forked from lix-project/lix
225 lines
6.1 KiB
Diff
225 lines
6.1 KiB
Diff
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);
|