Built generator for an variable amount of gems

1 files changed, 56 insertions, 0 deletions

diff --git a/mrbgems/g/md5_zwo/src/mrb_md5.c b/mrbgems/g/md5_zwo/src/mrb_md5.c
new file mode 100644
index 000000000..6df453b0e
--- /dev/null
+++ b/mrbgems/g/md5_zwo/src/mrb_md5.c
@@ -0,0 +1,56 @@
+#include <mruby.h>
+#include <mruby/string.h>
+#include "md5.h"
+
+static struct RClass *_class_md5;
+
+/*********************************************************
+ * main
+ *********************************************************/
+
+static char
+nr2char(int n) {
+  if (0 <= n && n <= 9) {
+    return '0' + n;
+  } else {
+    return 'a' + n - 10;
+  }
+}
+
+static mrb_value
+mrb_md5_hex(mrb_state *mrb, mrb_value self)
+{
+  md5_state_t pms;
+  md5_byte_t digest[16];
+  md5_byte_t digest_hex[33];
+  mrb_value arg;
+  int i;
+
+  mrb_get_args(mrb, "o", &arg);
+  if (mrb_nil_p(arg) || mrb_type(arg) != MRB_TT_STRING) {
+    mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid argument");
+  }
+
+  md5_init(&pms);
+  md5_append(&pms, (const md5_byte_t*) RSTRING_PTR(arg), RSTRING_CAPA(arg));
+  md5_finish(&pms, digest);
+
+
+  for (i = 0; i < 16; i++) {
+    digest_hex[i*2+0] = nr2char((digest[i] >> 4) & 0xf);
+    digest_hex[i*2+1] = nr2char(digest[i] & 0x0f);
+  }
+  digest_hex[32] = 0;
+
+  return mrb_str_new(mrb, (char*) digest_hex, 32);
+}
+
+/*********************************************************
+ * register
+ *********************************************************/
+
+void
+mrb_md5_gem_init(mrb_state* mrb) {
+  _class_md5 = mrb_define_module(mrb, "MD5");
+  mrb_define_class_method(mrb, _class_md5, "md5_hex", mrb_md5_hex, ARGS_REQ(1));
+}