From bce9ff7ece912d18f1d92e6759b82ef5b8ad20aa Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 14 Nov 2006 15:36:27 +0000
Subject: * Use the patched ATerm library.

---
 externals/aterm-aliasing.patch | 224 -----------------------------------------
 1 file changed, 224 deletions(-)
 delete mode 100644 externals/aterm-aliasing.patch

(limited to 'externals/aterm-aliasing.patch')

diff --git a/externals/aterm-aliasing.patch b/externals/aterm-aliasing.patch
deleted file mode 100644
index c1dfc3e0e737..000000000000
--- a/externals/aterm-aliasing.patch
+++ /dev/null
@@ -1,224 +0,0 @@
-diff -rc aterm-1142707243.10633/aterm/aterm.c aterm/aterm/aterm.c
-*** aterm-1142707243.10633/aterm/aterm.c	2006-02-08 11:35:28.000000000 +0100
---- aterm/aterm/aterm.c	2006-04-25 17:10:52.000000000 +0200
-***************
-*** 193,198 ****
---- 193,199 ----
-    /* that have char == 2 bytes, and sizeof(header_type) == 2 */
-    assert(sizeof(header_type) == sizeof(ATerm *));
-    assert(sizeof(header_type) >= 4);
-+   assert(sizeof(ATerm) == sizeof(MachineWord));
-  
-    /*}}}  */
-    /*{{{  Initialize buffer */
-diff -rc aterm-1142707243.10633/aterm/memory.c aterm/aterm/memory.c
-*** aterm-1142707243.10633/aterm/memory.c	2006-03-09 15:02:56.000000000 +0100
---- aterm/aterm/memory.c	2006-04-25 18:22:00.000000000 +0200
-***************
-*** 119,130 ****
-                          hash_number(tmp,3)) 
-  */
-  
-  #define HASHNUMBER3(t)\
-! FINISH(COMBINE(START(((MachineWord*)t)[0]), ((MachineWord*)t)[2]))
-  
-  #define HASHNUMBER4(t)\
-! FINISH(COMBINE(COMBINE(START(((MachineWord*)t)[0]), \
-! 		       ((MachineWord*)t)[2]),((MachineWord*)t)[3]))
-  
-  #define HASHINT(val) \
-  FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), val))
---- 119,171 ----
-                          hash_number(tmp,3)) 
-  */
-  
-+ /* The ATerm library use some heavy aliasing.  For instance, the
-+    various ATermXXX structures are referenced through MachineWord
-+    arrays.  This is not generally allowed by the C standard --- see
-+    C99, section 6.5, clause 7.  In particular, this means that you
-+    cannot assign something through an ATermXXX pointer, e.g.,
-+ 
-+      protoAppl->header = header;
-+ 
-+    and then read it through a MachineWord*, e.g.,
-+ 
-+      hnr = hash_number((ATerm) protoAppl, 2);
-+ 
-+    (hash_number walks over the term by casting it to a MachineWord*).
-+ 
-+    However, the same clause of the C standard also specifies that you
-+    *can* read the memory location through a union type that contains
-+    both the original type (e.g. ATermAppl) and the type used to read
-+    the memory location (e.g. MachineWord).  That's what we do
-+    below: we have a union of all the types that occur in the various
-+    ATerm types.  We then read the "w" element of the union.  The
-+    compiler is not allowed to assume absence of aliasing with the
-+    other types in the union.
-+ 
-+    A better solution would be to hash the term through a character
-+    pointer (since *any* memory location can be legally read as a
-+    character), but I'm too lazy right now.  Performance might also
-+    suffer if we do that. */
-+ 
-+ typedef union 
-+ {
-+     MachineWord w;
-+     header_type header;
-+     ATerm term;
-+     ATermList list;
-+     int i;
-+     double d;
-+     void* p;
-+ } Aliaser;
-+ 
-+ #define GET_WORD(t, n) (((Aliaser*) (((MachineWord*) t) + n))->w)
-+ 
-  #define HASHNUMBER3(t)\
-! FINISH(COMBINE(START(GET_WORD(t, 0)), GET_WORD(t, 2)))
-  
-  #define HASHNUMBER4(t)\
