diff -r d1ea9b3f543e -r 13e2037ebc79 misc/physfs/src/archiver_unpacked.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/physfs/src/archiver_unpacked.c	Sat Oct 20 00:20:39 2012 +0400
@@ -0,0 +1,470 @@
+/*
+ * High-level PhysicsFS archiver for simple unpacked file formats.
+ *
+ * This is a framework that basic archivers build on top of. It's for simple
+ *  formats that can just hand back a list of files and the offsets of their
+ *  uncompressed data. There are an alarming number of formats like this.
+ *
+ * RULES: Archive entries must be uncompressed, must not have separate subdir
+ *  entries (but can have subdirs), must be case insensitive LOW ASCII
+ *  filenames <= 56 bytes. No symlinks, etc. We can relax some of these rules
+ *  as necessary.
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ *  This file written by Ryan C. Gordon.
+ */
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+typedef struct
+{
+    PHYSFS_Io *io;
+    PHYSFS_uint32 entryCount;
+    UNPKentry *entries;
+} UNPKinfo;
+
+
+typedef struct
+{
+    PHYSFS_Io *io;
+    UNPKentry *entry;
+    PHYSFS_uint32 curPos;
+} UNPKfileinfo;
+
+
+void UNPK_closeArchive(PHYSFS_Dir *opaque)
+{
+    UNPKinfo *info = ((UNPKinfo *) opaque);
+    info->io->destroy(info->io);
+    allocator.Free(info->entries);
+    allocator.Free(info);
+} /* UNPK_closeArchive */
+
+
+static PHYSFS_sint64 UNPK_read(PHYSFS_Io *io, void *buffer, PHYSFS_uint64 len)
+{
+    UNPKfileinfo *finfo = (UNPKfileinfo *) io->opaque;
+    const UNPKentry *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;
+} /* UNPK_read */
+
+
+static PHYSFS_sint64 UNPK_write(PHYSFS_Io *io, const void *b, PHYSFS_uint64 len)
+{
+    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, -1);
+} /* UNPK_write */
+
+
+static PHYSFS_sint64 UNPK_tell(PHYSFS_Io *io)
+{
+    return ((UNPKfileinfo *) io->opaque)->curPos;
+} /* UNPK_tell */
+
+
+static int UNPK_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
+{
+    UNPKfileinfo *finfo = (UNPKfileinfo *) io->opaque;
+    const UNPKentry *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;
+} /* UNPK_seek */
+
+
+static PHYSFS_sint64 UNPK_length(PHYSFS_Io *io)
+{
+    const UNPKfileinfo *finfo = (UNPKfileinfo *) io->opaque;
+    return ((PHYSFS_sint64) finfo->entry->size);
+} /* UNPK_length */
+
+
+static PHYSFS_Io *UNPK_duplicate(PHYSFS_Io *_io)
+{
+    UNPKfileinfo *origfinfo = (UNPKfileinfo *) _io->opaque;
+    PHYSFS_Io *io = NULL;
+    PHYSFS_Io *retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
+    UNPKfileinfo *finfo = (UNPKfileinfo *) allocator.Malloc(sizeof (UNPKfileinfo));
+    GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_duplicate_failed);
+    GOTO_IF_MACRO(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_duplicate_failed);
+
+    io = origfinfo->io->duplicate(origfinfo->io);
+    if (!io) goto UNPK_duplicate_failed;
+    finfo->io = io;
+    finfo->entry = origfinfo->entry;
+    finfo->curPos = 0;
+    memcpy(retval, _io, sizeof (PHYSFS_Io));
+    retval->opaque = finfo;
+    return retval;
+
+UNPK_duplicate_failed:
+    if (finfo != NULL) allocator.Free(finfo);
+    if (retval != NULL) allocator.Free(retval);
+    if (io != NULL) io->destroy(io);
+    return NULL;
+} /* UNPK_duplicate */
+
+static int UNPK_flush(PHYSFS_Io *io) { return 1;  /* no write support. */ }
+
+static void UNPK_destroy(PHYSFS_Io *io)
+{
+    UNPKfileinfo *finfo = (UNPKfileinfo *) io->opaque;
+    finfo->io->destroy(finfo->io);
+    allocator.Free(finfo);
+    allocator.Free(io);
+} /* UNPK_destroy */
+
+
+static const PHYSFS_Io UNPK_Io =
+{
+    CURRENT_PHYSFS_IO_API_VERSION, NULL,
+    UNPK_read,
+    UNPK_write,
+    UNPK_seek,
+    UNPK_tell,
+    UNPK_length,
+    UNPK_duplicate,
+    UNPK_flush,
+    UNPK_destroy
+};
+
+
+static int entryCmp(void *_a, size_t one, size_t two)
+{
+    if (one != two)
+    {
+        const UNPKentry *a = (const UNPKentry *) _a;
+        return __PHYSFS_stricmpASCII(a[one].name, a[two].name);
+    } /* if */
+
+    return 0;
+} /* entryCmp */
+
+
+static void entrySwap(void *_a, size_t one, size_t two)
+{
+    if (one != two)
+    {
+        UNPKentry tmp;
+        UNPKentry *first = &(((UNPKentry *) _a)[one]);
+        UNPKentry *second = &(((UNPKentry *) _a)[two]);
+        memcpy(&tmp, first, sizeof (UNPKentry));
+        memcpy(first, second, sizeof (UNPKentry));
+        memcpy(second, &tmp, sizeof (UNPKentry));
+    } /* if */
