Fix cls_double_va.c and update docs

doc/libffi.info

@@ -1,10 +1,10 @@
-This is /home/green/libffi/doc/libffi.info, produced by makeinfo
+This is ../libffi/doc/libffi.info, produced by makeinfo version 4.13
-version 4.13 from /home/green/libffi/doc/libffi.texi.
+from ../libffi/doc/libffi.texi.
 
 This manual is for Libffi, a portable foreign-function interface
 library.
 
-   Copyright (C) 2008, 2010 Red Hat, Inc.
+   Copyright (C) 2008, 2010, 2011 Red Hat, Inc.
 
      Permission is granted to copy, distribute and/or modify this
      document under the terms of the GNU General Public License as
@@ -27,7 +27,7 @@ libffi
 This manual is for Libffi, a portable foreign-function interface
 library.
 
-   Copyright (C) 2008, 2010 Red Hat, Inc.
+   Copyright (C) 2008, 2010, 2011 Red Hat, Inc.
 
      Permission is granted to copy, distribute and/or modify this
      document under the terms of the GNU General Public License as
@@ -115,8 +115,6 @@ To prepare a call interface object, use the function `ffi_prep_cif'.
      want.  *note Multiple ABIs:: for more information.
 
      NARGS is the number of arguments that this function accepts.
-     `libffi' does not yet handle varargs functions; see *note Missing
-     Features:: for more information.
 
      RTYPE is a pointer to an `ffi_type' structure that describes the
      return type of the function.  *Note Types::.
@@ -129,6 +127,30 @@ To prepare a call interface object, use the function `ffi_prep_cif'.
      properly; `FFI_BAD_TYPEDEF' if one of the `ffi_type' objects is
      incorrect; or `FFI_BAD_ABI' if the ABI parameter is invalid.
 
+   If the function being called is variadic (varargs) then
+`ffi_prep_cif_var' must be used instead of `ffi_prep_cif'.
+
+ -- Function: ffi_status ffi_prep_cif_var (ffi_cif *CIF, ffi_abi
+          varabi, unsigned int NFIXEDARGS, unsigned int varntotalargs,
+          ffi_type *RTYPE, ffi_type **ARGTYPES)
+     This initializes CIF according to the given parameters for a call
+     to a variadic function.  In general it's operation is the same as
+     for `ffi_prep_cif' except that:
+
+     NFIXEDARGS is the number of fixed arguments, prior to any variadic
+     arguments.  It must be greater than zero.
+
+     NTOTALARGS the total number of arguments, including variadic and
+     fixed arguments.
+
+     Note that, different cif's must be prepped for calls to the same
+     function when different numbers of arguments are passed.
+
+     Also note that a call to `ffi_prep_cif_var' with
+     NFIXEDARGS=NOTOTALARGS is NOT equivalent to a call to
+     `ffi_prep_cif'.
+
+
    To call a function using an initialized `ffi_cif', use the
 `ffi_call' function:
 
@@ -511,9 +533,7 @@ File: libffi.info,  Node: Missing Features,  Next: Index,  Prev: Using libffi,
 `libffi' is missing a few features.  We welcome patches to add support
 for these.
 
-   * There is no support for calling varargs functions.  This may work
+   * Variadic closures.
-     on some platforms, depending on how the ABI is defined, but it is
-     not reliable.
 
    * There is no support for bit fields in structures.
 
@@ -521,6 +541,9 @@ for these.
 
    * The "raw" API is undocumented.
 
+   Note that variadic support is very new and tested on a relatively
+small number of platforms.
+
 
 File: libffi.info,  Node: Index,  Prev: Missing Features,  Up: Top
 
@@ -538,11 +561,12 @@ Index
 * closure API:                           The Closure API.      (line 13)
 * closures:                              The Closure API.      (line 13)
 * FFI:                                   Introduction.         (line 31)
-* ffi_call:                              The Basics.           (line 41)
+* ffi_call:                              The Basics.           (line 63)
 * ffi_closure_alloc:                     The Closure API.      (line 19)
 * ffi_closure_free:                      The Closure API.      (line 26)
 * FFI_CLOSURES:                          The Closure API.      (line 13)
 * ffi_prep_cif:                          The Basics.           (line 16)
+* ffi_prep_cif_var:                      The Basics.           (line 39)
 * ffi_prep_closure_loc:                  The Closure API.      (line 34)
 * ffi_status <1>:                        The Closure API.      (line 37)
 * ffi_status:                            The Basics.           (line 18)
@@ -570,24 +594,24 @@ Index
 * ffi_type_void:                         Primitive Types.      (line 10)
 * Foreign Function Interface:            Introduction.         (line 31)
 * void <1>:                              The Closure API.      (line 20)
-* void:                                  The Basics.           (line 43)
+* void:                                  The Basics.           (line 65)
 
 
 
 Tag Table:
-Node: Top724
+Node: Top712
-Node: Introduction1466
+Node: Introduction1460
-Node: Using libffi3102
+Node: Using libffi3096
-Node: The Basics3588
+Node: The Basics3582
-Node: Simple Example6374
+Node: Simple Example7224
-Node: Types7401
+Node: Types8251
-Node: Primitive Types7684
+Node: Primitive Types8534
-Node: Structures9504
+Node: Structures10354
-Node: Type Example10364
+Node: Type Example11214
-Node: Multiple ABIs11587
+Node: Multiple ABIs12437
-Node: The Closure API11958
+Node: The Closure API12808
-Node: Closure Example14902
+Node: Closure Example15752
-Node: Missing Features16461
+Node: Missing Features17311
-Node: Index16954
+Node: Index17764
 
 End Tag Table

doc/stamp-vti

@@ -1,4 +1,4 @@
 @set UPDATED 12 November 2011
 @set UPDATED-MONTH November 2011
-@set EDITION 3.0.11-rc1
+@set EDITION 3.0.11-rc2
-@set VERSION 3.0.11-rc1
+@set VERSION 3.0.11-rc2

doc/version.texi

@@ -1,4 +1,4 @@
 @set UPDATED 12 November 2011
 @set UPDATED-MONTH November 2011
-@set EDITION 3.0.11-rc1
+@set EDITION 3.0.11-rc2
-@set VERSION 3.0.11-rc1
+@set VERSION 3.0.11-rc2

testsuite/libffi.call/cls_double_va.c

@@ -50,6 +50,9 @@ int main (void)
 	printf("res: %d\n", (int) res);
 	// { dg-output "\nres: 4" }
 
+	/* The call to cls_double_va_fn is static, so have to use a normal prep_cif */
+	CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2, &ffi_type_sint, arg_types) == FFI_OK);
+
 	CHECK(ffi_prep_closure_loc(pcl, &cif, cls_double_va_fn, NULL, code) == FFI_OK);
 
 	res	= ((int(*)(char*, double))(code))(format, doubleArg);