prepare to merge with pcsc_to_picc

git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@299 96b47cad-a561-4643-ad3b-153ac7d7599c

ccid/src/pcscutil.c

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2010 Frank Morgner
+ *
+ * This file is part of ccid.
+ *
+ * ccid is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * ccid 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 General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * ccid.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "pcscutil.h"
+
+LONG
+pcsc_connect(unsigned int readernum, DWORD dwShareMode, DWORD dwPreferredProtocol,
+        SCARDCONTEXT *hContext, LPSTR *readers, LPSCARDHANDLE phCard)
+{
+    LONG r;
+    DWORD ctl, readerslen;
+    char *reader;
+    size_t l, i;
+
+    r = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
+    if (r != SCARD_S_SUCCESS) {
+        fprintf(stderr, "Could not connect to PC/SC Service\n");
+        goto err;
+    }
+
+
+    readerslen = SCARD_AUTOALLOCATE;
+    r = SCardListReaders(hContext, NULL, (LPSTR) readers, &readerslen);
+    if (r != SCARD_S_SUCCESS) {
+        fprintf(stderr, "Could not get readers\n");
+        goto err;
+    }
+
+    for (reader = *readers, i = 0; readerslen > 0;
+            l = strlen(reader) + 1, readerslen -= l, reader += l, i++) {
+
+        if (i == readernum)
+            break;
+    }
+    if (readerslen <= 0) {
+        fprintf(stderr, "Could not find reader number %u\n", readernum);
+        r = SCARD_E_UNKNOWN_READER;
+        goto err;
+    }
+
+
+    r = SCardConnect(hContext, reader, dwShareMode, dwPreferredProtocol,
+            phCard, &ctl); 
+    if (r != SCARD_S_SUCCESS) {
+        fprintf(stderr, "Could not connect to %s\n", reader);
+        goto err;
+    }
+    printf("Connected to %s\n", reader);
+
+err:
+    return r;
+}