set default newlib dir's structure

git-svn-id: svn://kolibrios.org@4874 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/stdio/sccl.c

@@ -0,0 +1,127 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* Split from vfscanf.c  */
+
+#include <_ansi.h>
+#include <reent.h>
+#include <newlib.h>
+#include <stdio.h>
+#include "local.h"
+
+/*
+ * Fill in the given table from the scanset at the given format
+ * (just after `[').  Return a pointer to the character past the
+ * closing `]'.  The table has a 1 wherever characters should be
+ * considered part of the scanset.
+ */
+
+u_char *
+_DEFUN(__sccl, (tab, fmt),
+       register char *tab _AND
+       register u_char *fmt)
+{
+  register int c, n, v;
+
+  /* first `clear' the whole table */
+  c = *fmt++;			/* first char hat => negated scanset */
+  if (c == '^')
+    {
+      v = 1;			/* default => accept */
+      c = *fmt++;		/* get new first char */
+    }
+  else
+    v = 0;			/* default => reject */
+  /* should probably use memset here */
+  for (n = 0; n < 256; n++)
+    tab[n] = v;
+  if (c == 0)
+    return fmt - 1;		/* format ended before closing ] */
+
+  /*
+   * Now set the entries corresponding to the actual scanset to the
+   * opposite of the above.
+   *
+   * The first character may be ']' (or '-') without being special; the
+   * last character may be '-'.
+   */
+
+  v = 1 - v;
+  for (;;)
+    {
+      tab[c] = v;		/* take character c */
+    doswitch:
+      n = *fmt++;		/* and examine the next */
+      switch (n)
+	{
+
+	case 0:		/* format ended too soon */
+	  return fmt - 1;
+
+	case '-':
+	  /*
+	   * A scanset of the form [01+-] is defined as `the digit 0, the
+	   * digit 1, the character +, the character -', but the effect of a
+	   * scanset such as [a-zA-Z0-9] is implementation defined.  The V7
+	   * Unix scanf treats `a-z' as `the letters a through z', but treats
+	   * `a-a' as `the letter a, the character -, and the letter a'.
+	   *
+	   * For compatibility, the `-' is not considerd to define a range if
+	   * the character following it is either a close bracket (required by
+	   * ANSI) or is not numerically greater than the character we just
+	   * stored in the table (c).
+	   */
+	  n = *fmt;
+	  if (n == ']' || n < c)
+	    {
+	      c = '-';
+	      break;		/* resume the for(;;) */
+	    }
+	  fmt++;
+	  do
+	    {			/* fill in the range */
+	      tab[++c] = v;
+	    }
+	  while (c < n);
+#if 1			/* XXX another disgusting compatibility hack */
+	  /*
+	   * Alas, the V7 Unix scanf also treats formats such
+	   * as [a-c-e] as `the letters a through e'. This too
+	   * is permitted by the standard....
+	   */
+	  goto doswitch;
+#else
+	  c = *fmt++;
+	  if (c == 0)
+	    return fmt - 1;
+	  if (c == ']')
+	    return fmt;
+#endif
+
+	  break;
+
+
+	case ']':		/* end of scanset */
+	  return fmt;
+
+	default:		/* just another character */
+	  c = n;
+	  break;
+	}
+    }
+  /* NOTREACHED */
+}