Added testcase that tests %a & %A format specifiers in vfscanf

issue found by running SuperTest by Solid Sands

Signed-off-by: Ahmed Shehab <[email protected]>

test/meson.build

@@ -544,6 +544,7 @@ foreach target : targets
                       'test-ungetc-ftell',
                       'test-fgetc',
                       'test-fgets-eof',
+                      'test-vfscanf-percentaA',
                      ]
     endif
   endif

test/test-vfscanf-percent-a.c

@@ -0,0 +1,104 @@
+/*
+* SPDX-License-Identifier: BSD-3-Clause
+* 
+* Copyright © 2024, Synopsys Inc.
+* Copyright © 2024, Solid Sands B.V.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+* 1. Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above
+*    copyright notice, this list of conditions and the following
+*    disclaimer in the documentation and/or other materials provided
+*    with the distribution.
+*
+* 3. Neither the name of the copyright holder nor the names of its
+*    contributors may be used to endorse or promote products derived
+*    from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+* OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <stdio.h>
+#include <math.h>
+
+#ifndef TEST_FILE_NAME
+#define TEST_FILE_NAME "VFSCANFPERCENTaA.TXT"
+#endif
+
+const char* input_string = "0x1.1p+3 0x1.6p+2 ";
+
+int compare_floats(float a, float b, float tolerance) {
+    return fabs(a - b) < tolerance;
+}
+
+int main() {
+    int res = -1;
+    int ret = 0;
+    float var = 0.0F;
+    float tolerance = 1e-6;
+    const float ref_out = 5.5F;
+
+    FILE *file = NULL;
+
+    file = fopen(TEST_FILE_NAME, "w");
+    if( file == NULL )
+        return 0;
+
+    res = fprintf(file, "%s", input_string);
+
+    fclose(file);
+
+    {
+        file = fopen(TEST_FILE_NAME, "r");
+        if( file == NULL )
+            return 0;
+
+        res = fscanf(file, "%a %a ", &var, &var);
+        ret = compare_floats(var, ref_out, tolerance);
+
+        if ((res != 2) || (ret == 0)) {
+            printf("Test Case 1 Failed: Failed to read the input string correctly using %%a\n");
+        }
+        else {
+            printf("Test Case 1 Passed: %%a is handled correctly\n");
+        } 
+
+        fclose(file);   
+    }
+
+    {   
+        file = fopen(TEST_FILE_NAME, "r" );
+        if( file == NULL )
+            return 0;
+
+        res = fscanf( file, "%A %A ", &var, &var);
+        ret = compare_floats(var, ref_out, tolerance);
+
+        if ((res != 2) || (ret == 0)) {
+            printf("Test Case 2 Failed: Failed to read the input string correctly using %%A\n");
+        } 
+        else {
+            printf("Test Case 2 Passed: %%A is handled correctly\n");
+        }  
+
+        fclose(file);
+    }
+
+    return 0;
+}