changes to str from old dir

str/isempty.c

@@ -1,2 +0,0 @@
-#define _isempty_c
-int isempty(int c){ return 0; }

str/str.1

@@ -22,6 +22,10 @@ Str will exit unsuccessfully if a string is empty, as none of its contents passe
 .PP
 Str will print a message to standard error and exit unsuccessfully if used improperly.
 
+.SH EXTENSIONS FROM CTYPE
+
+Using the ctype "isvalue", which does not exist within ctype(3), will make str exit successfully as long as the given string(s) have non-zero length.
+
 .SH BUGS
 
 There's no way of knowing which argument failed the test without re-testing arguments individually.

str/str.c

@@ -1,31 +1,21 @@
+#include <ctype.h>
 #include <stddef.h> /* NULL */
 #include <stdio.h> /* fprintf(3) */
 #include <string.h> /* strcmp(3) */
-#if defined DONT_USE_SYSTEM_SYSEXITS
-#	include "../include/sysexits.h" /* EX_USAGE */
-#else
-#	include <sysexits.h> /* EX_USAGE */
+#if !defined EX_USAGE
+#	include <sysexits.h>
 #endif
-
-static char *program_name = "str";
-
-/* don't use this */
-/* #include "isempty.c" */
-/* An isempty() won't work; see implementation - the default behavior of str(1)
- * is to return 1, so it would return 1 (false) no matter what. I'm not adding
- * a special case, just do something like `! str isvalue "$input"` in the
- * higher level.
- * However, if you wanna make it work, the file is included, just hack on this
- * source file after removing the comment on the include. */
-
-#include <ctype.h>
-#include "isvalue.c"
+#if defined INCLUDE_ISVALUE_C
+#	include "isvalue.c"
 /* This is a special addition to the command that lets `str isvalue "$input"`
  * function as a lightweight replacement to the common `test -n "$input"` or
  * `[ -n "$input" ]`. This will speed up your shellscript execution by a tad
  * ONLY if test(1) isn't already built into your shell (most of the time, it
  * is, and saves you the overhead of spawning a new process, which is greater
  * than the savings of switching from test(1) to this program). */
+#endif
+
+static char *program_name = "str";
 
 static struct {
 	char *name;
@@ -37,9 +27,6 @@ static struct {
 	{ "iscntrl", iscntrl },
 	{ "isdigit", isdigit },
 	{ "isxdigit", isxdigit },
-#if defined _isempty_c
-	{ "isempty", isempty },
-#endif
 	{ "isgraph", isgraph },
 	{ "islower", islower },
 	{ "isprint", isprint },