Add wc.

diff --git a/toys/wc.c b/toys/wc.c
new file mode 100644 (file)
index 0000000..81fde80
--- /dev/null
+++ b/toys/wc.c
@@ -0,0 +1,60 @@
+/* vi: set sw=4 ts=4:
+ *
+ * wc.c - Word countA hello world program.
+ *
+ * Copyright 2011Rob Landley <rob@landley.net>
+ *
+ * See http://opengroup.org/onlinepubs/9699919799/utilities/wc.html
+
+USE_WC(NEWTOY(wc, "cwl", TOYFLAG_USR|TOYFLAG_BIN))
+
+config WC
+       bool "wc"
+       default y
+       help
+         usage: wc -lwc [FILE...]
+
+         Count lines, words, and characters in input.
+
+         -l    show lines
+         -w    show words
+         -c    show characters
+
+         By default outputs lines, words, characters, and filename for each
+         argument (or from stdin if none).
+*/
+
+#include "toys.h"
+
+static void do_wc(int fd, char *name)
+{
+       int i, len;
+       unsigned long word=0, lengths[]={0,0,0};
+
+       for (;;) {
+               len = read(fd, toybuf, sizeof(toybuf));
+               if (len<0) {
+                       perror_msg("%s",name);
+                       toys.exitval = EXIT_FAILURE;
+               }
+               if (len<1) break;
+               for (i=0; i<len; i++) {
+                       if (toybuf[i]==10) lengths[0]++;
+                       if (isspace(toybuf[i])) word=0;
+                       else {
+                               if (!word) lengths[1]++;
+                               word=1;
+                       }
+                       lengths[2]++;
+               }
+       }
+       for (i=0; i<3; i++)
+               if (!toys.optflags || (toys.optflags&(1<<i)))
+                       printf("%ld ", lengths[i]);
+       printf("%s\n", (!toys.optflags && strcmp(name,"-")) ? name : "");
+}
+
+void wc_main(void)
+{
+       loopfiles(toys.optargs, do_wc);
+}