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filesytem: sort files in paks and use binary search

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This commit is contained in:
Denis Pauk 2024-07-30 14:16:58 +03:00
parent 8520285a10
commit 0293e946ca
1 changed files with 138 additions and 103 deletions
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167
src/common/filesystem.c
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@ -98,9 +98,9 @@ typedef struct
} fsPackTypes_t; } fsPackTypes_t;
fsHandle_t fs_handles[MAX_HANDLES]; fsHandle_t fs_handles[MAX_HANDLES];
fsLink_t *fs_links; fsLink_t *fs_links = NULL;
fsSearchPath_t *fs_searchPaths; fsSearchPath_t *fs_searchPaths = NULL;
fsSearchPath_t *fs_baseSearchPaths; fsSearchPath_t *fs_baseSearchPaths = NULL;
/* Pack formats / suffixes. */ /* Pack formats / suffixes. */
fsPackTypes_t fs_packtypes[] = { fsPackTypes_t fs_packtypes[] = {
@ -197,36 +197,7 @@ static voidpf ZCALLBACK fopen_file_func_utf(voidpf opaque, const char *filename,
* *
*/ */
/* static int
* Returns the path up to, but not including the last '/'.
*/
void
Com_FilePath(const char *path, char *dst, int dstSize)
{
char *pos; /* Position of the last '/'. */
if ((pos = strrchr(path, '/')) != NULL)
{
pos--;
if ((pos - path) < dstSize)
{
memcpy(dst, path, pos - path);
dst[pos - path] = '\0';
}
else
{
Com_Printf("Com_FilePath: not enough space.\n");
return;
}
}
else
{
Q_strlcpy(dst, path, dstSize);
}
}
int
FS_FileLength(FILE *f) FS_FileLength(FILE *f)
{ {
int pos; /* Current position. */ int pos; /* Current position. */
@ -300,7 +271,7 @@ FS_Gamedir(void)
/* /*
* Finds a free fileHandle_t. * Finds a free fileHandle_t.
*/ */
fsHandle_t * static fsHandle_t *
FS_HandleForFile(const char *path, fileHandle_t *f) FS_HandleForFile(const char *path, fileHandle_t *f)
{ {
int i; int i;
@ -319,7 +290,7 @@ FS_HandleForFile(const char *path, fileHandle_t *f)
} }
/* Failed. */ /* Failed. */
Com_Error(ERR_DROP, "FS_HandleForFile: none free"); Com_Error(ERR_DROP, "%s: none free", __func__);
return NULL; return NULL;
} }
@ -332,7 +303,7 @@ FS_GetFileByHandle(fileHandle_t f)
{ {
if ((f < 0) || (f > MAX_HANDLES)) if ((f < 0) || (f > MAX_HANDLES))
{ {
Com_Error(ERR_DROP, "FS_GetFileByHandle: out of range"); Com_Error(ERR_DROP, "%s: out of range", __func__);
} }
if (f == 0) if (f == 0)
@ -366,6 +337,54 @@ FS_FCloseFile(fileHandle_t f)
memset(handle, 0, sizeof(*handle)); memset(handle, 0, sizeof(*handle));
} }
static int
FS_SortPackCompare(const void *p1, const void *p2)
{
fsPackFile_t *file1, *file2;
file1 = (fsPackFile_t*)p1;
file2 = (fsPackFile_t*)p2;
return Q_stricmp(file1->name, file2->name);
}
static void
FS_SortPack(fsPack_t *pak)
{
qsort(pak->files, pak->numFiles, sizeof(fsPackFile_t), FS_SortPackCompare);
}
static int
FS_PackQuickSearch(const fsPack_t *pak, const char *name)
{
int start, end;
start = 0;
end = pak->numFiles - 1;
while (start <= end)
{
int i, res;
i = start + (end - start) / 2;
res = Q_stricmp(pak->files[i].name, name);
if (res == 0)
{
return i;
}
else if (res < 0)
{
start = i + 1;
}
else
{
end = i - 1;
}
}
return -1;
}
/* /*
* Finds the file in the search path. Returns filesize and an open FILE *. Used * Finds the file in the search path. Returns filesize and an open FILE *. Used
* for streaming data out of either a pak file or a seperate file. * for streaming data out of either a pak file or a seperate file.
