--- a/misc/physfs/src/archiver_unpacked.c Wed Feb 20 02:21:58 2013 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,470 +0,0 @@
-/*
- * 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 ... */
-