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-rw-r--r--libguile/stacks.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/libguile/stacks.c b/libguile/stacks.c
index 4b3016a4f..97b1495b8 100644
--- a/libguile/stacks.c
+++ b/libguile/stacks.c
@@ -95,17 +95,17 @@ stack_depth (SCM frame)
* encountered.
*/
-static SCM*
+static scm_t_ptrdiff
find_prompt (SCM key)
{
- SCM *fp;
+ scm_t_ptrdiff fp_offset;
if (!scm_dynstack_find_prompt (&SCM_I_CURRENT_THREAD->dynstack, key,
- NULL, &fp, NULL, NULL, NULL))
+ NULL, &fp_offset, NULL, NULL, NULL))
scm_misc_error ("make-stack", "Prompt tag not found while narrowing stack",
scm_list_1 (key));
- return fp;
+ return fp_offset;
}
static void
@@ -144,9 +144,9 @@ narrow_stack (SCM stack, SCM inner_cut, SCM outer_cut)
else
{
/* Cut until the given prompt tag is seen. */
- SCM *fp = find_prompt (inner_cut);
+ scm_t_ptrdiff fp_offset = find_prompt (inner_cut);
for (; len; len--, frame = scm_frame_previous (frame))
- if (fp == SCM_VM_FRAME_FP (frame) - SCM_VM_FRAME_OFFSET (frame))
+ if (fp_offset == SCM_VM_FRAME_FP_OFFSET (frame))
break;
}
@@ -178,12 +178,12 @@ narrow_stack (SCM stack, SCM inner_cut, SCM outer_cut)
else
{
/* Cut until the given prompt tag is seen. */
- SCM *fp = find_prompt (outer_cut);
+ scm_t_ptrdiff fp_offset = find_prompt (outer_cut);
while (len)
{
frame = scm_stack_ref (stack, scm_from_long (len - 1));
len--;
- if (fp == SCM_VM_FRAME_FP (frame) - SCM_VM_FRAME_OFFSET (frame))
+ if (fp_offset == SCM_VM_FRAME_FP_OFFSET (frame))
break;
}
}