[patch] dev-libs/klibc/files/oe/klibc-1.5.15/wc.patch

wc.patch (text/plain), 6.22 KB, created by Christopher Friedt on 2009-09-14 16:42:19 UTC

Index: klibc-1.5/usr/utils/Kbuild
===================================================================
--- klibc-1.5.15/usr/utils/Kbuild_orig	2009-09-05 17:28:18.000000000 -0400
+++ klibc-1.5.15/usr/utils/Kbuild	2009-09-05 17:28:42.000000000 -0400
@@ -4,7 +4,7 @@
 
 progs := chroot dd mkdir mkfifo mknod mount pivot_root umount
 progs += true false sleep ln nuke minips cat
-progs += uname halt kill readlink cpio sync dmesg losetup
+progs += uname halt kill readlink cpio sync dmesg losetup wc
 
 static-y := $(addprefix static/, $(progs))
 shared-y := $(addprefix shared/, $(progs))
@@ -56,6 +56,8 @@
 shared/sync-y       := sync.o
 static/losetup-y    := losetup.o
 shared/losetup-y    := losetup.o
+static/wc-y         := wc.o
+shared/wc-y         := wc.o
 
 # Additionally linked targets
 always := static/reboot static/poweroff shared/reboot shared/poweroff
 
Index: klibc-1.5/usr/utils/wc.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ klibc-1.5/usr/utils/wc.c	2008-04-14 23:25:15.449292711 +0200
@@ -0,0 +1,208 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * wc implementation for busybox
+ *
+ * Copyright (C) 2003  Manuel Novoa III  <[e-mail]>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- option -m is not currently supported. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/wc.html */
+
+/* Mar 16, 2003      Manuel Novoa III   ([e-mail])
+ *
+ * Rewritten to fix a number of problems and do some size optimizations.
+ * Problems in the previous busybox implementation (besides bloat) included:
+ *  1) broken 'wc -c' optimization (read note below)
+ *  2) broken handling of '-' args
+ *  3) no checking of ferror on EOF returns
+ *  4) isprint() wasn't considered when word counting.
+ *
+ * TODO:
+ *
+ * When locale support is enabled, count multibyte chars in the '-m' case.
+ *
+ * NOTES:
+ *
+ * The previous busybox wc attempted an optimization using stat for the
+ * case of counting chars only.  I omitted that because it was broken.
+ * It didn't take into account the possibility of input coming from a
+ * pipe, or input from a file with file pointer not at the beginning.
+ *
+ * To implement such a speed optimization correctly, not only do you
+ * need the size, but also the file position.  Note also that the
+ * file position may be past the end of file.  Consider the example
+ * (adapted from example in gnu wc.c)
+ *
+ *      echo hello > /tmp/testfile &&
+ *      (dd ibs=1k skip=1 count=0 &> /dev/null; wc -c) < /tmp/testfile
+ *
+ * for which 'wc -c' should output '0'.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#undef isspace
+#undef isprint
+#define isspace(c) ((((c) == ' ') || (((unsigned int)((c) - 9)) <= (13 - 9))))
+#define isprint(c) (((unsigned int)((c) - 0x20)) <= (0x7e - 0x20))
+#define isspace_given_isprint(c) ((c) == ' ')
+
+#define COUNT_T unsigned long
+#define COUNT_FMT "u"
+#define optind 1
+FILE *fopen_or_warn_stdin(const char *filename)
+{
+        FILE *fp = stdin;
+
+        if (filename[0]) {
