The contents of the output buffer are undefined if PHYSFSX_getRealPath fails, so mark the function as [[nodiscard]] and modify all callers to check that the function succeeded.
658 lines
19 KiB
C++
658 lines
19 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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/*
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*
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* Some simple physfs extensions
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*
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*/
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#include <cstdlib>
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#if !defined(macintosh) && !defined(_MSC_VER)
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#include <sys/param.h>
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#endif
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#if defined(__APPLE__) && defined(__MACH__)
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#include <sys/mount.h>
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#include <unistd.h> // for chdir hack
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#include <ApplicationServices/ApplicationServices.h>
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#endif
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#include "args.h"
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#include "newdemo.h"
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#include "console.h"
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#include "strutil.h"
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#include "ignorecase.h"
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#include "physfs_list.h"
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#include "compiler-range_for.h"
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#include "compiler-poison.h"
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#include "partial_range.h"
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namespace dcx {
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const std::array<file_extension_t, 1> archive_exts{{"dxa"}};
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char *PHYSFSX_fgets_t::get(char *const buf, std::size_t n, PHYSFS_File *const fp)
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{
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PHYSFS_sint64 r = PHYSFS_read(fp, buf, sizeof(*buf), n - 1);
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if (r <= 0)
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return DXX_POISON_MEMORY(buf, buf + n, 0xcc), nullptr;
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char *p = buf;
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const auto cleanup = [&]{
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return *p = 0, DXX_POISON_MEMORY(p + 1, buf + n, 0xcc), p;
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};
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char *const e = &buf[r];
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for (;;)
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{
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if (p == e)
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{
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return cleanup();
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}
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char c = *p;
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if (c == 0)
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break;
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if (c == '\n')
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{
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break;
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}
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else if (c == '\r')
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{
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*p = 0;
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if (++p != e && *p != '\n')
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--p;
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break;
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}
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++p;
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}
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PHYSFS_seek(fp, PHYSFS_tell(fp) + p - e + 1);
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return cleanup();
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}
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int PHYSFSX_checkMatchingExtension(const char *filename, const partial_range_t<const file_extension_t *> range)
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{
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const char *ext = strrchr(filename, '.');
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if (!ext)
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return 0;
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++ext;
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// see if the file is of a type we want
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range_for (auto &k, range)
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{
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if (!d_stricmp(ext, k))
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return 1;
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}
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return 0;
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}
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}
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namespace dsx {
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// Initialise PhysicsFS, set up basic search paths and add arguments from .ini file.
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// The .ini file can be in either the user directory or the same directory as the program.
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// The user directory is searched first.
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bool PHYSFSX_init(int argc, char *argv[])
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{
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#if defined(__unix__) || defined(__APPLE__) || defined(__MACH__)
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char fullPath[PATH_MAX + 5];
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#endif
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#ifdef macintosh // Mac OS 9
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char base_dir[PATH_MAX];
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int bundle = 0;
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#else
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#define base_dir PHYSFS_getBaseDir()
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#endif
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if (!PHYSFS_init(argv[0]))
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Error("Failed to init PhysFS: %s", PHYSFS_getLastError());
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PHYSFS_permitSymbolicLinks(1);
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#ifdef macintosh
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strcpy(base_dir, PHYSFS_getBaseDir());
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if (strstr(base_dir, ".app:Contents:MacOSClassic")) // the Mac OS 9 program is still in the .app bundle
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{
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char *p;
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bundle = 1;
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if (base_dir[strlen(base_dir) - 1] == ':')
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base_dir[strlen(base_dir) - 1] = '\0';
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p = strrchr(base_dir, ':'); *p = '\0'; // path to 'Contents'
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p = strrchr(base_dir, ':'); *p = '\0'; // path to bundle
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p = strrchr(base_dir, ':'); *p = '\0'; // path to directory containing bundle
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}
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#endif
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#if (defined(__APPLE__) && defined(__MACH__)) // others?
