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1/* $RCSfile: sv.h,v $$Revision: 4.1 $$Date: 92/08/07 18:26:57 $
2 *
3 * Copyright (c) 1991, Larry Wall
4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
8 * $Log: sv.h,v $
9 * Revision 4.1 92/08/07 18:26:57 lwall
10 *
11 * Revision 4.0.1.4 92/06/08 15:41:45 lwall
12 * patch20: fixed confusion between a *var's real name and its effective name
13 * patch20: removed implicit int declarations on functions
14 *
15 * Revision 4.0.1.3 91/11/05 18:41:47 lwall
16 * patch11: random cleanup
17 * patch11: solitary subroutine references no longer trigger typo warnings
18 *
19 * Revision 4.0.1.2 91/06/07 11:58:33 lwall
20 * patch4: new copyright notice
21 *
22 * Revision 4.0.1.1 91/04/12 09:16:12 lwall
23 * patch1: you may now use "die" and "caller" in a signal handler
24 *
25 * Revision 4.0 91/03/20 01:40:04 lwall
26 * 4.0 baseline.
27 *
28 */
29
30typedef enum {
31 SVt_NULL,
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32 SVt_IV,
33 SVt_NV,
ed6116ce 34 SVt_RV,
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35 SVt_PV,
36 SVt_PVIV,
37 SVt_PVNV,
38 SVt_PVMG,
39 SVt_PVLV,
40 SVt_PVAV,
41 SVt_PVHV,
42 SVt_PVCV,
43 SVt_PVGV,
44 SVt_PVBM,
45 SVt_PVFM,
46} svtype;
47
48/* Compensate for ANSI C misdesign... */
49#ifdef DEBUGGING
50#define SVTYPE svtype
51#else
52#define SVTYPE U8
53#endif
54
55/* Using C's structural equivalence to help emulate C++ inheritance here... */
56
57struct sv {
463ee0b2 58 void* sv_any; /* pointer to something */
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59 U32 sv_refcnt; /* how many references to us */
60 SVTYPE sv_type; /* what sort of thing pointer points to */
61 U8 sv_flags; /* extra flags, some depending on type */
62 U8 sv_storage; /* storage class */
63 U8 sv_private; /* extra value, depending on type */
64};
65
66struct gv {
463ee0b2 67 XPVGV* sv_any; /* pointer to something */
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68 U32 sv_refcnt; /* how many references to us */
69 SVTYPE sv_type; /* what sort of thing pointer points to */
70 U8 sv_flags; /* extra flags, some depending on type */
71 U8 sv_storage; /* storage class */
72 U8 sv_private; /* extra value, depending on type */
73};
74
75struct cv {
463ee0b2 76 XPVGV* sv_any; /* pointer to something */
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77 U32 sv_refcnt; /* how many references to us */
78 SVTYPE sv_type; /* what sort of thing pointer points to */
79 U8 sv_flags; /* extra flags, some depending on type */
80 U8 sv_storage; /* storage class */
81 U8 sv_private; /* extra value, depending on type */
82};
83
84struct av {
463ee0b2 85 XPVAV* sv_any; /* pointer to something */
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86 U32 sv_refcnt; /* how many references to us */
87 SVTYPE sv_type; /* what sort of thing pointer points to */
88 U8 sv_flags; /* extra flags, some depending on type */
89 U8 sv_storage; /* storage class */
90 U8 sv_private; /* extra value, depending on type */
91};
92
93struct hv {
463ee0b2 94 XPVHV* sv_any; /* pointer to something */
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95 U32 sv_refcnt; /* how many references to us */
96 SVTYPE sv_type; /* what sort of thing pointer points to */
97 U8 sv_flags; /* extra flags, some depending on type */
98 U8 sv_storage; /* storage class */
99 U8 sv_private; /* extra value, depending on type */
100};
101
463ee0b2 102#define SvANY(sv) (sv)->sv_any
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103#define SvTYPE(sv) (sv)->sv_type
104#define SvREFCNT(sv) (sv)->sv_refcnt
105#define SvFLAGS(sv) (sv)->sv_flags
106#define SvSTORAGE(sv) (sv)->sv_storage
107#define SvPRIVATE(sv) (sv)->sv_private
108
109#define SvUPGRADE(sv, mt) (SvTYPE(sv) >= mt || sv_upgrade(sv, mt))
110
111#define SVf_IOK 1 /* has valid integer value */
112#define SVf_NOK 2 /* has valid numeric value */
113#define SVf_POK 4 /* has valid pointer value */
114#define SVf_OOK 8 /* has valid offset value */
ed6116ce 115#define SVf_ROK 16 /* has a valid reference pointer */
463ee0b2 116#define SVf_OK 32 /* has defined value */
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117#define SVf_MAGICAL 64 /* has special methods */
118#define SVf_THINKFIRST 128 /* may not be changed without thought */
119
120#define SVs_PADBUSY 1 /* reserved for tmp or my already */
121#define SVs_PADTMP 2 /* in use as tmp */
122#define SVs_PADMY 4 /* in use a "my" variable */
