Diff: source/core/MicroBitCompat.cpp

Revision:

1:8aa5cdb4ab67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/core/MicroBitCompat.cpp	Thu Apr 07 01:33:22 2016 +0100
@@ -0,0 +1,101 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 British Broadcasting Corporation.
+This software is provided by Lancaster University by arrangement with the BBC.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+/**
+  * This file contains functions used to maintain compatability and portability.
+  * It also contains constants that are used elsewhere in the DAL.
+  */
+#include "MicroBitConfig.h"
+#include "MicroBitCompat.h"
+#include "ErrorNo.h"
+
+
+/**
+  * Performs an in buffer reverse of a given char array.
+  *
+  * @param s the string to reverse.
+  *
+  * @return MICROBIT_OK, or MICROBIT_INVALID_PARAMETER.
+  */
+int string_reverse(char *s)
+{
+    //sanity check...
+    if(s == NULL)
+        return MICROBIT_INVALID_PARAMETER;
+
+    char *j;
+    int c;
+
+    j = s + strlen(s) - 1;
+
+    while(s < j)
+    {
+        c = *s;
+        *s++ = *j;
+        *j-- = c;
+    }
+
+    return MICROBIT_OK;
+}
+
+/**
+  * Converts a given integer into a string representation.
+  *
+  * @param n The number to convert.
+  *
+  * @param s A pointer to the buffer where the resulting string will be stored.
+  *
+  * @return MICROBIT_OK, or MICROBIT_INVALID_PARAMETER.
+  */
+int itoa(int n, char *s)
+{
+    int i = 0;
+    int positive = (n >= 0);
+
+    if (s == NULL)
+        return MICROBIT_INVALID_PARAMETER;
+
+    // Record the sign of the number,
+    // Ensure our working value is positive.
+    if (positive)
+        n = -n;
+
+    // Calculate each character, starting with the LSB.
+    do {
+         s[i++] = abs(n % 10) + '0';
+    } while (abs(n /= 10) > 0);
+
+    // Add a negative sign as needed
+    if (!positive)
+        s[i++] = '-';
+
+    // Terminate the string.
+    s[i] = '\0';
+
+    // Flip the order.
+    string_reverse(s);
+
+    return MICROBIT_OK;
+}