--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/physfs/src/archiver_iso9660.c Sat Oct 20 00:20:39 2012 +0400
@@ -0,0 +1,969 @@
+/*
+ * ISO9660 support routines for PhysicsFS.
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ * This file written by Christoph Nelles.
+ */
+
+/* !!! FIXME: this file needs Ryanification. */
+
+/*
+ * Handles CD-ROM disk images (and raw CD-ROM devices).
+ *
+ * Not supported:
+ * - RockRidge
+ * - Non 2048 Sectors
+ * - UDF
+ *
+ * Deviations from the standard
+ * - Ignores mandatory sort order
+ * - Allows various invalid file names
+ *
+ * Problems
+ * - Ambiguities in the standard
+ */
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+#if PHYSFS_SUPPORTS_ISO9660
+
+#include <time.h>
+
+/* cache files smaller than this completely in memory */
+#define ISO9660_FULLCACHEMAXSIZE 2048
+
+/* !!! FIXME: this is going to cause trouble. */
+#pragma pack(push) /* push current alignment to stack */
+#pragma pack(1) /* set alignment to 1 byte boundary */
+
+/* This is the format as defined by the standard
+typedef struct
+{
+ PHYSFS_uint32 lsb;
+ PHYSFS_uint32 msb;
+} ISOBB32bit; // 32byte Both Byte type, means the value first in LSB then in MSB
+
+typedef struct
+{
+ PHYSFS_uint16 lsb;
+ PHYSFS_uint16 msb;
+} ISOBB16bit; // 16byte Both Byte type, means the value first in LSB then in MSB
+*/
+
+/* define better ones to simplify coding (less if's) */
+#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN
+#define ISOBB32bit(name) PHYSFS_uint32 name; PHYSFS_uint32 __dummy_##name;
+#define ISOBB16bit(name) PHYSFS_uint16 name; PHYSFS_uint16 __dummy_##name;
+#else
+#define ISOBB32bit(name) PHYSFS_uint32 __dummy_##name; PHYSFS_uint32 name;
+#define ISOBB16bit(name) PHYSFS_uint16 __dummy_##name; PHYSFS_uint16 name;
+#endif
+
+typedef struct
+{
+ char year[4];
+ char month[2];
+ char day[2];
+ char hour[2];
+ char minute[2];
+ char second[2];
+ char centisec[2];
+ PHYSFS_sint8 offset; /* in 15min from GMT */
+} ISO9660VolumeTimestamp;
+
+typedef struct
+{
+ PHYSFS_uint8 year;
+ PHYSFS_uint8 month;
+ PHYSFS_uint8 day;
+ PHYSFS_uint8 hour;
+ PHYSFS_uint8 minute;
+ PHYSFS_uint8 second;
+ PHYSFS_sint8 offset;
+} ISO9660FileTimestamp;
+
+typedef struct
+{
+ unsigned existence:1;
+ unsigned directory:1;
+ unsigned associated_file:1;
+ unsigned record:1;
+ unsigned protection:1;
+ unsigned reserved:2;
+ unsigned multiextent:1;
+} ISO9660FileFlags;
+
+typedef struct
+{
+ PHYSFS_uint8 length;
+ PHYSFS_uint8 attribute_length;
+ ISOBB32bit(extent_location)
+ ISOBB32bit(data_length)
+ ISO9660FileTimestamp timestamp;
+ ISO9660FileFlags file_flags;
+ PHYSFS_uint8 file_unit_size;
+ PHYSFS_uint8 gap_size;
+ ISOBB16bit(vol_seq_no)
+ PHYSFS_uint8 len_fi;
+ char unused;
+} ISO9660RootDirectoryRecord;
+
+/* this structure is combined for all Volume descriptor types */
+typedef struct
+{
+ PHYSFS_uint8 type;
+ char identifier[5];
+ PHYSFS_uint8 version;
+ PHYSFS_uint8 flags;
+ char system_identifier[32];
+ char volume_identifier[32];
+ char unused2[8];
+ ISOBB32bit(space_size)
+ PHYSFS_uint8 escape_sequences[32];
+ ISOBB16bit(vol_set_size)
+ ISOBB16bit(vol_seq_no)
+ ISOBB16bit(block_size)
+ ISOBB32bit(path_table_size)
+/* PHYSFS_uint32 path_table_start_lsb; // why didn't they use both byte type?