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chdir(base_dir); // make sure relative hogdir paths work
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#endif
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const char *writedir;
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#if defined(__unix__)
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#if defined(DXX_BUILD_DESCENT_I)
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#define DESCENT_PATH_NUMBER "1"
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#elif defined(DXX_BUILD_DESCENT_II)
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#define DESCENT_PATH_NUMBER "2"
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#endif
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const auto &home_environ_var = "D" DESCENT_PATH_NUMBER "X_REBIRTH_HOME";
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const char *path = getenv(home_environ_var);
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if (!path)
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{
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path = getenv(&home_environ_var[4]);
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if (!path)
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# if !(defined(__APPLE__) && defined(__MACH__))
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path = "~/.d" DESCENT_PATH_NUMBER "x-rebirth/";
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# else
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path = "~/Library/Preferences/D" DESCENT_PATH_NUMBER "X Rebirth/";
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# endif
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}
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if (path[0] == '~') // yes, this tilde can be put before non-unix paths.
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{
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const char *home = PHYSFS_getUserDir();
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path++;
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// prepend home to the path
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if (*path == *PHYSFS_getDirSeparator())
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path++;
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snprintf(fullPath, sizeof(fullPath), "%s%s", home, path);
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}
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else
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{
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fullPath[sizeof(fullPath) - 1] = 0;
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strncpy(fullPath, path, sizeof(fullPath) - 1);
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}
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PHYSFS_setWriteDir(fullPath);
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if (!(writedir = PHYSFS_getWriteDir()))
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{ // need to make it
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char *p;
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char ancestor[PATH_MAX + 5]; // the directory which actually exists
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char child[PATH_MAX + 5]; // the directory relative to the above we're trying to make
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strcpy(ancestor, fullPath);
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const auto separator = *PHYSFS_getDirSeparator();
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while (!PHYSFS_getWriteDir() && (p = strrchr(ancestor, separator)))
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{
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if (p[1] == 0)
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{ // separator at the end (intended here, for safety)
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*p = 0; // kill this separator
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if (!(p = strrchr(ancestor, separator)))
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break; // give up, this is (usually) the root directory
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}
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p[1] = 0; // go to parent
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PHYSFS_setWriteDir(ancestor);
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}
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strcpy(child, fullPath + strlen(ancestor));
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if (separator != '/')
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for (p = child; (p = strchr(p, separator)); p++)
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*p = '/';
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PHYSFS_mkdir(child);
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PHYSFS_setWriteDir(fullPath);
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writedir = PHYSFS_getWriteDir();
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}
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con_printf(CON_DEBUG, "PHYSFS: append write directory \"%s\" to search path", writedir);
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PHYSFS_mount(writedir, nullptr, 1);
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#endif
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con_printf(CON_DEBUG, "PHYSFS: temporarily append base directory \"%s\" to search path", base_dir);
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PHYSFS_mount(base_dir, nullptr, 1);
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if (!InitArgs( argc,argv ))
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return false;
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PHYSFS_unmount(base_dir);
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if (!PHYSFS_getWriteDir())
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{
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PHYSFS_setWriteDir(base_dir);
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if (!(writedir = PHYSFS_getWriteDir()))
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Error("can't set write dir: %s\n", PHYSFS_getLastError());
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PHYSFS_mount(writedir, nullptr, 0);
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}
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//tell PHYSFS where hogdir is
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if (!CGameArg.SysHogDir.empty())
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{
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const auto p = CGameArg.SysHogDir.c_str();
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con_printf(CON_DEBUG, "PHYSFS: append argument hog directory \"%s\" to search path", p);
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PHYSFS_mount(p, nullptr, 1);
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}
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#if DXX_USE_SHAREPATH
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else if (!GameArg.SysNoHogDir)
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{
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con_puts(CON_DEBUG, "PHYSFS: append sharepath directory \"" DXX_SHAREPATH "\" to search path");
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PHYSFS_mount(DXX_SHAREPATH, nullptr, 1);
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}
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else
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{
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con_puts(CON_DEBUG, "PHYSFS: skipping built-in sharepath \"" DXX_SHAREPATH "\"");
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}
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#else
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else
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{
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con_puts(CON_DEBUG, "PHYSFS: no built-in sharepath");
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}
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#endif
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std::array<char, PATH_MAX> pathname;
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PHYSFSX_addRelToSearchPath("data", pathname, physfs_search_path::append); // 'Data' subdirectory
