libroot: Replace dirname, basename with musl versions.

From latest musl release (1.2.5).

Change-Id: I6850b6fc9f05a46348a6d858bc58d66e34d0a172
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9059
Reviewed-by: waddlesplash <[email protected]>

src/system/libroot/posix/Jamfile

@@ -36,7 +36,6 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			fcntl.cpp
 			glob.c
 			inttypes.c
-			libgen.cpp
 			poll.cpp
 			$(PWD_BACKEND)
 			scheduler.cpp

src/system/libroot/posix/libgen.cpp

@@ -1,61 +0,0 @@
-/*
- * Copyright 2009, Haiku Inc. All rights reserved.
- * Distributed under the terms of the MIT License.
- *
- * Authors:
- *		Salvatore Benedetto <[email protected]>
- */
-
-#include <libgen.h>
-#include <string.h>
-
-
-char*
-basename(char *filepath)
-{
-	if (filepath == NULL || filepath[0] == '\0')
-		return (char *)".";
-
-	size_t length = strlen(filepath);
-	/* Remove trailing slashes if any */
-	while (filepath[--length] == '/' && length)
-		filepath[length] = '\0';
-
-	char *last = strrchr(filepath, '/');
-	/* If no slash were found return the whole string */
-	if (last == NULL)
-		return filepath;
-
-	/* If the next char is the end it means we got only "/" 
-	 * and we don't have to truncate */
-	if (*(last + 1) != '\0')
-		++last;
-
-	return last;
-}
-
-
-char*
-dirname(char *filepath)
-{
-	if (filepath == NULL || filepath[0] == '\0')
-		return (char *)".";
-
-	size_t length = strlen(filepath);
-	/* Remove trailing slashes if any */
-	while (filepath[--length] == '/' && length)
-		filepath[length] = '\0';
-
-	char *last = strrchr(filepath, '/');
-	/* If no slash were found return a dot */
-	if (last == NULL)
-		return (char *)".";
-
-	/* In case we got just "/" don't truncate it */
-	if (last == filepath)
-		last++;
-
-	*last = '\0';
-
-	return filepath;
-}

src/system/libroot/posix/musl/misc/Jamfile

@@ -11,6 +11,8 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 
 		MergeObject <$(architecture)>posix_musl_misc.o :
 			a64l.c
+			basename.c
+			dirname.c
 			ffs.c
 			ftw.c
 			getsubopt.c

src/system/libroot/posix/musl/misc/basename.c

@@ -0,0 +1,12 @@
+#include <string.h>
+#include <libgen.h>
+
+char *basename(char *s)
+{
+	size_t i;
+	if (!s || !*s) return ".";
+	i = strlen(s)-1;
+	for (; i&&s[i]=='/'; i--) s[i] = 0;
+	for (; i&&s[i-1]!='/'; i--);
+	return s+i;
+}

src/system/libroot/posix/musl/misc/dirname.c

@@ -0,0 +1,14 @@
+#include <string.h>
+#include <libgen.h>
+
+char *dirname(char *s)
+{
+	size_t i;
+	if (!s || !*s) return ".";
+	i = strlen(s)-1;
+	for (; s[i]=='/'; i--) if (!i) return "/";
+	for (; s[i]!='/'; i--) if (!i) return ".";
+	for (; s[i]=='/'; i--) if (!i) return "/";
+	s[i+1] = 0;
+	return s;
+}