+ PHYSFS_uint32 opt_path_table_start_lsb;
+ PHYSFS_uint32 path_table_start_msb;
+ PHYSFS_uint32 opt_path_table_start_msb;*/
+#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN
+ PHYSFS_uint32 path_table_start;
+ PHYSFS_uint32 opt_path_table_start;
+ PHYSFS_uint32 unused6;
+ PHYSFS_uint32 unused7;
+#else
+ PHYSFS_uint32 unused6;
+ PHYSFS_uint32 unused7;
+ PHYSFS_uint32 path_table_start;
+ PHYSFS_uint32 opt_path_table_start;
+#endif
+ ISO9660RootDirectoryRecord rootdirectory;
+ char set_identifier[128];
+ char publisher_identifier[128];
+ char preparer_identifer[128];
+ char application_identifier[128];
+ char copyright_file_identifier[37];
+ char abstract_file_identifier[37];
+ char bibliographic_file_identifier[37];
+ ISO9660VolumeTimestamp creation_timestamp;
+ ISO9660VolumeTimestamp modification_timestamp;
+ ISO9660VolumeTimestamp expiration_timestamp;
+ ISO9660VolumeTimestamp effective_timestamp;
+ PHYSFS_uint8 file_structure_version;
+ char unused4;
+ char application_use[512];
+ char unused5[653];
+} ISO9660VolumeDescriptor;
+
+typedef struct
+{
+ PHYSFS_uint8 recordlen;
+ PHYSFS_uint8 extattributelen;
+ ISOBB32bit(extentpos)
+ ISOBB32bit(datalen)
+ ISO9660FileTimestamp recordtime;
+ ISO9660FileFlags flags;
+ PHYSFS_uint8 file_unit_size;
+ PHYSFS_uint8 interleave_gap;
+ ISOBB16bit(volseqno)
+ PHYSFS_uint8 filenamelen;
+ char filename[222]; /* This is not exact, but makes reading easier */
+} ISO9660FileDescriptor;
+
+typedef struct
+{
+ ISOBB16bit(owner)
+ ISOBB16bit(group)
+ PHYSFS_uint16 flags; /* not implemented*/
+ ISO9660VolumeTimestamp create_time; /* yes, not file timestamp */
+ ISO9660VolumeTimestamp mod_time;
+ ISO9660VolumeTimestamp expire_time;
+ ISO9660VolumeTimestamp effective_time;
+ PHYSFS_uint8 record_format;
+ PHYSFS_uint8 record_attributes;
+ ISOBB16bit(record_len)
+ char system_identifier[32];
+ char system_use[64];
+ PHYSFS_uint8 version;
+ ISOBB16bit(escape_len)
+ char reserved[64];
+ /** further fields not implemented */
+} ISO9660ExtAttributeRec;
+
+#pragma pack(pop) /* restore original alignment from stack */
+
+typedef struct
+{
+ PHYSFS_Io *io;
+ PHYSFS_uint32 rootdirstart;
+ PHYSFS_uint32 rootdirsize;
+ PHYSFS_uint64 currpos;
+ int isjoliet;
+ char *path;
+ void *mutex;
+} ISO9660Handle;
+
+
+typedef struct __ISO9660FileHandle
+{
+ PHYSFS_sint64 filesize;
+ PHYSFS_uint64 currpos;
+ PHYSFS_uint64 startblock;
+ ISO9660Handle *isohandle;
+ PHYSFS_uint32 (*read) (struct __ISO9660FileHandle *filehandle, void *buffer,
+ PHYSFS_uint64 len);
+ int (*seek)(struct __ISO9660FileHandle *filehandle, PHYSFS_sint64 offset);
+ void (*close)(struct __ISO9660FileHandle *filehandle);
+ /* !!! FIXME: anonymouse union is going to cause problems. */
+ union
+ {
+ /* !!! FIXME: just use a memory PHYSFS_Io here, unify all this code. */
+ char *cacheddata; /* data of file when cached */
+ PHYSFS_Io *io; /* handle to separate opened file */
+ };
+} ISO9660FileHandle;
+
+/*******************************************************************************
+ * Time conversion functions
+ ******************************************************************************/
+
+static PHYSFS_sint64 iso_mktime(ISO9660FileTimestamp *timestamp)
+{
+ struct tm tm;
+ tm.tm_year = timestamp->year;
+ tm.tm_mon = timestamp->month - 1;
+ tm.tm_mday = timestamp->day;
+ tm.tm_hour = timestamp->hour;
+ tm.tm_min = timestamp->minute;
+ tm.tm_sec = timestamp->second;
+ /* Ignore GMT offset for now... */
+ return mktime(&tm);
+} /* iso_mktime */
+
+static int iso_atoi2(char *text)
+{
+ return ((text[0] - 40) * 10) + (text[1] - 40);
+} /* iso_atoi2 */
+
+static int iso_atoi4(char *text)
+{
+ return ((text[0] - 40) * 1000) + ((text[1] - 40) * 100) +
+ ((text[2] - 40) * 10) + (text[3] - 40);
+} /* iso_atoi4 */
+
+static PHYSFS_sint64 iso_volume_mktime(ISO9660VolumeTimestamp *timestamp)
+{
+ struct tm tm;
+ tm.tm_year = iso_atoi4(timestamp->year);
+ tm.tm_mon = iso_atoi2(timestamp->month) - 1;
+ tm.tm_mday = iso_atoi2(timestamp->day);
+ tm.tm_hour = iso_atoi2(timestamp->hour);
+ tm.tm_min = iso_atoi2(timestamp->minute);
+ tm.tm_sec = iso_atoi2(timestamp->second);
