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1/* XSUB.h
2 *
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3 * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
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11#ifndef _INC_PERL_XSUB_H
12#define _INC_PERL_XSUB_H 1
13
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14/* first, some documentation for xsubpp-generated items */
15
16/*
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17=head1 Variables created by C<xsubpp> and C<xsubpp> internal functions
18
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19=for apidoc Amn|char*|CLASS
20Variable which is setup by C<xsubpp> to indicate the
21class name for a C++ XS constructor. This is always a C<char*>. See C<THIS>.
22
23=for apidoc Amn|(whatever)|RETVAL
24Variable which is setup by C<xsubpp> to hold the return value for an
25XSUB. This is always the proper type for the XSUB. See
26L<perlxs/"The RETVAL Variable">.
27
28=for apidoc Amn|(whatever)|THIS
29Variable which is setup by C<xsubpp> to designate the object in a C++
30XSUB. This is always the proper type for the C++ object. See C<CLASS> and
31L<perlxs/"Using XS With C++">.
32
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33=for apidoc Amn|I32|ax
34Variable which is setup by C<xsubpp> to indicate the stack base offset,
35used by the C<ST>, C<XSprePUSH> and C<XSRETURN> macros. The C<dMARK> macro
36must be called prior to setup the C<MARK> variable.
37
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38=for apidoc Amn|I32|items
39Variable which is setup by C<xsubpp> to indicate the number of
40items on the stack. See L<perlxs/"Variable-length Parameter Lists">.
41
42=for apidoc Amn|I32|ix
43Variable which is setup by C<xsubpp> to indicate which of an
44XSUB's aliases was used to invoke it. See L<perlxs/"The ALIAS: Keyword">.
45
46=for apidoc Am|SV*|ST|int ix
47Used to access elements on the XSUB's stack.
48
49=for apidoc AmU||XS
50Macro to declare an XSUB and its C parameter list. This is handled by
51C<xsubpp>.
52
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53=for apidoc Ams||dAX
54Sets up the C<ax> variable.
55This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>.
56
57=for apidoc Ams||dITEMS
58Sets up the C<items> variable.
59This is usually handled automatically by C<xsubpp> by calling C<dXSARGS>.
60
954c1994 61=for apidoc Ams||dXSARGS
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62Sets up stack and mark pointers for an XSUB, calling dSP and dMARK.
63Sets up the C<ax> and C<items> variables by calling C<dAX> and C<dITEMS>.
64This is usually handled automatically by C<xsubpp>.
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65
66=for apidoc Ams||dXSI32
67Sets up the C<ix> variable for an XSUB which has aliases. This is usually
68handled automatically by C<xsubpp>.
69
70=cut
71*/
72
3280af22 73#define ST(off) PL_stack_base[ax + (off)]
a0d0e21e 74
d308986b 75#if defined(__CYGWIN__) && defined(USE_DYNAMIC_LOADING)
acfe0abc 76# define XS(name) __declspec(dllexport) void name(pTHX_ CV* cv)
cea2e8a9 77#else
acfe0abc 78# define XS(name) void name(pTHX_ CV* cv)
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79#endif
80
349b520e 81#define dAX I32 ax = MARK - PL_stack_base + 1
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82
83#define dITEMS I32 items = SP - MARK
84
a0d0e21e 85#define dXSARGS \
3c78fafa 86 dSP; dMARK; \
9f2ea798 87 dAX; dITEMS
a0d0e21e 88
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89#define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \
90 ? PAD_SV(PL_op->op_targ) : sv_newmortal())
91
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92/* Should be used before final PUSHi etc. if not in PPCODE section. */
93#define XSprePUSH (sp = PL_stack_base + ax - 1)
94
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95#define XSANY CvXSUBANY(cv)
96
97#define dXSI32 I32 ix = XSANY.any_i32
98
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99#ifdef __cplusplus
100# define XSINTERFACE_CVT(ret,name) ret (*name)(...)
