diff options
Diffstat (limited to 'Source/external/physfs/physfs_archiver_unpacked.c')
| -rw-r--r-- | Source/external/physfs/physfs_archiver_unpacked.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/Source/external/physfs/physfs_archiver_unpacked.c b/Source/external/physfs/physfs_archiver_unpacked.c new file mode 100644 index 0000000..575efef --- /dev/null +++ b/Source/external/physfs/physfs_archiver_unpacked.c @@ -0,0 +1,305 @@ +/* + * 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. Dirs and files allowed, but 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_DirTree tree; + PHYSFS_Io *io; +} UNPKinfo; + +typedef struct +{ + __PHYSFS_DirTreeEntry tree; + PHYSFS_uint64 startPos; + PHYSFS_uint64 size; + PHYSFS_sint64 ctime; + PHYSFS_sint64 mtime; +} UNPKentry; + +typedef struct +{ + PHYSFS_Io *io; + UNPKentry *entry; + PHYSFS_uint32 curPos; +} UNPKfileinfo; + + +void UNPK_closeArchive(void *opaque) +{ + UNPKinfo *info = ((UNPKinfo *) opaque); + if (info) + { + __PHYSFS_DirTreeDeinit(&info->tree); + + if (info->io) + info->io->destroy(info->io); + + allocator.Free(info); + } /* if */ +} /* UNPK_closeArchive */ + +void UNPK_abandonArchive(void *opaque) +{ + UNPKinfo *info = ((UNPKinfo *) opaque); + if (info) + { + info->io = NULL; + UNPK_closeArchive(info); + } /* if */ +} /* UNPK_abandonArchive */ + +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(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(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(!retval, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_duplicate_failed); + GOTO_IF(!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 inline UNPKentry *findEntry(UNPKinfo *info, const char *path) +{ + return (UNPKentry *) __PHYSFS_DirTreeFind(&info->tree, path); +} /* findEntry */ + + +PHYSFS_Io *UNPK_openRead(void *opaque, const char *name) +{ + PHYSFS_Io *retval = NULL; + UNPKinfo *info = (UNPKinfo *) opaque; + UNPKfileinfo *finfo = NULL; + UNPKentry *entry = findEntry(info, name); + + BAIL_IF_ERRPASS(!entry, NULL); + BAIL_IF(entry->tree.isdir, PHYSFS_ERR_NOT_A_FILE, NULL); + + retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io)); + GOTO_IF(!retval, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_openRead_failed); + + finfo = (UNPKfileinfo *) allocator.Malloc(sizeof (UNPKfileinfo)); + GOTO_IF(!finfo, PHYSFS_ERR_OUT_OF_MEMORY, UNPK_openRead_failed); + + finfo->io = info->io->duplicate(info->io); + GOTO_IF_ERRPASS(!finfo->io, 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(void *opaque, const char *name) +{ + BAIL(PHYSFS_ERR_READ_ONLY, NULL); +} /* UNPK_openWrite */ + + +PHYSFS_Io *UNPK_openAppend(void *opaque, const char *name) +{ + BAIL(PHYSFS_ERR_READ_ONLY, NULL); +} /* UNPK_openAppend */ + + +int UNPK_remove(void *opaque, const char *name) +{ + BAIL(PHYSFS_ERR_READ_ONLY, 0); +} /* UNPK_remove */ + + +int UNPK_mkdir(void *opaque, const char *name) +{ + BAIL(PHYSFS_ERR_READ_ONLY, 0); +} /* UNPK_mkdir */ + + +int UNPK_stat(void *opaque, const char *path, PHYSFS_Stat *stat) +{ + UNPKinfo *info = (UNPKinfo *) opaque; + const UNPKentry *entry = findEntry(info, path); + + BAIL_IF_ERRPASS(!entry, 0); + + if (entry->tree.isdir) + { + stat->filetype = PHYSFS_FILETYPE_DIRECTORY; + stat->filesize = 0; + } /* if */ + else + { + stat->filetype = PHYSFS_FILETYPE_REGULAR; + stat->filesize = entry->size; + } /* else */ + + stat->modtime = entry->mtime; + stat->createtime = entry->ctime; + stat->accesstime = -1; + stat->readonly = 1; + + return 1; +} /* UNPK_stat */ + + +void *UNPK_addEntry(void *opaque, char *name, const int isdir, + const PHYSFS_sint64 ctime, const PHYSFS_sint64 mtime, + const PHYSFS_uint64 pos, const PHYSFS_uint64 len) +{ + UNPKinfo *info = (UNPKinfo *) opaque; + UNPKentry *entry; + + entry = (UNPKentry *) __PHYSFS_DirTreeAdd(&info->tree, name, isdir); + BAIL_IF_ERRPASS(!entry, NULL); + + entry->startPos = isdir ? 0 : pos; + entry->size = isdir ? 0 : len; + entry->ctime = ctime; + entry->mtime = mtime; + + return entry; +} /* UNPK_addEntry */ + + +void *UNPK_openArchive(PHYSFS_Io *io) +{ + UNPKinfo *info = (UNPKinfo *) allocator.Malloc(sizeof (UNPKinfo)); + BAIL_IF(!info, PHYSFS_ERR_OUT_OF_MEMORY, NULL); + + if (!__PHYSFS_DirTreeInit(&info->tree, sizeof (UNPKentry))) + { + allocator.Free(info); + return NULL; + } /* if */ + + info->io = io; + + return info; +} /* UNPK_openArchive */ + +/* end of physfs_archiver_unpacked.c ... */ + |