Diff: CharValue.cpp

Revision:

0:744801d5734d

diff -r 000000000000 -r 744801d5734d CharValue.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CharValue.cpp	Mon Mar 24 09:57:40 2014 +0000
@@ -0,0 +1,137 @@
+/*
+ * CharValue.cpp
+ *
+ * Created on: Nov 1, 2013
+ * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
+ *
+ * Copyright (c) 2013 Cumulocity GmbH
+ *
+ * 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.
+ */
+
+#include "CharValue.h"
+#include "NullValue.h"
+#include <stdlib.h>
+#include <string.h>
+
+inline int8_t __charvalue_need_escape(const char *str);
+
+CharValue::CharValue(const char *str, bool copy)
+{
+    if ((str == NULL) || (strlen(str) == 0)) {
+        _alloc = false;
+        _str = NULL;
+    } else {
+        _alloc = copy;
+        if (copy) {
+            _str = (const char*)malloc(strlen(str)*sizeof(char));
+            strcpy((char*)_str, str);
+        } else {
+            _str = str;
+        }
+    }
+}
+
+CharValue::~CharValue()
+{
+    if (_alloc)
+        free((void*)_str);
+}
+
+uint8_t CharValue::valueType() const
+{
+    if (_str == NULL)
+        return VALUE_NULL;
+    return VALUE_CHARACTER;
+}
+
+long CharValue::integerValue() const
+{
+    return 0;
+}
+
+double CharValue::floatValue() const
+{
+    return 0.0;
+}
+
+const char * CharValue::characterValue() const
+{
+    return _str;
+}
+
+size_t CharValue::write(AbstractDataSink& sink) const
+{
+    if (_str == NULL)
+        return 0;
+    size_t n = 0;
+    int8_t esc = __charvalue_need_escape(_str) ? 1 : 0;
+    if (esc) n += sink.write('"');
+    for (char *q = (char*)_str, c; (c = *q) > 0; q++) {
+        if ((esc) && (c == '"'))
+            n += sink.write('"');
+        n += sink.write(c);
+    }
+    if (esc) n += sink.write('"');
+    return n;
+}
+
+size_t CharValue::length() const
+{
+    if (_str == NULL)
+        return 0;
+    size_t n = 0;
+    int8_t esc = __charvalue_need_escape(_str) ? 1 : 0;
+    if (esc)
+        n += 2;
+    for (char *q = (char*)_str, c; (c = *q) > 0; q++) {
+        if ((esc) && (c == '"'))
+            n++;
+        n++;
+    }
+    return n;
+}
+
+int8_t __charvalue_need_escape(const char *str)
+{
+    int8_t w = 0;
+    for (char c; (c = *str) > 0; str++) {
+        if ((c == ' ') || (c == '\t')) {
+            if (w == 0)
+                return 1;
+            w = 2;
+        } else {
+            w = 1;
+            if ((c == '"') || (c == ',') || (c == '\r') || (c == '\n'))
+                return 1;
+        }
+    }
+    if (w == 2)
+        return 1;
+    return 0;
+}
+
+Value* CharValue::copy() const
+{
+    if (_str == NULL)
+        return new NullValue();
+    return new CharValue(_str, true);
+}
+