101#else
102# define XSINTERFACE_CVT(ret,name) ret (*name)()
103#endif
104#define dXSFUNCTION(ret) XSINTERFACE_CVT(ret,XSFUNCTION)
2554589c 105#define XSINTERFACE_FUNC(ret,cv,f) ((XSINTERFACE_CVT(ret,))(f))
cfc02341 106#define XSINTERFACE_FUNC_SET(cv,f) \
a12c3db7 107 CvXSUBANY(cv).any_dxptr = (void (*) (pTHX_ void*))(f)
cfc02341 108
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109/* Simple macros to put new mortal values onto the stack. */
110/* Typically used to return values from XS functions. */
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111
112/*
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113=head1 Stack Manipulation Macros
114
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115=for apidoc Am|void|XST_mIV|int pos|IV iv
116Place an integer into the specified position C<pos> on the stack. The
117value is stored in a new mortal SV.
118
119=for apidoc Am|void|XST_mNV|int pos|NV nv
120Place a double into the specified position C<pos> on the stack. The value
121is stored in a new mortal SV.
122
123=for apidoc Am|void|XST_mPV|int pos|char* str
124Place a copy of a string into the specified position C<pos> on the stack.
125The value is stored in a new mortal SV.
126
127=for apidoc Am|void|XST_mNO|int pos
128Place C<&PL_sv_no> into the specified position C<pos> on the
129stack.
130
131=for apidoc Am|void|XST_mYES|int pos
132Place C<&PL_sv_yes> into the specified position C<pos> on the
133stack.
134
135=for apidoc Am|void|XST_mUNDEF|int pos
136Place C<&PL_sv_undef> into the specified position C<pos> on the
137stack.
138
139=for apidoc Am|void|XSRETURN|int nitems
140Return from XSUB, indicating number of items on the stack. This is usually
141handled by C<xsubpp>.
142
143=for apidoc Am|void|XSRETURN_IV|IV iv
144Return an integer from an XSUB immediately. Uses C<XST_mIV>.
145
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146=for apidoc Am|void|XSRETURN_UV|IV uv
147Return an integer from an XSUB immediately. Uses C<XST_mUV>.
148
954c1994 149=for apidoc Am|void|XSRETURN_NV|NV nv
d1be9408 150Return a double from an XSUB immediately. Uses C<XST_mNV>.
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151
152=for apidoc Am|void|XSRETURN_PV|char* str
153Return a copy of a string from an XSUB immediately. Uses C<XST_mPV>.
154
155=for apidoc Ams||XSRETURN_NO
156Return C<&PL_sv_no> from an XSUB immediately. Uses C<XST_mNO>.
157
158=for apidoc Ams||XSRETURN_YES
159Return C<&PL_sv_yes> from an XSUB immediately. Uses C<XST_mYES>.
160
161=for apidoc Ams||XSRETURN_UNDEF
162Return C<&PL_sv_undef> from an XSUB immediately. Uses C<XST_mUNDEF>.
163
164=for apidoc Ams||XSRETURN_EMPTY
165Return an empty list from an XSUB immediately.
166
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167=head1 Variables created by C<xsubpp> and C<xsubpp> internal functions
168
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169=for apidoc AmU||newXSproto
170Used by C<xsubpp> to hook up XSUBs as Perl subs. Adds Perl prototypes to
171the subs.
172
173=for apidoc AmU||XS_VERSION
174The version identifier for an XS module. This is usually
175handled automatically by C<ExtUtils::MakeMaker>. See C<XS_VERSION_BOOTCHECK>.
176
177=for apidoc Ams||XS_VERSION_BOOTCHECK
178Macro to verify that a PM module's $VERSION variable matches the XS
179module's C<XS_VERSION> variable. This is usually handled automatically by
180C<xsubpp>. See L<perlxs/"The VERSIONCHECK: Keyword">.
