ext/GDBM_File/GDBM_File.xs

   1 #include "EXTERN.h"
   2 #include "perl.h"
   3 #include "XSUB.h"
   4
   5 #include <gdbm.h>
   6 #include <fcntl.h>
   7
   8 typedef struct {
   9         GDBM_FILE       dbp ;
  10         SV *    filter_fetch_key ;
  11         SV *    filter_store_key ;
  12         SV *    filter_fetch_value ;
  13         SV *    filter_store_value ;
  14         int     filtering ;
  15         } GDBM_File_type;
  16
  17 typedef GDBM_File_type * GDBM_File ;
  18 typedef datum datum_key ;
  19 typedef datum datum_value ;
  20 typedef datum datum_key_copy;
  21
  22 #define GDBM_BLOCKSIZE 0 /* gdbm defaults to stat blocksize */
  23
  24 typedef void (*FATALFUNC)();
  25
  26 #ifndef GDBM_FAST
  27 static int
  28 not_here(char *s)
  29 {
  30     croak("GDBM_File::%s not implemented on this architecture", s);
  31     return -1;
  32 }
  33 #endif
  34
  35 /* GDBM allocates the datum with system malloc() and expects the user
  36  * to free() it.  So we either have to free() it immediately, or have
  37  * perl free() it when it deallocates the SV, depending on whether
  38  * perl uses malloc()/free() or not. */
  39 static void
  40 output_datum(pTHX_ SV *arg, char *str, int size)
  41 {
  42         sv_setpvn(arg, str, size);
  43         free(str);
  44 }
  45
  46 /* Versions of gdbm prior to 1.7x might not have the gdbm_sync,
  47    gdbm_exists, and gdbm_setopt functions.  Apparently Slackware
  48    (Linux) 2.1 contains gdbm-1.5 (which dates back to 1991).
  49 */
  50 #ifndef GDBM_FAST
  51 #define gdbm_exists(db,key) not_here("gdbm_exists")
  52 #define gdbm_sync(db) (void) not_here("gdbm_sync")
  53 #define gdbm_setopt(db,optflag,optval,optlen) not_here("gdbm_setopt")
  54 #endif
  55
  56 #include "const-c.inc"
  57
  58 MODULE = GDBM_File      PACKAGE = GDBM_File     PREFIX = gdbm_
  59
  60 INCLUDE: const-xs.inc
  61
  62 GDBM_File
  63 gdbm_TIEHASH(dbtype, name, read_write, mode, fatal_func = (FATALFUNC)croak)
  64         char *          dbtype
  65         char *          name
  66         int             read_write
  67         int             mode
  68         FATALFUNC       fatal_func
  69         CODE:
  70         {
  71             GDBM_FILE   dbp ;
  72
  73             RETVAL = NULL ;
  74             if ((dbp =  gdbm_open(name, GDBM_BLOCKSIZE, read_write, mode, fatal_func))) {
  75                 RETVAL = (GDBM_File)safemalloc(sizeof(GDBM_File_type)) ;
  76                 Zero(RETVAL, 1, GDBM_File_type) ;
  77                 RETVAL->dbp = dbp ;
  78             }
  79
  80         }
  81         OUTPUT:
  82           RETVAL
  83
  84
  85 #define gdbm_close(db)                  gdbm_close(db->dbp)
  86 void
  87 gdbm_close(db)
  88         GDBM_File       db
  89         CLEANUP:
  90
  91 void
  92 gdbm_DESTROY(db)
  93         GDBM_File       db
  94         CODE:
  95         gdbm_close(db);
  96         safefree(db);
  97
  98 #define gdbm_FETCH(db,key)                      gdbm_fetch(db->dbp,key)
  99 datum_value
 100 gdbm_FETCH(db, key)
 101         GDBM_File       db
 102         datum_key_copy  key
 103
 104 #define gdbm_STORE(db,key,value,flags)          gdbm_store(db->dbp,key,value,flags)
 105 int
 106 gdbm_STORE(db, key, value, flags = GDBM_REPLACE)
 107         GDBM_File       db
 108         datum_key       key
 109         datum_value     value
 110         int             flags
 111     CLEANUP:
 112         if (RETVAL) {
 113             if (RETVAL < 0 && errno == EPERM)
 114                 croak("No write permission to gdbm file");
 115             croak("gdbm store returned %d, errno %d, key \"%.*s\"",
 116                         RETVAL,errno,key.dsize,key.dptr);
 117         }
 118
 119 #define gdbm_DELETE(db,key)                     gdbm_delete(db->dbp,key)
 120 int
 121 gdbm_DELETE(db, key)
 122         GDBM_File       db
 123         datum_key       key
 124
 125 #define gdbm_FIRSTKEY(db)                       gdbm_firstkey(db->dbp)
 126 datum_key
 127 gdbm_FIRSTKEY(db)
 128         GDBM_File       db
 129
 130 #define gdbm_NEXTKEY(db,key)                    gdbm_nextkey(db->dbp,key)
 131 datum_key
 132 gdbm_NEXTKEY(db, key)
 133         GDBM_File       db
 134         datum_key       key
 135
 136 #define gdbm_reorganize(db)                     gdbm_reorganize(db->dbp)
 137 int
 138 gdbm_reorganize(db)
 139         GDBM_File       db
 140
 141
 142 #define gdbm_sync(db)                           gdbm_sync(db->dbp)
 143 void
 144 gdbm_sync(db)
 145         GDBM_File       db
 146
 147 #define gdbm_EXISTS(db,key)                     gdbm_exists(db->dbp,key)
 148 int
 149 gdbm_EXISTS(db, key)
 150         GDBM_File       db
 151         datum_key       key
 152
 153 #define gdbm_setopt(db,optflag, optval, optlen) gdbm_setopt(db->dbp,optflag, optval, optlen)
 154 int
 155 gdbm_setopt (db, optflag, optval, optlen)
 156         GDBM_File       db
 157         int             optflag
 158         int             &optval
 159         int             optlen
 160
 161
 162 SV *
 163 filter_fetch_key(db, code)
 164         GDBM_File       db
 165         SV *            code
 166         SV *            RETVAL = &PL_sv_undef ;
 167         CODE:
 168             DBM_setFilter(db->filter_fetch_key, code) ;
 169
 170 SV *
 171 filter_store_key(db, code)
 172         GDBM_File       db
 173         SV *            code
 174         SV *            RETVAL =  &PL_sv_undef ;
 175         CODE:
 176             DBM_setFilter(db->filter_store_key, code) ;
 177
 178 SV *
 179 filter_fetch_value(db, code)
 180         GDBM_File       db
 181         SV *            code
 182         SV *            RETVAL =  &PL_sv_undef ;
 183         CODE:
 184             DBM_setFilter(db->filter_fetch_value, code) ;
 185
 186 SV *
 187 filter_store_value(db, code)
 188         GDBM_File       db
 189         SV *            code
 190         SV *            RETVAL =  &PL_sv_undef ;
 191         CODE:
 192             DBM_setFilter(db->filter_store_value, code) ;
 193