From 94f07acffb4a61731a30f08336e79dcf3ad772d7 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 19 Apr 2016 00:22:55 +0100
Subject: Add a swaith of utility classes

---
 gentoobrowse-api/service/Jamfile.jam   |  1 +
 gentoobrowse-api/service/dbUtils.cpp   | 21 ++++++++++++++++
 gentoobrowse-api/service/dbUtils.h     | 15 ++++++++++++
 gentoobrowse-api/service/fileUtils.cpp | 45 ++++++++++++++++++++++++++++++++++
 gentoobrowse-api/service/fileUtils.h   | 40 ++++++++++++++++++++++++++++++
 gentoobrowse-api/service/xmlUtils.cpp  | 26 ++++++++++++++++++++
 gentoobrowse-api/service/xmlUtils.h    | 20 +++++++++++++++
 7 files changed, 168 insertions(+)
 create mode 100644 gentoobrowse-api/service/dbUtils.cpp
 create mode 100644 gentoobrowse-api/service/dbUtils.h
 create mode 100644 gentoobrowse-api/service/fileUtils.cpp
 create mode 100644 gentoobrowse-api/service/fileUtils.h
 create mode 100644 gentoobrowse-api/service/xmlUtils.cpp
 create mode 100644 gentoobrowse-api/service/xmlUtils.h

diff --git a/gentoobrowse-api/service/Jamfile.jam b/gentoobrowse-api/service/Jamfile.jam
index c4b1bad..c5a19a2 100644
--- a/gentoobrowse-api/service/Jamfile.jam
+++ b/gentoobrowse-api/service/Jamfile.jam
@@ -23,6 +23,7 @@ lib gentoobrowse-service :
 	<library>..//boost_filesystem
 	<library>..//boost_date_time
 	<library>../..//glibmm
+	<library>../..//libxmlpp
 	<icetray.sql.namespace>Gentoo::Service
 	<include>.
 	: :
diff --git a/gentoobrowse-api/service/dbUtils.cpp b/gentoobrowse-api/service/dbUtils.cpp
new file mode 100644
index 0000000..0bdb279
--- /dev/null
+++ b/gentoobrowse-api/service/dbUtils.cpp
@@ -0,0 +1,21 @@
+#include "dbUtils.h"
+
+namespace Gentoo {
+	namespace Utils {
+		namespace Database {
+			bool
+			bindOptionalsS(const DB::CommandPtr & db, unsigned int c, const std::vector<boost::optional<Glib::ustring> > & vs)
+			{
+				for(const auto & v : vs) {
+					if (v) {
+						db->bindParamS(c, *v);
+						return true;
+					}
+				}
+				db->bindNull(c);
+				return false;
+			}
+		}
+	}
+}
+
diff --git a/gentoobrowse-api/service/dbUtils.h b/gentoobrowse-api/service/dbUtils.h
new file mode 100644
index 0000000..1f3e2f3
--- /dev/null
+++ b/gentoobrowse-api/service/dbUtils.h
@@ -0,0 +1,15 @@
+#ifndef GENTOOBROWSE_API_SERVICE_DBUTILS_H
+#define GENTOOBROWSE_API_SERVICE_DBUTILS_H
+
+#include <command.h>
+
+namespace Gentoo {
+	namespace Utils {
+		namespace Database {
+			bool bindOptionalsS(const DB::CommandPtr & db, unsigned int c, const std::vector<boost::optional<Glib::ustring> > & vs);
+		}
+	}
+}
+
+#endif
+
diff --git a/gentoobrowse-api/service/fileUtils.cpp b/gentoobrowse-api/service/fileUtils.cpp
new file mode 100644
index 0000000..cfa02bc
--- /dev/null
+++ b/gentoobrowse-api/service/fileUtils.cpp
@@ -0,0 +1,45 @@
+#include "fileUtils.h"
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+namespace Gentoo {
+	namespace Utils {
+		FileHandle::FileHandle(const std::string & path) :
+			fh(open(path.c_str(), O_RDONLY))
+		{
+			if (fh < 0) {