@ -377,14 +396,14 @@ FS_FOpenFile(const char *rawname, fileHandle_t *f, qboolean gamedir_only)
fsHandle_t *handle; fsHandle_t *handle;
fsPack_t *pack; fsPack_t *pack;
fsSearchPath_t *search; fsSearchPath_t *search;
int i; int input, output;
// Remove self references and empty dirs from the requested path. // Remove self references and empty dirs from the requested path.
// ZIPs and PAKs don't support them, but they may be hardcoded in // ZIPs and PAKs don't support them, but they may be hardcoded in
// some custom maps or models. // some custom maps or models.
char name[MAX_QPATH] = {0}; char name[MAX_QPATH] = {0};
size_t namelen = strlen(rawname); size_t namelen = strlen(rawname);
for (int input = 0, output = 0; input < namelen; input++) for (input = 0, output = 0; input < namelen; input++)
{ {
// Remove self reference. // Remove self reference.
if (rawname[input] == '.') if (rawname[input] == '.')
@ -458,17 +477,18 @@ FS_FOpenFile(const char *rawname, fileHandle_t *f, qboolean gamedir_only)
/* Search inside a pack file. */ /* Search inside a pack file. */
if (search->pack) if (search->pack)
{ {
pack = search->pack; int i;
for (i = 0; i < pack->numFiles; i++) pack = search->pack;
{ i = FS_PackQuickSearch(pack, handle->name);
if (Q_stricmp(pack->files[i].name, handle->name) == 0)
if (i >= 0)
{ {
/* Found it! */ /* Found it! */
if (fs_debug->value) if (fs_debug->value)
{ {
Com_Printf("FS_FOpenFile: '%s' (found in '%s').\n", Com_Printf("%s: '%s' (found in '%s').\n",
handle->name, pack->name); __func__, handle->name, pack->name);
} }
// save the name with *correct case* in the handle // save the name with *correct case* in the handle
@ -523,7 +543,6 @@ FS_FOpenFile(const char *rawname, fileHandle_t *f, qboolean gamedir_only)
Com_Error(ERR_FATAL, "Couldn't reopen '%s'", pack->name); Com_Error(ERR_FATAL, "Couldn't reopen '%s'", pack->name);
} }
} }
}
else else
{ {
/* Search in a directory tree. */ /* Search in a directory tree. */
@ -543,8 +562,8 @@ FS_FOpenFile(const char *rawname, fileHandle_t *f, qboolean gamedir_only)
{ {
if (fs_debug->value) if (fs_debug->value)
{ {
Com_Printf("FS_FOpenFile: '%s' (found in '%s').\n", Com_Printf("%s: '%s' (found in '%s').\n",
handle->name, search->path); __func__, handle->name, search->path);
} }
return FS_FileLength(handle->file); return FS_FileLength(handle->file);
@ -553,7 +572,7 @@ FS_FOpenFile(const char *rawname, fileHandle_t *f, qboolean gamedir_only)
} }
if (fs_debug->value) if (fs_debug->value)
{ {
Com_Printf("FS_FOpenFile: couldn't find '%s'.\n", handle->name); Com_Printf("%s: couldn't find '%s'.\n", __func__, handle->name);
} }
/* Couldn't open, so free the handle. */ /* Couldn't open, so free the handle. */
@ -605,13 +624,15 @@ FS_Read(void *buffer, int size, fileHandle_t f)
else else
{ {
/* Already tried once. */ /* Already tried once. */
Com_Error(ERR_FATAL, "FS_Read: 0 bytes read from '%s'", handle->name); Com_Error(ERR_FATAL, "%s: 0 bytes read from '%s'",
__func__, handle->name);
return size - remaining; return size - remaining;
} }
} }
else if (r == -1) else if (r == -1)
{ {
Com_Error(ERR_FATAL, "FS_Read: -1 bytes read from '%s'", handle->name); Com_Error(ERR_FATAL, "%s: -1 bytes read from '%s'",