+ /* this allows values outside the range of a unix timestamp... sanitize them */
+ PHYSFS_sint64 value = mktime(&tm);
+ return value == -1 ? 0 : value;
+} /* iso_volume_mktime */
+
+/*******************************************************************************
+ * Filename extraction
+ ******************************************************************************/
+
+static int iso_extractfilenameISO(ISO9660FileDescriptor *descriptor,
+ char *filename, int *version)
+{
+ *filename = '\0';
+ if (descriptor->flags.directory)
+ {
+ strncpy(filename, descriptor->filename, descriptor->filenamelen);
+ filename[descriptor->filenamelen] = '\0';
+ *version = 0;
+ } /* if */
+ else
+ {
+ /* find last SEPARATOR2 */
+ int pos = 0;
+ int lastfound = -1;
+ for(;pos < descriptor->filenamelen; pos++)
+ if (descriptor->filename[pos] == ';')
+ lastfound = pos;
+ BAIL_IF_MACRO(lastfound < 1, PHYSFS_ERR_NO_SUCH_PATH /* !!! FIXME: PHYSFS_ERR_BAD_FILENAME */, -1);
+ BAIL_IF_MACRO(lastfound == (descriptor->filenamelen -1), PHYSFS_ERR_NO_SUCH_PATH /* !!! PHYSFS_ERR_BAD_FILENAME */, -1);
+ strncpy(filename, descriptor->filename, lastfound);
+ if (filename[lastfound - 1] == '.')
+ filename[lastfound - 1] = '\0'; /* consume trailing ., as done in all implementations */
+ else
+ filename[lastfound] = '\0';
+ *version = atoi(descriptor->filename + lastfound);
+ } /* else */
+
+ return 0;
+} /* iso_extractfilenameISO */
+
+
+static int iso_extractfilenameUCS2(ISO9660FileDescriptor *descriptor,
+ char *filename, int *version)
+{
+ PHYSFS_uint16 tmp[128];
+ PHYSFS_uint16 *src;
+ int len;
+
+ *filename = '\0';
+ *version = 1; /* Joliet does not have versions.. at least not on my images */
+
+ src = (PHYSFS_uint16*) descriptor->filename;
+ len = descriptor->filenamelen / 2;
+ tmp[len] = 0;
+
+ while(len--)
+ tmp[len] = PHYSFS_swapUBE16(src[len]);
+
+ PHYSFS_utf8FromUcs2(tmp, filename, 255);
+
+ return 0;
+} /* iso_extractfilenameUCS2 */
+
+
+static int iso_extractfilename(ISO9660Handle *handle,
+ ISO9660FileDescriptor *descriptor, char *filename,int *version)
+{
+ if (handle->isjoliet)
+ return iso_extractfilenameUCS2(descriptor, filename, version);
+ else
+ return iso_extractfilenameISO(descriptor, filename, version);
+} /* iso_extractfilename */
+
+/*******************************************************************************
+ * Basic image read functions
+ ******************************************************************************/
+
+static int iso_readimage(ISO9660Handle *handle, PHYSFS_uint64 where,
+ void *buffer, PHYSFS_uint64 len)
+{
+ BAIL_IF_MACRO(!__PHYSFS_platformGrabMutex(handle->mutex), ERRPASS, -1);
+ int rc = -1;
+ if (where != handle->currpos)
+ GOTO_IF_MACRO(!handle->io->seek(handle->io,where), ERRPASS, unlockme);
+ rc = handle->io->read(handle->io, buffer, len);
+ if (rc == -1)
+ {
+ handle->currpos = (PHYSFS_uint64) -1;
+ goto unlockme;
+ } /* if */
+ handle->currpos += rc;
+
+ unlockme:
+ __PHYSFS_platformReleaseMutex(handle->mutex);
+ return rc;
+} /* iso_readimage */
+
+
+static PHYSFS_sint64 iso_readfiledescriptor(ISO9660Handle *handle,
+ PHYSFS_uint64 where,
+ ISO9660FileDescriptor *descriptor)
+{
+ PHYSFS_sint64 rc = iso_readimage(handle, where, descriptor,
+ sizeof (descriptor->recordlen));
+ BAIL_IF_MACRO(rc == -1, ERRPASS, -1);
+ BAIL_IF_MACRO(rc != 1, PHYSFS_ERR_CORRUPT, -1);
+
+ if (descriptor->recordlen == 0)
+ return 0; /* fill bytes at the end of a sector */
+
+ rc = iso_readimage(handle, where + 1, &descriptor->extattributelen,
+ descriptor->recordlen - sizeof(descriptor->recordlen));
+ BAIL_IF_MACRO(rc == -1, ERRPASS, -1);
+ BAIL_IF_MACRO(rc != 1, PHYSFS_ERR_CORRUPT, -1);
+
+ return 0;
+} /* iso_readfiledescriptor */
+
+static void iso_extractsubpath(char *path, char **subpath)
+{
+ *subpath = strchr(path,'/');
+ if (*subpath != 0)
+ {
+ **subpath = 0;
+ *subpath +=1;
+ } /* if */
+} /* iso_extractsubpath */
+
+/*
+ * Don't use path tables, they are not necessarily faster, but more complicated
+ * to implement as they store only directories and not files, so searching for
+ * a file needs to branch to the directory extent sooner or later.
