1 files changed, 123 insertions, 0 deletions
diff --git a/iconv/gconv_open.c b/iconv/gconv_open.c
new file mode 100644
index 0000000000..0e789df896
--- /dev/null
+++ b/iconv/gconv_open.c
@@ -0,0 +1,123 @@
+/* Find matching transformation algorithms and initialize steps.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <gconv.h>
+#include <stdlib.h>
+
+
+int
+__gconv_open (const char *toset, const char *fromset, gconv_t *handle)
+{
+  struct gconv_step *steps;
+  size_t nsteps;
+  gconv_t result = NULL;
+  size_t cnt = 0;
+  int res;
+
+  res = __gconv_find_transform (toset, fromset, &steps, &nsteps);
+  if (res == GCONV_OK)
+    {
+      /* Allocate room for handle.  */
+      result = (gconv_t) malloc (sizeof (struct gconv_info));
+      if (result == NULL)
+	res = GCONV_NOMEM;
+      else
+	{
+	  /* Remember the list of steps.  */
+	  result->steps = steps;
+	  result->nsteps = nsteps;
+
+	  /* Allocate array for the step data.  */
+	  result->data = (struct gconv_step_data *)
+	    calloc (nsteps, sizeof (struct gconv_step_data));
+
+	  if (result->data == NULL)
+	    res = GCONV_NOMEM;
+	  else
+	    {
+	      /* Call all initialization functions for the transformation
+		 step implemenations.  */
+	      struct gconv_step_data *data = result->data;
+
+	      for (cnt = 0; cnt < nsteps; ++cnt)
+		{
+		  /* If this is the last step we must not allocate an output
+		     buffer.  Signal this to the initializer.  */
+		  data[cnt].is_last = cnt == nsteps - 1;
+
+		  if (steps[cnt].init_fct != NULL)
+		    {
+		      res = (steps[cnt].init_fct) (&steps[cnt], &data[cnt]);
+		      if (res != GCONV_OK)
+			break;
+		    }
+		  else
+		    if (!data[cnt].is_last)
+		      {
+			data[cnt].outbufsize = GCONV_DEFAULT_BUFSIZE;
+			data[cnt].outbuf =
+			  (char *) malloc (data[cnt].outbufsize);
+			if (data[cnt].outbuf == NULL)
+			  {
+			    res = GCONV_NOMEM;
+			    break;
+			  }
+			data[cnt].outbufavail = 0;
+		      }
+		}
+	    }
+	}
+    }
+
+  if (res != GCONV_OK)
+    {
+      /* Something went wrong.  Free all the resources.  */
+      int serrno = errno;
+
+      if (result != NULL)
+	{
+	  if (result->data != NULL)
+	    {
+	      while (cnt-- > 0)
+		if (steps[cnt].end_fct != NULL)
+		  (*steps[cnt].end_fct) (&result->data[cnt]);
+		else
+		  {
+		    free (result->data[cnt].outbuf);
+		    if (result->data[cnt].data != NULL)
+		      free (result->data[cnt].data);
+		  }
+
+	      free (result->data);
+	    }
+
+	  free (result);
+	  result = NULL;
+	}
+
+      __gconv_close_transform (steps, nsteps);
+
+      __set_errno (serrno);
+    }
+
+  *handle = result;
+  return res;
+}