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fteqw/engine/common/fs_stdio.c
Spoike e598d136b9 grr. 
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@6012 fc73d0e0-1445-4013-8a0c-d673dee63da5
2021-08-05 17:12:41 +00:00

481 lines
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C
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#include "quakedef.h"
#include "fs.h"
#include "errno.h"
#if !defined(NACL) && !defined(FTE_TARGET_WEB) && (!defined(_WIN32) || defined(FTE_SDL))
#ifdef WEBSVONLY
#define Z_Free free
#define Z_Malloc malloc
#else
#if !defined(_WIN32) || defined(FTE_SDL) || defined(WINRT) || defined(_XBOX)
#define FSSTDIO_OpenPath VFSOS_OpenPath
#endif
#define FSSTDIO_OpenTemp FS_OpenTemp
#endif
typedef struct {
searchpathfuncs_t pub;
int depth;
void (QDECL *AddFileHash)(int depth, const char *fname, fsbucket_t *filehandle, void *pathhandle);
char rootpath[1];
} stdiopath_t;
typedef struct {
vfsfile_t funcs;
FILE *handle;
} vfsstdiofile_t;
static int QDECL VFSSTDIO_ReadBytes (struct vfsfile_s *file, void *buffer, int bytestoread)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
return fread(buffer, 1, bytestoread, intfile->handle);
}
static int QDECL VFSSTDIO_WriteBytes (struct vfsfile_s *file, const void *buffer, int bytestoread)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
return fwrite(buffer, 1, bytestoread, intfile->handle);
}
static qboolean QDECL VFSSTDIO_Seek (struct vfsfile_s *file, qofs_t pos)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
#ifdef __USE_LARGEFILE64
return fseeko64(intfile->handle, (off64_t)pos, SEEK_SET) == 0;
#elif _POSIX_C_SOURCE >= 200112L
return fseeko(intfile->handle, (off_t)pos, SEEK_SET) == 0;
#else
return fseek(intfile->handle, pos, SEEK_SET) == 0;
#endif
}
static qofs_t QDECL VFSSTDIO_Tell (struct vfsfile_s *file)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
#ifdef __USE_LARGEFILE64
return (qofs_t)ftello64(intfile->handle);
#elif _POSIX_C_SOURCE >= 200112L
return (qofs_t)ftello(intfile->handle);
#else
return ftell(intfile->handle);
#endif
}
static void QDECL VFSSTDIO_Flush(struct vfsfile_s *file)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
fflush(intfile->handle);
}
static qofs_t QDECL VFSSTDIO_GetSize (struct vfsfile_s *file)
{
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
#ifdef __USE_LARGEFILE64
off64_t curpos;
qofs_t maxlen;
curpos = ftello64(intfile->handle);
fseeko64(intfile->handle, 0, SEEK_END);
maxlen = (qofs_t)ftello64(intfile->handle);
fseeko64(intfile->handle, curpos, SEEK_SET);
#elif _POSIX_C_SOURCE >= 200112L
off_t curpos;
qofs_t maxlen;
curpos = ftello(intfile->handle);
fseeko(intfile->handle, 0, SEEK_END);
maxlen = (qofs_t)ftello(intfile->handle);
fseeko(intfile->handle, curpos, SEEK_SET);
#else
unsigned int curpos;
unsigned int maxlen;
curpos = ftell(intfile->handle);
fseek(intfile->handle, 0, SEEK_END);
maxlen = ftell(intfile->handle);
fseek(intfile->handle, curpos, SEEK_SET);
#endif
return maxlen;
}
static qboolean QDECL VFSSTDIO_Close(vfsfile_t *file)
{
qboolean success;
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
success = !ferror(intfile->handle);
fclose(intfile->handle);
Z_Free(file);
return success;
}
#ifdef _WIN32
static qboolean QDECL VFSSTDIO_CloseTemp(vfsfile_t *file)
{
qboolean success;
vfsstdiofile_t *intfile = (vfsstdiofile_t*)file;
char *fname = (char*)(intfile+1);
success = !ferror(intfile->handle);
fclose(intfile->handle);
_unlink(fname);
Z_Free(file);
return success;
}
#endif
vfsfile_t *FSSTDIO_OpenTemp(void)
{
FILE *f;
vfsstdiofile_t *file;
#ifdef _WIN32
/*microsoft's tmpfile will nearly always fail, as it insists on writing to the root directory and that requires running everything with full admin rights.
