(EXIT_FAILURE): Define.

[gnulib.git] / lib / argmatch.c

diff --git a/lib/argmatch.c b/lib/argmatch.c
index efe22cd..6ae76ac 100644 (file)
--- a/lib/argmatch.c
+++ b/lib/argmatch.c
@@ -36,10 +36,6 @@
 # define _(Text) Text
 #endif
 
-#ifndef EXIT_BADARG
-# define EXIT_BADARG 1
-#endif
-
 #include "quotearg.h"
 
 /* When reporting a failing argument, make sure to show invisible
@@ -47,11 +43,32 @@
    ARGMATCH_QUOTING_STYLE. literal_quoting_style is not good.  */
 
 #ifndef ARGMATCH_QUOTING_STYLE
-# define ARGMATCH_QUOTING_STYLE c_quoting_style
+# define ARGMATCH_QUOTING_STYLE escape_quoting_style
 #endif
 
 extern char *program_name;
 
+/* The following test is to work around the gross typo in
+   systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
+   is defined to 0, not 1.  */
+#if !EXIT_FAILURE
+# undef EXIT_FAILURE
+# define EXIT_FAILURE 1
+#endif
+
+/* Non failing version of argmatch call this function after failing. */
+#ifndef ARGMATCH_DIE
+# define ARGMATCH_DIE exit (EXIT_FAILURE)
+#endif
+
+static void
+__argmatch_die (void)
+{
+  ARGMATCH_DIE;
+}
+
+argmatch_exit_fn argmatch_exit_failure = __argmatch_exit_failure;
+\f
 /* If ARG is an unambiguous match for an element of the
    null-terminated array ARGLIST, return the index in ARGLIST
    of the matched element, else -1 if it does not match any element
@@ -126,29 +143,26 @@ argcasematch (const char *arg, const char *const *arglist,
 }
 
 /* Error reporting for argmatch.
-   KIND is a description of the type of entity that was being matched.
+   CONTEXT is a description of the type of entity that was being matched.
    VALUE is the invalid value that was given.
    PROBLEM is the return value from argmatch.  */
 
 void
-argmatch_invalid (const char *kind, const char *value, int problem)
+argmatch_invalid (const char *context, const char *value, int problem)
 {
   enum quoting_style saved_quoting_style;
+  char const *format;
 
   /* Make sure to have a good quoting style to report errors.
      literal is insane here. */
   saved_quoting_style = get_quoting_style (NULL);
   set_quoting_style (NULL, ARGMATCH_QUOTING_STYLE);
 
-  /* There is an error */
-  fprintf (stderr, "%s: ", program_name);
-  if (problem == -1)
-    fprintf (stderr, _("invalid argument %s for `%s'"),
-            quotearg (value), kind);
-  else                         /* Assume -2.  */
-    fprintf (stderr, _("ambiguous argument %s for `%s'"),
-            quotearg (value), kind);
-  putc ('\n', stderr);
+  format = (problem == -1
+           ? _("%s: invalid argument `%s' for `%s'\n")
+           : _("%s: ambiguous argument `%s' for `%s'\n"));
+
+  fprintf (stderr, format, program_name, quotearg (value), context);
 
   set_quoting_style (NULL, saved_quoting_style);
 }
@@ -181,41 +195,38 @@ argmatch_valid (const char *const *arglist,
   putc ('\n', stderr);
 }
 
-/* Call __argmatch_internal, but handle the error so that it never
-   returns.  Errors are reported to the users with a list of valid
-   values.
+/* Never failing versions of the previous functions.
+
+   CONTEXT is the context for which argmatch is called (e.g.,
+   "--version-control", or "$VERSION_CONTROL" etc.).  Upon failure,
+   calls the (supposed never to return) function EXIT_FN. */
 
-   KIND is a description of the type of entity that was being matched.
-   ARG, ARGLIST, and SENSITIVE are the same as in __argmatch_internal
-   VALIST, and VALSIZE are the same as in valid_args */
 int
-__xargmatch_internal (const char *kind, const char *arg,
-                     const char *const *arglist,
+__xargmatch_internal (const char *context,
+                     const char *arg, const char *const *arglist,
                      const char *vallist, size_t valsize,
-                     int case_sensitive)
+                     int case_sensitive,
+                     argmatch_exit_fn exit_fn)
 {
-  int i;
-
-  i = __argmatch_internal (arg, arglist, vallist, valsize, case_sensitive);
-  if (i >= 0)
-    {
-      /* Success */
-      return i;
-    }
-  else
-    {
-      /* Failure */
-      argmatch_invalid (kind, arg, i);
-      argmatch_valid (arglist, vallist, valsize);
-      exit (EXIT_BADARG);
-    }
-  return -1;   /* To please some compilers */
+  int res = __argmatch_internal (arg, arglist,
+                                vallist, valsize,
+                                case_sensitive);
+  if (res >= 0)
+    /* Success. */
+    return res;
+
+  /* We failed.  Explain why. */
+  argmatch_invalid (context, arg, res);
+  argmatch_valid (arglist, vallist, valsize);
+  (*exit_fn) ();
+
+  return -1; /* To please the compilers. */
 }
 
 /* Look for VALUE in VALLIST, an array of objects of size VALSIZE and
    return the first corresponding argument in ARGLIST */
 const char *
-argmatch_to_argument (char *value,
+argmatch_to_argument (const char *value,
                      const char *const *arglist,
                      const char *vallist, size_t valsize)
 {
@@ -231,7 +242,7 @@ argmatch_to_argument (char *value,
 /*
  * Based on "getversion.c" by David MacKenzie <djm@gnu.ai.mit.edu>
  */
-char *rogram_name;
+char *program_name;
 extern const char *getenv ();
 
 /* When to make backup files.  */