Add better --help text to the test programs.

[cdecl99.git] / test / test.h

diff --git a/test/test.h b/test/test.h
index b8f7ee39273ddaca8ca72abdd7efb8c1856f47a2..dbf3f82e11170ff7e72fd85c3881b0fdf64a461d 100644 (file)
--- a/test/test.h
+++ b/test/test.h
@@ -1,8 +1,80 @@
+/*
+ * Copyright © 2012, 2020 Nick Bowler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #ifndef CDECL_TEST_H_
 #define CDECL_TEST_H_
 
 #include <stddef.h>
 #include <stdbool.h>
+#include <limits.h>
+#include <assert.h>
+#include <getopt.h>
+
+#ifndef _
+#  define _(x) (x)
+#endif
+
+static inline int
+print_option_start(const struct option *opt, const char *argname)
+{
+       int w;
+
+       if (!argname)
+               argname = _("ARG");
+
+       if (opt->val >= CHAR_MIN && opt->val <= CHAR_MAX) {
+               switch (opt->has_arg) {
+               case 0:
+                       w = printf(_("  -%c, --%s"), opt->val, opt->name);
+                       break;
+               case 1:
+                       w = printf(_("  -%c, --%s=%s"),
+                                  opt->val, opt->name, argname);
+                       break;
+               case 2:
+                       w = printf(_("  -%c, --%s[=%s]"),
+                                  opt->val, opt->name, argname);
+                       break;
+               default:
+                       assert(0);
+               }
+       } else {
+               switch (opt->has_arg) {
+               case 0:
+                       w = printf(_("  --%s"), opt->name);
+                       break;
+               case 1:
+                       w = printf(_("  --%s=%s"), opt->name, argname);
+                       break;
+               case 2:
+                       w = printf(_("  --%s[=%s]"), opt->name, argname);
+                       break;
+               default:
+                       assert(0);
+               }
+       }
+
+       if (w > 18) {
+               putchar('\n');
+               w = 0;
+       }
+
+       return w;
+}
 
 struct cdecl_declspec;
 struct cdecl;