fdsdump: fieldView: define component

Author: Lukas Hutak

src/tools/fdsdump/src/fieldView.cpp

@@ -0,0 +1,95 @@
+
+
+#include <stdexcept>
+
+#include "fieldView.hpp"
+
+uint64_t
+FieldView::as_uint() const
+{
+    uint64_t result;
+    int ret;
+
+    ret = fds_get_uint_be(m_field.data, m_field.size, &result);
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Field value conversion error (unsinged)");
+    }
+
+    return result;
+}
+
+int64_t
+FieldView::as_int() const
+{
+    int64_t result;
+    int ret;
+
+    ret = fds_get_int_be(m_field.data, m_field.size, &result);
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Conversion error (signed)");
+    }
+
+    return result;
+}
+
+double
+FieldView::as_float() const
+{
+    double result;
+    int ret;
+
+    ret = fds_get_float_be(m_field.data, m_field.size, &result);
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Conversion error (float)");
+    }
+
+    return result;
+}
+
+bool
+FieldView::as_bool() const
+{
+    bool result;
+    int ret;
+
+    ret = fds_get_bool(m_field.data, m_field.size, &result);
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Conversion error (boolean)");
+    }
+
+    return result;
+}
+
+struct timespec
+FieldView::as_datetime() const
+{
+    const struct fds_iemgr_elem *elem = m_field.info->def;
+    struct timespec result;
+    int ret;
+
+    if (!elem) {
+        throw std::invalid_argument("Conversion error (undefined datetime type)");
+    }
+
+    ret = fds_get_datetime_hp_be(m_field.data, m_field.size, elem->data_type, &result);
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Conversion error (datetime)");
+    }
+
+    return result;
+}
+
+IPAddr
+FieldView::as_ipaddr() const
+{
+    if (m_field.size == 4U) {
+        const uint32_t *value = reinterpret_cast<uint32_t *>(m_field.data);
+        return IPAddr(*value);
+    }
+
+    if (m_field.size == 16U) {
+        return IPAddr(m_field.data);
+    }
+
+    throw std::invalid_argument("Conversion error (ipaddr)");
+}

src/tools/fdsdump/src/fieldView.hpp

@@ -0,0 +1,24 @@
+
+#pragma once
+
+#include <ctime>
+
+#include <libfds.h>
+
+#include "ipaddr.hpp"
+
+class FieldView {
+public:
+    FieldView(const struct fds_drec_field &field)
+        : m_field(field) {};
+
+    uint64_t as_uint() const;
+    int64_t as_int() const;
+    double as_float() const;
+    bool as_bool() const;
+    struct timespec as_datetime() const;
+    IPAddr as_ipaddr() const;
+
+private:
+    const struct fds_drec_field &m_field;
+};