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// For Macintosh, add the 'Resources' directory in the .app bundle to the searchpaths
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#if defined(__APPLE__) && defined(__MACH__)
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{
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CFBundleRef mainBundle = CFBundleGetMainBundle();
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if (mainBundle)
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{
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CFURLRef resourcesURL = CFBundleCopyResourcesDirectoryURL(mainBundle);
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if (resourcesURL)
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{
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if (CFURLGetFileSystemRepresentation(resourcesURL, TRUE, reinterpret_cast<uint8_t *>(fullPath), sizeof(fullPath)))
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{
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con_printf(CON_DEBUG, "PHYSFS: append resources directory \"%s\" to search path", fullPath);
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PHYSFS_mount(fullPath, nullptr, 1);
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}
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CFRelease(resourcesURL);
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}
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}
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}
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#elif defined(macintosh)
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if (bundle)
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{
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base_dir[strlen(base_dir)] = ':'; // go back in the bundle
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base_dir[strlen(base_dir)] = ':'; // go back in 'Contents'
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strncat(base_dir, ":Resources:", PATH_MAX - 1 - strlen(base_dir));
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base_dir[PATH_MAX - 1] = '\0';
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con_printf(CON_DEBUG, "PHYSFS: append bundle directory \"%s\" to search path", base_dir);
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PHYSFS_mount(base_dir, nullptr, 1);
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}
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#endif
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return true;
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}
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#if defined(DXX_BUILD_DESCENT_II)
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RAIIPHYSFS_ComputedPathMount make_PHYSFSX_ComputedPathMount(const char *const name1, const char *const name2, physfs_search_path position)
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{
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auto pathname = std::make_unique<std::array<char, PATH_MAX>>();
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if (PHYSFSX_addRelToSearchPath(name1, *pathname.get(), position) == PHYSFS_ERR_OK ||
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PHYSFSX_addRelToSearchPath(name2, *pathname.get(), position) == PHYSFS_ERR_OK)
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return RAIIPHYSFS_ComputedPathMount(std::move(pathname));
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return nullptr;
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}
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#endif
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}
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namespace dcx {
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// Add a searchpath, but that searchpath is relative to an existing searchpath
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// It will add the first one it finds and return 1, if it doesn't find any it returns 0
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PHYSFS_ErrorCode PHYSFSX_addRelToSearchPath(const char *relname, std::array<char, PATH_MAX> &pathname, physfs_search_path add_to_end)
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{
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char relname2[PATH_MAX];
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snprintf(relname2, sizeof(relname2), "%s", relname);
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PHYSFSEXT_locateCorrectCase(relname2);
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if (!PHYSFSX_getRealPath(relname2, pathname))
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{
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/* This failure is not reported as an error, because callers
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* probe for files that users may not have, and do not need.
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*/
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con_printf(CON_DEBUG, "PHYSFS: ignoring map request: no canonical path for relative name \"%s\"", relname2);
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return PHYSFS_ERR_OK;
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}
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auto r = PHYSFS_mount(pathname.data(), nullptr, static_cast<int>(add_to_end));
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const auto action = add_to_end != physfs_search_path::prepend ? "append" : "insert";
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if (r)
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{
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con_printf(CON_DEBUG, "PHYSFS: %s canonical directory \"%s\" to search path from relative name \"%s\"", action, pathname.data(), relname);
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return PHYSFS_ERR_OK;
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}
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else
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{
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const auto err = PHYSFS_getLastErrorCode();
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con_printf(CON_VERBOSE, "PHYSFS: failed to %s canonical directory \"%s\" to search path from relative name \"%s\": \"%s\"", action, pathname.data(), relname, PHYSFS_getErrorByCode(err));
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return err;
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}
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}
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void PHYSFSX_removeRelFromSearchPath(const char *relname)
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{
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char relname2[PATH_MAX];
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snprintf(relname2, sizeof(relname2), "%s", relname);
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PHYSFSEXT_locateCorrectCase(relname2);
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std::array<char, PATH_MAX> pathname;
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if (!PHYSFSX_getRealPath(relname2, pathname))
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{
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con_printf(CON_DEBUG, "PHYSFS: ignoring unmap request: no canonical path for relative name \"%s\"", relname2);
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return;
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}
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auto r = PHYSFS_unmount(pathname.data());
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if (r)
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con_printf(CON_DEBUG, "PHYSFS: unmap canonical directory \"%s\" (relative name \"%s\")", pathname.data(), relname);
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else
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con_printf(CON_VERBOSE, "PHYSFS: failed to unmap canonical directory \"%s\" (relative name \"%s\"): \"%s\"", pathname.data(), relname, PHYSFS_getLastError());
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}
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int PHYSFSX_fsize(const char *hogname)
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{
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char hogname2[PATH_MAX];
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snprintf(hogname2, sizeof(hogname2), "%s", hogname);
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PHYSFSEXT_locateCorrectCase(hogname2);
