add mruby sources

1 files changed, 255 insertions, 0 deletions

diff --git a/src/symbol.c b/src/symbol.c
new file mode 100644
index 000000000..ad3400834
--- /dev/null
+++ b/src/symbol.c
@@ -0,0 +1,255 @@
+#include "mruby.h"
+#include "ritehash.h"
+#include <string.h>
+
+#include <stdarg.h>
+#include <string.h>
+#include "mruby/string.h"
+#include <ctype.h>
+#include "mruby/class.h"
+#include "variable.h"
+#include <stdio.h>
+
+#ifdef INCLUDE_REGEXP
+#include "re.h"
+#include "regex.h"
+#include "st.h"
+#endif
+
+/* ------------------------------------------------------ */
+KHASH_MAP_INIT_INT(s2n, const char*);
+KHASH_MAP_INIT_STR(n2s, mrb_sym);
+/* ------------------------------------------------------ */
+mrb_sym
+mrb_intern(mrb_state *mrb, const char *name)
+{
+  khash_t(n2s) *h = mrb->name2sym;
+  khash_t(s2n) *rh = mrb->sym2name;
+  khiter_t k;
+  int r;
+  size_t len;
+  char *p;
+  mrb_sym sym;
+
+  k = kh_get(n2s, h, name);
+  if (k != kh_end(h))
+    return kh_value(h, k);
+
+  sym = ++mrb->symidx;
+  len = strlen(name);
+  p = mrb_malloc(mrb, len+1);
+  memcpy(p, name, len);
+  p[len] = 0;
+  k = kh_put(n2s, h, p, &r);
+  kh_value(h, k) = sym;
+
+  k = kh_put(s2n, rh, sym, &r);
+  kh_value(rh, k) = p;
+
+  return sym;
+}
+
+const char*
+mrb_sym2name(mrb_state *mrb, mrb_sym sym)
+{
+  khash_t(s2n) *h = mrb->sym2name;
+  khiter_t k;
+
+  k = kh_get(s2n, h, sym);
+  if (k == kh_end(h)) {
+    return NULL;                /* missing */
+  }
+  return kh_value(h, k);
+}
+
+void
+mrb_free_symtbls(mrb_state *mrb)
+{
+  khash_t(s2n) *h = mrb->sym2name;
+  khiter_t k;
+
+  for (k = kh_begin(h); k != kh_end(h); ++k)
+    if (kh_exist(h, k)) mrb_free(mrb, (char*)kh_value(h, k));
+  kh_destroy(s2n,mrb->sym2name);
+  kh_destroy(n2s,mrb->name2sym);
+}
+
+void
+mrb_init_symtbl(mrb_state *mrb)
+{
+  mrb->name2sym = kh_init(n2s, mrb);
+  mrb->sym2name = kh_init(s2n, mrb);
+}
+
+/**********************************************************************
+ * Document-class: Symbol
+ *
+ *  <code>Symbol</code> objects represent names and some strings
+ *  inside the Ruby
+ *  interpreter. They are generated using the <code>:name</code> and
+ *  <code>:"string"</code> literals
+ *  syntax, and by the various <code>to_sym</code> methods. The same
+ *  <code>Symbol</code> object will be created for a given name or string
+ *  for the duration of a program's execution, regardless of the context
+ *  or meaning of that name. Thus if <code>Fred</code> is a constant in
+ *  one context, a method in another, and a class in a third, the
+ *  <code>Symbol</code> <code>:Fred</code> will be the same object in
+ *  all three contexts.
+ *
+ *     module One
+ *       class Fred
+ *       end
+ *       $f1 = :Fred
+ *     end
+ *     module Two
+ *       Fred = 1
+ *       $f2 = :Fred
+ *     end
+ *     def Fred()
+ *     end
+ *     $f3 = :Fred
+ *     $f1.object_id   #=> 2514190
+ *     $f2.object_id   #=> 2514190
+ *     $f3.object_id   #=> 2514190
+ *
+ */
+
+
+/* 15.2.11.3.1  */
+/*
+ *  call-seq:
+ *     sym == obj   -> true or false
+ *
+ *  Equality---If <i>sym</i> and <i>obj</i> are exactly the same
+ *  symbol, returns <code>true</code>.
+ */
+
+static mrb_value
+sym_equal(mrb_state *mrb, mrb_value sym1)
+{
+  mrb_value sym2;
+
+  mrb_get_args(mrb, "o", &sym2);
+  if (mrb_obj_equal(mrb, sym1, sym2)) return mrb_true_value();
+    return mrb_false_value();
+}
+
+/* 15.2.11.3.2  */
+/* 15.2.11.3.3  */
+/*
+ *  call-seq:
+ *     sym.id2name   -> string
+ *     sym.to_s      -> string
+ *
+ *  Returns the name or string corresponding to <i>sym</i>.