+                fp = fopen(filename, "r");
+        }
+
+        return fp;
+}
+
+enum {
+	WC_LINES	= 0,
+	WC_WORDS	= 1,
+	WC_CHARS	= 2,
+	WC_LENGTH	= 3
+};
+
+int main(int argc, char **argv)
+{
+	FILE *fp;
+	const char *s, *arg;
+	const char *start_fmt = "%9"COUNT_FMT;
+	const char *fname_fmt = " %s\n";
+	COUNT_T *pcounts;
+	COUNT_T counts[4];
+	COUNT_T totals[4];
+	unsigned linepos;
+	unsigned u;
+	int num_files = 0;
+	int c;
+	signed char status = EXIT_SUCCESS;
+	signed char in_word;
+	unsigned print_type;
+
+	print_type = getopt(argc, argv, "lwcL");
+
+	if (print_type == 0) {
+		print_type = (1 << WC_LINES) | (1 << WC_WORDS) | (1 << WC_CHARS);
+	}
+
+	argv += optind;
+	if (!argv[0]) {
+		*--argv = (char *) "wc";
+		fname_fmt = "\n";
+		if (!((print_type-1) & print_type)) /* exactly one option? */
+			start_fmt = "%"COUNT_FMT;
+	}
+
+	memset(totals, 0, sizeof(totals));
+
+	pcounts = counts;
+
+	while ((arg = *argv++) != 0) {
+		++num_files;
+		fp = fopen_or_warn_stdin(arg);
+		if (!fp) {
+			status = EXIT_FAILURE;
+			continue;
+		}
+
+		memset(counts, 0, sizeof(counts));
+		linepos = 0;
+		in_word = 0;
+
+		do {
+			/* Our -w doesn't match GNU wc exactly... oh well */
+
+			++counts[WC_CHARS];
+			c = getc(fp);
+			if (isprint(c)) {
+				++linepos;
+				if (!isspace_given_isprint(c)) {
+					in_word = 1;
+					continue;
+				}
+			} else if (((unsigned int)(c - 9)) <= 4) {
+				/* \t  9
+				 * \n 10
+				 * \v 11
+				 * \f 12
+				 * \r 13
+				 */
+				if (c == '\t') {
+					linepos = (linepos | 7) + 1;
+				} else {			/* '\n', '\r', '\f', or '\v' */
+				DO_EOF:
+					if (linepos > counts[WC_LENGTH]) {
+						counts[WC_LENGTH] = linepos;
+					}
+					if (c == '\n') {
+						++counts[WC_LINES];
+					}
+					if (c != '\v') {
+						linepos = 0;
+					}
+				}
+			} else if (c == EOF) {
+/*				if (ferror(fp)) {
+					status = EXIT_FAILURE;
+				}
+*/				--counts[WC_CHARS];
+				goto DO_EOF;		/* Treat an EOF as '\r'. */
+			} else {
+				continue;
+			}
+
+			counts[WC_WORDS] += in_word;
+			in_word = 0;
+			if (c == EOF) {
+				break;
+			}
+		} while (1);
+
+		if (totals[WC_LENGTH] < counts[WC_LENGTH]) {
+			totals[WC_LENGTH] = counts[WC_LENGTH];
+		}
+		totals[WC_LENGTH] -= counts[WC_LENGTH];
+
+		if(fp != stdin)
+			fclose(fp);
+
+	OUTPUT:
+		/* coreutils wc tries hard to print pretty columns
+		 * (saves results for all files, find max col len etc...)
+		 * we won't try that hard, it will bloat us too much */
+		s = start_fmt;
+		u = 0;
+		do {
+			if (print_type & (1 << u)) {
+				printf(s, pcounts[u]);
+				s = " %9"COUNT_FMT; /* Ok... restore the leading space. */
+			}
+			totals[u] += pcounts[u];
+		} while (++u < 4);
+		printf(fname_fmt, arg);
+	}
+
+	/* If more than one file was processed, we want the totals.  To save some
+	 * space, we set the pcounts ptr to the totals array.  This has the side
+	 * effect of trashing the totals array after outputting it, but that's
+	 * irrelavent since we no longer need it. */
+	if (num_files > 1) {
+		num_files = 0;				/* Make sure we don't get here again. */
+		arg = "total";
+		pcounts = totals;
+		--argv;
+		goto OUTPUT;
+	}
+
+	fflush(stdout);
+	exit(status);
+}