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if (RAIIPHYSFS_File fp{PHYSFS_openRead(hogname2)})
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return PHYSFS_fileLength(fp);
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return -1;
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}
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void PHYSFSX_listSearchPathContent()
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{
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con_puts(CON_DEBUG, "PHYSFS: Listing contents of Search Path.");
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PHYSFSX_uncounted_list list{PHYSFS_getSearchPath()};
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range_for (const auto i, list)
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con_printf(CON_DEBUG, "PHYSFS: [%s] is in the Search Path.", i);
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list.reset();
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list.reset(PHYSFS_enumerateFiles(""));
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range_for (const auto i, list)
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con_printf(CON_DEBUG, "PHYSFS: * We've got [%s].", i);
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}
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}
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namespace dsx {
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// checks which archives are supported by PhysFS. Return 0 if some essential (HOG) is not supported
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int PHYSFSX_checkSupportedArchiveTypes()
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{
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int hog_sup = 0;
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#ifdef DXX_BUILD_DESCENT_II
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int mvl_sup = 0;
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#endif
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con_puts(CON_DEBUG, "PHYSFS: Checking supported archive types.");
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range_for (const auto i, make_null_sentinel_array(PHYSFS_supportedArchiveTypes()))
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{
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const auto iextension = i->extension;
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con_printf(CON_DEBUG, "PHYSFS: Supported archive: [%s], which is [%s].", iextension, i->description);
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if (!d_stricmp(iextension, "HOG"))
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hog_sup = 1;
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#ifdef DXX_BUILD_DESCENT_II
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else if (!d_stricmp(iextension, "MVL"))
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mvl_sup = 1;
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#endif
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}
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if (!hog_sup)
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con_puts(CON_CRITICAL, "PHYSFS: HOG not supported. The game will not work without!");
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#ifdef DXX_BUILD_DESCENT_II
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if (!mvl_sup)
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con_puts(CON_URGENT, "PHYSFS: MVL not supported. Won't be able to play movies!");
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#endif
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return hog_sup;
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}
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}
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namespace dcx {
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int PHYSFSX_getRealPath(const char *stdPath, std::array<char, PATH_MAX> &realPath)
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{
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DXX_POISON_MEMORY(realPath.data(), realPath.size(), 0xdd);
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const char *realDir = PHYSFS_getRealDir(stdPath);
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if (!realDir)
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{
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realDir = PHYSFS_getWriteDir();
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if (!realDir)
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return 0;
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}
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const auto realDirSize = strlen(realDir);
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if (realDirSize >= realPath.size())
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return 0;
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auto mountpoint = PHYSFS_getMountPoint(realDir);
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if (!mountpoint)
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return 0;
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std::copy_n(realDir, realDirSize + 1, realPath.begin());
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#ifdef _unix__
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auto &sep = "/";
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assert(!strcmp(PHYSFS_getDirSeparator(), sep));
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#else
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const auto sep = PHYSFS_getDirSeparator();
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#endif
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const auto sepSize = strlen(sep);
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auto realPathUsed = realDirSize;
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if (realDirSize >= sepSize)
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{
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const auto p = std::next(realPath.begin(), realDirSize - sepSize);
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if (strcmp(p, sep)) // no sep at end of realPath
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{
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realPathUsed += sepSize;
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std::copy_n(sep, sepSize, &realPath[realDirSize]);
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}
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}
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if (*mountpoint == '/')
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++mountpoint;
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if (*stdPath == '/')
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++stdPath;
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const auto ml = strlen(mountpoint);
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if (!strncmp(mountpoint, stdPath, ml))
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stdPath += ml;
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else
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{
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/* Virtual path is not under the virtual mount point that
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* provides the path.
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*/
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assert(false);
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}
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const auto stdPathLen = strlen(stdPath) + 1;
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if (realPathUsed + stdPathLen >= realPath.size())
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return 0;
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#ifdef __unix__
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/* Separator is "/" and physfs internal separator is "/". Copy
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* through.
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*/
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std::copy_n(stdPath, stdPathLen, &realPath[realPathUsed]);
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#else
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/* Separator might be / on non-unix, but the fallback path works
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* regardless of whether separator is "/".
