Merge pull request #2304 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:isnan_fixes to develop

* commit '8b4d774eb9bb95cb3c59f033b43ed9fba340a54a':
  Replaced my_isnan with C99 isnan in h5diff.

2 files changed, 45 insertions, 116 deletions

diff --git a/src/H5private.h b/src/H5private.h
index fbea9b8..e4d2e08 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -1010,6 +1010,9 @@ typedef off_t               h5_stat_size_t;
 #ifndef HDislower
     #define HDislower(C)    islower((int)(C)) /*cast for solaris warning*/
 #endif /* HDislower */
+#ifndef HDisnan
+    #define HDisnan(X)      isnan(X)
+#endif /* HDisnan */
 #ifndef HDisprint
     #define HDisprint(C)    isprint((int)(C)) /*cast for solaris warning*/
 #endif /* HDisprint */
diff --git a/tools/lib/h5diff_array.c b/tools/lib/h5diff_array.c
index 3127870..6450745 100644
--- a/tools/lib/h5diff_array.c
+++ b/tools/lib/h5diff_array.c
@@ -243,7 +243,6 @@ typedef enum dtype_t {
 } dtype_t;
 #endif
 
-static hbool_t my_isnan(dtype_t type, void *val);
 
 /*-------------------------------------------------------------------------
  * XCAO, 11/10/2010
@@ -1759,8 +1758,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                    isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                    isnan1 = HDisnan(temp1_float);
+                    isnan2 = HDisnan(temp2_float);
                 }
 
                 /* both not NaN, do the comparison */
@@ -1794,8 +1793,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                    isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                    isnan1 = HDisnan(temp1_float);
+                    isnan2 = HDisnan(temp2_float);
                 }
 
                 /* both not NaN, do the comparison */
@@ -1840,8 +1839,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                    isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                    isnan1 = HDisnan(temp1_float);
+                    isnan2 = HDisnan(temp2_float);
                 }
 
                 /* both not NaN, do the comparison */
@@ -1917,8 +1916,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                    isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -1952,8 +1951,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                    isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -1997,8 +1996,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                 *-------------------------------------------------------------------------
                 */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                    isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -2078,8 +2077,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_LDOUBLE,&temp1_double);
-                    isnan2 = my_isnan(FLT_LDOUBLE,&temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -2113,8 +2112,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_LDOUBLE, &temp1_double);
-                    isnan2 = my_isnan(FLT_LDOUBLE, &temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -2158,8 +2157,8 @@ static hsize_t diff_datum(void *_mem1, void *_mem2, hid_t m_type, hsize_t index,
                  *-------------------------------------------------------------------------
                  */
                 if (opts->do_nans) {
-                    isnan1 = my_isnan(FLT_LDOUBLE, &temp1_double);
-                    isnan2 = my_isnan(FLT_LDOUBLE, &temp2_double);
+                    isnan1 = HDisnan(temp1_double);
+                    isnan2 = HDisnan(temp2_double);
                 }
 
                 /* both not NaN, do the comparison */
@@ -2633,8 +2632,8 @@ static hsize_t diff_float(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                isnan1 = HDisnan(temp1_float);
+                isnan2 = HDisnan(temp2_float);
             }
 
             /* both not NaN, do the comparison */
@@ -2678,8 +2677,8 @@ static hsize_t diff_float(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                isnan1 = HDisnan(temp1_float);
+                isnan2 = HDisnan(temp2_float);
             }
             /* both not NaN, do the comparison */
             if ((!isnan1 && !isnan2)) {
@@ -2733,8 +2732,8 @@ static hsize_t diff_float(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_FLOAT, &temp1_float);
-                isnan2 = my_isnan(FLT_FLOAT, &temp2_float);
+                isnan1 = HDisnan(temp1_float);
+                isnan2 = HDisnan(temp2_float);
             }
 
             /* both not NaN, do the comparison */
@@ -2843,8 +2842,8 @@ static hsize_t diff_double(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
 
             /* both not NaN, do the comparison */
@@ -2889,8 +2888,8 @@ static hsize_t diff_double(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
             /* both not NaN, do the comparison */
             if (!isnan1 && !isnan2) {
@@ -2945,8 +2944,8 @@ static hsize_t diff_double(unsigned char *mem1, unsigned char *mem2,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_DOUBLE, &temp1_double);
-                isnan2 = my_isnan(FLT_DOUBLE, &temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
 
             /* both not NaN, do the comparison */
@@ -3062,8 +3061,8 @@ static hsize_t diff_ldouble(unsigned char *mem1,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_LDOUBLE,&temp1_double);
-                isnan2 = my_isnan(FLT_LDOUBLE,&temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
 