+ */
+static int iso_find_dir_entry(ISO9660Handle *handle,const char *path,
+ ISO9660FileDescriptor *descriptor, int *exists)
+{
+ char *subpath = 0;
+ PHYSFS_uint64 readpos, end_of_dir;
+ char filename[255];
+ char pathcopy[256];
+ char *mypath;
+ int version = 0;
+
+ strcpy(pathcopy, path);
+ mypath = pathcopy;
+ *exists = 0;
+
+ readpos = handle->rootdirstart;
+ end_of_dir = handle->rootdirstart + handle->rootdirsize;
+ iso_extractsubpath(mypath, &subpath);
+ while (1)
+ {
+ BAIL_IF_MACRO(iso_readfiledescriptor(handle, readpos, descriptor), ERRPASS, -1);
+
+ /* recordlen = 0 -> no more entries or fill entry */
+ if (!descriptor->recordlen)
+ {
+ /* if we are in the last sector of the directory & it's 0 -> end */
+ if ((end_of_dir - 2048) <= (readpos -1))
+ break; /* finished */
+
+ /* else skip to the next sector & continue; */
+ readpos = (((readpos - 1) / 2048) + 1) * 2048;
+ continue;
+ } /* if */
+
+ readpos += descriptor->recordlen;
+ if (descriptor->filenamelen == 1 && (descriptor->filename[0] == 0
+ || descriptor->filename[0] == 1))
+ continue; /* special ones, ignore */
+
+ BAIL_IF_MACRO(
+ iso_extractfilename(handle, descriptor, filename, &version),
+ ERRPASS, -1);
+
+ if (strcmp(filename, mypath) == 0)
+ {
+ if ( (subpath == 0) || (subpath[0] == 0) )
+ {
+ *exists = 1;
+ return 0; /* no subpaths left and we found the entry */
+ } /* if */
+
+ if (descriptor->flags.directory)
+ {
+ /* shorten the path to the subpath */
+ mypath = subpath;
+ iso_extractsubpath(mypath, &subpath);
+ /* gosub to the new directory extent */
+ readpos = descriptor->extentpos * 2048;
+ end_of_dir = readpos + descriptor->datalen;
+ } /* if */
+ else
+ {
+ /* we're at a file but have a remaining subpath -> no match */
+ return 0;
+ } /* else */
+ } /* if */
+ } /* while */
+
+ return 0;
+} /* iso_find_dir_entry */
+
+
+static int iso_read_ext_attributes(ISO9660Handle *handle, int block,
+ ISO9660ExtAttributeRec *attributes)
+{
+ return iso_readimage(handle, block * 2048, attributes,
+ sizeof(ISO9660ExtAttributeRec));
+} /* iso_read_ext_attributes */
+
+
+static int ISO9660_flush(PHYSFS_Io *io) { return 1; /* no write support. */ }
+
+static PHYSFS_Io *ISO9660_duplicate(PHYSFS_Io *_io)
+{
+ BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL); /* !!! FIXME: write me. */
+} /* ISO9660_duplicate */
+
+
+static void ISO9660_destroy(PHYSFS_Io *io)
+{
+ ISO9660FileHandle *fhandle = (ISO9660FileHandle*) io->opaque;
+ fhandle->close(fhandle);
+ allocator.Free(io);
+} /* ISO9660_destroy */
+
+
+static PHYSFS_sint64 ISO9660_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
+{
+ ISO9660FileHandle *fhandle = (ISO9660FileHandle*) io->opaque;
+ return fhandle->read(fhandle, buf, len);
+} /* ISO9660_read */
+
+
+static PHYSFS_sint64 ISO9660_write(PHYSFS_Io *io, const void *b, PHYSFS_uint64 l)
+{
+ BAIL_MACRO(PHYSFS_ERR_READ_ONLY, -1);
+} /* ISO9660_write */
+
+
+static PHYSFS_sint64 ISO9660_tell(PHYSFS_Io *io)
+{
+ return ((ISO9660FileHandle*) io->opaque)->currpos;
+} /* ISO9660_tell */
+
+
+static int ISO9660_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
+{
+ ISO9660FileHandle *fhandle = (ISO9660FileHandle*) io->opaque;
+ return fhandle->seek(fhandle, offset);
+} /* ISO9660_seek */
+
+
+static PHYSFS_sint64 ISO9660_length(PHYSFS_Io *io)
+{
