--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/archiver_unpacked.c Fri Feb 22 05:43:56 2013 +0100
@@ -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 ... */
+