Add functions from <libgen.h>

Add memrchr.c

git-svn-id: svn://kolibrios.org@7949 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/ktcc/trunk/libc/build.bat

@@ -10,7 +10,7 @@ set CC=kos32-tcc
 set CFLAGS=-c -nostdinc -DGNUC -I"%cd%\%INCLUDE%" -Wall
 set AR=kos32-ar
 set ASM=fasm
-set dirs=stdio memory kolibrisys string stdlib math dlfcn
+set dirs=stdio memory kolibrisys string stdlib math dlfcn libgen
 rem #### END OF CONFIG SECTION ####
 
 set objs=

programs/develop/ktcc/trunk/libc/include/libgen.h

@@ -0,0 +1,7 @@
+#ifndef __KTCC_LIBGEN_H__
+#define __KTCC_LIBGEN_H__
+
+char *basename(char *path);
+char *dirname(char *path);
+
+#endif // __KTCC_LIBGEN_H__

programs/develop/ktcc/trunk/libc/include/string.h

@@ -4,6 +4,7 @@ typedef unsigned int size_t;
 
 
 extern void* memchr(const void*,int,size_t);
+extern void* memrchr(const void*,int,size_t);
 extern int memcmp(const void*,const void*,size_t);
 extern void* memcpy(void*,const void*,size_t);
 extern void* memmove(void*,const void*,size_t);

programs/develop/ktcc/trunk/libc/libgen/basename.c

@@ -0,0 +1,23 @@
+/* Return the name-within-directory of a file name.
+   Copyright (C) 1996-2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+
+char *
+basename (const char *filename)
+{
+  char *p = strrchr (filename, '/');
+  return p ? p + 1 : (char *) filename;
+}

programs/develop/ktcc/trunk/libc/libgen/dirname.c

@@ -0,0 +1,67 @@
+/* dirname - return directory part of PATH.
+   Copyright (C) 1996-2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <libgen.h>
+#include <string.h>
+
+char *
+dirname (char *path)
+{
+  static const char dot[] = ".";
+  char *last_slash;
+  /* Find last '/'.  */
+  last_slash = path != NULL ? strrchr (path, '/') : NULL;
+  if (last_slash != NULL && last_slash != path && last_slash[1] == '\0')
+    {
+      /* Determine whether all remaining characters are slashes.  */
+      char *runp;
+      for (runp = last_slash; runp != path; --runp)
+        if (runp[-1] != '/')
+          break;
+      /* The '/' is the last character, we have to look further.  */
+      if (runp != path)
+        last_slash = memrchr (path, '/', runp - path);
+    }
+  if (last_slash != NULL)
+    {
+      /* Determine whether all remaining characters are slashes.  */
+      char *runp;
+      for (runp = last_slash; runp != path; --runp)
+        if (runp[-1] != '/')
+          break;
+      /* Terminate the path.  */
+      if (runp == path)
+        {
+          /* The last slash is the first character in the string.  We have to
+             return "/".  As a special case we have to return "//" if there
+             are exactly two slashes at the beginning of the string.  See
+             XBD 4.10 Path Name Resolution for more information.  */
+          if (last_slash == path + 1)
+            ++last_slash;
+          else
+            last_slash = path + 1;
+        }
+      else
+        last_slash = runp;
+      last_slash[0] = '\0';
+    }
+  else
+    /* This assignment is ill-designed but the XPG specs require to
+       return a string containing "." in any case no directory part is
+       found and so a static and constant string is required.  */
+    path = (char *) dot;
+  return path;
+}

programs/develop/ktcc/trunk/libc/string/memrchr.c

@@ -0,0 +1,12 @@
+/* memrchr.c from musl
+ */
+
+#include <string.h>
+
+void *memrchr(const void *m, int c, size_t n)
+{
+	const unsigned char *s = m;
+	c = (unsigned char)c;
+	while (n--) if (s[n]==c) return (void *)(s+n);
+	return 0;
+}