181
182=cut
183*/
184
4633a7c4 185#define XST_mIV(i,v) (ST(i) = sv_2mortal(newSViv(v)) )
108ccc45 186#define XST_mUV(i,v) (ST(i) = sv_2mortal(newSVuv(v)) )
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187#define XST_mNV(i,v) (ST(i) = sv_2mortal(newSVnv(v)) )
188#define XST_mPV(i,v) (ST(i) = sv_2mortal(newSVpv(v,0)))
79cb57f6 189#define XST_mPVN(i,v,n) (ST(i) = sv_2mortal(newSVpvn(v,n)))
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190#define XST_mNO(i) (ST(i) = &PL_sv_no )
191#define XST_mYES(i) (ST(i) = &PL_sv_yes )
192#define XST_mUNDEF(i) (ST(i) = &PL_sv_undef)
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193
194#define XSRETURN(off) \
195 STMT_START { \
196 PL_stack_sp = PL_stack_base + ax + ((off) - 1); \
197 return; \
198 } STMT_END
199
80b92232 200#define XSRETURN_IV(v) STMT_START { XST_mIV(0,v); XSRETURN(1); } STMT_END
108ccc45 201#define XSRETURN_UV(v) STMT_START { XST_mUV(0,v); XSRETURN(1); } STMT_END
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202#define XSRETURN_NV(v) STMT_START { XST_mNV(0,v); XSRETURN(1); } STMT_END
203#define XSRETURN_PV(v) STMT_START { XST_mPV(0,v); XSRETURN(1); } STMT_END
954c1994 204#define XSRETURN_PVN(v,n) STMT_START { XST_mPVN(0,v,n); XSRETURN(1); } STMT_END
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205#define XSRETURN_NO STMT_START { XST_mNO(0); XSRETURN(1); } STMT_END
206#define XSRETURN_YES STMT_START { XST_mYES(0); XSRETURN(1); } STMT_END
207#define XSRETURN_UNDEF STMT_START { XST_mUNDEF(0); XSRETURN(1); } STMT_END
208#define XSRETURN_EMPTY STMT_START { XSRETURN(0); } STMT_END
382b8d97 209
37120919 210#define newXSproto(a,b,c,d) sv_setpv((SV*)newXS(a,b,c), d)
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211
212#ifdef XS_VERSION
c6af7a1a 213# define XS_VERSION_BOOTCHECK \
774d564b 214 STMT_START { \
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215 SV *tmpsv; STRLEN n_a; \
216 char *vn = Nullch, *module = SvPV(ST(0),n_a); \
774d564b 217 if (items >= 2) /* version supplied as bootstrap arg */ \
6b88bc9c 218 tmpsv = ST(1); \
774d564b 219 else { \
46fc3d4c 220 /* XXX GV_ADDWARN */ \
cea2e8a9 221 tmpsv = get_sv(Perl_form(aTHX_ "%s::%s", module, \
864dbfa3 222 vn = "XS_VERSION"), FALSE); \
6b88bc9c 223 if (!tmpsv || !SvOK(tmpsv)) \
cea2e8a9 224 tmpsv = get_sv(Perl_form(aTHX_ "%s::%s", module, \
864dbfa3 225 vn = "VERSION"), FALSE); \
774d564b 226 } \
2d8e6c8d 227 if (tmpsv && (!SvOK(tmpsv) || strNE(XS_VERSION, SvPV(tmpsv, n_a)))) \
894356b3 228 Perl_croak(aTHX_ "%s object version %s does not match %s%s%s%s %"SVf,\
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229 module, XS_VERSION, \
230 vn ? "$" : "", vn ? module : "", vn ? "::" : "", \
6b88bc9c 231 vn ? vn : "bootstrap parameter", tmpsv); \
80b92232 232 } STMT_END
720fb644 233#else
c6af7a1a 234# define XS_VERSION_BOOTCHECK
720fb644 235#endif
76e3520e 236
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237/*
238 The DBM_setFilter & DBM_ckFilter macros are only used by
239 the *DB*_File modules
240*/
241
242#define DBM_setFilter(db_type,code) \
243 { \
244 if (db_type) \
245 RETVAL = sv_mortalcopy(db_type) ; \
246 ST(0) = RETVAL ; \
247 if (db_type && (code == &PL_sv_undef)) { \
248 SvREFCNT_dec(db_type) ; \
249 db_type = NULL ; \
250 } \
251 else if (code) { \
252 if (db_type) \
253 sv_setsv(db_type, code) ; \
254 else \
255 db_type = newSVsv(code) ; \
