From 6ee68a773a24586f6e6cfaccdf7dce064d213e88 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 14 Jun 2009 15:36:18 +0000
Subject: Add strtoul, strtoll, strtoull, atol, and atoll.

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1883 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/lib/lib_checkbase.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 nuttx/lib/lib_checkbase.c

(limited to 'nuttx/lib/lib_checkbase.c')

diff --git a/nuttx/lib/lib_checkbase.c b/nuttx/lib/lib_checkbase.c
new file mode 100644
index 000000000..bf4dadf02
--- /dev/null
+++ b/nuttx/lib/lib_checkbase.c
@@ -0,0 +1,114 @@
+/****************************************************************************
+ * lib_checkbase.c
+ *
+ *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <string.h>
+#include <ctype.h>
+#include "lib_internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lib_checkbase
+ *
+ * Description:
+ *   This is part of the strol() family implementation.  This function checks
+ *   the initial part of a string to see if it can determine the numeric
+ *   base that is represented.
+ *
+ * Assumptions:
+ *   *ptr points to the first, non-whitespace character in the string.
+ *
+ ****************************************************************************/
+ 
+int lib_checkbase(int base, const char **pptr)
+{
+   const char *ptr = *pptr;
+
+  /* Check for unspecified base */
+
+  if (!base)
+    {
+      /* Assume base 10 */
+
+      base = 10;
+
+      /* Check for leading '0' - that would signify octal or hex (or binary) */
+
+      if (*ptr == '0')
+        {
+          /* Assume octal */
+
+          base = 8;
+          ptr++;
+
+          /* Check for hexidecimal */
+
+          if ((*ptr == 'X' || *ptr == 'x') && 
+              lib_isbasedigit(ptr[1], 16, NULL))
+            {
+              base = 16;
+              ptr++;
+            }
+        }
+    }
+
+  /* If it a hexidecimal representation, than discard any leading "0X" or "0x" */
+
+  else if (base == 16)
+    {
+      if (ptr[0] == '0' && (ptr[1] == 'X' || ptr[1] == 'x'))
+        {
+          ptr += 2;
+        }
+    }
+
+  /* Return the updated pointer and base */
+
+  *pptr = ptr;
+  return base;
+}
+
-- 
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