bytecode.h

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