Merge pull request #2059 from cremno/reduce-rstring_ptr-usage

reduce RSTRING_PTR usage

3 files changed, 13 insertions, 8 deletions

diff --git a/src/kernel.c b/src/kernel.c
index 15a80f7c4..3b1ad863f 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -573,8 +573,10 @@ get_valid_iv_sym(mrb_state *mrb, mrb_value iv_name)
   mrb_assert(mrb_symbol_p(iv_name) || mrb_string_p(iv_name));
 
   if (mrb_string_p(iv_name)) {
-    iv_name_id = mrb_intern(mrb, RSTRING_PTR(iv_name), RSTRING_LEN(iv_name));
-    valid_iv_name(mrb, iv_name_id, RSTRING_PTR(iv_name), RSTRING_LEN(iv_name));
+    char *p = RSTRING_PTR(iv_name);
+    mrb_int l = RSTRING_LEN(iv_name);
+    iv_name_id = mrb_intern(mrb, p, l);
+    valid_iv_name(mrb, iv_name_id, p, l);
   }
   else {
     iv_name_id = mrb_symbol(iv_name);
diff --git a/src/symbol.c b/src/symbol.c
index 7206778d6..1b106ad98 100644
--- a/src/symbol.c
+++ b/src/symbol.c
@@ -394,15 +394,17 @@ sym_inspect(mrb_state *mrb, mrb_value sym)
   const char *name;
   mrb_int len;
   mrb_sym id = mrb_symbol(sym);
+  char *sp;
 
   name = mrb_sym2name_len(mrb, id, &len);
   str = mrb_str_new(mrb, 0, len+1);
-  RSTRING_PTR(str)[0] = ':';
-  memcpy(RSTRING_PTR(str)+1, name, len);
+  sp = RSTRING_PTR(str);
+  sp[0] = ':';
+  memcpy(sp+1, name, len);
   if (!symname_p(name) || strlen(name) != len) {
     str = mrb_str_dump(mrb, str);
-    RSTRING_PTR(str)[0] = ':';
-    RSTRING_PTR(str)[1] = '"';
+    sp[0] = ':';
+    sp[1] = '"';
   }
   return str;
 }
diff --git a/src/variable.c b/src/variable.c
index 3dcdbf775..90f0831da 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -563,10 +563,11 @@ inspect_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
   const char *s;
   mrb_int len;
   mrb_value ins;
+  char *sp = RSTRING_PTR(str);
 
   /* need not to show internal data */
-  if (RSTRING_PTR(str)[0] == '-') { /* first element */
-    RSTRING_PTR(str)[0] = '#';
+  if (sp[0] == '-') { /* first element */
+    sp[0] = '#';
     mrb_str_cat_lit(mrb, str, " ");
   }
   else {