+ return ((ISO9660FileHandle*) io->opaque)->filesize;
+} /* ISO9660_length */
+
+
+static const PHYSFS_Io ISO9660_Io =
+{
+ CURRENT_PHYSFS_IO_API_VERSION, NULL,
+ ISO9660_read,
+ ISO9660_write,
+ ISO9660_seek,
+ ISO9660_tell,
+ ISO9660_length,
+ ISO9660_duplicate,
+ ISO9660_flush,
+ ISO9660_destroy
+};
+
+
+/*******************************************************************************
+ * Archive management functions
+ ******************************************************************************/
+
+static void *ISO9660_openArchive(PHYSFS_Io *io, const char *filename, int forWriting)
+{
+ char magicnumber[6];
+ ISO9660Handle *handle;
+ int founddescriptor = 0;
+ int foundjoliet = 0;
+
+ assert(io != NULL); /* shouldn't ever happen. */
+
+ BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
+
+ /* Skip system area to magic number in Volume descriptor */
+ BAIL_IF_MACRO(!io->seek(io, 32769), ERRPASS, NULL);
+ BAIL_IF_MACRO(!io->read(io, magicnumber, 5) != 5, ERRPASS, NULL);
+ if (memcmp(magicnumber, "CD001", 6) != 0)
+ BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
+
+ handle = allocator.Malloc(sizeof(ISO9660Handle));
+ GOTO_IF_MACRO(!handle, PHYSFS_ERR_OUT_OF_MEMORY, errorcleanup);
+ handle->path = 0;
+ handle->mutex= 0;
+ handle->io = NULL;
+
+ handle->path = allocator.Malloc(strlen(filename) + 1);
+ GOTO_IF_MACRO(!handle->path, PHYSFS_ERR_OUT_OF_MEMORY, errorcleanup);
+ strcpy(handle->path, filename);
+
+ handle->mutex = __PHYSFS_platformCreateMutex();
+ GOTO_IF_MACRO(!handle->mutex, ERRPASS, errorcleanup);
+
+ handle->io = io;
+
+ /* seek Primary Volume Descriptor */
+ GOTO_IF_MACRO(!io->seek(io, 32768), PHYSFS_ERR_IO, errorcleanup);
+
+ while (1)
+ {
+ ISO9660VolumeDescriptor descriptor;
+ GOTO_IF_MACRO(io->read(io, &descriptor, sizeof(ISO9660VolumeDescriptor)) != sizeof(ISO9660VolumeDescriptor), PHYSFS_ERR_IO, errorcleanup);
+ GOTO_IF_MACRO(strncmp(descriptor.identifier, "CD001", 5) != 0, PHYSFS_ERR_UNSUPPORTED, errorcleanup);
+
+ if (descriptor.type == 255)
+ {
+ /* type 255 terminates the volume descriptor list */
+ if (founddescriptor)
+ return handle; /* ok, we've found one volume descriptor */
+ else
+ GOTO_MACRO(PHYSFS_ERR_CORRUPT, errorcleanup);
+ } /* if */
+ if (descriptor.type == 1 && !founddescriptor)
+ {
+ handle->currpos = io->tell(io);
+ handle->rootdirstart =
+ descriptor.rootdirectory.extent_location * 2048;
+ handle->rootdirsize =
+ descriptor.rootdirectory.data_length;
+ handle->isjoliet = 0;
+ founddescriptor = 1; /* continue search for joliet */
+ } /* if */
+ if (descriptor.type == 2 && !foundjoliet)
+ {
+ /* check if is joliet */
+ PHYSFS_uint8 *s = descriptor.escape_sequences;
+ int joliet = !(descriptor.flags & 1)
+ && (s[0] == 0x25)
+ && (s[1] == 0x2F)
+ && ((s[2] == 0x40) || (s[2] == 0x43) || (s[2] == 0x45));
+ if (!joliet)
+ continue;
+
+ handle->currpos = io->tell(io);
+ handle->rootdirstart =
+ descriptor.rootdirectory.extent_location * 2048;
+ handle->rootdirsize =
+ descriptor.rootdirectory.data_length;
+ handle->isjoliet = 1;
+ founddescriptor = 1;
+ foundjoliet = 1;
+ } /* if */
+ } /* while */
+
+ GOTO_MACRO(PHYSFS_ERR_CORRUPT, errorcleanup); /* not found. */
+
+errorcleanup:
+ if (handle)
+ {
+ if (handle->path)
+ allocator.Free(handle->path);
+ if (handle->mutex)
+ __PHYSFS_platformDestroyMutex(handle->mutex);
