1 files changed, 81 insertions, 0 deletions
diff --git a/pjlib/src/pj/guid_simple.c b/pjlib/src/pj/guid_simple.c
new file mode 100644
index 0000000..8bf8ae9
--- /dev/null
+++ b/pjlib/src/pj/guid_simple.c
@@ -0,0 +1,81 @@
+/* $Id: guid_simple.c 3553 2011-05-05 06:14:19Z nanang $ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pj/guid.h>
+#include <pj/assert.h>
+#include <pj/rand.h>
+#include <pj/os.h>
+#include <pj/string.h>
+
+PJ_DEF_DATA(const unsigned) PJ_GUID_STRING_LENGTH=32;
+
+static char guid_chars[64];
+
+PJ_DEF(unsigned) pj_GUID_STRING_LENGTH()
+{
+    return PJ_GUID_STRING_LENGTH;
+}
+
+static void init_guid_chars(void)
+{
+    char *p = guid_chars;
+    unsigned i;
+
+    for (i=0; i<10; ++i)
+	*p++ = '0'+i;
+
+    for (i=0; i<26; ++i) {
+	*p++ = 'a'+i;
+	*p++ = 'A'+i;
+    }
+
+    *p++ = '-';
+    *p++ = '.';
+}
+
+PJ_DEF(pj_str_t*) pj_generate_unique_string(pj_str_t *str)
+{
+    char *p, *end;
+
+    PJ_CHECK_STACK();
+
+    if (guid_chars[0] == '\0') {
+	pj_enter_critical_section();
+	if (guid_chars[0] == '\0') {
+	    init_guid_chars();
+	}
+	pj_leave_critical_section();
+    }
+
+    /* This would only work if PJ_GUID_STRING_LENGTH is multiple of 2 bytes */
+    pj_assert(PJ_GUID_STRING_LENGTH % 2 == 0);
+
+    for (p=str->ptr, end=p+PJ_GUID_STRING_LENGTH; p<end; ) {
+	pj_uint32_t rand_val = pj_rand();
+	pj_uint32_t rand_idx = RAND_MAX;
+
+	for ( ; rand_idx>0 && p<end; rand_idx>>=8, rand_val>>=8, p++) {
+	    *p = guid_chars[(rand_val & 0xFF) & 63];
+	}
+    }
+
+    str->slen = PJ_GUID_STRING_LENGTH;
+    return str;
+}
+