2007-04-17 Brian Dessent <brian@dessent.net>

        * libc/stdio/sscanf.c: Update documentation comments.
        * libc/stdio/vfscanf.c (__SVFSCANF_R): Handle j, t, and z modifiers.

2 files changed, 58 insertions, 4 deletions

diff --git a/newlib/libc/stdio/sscanf.c b/newlib/libc/stdio/sscanf.c
index 5ad39d8b7..b74dd3ebe 100644
--- a/newlib/libc/stdio/sscanf.c
+++ b/newlib/libc/stdio/sscanf.c
@@ -147,9 +147,9 @@ DESCRIPTION
 		Then <<scanf>> proceeds to the next format specification.
 
         o size
-		<<h>>, <<l>>, and <<L>> are optional size characters which
-		override the default way that <<scanf>> interprets the
-		data type of the corresponding argument.
+		<<h>>, <<j>>, <<l>>, <<L>>, <<t>>, and <<z>> are optional size
+		characters which override the default way that <<scanf>>
+		interprets the data type of the corresponding argument.
 
 
 .Modifier   Type(s)
@@ -162,6 +162,11 @@ DESCRIPTION
 .   h       D, I, O, U, X     no effect
 .           e, f, c, s, p
 .
+.   j       d, i, o, u, x, n  convert input to intmax_t,
+.                             store in intmax_t object
+.
+.   j       all others        no effect
+.
 .   l       d, i, o, u, x, n  convert input to long,
 .                             store in long object
 .
@@ -180,7 +185,18 @@ DESCRIPTION
 .   L       e, f, g, E, G     convert to long double,
 .                             store in long double
 .
-.   L      all others         no effect
+.   L       all others        no effect
+.
+.   t       d, i, o, u, x, n  convert input to ptrdiff_t,
+.                             store in ptrdiff_t object
+.
+.   t       all others        no effect
+.
+.   z       d, i, o, u, x, n  convert input to size_t,
+.                             store in size_t object
+.
+.   z       all others        no effect
+.
 
 
         o <[type]>
diff --git a/newlib/libc/stdio/vfscanf.c b/newlib/libc/stdio/vfscanf.c
index c9808bb48..3b3f63af8 100644
--- a/newlib/libc/stdio/vfscanf.c
+++ b/newlib/libc/stdio/vfscanf.c
@@ -109,6 +109,7 @@ Supporting OS subroutines required:
 #include <wctype.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <limits.h>
 #include <wchar.h>
 #include <string.h>
@@ -380,6 +381,43 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
 	  else
 	    flags |= SHORT;
 	  goto again;
+        case 'j':               /* intmax_t */
+	  if (sizeof (intmax_t) == sizeof (long))
+	    flags |= LONG;
+	  else
+	    flags |= LONGDBL;
+	  goto again;
+        case 't':               /* ptrdiff_t */
+	  if (sizeof (ptrdiff_t) < sizeof (int))
+	    /* POSIX states ptrdiff_t is 16 or more bits, as
+	       is short.  */
+	    flags |= SHORT;
+	  else if (sizeof (ptrdiff_t) == sizeof (int))
+	    /* no flag needed */;
+	  else if (sizeof (ptrdiff_t) <= sizeof (long))
+	    flags |= LONG;
+	  else
+	    /* POSIX states that at least one programming
+	       environment must support ptrdiff_t no wider than
+	       long, but that means other environments can
+	       have ptrdiff_t as wide as long long.  */
+	    flags |= LONGDBL;
+	  goto again;
+        case 'z':               /* size_t */
+	  if (sizeof (size_t) < sizeof (int))
+	    /* POSIX states size_t is 16 or more bits, as is short.  */
+	    flags |= SHORT;
+	  else if (sizeof (size_t) == sizeof (int))
+	    /* no flag needed */;
+	  else if (sizeof (size_t) <= sizeof (long))
+	    flags |= LONG;
+	  else
+	    /* POSIX states that at least one programming
+	       environment must support size_t no wider than
+	       long, but that means other environments can
+	       have size_t as wide as long long.  */
+	    flags |= LONGDBL;
+	  goto again;
 
 	case '0':
 	case '1':