src/archiver_qpak.c
changeset 1261 cd5a31f4602a
parent 1259 b01150541cfd
child 1270 f8d3f58561b1
--- a/src/archiver_qpak.c	Fri Mar 23 02:43:22 2012 -0400
+++ b/src/archiver_qpak.c	Fri Mar 23 02:45:38 2012 -0400
@@ -34,206 +34,36 @@
 
 #if PHYSFS_SUPPORTS_QPAK
 
-/* !!! FIXME: what is this here for? */
-#if 1  /* Make this case insensitive? */
-#define QPAK_strcmp(x, y) __PHYSFS_stricmpASCII(x, y)
-#define QPAK_strncmp(x, y, z) __PHYSFS_strnicmpASCII(x, y, z)
-#else
-#define QPAK_strcmp(x, y) strcmp(x, y)
-#define QPAK_strncmp(x, y, z) strncmp(x, y, z)
-#endif
-
-
-typedef struct
-{
-    char name[56];
-    PHYSFS_uint32 startPos;
-    PHYSFS_uint32 size;
-} QPAKentry;
-
-typedef struct
-{
-    PHYSFS_Io *io;
-    PHYSFS_uint32 entryCount;
-    QPAKentry *entries;
-} QPAKinfo;
-
-typedef struct
-{
-    PHYSFS_Io *io;
-    QPAKentry *entry;
-    PHYSFS_uint32 curPos;
-} QPAKfileinfo;
-
-/* Magic numbers... */
-#define QPAK_SIG 0x4b434150   /* "PACK" in ASCII. */
-
-
-static void QPAK_dirClose(dvoid *opaque)
-{
-    QPAKinfo *info = ((QPAKinfo *) opaque);
-    info->io->destroy(info->io);
-    allocator.Free(info->entries);
-    allocator.Free(info);
-} /* QPAK_dirClose */
-
+#define QPAK_SIG 0x4B434150   /* "PACK" in ASCII. */
 
-static PHYSFS_sint64 QPAK_read(PHYSFS_Io *io, void *buffer, PHYSFS_uint64 len)
-{
-    QPAKfileinfo *finfo = (QPAKfileinfo *) io->opaque;
-    const QPAKentry *entry = finfo->entry;
-    const PHYSFS_uint64 bytesLeft = (PHYSFS_uint64)(entry->size-finfo->curPos);
-    PHYSFS_sint64 rc;
-
-    if (bytesLeft < len)
-        len = bytesLeft;
-
-    rc = finfo->io->read(finfo->io, buffer, len);
-    if (rc > 0)
-        finfo->curPos += (PHYSFS_uint32) rc;
-
-    return rc;
-} /* QPAK_read */
-
-
-static PHYSFS_sint64 QPAK_write(PHYSFS_Io *io, const void *b, PHYSFS_uint64 len)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, -1);
-} /* QPAK_write */
-
-
-static PHYSFS_sint64 QPAK_tell(PHYSFS_Io *io)
-{
-    return ((QPAKfileinfo *) io->opaque)->curPos;
-} /* QPAK_tell */
-
-
-static int QPAK_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
-{
-    QPAKfileinfo *finfo = (QPAKfileinfo *) io->opaque;
-    const QPAKentry *entry = finfo->entry;
-    int rc;
-
-    BAIL_IF_MACRO(offset >= entry->size, PHYSFS_ERR_PAST_EOF, 0);
-    rc = finfo->io->seek(finfo->io, entry->startPos + offset);
-    if (rc)
-        finfo->curPos = (PHYSFS_uint32) offset;
-
-    return rc;
-} /* QPAK_seek */
-
-
-static PHYSFS_sint64 QPAK_length(PHYSFS_Io *io)
+static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
 {
-    const QPAKfileinfo *finfo = (QPAKfileinfo *) io->opaque;
-    return ((PHYSFS_sint64) finfo->entry->size);
-} /* QPAK_length */
-
-
-static PHYSFS_Io *QPAK_duplicate(PHYSFS_Io *_io)
-{
-    QPAKfileinfo *origfinfo = (QPAKfileinfo *) _io->opaque;
-    PHYSFS_Io *io = NULL;
-    PHYSFS_Io *retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
-    QPAKfileinfo *finfo = (QPAKfileinfo *) allocator.Malloc(sizeof (QPAKfileinfo));
-    GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, QPAK_duplicate_failed);
-    GOTO_IF_MACRO(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, QPAK_duplicate_failed);
+    UNPKentry *entries = NULL;
+    UNPKentry *entry = NULL;
 