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*/
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const auto csep = *sep;
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const auto a = [csep](char c) {
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return c == '/' ? csep : c;
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};
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std::transform(stdPath, &stdPath[stdPathLen], &realPath[realPathUsed], a);
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#endif
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return 1;
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}
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int PHYSFSX_rename(const char *oldpath, const char *newpath)
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{
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std::array<char, PATH_MAX> old, n;
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if (!PHYSFSX_getRealPath(oldpath, old) || !PHYSFSX_getRealPath(newpath, n))
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return -1;
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return (rename(old.data(), n.data()) == 0);
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}
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template <typename F>
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static inline PHYSFSX_uncounted_list PHYSFSX_findPredicateFiles(const char *path, F f)
|
|
{
|
|
PHYSFSX_uncounted_list list{PHYSFS_enumerateFiles(path)};
|
|
if (!list)
|
|
return nullptr; // out of memory: not so good
|
|
char **j = list.get();
|
|
range_for (const auto i, list)
|
|
{
|
|
if (f(i))
|
|
*j++ = i;
|
|
else
|
|
free(i);
|
|
}
|
|
*j = NULL;
|
|
char **r = reinterpret_cast<char **>(realloc(list.get(), (j - list.get() + 1)*sizeof(char *))); // save a bit of memory (or a lot?)
|
|
if (r)
|
|
{
|
|
list.release();
|
|
list.reset(r);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
// Find files at path that have an extension listed in exts
|
|
// The extension list exts must be NULL-terminated, with each ext beginning with a '.'
|
|
PHYSFSX_uncounted_list PHYSFSX_findFiles(const char *path, const partial_range_t<const file_extension_t *> exts)
|
|
{
|
|
const auto predicate = [&](const char *i) {
|
|
return PHYSFSX_checkMatchingExtension(i, exts);
|
|
};
|
|
return PHYSFSX_findPredicateFiles(path, predicate);
|
|
}
|
|
|
|
// Same function as above but takes a real directory as second argument, only adding files originating from this directory.
|
|
// This can be used to further seperate files in search path but it must be made sure realpath is properly formatted.
|
|
PHYSFSX_uncounted_list PHYSFSX_findabsoluteFiles(const char *path, const char *realpath, const partial_range_t<const file_extension_t *> exts)
|
|
{
|
|
const auto predicate = [&](const char *i) {
|
|
return PHYSFSX_checkMatchingExtension(i, exts) && (!strcmp(PHYSFS_getRealDir(i), realpath));
|
|
};
|
|
return PHYSFSX_findPredicateFiles(path, predicate);
|
|
}
|
|
|
|
int PHYSFSX_exists_ignorecase(const char *filename)
|
|
{
|
|
char filename2[PATH_MAX];
|
|
snprintf(filename2, sizeof(filename2), "%s", filename);
|
|
return !PHYSFSEXT_locateCorrectCase(filename2);
|
|
}
|
|
|
|
//Open a file for reading, set up a buffer
|
|
std::pair<RAIIPHYSFS_File, PHYSFS_ErrorCode> PHYSFSX_openReadBuffered(const char *filename)
|
|
{
|
|
PHYSFS_uint64 bufSize;
|
|
char filename2[PATH_MAX];
|
|
#if 0
|
|
if (filename[0] == '\x01')
|
|
{
|
|
//FIXME: don't look in dir, only in hogfile
|
|
filename++;
|
|
}
|
|
#endif
|
|
snprintf(filename2, sizeof(filename2), "%s", filename);
|
|
PHYSFSEXT_locateCorrectCase(filename2);
|
|
|
|
RAIIPHYSFS_File fp{PHYSFS_openRead(filename2)};
|
|
if (!fp)
|
|
return {nullptr, PHYSFS_getLastErrorCode()};
|
|
|
|
bufSize = PHYSFS_fileLength(fp);
|
|
while (!PHYSFS_setBuffer(fp, bufSize) && bufSize)
|
|
bufSize /= 2; // even if the error isn't memory full, for a 20MB file it'll only do this 8 times
|
|
return {std::move(fp), PHYSFS_ERR_OK};
|
|
}
|
|
|
|
//Open a file for writing, set up a buffer
|
|
std::pair<RAIIPHYSFS_File, PHYSFS_ErrorCode> PHYSFSX_openWriteBuffered(const char *filename)
|
|
{
|
|
PHYSFS_uint64 bufSize = 1024*1024; // hmm, seems like an OK size.