warning: there's a race condition between tempnam and fopen. if the file is not opened exclusively then we can end up with issues
on windows, fopen is typically exclusive anyway, but not on unix. but on unix, tmpfile is actually usable, so special-case the windows code
we also have a special close function to ensure the file is deleted too
*/
char *fname = _tempnam(NULL, "ftemp");
f = fopen(fname, "w+b");
if (!f)
return NULL;
file = Z_Malloc(sizeof(vfsstdiofile_t) + strlen(fname)+1);
file->funcs.Close = VFSSTDIO_CloseTemp;
strcpy((char*)(file+1), fname);
free(fname);
#else
#ifdef __USE_LARGEFILE64
f = tmpfile64();
#else
f = tmpfile();
#endif
if (!f)
return NULL;
file = Z_Malloc(sizeof(vfsstdiofile_t));
file->funcs.Close = VFSSTDIO_Close;
#endif
#ifdef _DEBUG
Q_strncpyz(file->funcs.dbgname, "FSSTDIO_OpenTemp", sizeof(file->funcs.dbgname));
#endif
file->funcs.ReadBytes = VFSSTDIO_ReadBytes;
file->funcs.WriteBytes = VFSSTDIO_WriteBytes;
file->funcs.Seek = VFSSTDIO_Seek;
file->funcs.Tell = VFSSTDIO_Tell;
file->funcs.GetLen = VFSSTDIO_GetSize;
file->funcs.Flush = VFSSTDIO_Flush;
file->handle = f;
return (vfsfile_t*)file;
}
#if 0//def ANDROID
vfsfile_t *Sys_OpenAsset(const char *fname);
#endif
vfsfile_t *VFSSTDIO_Open(const char *osname, const char *mode, qboolean *needsflush)
{
FILE *f;
vfsstdiofile_t *file;
qboolean read = !!strchr(mode, 'r');
qboolean write = !!strchr(mode, 'w');
qboolean append = !!strchr(mode, 'a');
qboolean text = !!strchr(mode, 't');
// qboolean dolock = !!strchr(mode, 'l');
char newmode[5];
int modec = 0;
if (needsflush)
*needsflush = false;
#if 0//def ANDROID
// if (!strncmp("asset/", osname, 6))
{
if (append || write)
return NULL;
return Sys_OpenAsset(osname);
}
#endif
if (read)
newmode[modec++] = 'r';
if (write)
newmode[modec++] = 'w';
if (append)
newmode[modec++] = 'a';
// if (append)
// newmode[modec++] = '+';
if (text)
newmode[modec++] = 't';
else
newmode[modec++] = 'b';
#ifdef __linux__
newmode[modec++] = 'e'; //otherwise forks get messy.
#endif
newmode[modec++] = '\0';
#ifdef __USE_LARGEFILE64
f = fopen64(osname, newmode);
#else
f = fopen(osname, newmode);
#endif
if (!f)
return NULL;
if (write || append)
{
if (needsflush)
*needsflush = true;
}
file = Z_Malloc(sizeof(vfsstdiofile_t));
#ifdef _DEBUG
Q_strncpyz(file->funcs.dbgname, osname, sizeof(file->funcs.dbgname));
#endif
file->funcs.ReadBytes = VFSSTDIO_ReadBytes;
file->funcs.WriteBytes = VFSSTDIO_WriteBytes;
file->funcs.Seek = VFSSTDIO_Seek;
file->funcs.Tell = VFSSTDIO_Tell;
file->funcs.GetLen = VFSSTDIO_GetSize;
file->funcs.Close = VFSSTDIO_Close;
file->funcs.Flush = VFSSTDIO_Flush;
file->handle = f;
return (vfsfile_t*)file;
}
#ifndef WEBSVONLY
#if !defined(_WIN32) || defined(FTE_SDL) || defined(WINRT) || defined(_XBOX)
vfsfile_t *VFSOS_Open(const char *osname, const char *mode)
{
vfsfile_t *f;
qboolean needsflush;
f = VFSSTDIO_Open(osname, mode, &needsflush);
if (needsflush)
FS_FlushFSHashFull();
return f;
}
#endif
static vfsfile_t *QDECL FSSTDIO_OpenVFS(searchpathfuncs_t *handle, flocation_t *loc, const char *mode)
{
vfsfile_t *f;
stdiopath_t *sp = (void*)handle;
qboolean needsflush;
f = VFSSTDIO_Open(loc->rawname, mode, &needsflush);
