size);
} /* end if */
@@ -429,12 +454,14 @@ H5O_attr_size(const H5F_t UNUSED *f, const void *_mesg)
type_shared = FALSE;
/* Check which version to write out */
- if(type_shared)
- version = H5O_ATTR_VERSION_NEW; /* Write out new version if shared datatype */
+ if(attr->encoding != H5T_CSET_ASCII)
+ version = H5O_ATTR_VERSION_3; /* Write version which includes the character encoding */
+ else if(type_shared)
+ version = H5O_ATTR_VERSION_2; /* Write out version with shared datatype */
else
- version = H5O_ATTR_VERSION;
+ version = H5O_ATTR_VERSION_1; /* Write out basic version */
- if(version < H5O_ATTR_VERSION_NEW)
+ if(version == H5O_ATTR_VERSION_1)
ret_value = 1 + /*version */
1 + /*reserved */
2 + /*name size inc. null */
@@ -444,12 +471,23 @@ H5O_attr_size(const H5F_t UNUSED *f, const void *_mesg)
H5O_ALIGN(attr->dt_size) + /*data type */
H5O_ALIGN(attr->ds_size) + /*data space */
attr->data_size; /*the data itself */
- else
+ else if(version == H5O_ATTR_VERSION_2)
+ ret_value = 1 + /*version */
+ 1 + /*flags */
+ 2 + /*name size inc. null */
+ 2 + /*type size */
+ 2 + /*space size */
+ name_len + /*attribute name */
+ attr->dt_size + /*data type */
+ attr->ds_size + /*data space */
+ attr->data_size; /*the data itself */
+ else if(version == H5O_ATTR_VERSION_3)
ret_value = 1 + /*version */
1 + /*flags */
2 + /*name size inc. null */
2 + /*type size */
2 + /*space size */
+ 1 + /*character encoding */
name_len + /*attribute name */
attr->dt_size + /*data type */
attr->ds_size + /*data space */
generated by cgit v0.12 at 2024-11-02 19:13:11 (GMT)