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Diffstat (limited to 'dggui/resource.cc')
| -rw-r--r-- | dggui/resource.cc | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/dggui/resource.cc b/dggui/resource.cc new file mode 100644 index 0000000..52aca0a --- /dev/null +++ b/dggui/resource.cc @@ -0,0 +1,194 @@ +/* -*- 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:: |