+				throw std::runtime_error("Failed to open " + path);
+			}
+		}
+
+		FileHandle::~FileHandle()
+		{
+			close(fh);
+		}
+
+		FileHandleStat::FileHandleStat(const std::string & path) :
+			FileHandle(path)
+		{
+			if (fstat(fh, &st)) {
+				throw std::runtime_error("Failed to stat " + path);
+			}
+		}
+
+		MemMap::MemMap(const std::string & path) :
+			FileHandleStat(path),
+			data(mmap(0, st.st_size, PROT_READ, MAP_SHARED, fh, 0))
+		{
+			if (data == (void*)-1) {
+				throw std::runtime_error("Failed to mmap " + path);
+			}
+		}
+
+		MemMap::~MemMap()
+		{
+			munmap(data, st.st_size);
+		}
+
+	}
+}
+
diff --git a/gentoobrowse-api/service/fileUtils.h b/gentoobrowse-api/service/fileUtils.h
new file mode 100644
index 0000000..58d235f
--- /dev/null
+++ b/gentoobrowse-api/service/fileUtils.h
@@ -0,0 +1,40 @@
+#ifndef GENTOOBROWSE_API_SERVICE_FILEUTILS_H
+#define GENTOOBROWSE_API_SERVICE_FILEUTILS_H
+
+#include <boost/filesystem/path.hpp>
+#include <sys/stat.h>
+
+namespace Gentoo {
+	namespace Utils {
+		class FileHandle {
+			public:
+				FileHandle(const std::string & path);
+				~FileHandle();
+
+			protected:
+				const int fh;
+		};
+
+		class FileHandleStat : public FileHandle {
+			public:
+				FileHandleStat(const std::string & path);
+
+			protected:
+				struct stat st;
+		};
+
+		class MemMap : public FileHandleStat {
+			public:
+				MemMap(const std::string & path);
+				~MemMap();
+
+			protected:
+				void * data;
+		};
+
+	}
+}
+
+#endif
+
+
diff --git a/gentoobrowse-api/service/xmlUtils.cpp b/gentoobrowse-api/service/xmlUtils.cpp
new file mode 100644
index 0000000..3fc3b44
--- /dev/null
+++ b/gentoobrowse-api/service/xmlUtils.cpp
@@ -0,0 +1,26 @@
+#include "xmlUtils.h"
+
+namespace Gentoo {
+	namespace Utils {
+		XmlDoc::XmlDoc(const boost::filesystem::path & path) :
+			xmlpp::DomParser(path.string())
+		{
+		}
+
+		boost::optional<Glib::ustring>
+		XmlDoc::getXPathValue(const Glib::ustring & xp)
+		{
+			auto ns = get_document()->get_root_node()->find(xp);
+			if (ns.size() >= 1) {
+				if (auto cn = dynamic_cast<const xmlpp::ContentNode *>(ns.front())) {
+					return cn->get_content();
+				}
+			}
+			else if (ns.size() > 1) {
+				throw std::logic_error("Ambiguous xpath " + xp);
+			}
+			return boost::optional<Glib::ustring>();
+		}
+	}
+}
+
diff --git a/gentoobrowse-api/service/xmlUtils.h b/gentoobrowse-api/service/xmlUtils.h
new file mode 100644
index 0000000..158e134
--- /dev/null
+++ b/gentoobrowse-api/service/xmlUtils.h
@@ -0,0 +1,20 @@
+#ifndef GENTOOBROWSE_API_SERVICE_XMLUTILS_H
+#define GENTOOBROWSE_API_SERVICE_XMLUTILS_H
+
+#include <libxml++/parsers/domparser.h>
+#include <boost/filesystem/path.hpp>
+#include <boost/optional.hpp>
+
+namespace Gentoo {
+	namespace Utils {
+		class XmlDoc : public xmlpp::DomParser {
+			public:
+				XmlDoc(const boost::filesystem::path &);
+
+				boost::optional<Glib::ustring> getXPathValue(const Glib::ustring &);
+		};
+	}
+}
+
+#endif
+
-- 
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