+ allocator.Free(handle);
+ } /* if */
+ return NULL;
+} /* ISO9660_openArchive */
+
+
+static void ISO9660_closeArchive(PHYSFS_Dir *opaque)
+{
+ ISO9660Handle *handle = (ISO9660Handle*) opaque;
+ handle->io->destroy(handle->io);
+ __PHYSFS_platformDestroyMutex(handle->mutex);
+ allocator.Free(handle->path);
+ allocator.Free(handle);
+} /* ISO9660_closeArchive */
+
+
+/*******************************************************************************
+ * Read functions
+ ******************************************************************************/
+
+
+static PHYSFS_uint32 iso_file_read_mem(ISO9660FileHandle *filehandle,
+ void *buffer, PHYSFS_uint64 len)
+{
+ /* check remaining bytes & max obj which can be fetched */
+ const PHYSFS_sint64 bytesleft = filehandle->filesize - filehandle->currpos;
+ if (bytesleft < len)
+ len = bytesleft;
+
+ if (len == 0)
+ return 0;
+
+ memcpy(buffer, filehandle->cacheddata + filehandle->currpos, (size_t) len);
+
+ filehandle->currpos += len;
+ return (PHYSFS_uint32) len;
+} /* iso_file_read_mem */
+
+
+static int iso_file_seek_mem(ISO9660FileHandle *fhandle, PHYSFS_sint64 offset)
+{
+ BAIL_IF_MACRO(offset < 0, PHYSFS_ERR_INVALID_ARGUMENT, 0);
+ BAIL_IF_MACRO(offset >= fhandle->filesize, PHYSFS_ERR_PAST_EOF, 0);
+
+ fhandle->currpos = offset;
+ return 0;
+} /* iso_file_seek_mem */
+
+
+static void iso_file_close_mem(ISO9660FileHandle *fhandle)
+{
+ allocator.Free(fhandle->cacheddata);
+ allocator.Free(fhandle);
+} /* iso_file_close_mem */
+
+
+static PHYSFS_uint32 iso_file_read_foreign(ISO9660FileHandle *filehandle,
+ void *buffer, PHYSFS_uint64 len)
+{
+ /* check remaining bytes & max obj which can be fetched */
+ const PHYSFS_sint64 bytesleft = filehandle->filesize - filehandle->currpos;
+ if (bytesleft < len)
+ len = bytesleft;
+
+ const PHYSFS_sint64 rc = filehandle->io->read(filehandle->io, buffer, len);
+ BAIL_IF_MACRO(rc == -1, ERRPASS, -1);
+
+ filehandle->currpos += rc; /* i trust my internal book keeping */
+ BAIL_IF_MACRO(rc < len, PHYSFS_ERR_CORRUPT, -1);
+ return rc;
+} /* iso_file_read_foreign */
+
+
+static int iso_file_seek_foreign(ISO9660FileHandle *fhandle,
+ PHYSFS_sint64 offset)
+{
+ BAIL_IF_MACRO(offset < 0, PHYSFS_ERR_INVALID_ARGUMENT, 0);
+ BAIL_IF_MACRO(offset >= fhandle->filesize, PHYSFS_ERR_PAST_EOF, 0);
+
+ PHYSFS_sint64 pos = fhandle->startblock * 2048 + offset;
+ BAIL_IF_MACRO(!fhandle->io->seek(fhandle->io, pos), ERRPASS, -1);
+
+ fhandle->currpos = offset;
+ return 0;
+} /* iso_file_seek_foreign */
+
+
+static void iso_file_close_foreign(ISO9660FileHandle *fhandle)
+{
+ fhandle->io->destroy(fhandle->io);
+ allocator.Free(fhandle);
+} /* iso_file_close_foreign */
+
+
+static int iso_file_open_mem(ISO9660Handle *handle, ISO9660FileHandle *fhandle)
+{
+ fhandle->cacheddata = allocator.Malloc(fhandle->filesize);
+ BAIL_IF_MACRO(!fhandle->cacheddata, PHYSFS_ERR_OUT_OF_MEMORY, -1);
+ int rc = iso_readimage(handle, fhandle->startblock * 2048,
+ fhandle->cacheddata, fhandle->filesize);
+ GOTO_IF_MACRO(rc < 0, ERRPASS, freemem);
+ GOTO_IF_MACRO(rc == 0, PHYSFS_ERR_CORRUPT, freemem);
+
+ fhandle->read = iso_file_read_mem;
+ fhandle->seek = iso_file_seek_mem;
+ fhandle->close = iso_file_close_mem;
+ return 0;
+
+freemem:
+ allocator.Free(fhandle->cacheddata);
+ return -1;
+} /* iso_file_open_mem */
