1 files changed, 22 insertions, 6 deletions
diff --git a/src/string.c b/src/string.c
index 30fe7c9ca..205c39876 100644
--- a/src/string.c
+++ b/src/string.c
@@ -14,6 +14,7 @@
 #include "mruby/range.h"
 #include "mruby/array.h"
 #include "mruby/class.h"
+#include "mruby/numeric.h"
 #include <stdio.h>
 #include "re.h"
 
@@ -2540,9 +2541,16 @@ mrb_str_dump(mrb_state *mrb, mrb_value str)
           *q++ = c;
       }
       else {
-          *q++ = '\\';
-          sprintf(q, "%03o", c&0xff);
-          q += 3;
+        mrb_value octstr;
+        mrb_value chr;
+        const char *ptr;
+        int len;
+        chr = mrb_fixnum_value(c & 0xff);
+        octstr = mrb_fix2str(mrb, chr, 8);
+        ptr = mrb_str_body(octstr, &len);
+        memcpy(q, "\\000", 4);
+        memcpy(q + 4 - len, ptr, len);
+        q += 4;
       }
     }
     *q++ = '"';
@@ -2625,9 +2633,17 @@ mrb_str_inspect(mrb_state *mrb, mrb_value str)
           continue;
       }
       else {
-	int n = sprintf(buf, "\\%03o", c & 0377);
-	mrb_str_buf_cat(mrb, result, buf, n);
-          continue;
+        mrb_value octstr;
+        mrb_value chr;
+        const char *ptr;
+        int len;
+        chr = mrb_fixnum_value(c & 0xff);
+        octstr = mrb_fix2str(mrb, chr, 8);
+        ptr = mrb_str_body(octstr, &len);
+        memcpy(buf, "\\000", 4);
+        memcpy(buf + 4 - len, ptr, len);
+        mrb_str_buf_cat(mrb, result, buf, 4);
+        continue;
       }
     }
     mrb_str_buf_cat(mrb, result, "\"", 1);