#include <string.h>
#endif
-#include <ctype.h>
#include "filenames.h"
+#include "safe-ctype.h"
/*
#else
for (;;)
{
- int c1 = tolower (*s1);
- int c2 = tolower (*s2);
+ int c1 = TOLOWER (*s1);
+ int c2 = TOLOWER (*s2);
/* On DOS-based file systems, the '/' and the '\' are equivalent. */
if (c1 == '/')
#endif
}
+/*
+
+@deftypefn Extension int filename_ncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})
+
+Return zero if the two file names @var{s1} and @var{s2} are equivalent
+in range @var{n}.
+If not equivalent, the returned value is similar to what @code{strncmp}
+would return. In other words, it returns a negative value if @var{s1}
+is less than @var{s2}, or a positive value if @var{s2} is greater than
+@var{s2}.
+
+This function does not normalize file names. As a result, this function
+will treat filenames that are spelled differently as different even in
+the case when the two filenames point to the same underlying file.
+However, it does handle the fact that on DOS-like file systems, forward
+and backward slashes are equal.
+
+@end deftypefn
+
+*/
+
+int
+filename_ncmp (const char *s1, const char *s2, size_t n)
+{
+#ifndef HAVE_DOS_BASED_FILE_SYSTEM
+ return strncmp(s1, s2, n);
+#else
+ if (!n)
+ return 0;
+ for (; n > 0; --n)
+ {
+ int c1 = TOLOWER (*s1);
+ int c2 = TOLOWER (*s2);
+
+ /* On DOS-based file systems, the '/' and the '\' are equivalent. */
+ if (c1 == '/')
+ c1 = '\\';
+ if (c2 == '/')
+ c2 = '\\';
+
+ if (c1 == '\0' || c1 != c2)
+ return (c1 - c2);
+
+ s1++;
+ s2++;
+ }
+ return 0;
+#endif
+}