C++: Add formatAttribute test.

Author: geoffw0

cpp/ql/test/library-tests/printf/formatAttribute/AttributeFormattingFunction.cpp

@@ -0,0 +1,6 @@
+
+typedef void *va_list;
+
+int myPrintf(const char *format, ...) __attribute__((format(printf, 1, 2)));
+int mySprintf(char *buffer, const char *format, ...) __attribute__((format(__printf__, 2, 3)));
+int myVprintf(const char *format, va_list arg) __attribute__((format(printf, 1, 0)));

cpp/ql/test/library-tests/printf/formatAttribute/AttributeFormattingFunction.expected

@@ -0,0 +1,2 @@
+| AttributeFormattingFunction.cpp:4:5:4:12 | myPrintf | 0 | char | wchar_t | wchar_t |
+| AttributeFormattingFunction.cpp:5:5:5:13 | mySprintf | 1 | char | wchar_t | wchar_t |

cpp/ql/test/library-tests/printf/formatAttribute/AttributeFormattingFunction.ql

@@ -0,0 +1,10 @@
+import cpp
+
+from AttributeFormattingFunction f
+select
+  f,
+  f.getFormatParameterIndex(),
+  concat(f.getDefaultCharType().toString(), ", "),
+  concat(f.getWideCharType().toString(), ", "),
+  concat(f.getNonDefaultCharType().toString(), ", ")
+

cpp/ql/test/library-tests/printf/formatAttribute/FormatAttribute.expected

@@ -0,0 +1,3 @@
+| AttributeFormattingFunction.cpp:4:54:4:59 | format | printf | 0 | 1 |
+| AttributeFormattingFunction.cpp:5:69:5:74 | format | __printf__ | 1 | 2 |
+| AttributeFormattingFunction.cpp:6:63:6:68 | format | printf | 0 |  |

cpp/ql/test/library-tests/printf/formatAttribute/FormatAttribute.ql

@@ -0,0 +1,8 @@
+import cpp
+
+from FormatAttribute fa
+select
+  fa,
+  fa.getArchetype(),
+  concat(fa.getFormatIndex().toString(), ", "),
+  concat(fa.getFirstFormatArgIndex().toString(), ", ")