[PATCH] drop rb_str_set_len compatibility replacement

[PATCH] drop rb_str_set_len compatibility replacement

[Eric Wong]

While it is innocuous after compiling, it can be a confusing
source of errors for users with broken installations of Ruby
itself:

https://bogomips.org/unicorn-public/5ace6a20-e094-293d-93df-b557480e12d5@anyces.com/
https://bogomips.org/unicorn-public/02994a55-9c07-a3c5-f06b-a4c15551a67e@anyces.com/

rb_str_set_len has been provided since Ruby 1.8.7+, so we have
not needed it since we dropped all 1.8.x support in unicorn 5.x.
---
 ext/unicorn_http/ext_help.h | 20 --------------------
 ext/unicorn_http/extconf.rb |  2 +-
 2 files changed, 1 insertion(+), 21 deletions(-)

diff --git a/ext/unicorn_http/ext_help.h b/ext/unicorn_http/ext_help.h
index c87c272..747c36c 100644
--- a/ext/unicorn_http/ext_help.h
+++ b/ext/unicorn_http/ext_help.h
@@ -1,26 +1,6 @@
 #ifndef ext_help_h
 #define ext_help_h
 
-#ifndef RSTRING_PTR
-#define RSTRING_PTR(s) (RSTRING(s)->ptr)
-#endif /* !defined(RSTRING_PTR) */
-#ifndef RSTRING_LEN
-#define RSTRING_LEN(s) (RSTRING(s)->len)
-#endif /* !defined(RSTRING_LEN) */
-
-#ifndef HAVE_RB_STR_SET_LEN
-#  ifdef RUBINIUS
-#    error we should never get here with current Rubinius (1.x)
-#  endif
-/* this is taken from Ruby 1.8.7, 1.8.6 may not have it */
-static void rb_18_str_set_len(VALUE str, long len)
-{
-  RSTRING(str)->len = len;
-  RSTRING(str)->ptr[len] = '\0';
-}
-#  define rb_str_set_len(str,len) rb_18_str_set_len(str,len)
-#endif /* !defined(HAVE_RB_STR_SET_LEN) */
-
 /* not all Ruby implementations support frozen objects (Rubinius does not) */
 #if defined(OBJ_FROZEN)
 #  define assert_frozen(f) assert(OBJ_FROZEN(f) && "unfrozen object")
diff --git a/ext/unicorn_http/extconf.rb b/ext/unicorn_http/extconf.rb
index 1da0282..2fc60fe 100644
--- a/ext/unicorn_http/extconf.rb
+++ b/ext/unicorn_http/extconf.rb
@@ -4,7 +4,7 @@
 have_macro("SIZEOF_OFF_T", "ruby.h") or check_sizeof("off_t", "sys/types.h")
 have_macro("SIZEOF_SIZE_T", "ruby.h") or check_sizeof("size_t", "sys/types.h")
 have_macro("SIZEOF_LONG", "ruby.h") or check_sizeof("long", "sys/types.h")
-have_func("rb_str_set_len", "ruby.h")
+have_func("rb_str_set_len", "ruby.h") or abort 'Ruby 1.9.3+ required'
 have_func("rb_hash_clear", "ruby.h") # Ruby 2.0+
 have_func("gmtime_r", "time.h")
 
-- 
EW