static void sweepref(fz_obj *obj)
{
int num = fz_to_num(obj);
int gen = fz_to_gen(obj);
if (num < 0 || num >= xref->len)
return;
if (uselist[num])
return;
uselist[num] = 1;
/* Bake in /Length in stream objects */
fz_try(ctx)
{
if (pdf_is_stream(xref, num, gen))
{
fz_obj *len = fz_dict_gets(obj, "Length");
if (fz_is_indirect(len))
{
uselist[fz_to_num(len)] = 0;
len = fz_resolve_indirect(len);
fz_dict_puts(obj, "Length", len);
}
}
}
fz_catch(ctx)
{
/* Leave broken */
}
sweepobj(fz_resolve_indirect(obj));
}
static void removeduplicateobjs(void)
{
int num, other;
for (num = 1; num < xref->len; num++)
{
/* Only compare an object to objects preceding it */
for (other = 1; other < num; other++)
{
fz_obj *a, *b;
if (num == other || !uselist[num] || !uselist[other])
continue;
/*
* Comparing stream objects data contents would take too long.
*
* pdf_is_stream calls pdf_cache_object and ensures
* that the xref table has the objects loaded.
*/
fz_try(ctx)
{
if (pdf_is_stream(xref, num, 0) || pdf_is_stream(xref, other, 0))
continue;
}
fz_catch(ctx)
{
/* Assume different */
}
a = xref->table[num].obj;
b = xref->table[other].obj;
a = fz_resolve_indirect(a);
b = fz_resolve_indirect(b);
if (fz_objcmp(a, b))
continue;
/* Keep the lowest numbered object */
renumbermap[num] = MIN(num, other);
renumbermap[other] = MIN(num, other);
uselist[MAX(num, other)] = 0;
/* One duplicate was found, do not look for another */
break;
}
}
}
/* for use by pdf_crypt_obj_imp to decrypt AES string in place */
void fz_set_str_len(fz_context *ctx, fz_obj *obj, int newlen)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_string(ctx, obj))
if (newlen < obj->u.s.len)
obj->u.s.len = newlen;
}
char *fz_to_str_buf(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_string(ctx, obj))
return obj->u.s.buf;
return "";
}
int fz_to_str_len(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_string(ctx, obj))
return obj->u.s.len;
return 0;
}
int fz_to_bool(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_bool(ctx, obj))
return obj->u.b;
return 0;
}
char *fz_to_name(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_name(ctx, obj))
return obj->u.n;
return "";
}
float fz_to_real(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_real(ctx, obj))
return obj->u.f;
if (fz_is_int(ctx, obj))
return obj->u.i;
return 0;
}
int fz_to_int(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
if (fz_is_int(ctx, obj))
return obj->u.i;
if (fz_is_real(ctx, obj))
return (int)(obj->u.f + 0.5f); /* No roundf in MSVC */
return 0;
}
int fz_is_dict(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
return obj ? obj->kind == FZ_DICT : 0;
}
int fz_is_array(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
return obj ? obj->kind == FZ_ARRAY : 0;
}
int fz_is_name(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
return obj ? obj->kind == FZ_NAME : 0;
}
int fz_is_string(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
return obj ? obj->kind == FZ_STRING : 0;
}
int fz_is_real(fz_context *ctx, fz_obj *obj)
{
obj = fz_resolve_indirect(ctx, obj);
return obj ? obj->kind == FZ_REAL : 0;
}