From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/ext/-test-/string/cstr.c | 57 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 jni/ruby/ext/-test-/string/cstr.c

(limited to 'jni/ruby/ext/-test-/string/cstr.c')

diff --git a/jni/ruby/ext/-test-/string/cstr.c b/jni/ruby/ext/-test-/string/cstr.c
new file mode 100644
index 0000000..ba2e46b
--- /dev/null
+++ b/jni/ruby/ext/-test-/string/cstr.c
@@ -0,0 +1,57 @@
+#include "ruby.h"
+#include "ruby/encoding.h"
+
+static VALUE
+bug_str_cstr_term(VALUE str)
+{
+    long len;
+    char *s;
+    int c;
+    rb_encoding *enc;
+
+    rb_str_modify(str);
+    len = RSTRING_LEN(str);
+    RSTRING_PTR(str)[len] = 'x';
+    s = StringValueCStr(str);
+    rb_gc();
+    enc = rb_enc_get(str);
+    c = rb_enc_codepoint(&s[len], &s[len+rb_enc_mbminlen(enc)], enc);
+    return INT2NUM(c);
+}
+
+static VALUE
+bug_str_cstr_term_char(VALUE str)
+{
+    long len;
+    char *s;
+    int c;
+    rb_encoding *enc = rb_enc_get(str);
+
+    RSTRING_GETMEM(str, s, len);
+    s += len;
+    len = rb_enc_mbminlen(enc);
+    c = rb_enc_precise_mbclen(s, s + len, enc);
+    if (!MBCLEN_CHARFOUND_P(c)) {
+	c = (unsigned char)*s;
+    }
+    else {
+	c = rb_enc_mbc_to_codepoint(s, s + len, enc);
+	if (!c) return Qnil;
+    }
+    return rb_enc_uint_chr((unsigned int)c, enc);
+}
+
+static VALUE
+bug_str_s_cstr_term_char(VALUE self, VALUE str)
+{
+    Check_Type(str, T_STRING);
+    return bug_str_cstr_term_char(str);
+}
+
+void
+Init_cstr(VALUE klass)
+{
+    rb_define_method(klass, "cstr_term", bug_str_cstr_term, 0);
+    rb_define_method(klass, "cstr_term_char", bug_str_cstr_term_char, 0);
+    rb_define_singleton_method(klass, "cstr_term_char", bug_str_s_cstr_term_char, 1);
+}
-- 
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