add directory study

study/linux-travel/MINIX-1.5/1.5/Source/commands/wc.c

@@ -0,0 +1,147 @@
+/* wc - count lines, words and characters	Author: David Messer */
+
+#include <stdio.h>
+#define isspace(c) (c==' ' || c=='\t' || c=='\n' || c=='\f' || c=='\r')
+
+/*
+ *
+ *	Usage:  wc [-lwc] [names]
+ *
+ *		Flags:
+ *			l - count lines.
+ *			w - count words.
+ *			c - count characters.
+ *
+ *		Flags l, w, and c are default.
+ *		Words are delimited by any non-alphabetic character.
+ *
+ *  Released into the PUBLIC-DOMAIN 02/10/86
+ *
+ *	If you find this program to be of use to you, a donation of
+ *	whatever you think it is worth will be cheerfully accepted.
+ *
+ *	Written by: David L. Messer
+ *				P.O. Box 19130, Mpls, MN,  55119
+ *      Program (heavily) modified by Andy Tanenbaum
+ */
+
+
+int lflag;			/* Count lines */
+int wflag;			/* Count words */
+int cflag;			/* Count characters */
+
+long lcount;			/* Count of lines */
+long wcount;			/* Count of words */
+long ccount;			/* Count of characters */
+
+long ltotal;			/* Total count of lines */
+long wtotal;			/* Total count of words */
+long ctotal;			/* Total count of characters */
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+  int k;
+  char *cp;
+  int tflag, files;
+  int i;
+
+  /* Get flags. */
+  files = argc - 1;
+  k = 1;
+  cp = argv[1];
+  if (argc > 1 && *cp++ == '-') {
+	files--;
+	k++;			/* points to first file */
+	while (*cp != 0) {
+		switch (*cp) {
+		    case 'l':	lflag++;	break;
+		    case 'w':	wflag++;	break;
+		    case 'c':	cflag++;	break;
+		    default:	usage();
+		}
+		cp++;
+	}
+  }
+
+  /* If no flags are set, treat as wc -lwc. */
+  if (!lflag && !wflag && !cflag) {
+	lflag = 1;
+	wflag = 1;
+	cflag = 1;
+  }
+
+  /* Process files. */
+  tflag = files >= 2;		/* set if # files > 1 */
+
+  /* Check to see if input comes from std input. */
+  if (k >= argc) {
+	count(stdin);
+	if (lflag) printf(" %6ld", lcount);
+	if (wflag) printf(" %6ld", wcount);
+	if (cflag) printf(" %6ld", ccount);
+	printf(" \n");
+	fflush(stdout);
+	exit(0);
+  }
+
+  /* There is an explicit list of files.  Loop on files. */
+  while (k < argc) {
+	FILE *f;
+
+	if ((f = fopen(argv[k], "r")) == (FILE *) NULL) {
+		fprintf(stderr, "wc: cannot open %s\n", argv[k]);
+	} else {
+		count(f);
+		if (lflag) printf(" %6ld", lcount);
+		if (wflag) printf(" %6ld", wcount);
+		if (cflag) printf(" %6ld", ccount);
+		printf(" %s\n", argv[k]);
+		fclose(f);
+	}
+	k++;
+  }
+
+  if (tflag) {
+	if (lflag) printf(" %6ld", ltotal);
+	if (wflag) printf(" %6ld", wtotal);
+	if (cflag) printf(" %6ld", ctotal);
+	printf(" total\n");
+  }
+  fflush(stdout);
+  exit(0);
+}
+
+count(f)
+FILE *f;
+{
+  register int c;
+  register int word = 0;
+
+  lcount = 0;
+  wcount = 0;
+  ccount = 0L;
+
+  while ((c = getc(f)) != EOF) {
+	ccount++;
+
+	if (isspace(c)) {
+		if (word) wcount++;
+		word = 0;
+	} else {
+		word = 1;
+	}
+
+	if (c == '\n' || c == '\f') lcount++;
+  }
+  ltotal += lcount;
+  wtotal += wcount;
+  ctotal += ccount;
+}
+
+usage()
+{
+  std_err("Usage: wc [-lwc] [name ...]\n");
+  exit(1);
+}