Make type of `pc` arguments in `debug.c` consistent; close #5218

They used to be `size_t`, `uint32_t` and `ptrdiff_t`. Now all of them
made to be `uint32_t`.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/debug.c b/src/debug.c
index dabc5a56d..2f9320ac9 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -51,12 +51,12 @@ select_line_type(const uint16_t *lines, size_t lines_len)
 }
 
 MRB_API char const*
-mrb_debug_get_filename(mrb_state *mrb, const mrb_irep *irep, ptrdiff_t pc)
+mrb_debug_get_filename(mrb_state *mrb, const mrb_irep *irep, uint32_t pc)
 {
-  if (irep && pc >= 0 && pc < irep->ilen) {
+  if (irep && pc < irep->ilen) {
     mrb_irep_debug_info_file* f = NULL;
     if (!irep->debug_info) return NULL;
-    else if ((f = get_file(irep->debug_info, (uint32_t)pc))) {
+    else if ((f = get_file(irep->debug_info, pc))) {
       return mrb_sym_name_len(mrb, f->filename_sym, NULL);
     }
   }
@@ -64,14 +64,14 @@ mrb_debug_get_filename(mrb_state *mrb, const mrb_irep *irep, ptrdiff_t pc)
 }
 
 MRB_API int32_t
-mrb_debug_get_line(mrb_state *mrb, const mrb_irep *irep, size_t pc)
+mrb_debug_get_line(mrb_state *mrb, const mrb_irep *irep, uint32_t pc)
 {
   if (irep && pc >= 0 && pc < irep->ilen) {
     mrb_irep_debug_info_file* f = NULL;
     if (!irep->debug_info) {
       return -1;
     }
-    else if ((f = get_file(irep->debug_info, (uint32_t)pc))) {
+    else if ((f = get_file(irep->debug_info, pc))) {
       switch (f->line_type) {
         case mrb_debug_line_ary:
           mrb_assert(f->start_pos <= pc && pc < (f->start_pos + f->line_entry_count));