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Switch to xxHash for hashing lump data

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And shrink lumpinfo_t to a nice, round 32 bytes. We don't support 64-bit
file sizes anyway
This commit is contained in:
GenericHeroGuy 2025-06-25 02:09:28 +02:00
parent 4ffd4621e4
commit 4a3ae30984
2 changed files with 29 additions and 25 deletions
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4
src/r_picformats.c
View file

@ -1860,8 +1860,8 @@ void R_LoadSpriteInfoLumps(UINT16 wadnum)
{ "SPR_", 4 },
};
UINT16 i = W_CheckNumForNameMultiPrefixPwad(&sprtinfoprfx, NUMPREFIXES, wadnum, 0);
for (; i != INT16_MAX; i = W_CheckNumForNameMultiPrefixPwad(&sprtinfoprfx, NUMPREFIXES, wadnum, i + 1))
UINT16 i = W_CheckNumForNameMultiPrefixPwad(sprtinfoprfx, NUMPREFIXES, wadnum, 0);
for (; i != INT16_MAX; i = W_CheckNumForNameMultiPrefixPwad(sprtinfoprfx, NUMPREFIXES, wadnum, i + 1))
{
R_ParseSPRTINFOLump(wadnum, i);
}

50
src/w_wad.c
View file

@ -158,13 +158,13 @@ typedef struct zlentry_s
// a memory entry of the wad directory
struct lumpinfo_t
{
unsigned long position; // filelump_t filepos
unsigned long disksize; // filelump_t size
size_t size; // real (uncompressed) size
UINT32 hash;
UINT32 longname; // e.g. "LongEntryName"
UINT32 fullname; // e.g. "Folder/Subfolder/LongEntryName.extension"
UINT32 hash; // hash for longname in ALL CAPS
UINT32 longname; // e.g. "LongEntryName"
UINT32 fullname; // e.g. "Folder/Subfolder/LongEntryName.extension"
UINT32 position; // filelump_t filepos
UINT32 disksize; // filelump_t size
compmethod compression; // lump compression method
size_t size; // real (uncompressed) size
};
typedef struct
@ -180,7 +180,7 @@ typedef struct
typedef struct lumpnum_cache_s
{
char lumpname[32];
UINT32 lumphash;
UINT32 lumphash; // hash for lumpname WITHOUT all caps
lumpnum_t lumpnum;
} lumpnum_cache_t;
@ -518,7 +518,10 @@ static lumpinfo_t* ResGetLumpsStandalone (FILE* handle, UINT16* numlumps, const
fseek(handle, 0, SEEK_SET);
lumpinfo->longname = lumpinfo->fullname = strbuf_append(&lumpnamebuf, lumpname);
lumpinfo->hash = quickncasehash(lumpname, 8);
char *name = strdup(lumpname);
strupr(name);
lumpinfo->hash = HASH32(lumpname, strlen(name));
free(name);
*numlumps = 1;
return lumpinfo;
@ -657,7 +660,8 @@ static lumpinfo_t* ResGetLumpsWad (FILE* handle, UINT16* nlmp, const char* filen
CONS_Debug(DBG_SETUP, "WADNAME handling:\n -- path %s\n -- interpreted lumpname %s\n", filename, name);
// Grab the hash from the first part
lump_p->hash = quickncasehash(name, 8);
strupr(name);
lump_p->hash = HASH32(name, strlen(name));
free(name);
wadnamelump = i | (numwadfiles << 16);
@ -671,7 +675,8 @@ static lumpinfo_t* ResGetLumpsWad (FILE* handle, UINT16* nlmp, const char* filen
lump_p->longname = lump_p->fullname = strbuf_append(&lumpnamebuf, name);
// Set up true hash
lump_p->hash = quickncasehash(name, 8);
strupr(name);
lump_p->hash = HASH32(name, strlen(name));
}
}
free(fileinfov);
@ -781,15 +786,11 @@ static lumpinfo_t* ResGetLumpsZip (FILE* handle, UINT16* nlmp)
if ((dotpos = strrchr(trimname, '.')) == 0)
dotpos = fullname + strlen(fullname); // Watch for files without extension.
char backup = trimname[dotpos - trimname];
lump_p->fullname = strbuf_append(&lumpnamebuf, fullname);
trimname[dotpos - trimname] = '\0';
lump_p->longname = strbuf_append(&lumpnamebuf, trimname);
char name[8];
strncpy(name, trimname, 8);
lump_p->hash = quickncasehash(name, 8);
trimname[dotpos - trimname] = backup;
lump_p->fullname = strbuf_append(&lumpnamebuf, fullname);
strupr(trimname);
lump_p->hash = HASH32(trimname, strlen(trimname));
switch(zentry.compression)
{
@ -1232,7 +1233,7 @@ UINT16 W_CheckNumForNamePwad(const char *name, UINT16 wad, UINT16 startlump)
strlcpy(uname, name, sizeof uname);
strupr(uname);
hash = quickncasehash(uname, 8);
hash = HASH32(uname, strlen(uname));
//
// scan forward
@ -1268,7 +1269,7 @@ UINT16 W_CheckNumForLongNamePwad(const char *name, UINT16 wad, UINT16 startlump)
strlcpy(uname, name, sizeof uname);
strupr(uname);
hash = quickncasehash(uname, 8); // Not a mistake, legacy system for short lumpnames
hash = HASH32(uname, strlen(uname));
//
// scan forward
@ -1400,7 +1401,7 @@ UINT16 W_CheckNumForFullNamePK3(const char *name, UINT16 wad, UINT16 startlump)
lumpnum_t W_CheckNumForName(const char *name)
{
INT32 i;
UINT32 hash = name ? quickncasehash(name, 8) : 0;
UINT32 hash = name ? HASH32(name, strlen(name)) : 0;
lumpnum_t check = INT16_MAX;
if (name == NULL)
@ -1452,7 +1453,7 @@ lumpnum_t W_CheckNumForName(const char *name)
lumpnum_t W_CheckNumForLongName(const char *name)
{
INT32 i;
UINT32 hash = name ? quickncasehash(name, 8) : 0;
UINT32 hash = name ? HASH32(name, strlen(name)) : 0;
lumpnum_t check = INT16_MAX;
if (name == NULL)
@ -1502,7 +1503,7 @@ lumpnum_t W_CheckNumForLongName(const char *name)
lumpnum_t W_CheckNumForMap(const char *name)
{
lumpnum_t check = INT16_MAX;
UINT32 uhash, hash = quickncasehash(name, LUMPNUMCACHENAME);
UINT32 uhash, hash = HASH32(name, min(strlen(name), LUMPNUMCACHENAME));
INT32 i;
// Check the lumpnumcache first. Loop backwards so that we check
@ -1517,7 +1518,10 @@ lumpnum_t W_CheckNumForMap(const char *name)
}
}
uhash = quickncasehash(name, 8); // Not a mistake, legacy system for short lumpnames
char *uname = strdup(name);
strupr(uname);
uhash = HASH32(name, strlen(uname));
free(uname);
for (i = numwadfiles - 1; i >= 0; i--)
{