256 } \
257 }
258
259#define DBM_ckFilter(arg,type,name) \
260 if (db->type) { \
261 if (db->filtering) { \
262 croak("recursion detected in %s", name) ; \
263 } \
264 ENTER ; \
265 SAVETMPS ; \
266 SAVEINT(db->filtering) ; \
267 db->filtering = TRUE ; \
268 SAVESPTR(DEFSV) ; \
269 DEFSV = arg ; \
270 SvTEMP_off(arg) ; \
271 PUSHMARK(SP) ; \
272 PUTBACK ; \
273 (void) perl_call_sv(db->type, G_DISCARD); \
274 SPAGAIN ; \
275 PUTBACK ; \
276 FREETMPS ; \
277 LEAVE ; \
278 }
279
51371543 280#if 1 /* for compatibility */
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281# define VTBL_sv &PL_vtbl_sv
282# define VTBL_env &PL_vtbl_env
283# define VTBL_envelem &PL_vtbl_envelem
284# define VTBL_sig &PL_vtbl_sig
285# define VTBL_sigelem &PL_vtbl_sigelem
286# define VTBL_pack &PL_vtbl_pack
287# define VTBL_packelem &PL_vtbl_packelem
288# define VTBL_dbline &PL_vtbl_dbline
289# define VTBL_isa &PL_vtbl_isa
290# define VTBL_isaelem &PL_vtbl_isaelem
291# define VTBL_arylen &PL_vtbl_arylen
292# define VTBL_glob &PL_vtbl_glob
293# define VTBL_mglob &PL_vtbl_mglob
294# define VTBL_nkeys &PL_vtbl_nkeys
295# define VTBL_taint &PL_vtbl_taint
296# define VTBL_substr &PL_vtbl_substr
297# define VTBL_vec &PL_vtbl_vec
298# define VTBL_pos &PL_vtbl_pos
299# define VTBL_bm &PL_vtbl_bm
300# define VTBL_fm &PL_vtbl_fm
301# define VTBL_uvar &PL_vtbl_uvar
302# define VTBL_defelem &PL_vtbl_defelem
303# define VTBL_regexp &PL_vtbl_regexp
304# define VTBL_regdata &PL_vtbl_regdata
305# define VTBL_regdatum &PL_vtbl_regdatum
306# ifdef USE_LOCALE_COLLATE
307# define VTBL_collxfrm &PL_vtbl_collxfrm
308# endif
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309# define VTBL_amagic &PL_vtbl_amagic
310# define VTBL_amagicelem &PL_vtbl_amagicelem
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311#endif
312
6f4183fe 313#include "perlapi.h"
c6af7a1a 314
e8ee3774 315#if defined(PERL_IMPLICIT_CONTEXT) && !defined(PERL_NO_GET_CONTEXT) && !defined(PERL_CORE)
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316# undef aTHX
317# undef aTHX_
54aff467
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318# define aTHX PERL_GET_THX
319# define aTHX_ aTHX,
54aff467
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320#endif
321
acfe0abc 322#if defined(PERL_IMPLICIT_SYS) && !defined(PERL_CORE)
c6af7a1a 323# ifndef NO_XSLOCKS
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324# if defined (NETWARE) && defined (USE_STDIO)
325# define times PerlProc_times
326# define setuid PerlProc_setuid
327# define setgid PerlProc_setgid
328# define getpid PerlProc_getpid
329# define pause PerlProc_pause
330# define exit PerlProc_exit
331# define _exit PerlProc__exit
332# else
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333# undef closedir
334# undef opendir
335# undef stdin
336# undef stdout
337# undef stderr
338# undef feof
339# undef ferror
340# undef fgetpos
341# undef ioctl
342# undef getlogin
343# undef setjmp
344# undef getc
345# undef ungetc
346# undef fileno
347
cb69f87a 348/* Following symbols were giving redefinition errors while building extensions - sgp 17th Oct 2000 */
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349#ifdef NETWARE
350# undef readdir
351# undef fstat
352# undef stat
353# undef longjmp
354# undef endhostent
355# undef endnetent
356# undef endprotoent
357# undef endservent
358# undef gethostbyaddr
