bytecode.h

   1 typedef char *pvcontents;
   2 typedef char *strconst;
   3 typedef U32 PV;
   4 typedef char *op_tr_array;
   5 typedef int comment;
   6 typedef SV *svindex;
   7 typedef OP *opindex;
   8 typedef IV IV64;
   9
  10 EXT int iv_overflows INIT(0);
  11
  12 EXT SV *sv;
  13 #ifndef USE_THREADS
  14 EXT OP *op;
  15 #endif
  16 EXT XPV pv;
  17
  18 EXT void **obj_list;
  19 EXT I32 obj_list_fill INIT(-1);
  20
  21 #ifdef INDIRECT_BGET_MACROS
  22 #define BGET_FREAD(argp, len, nelem)    \
  23          bs.fread((char*)(argp),(len),(nelem),bs.data)
  24 #define BGET_FGETC() bs.fgetc(bs.data)
  25 #else
  26 #define BGET_FREAD(argp, len, nelem) PerlIO_read(fp, (argp), (len)*(nelem))
  27 #define BGET_FGETC() PerlIO_getc(fp)
  28 #endif /* INDIRECT_BGET_MACROS */
  29
  30 #define BGET_U32(arg)   \
  31         BGET_FREAD(&arg, sizeof(U32), 1); arg = ntohl((U32)arg)
  32 #define BGET_I32(arg)   \
  33         BGET_FREAD(&arg, sizeof(I32), 1); arg = (I32)ntohl((U32)arg)
  34 #define BGET_U16(arg)   \
  35         BGET_FREAD(&arg, sizeof(U16), 1); arg = ntohs((U16)arg)
  36 #define BGET_U8(arg)    arg = BGET_FGETC()
  37
  38 #if INDIRECT_BGET_MACROS
  39 #define BGET_PV(arg)    STMT_START {    \
  40         BGET_U32(arg);                  \
  41         if (arg)                        \
  42             bs.freadpv(arg, bs.data);   \
  43         else {                          \
  44             pv.xpv_pv = 0;              \
  45             pv.xpv_len = 0;             \
  46             pv.xpv_cur = 0;             \
  47         }                               \
  48     } STMT_END
  49 #else
  50 #define BGET_PV(arg)    STMT_START {            \
  51         BGET_U32(arg);                          \
  52         if (arg) {                              \
  53             New(666, pv.xpv_pv, arg, char);     \
  54             PerlIO_read(fp, pv.xpv_pv, arg);    \
  55             pv.xpv_len = arg;                   \
  56             pv.xpv_cur = arg - 1;               \
  57         } else {                                \
  58             pv.xpv_pv = 0;                      \
  59             pv.xpv_len = 0;                     \
  60             pv.xpv_cur = 0;                     \
  61         }                                       \
  62     } STMT_END
  63 #endif /* INDIRECT_BGET_MACROS */
  64
  65 #define BGET_comment(arg) \
  66         do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
  67
  68 /*
  69  * In the following, sizeof(IV)*4 is just a way of encoding 32 on 64-bit-IV
  70  * machines such that 32-bit machine compilers don't whine about the shift
  71  * count being too high even though the code is never reached there.