+} /* entrySwap */
+
+
+static PHYSFS_sint32 findStartOfDir(UNPKinfo *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 = __PHYSFS_strnicmpASCII(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;
+} /* findStartOfDir */
+
+
+/*
+ * 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 */
+
+
+void UNPK_enumerateFiles(PHYSFS_Dir *opaque, const char *dname,
+                         int omitSymLinks, PHYSFS_EnumFilesCallback cb,
+                         const char *origdir, void *callbackdata)
+{
+    UNPKinfo *info = ((UNPKinfo *) opaque);
+    PHYSFS_sint32 dlen, dlen_inc, max, i;
+
+    i = findStartOfDir(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) &&
+            ((__PHYSFS_strnicmpASCII(e, dname, dlen)) || (e[dlen] != '/')))
+        {
+            break;  /* past end of this dir; we're done. */
+        } /* if */
+
+        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 ((__PHYSFS_strnicmpASCII(e, e_new, ln) != 0) ||
+                (e_new[ln] != '/'))
+            {
+                break;
+            } /* if */
+        } /* while */
+    } /* while */
+} /* UNPK_enumerateFiles */
+
+
+/*
+ * This will find the UNPKentry associated with a path in platform-independent
+ *  notation. Directories don't have UNPKentries associated with them, but 
+ *  (*isDir) will be set to non-zero if a dir was hit.
+ */
+static UNPKentry *findEntry(const UNPKinfo *info, const char *path, int *isDir)
+{
+    UNPKentry *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 = __PHYSFS_strnicmpASCII(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);
+} /* findEntry */
+
+
+PHYSFS_Io *UNPK_openRead(PHYSFS_Dir *opaque, const char *fnm, int *fileExists)
+{
+    PHYSFS_Io *retval = NULL;
+    UNPKinfo *info = (UNPKinfo *) opaque;
+    UNPKfileinfo *finfo = NULL;
+    int isdir = 0;
+    UNPKentry *entry = findEntry(info, fnm, &isdir);
+
+    *fileExists = (entry != NULL);
+    GOTO_IF_MACRO(isdir, PHYSFS_ERR_NOT_A_FILE, UNPK_openRead_failed);
+    GOTO_IF_MACRO(!entry, ERRPASS, UNPK_openRead_failed);
+
+    retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
+    GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_openRead_failed);
+
+    finfo = (UNPKfileinfo *) allocator.Malloc(sizeof (UNPKfileinfo));
+    GOTO_IF_MACRO(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_openRead_failed);
+
+    finfo->io = info->io->duplicate(info->io);
+    GOTO_IF_MACRO(!finfo->io, ERRPASS, UNPK_openRead_failed);
+
+    if (!finfo->io->seek(finfo->io, entry->startPos))
+        goto UNPK_openRead_failed;
+
+    finfo->curPos = 0;
+    finfo->entry = entry;
+
+    memcpy(retval, &UNPK_Io, sizeof (*retval));
+    retval->opaque = finfo;
+    return retval;
+
+UNPK_openRead_failed:
+    if (finfo != NULL)
+    {
+        if (finfo->io != NULL)
+            finfo->io->destroy(finfo->io);
+        allocator.Free(finfo);
+    } /* if */
+
+    if (retval != NULL)
+        allocator.Free(retval);
+
+    return NULL;
+} /* UNPK_openRead */
+
+
+PHYSFS_Io *UNPK_openWrite(PHYSFS_Dir *opaque, const char *name)
+{
+    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
+} /* UNPK_openWrite */
+
+
+PHYSFS_Io *UNPK_openAppend(PHYSFS_Dir *opaque, const char *name)
+{
+    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
+} /* UNPK_openAppend */
+
+
+int UNPK_remove(PHYSFS_Dir *opaque, const char *name)
+{
+    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
+} /* UNPK_remove */
+
+
+int UNPK_mkdir(PHYSFS_Dir *opaque, const char *name)
+{
+    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
+} /* UNPK_mkdir */
+
+
+int UNPK_stat(PHYSFS_Dir *opaque, const char *filename,
+              int *exists, PHYSFS_Stat *stat)
+{
+    int isDir = 0;
+    const UNPKinfo *info = (const UNPKinfo *) opaque;
+    const UNPKentry *entry = findEntry(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;
+} /* UNPK_stat */
+
+
+PHYSFS_Dir *UNPK_openArchive(PHYSFS_Io *io, UNPKentry *e,
+                             const PHYSFS_uint32 num)
+{
+    UNPKinfo *info = (UNPKinfo *) allocator.Malloc(sizeof (UNPKinfo));
+    if (info == NULL)
+    {
+        allocator.Free(e);
+        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+    } /* if */
+
+    __PHYSFS_sort(e, (size_t) num, entryCmp, entrySwap);
+    info->io = io;
+    info->entryCount = num;
+    info->entries = e;
+
+    return info;
+} /* UNPK_openArchive */
+
+/* end of archiver_unpacked.c ... */
+