difftool: handle unmerged files in dir-diff mode
[gitweb.git] / compat / basename.c
index d8f8a3c6dc039ff8891d04857be737b29259d7c6..96bd9533b448e56176a335a41e32f9bb2dd24d03 100644 (file)
@@ -1,15 +1,71 @@
 #include "../git-compat-util.h"
+#include "../strbuf.h"
 
 /* Adapted from libiberty's basename.c.  */
 char *gitbasename (char *path)
 {
        const char *base;
-       /* Skip over the disk name in MSDOS pathnames. */
-       if (has_dos_drive_prefix(path))
-               path += 2;
+
+       if (path)
+               skip_dos_drive_prefix(&path);
+
+       if (!path || !*path)
+               return ".";
+
        for (base = path; *path; path++) {
-               if (is_dir_sep(*path))
-                       base = path + 1;
+               if (!is_dir_sep(*path))
+                       continue;
+               do {
+                       path++;
+               } while (is_dir_sep(*path));
+               if (*path)
+                       base = path;
+               else
+                       while (--path != base && is_dir_sep(*path))
+                               *path = '\0';
        }
        return (char *)base;
 }
+
+char *gitdirname(char *path)
+{
+       static struct strbuf buf = STRBUF_INIT;
+       char *p = path, *slash = NULL, c;
+       int dos_drive_prefix;
+
+       if (!p)
+               return ".";
+
+       if ((dos_drive_prefix = skip_dos_drive_prefix(&p)) && !*p)
+               goto dot;
+
+       /*
+        * POSIX.1-2001 says dirname("/") should return "/", and dirname("//")
+        * should return "//", but dirname("///") should return "/" again.
+        */
+       if (is_dir_sep(*p)) {
+               if (!p[1] || (is_dir_sep(p[1]) && !p[2]))
+                       return path;
+               slash = ++p;
+       }
+       while ((c = *(p++)))
+               if (is_dir_sep(c)) {
+                       char *tentative = p - 1;
+
+                       /* POSIX.1-2001 says to ignore trailing slashes */
+                       while (is_dir_sep(*p))
+                               p++;
+                       if (*p)
+                               slash = tentative;
+               }
+
+       if (slash) {
+               *slash = '\0';
+               return path;
+       }
+
+dot:
+       strbuf_reset(&buf);
+       strbuf_addf(&buf, "%.*s.", dos_drive_prefix, path);
+       return buf.buf;
+}