Diff: ParsedValue.cpp

Revision:

0:099f76422485

Child:

7:8159a2d12e4e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ParsedValue.cpp	Thu Jul 03 20:38:04 2014 +0200
@@ -0,0 +1,160 @@
+/*
+ * ParsedValue.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 "ParsedValue.h"
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <math.h>
+#include "NullValue.h"
+#include "IntegerValue.h"
+#include "FloatValue.h"
+#include "CharValue.h"
+
+ParsedValue::ParsedValue(const char *str, bool copy) : _value(str, copy), _float(0.0), _digits(0), _zflag(false), _integer(0l)
+{
+    if (_value.valueType() != VALUE_NULL) {
+        _type = VALUE_CHARACTER;
+        extractValue();
+    } else {
+        _type = VALUE_NULL;
+    }
+}
+
+uint8_t ParsedValue::valueType() const
+{
+    return _type;
+}
+
+long ParsedValue::integerValue() const
+{
+    return _integer;
+}
+
+double ParsedValue::floatValue() const
+{
+    return _float;
+}
+
+const char * ParsedValue::characterValue() const
+{
+    if (_type != VALUE_CHARACTER)
+        return NULL;
+    return _value.characterValue();
+}
+
+size_t ParsedValue::write(AbstractDataSink& sink) const
+{
+    return _value.write(sink);
+}
+
+size_t ParsedValue::length() const
+{
+    return _value.length();
+}
+
+Value* ParsedValue::copy() const
+{
+    if (_type == VALUE_NULL)
+        return new NullValue();
+    if (_type == VALUE_INTEGER)
+        return new IntegerValue(_integer);
+    if (_type == VALUE_FLOAT)
+        return new FloatValue(_float, _digits, _zflag);
+    return new CharValue(_value.characterValue(), true);
+}
+
+void ParsedValue::extractValue()
+{
+    const char *str; char *ptr, c;
+    bool floating = false, zflag = false, negative = false;
+    uint8_t digits = 0;
+    
+    str = _value.characterValue();
+
+    if (isspace(*str))
+        return;
+
+    // easy check for nan
+    if (strcmp(str, "nan") == 0) {
+        _float = NAN;
+        _type = VALUE_FLOAT;
+        return;
+    }
+
+    if (*str == '-') {
+        negative = true;
+        str++;
+    }
+        
+    if (strcmp(str, "inf") == 0) {
+        _float = (negative) ? -INFINITY : INFINITY;
+        _type = VALUE_FLOAT;
+        return;
+    }
+
+    for (ptr = (char*)str; (c = *ptr) != 0; ptr++) {
+        if (floating) {
+            if (!isdigit(c))
+                return;
+            digits++;
+        } else {
+            if (c == '.') {
+                if (*(ptr+1) == '\0')
+                    return;
+                floating = true;
+            } else if (isdigit(c)) {
+                _zflag = true;
+            } else {
+                return;
+            }
+        }
+    }
+
+    if (floating) {
+        errno = 0;
+        if ((((_float = strtod(str, &ptr)) != 0.0) || (errno == 0)) &&
+            (*ptr == '\0')) {
+            if (negative)
+                _float = -_float;
+            _zflag = zflag;
+            _digits = digits;
+            _type = VALUE_FLOAT;
+        }
+    } else {
+        errno = 0;
+        if ((((_integer = strtol(str, &ptr, 10)) != 0) || (errno == 0)) &&
+            (*ptr == '\0')) {
+            if (negative)
+                _integer = -_integer;
+            _type = VALUE_INTEGER;
+            return;
+        }
+    }
+}