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Tentative changes to make this work better on 64-bit machines. 

A plain int that doesn't fit in 32 bits will be marshalled using a new
type.  32 bits machines can't handle this and will issue a warning.
This commit is contained in:
Guido van Rossum 1996-12-05 23:15:02 +00:00
parent 9abe64a395
commit b0c168cbe8
1 changed files with 66 additions and 3 deletions
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69
Python/marshal.c
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@ -46,6 +46,7 @@ PERFORMANCE OF THIS SOFTWARE.
#define TYPE_NONE 'N'
#define TYPE_ELLIPSIS '.'
#define TYPE_INT 'i'
#define TYPE_INT64 'I'
#define TYPE_FLOAT 'f'
#define TYPE_COMPLEX 'x'
#define TYPE_LONG 'l'
@ -126,6 +127,18 @@ w_long(x, p)
w_byte((int)((x>>24) & 0xff), p);
}
static void
w_long64(x, p)
long x;
WFILE *p;
{
w_long(x, p);
w_byte((int)((x>>32) & 0xff), p);
w_byte((int)((x>>40) & 0xff), p);
w_byte((int)((x>>48) & 0xff), p);
w_byte((int)((x>>56) & 0xff), p);
}
static void
w_object(v, p)
object *v;
@ -140,8 +153,16 @@ w_object(v, p)
else if (v == Py_Ellipsis)
w_byte(TYPE_ELLIPSIS, p);
else if (is_intobject(v)) {
w_byte(TYPE_INT, p);
w_long(getintvalue(v), p);
long x = GETINTVALUE((intobject *)v);
long y = x>>31;
if (y && y != -1) {
w_byte(TYPE_INT64, p);
w_long64(x, p);
}
else {
w_byte(TYPE_INT, p);
w_long(x, p);
}
}
else if (is_longobject(v)) {
longobject *ob = (longobject *)v;
@ -307,7 +328,46 @@ r_long(p)
x |= (long)rs_byte(p) << 16;
x |= (long)rs_byte(p) << 24;
}
/* XXX If your long is > 32 bits, add sign-extension here!!! */
/* Sign extension for 64-bit machines */
x <<= (8*sizeof(long) - 32);
x >>= (8*sizeof(long) - 32);
return x;
}
static long
r_long64(p)
RFILE *p;
{
register long x;
register FILE *fp = p->fp;
if (sizeof(long) < 8) {
object *f = sysget("stderr");
err_clear();
if (f != NULL) {
writestring(
"Warning: un-marshal 64-bit int in 32-bit mode\n", f);
}
}
if (fp) {
x = getc(fp);
x |= (long)getc(fp) << 8;
x |= (long)getc(fp) << 16;
x |= (long)getc(fp) << 24;
x |= (long)getc(fp) << 32;
x |= (long)getc(fp) << 40;
x |= (long)getc(fp) << 48;
x |= (long)getc(fp) << 56;
}
else {
x = rs_byte(p);
x |= (long)rs_byte(p) << 8;
x |= (long)rs_byte(p) << 16;
x |= (long)rs_byte(p) << 24;
x |= (long)rs_byte(p) << 32;
x |= (long)rs_byte(p) << 40;
x |= (long)rs_byte(p) << 48;
x |= (long)rs_byte(p) << 56;
}
return x;
}
@ -339,6 +399,9 @@ r_object(p)
case TYPE_INT:
return newintobject(r_long(p));
case TYPE_INT64:
return newintobject(r_long64(p));
case TYPE_LONG:
{
int size;