Remove redundant stuff

1. Have a faster copy of strlcpy()
2. Remove redundant legacy files
3. Fix an issue with NULL check on array name

5 files changed, 53 insertions, 143 deletions

diff --git a/Makefile b/Makefile
index e971355..02f4661 100644
--- a/Makefile
+++ b/Makefile
@@ -5,25 +5,24 @@ MANPREFIX = $(PREFIX)/man
 
 #CPPFLAGS = -DDEBUG
 #CFLAGS = -g
-CFLAGS = -O3 -march=native -s
+CFLAGS = -O3 -march=native
 LDLIBS = -lcurses
 
-DISTFILES = nnn.c strlcat.c strlcpy.c util.h config.def.h \
-    nnn.1 Makefile README.md LICENSE
-OBJ = nnn.o strlcat.o strlcpy.o
+DISTFILES = nnn.c config.def.h nnn.1 Makefile README.md LICENSE
+LOCALCONFIG = config.h
+SRC = nnn.c
 BIN = nnn
 
 all: $(BIN)
 
-$(BIN): $(OBJ)
-	$(CC) $(CFLAGS) -o $@ $(OBJ) $(LDFLAGS) $(LDLIBS)
+$(LOCALCONFIG): config.def.h
+	cp config.def.h $@
 
-nnn.o: util.h config.h
-strlcat.o: util.h
-strlcpy.o: util.h
+$(SRC): $(LOCALCONFIG)
 
-config.h: config.def.h
-	cp config.def.h $@
+$(BIN): $(SRC)
+	$(CC) $(CFLAGS) -o $@ $(SRC) $(LDFLAGS) $(LDLIBS)
+	strip $(BIN)
 
 install: all
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
@@ -43,4 +42,4 @@ dist:
 	rm -rf nnn-$(VERSION)
 
 clean:
-	rm -f $(BIN) $(OBJ) nnn-$(VERSION).tar.gz
+	rm -f $(BIN) nnn-$(VERSION).tar.gz
diff --git a/nnn.c b/nnn.c
index 8005b28..6641a11 100644
--- a/nnn.c
+++ b/nnn.c
@@ -18,8 +18,6 @@
 #include <unistd.h>
 #include <time.h>
 
-#include "util.h"
-
 #ifdef DEBUG
 #define DEBUG_FD 8
 #define DPRINTF_D(x) xprintf(DEBUG_FD, #x "=%d\n", x)
@@ -142,6 +140,29 @@ xrealloc(void *p, size_t size)
 	return p;
 }
 
+static size_t
+xstrlcpy(char *dest, const char *src, size_t n)
+{
+	size_t i;
+
+	for (i = 0; i < n && *src; i++)
+		*dest++ = *src++;
+
+	if (n) {
+		*dest = '\0';
+
+#ifdef CHECK_XSTRLCPY_RET
+		/* Compiling this out as we are not checking
+		   the return value anywhere (controlled case).
+		   Just returning the number of bytes copied. */
+		while(*src++)
+			i++;
+#endif
+	}
+
+	return i;
+}
+
 /*
  * The poor man's implementation of memrchr().
  * We are only looking for '/' in this program.
@@ -173,11 +194,11 @@ xdirname(const char *path)
 	static char out[PATH_MAX];
 	char tmp[PATH_MAX], *p;
 
-	strlcpy(tmp, path, sizeof(tmp));
+	xstrlcpy(tmp, path, sizeof(tmp));
 	p = dirname(tmp);
 	if (p == NULL)
 		printerr(1, "dirname");
-	strlcpy(out, p, sizeof(out));
+	xstrlcpy(out, p, sizeof(out));
 	return out;
 }
 #endif
@@ -194,10 +215,10 @@ xdirname(const char *path)
 	static char name[PATH_MAX];
 	char *last_slash;
 
-	strlcpy(name, path, PATH_MAX);
+	xstrlcpy(name, path, PATH_MAX);
 
 	/* Find last '/'. */
-	last_slash = name != NULL ? strrchr(name, '/') : NULL;
+	last_slash = strrchr(name, '/');
 
 	if (last_slash != NULL && last_slash != name && last_slash[1] == '\0') {
 		/* Determine whether all remaining characters are slashes. */
@@ -523,7 +544,7 @@ mkpath(char *dir, char *name, char *out, size_t n)
 {
 	/* Handle absolute path */
 	if (name[0] == '/')
-		strlcpy(out, name, n);
+		xstrlcpy(out, name, n);
 	else {
 		/* Handle root case */
 		if (strcmp(dir, "/") == 0)
@@ -632,7 +653,7 @@ dentfill(char *path, struct entry **dents,
 		if (filter(re, dp->d_name) == 0)
 			continue;
 		*dents = xrealloc(*dents, (n + 1) * sizeof(**dents));
-		strlcpy((*dents)[n].name, dp->d_name, sizeof((*dents)[n].name));
+		xstrlcpy((*dents)[n].name, dp->d_name, sizeof((*dents)[n].name));
 		/* Get mode flags */
 		mkpath(path, dp->d_name, newpath, sizeof(newpath));
 		r = lstat(newpath, &sb);
@@ -797,8 +818,8 @@ browse(char *ipath, char *ifilter)
 	regex_t re;
 	int r, fd;
 