__func__, handle->name);
} }
remaining -= r; remaining -= r;
@ -677,8 +698,8 @@ FS_FRead(void *buffer, int size, int count, fileHandle_t f)
else if (r == -1) else if (r == -1)
{ {
Com_Error(ERR_FATAL, Com_Error(ERR_FATAL,
"FS_FRead: -1 bytes read from '%s'", "%s: -1 bytes read from '%s'",
handle->name); __func__, handle->name);
} }
remaining -= r; remaining -= r;
@ -742,7 +763,8 @@ FS_FreeFile(void *buffer)
Z_Free(buffer); Z_Free(buffer);
} }
fsRawPath_t *FS_FreeRawPaths(fsRawPath_t *start, fsRawPath_t *end) static fsRawPath_t *
FS_FreeRawPaths(fsRawPath_t *start, fsRawPath_t *end)
{ {
fsRawPath_t *cur = start; fsRawPath_t *cur = start;
fsRawPath_t *next; fsRawPath_t *next;
@ -757,7 +779,8 @@ fsRawPath_t *FS_FreeRawPaths(fsRawPath_t *start, fsRawPath_t *end)
return cur; return cur;
} }
fsSearchPath_t *FS_FreeSearchPaths(fsSearchPath_t *start, fsSearchPath_t *end) static fsSearchPath_t *
FS_FreeSearchPaths(fsSearchPath_t *start, fsSearchPath_t *end)
{ {
fsSearchPath_t *cur = start; fsSearchPath_t *cur = start;
fsSearchPath_t *next; fsSearchPath_t *next;
@ -853,7 +876,8 @@ FS_LoadPAK(const char *packPath)
/* Parse the directory. */ /* Parse the directory. */
for (i = 0; i < numFiles; i++) for (i = 0; i < numFiles; i++)
{ {
Q_strlcpy(files[i].name, info[i].name, sizeof(files[i].name)); Q_strlcpy(files[i].name, info[i].name,
Q_min(sizeof(files[i].name), sizeof(files[i].name)));
files[i].offset = LittleLong(info[i].filepos); files[i].offset = LittleLong(info[i].filepos);
files[i].size = LittleLong(info[i].filelen); files[i].size = LittleLong(info[i].filelen);
} }
@ -877,7 +901,7 @@ FS_LoadPAK(const char *packPath)
* Loads the header and directory, adding the files at the beginning of the list * Loads the header and directory, adding the files at the beginning of the list
* so they override previous pack files. * so they override previous pack files.
*/ */
fsPack_t * static fsPack_t *
FS_LoadPK3(const char *packPath) FS_LoadPK3(const char *packPath)
{ {
char fileName[MAX_QPATH]; /* File name. */ char fileName[MAX_QPATH]; /* File name. */
@ -904,7 +928,7 @@ FS_LoadPK3(const char *packPath)
if (unzGetGlobalInfo(handle, &global) != UNZ_OK) if (unzGetGlobalInfo(handle, &global) != UNZ_OK)
{ {
unzClose(handle); unzClose(handle);
Com_Error(ERR_FATAL, "FS_LoadPK3: '%s' is not a pack file", packPath); Com_Error(ERR_FATAL, "%s: '%s' is not a pack file", __func__, packPath);
} }
numFiles = global.number_entry; numFiles = global.number_entry;
@ -924,7 +948,7 @@ FS_LoadPK3(const char *packPath)
while (status == UNZ_OK) while (status == UNZ_OK)
{ {
fileName[0] = '\0'; fileName[0] = '\0';
unzGetCurrentFileInfo(handle, &info, fileName, MAX_QPATH, unzGetCurrentFileInfo(handle, &info, fileName, sizeof(fileName),
NULL, 0, NULL, 0); NULL, 0, NULL, 0);
Q_strlcpy(files[i].name, fileName, sizeof(files[i].name)); Q_strlcpy(files[i].name, fileName, sizeof(files[i].name));
files[i].offset = -1; /* Not used in ZIP files */ files[i].offset = -1; /* Not used in ZIP files */
@ -979,7 +1003,7 @@ FS_NextPath(char *prevPath)
return NULL; return NULL;
} }
void static void
FS_Path_f(void) FS_Path_f(void)
{ {
int i; int i;
@ -1035,7 +1059,7 @@ FS_Path_f(void)
/* /*
* Creates a filelink_t. * Creates a filelink_t.
