basic: add helper function to print </==/>

src/analyze/analyze-compare-versions.c

@@ -17,7 +17,7 @@ int verb_compare_versions(int argc, char *argv[], void *userdata) {
                 r = strverscmp_improved(ASSERT_PTR(argv[1]), ASSERT_PTR(argv[2]));
                 printf("%s %s %s\n",
                        isempty(argv[1]) ? "''" : argv[1],
-                       r < 0 ? "<" : r > 0 ? ">" : "==",
+                       comparison_operator(r),
                        isempty(argv[2]) ? "''" : argv[2]);
 
                 /* This matches the exit convention used by rpmdev-vercmp.

src/fundamental/string-util-fundamental.h

@@ -76,6 +76,10 @@ static inline const sd_char *yes_no(sd_bool b) {
         return b ? STR_C("yes") : STR_C("no");
 }
 
+static inline const sd_char* comparison_operator(int result) {
+        return result < 0 ? STR_C("<") : result > 0 ? STR_C(">") : STR_C("==");
+}
+
 sd_int strverscmp_improved(const sd_char *a, const sd_char *b);
 
 /* Like startswith(), but operates on arbitrary memory blocks */

src/test/test-string-util.c

@@ -835,7 +835,7 @@ static void test_strverscmp_improved_one(const char* a, const char *b, int expec
 
         log_info("'%s' %s '%s'%s",
                  strnull(a),
-                 r > 0 ? ">" : r < 0 ? "<" : "==",
+                 comparison_operator(r),
                  strnull(b),
                  r == expected ? "" : " !!!!!!!!!!!!!");
         assert_se(r == expected);