-	strlcpy(path, ipath, sizeof(path));
-	strlcpy(fltr, ifilter, sizeof(fltr));
+	xstrlcpy(path, ipath, sizeof(path));
+	xstrlcpy(fltr, ifilter, sizeof(fltr));
 	oldpath[0] = '\0';
 	newpath[0] = '\0';
 begin:
@@ -829,10 +850,10 @@ nochange:
 				goto nochange;
 			}
 			/* Save history */
-			strlcpy(oldpath, path, sizeof(oldpath));
-			strlcpy(path, dir, sizeof(path));
+			xstrlcpy(oldpath, path, sizeof(oldpath));
+			xstrlcpy(path, dir, sizeof(path));
 			/* Reset filter */
-			strlcpy(fltr, ifilter, sizeof(fltr));
+			xstrlcpy(fltr, ifilter, sizeof(fltr));
 			goto begin;
 		case SEL_GOIN:
 			/* Cannot descend in empty directories */
@@ -863,9 +884,9 @@ nochange:
 					printwarn();
 					goto nochange;
 				}
-				strlcpy(path, newpath, sizeof(path));
+				xstrlcpy(path, newpath, sizeof(path));
 				/* Reset filter */
-				strlcpy(fltr, ifilter, sizeof(fltr));
+				xstrlcpy(fltr, ifilter, sizeof(fltr));
 				goto begin;
 			case S_IFREG:
 			{
@@ -935,7 +956,7 @@ nochange:
 			r = setfilter(&re, tmp);
 			if (r != 0)
 				goto nochange;
-			strlcpy(fltr, tmp, sizeof(fltr));
+			xstrlcpy(fltr, tmp, sizeof(fltr));
 			DPRINTF_S(fltr);
 			/* Save current */
 			if (ndents > 0)
@@ -982,9 +1003,9 @@ nochange:
 				printwarn();
 				goto nochange;
 			}
-			strlcpy(path, newpath, sizeof(path));
+			xstrlcpy(path, newpath, sizeof(path));
 			/* Reset filter */
-			strlcpy(fltr, ifilter, sizeof(fltr));
+			xstrlcpy(fltr, ifilter, sizeof(fltr));
 			DPRINTF_S(path);
 			goto begin;
 		case SEL_CDHOME:
@@ -997,15 +1018,15 @@ nochange:
 				printwarn();
 				goto nochange;
 			}
-			strlcpy(path, tmp, sizeof(path));
+			xstrlcpy(path, tmp, sizeof(path));
 			/* Reset filter */
-			strlcpy(fltr, ifilter, sizeof(fltr));
+			xstrlcpy(fltr, ifilter, sizeof(fltr));
 			DPRINTF_S(path);
 			goto begin;
 		case SEL_TOGGLEDOT:
 			showhidden ^= 1;
 			initfilter(showhidden, &ifilter);
-			strlcpy(fltr, ifilter, sizeof(fltr));
+			xstrlcpy(fltr, ifilter, sizeof(fltr));
 			goto begin;
 		case SEL_DETAIL:
 			showdetail = !showdetail;
diff --git a/strlcat.c b/strlcat.c
deleted file mode 100644
index bc523fb..0000000
--- a/strlcat.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <sys/types.h>
-#include <string.h>
-
-#include "util.h"
-
-/*
- * Appends src to string dst of size dsize (unlike strncat, dsize is the
- * full size of dst, not space left).  At most dsize-1 characters
- * will be copied.  Always NUL terminates (unless dsize <= strlen(dst)).
- * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
- * If retval >= dsize, truncation occurred.
- */
-size_t
-strlcat(char *dst, const char *src, size_t dsize)
-{
-	const char *odst = dst;
-	const char *osrc = src;
-	size_t n = dsize;
-	size_t dlen;
-
-	/* Find the end of dst and adjust bytes left but don't go past end. */
-	while (n-- != 0 && *dst != '\0')
-		dst++;
-	dlen = dst - odst;
-	n = dsize - dlen;
-
-	if (n-- == 0)
-		return(dlen + strlen(src));
-	while (*src != '\0') {
-		if (n != 0) {
-			*dst++ = *src;
-			n--;
-		}
-		src++;
-	}
-	*dst = '\0';
-
-	return(dlen + (src - osrc));	/* count does not include NUL */
-}
diff --git a/strlcpy.c b/strlcpy.c
deleted file mode 100644
index 0ec2b78..0000000
--- a/strlcpy.c
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <sys/types.h>
-#include <string.h>
-
-#include "util.h"
-
-/*
- * Copy string src to buffer dst of size dsize.  At most dsize-1
- * chars will be copied.  Always NUL terminates (unless dsize == 0).
- * Returns strlen(src); if retval >= dsize, truncation occurred.
- */
-size_t
-strlcpy(char *dst, const char *src, size_t dsize)
-{
-	const char *osrc = src;
-	size_t nleft = dsize;
-
-	/* Copy as many bytes as will fit. */
-	if (nleft != 0) {
-		while (--nleft != 0) {
-			if ((*dst++ = *src++) == '\0')
-				break;
-		}
-	}
-
-	/* Not enough room in dst, add NUL and traverse rest of src. */
-	if (nleft == 0) {
-		if (dsize != 0)
-			*dst = '\0';		/* NUL-terminate dst */
-		while (*src++)
-			;
-	}
-
-	return(src - osrc - 1);	/* count does not include NUL */
-}
diff --git a/util.h b/util.h
deleted file mode 100644
index c4d1904..0000000
--- a/util.h
+++ /dev/null
@@ -1,5 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#undef strlcat
-size_t strlcat(char *, const char *, size_t);
-#undef strlcpy
-size_t strlcpy(char *, const char *, size_t);