enc: fundamental encindex

* enc/{ascii,us_ascii,utf_8}.c: set encoding indexes of
  fundamental built-in encodings so that usable as well as
  allocated rb_encoding before rb_enc_init().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

-Tue Sep 15 14:49:15 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Sep 15 14:49:43 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* enc/{ascii,us_ascii,utf_8}.c: set encoding indexes of
+	  fundamental built-in encodings so that usable as well as
+	  allocated rb_encoding before rb_enc_init().
 
 	* encindex.h: separate encoding index constants from internal.h.
 

common.mk

@@ -1286,6 +1286,7 @@ dmyext.$(OBJEXT): {$(VPATH)}dmyext.c
 enc/ascii.$(OBJEXT): {$(VPATH)}config.h
 enc/ascii.$(OBJEXT): {$(VPATH)}defines.h
 enc/ascii.$(OBJEXT): {$(VPATH)}enc/ascii.c
+enc/ascii.$(OBJEXT): {$(VPATH)}encindex.h
 enc/ascii.$(OBJEXT): {$(VPATH)}missing.h
 enc/ascii.$(OBJEXT): {$(VPATH)}oniguruma.h
 enc/ascii.$(OBJEXT): {$(VPATH)}regenc.h
@@ -1314,12 +1315,14 @@ enc/unicode.$(OBJEXT): {$(VPATH)}subst.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}config.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}defines.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}enc/us_ascii.c
+enc/us_ascii.$(OBJEXT): {$(VPATH)}encindex.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}missing.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}oniguruma.h
 enc/us_ascii.$(OBJEXT): {$(VPATH)}regenc.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}config.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}defines.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}enc/utf_8.c
+enc/utf_8.$(OBJEXT): {$(VPATH)}encindex.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}missing.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}oniguruma.h
 enc/utf_8.$(OBJEXT): {$(VPATH)}regenc.h

enc/ascii.c

@@ -29,6 +29,10 @@
  */
 
 #include "regenc.h"
+#include "encindex.h"
+#ifndef ENCINDEX_ASCII
+#define ENCINDEX_ASCII 0
+#endif
 
 OnigEncodingDefine(ascii, ASCII) = {
   onigenc_single_byte_mbc_enc_len,
@@ -47,7 +51,7 @@ OnigEncodingDefine(ascii, ASCII) = {
   onigenc_not_support_get_ctype_code_range,
   onigenc_single_byte_left_adjust_char_head,
   onigenc_always_true_is_allowed_reverse_match,
-  0,
+  ENCINDEX_ASCII,
   ONIGENC_FLAG_NONE,
 };
 ENC_ALIAS("BINARY", "ASCII-8BIT")

enc/us_ascii.c

 #include "regenc.h"
+#include "encindex.h"
+#ifndef ENCINDEX_US_ASCII
+#define ENCINDEX_US_ASCII 0
+#endif
 
 static int
 us_ascii_mbc_enc_len(const UChar* p, const UChar* e, OnigEncoding enc)
@@ -25,7 +29,7 @@ OnigEncodingDefine(us_ascii, US_ASCII) = {
   onigenc_not_support_get_ctype_code_range,
   onigenc_single_byte_left_adjust_char_head,
   onigenc_always_true_is_allowed_reverse_match,
-  0,
+  ENCINDEX_US_ASCII,
   ONIGENC_FLAG_NONE,
 };
 ENC_ALIAS("ASCII", "US-ASCII")

enc/utf_8.c

@@ -28,6 +28,10 @@
  */
 
 #include "regenc.h"
+#include "encindex.h"
+#ifndef ENCINDEX_UTF_8
+#define ENCINDEX_UTF_8 0
+#endif
 
 #define USE_INVALID_CODE_SCHEME
 
@@ -424,7 +428,7 @@ OnigEncodingDefine(utf_8, UTF_8) = {
   get_ctype_code_range,
   left_adjust_char_head,
   onigenc_always_true_is_allowed_reverse_match,
-  0,
+  ENCINDEX_UTF_8,
   ONIGENC_FLAG_UNICODE,
 };
 ENC_ALIAS("CP65001", "UTF-8")