*/ */
void static void
FS_Link_f(void) FS_Link_f(void)
{ {
fsLink_t *l, **prev; fsLink_t *l, **prev;
@ -1149,7 +1173,7 @@ FS_ListFiles(char *findname, int *numfiles,
* attributes then a copy of the matching string will be placed there (with * attributes then a copy of the matching string will be placed there (with
* SFF_SUBDIR it changes). * SFF_SUBDIR it changes).
*/ */
qboolean static qboolean
ComparePackFiles(const char *findname, const char *name, unsigned musthave, ComparePackFiles(const char *findname, const char *name, unsigned musthave,
unsigned canthave, char *output, int size) unsigned canthave, char *output, int size)
{ {
@ -1495,7 +1519,7 @@ FS_ListMods(int *nummods)
/* /*
* Directory listing. * Directory listing.
*/ */
void static void
FS_Dir_f(void) FS_Dir_f(void)
{ {
char **dirnames; /* File list. */ char **dirnames; /* File list. */
@ -1617,8 +1641,12 @@ FS_AddPAKFromGamedir(const char *pak)
} }
else else
{ {
fsSearchPath_t *search;
FS_SortPack(pakfile);
// Add it. // Add it.
fsSearchPath_t *search = Z_Malloc(sizeof(fsSearchPath_t)); search = Z_Malloc(sizeof(fsSearchPath_t));
search->pack = pakfile; search->pack = pakfile;
search->next = fs_searchPaths; search->next = fs_searchPaths;
fs_searchPaths = search; fs_searchPaths = search;
@ -1671,7 +1699,7 @@ static char* basename( char* n )
} }
#endif // _MSC_VER #endif // _MSC_VER
void static void
FS_AddDirToSearchPath(char *dir, qboolean create) { FS_AddDirToSearchPath(char *dir, qboolean create) {
char *file; char *file;
char **list; char **list;
@ -1745,6 +1773,8 @@ FS_AddDirToSearchPath(char *dir, qboolean create) {
continue; continue;
} }
FS_SortPack(pack);
search = Z_Malloc(sizeof(fsSearchPath_t)); search = Z_Malloc(sizeof(fsSearchPath_t));
search->pack = pack; search->pack = pack;
search->next = fs_searchPaths; search->next = fs_searchPaths;
@ -1813,6 +1843,8 @@ FS_AddDirToSearchPath(char *dir, qboolean create) {
continue; continue;
} }
FS_SortPack(pack);
pack->isProtectedPak = false; pack->isProtectedPak = false;
search = Z_Malloc(sizeof(fsSearchPath_t)); search = Z_Malloc(sizeof(fsSearchPath_t));
@ -1825,7 +1857,8 @@ FS_AddDirToSearchPath(char *dir, qboolean create) {
} }
} }
void FS_BuildGenericSearchPath(void) { static void
FS_BuildGenericSearchPath(void) {
// We may not use the va() function from shared.c // We may not use the va() function from shared.c
// since it's buffersize is 1024 while most OS have // since it's buffersize is 1024 while most OS have
// a maximum path size of 4096... // a maximum path size of 4096...
@ -2056,7 +2089,9 @@ static void FS_AddDirToRawPath (const char *rawdir, qboolean create, qboolean re
} }
void FS_BuildRawPath(void) { static void
FS_BuildRawPath(void)
{
// Add $HOME/.yq2, MUST be the last dir! Required, // Add $HOME/.yq2, MUST be the last dir! Required,
// otherwise the config cannot be written. // otherwise the config cannot be written.
if (!is_portable) { if (!is_portable) {