| Guido van Rossum | d4d7728 | 1994-08-19 10:51:31 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Macintosh version of UNIX directory access package |
| 3 | * (opendir, readdir, closedir). |
| 4 | * Public domain by Guido van Rossum, CWI, Amsterdam (July 1987). |
| 5 | */ |
| 6 | |
| 7 | #include "dirent.h" |
| 8 | #include "macdefs.h" |
| 9 | |
| 10 | static DIR opened; |
| 11 | |
| 12 | /* |
| 13 | * Open a directory. This means calling PBOpenWD. |
| 14 | * The value returned is always the address of opened, or NULL. |
| 15 | * (I have as yet no use for multiple open directories; this could |
| 16 | * be implemented by allocating memory dynamically.) |
| 17 | */ |
| 18 | |
| 19 | DIR * |
| 20 | opendir(path) |
| 21 | char *path; |
| 22 | { |
| 23 | union { |
| 24 | WDPBRec d; |
| 25 | VolumeParam v; |
| 26 | } pb; |
| 27 | char ppath[MAXPATH]; |
| 28 | short err; |
| 29 | |
| 30 | if (opened.nextfile != 0) { |
| 31 | errno = EBUSY; |
| 32 | return NULL; /* A directory is already open. */ |
| 33 | } |
| 34 | strncpy(ppath+1, path, ppath[0]= strlen(path)); |
| 35 | pb.d.ioNamePtr= (unsigned char *)ppath; |
| 36 | pb.d.ioVRefNum= 0; |
| 37 | if (hfsrunning()) { |
| 38 | pb.d.ioWDProcID= 0; |
| 39 | pb.d.ioWDDirID= 0; |
| 40 | err= PBOpenWD((WDPBPtr)&pb, FALSE); |
| 41 | } |
| 42 | else { |
| 43 | pb.v.ioVolIndex= 0; |
| 44 | err= PBGetVInfo((ParmBlkPtr)&pb, FALSE); |
| 45 | } |
| 46 | if (err != noErr) { |
| 47 | errno = ENOENT; |
| 48 | return NULL; |
| 49 | } |
| 50 | opened.dirid= pb.d.ioVRefNum; |
| 51 | opened.nextfile= 1; |
| 52 | return &opened; |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | * Close a directory. |
| 57 | */ |
| 58 | |
| 59 | void |
| 60 | closedir(dirp) |
| 61 | DIR *dirp; |
| 62 | { |
| 63 | if (hfsrunning()) { |
| 64 | WDPBRec pb; |
| 65 | |
| 66 | pb.ioVRefNum= dirp->dirid; |
| 67 | (void) PBCloseWD(&pb, FALSE); |
| 68 | } |
| 69 | dirp->dirid= 0; |
| 70 | dirp->nextfile= 0; |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Read the next directory entry. |
| 75 | */ |
| 76 | |
| 77 | struct dirent * |
| 78 | readdir(dp) |
| 79 | DIR *dp; |
| 80 | { |
| 81 | union { |
| 82 | DirInfo d; |
| 83 | FileParam f; |
| 84 | HFileInfo hf; |
| 85 | } pb; |
| 86 | short err; |
| 87 | static struct dirent dir; |
| 88 | |
| 89 | dir.d_name[0]= 0; |
| 90 | pb.d.ioNamePtr= (unsigned char *)dir.d_name; |
| 91 | pb.d.ioVRefNum= dp->dirid; |
| 92 | pb.d.ioFDirIndex= dp->nextfile++; |
| 93 | pb.d.ioDrDirID= 0; |
| 94 | if (hfsrunning()) |
| 95 | err= PBGetCatInfo((CInfoPBPtr)&pb, FALSE); |
| 96 | else |
| 97 | err= PBGetFInfo((ParmBlkPtr)&pb, FALSE); |
| 98 | if (err != noErr) { |
| 99 | errno = EIO; |
| 100 | return NULL; |
| 101 | } |
| 102 | (void) p2cstr((unsigned char *)dir.d_name); |
| 103 | return &dir; |
| 104 | } |