build fix: several missing symbols needed for backport

.gitignore

@@ -6,6 +6,8 @@ ripper.o
 ripper.y
 ripper.c
 ripper.E
+ripper.so
+ripper.dll
 ripper.bundle
 ids1
 ids2

ext/backports/ruby/encoding.h

@@ -22,7 +22,8 @@ typedef struct rb_encoding_s {
 
 static rb_encoding __default_encoding_s = {1, 1, "default"};
 static rb_encoding *__default_encoding = &__default_encoding_s;
-int rb_char_to_option_kcode(int c, int *option, int *kcode) { return 0; }
+int rb_char_to_option_kcode(int c, int *option, int *kcode) { *option=0; *kcode=-1; return 0; }
+int __default_rb_enc_mbcput(int c, char *p, rb_encoding *enc) { do *p++ = (char) (c & 0xff); while (c >> 8); return c; }
 
 #define ENC_CODERANGE_7BIT 0
 #define ENC_CODERANGE_UNKNOWN -1
@@ -38,6 +39,8 @@ int rb_char_to_option_kcode(int c, int *option, int *kcode) { return 0; }
 #define rb_enc_mbminlen(enc) (enc)->min_enc_len
 #define rb_enc_mbmaxlen(enc) (enc)->max_enc_len
 #define rb_enc_mbclen(p,e,enc) 1
+#define rb_enc_codelen(c,enc)  (((c) & 0xffffff00) ? ((c) & 0xffff0000) ? ((c) & 0xff000000) ? 4 : 3 : 2 : 1)
+#define rb_enc_mbcput(c,p,enc) __default_rb_enc_mbcput(c,(void*)p,enc)
 #define rb_enc_fast_mbclen(p,e,enc) 1
 #define rb_enc_isascii(c,enc) isascii(c)
 #define rb_enc_isalpha(c,enc) isalpha(c)
@@ -54,6 +57,7 @@ int rb_char_to_option_kcode(int c, int *option, int *kcode) { return 0; }
 #define rb_enc_from_encoding(e) Qnil
 #define rb_enc_precise_mbclen(s,l,e) 1
 #define rb_enc_unicode_p(e) 0
+#define rb_ascii8bit_encindex(e) 1
 #define rb_ascii8bit_encoding() __default_encoding
 #define rb_utf8_encoding() __default_encoding
 #define rb_usascii_encoding() __default_encoding

ext/parse.y

@@ -28,6 +28,18 @@
 
 #define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))
 
+#ifdef RIPPER
+
+#define YYMALLOC(size)		xmalloc(size)
+#define YYREALLOC(ptr, size)	xrealloc(ptr, size)
+#define YYCALLOC(nelem, size)	xcalloc(nelem, size)
+#define YYFREE(ptr)		xfree(ptr)
+#define malloc	YYMALLOC
+#define realloc	YYREALLOC
+#define calloc	YYCALLOC
+#define free	YYFREE
+
+#else
 #define YYMALLOC(size)		rb_parser_malloc(parser, size)
 #define YYREALLOC(ptr, size)	rb_parser_realloc(parser, ptr, size)
 #define YYCALLOC(nelem, size)	rb_parser_calloc(parser, nelem, size)
@@ -37,7 +49,6 @@
 #define calloc	YYCALLOC
 #define free	YYFREE
 
-#ifndef RIPPER
 static ID register_symid(ID, const char *, long, rb_encoding *);
 #define REGISTER_SYMID(id, name) register_symid(id, name, strlen(name), enc)
 #include "id.c"
@@ -270,6 +281,9 @@ struct parser_params {
 #define STR_NEW3(p,n,e,func) parser_str_new((p),(n),(e),(func),parser->enc)
 #define ENC_SINGLE(cr) ((cr)==ENC_CODERANGE_7BIT)
 #define TOK_INTERN(mb) rb_intern3(tok(), toklen(), parser->enc)
+#ifdef RIPPER
+#define rb_str_new_cstr	rb_str_new2
+#endif
 
 #ifdef YYMALLOC
 void *rb_parser_malloc(struct parser_params *, size_t);