-    io = origfinfo->io->duplicate(origfinfo->io);
-    GOTO_IF_MACRO(!io, ERRPASS, QPAK_duplicate_failed);
-    finfo->io = io;
-    finfo->entry = origfinfo->entry;
-    finfo->curPos = 0;
-    memcpy(retval, _io, sizeof (PHYSFS_Io));
-    retval->opaque = finfo;
-    return retval;
-
-QPAK_duplicate_failed:
-    if (finfo != NULL) allocator.Free(finfo);
-    if (retval != NULL) allocator.Free(retval);
-    if (io != NULL) io->destroy(io);
-    return NULL;
-} /* QPAK_duplicate */
-
-static int QPAK_flush(PHYSFS_Io *io) { return 1;  /* no write support. */ }
-
-
-static void QPAK_destroy(PHYSFS_Io *io)
-{
-    QPAKfileinfo *finfo = (QPAKfileinfo *) io->opaque;
-    finfo->io->destroy(finfo->io);
-    allocator.Free(finfo);
-    allocator.Free(io);
-} /* QPAK_destroy */
-
+    entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
+    BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
 
-static const PHYSFS_Io QPAK_Io =
-{
-    QPAK_read,
-    QPAK_write,
-    QPAK_seek,
-    QPAK_tell,
-    QPAK_length,
-    QPAK_duplicate,
-    QPAK_flush,
-    QPAK_destroy,
-    NULL
-};
-
-
-
-static int qpakEntryCmp(void *_a, PHYSFS_uint32 one, PHYSFS_uint32 two)
-{
-    if (one != two)
+    for (entry = entries; fileCount > 0; fileCount--, entry++)
     {
-        const QPAKentry *a = (const QPAKentry *) _a;
-        return QPAK_strcmp(a[one].name, a[two].name);
-    } /* if */
-
-    return 0;
-} /* qpakEntryCmp */
-
-
-static void qpakEntrySwap(void *_a, PHYSFS_uint32 one, PHYSFS_uint32 two)
-{
-    if (one != two)
-    {
-        QPAKentry tmp;
-        QPAKentry *first = &(((QPAKentry *) _a)[one]);
-        QPAKentry *second = &(((QPAKentry *) _a)[two]);
-        memcpy(&tmp, first, sizeof (QPAKentry));
-        memcpy(first, second, sizeof (QPAKentry));
-        memcpy(second, &tmp, sizeof (QPAKentry));
-    } /* if */
-} /* qpakEntrySwap */
-
-
-static int qpak_load_entries(QPAKinfo *info)
-{
-    PHYSFS_Io *io = info->io;
-    PHYSFS_uint32 fileCount = info->entryCount;
-    QPAKentry *entry;
-
-    info->entries = (QPAKentry*) allocator.Malloc(sizeof(QPAKentry)*fileCount);
-    BAIL_IF_MACRO(info->entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, 0);
-
-    for (entry = info->entries; fileCount > 0; fileCount--, entry++)
-    {
-        BAIL_IF_MACRO(!__PHYSFS_readAll(io, &entry->name, 56), ERRPASS, 0);
-        BAIL_IF_MACRO(!__PHYSFS_readAll(io, &entry->startPos, 4), ERRPASS, 0);
-        BAIL_IF_MACRO(!__PHYSFS_readAll(io, &entry->size, 4), ERRPASS, 0);
+        if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed;
+        if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
+        if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
         entry->size = PHYSFS_swapULE32(entry->size);
         entry->startPos = PHYSFS_swapULE32(entry->startPos);
     } /* for */
 