|
|
|
|
RAIIPHYSFS_File fp{PHYSFS_openWrite(filename)};
|
|
if (!fp)
|
|
return {nullptr, PHYSFS_getLastErrorCode()};
|
|
while (!PHYSFS_setBuffer(fp, bufSize) && bufSize)
|
|
bufSize /= 2;
|
|
return {std::move(fp), PHYSFS_ERR_OK};
|
|
}
|
|
|
|
/*
|
|
* Add archives to the game.
|
|
* 1) archives from Sharepath/Data to extend/replace builtin game content
|
|
* 2) archived demos
|
|
*/
|
|
void PHYSFSX_addArchiveContent()
|
|
{
|
|
int content_updated = 0;
|
|
|
|
con_puts(CON_DEBUG, "PHYSFS: Adding archives to the game.");
|
|
// find files in Searchpath ...
|
|
auto list = PHYSFSX_findFiles("", archive_exts);
|
|
// if found, add them...
|
|
range_for (const auto i, list)
|
|
{
|
|
std::array<char, PATH_MAX> realfile;
|
|
if (PHYSFSX_getRealPath(i, realfile) && PHYSFS_mount(realfile.data(), nullptr, 0))
|
|
{
|
|
con_printf(CON_DEBUG, "PHYSFS: Added %s to Search Path",realfile.data());
|
|
content_updated = 1;
|
|
}
|
|
}
|
|
#if PHYSFS_VER_MAJOR >= 2
|
|
list.reset();
|
|
// find files in DEMO_DIR ...
|
|
list = PHYSFSX_findFiles(DEMO_DIR, archive_exts);
|
|
// if found, add them...
|
|
range_for (const auto i, list)
|
|
{
|
|
char demofile[PATH_MAX];
|
|
snprintf(demofile, sizeof(demofile), DEMO_DIR "%s", i);
|
|
std::array<char, PATH_MAX> realfile;
|
|
if (PHYSFSX_getRealPath(demofile, realfile) && PHYSFS_mount(realfile.data(), DEMO_DIR, 0))
|
|
{
|
|
con_printf(CON_DEBUG, "PHYSFS: Added %s to " DEMO_DIR, realfile.data());
|
|
content_updated = 1;
|
|
}
|
|
}
|
|
#endif
|
|
list.reset();
|
|
|
|
if (content_updated)
|
|
{
|
|
con_puts(CON_DEBUG, "Game content updated!");
|
|
PHYSFSX_listSearchPathContent();
|
|
}
|
|
}
|
|
|
|
// Removes content added above when quitting game
|
|
void PHYSFSX_removeArchiveContent()
|
|
{
|
|
// find files in Searchpath ...
|
|
auto list = PHYSFSX_findFiles("", archive_exts);
|
|
// if found, remove them...
|
|
range_for (const auto i, list)
|
|
{
|
|
std::array<char, PATH_MAX> realfile;
|
|
if (PHYSFSX_getRealPath(i, realfile))
|
|
PHYSFS_unmount(realfile.data());
|
|
}
|
|
list.reset();
|
|
// find files in DEMO_DIR ...
|
|
list = PHYSFSX_findFiles(DEMO_DIR, archive_exts);
|
|
// if found, remove them...
|
|
range_for (const auto i, list)
|
|
{
|
|
char demofile[PATH_MAX];
|
|
snprintf(demofile, sizeof(demofile), DEMO_DIR "%s", i);
|
|
std::array<char, PATH_MAX> realfile;
|
|
if (PHYSFSX_getRealPath(demofile, realfile))
|
|
PHYSFS_unmount(realfile.data());
|
|
}
|
|
}
|
|
|
|
void PHYSFSX_read_helper_report_error(const char *const filename, const unsigned line, const char *const func, PHYSFS_File *const file)
|
|
{
|
|
(Error)(filename, line, func, "reading at %lu", static_cast<unsigned long>((PHYSFS_tell)(file)));
|
|
}
|
|
|
|
RAIIPHYSFS_ComputedPathMount make_PHYSFSX_ComputedPathMount(const char *const name, physfs_search_path position)
|
|
{
|
|
auto pathname = std::make_unique<std::array<char, PATH_MAX>>();
|
|
if (PHYSFSX_addRelToSearchPath(name, *pathname.get(), position) == PHYSFS_ERR_OK)
|
|
return RAIIPHYSFS_ComputedPathMount(std::move(pathname));
|
|
return nullptr;
|
|
}
|
|
|
|
}
|