[Bf-blender-cvs] [156a5f1] alembic_pointcache: Utility functions for setting the cache path. Same procedure as in classic pointcache, can be improved later.

[Lukas Tönne]

Commit: 156a5f15b2c99184a9e879c5f0c1c66714638e79
Author: Lukas Tönne
Date:   Thu Oct 17 18:44:05 2013 +0200
Branches: alembic_pointcache
https://developer.blender.org/rB156a5f15b2c99184a9e879c5f0c1c66714638e79

Utility functions for setting the cache path. Same procedure as in classic pointcache, can be improved later.

===================================================================

M	source/blender/pointcache/CMakeLists.txt
A	source/blender/pointcache/util/util_path.cpp
A	source/blender/pointcache/util/util_path.h

===================================================================

diff --git a/source/blender/pointcache/CMakeLists.txt b/source/blender/pointcache/CMakeLists.txt
index c2e8247..4070cbc 100644
--- a/source/blender/pointcache/CMakeLists.txt
+++ b/source/blender/pointcache/CMakeLists.txt
@@ -24,6 +24,8 @@
 set(INC
 	.
 	intern
+	../blenkernel
+	../blenlib
 	../makesdna
 	../../../intern/guardedalloc
 )
@@ -34,6 +36,9 @@ set(INC_SYS
 set(SRC
 	test.cpp
 
+	util/util_path.h
+	util/util_path.cpp
+
 	PTC_api.h
 	PTC_api.cpp
 )
diff --git a/source/blender/pointcache/util/util_path.cpp b/source/blender/pointcache/util/util_path.cpp
new file mode 100644
index 0000000..e41e6b8
--- /dev/null
+++ b/source/blender/pointcache/util/util_path.cpp
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2013, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <string.h> /* XXX needed for missing type declarations in BLI ... */
+
+extern "C" {
+#include "BLI_path_util.h"
+#include "BLI_string.h"
+
+#include "DNA_ID.h"
+#include "DNA_object_types.h"
+#include "DNA_particle_types.h"
+
+#include "BKE_global.h"
+#include "BKE_main.h"
+}
+
+#include "util_path.h"
+
+namespace PTC {
+namespace Util {
+
+/* XXX do we want to use BLI C string functions here? just copied from BKE_pointcache for now */
+
+static int ptc_path(char *filename, const char *path, ID *id, bool is_external, bool ignore_libpath)
+{
+	Library *lib = id ? id->lib : NULL;
+	const char *blendfilename= (lib && !ignore_libpath) ? lib->filepath: G.main->name;
+
+	if (path && is_external) {
+		strcpy(filename, path);
+
+		if (BLI_path_is_rel(filename)) {
+			BLI_path_abs(filename, blendfilename);
+		}
+	}
+	else if (G.relbase_valid || lib) {
+		char file[FILE_MAXFILE]; /* we don't want the dir, only the file */
+
+		BLI_split_file_part(blendfilename, file, sizeof(file));
+		BLI_replace_extension(file, sizeof(file), ""); /* remove extension */
+		BLI_snprintf(filename, FILE_MAX, "//" PTC_DIRECTORY "%s", file); /* add blend file name to pointcache dir */
+		BLI_path_abs(filename, blendfilename);
+	}
+	else {
+		/* use the temp path. this is weak but better then not using point cache at all */
+		/* temporary directory is assumed to exist and ALWAYS has a trailing slash */
+		BLI_snprintf(filename, FILE_MAX, "%s" PTC_DIRECTORY, BLI_temporary_dir());
+	}
+	
+	return BLI_add_slash(filename); /* new strlen() */
+}
+
+static int ptc_filename(char *filename, const char *name, int index, const char *path, ID *id,
+                        bool do_path, bool do_ext, bool is_external, bool ignore_libpath)
+{
+	char *newname = filename;
+	int len=0;
+	filename[0] = '\0';
+	newname = filename;
+	
+	if (!G.relbase_valid && !is_external)
+		return 0; /* save blend file before using disk pointcache */
+	
+	/* start with temp dir */
+	if (do_path) {
+		len = ptc_path(filename, path, id, is_external, ignore_libpath);
+		newname += len;
+	}
+	if (name[0] == '\0' && !is_external) {
+		const char *idname = (id->name + 2);
+		/* convert chars to hex so they are always a valid filename */
+		while ('\0' != *idname) {
+			BLI_snprintf(newname, FILE_MAX, "%02X", (char)(*idname++));
+			newname += 2;
+			len += 2;
+		}
+	}
+	else {
+		int namelen = (int)strlen(name); 
+		strcpy(newname, name); 
+		newname += namelen;
+		len += namelen;
+	}
+	
+	if (do_ext) {
+		if (index < 0 || !is_external) {
+			len += BLI_snprintf(newname, FILE_MAX, PTC_EXTENSION);
+		}
+		else {
+			len += BLI_snprintf(newname, FILE_MAX, "_%02u" PTC_EXTENSION, index);
+		}
+	}
+	
+	return len;
+}
+
+std::string archive_path(const std::string &name, int index, const std::string &path, ID *id,
+                         bool do_path, bool do_ext, bool is_external, bool ignore_libpath)
+{
+	char filename[FILE_MAX];
+	ptc_filename(filename, name.c_str(), index, path.c_str(), id, do_path, do_ext, is_external, ignore_libpath);
+	return std::string(filename);
+}
+
+} /* namespace Util */
+} /* namespace PTC */
diff --git a/source/blender/pointcache/util/util_path.h b/source/blender/pointcache/util/util_path.h
new file mode 100644
index 0000000..29f753f
--- /dev/null
+++ b/source/blender/pointcache/util/util_path.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2013, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef PTC_UTIL_PATH_H
+#define PTC_UTIL_PATH_H
+
+#include <string>
+
+struct ID;
+
+namespace PTC {
+namespace Util {
+
+/* XXX make these configurable, just copied from BKE_pointcache for now */
+#define PTC_EXTENSION ".abc"
+#define PTC_DIRECTORY "blendcache_"
+
+std::string archive_path(const std::string &name, int index, const std::string &path, ID *id,
+                         bool do_path, bool do_ext, bool is_external, bool ignore_libpath);
+
+} /* namespace Util */
+} /* namespace PTC */
+
+#endif  /* PTC_UTIL_PATH_H */