-    __PHYSFS_sort(info->entries, info->entryCount, qpakEntryCmp, qpakEntrySwap);
-    return 1;
-} /* qpak_load_entries */
+    return entries;
+
+failed:
+    allocator.Free(entries);
+    return NULL;
+} /* qpakLoadEntries */
 
 
 static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
 {
-    QPAKinfo *info = NULL;
+    UNPKentry *entries = NULL;
     PHYSFS_uint32 val = 0;
     PHYSFS_uint32 pos = 0;
     PHYSFS_uint32 count = 0;
@@ -258,295 +88,12 @@
 
     BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, NULL);
 
-    info = (QPAKinfo *) allocator.Malloc(sizeof (QPAKinfo));
-    BAIL_IF_MACRO(info == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    memset(info, '\0', sizeof (QPAKinfo));
-    info->io = io;
-    info->entryCount = count;
-
-    if (!qpak_load_entries(info))
-    {
-        if (info->entries != NULL)
-            allocator.Free(info->entries);
-        allocator.Free(info);
-        return NULL;
-    } /* if */
-
-    return info;
+    entries = qpakLoadEntries(io, count);
+    BAIL_IF_MACRO(!entries, ERRPASS, NULL);
+    return UNPK_openArchive(io, entries, count);
 } /* QPAK_openArchive */
 