if (needsflush && sp->AddFileHash)
sp->AddFileHash(sp->depth, loc->rawname, NULL, sp);
return f;
}
static void QDECL FSSTDIO_ClosePath(searchpathfuncs_t *handle)
{
Z_Free(handle);
}
static qboolean QDECL FSSTDIO_PollChanges(searchpathfuncs_t *handle)
{
// stdiopath_t *np = handle;
return true; //can't verify that or not, so we have to assume the worst
}
static int QDECL FSSTDIO_RebuildFSHash(const char *filename, qofs_t filesize, time_t mtime, void *data, searchpathfuncs_t *spath)
{
stdiopath_t *sp = (void*)spath;
void (QDECL *AddFileHash)(int depth, const char *fname, fsbucket_t *filehandle, void *pathhandle) = data;
if (filename[strlen(filename)-1] == '/')
{ //this is actually a directory
char childpath[256];
if (!Q_snprintfz(childpath, sizeof(childpath), "%s*", filename))
Sys_EnumerateFiles(sp->rootpath, childpath, FSSTDIO_RebuildFSHash, data, spath);
return true;
}
AddFileHash(sp->depth, filename, NULL, sp);
return true;
}
static void QDECL FSSTDIO_BuildHash(searchpathfuncs_t *handle, int depth, void (QDECL *AddFileHash)(int depth, const char *fname, fsbucket_t *filehandle, void *pathhandle))
{
stdiopath_t *sp = (void*)handle;
sp->depth = depth;
sp->AddFileHash = AddFileHash;
Sys_EnumerateFiles(sp->rootpath, "*", FSSTDIO_RebuildFSHash, AddFileHash, handle);
}
static unsigned int QDECL FSSTDIO_CreateLoc(searchpathfuncs_t *handle, flocation_t *loc, const char *filename)
{
stdiopath_t *sp = (void*)handle;
char *ofs;
loc->len = 0;
loc->offset = 0;
loc->fhandle = handle;
if (Q_snprintfz(loc->rawname, sizeof(loc->rawname), "%s/%s", sp->rootpath, filename))
return FF_NOTFOUND; //too long...
for (ofs = loc->rawname+1 ; *ofs ; ofs++)
{
if (*ofs == '/')
{ // create the directory
*ofs = 0;
Sys_mkdir (loc->rawname);
*ofs = '/';
}
}
return FF_FOUND;
}
static unsigned int QDECL FSSTDIO_FLocate(searchpathfuncs_t *handle, flocation_t *loc, const char *filename, void *hashedresult)
{
stdiopath_t *sp = (void*)handle;
qofs_t len;
char netpath[MAX_OSPATH];
if (hashedresult && (void *)hashedresult != handle)
return FF_NOTFOUND;
/*
if (!static_registered)
{ // if not a registered version, don't ever go beyond base
if ( strchr (filename, '/') || strchr (filename,'\\'))
continue;
}
*/
// check a file in the directory tree
if (Q_snprintfz (netpath, sizeof(netpath), "%s/%s", sp->rootpath, filename))
return FF_NOTFOUND;
#if 0//def ANDROID
{
vfsfile_t *f = VFSSTDIO_Open(netpath, "rb", NULL);
if (!f)
return false;
len = VFS_GETLEN(f);
VFS_CLOSE(f);
}
#else
{
#ifdef __USE_LARGEFILE64
FILE *f = fopen64(netpath, "rb");
#else
FILE *f = fopen(netpath, "rb");
#endif
if (!f)
return FF_NOTFOUND;
#ifdef __USE_LARGEFILE64
fseeko64(f, 0, SEEK_END);
len = ftello64(f);
#elif _POSIX_C_SOURCE >= 200112L
fseeko(f, 0, SEEK_END);
len = ftello(f);
#else
fseek(f, 0, SEEK_END);
len = ftell(f);
#endif
fclose(f);
}
#endif
if (loc)
{
loc->len = len;
loc->offset = 0;
loc->fhandle = handle;
Q_strncpyz(loc->rawname, netpath, sizeof(loc->rawname));
}
return FF_FOUND;
}
static void QDECL FSSTDIO_ReadFile(searchpathfuncs_t *handle, flocation_t *loc, char *buffer)
{
FILE *f;
size_t result;
#ifdef __USE_LARGEFILE64
f = fopen64(loc->rawname, "rb");
#else
f = fopen(loc->rawname, "rb");
#endif
if (!f) //err...