-! FINISH(COMBINE(COMBINE(START(GET_WORD(t, 0)), \
-! 		       GET_WORD(t, 2)), GET_WORD(t, 3)))
-  
-  #define HASHINT(val) \
-  FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), val))
-***************
-*** 132,144 ****
-  
-  #endif /* HASHPEM */
-  
-! #define PROTO_APPL_ARGS ((ATerm *) (protoTerm + ARG_OFFSET))
-  
-  #define SET_PROTO_APPL_ARG(i, a) \
-!   (PROTO_APPL_ARGS[(i)] = (a))
-  
-  #define GET_PROTO_APPL_ARG(i) \
-!   (PROTO_APPL_ARGS[(i)])
-  
-  #define CHECK_TERM(t) \
-    assert((t) != NULL \
---- 173,185 ----
-  
-  #endif /* HASHPEM */
-  
-! #define PROTO_APPL_ARGS (protoTerm + ARG_OFFSET)
-  
-  #define SET_PROTO_APPL_ARG(i, a) \
-!   (PROTO_APPL_ARGS[(i)] = (MachineWord) (a))
-  
-  #define GET_PROTO_APPL_ARG(i) \
-!   ((ATerm) PROTO_APPL_ARGS[(i)])
-  
-  #define CHECK_TERM(t) \
-    assert((t) != NULL \
-***************
-*** 323,336 ****
-  #else
-  static HashNumber hash_number(ATerm t, int size)
-  {
--   MachineWord *words = (MachineWord *) t;
-    int i;
-    HashNumber hnr;
-  
-!   hnr = START(HIDE_AGE_MARK(words[0]));
-    
-    for (i=2; i<size; i++) {
-!     hnr = COMBINE(hnr, words[i]);
-    }
-  
-    return FINISH(hnr);
---- 364,376 ----
-  #else
-  static HashNumber hash_number(ATerm t, int size)
-  {
-    int i;
-    HashNumber hnr;
-  
-!   hnr = START(HIDE_AGE_MARK(GET_WORD(t, 0)));
-    
-    for (i=2; i<size; i++) {
-!     hnr = COMBINE(hnr, GET_WORD(t, i));
-    }
-  
-    return FINISH(hnr);
-***************
-*** 338,351 ****
-  
-  static HashNumber hash_number_anno(ATerm t, int size, ATerm anno)
-  {
--   MachineWord *words = (MachineWord *) t;
-    int i;
-    HashNumber hnr;
-  
-!   hnr = START(HIDE_AGE_MARK(words[0]));
-    
-    for (i=2; i<size; i++) {
-!     hnr = COMBINE(hnr, words[i]);
-    }
-    hnr = COMBINE(hnr, (MachineWord)anno);
-  
---- 378,390 ----
-  
-  static HashNumber hash_number_anno(ATerm t, int size, ATerm anno)
-  {
-    int i;
-    HashNumber hnr;
-  
-!   hnr = START(HIDE_AGE_MARK(GET_WORD(t, 0)));
-    
-    for (i=2; i<size; i++) {
-!     hnr = COMBINE(hnr, GET_WORD(t, i));
-    }
-    hnr = COMBINE(hnr, (MachineWord)anno);
-  
-***************
-*** 1639,1645 ****
-    protoAppl->header = header;
-    CHECK_HEADER(protoAppl->header);
-  
-!   if (args != PROTO_APPL_ARGS) {
-      for (i=0; i<arity; i++) {
-        CHECK_TERM(args[i]);
-        SET_PROTO_APPL_ARG(i, args[i]);
---- 1678,1684 ----
-    protoAppl->header = header;
-    CHECK_HEADER(protoAppl->header);
-  
-!   if (args != (ATerm *) PROTO_APPL_ARGS) {
-      for (i=0; i<arity; i++) {
-        CHECK_TERM(args[i]);
-        SET_PROTO_APPL_ARG(i, args[i]);
-***************
-*** 1680,1686 ****
-      hashtable[hnr] = cur;
-    }
-  
-!   if (args != PROTO_APPL_ARGS) {
-      for (i=0; i<arity; i++) {
-        protected_buffer[i] = NULL;
-      }
---- 1719,1725 ----
-      hashtable[hnr] = cur;
-    }
-  
-!   if (args != (ATerm *) PROTO_APPL_ARGS) {
-      for (i=0; i<arity; i++) {
-        protected_buffer[i] = NULL;
-      }
-***************
-*** 2144,2150 ****
-    }
-    SET_PROTO_APPL_ARG(n, arg);
-  
-!   result = ATmakeApplArray(sym, PROTO_APPL_ARGS);
-    annos = AT_getAnnotations((ATerm)appl);
-    if (annos != NULL) {
-      result = (ATermAppl)AT_setAnnotations((ATerm)result, annos);
---- 2183,2189 ----
-    }
-    SET_PROTO_APPL_ARG(n, arg);
-  
-!   result = ATmakeApplArray(sym, (ATerm *) PROTO_APPL_ARGS);
-    annos = AT_getAnnotations((ATerm)appl);
-    if (annos != NULL) {
-      result = (ATermAppl)AT_setAnnotations((ATerm)result, annos);
-- 
cgit 1.4.1