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-rw-r--r--miscutils/dc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/miscutils/dc.c b/miscutils/dc.c
index f94d6fa..9c74172 100644
--- a/miscutils/dc.c
+++ b/miscutils/dc.c
@@ -56,6 +56,12 @@ enum { STACK_SIZE = (COMMON_BUFSIZE - offsetof(struct globals, stack)) / sizeof(
} while (0)
+static void check_under(void)
+{
+ if (pointer == 0)
+ bb_error_msg_and_die("stack underflow");
+}
+
static void push(double a)
{
if (pointer >= STACK_SIZE)
@@ -65,8 +71,7 @@ static void push(double a)
static double pop(void)
{
- if (pointer == 0)
- bb_error_msg_and_die("stack underflow");
+ check_under();
return stack[--pointer];
}
@@ -187,6 +192,7 @@ static void print_stack_no_pop(void)
static void print_no_pop(void)
{
+ check_under();
print_base(stack[pointer-1]);
}