             /* both not NaN, do the comparison */
@@ -3108,8 +3107,8 @@ static hsize_t diff_ldouble(unsigned char *mem1,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_LDOUBLE, &temp1_double);
-                isnan2 = my_isnan(FLT_LDOUBLE, &temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
             /* both not NaN, do the comparison */
             if (!isnan1 && !isnan2) {
@@ -3162,8 +3161,8 @@ static hsize_t diff_ldouble(unsigned char *mem1,
              *-------------------------------------------------------------------------
              */
             if (opts->do_nans) {
-                isnan1 = my_isnan(FLT_LDOUBLE, &temp1_double);
-                isnan2 = my_isnan(FLT_LDOUBLE, &temp2_double);
+                isnan1 = HDisnan(temp1_double);
+                isnan2 = HDisnan(temp2_double);
             }
 
             /* both not NaN, do the comparison */
@@ -4541,8 +4540,8 @@ static hbool_t equal_double(double value, double expected, diff_opt_t *opts) {
         * detect NaNs
         *-------------------------------------------------------------------------
         */
-        hbool_t isnan1 = my_isnan(FLT_DOUBLE, &value);
-        hbool_t isnan2 = my_isnan(FLT_DOUBLE, &expected);
+        hbool_t isnan1 = HDisnan(value);
+        hbool_t isnan2 = HDisnan(expected);
 
         /*-------------------------------------------------------------------------
         * we consider NaN == NaN to be true
@@ -4589,8 +4588,8 @@ hbool_t equal_ldouble(long double value, long double expected, diff_opt_t *opts)
          * detect NaNs
          *-------------------------------------------------------------------------
          */
-        hbool_t isnan1 = my_isnan(FLT_LDOUBLE, &value);
-        hbool_t isnan2 = my_isnan(FLT_LDOUBLE, &expected);
+        hbool_t isnan1 = HDisnan(value);
+        hbool_t isnan2 = HDisnan(expected);
 
         /*-------------------------------------------------------------------------
          * we consider NaN == NaN to be true
@@ -4635,8 +4634,8 @@ static hbool_t equal_float(float value, float expected, diff_opt_t *opts) {
         * detect NaNs
         *-------------------------------------------------------------------------
         */
-        hbool_t isnan1 = my_isnan(FLT_FLOAT, &value);
-        hbool_t isnan2 = my_isnan(FLT_FLOAT, &expected);
+        hbool_t isnan1 = HDisnan(value);
+        hbool_t isnan2 = HDisnan(expected);
 
         /*-------------------------------------------------------------------------
          * we consider NaN == NaN to be true
@@ -4667,79 +4666,6 @@ static hbool_t equal_float(float value, float expected, diff_opt_t *opts) {
     return FALSE;
 }
 
-/*-------------------------------------------------------------------------
- * Function:  my_isnan
- *
- * Purpose:   Determines whether VAL points to NaN.
- *
- * Return:    TRUE or FALSE
- *-------------------------------------------------------------------------
- */
-static hbool_t my_isnan(dtype_t type, void *val) {
-    hbool_t retval = FALSE;
-    char s[256];
-
-    if (FLT_FLOAT == type) {
-        float x;
-
-        HDmemcpy(&x, val, sizeof(float));
-        retval = (x != x);
-    }
-    else if (FLT_DOUBLE == type) {
-        double x;
-
-        HDmemcpy(&x, val, sizeof(double));
-        retval = (x != x);
-    }
-#if H5_SIZEOF_LONG_DOUBLE != H5_SIZEOF_DOUBLE && H5_SIZEOF_LONG_DOUBLE != 0
-    else if (FLT_LDOUBLE == type) {
-        long double x;
-
-        HDmemcpy(&x, val, sizeof(long double));
-        retval = (x!=x);
-    }
-#endif
-    else
-        return FALSE;
-
-    /*
-    * Sometimes NaN==NaN (e.g., DEC Alpha) so we try to print it and see if
-    * the result contains a NaN string.
-    */
-    if (!retval) {
-        if (FLT_FLOAT == type) {
-            float x;
-
-            HDmemcpy(&x, val, sizeof(float));
-            HDsnprintf(s, sizeof(s), "%g", (double) x);
-        }
-        else if (FLT_DOUBLE == type) {
-            double x;
-
-            HDmemcpy(&x, val, sizeof(double));
-            HDsnprintf(s, sizeof(s), "%g", x);
-        }
-#if H5_SIZEOF_LONG_DOUBLE != H5_SIZEOF_DOUBLE && H5_SIZEOF_LONG_DOUBLE != 0
-        else if (FLT_LDOUBLE == type) {
-            long double x;
-
-            HDmemcpy(&x, val, sizeof(long double));
-            HDsnprintf(s, sizeof(s), "%Lg", x);
-        }
-#endif
-        else
-            return FALSE;
-
-        if (HDstrstr(s, "NaN") ||
-                HDstrstr(s, "NAN") ||
-                HDstrstr(s, "nan") ||
-                HDstrstr(s, "-1.#IND")) {
-            retval = TRUE;
-        }
-    }
-
-    return retval;
-}
 
 /*-------------------------------------------------------------------------
  *