| 1 | /* op.h
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| 2 | *
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| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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| 4 | * 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and others
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| 5 | *
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| 6 | * You may distribute under the terms of either the GNU General Public
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| 7 | * License or the Artistic License, as specified in the README file.
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| 8 | *
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| 9 | */
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| 10 |
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| 11 | /*
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| 12 | * The fields of BASEOP are:
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| 13 | * op_next Pointer to next ppcode to execute after this one.
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| 14 | * (Top level pre-grafted op points to first op,
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| 15 | * but this is replaced when op is grafted in, when
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| 16 | * this op will point to the real next op, and the new
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| 17 | * parent takes over role of remembering starting op.)
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| 18 | * op_ppaddr Pointer to current ppcode's function.
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| 19 | * op_type The type of the operation.
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| 20 | * op_flags Flags common to all operations. See OPf_* below.
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| 21 | * op_private Flags peculiar to a particular operation (BUT,
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| 22 | * by default, set to the number of children until
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| 23 | * the operation is privatized by a check routine,
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| 24 | * which may or may not check number of children).
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| 25 | */
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| 26 |
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| 27 | #ifdef DEBUGGING_OPS
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| 28 | #define OPCODE opcode
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| 29 | #else
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| 30 | #define OPCODE U16
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| 31 | #endif
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| 32 |
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| 33 | #ifdef BASEOP_DEFINITION
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| 34 | #define BASEOP BASEOP_DEFINITION
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| 35 | #else
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| 36 | #define BASEOP \
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| 37 | OP* op_next; \
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| 38 | OP* op_sibling; \
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| 39 | OP* (CPERLscope(*op_ppaddr))(pTHX); \
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| 40 | PADOFFSET op_targ; \
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| 41 | OPCODE op_type; \
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| 42 | U16 op_seq; \
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| 43 | U8 op_flags; \
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| 44 | U8 op_private;
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| 45 | #endif
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| 46 |
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| 47 | #define OP_GIMME(op,dfl) \
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| 48 | (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
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| 49 | ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
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| 50 | ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
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| 51 | dfl)
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| 52 |
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| 53 | /*
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| 54 | =head1 "Gimme" Values
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| 55 |
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| 56 | =for apidoc Amn|U32|GIMME_V
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| 57 | The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
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| 58 | C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
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| 59 | respectively.
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| 60 |
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| 61 | =for apidoc Amn|U32|GIMME
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| 62 | A backward-compatible version of C<GIMME_V> which can only return
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| 63 | C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
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| 64 | Deprecated. Use C<GIMME_V> instead.
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| 65 |
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| 66 | =cut
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| 67 | */
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| 68 |
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