359# undef gethostbyname
360# undef gethostent
361# undef getnetbyaddr
362# undef getnetbyname
363# undef getnetent
364# undef getprotobyname
365# undef getprotobynumber
366# undef getprotoent
367# undef getservbyname
368# undef getservbyport
369# undef getservent
370# undef inet_ntoa
371# undef sethostent
372# undef setnetent
373# undef setprotoent
374# undef setservent
375#endif /* NETWARE */
376
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377# undef socketpair
378
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379# define mkdir PerlDir_mkdir
380# define chdir PerlDir_chdir
381# define rmdir PerlDir_rmdir
382# define closedir PerlDir_close
383# define opendir PerlDir_open
384# define readdir PerlDir_read
385# define rewinddir PerlDir_rewind
386# define seekdir PerlDir_seek
387# define telldir PerlDir_tell
388# define putenv PerlEnv_putenv
389# define getenv PerlEnv_getenv
b2af26b1 390# define uname PerlEnv_uname
197357d0
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391# define stdin PerlSIO_stdin
392# define stdout PerlSIO_stdout
393# define stderr PerlSIO_stderr
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394# define fopen PerlSIO_fopen
395# define fclose PerlSIO_fclose
396# define feof PerlSIO_feof
397# define ferror PerlSIO_ferror
b6d726d6 398# define clearerr PerlSIO_clearerr
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399# define getc PerlSIO_getc
400# define fputc PerlSIO_fputc
401# define fputs PerlSIO_fputs
402# define fflush PerlSIO_fflush
403# define ungetc PerlSIO_ungetc
404# define fileno PerlSIO_fileno
405# define fdopen PerlSIO_fdopen
406# define freopen PerlSIO_freopen
407# define fread PerlSIO_fread
408# define fwrite PerlSIO_fwrite
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409# define setbuf PerlSIO_setbuf
410# define setvbuf PerlSIO_setvbuf
411# define setlinebuf PerlSIO_setlinebuf
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412# define stdoutf PerlSIO_stdoutf
413# define vfprintf PerlSIO_vprintf
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414# define ftell PerlSIO_ftell
415# define fseek PerlSIO_fseek
416# define fgetpos PerlSIO_fgetpos
417# define fsetpos PerlSIO_fsetpos
418# define frewind PerlSIO_rewind
419# define tmpfile PerlSIO_tmpfile
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420# define access PerlLIO_access
421# define chmod PerlLIO_chmod
422# define chsize PerlLIO_chsize
423# define close PerlLIO_close
424# define dup PerlLIO_dup
425# define dup2 PerlLIO_dup2
426# define flock PerlLIO_flock
427# define fstat PerlLIO_fstat
428# define ioctl PerlLIO_ioctl
429# define isatty PerlLIO_isatty
6b980173 430# define link PerlLIO_link
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431# define lseek PerlLIO_lseek
432# define lstat PerlLIO_lstat
433# define mktemp PerlLIO_mktemp
434# define open PerlLIO_open
435# define read PerlLIO_read
436# define rename PerlLIO_rename
437# define setmode PerlLIO_setmode
4f49e16e 438# define stat(buf,sb) PerlLIO_stat(buf,sb)
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439# define tmpnam PerlLIO_tmpnam
440# define umask PerlLIO_umask
441# define unlink PerlLIO_unlink
442# define utime PerlLIO_utime
443# define write PerlLIO_write
444# define malloc PerlMem_malloc
445# define realloc PerlMem_realloc
446# define free PerlMem_free
447# define abort PerlProc_abort
