Add wc.

1 files changed, 60 insertions, 0 deletions

diff --git a/toys/wc.c b/toys/wc.c
new file mode 100644
index 00000000..81fde800
--- /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);
+}