ext/NDBM_File/NDBM_File.xs

   1 #define PERL_NO_GET_CONTEXT
   2
   3 #include "EXTERN.h"
   4 #include "perl.h"
   5 #include "XSUB.h"
   6 #undef NDBM_HEADER_USES_PROTOTYPES
   7 #if defined(I_GDBM_NDBM)
   8 #  ifdef GDBM_NDBM_H_USES_PROTOTYPES
   9 #    define NDBM_HEADER_USES_PROTOTYPES
  10 START_EXTERN_C
  11 #  endif
  12 #  include <gdbm-ndbm.h> /* Debian compatibility version */
  13 #elif defined(I_GDBMNDBM)
  14 #  ifdef GDBMNDBM_H_USES_PROTOTYPES
  15 #    define NDBM_HEADER_USES_PROTOTYPES
  16 START_EXTERN_C
  17 #  endif
  18 #  include <gdbm/ndbm.h> /* RedHat compatibility version */
  19 #elif defined(I_NDBM)
  20 #  ifdef NDBM_H_USES_PROTOTYPES
  21 #    define NDBM_HEADER_USES_PROTOTYPES
  22 START_EXTERN_C
  23 #  endif
  24 #  include <ndbm.h>
  25 #endif
  26 #ifdef NDBM_HEADER_USES_PROTOTYPES
  27 END_EXTERN_C
  28 #endif
  29
  30 #define fetch_key 0
  31 #define store_key 1
  32 #define fetch_value 2
  33 #define store_value 3
  34
  35 typedef struct {
  36         DBM *   dbp ;
  37         SV *    filter[4];
  38         int     filtering ;
  39         } NDBM_File_type;
  40
  41 typedef NDBM_File_type * NDBM_File ;
  42 typedef datum datum_key ;
  43 typedef datum datum_value ;
  44
  45
  46 #if defined(__cplusplus) && !defined(NDBM_HEADER_USES_PROTOTYPES)
  47 /* gdbm's header file used for compatibility with gdbm */
  48 /* isn't compatible to C++ syntax, so we need these */
  49 /* declarations to make everyone happy. */
  50 EXTERN_C DBM *dbm_open(const char *, int, mode_t);
  51 EXTERN_C void dbm_close(DBM *);
  52 EXTERN_C datum dbm_fetch(DBM *, datum);
  53 EXTERN_C int dbm_store(DBM *, datum, datum, int);
  54 EXTERN_C int dbm_delete(DBM *, datum);
  55 EXTERN_C datum dbm_firstkey(DBM *);
  56 EXTERN_C datum dbm_nextkey(DBM *);
  57 #endif
  58
  59 MODULE = NDBM_File      PACKAGE = NDBM_File     PREFIX = ndbm_
  60
  61 NDBM_File
  62 ndbm_TIEHASH(dbtype, filename, flags, mode)
  63         char *          dbtype
  64         char *          filename
  65         int             flags
  66         int             mode
  67         CODE:
  68         {
  69             DBM *       dbp ;
  70
  71             RETVAL = NULL ;
  72             if ((dbp =  dbm_open(filename, flags, mode))) {
  73                 RETVAL = (NDBM_File)safecalloc(1, sizeof(NDBM_File_type));
  74                 RETVAL->dbp = dbp ;
  75             }
  76
  77         }
  78         OUTPUT:
  79           RETVAL
  80
  81 void
  82 ndbm_DESTROY(db)
  83         NDBM_File       db
  84         PREINIT:
  85         int i = store_value;
  86         CODE:
  87         dbm_close(db->dbp);
  88         do {
  89             if (db->filter[i])
  90                 SvREFCNT_dec(db->filter[i]);
  91         } while (i-- > 0);
  92         safefree(db);
  93
  94 #define ndbm_FETCH(db,key)                      dbm_fetch(db->dbp,key)
  95 datum_value
  96 ndbm_FETCH(db, key)
  97         NDBM_File       db
  98         datum_key       key
  99
 100 #define ndbm_STORE(db,key,value,flags)          dbm_store(db->dbp,key,value,flags)
 101 int
 102 ndbm_STORE(db, key, value, flags = DBM_REPLACE)
 103         NDBM_File       db
 104         datum_key       key
 105         datum_value     value
 106         int             flags
 107     CLEANUP:
 108         if (RETVAL) {
 109             if (RETVAL < 0 && errno == EPERM)
 110                 croak("No write permission to ndbm file");
 111             croak("ndbm store returned %d, errno %d, key \"%s\"",
 112                   RETVAL, errno, (const char *)key.dptr);
 113             dbm_clearerr(db->dbp);
 114         }
 115
 116 #define ndbm_DELETE(db,key)                     dbm_delete(db->dbp,key)
 117 int
 118 ndbm_DELETE(db, key)
 119         NDBM_File       db
 120         datum_key       key
 121
 122 #define ndbm_FIRSTKEY(db)                       dbm_firstkey(db->dbp)
 123 datum_key
 124 ndbm_FIRSTKEY(db)
 125         NDBM_File       db
 126
 127 #define ndbm_NEXTKEY(db,key)                    dbm_nextkey(db->dbp)
 128 datum_key
 129 ndbm_NEXTKEY(db, key)
 130         NDBM_File       db
 131         datum_key       key = NO_INIT
 132
 133 #define ndbm_error(db)                          dbm_error(db->dbp)
 134 int
 135 ndbm_error(db)
 136         NDBM_File       db
 137
 138 #define ndbm_clearerr(db)                       dbm_clearerr(db->dbp)
 139 void
 140 ndbm_clearerr(db)
 141         NDBM_File       db
 142
 143
 144 SV *
 145 filter_fetch_key(db, code)
 146         NDBM_File       db
 147         SV *            code
 148         SV *            RETVAL = &PL_sv_undef ;
 149         ALIAS:
 150         NDBM_File::filter_fetch_key = fetch_key
 151         NDBM_File::filter_store_key = store_key
 152         NDBM_File::filter_fetch_value = fetch_value
 153         NDBM_File::filter_store_value = store_value
 154         CODE:
 155             DBM_setFilter(db->filter[ix], code);