 
-static PHYSFS_sint32 qpak_find_start_of_dir(QPAKinfo *info, const char *path,
-                                            int stop_on_first_find)
-{
-    PHYSFS_sint32 lo = 0;
-    PHYSFS_sint32 hi = (PHYSFS_sint32) (info->entryCount - 1);
-    PHYSFS_sint32 middle;
-    PHYSFS_uint32 dlen = (PHYSFS_uint32) strlen(path);
-    PHYSFS_sint32 retval = -1;
-    const char *name;
-    int rc;
-
-    if (*path == '\0')  /* root dir? */
-        return 0;
-
-    if ((dlen > 0) && (path[dlen - 1] == '/')) /* ignore trailing slash. */
-        dlen--;
-
-    while (lo <= hi)
-    {
-        middle = lo + ((hi - lo) / 2);
-        name = info->entries[middle].name;
-        rc = QPAK_strncmp(path, name, dlen);
-        if (rc == 0)
-        {
-            char ch = name[dlen];
-            if (ch < '/') /* make sure this isn't just a substr match. */
-                rc = -1;
-            else if (ch > '/')
-                rc = 1;
-            else 
-            {
-                if (stop_on_first_find) /* Just checking dir's existance? */
-                    return middle;
-
-                if (name[dlen + 1] == '\0') /* Skip initial dir entry. */
-                    return (middle + 1);
-
-                /* there might be more entries earlier in the list. */
-                retval = middle;
-                hi = middle - 1;
-            } /* else */
-        } /* if */
-
-        if (rc > 0)
-            lo = middle + 1;
-        else
-            hi = middle - 1;
-    } /* while */
-
-    return retval;
-} /* qpak_find_start_of_dir */
-
-
-/*
- * Moved to seperate function so we can use alloca then immediately throw
- *  away the allocated stack space...
- */
-static void doEnumCallback(PHYSFS_EnumFilesCallback cb, void *callbackdata,
-                           const char *odir, const char *str, PHYSFS_sint32 ln)
-{
-    char *newstr = __PHYSFS_smallAlloc(ln + 1);
-    if (newstr == NULL)
-        return;
-
-    memcpy(newstr, str, ln);
-    newstr[ln] = '\0';
-    cb(callbackdata, odir, newstr);
-    __PHYSFS_smallFree(newstr);
-} /* doEnumCallback */
-
-
-static void QPAK_enumerateFiles(dvoid *opaque, const char *dname,
-                                int omitSymLinks, PHYSFS_EnumFilesCallback cb,
-                                const char *origdir, void *callbackdata)
-{
-    QPAKinfo *info = ((QPAKinfo *) opaque);
-    PHYSFS_sint32 dlen, dlen_inc, max, i;
-
-    i = qpak_find_start_of_dir(info, dname, 0);
-    if (i == -1)  /* no such directory. */
-        return;
-
-    dlen = (PHYSFS_sint32) strlen(dname);
-    if ((dlen > 0) && (dname[dlen - 1] == '/')) /* ignore trailing slash. */
-        dlen--;
-
-    dlen_inc = ((dlen > 0) ? 1 : 0) + dlen;
-    max = (PHYSFS_sint32) info->entryCount;
-    while (i < max)
-    {
-        char *add;
-        char *ptr;
-        PHYSFS_sint32 ln;
-        char *e = info->entries[i].name;
-        if ((dlen) && ((QPAK_strncmp(e, dname, dlen)) || (e[dlen] != '/')))
-            break;  /* past end of this dir; we're done. */
-
-        add = e + dlen_inc;
-        ptr = strchr(add, '/');
-        ln = (PHYSFS_sint32) ((ptr) ? ptr-add : strlen(add));
-        doEnumCallback(cb, callbackdata, origdir, add, ln);
-        ln += dlen_inc;  /* point past entry to children... */
-
-        /* increment counter and skip children of subdirs... */
-        while ((++i < max) && (ptr != NULL))
-        {
-            char *e_new = info->entries[i].name;
-            if ((QPAK_strncmp(e, e_new, ln) != 0) || (e_new[ln] != '/'))
-                break;
-        } /* while */
-    } /* while */
-} /* QPAK_enumerateFiles */
-
-
-/*
- * This will find the QPAKentry associated with a path in platform-independent
- *  notation. Directories don't have QPAKentries associated with them, but 
- *  (*isDir) will be set to non-zero if a dir was hit.
- */
-static QPAKentry *qpak_find_entry(const QPAKinfo *info, const char *path,
-                                  int *isDir)
-{
-    QPAKentry *a = info->entries;
-    PHYSFS_sint32 pathlen = (PHYSFS_sint32) strlen(path);
-    PHYSFS_sint32 lo = 0;
-    PHYSFS_sint32 hi = (PHYSFS_sint32) (info->entryCount - 1);
-    PHYSFS_sint32 middle;
-    const char *thispath = NULL;
-    int rc;
-
-    while (lo <= hi)
-    {
-        middle = lo + ((hi - lo) / 2);
-        thispath = a[middle].name;
-        rc = QPAK_strncmp(path, thispath, pathlen);
-
-        if (rc > 0)
-            lo = middle + 1;
-
-        else if (rc < 0)
-            hi = middle - 1;
-
-        else /* substring match...might be dir or entry or nothing. */
-        {
-            if (isDir != NULL)
-            {
-                *isDir = (thispath[pathlen] == '/');
-                if (*isDir)
-                    return NULL;
-            } /* if */
-
-            if (thispath[pathlen] == '\0') /* found entry? */
-                return &a[middle];
-            /* adjust search params, try again. */
-            else if (thispath[pathlen] > '/')
-                hi = middle - 1;
-            else
-                lo = middle + 1;
-        } /* if */
-    } /* while */
-
-    if (isDir != NULL)
-        *isDir = 0;
-
-    BAIL_MACRO(PHYSFS_ERR_NO_SUCH_PATH, NULL);
-} /* qpak_find_entry */
-
-
-static PHYSFS_Io *QPAK_openRead(dvoid *opaque, const char *fnm, int *fileExists)
-{
-    PHYSFS_Io *io = NULL;
-    QPAKinfo *info = ((QPAKinfo *) opaque);
-    QPAKfileinfo *finfo;
-    QPAKentry *entry;
-    int isDir;
-
-    entry = qpak_find_entry(info, fnm, &isDir);
-    *fileExists = ((entry != NULL) || (isDir));
-    BAIL_IF_MACRO(isDir, PHYSFS_ERR_NOT_A_FILE, NULL);
-    BAIL_IF_MACRO(entry == NULL, PHYSFS_ERR_NO_SUCH_PATH, NULL);
-
-    finfo = (QPAKfileinfo *) allocator.Malloc(sizeof (QPAKfileinfo));
-    BAIL_IF_MACRO(finfo == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-
-    finfo->io = info->io->duplicate(info->io);
-    GOTO_IF_MACRO(finfo->io == NULL, ERRPASS, QPAK_openRead_failed);
-    if (!finfo->io->seek(finfo->io, entry->startPos))
-        goto QPAK_openRead_failed;
-
-    finfo->curPos = 0;
-    finfo->entry = entry;
-    io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
-    GOTO_IF_MACRO(io == NULL, PHYSFS_ERR_OUT_OF_MEMORY, QPAK_openRead_failed);
-    memcpy(io, &QPAK_Io, sizeof (PHYSFS_Io));
-    io->opaque = finfo;
-
-    return io;
-
-QPAK_openRead_failed:
-    if (finfo != NULL)
-    {
-        if (finfo->io != NULL)
-            finfo->io->destroy(finfo->io);
-        allocator.Free(finfo);
-    } /* if */
-
-    if (io != NULL)
-        allocator.Free(io);
-
-    return NULL;
-} /* QPAK_openRead */
-
-
-static PHYSFS_Io *QPAK_openWrite(dvoid *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* QPAK_openWrite */
-
-
-static PHYSFS_Io *QPAK_openAppend(dvoid *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* QPAK_openAppend */
-
-
-static int QPAK_remove(dvoid *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* QPAK_remove */
-
-
-static int QPAK_mkdir(dvoid *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* QPAK_mkdir */
-
-
-static int QPAK_stat(dvoid *opaque, const char *filename, int *exists,
-                     PHYSFS_Stat *stat)
-{
-    int isDir = 0;
-    const QPAKinfo *info = (const QPAKinfo *) opaque;
-    const QPAKentry *entry = qpak_find_entry(info, filename, &isDir);
-
-    if (isDir)
-    {
-        *exists = 1;
-        stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
-        stat->filesize = 0;
-    } /* if */
-    else if (entry != NULL)
-    {
-        *exists = 1;
-        stat->filetype = PHYSFS_FILETYPE_REGULAR;
-        stat->filesize = entry->size;
-    } /* else if */
-    else
-    {
-        *exists = 0;
-        return 0;
-    } /* else */
-
-    stat->modtime = -1;
-    stat->createtime = -1;
-    stat->accesstime = -1;
-    stat->readonly = 1;
-
-    return 1;
-} /* QPAK_stat */
-
-
 const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK =
 {
     "PAK",
@@ -555,19 +102,18 @@
     "http://icculus.org/physfs/",
 };
 
