Merge pull request #172 from pacheco017/UnityPrintFloat-overflow-fixes

UnityPrintFloat overflow fixes. (Thanks pacheco017!)

src/unity.c

@@ -280,10 +280,19 @@ void UnityPrintMask(const _U_UINT mask, const _U_UINT number)
 //-----------------------------------------------
 #ifdef UNITY_FLOAT_VERBOSE
 #include <stdio.h>
+
+#ifndef UNITY_VERBOSE_NUMBER_MAX_LENGTH
+# ifdef UNITY_DOUBLE_VERBOSE
+#  define UNITY_VERBOSE_NUMBER_MAX_LENGTH 317
+# else
+#  define UNITY_VERBOSE_NUMBER_MAX_LENGTH 47
+# endif
+#endif
+
 void UnityPrintFloat(_UF number)
 {
-    char TempBuffer[32];
-    sprintf(TempBuffer, "%.6f", number);
+    char TempBuffer[UNITY_VERBOSE_NUMBER_MAX_LENGTH + 1];
+    snprintf(TempBuffer, sizeof(TempBuffer), "%.6f", number);
     UnityPrint(TempBuffer);
 }
 #endif

src/unity.h

@@ -44,6 +44,7 @@ void tearDown(void);
 //     - define UNITY_DOUBLE_PRECISION to specify the precision to use when doing TEST_ASSERT_EQUAL_DOUBLE
 //     - define UNITY_DOUBLE_TYPE to specify something other than double
 //     - define UNITY_DOUBLE_VERBOSE to print floating point values in errors (uses sprintf)
+//     - define UNITY_VERBOSE_NUMBER_MAX_LENGTH to change maximum length of printed numbers (used by sprintf)
 
 // Output
 //     - by default, Unity prints to standard out with putchar.  define UNITY_OUTPUT_CHAR(a) with a different function if desired