+
+
+static int iso_file_open_foreign(ISO9660Handle *handle,
+ ISO9660FileHandle *fhandle)
+{
+ int rc;
+ fhandle->io = __PHYSFS_createNativeIo(handle->path, 'r');
+ BAIL_IF_MACRO(!fhandle->io, ERRPASS, -1);
+ rc = fhandle->io->seek(fhandle->io, fhandle->startblock * 2048);
+ GOTO_IF_MACRO(!rc, ERRPASS, closefile);
+
+ fhandle->read = iso_file_read_foreign;
+ fhandle->seek = iso_file_seek_foreign;
+ fhandle->close = iso_file_close_foreign;
+ return 0;
+
+closefile:
+ fhandle->io->destroy(fhandle->io);
+ return -1;
+} /* iso_file_open_foreign */
+
+
+static PHYSFS_Io *ISO9660_openRead(PHYSFS_Dir *opaque, const char *filename,
+ int *exists)
+{
+ PHYSFS_Io *retval = NULL;
+ ISO9660Handle *handle = (ISO9660Handle*) opaque;
+ ISO9660FileHandle *fhandle;
+ ISO9660FileDescriptor descriptor;
+ int rc;
+
+ fhandle = allocator.Malloc(sizeof(ISO9660FileHandle));
+ BAIL_IF_MACRO(fhandle == 0, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+ fhandle->cacheddata = 0;
+
+ retval = allocator.Malloc(sizeof(PHYSFS_Io));
+ GOTO_IF_MACRO(retval == 0, PHYSFS_ERR_OUT_OF_MEMORY, errorhandling);
+
+ /* find file descriptor */
+ rc = iso_find_dir_entry(handle, filename, &descriptor, exists);
+ GOTO_IF_MACRO(rc, ERRPASS, errorhandling);
+ GOTO_IF_MACRO(!*exists, PHYSFS_ERR_NO_SUCH_PATH, errorhandling);
+
+ fhandle->startblock = descriptor.extentpos + descriptor.extattributelen;
+ fhandle->filesize = descriptor.datalen;
+ fhandle->currpos = 0;
+ fhandle->isohandle = handle;
+ fhandle->cacheddata = NULL;
+ fhandle->io = NULL;
+
+ if (descriptor.datalen <= ISO9660_FULLCACHEMAXSIZE)
+ rc = iso_file_open_mem(handle, fhandle);
+ else
+ rc = iso_file_open_foreign(handle, fhandle);
+ GOTO_IF_MACRO(rc, ERRPASS, errorhandling);
+
+ memcpy(retval, &ISO9660_Io, sizeof (PHYSFS_Io));
+ retval->opaque = fhandle;
+ return retval;
+
+errorhandling:
+ if (retval) allocator.Free(retval);
+ if (fhandle) allocator.Free(fhandle);
+ return NULL;
+} /* ISO9660_openRead */
+
+
+
+/*******************************************************************************
+ * Information gathering functions
+ ******************************************************************************/
+
+static void ISO9660_enumerateFiles(PHYSFS_Dir *opaque, const char *dname,
+ int omitSymLinks,
+ PHYSFS_EnumFilesCallback cb,
+ const char *origdir, void *callbackdata)
+{
+ ISO9660Handle *handle = (ISO9660Handle*) opaque;
+ ISO9660FileDescriptor descriptor;
+ PHYSFS_uint64 readpos;
+ PHYSFS_uint64 end_of_dir;
+ char filename[130]; /* ISO allows 31, Joliet 128 -> 128 + 2 eol bytes */
+ int version = 0;
+
+ if (*dname == '\0')
+ {
+ readpos = handle->rootdirstart;
+ end_of_dir = readpos + handle->rootdirsize;
+ } /* if */
+ else
+ {
+ printf("pfad %s\n",dname);
+ int exists = 0;
+ BAIL_IF_MACRO(iso_find_dir_entry(handle,dname, &descriptor, &exists), ERRPASS,);
+ BAIL_IF_MACRO(!exists, ERRPASS, );
+ BAIL_IF_MACRO(!descriptor.flags.directory, ERRPASS,);
+
+ readpos = descriptor.extentpos * 2048;
+ end_of_dir = readpos + descriptor.datalen;
+ } /* else */
+
+ while (1)
+ {
+ BAIL_IF_MACRO(iso_readfiledescriptor(handle, readpos, &descriptor), ERRPASS, );
+
+ /* recordlen = 0 -> no more entries or fill entry */
+ if (!descriptor.recordlen)
+ {
+ /* if we are in the last sector of the directory & it's 0 -> end */
