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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* resource.cc
*
* Sun Mar 17 19:38:04 CET 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "resource.h"
#include <hugin.hpp>
#include <cstdio>
#include <climits>
#include <platform.h>
#if DG_PLATFORM != DG_PLATFORM_WINDOWS
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
// rcgen generated file containing rc_data declaration.
#include "resource_data.h"
extern const rc_data_t* rc_data;
namespace GUI
{
// TODO: Replace with std::filesystem::is_regular_file once we update the
// compiler to require C++17
static bool pathIsFile(const std::string& path)
{
#if DG_PLATFORM == DG_PLATFORM_WINDOWS
return (GetFileAttributesA(path.data()) & FILE_ATTRIBUTE_DIRECTORY) == 0;
#else
struct stat s;
if(stat(path.data(), &s) != 0)
{
return false; // error
}
return (s.st_mode & S_IFREG) != 0; // s.st_mode & S_IFDIR => dir
#endif
}
// Internal resources start with a colon.
static bool nameIsInternal(const std::string& name)
{
return name.size() && (name[0] == ':');
}
Resource::Resource(const std::string& name)
{
isValid = false;
if(nameIsInternal(name))
{
// Use internal resource:
// Find internal resource in rc_data.
const rc_data_t* p = rc_data;
while(p && *p->name) // last entry in rc_data has the name := ""
{
if(name == p->name)
{
internalData = p->data;
internalSize = p->size;
break;
}
++p;
}
// We did not find the named resource.
if(internalData == nullptr)
{
ERR(rc, "Could not find '%s'\n", name.c_str());
return;
}
isInternal = true;
}
else
{
if(!pathIsFile(name))
{
return;
}
// Read from file:
std::FILE *fp = std::fopen(name.data(), "rb");
if(!fp)
{
return;
}
// Get the file size
if(std::fseek(fp, 0, SEEK_END) == -1)
{
std::fclose(fp);
return;
}
long filesize = std::ftell(fp);
// Apparently fseek doesn't fail if fp points to a directory that has been
// opened (which doesn't fail either!!) and ftell will then fail by either
// returning -1 or LONG_MAX
if(filesize == -1L || filesize == LONG_MAX)
{
std::fclose(fp);
return;
}
// Reserve space in the string for the data.
externalData.reserve(filesize);
// Rewind and read...
std::rewind(fp);
char buffer[32];
while(!std::feof(fp))
{
size_t size = std::fread(buffer, 1, sizeof(buffer), fp);
externalData.append(buffer, size);
}
std::fclose(fp);
isInternal = false;
}
isValid = true;
}
const char *Resource::data()
{
if(isValid == false)
{
return nullptr;
}
if(isInternal)
{
return internalData;
}
else
{
return externalData.data();
}
}
size_t Resource::size()
{
if(isValid == false)
{
return 0;
}
if(isInternal)
{
return internalSize;
}
else
{
return externalData.length();
}
}
bool Resource::valid()
{
return isValid;
}
} // GUI::
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