commit 4163c691dfb2e1b681a2036c49c0663cae1d7f59
parent 279e7fc70338626ed540163afa7e1450ae4ce866
Author: tgoodwin <tgoodwin>
Date: Wed, 8 Jul 1998 17:00:32 +0000
completely revamp to use my `+' example
Diffstat:
| M | addon.c | | | 26 | ++++++++++---------------- |
| M | addon.h | | | 46 | ++++++++++++++++++---------------------------- |
2 files changed, 28 insertions(+), 44 deletions(-)
diff --git a/addon.c b/addon.c
@@ -1,22 +1,16 @@
/*
- This file contains the implementations of any locally defined
- builtins.
+ This file is NOT BUILT by default. Together with addon.h, it
+ provides an example of how to add new builtins to rc.
*/
-#ifdef DWS
-
-/*
- This is what DaviD Sanderson (dws@cs.wisc.edu) uses.
-*/
-
-#include <sys/types.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-
-#include "rc.h" /* for bool TRUE, FALSE */
+#include "rc.h"
#include "addon.h"
-#include "addon/access.c"
-#include "addon/test.c"
+void b_add(char **av) {
+ long sum = 0;
-#endif
+ while (*++av)
+ sum += atol(*av);
+ fprint(1, "%ld\n", sum);
+ set(TRUE);
+}
diff --git a/addon.h b/addon.h
@@ -1,38 +1,28 @@
/*
- This file is the interface to the rest of rc for any locally
- defined addon builtins. By default there are none.
- The interface consists of the following macro.
-
- ADDONS A comma-separated list of pairs of function pointers
- and string literals.
-
- The addon functions must also have proper prototypes in this file.
- The builtins all have the form:
-
+ This file is NOT BUILT by default. Together with addon.c, it
+ provides an example of how to add new builtins to rc.
+
+ To define a new builtin, it must appear in the macro ADDONS, which
+ is a comma-separated list of pairs of function pointers (the
+ implementation of the new builtin) and string literals (the name of
+ the new builtin).
+
+ Any new builtin functions must also have proper prototypes in this
+ file. This is always of the same form.
+
void b_NAME(char **av);
-
+
+ The first argument, av[0], is the name of the builtin. The last
+ argument is followed by a NULL pointer.
+
Builtins report their exit status using set(TRUE) or set(FALSE).
- Example:
-
- #define ADDONS { b_test, "test" },
- extern void b_test(char **av);
*/
-#define ADDONS /* no addons by default */
-
-#ifdef DWS
-
-/*
- This is what DaviD Sanderson (dws@cs.wisc.edu) uses.
-*/
+#if RC_ADDON
-#undef ADDONS
-#define ADDONS { b_access, "access" },\
- { b_test, "test" },\
- { b_test, "[" },
+#define ADDONS { b_add, "+" },
-extern void b_access(char **av);
-extern void b_test(char **av);
+extern void b_add(char **av);
#endif