  72  */
  73 #define BGET_IV64(arg) STMT_START {                     \
  74         U32 hi, lo;                                     \
  75         BGET_U32(hi);                                   \
  76         BGET_U32(lo);                                   \
  77         if (sizeof(IV) == 8)                            \
  78             arg = (IV) (hi << (sizeof(IV)*4) | lo);     \
  79         else if (((I32)hi == -1 && (I32)lo < 0)         \
  80                  || ((I32)hi == 0 && (I32)lo >= 0)) {   \
  81             arg = (I32)lo;                              \
  82         }                                               \
  83         else {                                          \
  84             iv_overflows++;                             \
  85             arg = 0;                                    \
  86         }                                               \
  87     } STMT_END
  88
  89 #define BGET_op_tr_array(arg) do {      \
  90         unsigned short *ary;            \
  91         int i;                          \
  92         New(666, ary, 256, unsigned short); \
  93         BGET_FREAD(ary, 256, 2);        \
  94         for (i = 0; i < 256; i++)       \
  95             ary[i] = ntohs(ary[i]);     \
  96         arg = (char *) ary;             \
  97     } while (0)
  98
  99 #define BGET_pvcontents(arg)    arg = pv.xpv_pv
 100 #define BGET_strconst(arg) STMT_START { \
 101         for (arg = tokenbuf; (*arg = BGET_FGETC()); arg++) /* nothing */; \
 102         arg = tokenbuf;                 \
 103     } STMT_END
 104
 105 #define BGET_double(arg) STMT_START {   \
 106         char *str;                      \
 107         BGET_strconst(str);             \
 108         arg = atof(str);                \
 109     } STMT_END
 110
 111 #define BGET_objindex(arg) STMT_START { \
 112         U32 ix;                         \
 113         BGET_U32(ix);                   \
 114         arg = obj_list[ix];             \
 115     } STMT_END
 116
 117 #define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
 118
 119 #define BSET_sv_refcnt_add(svrefcnt, arg)       svrefcnt += arg
 120 #define BSET_gp_refcnt_add(gprefcnt, arg)       gprefcnt += arg
 121 #define BSET_gp_share(sv, arg) STMT_START {     \
 122         gp_free((GV*)sv);                       \
 123         GvGP(sv) = GvGP(arg);                   \
 124     } STMT_END
 125
 126 #define BSET_gv_fetchpv(sv, arg)        sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
 127 #define BSET_gv_stashpv(sv, arg)        sv = (SV*)gv_stashpv(arg, TRUE)
 128 #define BSET_sv_magic(sv, arg)          sv_magic(sv, Nullsv, arg, 0, 0)
 129 #define BSET_mg_pv(mg, arg)     mg->mg_ptr = arg; mg->mg_len = pv.xpv_cur
 130 #define BSET_sv_upgrade(sv, arg)        (void)SvUPGRADE(sv, arg)
 131 #define BSET_xpv(sv)    do {    \
 132         SvPV_set(sv, pv.xpv_pv);        \
 133         SvCUR_set(sv, pv.xpv_cur);      \
 134         SvLEN_set(sv, pv.xpv_len);      \
 135     } while (0)
 136 #define BSET_av_extend(sv, arg) av_extend((AV*)sv, arg)
 137
 138 #define BSET_av_push(sv, arg)   av_push((AV*)sv, arg)
 139 #define BSET_hv_store(sv, arg)  \
 140         hv_store((HV*)sv, pv.xpv_pv, pv.xpv_cur, arg, 0)
 141 #define BSET_pv_free(pv)        Safefree(pv.xpv_pv)
 142 #define BSET_pregcomp(o, arg) \
 143         ((PMOP*)o)->op_pmregexp = arg ? \
 144                 pregcomp(arg, arg + pv.xpv_cur, ((PMOP*)o)) : 0
 145 #define BSET_newsv(sv, arg)     sv = NEWSV(666,0); SvUPGRADE(sv, arg)
 146 #define BSET_newop(o, arg)      o = (OP*)safemalloc(optype_size[arg])
 147 #define BSET_newopn(o, arg) STMT_START {        \
 148         OP *oldop = o;                          \
 149         BSET_newop(o, arg);                     \
 150         oldop->op_next = o;                     \
 151     } STMT_END
 152
 153 #define BSET_ret(foo) return
 154
 155 /*
 156  * Kludge special-case workaround for OP_MAPSTART
 157  * which needs the ppaddr for OP_GREPSTART. Blech.
 158  */
 159 #define BSET_op_type(o, arg) STMT_START {       \
 160         o->op_type = arg;                       \
 161         if (arg == OP_MAPSTART)                 \
 162             arg = OP_GREPSTART;                 \
 163         o->op_ppaddr = ppaddr[arg];             \
 164     } STMT_END
 165 #define BSET_op_ppaddr(o, arg) croak("op_ppaddr not yet implemented")
 166 #define BSET_curpad(pad, arg) pad = AvARRAY(arg)
 167
 168 #define BSET_OBJ_STORE(obj, ix)         \
 169         (I32)ix > obj_list_fill ?       \
 170         bset_obj_store(obj, (I32)ix) : (obj_list[ix] = obj)