448# define exit PerlProc_exit
449# define _exit PerlProc__exit
450# define execl PerlProc_execl
451# define execv PerlProc_execv
452# define execvp PerlProc_execvp
453# define getuid PerlProc_getuid
454# define geteuid PerlProc_geteuid
455# define getgid PerlProc_getgid
456# define getegid PerlProc_getegid
457# define getlogin PerlProc_getlogin
458# define kill PerlProc_kill
459# define killpg PerlProc_killpg
460# define pause PerlProc_pause
461# define popen PerlProc_popen
462# define pclose PerlProc_pclose
463# define pipe PerlProc_pipe
464# define setuid PerlProc_setuid
465# define setgid PerlProc_setgid
466# define sleep PerlProc_sleep
467# define times PerlProc_times
468# define wait PerlProc_wait
469# define setjmp PerlProc_setjmp
470# define longjmp PerlProc_longjmp
471# define signal PerlProc_signal
7766f137 472# define getpid PerlProc_getpid
57ab3dfe 473# define gettimeofday PerlProc_gettimeofday
c6af7a1a
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474# define htonl PerlSock_htonl
475# define htons PerlSock_htons
476# define ntohl PerlSock_ntohl
477# define ntohs PerlSock_ntohs
478# define accept PerlSock_accept
479# define bind PerlSock_bind
480# define connect PerlSock_connect
481# define endhostent PerlSock_endhostent
482# define endnetent PerlSock_endnetent
483# define endprotoent PerlSock_endprotoent
484# define endservent PerlSock_endservent
485# define gethostbyaddr PerlSock_gethostbyaddr
486# define gethostbyname PerlSock_gethostbyname
487# define gethostent PerlSock_gethostent
488# define gethostname PerlSock_gethostname
489# define getnetbyaddr PerlSock_getnetbyaddr
490# define getnetbyname PerlSock_getnetbyname
491# define getnetent PerlSock_getnetent
492# define getpeername PerlSock_getpeername
493# define getprotobyname PerlSock_getprotobyname
494# define getprotobynumber PerlSock_getprotobynumber
495# define getprotoent PerlSock_getprotoent
496# define getservbyname PerlSock_getservbyname
497# define getservbyport PerlSock_getservbyport
498# define getservent PerlSock_getservent
499# define getsockname PerlSock_getsockname
500# define getsockopt PerlSock_getsockopt
501# define inet_addr PerlSock_inet_addr
502# define inet_ntoa PerlSock_inet_ntoa
503# define listen PerlSock_listen
504# define recv PerlSock_recv
505# define recvfrom PerlSock_recvfrom
506# define select PerlSock_select
507# define send PerlSock_send
508# define sendto PerlSock_sendto
509# define sethostent PerlSock_sethostent
510# define setnetent PerlSock_setnetent
511# define setprotoent PerlSock_setprotoent
512# define setservent PerlSock_setservent
513# define setsockopt PerlSock_setsockopt
514# define shutdown PerlSock_shutdown
515# define socket PerlSock_socket
516# define socketpair PerlSock_socketpair
2986a63f 517# endif /* NETWARE && USE_STDIO */
21c5e947
JH
518
519# ifdef USE_SOCKETS_AS_HANDLES
520# undef fd_set
521# undef FD_SET
522# undef FD_CLR
523# undef FD_ISSET
524# undef FD_ZERO
525# define fd_set Perl_fd_set
526# define FD_SET(n,p) PERL_FD_SET(n,p)
527# define FD_CLR(n,p) PERL_FD_CLR(n,p)
528# define FD_ISSET(n,p) PERL_FD_ISSET(n,p)
529# define FD_ZERO(p) PERL_FD_ZERO(p)
530# endif /* USE_SOCKETS_AS_HANDLES */
531
c6af7a1a 532# endif /* NO_XSLOCKS */
acfe0abc 533#endif /* PERL_IMPLICIT_SYS && !PERL_CORE */
b4ba0ab9 534
cfeeb022 535#endif /* _INC_PERL_XSUB_H */ /* include guard */