stdio-common: Add a few double formatting tests [BZ #27245]

Checked on x86_64-linux-gnu.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

diff --git a/stdio-common/tfformat.c b/stdio-common/tfformat.c
index 5cb366dd48eef16ab2524fb1f6128874a9c53e67..4eb47f0c2b94080ae5559a1bb6f9636287546290 100644 (file)
--- a/stdio-common/tfformat.c
+++ b/stdio-common/tfformat.c
@@ -1,3 +1,4 @@
+#include <math.h>
 #include <stdio.h>
 
 /* Tests taken from Cygnus C library. */
@@ -4009,6 +4010,10 @@ sprint_double_type sprint_doubles[] =
   {__LINE__, 11.25,                    "11.2", "%.1f"},
   {__LINE__, 1.75,                     "1.8", "%.1f"},
   {__LINE__, 11.75,                    "11.8", "%.1f"},
+  {__LINE__, -1.25,                    "-1.2", "%.1f"},
+  {__LINE__, -11.25,                   "-11.2", "%.1f"},
+  {__LINE__, -1.75,                    "-1.8", "%.1f"},
+  {__LINE__, -11.75,                   "-11.8", "%.1f"},
   {__LINE__, 16,                       "0x1.0p+4", "%.1a"},
   {__LINE__, 16,                       "0x1.00000000000000000000p+4", "%.20a"},
   {__LINE__, 4444.88888888,            "4445", "%2.F"},
@@ -4039,6 +4044,29 @@ sprint_double_type sprint_doubles[] =
   {__LINE__, 912.98,                   "913", "%.4g"},
   {__LINE__, 50.999999,                        "51", "%.5g"},
 
+  {__LINE__, 0.0,                      "0000.00000", "%010.5f"},
+  {__LINE__, 0.0,                      " 000.00000", "% 010.5f"},
+  {__LINE__, -0.0,                     "-000.00000", "% 010.5f"},
+
+  {__LINE__, NAN,                      "nan", "%f"},
+  {__LINE__, NAN,                      "+nan", "%+f"},
+  {__LINE__, NAN,                      "       nan", "%010.2f"},
+  {__LINE__, NAN,                      "      +nan", "%+010.2f"},
+  {__LINE__, -NAN,                     "-nan", "%f"},
+  {__LINE__, -NAN,                     "-nan", "%+f"},
+  {__LINE__, -NAN,                     "      -nan", "%010.2f"},
+  {__LINE__, -NAN,                     "      -nan", "%+010.2f"},
+  {__LINE__, NAN,                      "NAN", "%F"},
+  {__LINE__, INFINITY,                 "inf", "%f"},
+  {__LINE__, INFINITY,                 "+inf", "%+f"},
+  {__LINE__, INFINITY,                 "       inf", "%010.2f"},
+  {__LINE__, INFINITY,                 "      +inf", "%+010.2f"},
+  {__LINE__, -INFINITY,                        "-inf", "%f"},
+  {__LINE__, -INFINITY,                        "-inf", "%+f"},
+  {__LINE__, -INFINITY,                        "      -inf", "%010.2f"},
+  {__LINE__, -INFINITY,                        "      -inf", "%+010.2f"},
+  {__LINE__, INFINITY,                 "INF", "%F"},
+
   {0 }
 
 };
@@ -4090,7 +4118,7 @@ int main(int argc, char *argv[])
 
       sprintf (buffer, "%.999g", dptr->value);
       sscanf (buffer, "%lg", &d);
-      if (dptr->value != d)
+      if (dptr->value != d && !isnan(d))
        {
          errcount++;
          printf ("Error in line %d.  String is \"%s\", value is %g.\n",