From 9b934aa767e8c177a0ac84cc808dec9ac49135ae Mon Sep 17 00:00:00 2001
From: Quincey Koziol <koziol@hdfgroup.org>
Date: Wed, 25 Aug 1999 17:01:41 -0500
Subject: [svn-r1599] Changed return type of H5Tenum_nameof and H5Tenum_valueof
 from hid_t to herr_t

---
 src/H5T.c       | 9 ++++++---
 src/H5Tpublic.h | 7 +++++--
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/H5T.c b/src/H5T.c
index 66ed3d1..cfa8187 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -1940,9 +1940,12 @@ H5Tset_size(hid_t type_id, size_t size)
     if (H5T_STATE_TRANSIENT!=dt->state) {
 	HRETURN_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only");
     }
-    if (size <= 0) {
+    if (size <= 0 && size!=H5T_VARIABLE) {
 	HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size must be positive");
     }
+    if (size == H5T_VARIABLE && dt->type!=H5T_STRING) {
+	HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "only strings may be variable length");
+    }
     if (H5T_ENUM==dt->type && dt->u.enumer.nmembs>0) {
 	HRETURN_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL,
 		      "operation not allowed after members are defined");
@@ -3801,7 +3804,7 @@ H5Tget_member_value(hid_t type, int membno, void *value/*out*/)
  *
  *-------------------------------------------------------------------------
  */
-hid_t
+herr_t
 H5Tenum_nameof(hid_t type, void *value, char *name/*out*/, size_t size)
 {
     H5T_t	*dt = NULL;
@@ -3851,7 +3854,7 @@ H5Tenum_nameof(hid_t type, void *value, char *name/*out*/, size_t size)
  *
  *-------------------------------------------------------------------------
  */
-hid_t
+herr_t
 H5Tenum_valueof(hid_t type, const char *name, void *value/*out*/)
 {
     H5T_t	*dt = NULL;
diff --git a/src/H5Tpublic.h b/src/H5Tpublic.h
index e595da6..d9284f1 100644
--- a/src/H5Tpublic.h
+++ b/src/H5Tpublic.h
@@ -156,6 +156,9 @@ typedef struct {
     void *p;    /* Pointer to VL data */
 } hvl_t;
 
+/* Variable Length String information */
+#define H5T_VARIABLE    ((size_t)(-1))  /* Indicate that a string is variable length (null-terminated in C, instead of fixed length) */
+
 /* All data type conversion functions are... */
 typedef herr_t (*H5T_conv_t) (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			      size_t nelmts, size_t stride, void *buf,
@@ -460,9 +463,9 @@ __DLL__ herr_t H5Tpack(hid_t type_id);
 /* Operations defined on enumeration data types */
 __DLL__ hid_t H5Tenum_create(hid_t base_id);
 __DLL__ herr_t H5Tenum_insert(hid_t type, const char *name, void *value);
-__DLL__ hid_t H5Tenum_nameof(hid_t type, void *value, char *name/*out*/,
+__DLL__ herr_t H5Tenum_nameof(hid_t type, void *value, char *name/*out*/,
 			     size_t size);
-__DLL__ hid_t H5Tenum_valueof(hid_t type, const char *name,
+__DLL__ herr_t H5Tenum_valueof(hid_t type, const char *name,
 			      void *value/*out*/);
 
 /* Operations defined on variable-length data types */
-- 
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