use size_t for string length C API

2 files changed, 3 insertions, 3 deletions

diff --git a/include/mruby.h b/include/mruby.h
index 6d7be7616..018a6a678 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -202,7 +202,7 @@ void *mrb_realloc(mrb_state*, void*, size_t);
 struct RBasic *mrb_obj_alloc(mrb_state*, enum mrb_vtype, struct RClass*);
 void *mrb_free(mrb_state*, void*);
 
-mrb_value mrb_str_new(mrb_state *mrb, const char *p, int len); /* mrb_str_new */
+mrb_value mrb_str_new(mrb_state *mrb, const char *p, size_t len);
 mrb_value mrb_str_new_cstr(mrb_state*, const char*);
 
 mrb_state* mrb_open(void);
diff --git a/include/mruby/string.h b/include/mruby/string.h
index 2fc748474..613c6c6a7 100644
--- a/include/mruby/string.h
+++ b/include/mruby/string.h
@@ -46,10 +46,10 @@ mrb_value mrb_str_plus(mrb_state*, mrb_value, mrb_value);
 mrb_value mrb_obj_as_string(mrb_state *mrb, mrb_value obj);
 mrb_value mrb_str_resize(mrb_state *mrb, mrb_value str, int len); /* mrb_str_resize */
 mrb_value mrb_string_value(mrb_state *mrb, mrb_value *ptr); /* StringValue */
-mrb_value mrb_str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, int len);
+mrb_value mrb_str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len);
 mrb_value mrb_check_string_type(mrb_state *mrb, mrb_value str);
 mrb_value mrb_str_buf_new(mrb_state *mrb, int capa);
-mrb_value mrb_str_buf_cat(mrb_state *mrb, mrb_value str, const char *ptr, int len);
+mrb_value mrb_str_buf_cat(mrb_state *mrb, mrb_value str, const char *ptr, size_t len);
 
 char *mrb_string_value_cstr(mrb_state *mrb, mrb_value *ptr);
 char *mrb_string_value_ptr(mrb_state *mrb, mrb_value ptr);