fdsdump: add extra methods to FieldView

Author: sedmicha

src/tools/fdsdump/src/common/fieldView.cpp

@@ -4,6 +4,8 @@
 
 #include <common/fieldView.hpp>
 
+#include <libfds/converters.h>
+
 namespace fdsdump {
 
 uint64_t
@@ -115,4 +117,35 @@ FieldView::as_ipaddr() const
     throw std::invalid_argument("Conversion error (ipaddr)");
 }
 
+std::string
+FieldView::as_string() const
+{
+    std::string value;
+
+    if (m_field.size > 0) {
+        // &value[0] doesn't work for zero-sized strings, so we have to handle this specially
+        value.resize(m_field.size);
+        int ret = fds_get_string(m_field.data, m_field.size, &value[0]);
+        if (ret != FDS_OK) {
+            throw std::invalid_argument("Conversion error (string)");
+        }
+    }
+
+    return value;
+}
+
+std::vector<uint8_t>
+FieldView::as_bytes() const
+{
+    std::vector<uint8_t> value;
+
+    value.resize(m_field.size);
+    int ret = fds_get_octet_array(m_field.data, m_field.size, value.data());
+    if (ret != FDS_OK) {
+        throw std::invalid_argument("Conversion error (bytes)");
+    }
+
+    return value;
+}
+
 } // fdsdump

src/tools/fdsdump/src/common/fieldView.hpp

@@ -1,7 +1,10 @@
 
 #pragma once
 
+#include <cstdint>
 #include <ctime>
+#include <string>
+#include <vector>
 
 #include <libfds.h>
 
@@ -21,6 +24,8 @@ class FieldView {
     struct timespec as_datetime() const;
     uint64_t as_datetime_ms() const;
     IPAddr as_ipaddr() const;
+    std::string as_string() const;
+    std::vector<uint8_t> as_bytes() const;
 
 private:
     const struct fds_drec_field &m_field;