+ if ((end_of_dir - 2048) <= (readpos -1))
+ break; /* finished */
+
+ /* else skip to the next sector & continue; */
+ readpos = (((readpos - 1) / 2048) + 1) * 2048;
+ continue;
+ } /* if */
+
+ readpos += descriptor.recordlen;
+ if (descriptor.filenamelen == 1 && (descriptor.filename[0] == 0
+ || descriptor.filename[0] == 1))
+ continue; /* special ones, ignore */
+
+ strncpy(filename,descriptor.filename,descriptor.filenamelen);
+ iso_extractfilename(handle, &descriptor, filename, &version);
+ cb(callbackdata, origdir,filename);
+ } /* while */
+} /* ISO9660_enumerateFiles */
+
+
+static int ISO9660_stat(PHYSFS_Dir *opaque, const char *name, int *exists,
+ PHYSFS_Stat *stat)
+{
+ ISO9660Handle *handle = (ISO9660Handle*) opaque;
+ ISO9660FileDescriptor descriptor;
+ ISO9660ExtAttributeRec extattr;
+ BAIL_IF_MACRO(iso_find_dir_entry(handle, name, &descriptor, exists), ERRPASS, -1);
+ if (!*exists)
+ return 0;
+
+ stat->readonly = 1;
+
+ /* try to get extended info */
+ if (descriptor.extattributelen)
+ {
+ BAIL_IF_MACRO(iso_read_ext_attributes(handle,
+ descriptor.extentpos, &extattr), ERRPASS, -1);
+ stat->createtime = iso_volume_mktime(&extattr.create_time);
+ stat->modtime = iso_volume_mktime(&extattr.mod_time);
+ stat->accesstime = iso_volume_mktime(&extattr.mod_time);
+ } /* if */
+ else
+ {
+ stat->createtime = iso_mktime(&descriptor.recordtime);
+ stat->modtime = iso_mktime(&descriptor.recordtime);
+ stat->accesstime = iso_mktime(&descriptor.recordtime);
+ } /* else */
+
+ if (descriptor.flags.directory)
+ {
+ stat->filesize = 0;
+ stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
+ } /* if */
+ else
+ {
+ stat->filesize = descriptor.datalen;
+ stat->filetype = PHYSFS_FILETYPE_REGULAR;
+ } /* else */
+
+ return 1;
+} /* ISO9660_stat */
+
+
+/*******************************************************************************
+ * Not supported functions
+ ******************************************************************************/
+
+static PHYSFS_Io *ISO9660_openWrite(PHYSFS_Dir *opaque, const char *name)
+{
+ BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
+} /* ISO9660_openWrite */
+
+
+static PHYSFS_Io *ISO9660_openAppend(PHYSFS_Dir *opaque, const char *name)
+{
+ BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
+} /* ISO9660_openAppend */
+
+
+static int ISO9660_remove(PHYSFS_Dir *opaque, const char *name)
+{
+ BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
+} /* ISO9660_remove */
+
+
+static int ISO9660_mkdir(PHYSFS_Dir *opaque, const char *name)
+{
+ BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
+} /* ISO9660_mkdir */
+
+
+const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660 =
+{
+ {
+ "ISO",
+ "ISO9660 image file",
+ "Christoph Nelles <evilazrael@evilazrael.de>",
+ "http://www.evilazrael.de/",
+ },
+ ISO9660_openArchive, /* openArchive() method */
+ ISO9660_enumerateFiles, /* enumerateFiles() method */
+ ISO9660_openRead, /* openRead() method */
+ ISO9660_openWrite, /* openWrite() method */
+ ISO9660_openAppend, /* openAppend() method */
+ ISO9660_remove, /* remove() method */
+ ISO9660_mkdir, /* mkdir() method */
+ ISO9660_closeArchive, /* closeArchive() method */
+ ISO9660_stat /* stat() method */
+};
+
+#endif /* defined PHYSFS_SUPPORTS_ISO9660 */
+
+/* end of archiver_iso9660.c ... */
+