+ *
+ *     :fred.id2name   #=> "fred"
+ */
+mrb_value
+mrb_sym_to_s(mrb_state *mrb, mrb_value sym)
+{
+  mrb_sym id = SYM2ID(sym);
+
+#ifdef INCLUDE_REGEXP
+  //return str_new3(mrb_cString, mrb_id2str(id));
+  return str_new3(mrb, mrb_obj_class(mrb, sym), mrb_str_new_cstr(mrb, mrb_sym2name(mrb, id)));
+#else
+  return mrb_str_new_cstr(mrb, mrb_sym2name(mrb, id)); //mrb_str_new2(mrb_id2name(SYM2ID(sym)));
+#endif
+
+}
+
+/* 15.2.11.3.4  */
+/*
+ * call-seq:
+ *   sym.to_sym   -> sym
+ *   sym.intern   -> sym
+ *
+ * In general, <code>to_sym</code> returns the <code>Symbol</code> corresponding
+ * to an object. As <i>sym</i> is already a symbol, <code>self</code> is returned
+ * in this case.
+ */
+
+static mrb_value
+sym_to_sym(mrb_state *mrb, mrb_value sym)
+{
+    return sym;
+}
+
+/* 15.2.11.3.5(x)  */
+/*
+ *  call-seq:
+ *     sym.inspect    -> string
+ *
+ *  Returns the representation of <i>sym</i> as a symbol literal.
+ *
+ *     :fred.inspect   #=> ":fred"
+ */
+
+static mrb_value
+sym_inspect(mrb_state *mrb, mrb_value sym)
+{
+#ifdef INCLUDE_ENCODING
+  #define STR_ENC_GET(mrb, str) mrb_enc_from_index(mrb, ENCODING_GET(mrb, str))
+  mrb_value str;
+  mrb_sym id = SYM2ID(sym);
+  mrb_encoding *enc;
+  const char *ptr;
+  long len;
+  char *dest;
+  mrb_encoding *resenc = mrb_default_internal_encoding(mrb);
+
+  if (resenc == NULL) resenc = mrb_default_external_encoding(mrb);
+  sym = mrb_str_new_cstr(mrb, mrb_sym2name(mrb, id));//mrb_id2str(id);
+  enc = STR_ENC_GET(mrb, sym);
+  ptr = RSTRING_PTR(sym);
+  len = RSTRING_LEN(sym);
+  if ((resenc != enc && !mrb_str_is_ascii_only_p(mrb, sym)) || len != (long)strlen(ptr) ||
+    !mrb_enc_symname_p(ptr, enc) || !sym_printable(mrb, ptr, ptr + len, enc)) {
+    str = mrb_str_inspect(mrb, sym);
+    len = RSTRING_LEN(str);
+    mrb_str_resize(mrb, str, len + 1);
+    dest = RSTRING_PTR(str);
+    memmove(dest + 1, dest, len);
+    dest[0] = ':';
+  }
+  else {
+    char *dest;
+    str = mrb_enc_str_new(mrb, 0, len + 1, enc);
+    dest = RSTRING_PTR(str);
+    dest[0] = ':';
+    memcpy(dest + 1, ptr, len);
+  }
+  return str;
+#else
+  mrb_value str;
+  const char *name;
+  mrb_sym id = SYM2ID(sym);
+
+  name = mrb_sym2name(mrb, id); //mrb_id2name(id);
+  str = mrb_str_new(mrb, 0, strlen(name)+1);
+  RSTRING(str)->buf[0] = ':';
+  strcpy(RSTRING(str)->buf+1, name);
+  if (!mrb_symname_p(name)) {
+    str = mrb_str_dump(mrb, str);
+    strncpy(RSTRING(str)->buf, ":\"", 2);
+  }
+  return str;
+#endif
+}
+
+
+void
+mrb_init_symbols(mrb_state *mrb)
+{
+  struct RClass *sym;
+
+  sym = mrb->symbol_class = mrb_define_class(mrb, "Symbol", mrb->object_class);
+
+  mrb_define_method(mrb, sym, "===",             sym_equal,               ARGS_REQ(1));              /* 15.2.11.3.1  */
+  mrb_define_method(mrb, sym, "id2name",         mrb_sym_to_s,            ARGS_NONE());              /* 15.2.11.3.2  */
+  mrb_define_method(mrb, sym, "to_s",            mrb_sym_to_s,            ARGS_NONE());              /* 15.2.11.3.3  */
+  mrb_define_method(mrb, sym, "to_sym",          sym_to_sym,              ARGS_NONE());              /* 15.2.11.3.4  */
+
+  mrb_define_method(mrb, sym, "inspect",         sym_inspect,             ARGS_NONE());              /* 15.2.11.3.5(x)  */
+}