return;
#ifdef __USE_LARGEFILE64
fseeko64(f, loc->offset, SEEK_SET);
#elif _POSIX_C_SOURCE >= 200112L
fseeko(f, loc->offset, SEEK_SET);
#else
fseek(f, loc->offset, SEEK_SET);
#endif
result = fread(buffer, 1, loc->len, f); // do soemthing with result
if (result != loc->len)
Con_Printf("FSSTDIO_ReadFile() fread: Filename: %s, expected %u, result was %u (%s)\n",loc->rawname,(unsigned int)loc->len,(unsigned int)result,strerror(errno));
fclose(f);
}
static int QDECL FSSTDIO_EnumerateFiles (searchpathfuncs_t *handle, const char *match, int (QDECL *func)(const char *, qofs_t, time_t mtime, void *, searchpathfuncs_t *spath), void *parm)
{
stdiopath_t *sp = (stdiopath_t*)handle;
return Sys_EnumerateFiles(sp->rootpath, match, func, parm, handle);
}
#include <sys/stat.h>
static qboolean QDECL FSSTDIO_FileStat (searchpathfuncs_t *handle, flocation_t *loc, time_t *mtime)
{
struct stat s;
if (stat(loc->rawname, &s) != -1)
{
*mtime = s.st_mtime;
return true;
}
return false;
}
static qboolean QDECL FSSTDIO_RenameFile(searchpathfuncs_t *handle, const char *oldname, const char *newname)
{
stdiopath_t *sp = (void*)handle;
char oldsyspath[MAX_OSPATH];
char newsyspath[MAX_OSPATH];
if (fs_readonly)
return false;
if (Q_snprintfz (oldsyspath, sizeof(oldsyspath), "%s/%s", sp->rootpath, oldname))
return false; //too long
if (Q_snprintfz (newsyspath, sizeof(newsyspath), "%s/%s", sp->rootpath, newname))
return false; //too long
return Sys_Rename(oldsyspath, newsyspath);
}
static qboolean QDECL FSSTDIO_RemoveFile(searchpathfuncs_t *handle, const char *filename)
{
stdiopath_t *sp = (void*)handle;
char syspath[MAX_OSPATH];
if (fs_readonly)
return false;
if (Q_snprintfz (syspath, sizeof(syspath), "%s/%s", sp->rootpath, filename))
return false; //too long
if (*filename && filename[strlen(filename)-1] == '/')
return Sys_rmdir(syspath);
return Sys_remove(syspath);
}
searchpathfuncs_t *QDECL FSSTDIO_OpenPath(vfsfile_t *mustbenull, searchpathfuncs_t *parent, const char *filename, const char *desc, const char *prefix)
{
stdiopath_t *np;
int dlen = strlen(desc);
if (mustbenull)
return NULL;
if (prefix && *prefix)
return NULL; //don't try to support this. too risky with absolute paths etc.
np = Z_Malloc(sizeof(*np) + dlen);
if (np)
{
np->depth = 0;
memcpy(np->rootpath, desc, dlen+1);
}
np->pub.fsver = FSVER;
np->pub.ClosePath = FSSTDIO_ClosePath;
np->pub.BuildHash = FSSTDIO_BuildHash;
np->pub.FindFile = FSSTDIO_FLocate;
np->pub.ReadFile = FSSTDIO_ReadFile;
np->pub.EnumerateFiles = FSSTDIO_EnumerateFiles;
np->pub.OpenVFS = FSSTDIO_OpenVFS;
np->pub.PollChanges = FSSTDIO_PollChanges;
np->pub.FileStat = FSSTDIO_FileStat;
np->pub.CreateFile = FSSTDIO_CreateLoc;
np->pub.RenameFile = FSSTDIO_RenameFile;
np->pub.RemoveFile = FSSTDIO_RemoveFile;
return &np->pub;
}
#endif
#endif
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