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#ifdef RCSID
static char RCSid[] =
"$Header: d:/cvsroot/tads/tads3/resload.cpp,v 1.2 1999/05/17 02:52:29 MJRoberts Exp $";
#endif
/*
* Copyright (c) 1998, 2002 Michael J. Roberts. All Rights Reserved.
*
* Please see the accompanying license file, LICENSE.TXT, for information
* on using and copying this software.
*/
/*
Name
resload.cpp - resource loader
Function
Notes
Modified
10/17/98 MJRoberts - Creation
*/
#include <stddef.h>
#include <string.h>
#include "t3std.h"
#include "resload.h"
/* ------------------------------------------------------------------------ */
/*
* create resource loader
*/
CResLoader::CResLoader()
{
/* we have no root directory */
root_dir_ = 0;
/* no executable path yet */
exe_filename_ = 0;
}
/*
* create a resource loader given a root directory
*/
CResLoader::CResLoader(const char *root_dir)
{
/* remember the root directory for file searches */
root_dir_ = lib_copy_str(root_dir);
/* no executable path yet */
exe_filename_ = 0;
}
/*
* delete resource loader
*/
CResLoader::~CResLoader()
{
/* free our root directory string and executable path string */
lib_free_str(root_dir_);
lib_free_str(exe_filename_);
}
/*
* Open a resource file given the resource path.
*/
osfildef *CResLoader::open_res_file(const char *respath,
const char *deflib,
const char *exerestype)
{
char filepath[OSFNMAX];
osfildef *fp;
/*
* Look for the resource as an external file. If we have a root
* directory, look for the file under that directory; otherwise,
* look for it in the current directory.
*/
if (root_dir_ != 0)
{
/* get the resource name as a file path */
char fname[OSFNMAX];
os_cvt_url_dir(fname, sizeof(fname), respath);
/* build a full path from the root directory and the resource path */
os_build_full_path(filepath, sizeof(filepath), root_dir_, fname);
}
else
{
/* get the resource name as a file path */
os_cvt_url_dir(filepath, sizeof(filepath), respath);
}
/* try opening the file */
fp = osfoprb(filepath, OSFTBIN);
/* if we didn't find it, try looking in the default library */
if (fp == 0 && deflib != 0)
{
char fname[OSFNMAX];
/* convert from URL notation to local path conventions */
os_cvt_url_dir(fname, sizeof(fname), deflib);
/* build the full path, starting in the root resource directory */
os_build_full_path(filepath, sizeof(filepath), root_dir_, fname);
/* add the default resource library extension */
os_defext(filepath, "t3r");
/* try opening the file */
fp = open_lib_res(filepath, respath);
}
/* if we still didn't find it, try looking in the executable */
if (fp == 0 && exerestype != 0)
fp = open_exe_res(respath, exerestype);
/* return the result */
return fp;
}
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