-
 const PHYSFS_Archiver __PHYSFS_Archiver_QPAK =
 {
     &__PHYSFS_ArchiveInfo_QPAK,
-    QPAK_openArchive,        /* openArchive() method    */
-    QPAK_enumerateFiles,     /* enumerateFiles() method */
-    QPAK_openRead,           /* openRead() method       */
-    QPAK_openWrite,          /* openWrite() method      */
-    QPAK_openAppend,         /* openAppend() method     */
-    QPAK_remove,             /* remove() method         */
-    QPAK_mkdir,              /* mkdir() method          */
-    QPAK_dirClose,           /* dirClose() method       */
-    QPAK_stat                /* stat() method           */
+    QPAK_openArchive,       /* openArchive() method    */
+    UNPK_enumerateFiles,    /* enumerateFiles() method */
+    UNPK_openRead,          /* openRead() method       */
+    UNPK_openWrite,         /* openWrite() method      */
+    UNPK_openAppend,        /* openAppend() method     */
+    UNPK_remove,            /* remove() method         */
+    UNPK_mkdir,             /* mkdir() method          */
+    UNPK_dirClose,          /* dirClose() method       */
+    UNPK_stat               /* stat() method           */
 };
 
 #endif  /* defined PHYSFS_SUPPORTS_QPAK */