123#define SVs_8 8
124#define SVs_16 16
125#define SVs_TEMP 32 /* string is stealable? */
126#define SVs_OBJECT 64 /* is "blessed" */
127#define SVs_READONLY 128 /* may not be modified */
79072805 128
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129#define SVp_IOK 1 /* has valid non-public integer value */
130#define SVp_NOK 2 /* has valid non-public numeric value */
131#define SVp_POK 4 /* has valid non-public pointer value */
132#define SVp_SCREAM 8 /* has been studied? */
133#define SVp_TAINTEDDIR 16 /* PATH component is a security risk */
79072805 134
463ee0b2 135#define SVpfm_COMPILED 128
79072805 136
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137#define SVpbm_VALID 128
138#define SVpbm_CASEFOLD 64
139#define SVpbm_TAIL 32
79072805 140
463ee0b2 141#define SVpgv_MULTI 128
79072805 142
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143struct xrv {
144 SV * xrv_rv; /* pointer to another SV */
145};
146
79072805 147struct xpv {
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148 char * xpv_pv; /* pointer to malloced string */
149 STRLEN xpv_cur; /* length of xpv_pv as a C string */
150 STRLEN xpv_len; /* allocated size */
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151};
152
153struct xpviv {
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154 char * xpv_pv; /* pointer to malloced string */
155 STRLEN xpv_cur; /* length of xpv_pv as a C string */
156 STRLEN xpv_len; /* allocated size */
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157 I32 xiv_iv; /* integer value or pv offset */
158};
159
160struct xpvnv {
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161 char * xpv_pv; /* pointer to malloced string */
162 STRLEN xpv_cur; /* length of xpv_pv as a C string */
163 STRLEN xpv_len; /* allocated size */
79072805 164 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 165 double xnv_nv; /* numeric value, if any */
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166};
167
168struct xpvmg {
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169 char * xpv_pv; /* pointer to malloced string */
170 STRLEN xpv_cur; /* length of xpv_pv as a C string */
171 STRLEN xpv_len; /* allocated size */
79072805 172 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 173 double xnv_nv; /* numeric value, if any */
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174 MAGIC* xmg_magic; /* linked list of magicalness */
175 HV* xmg_stash; /* class package */
176};
177
178struct xpvlv {
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179 char * xpv_pv; /* pointer to malloced string */
180 STRLEN xpv_cur; /* length of xpv_pv as a C string */
181 STRLEN xpv_len; /* allocated size */
79072805 182 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 183 double xnv_nv; /* numeric value, if any */
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184 MAGIC* xmg_magic; /* linked list of magicalness */
185 HV* xmg_stash; /* class package */
186 STRLEN xlv_targoff;
187 STRLEN xlv_targlen;
188 SV* xlv_targ;
189 char xlv_type;
190};
191
192struct xpvgv {
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193 char * xpv_pv; /* pointer to malloced string */
194 STRLEN xpv_cur; /* length of xpv_pv as a C string */
195 STRLEN xpv_len; /* allocated size */
79072805 196 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 197 double xnv_nv; /* numeric value, if any */
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198 MAGIC* xmg_magic; /* linked list of magicalness */
199 HV* xmg_stash; /* class package */
200 GP* xgv_gp;
201 char* xgv_name;
202 STRLEN xgv_namelen;
203 HV* xgv_stash;
204};
205
206struct xpvbm {
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207 char * xpv_pv; /* pointer to malloced string */
208 STRLEN xpv_cur; /* length of xpv_pv as a C string */
209 STRLEN xpv_len; /* allocated size */
79072805 210 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 211 double xnv_nv; /* numeric value, if any */
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212 MAGIC* xmg_magic; /* linked list of magicalness */
213 HV* xmg_stash; /* class package */
214 I32 xbm_useful; /* is this constant pattern being useful? */
215 U16 xbm_previous; /* how many characters in string before rare? */
216 U8 xbm_rare; /* rarest character in string */
217};
218
219struct xpvfm {
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220 char * xpv_pv; /* pointer to malloced string */
221 STRLEN xpv_cur; /* length of xpv_pv as a C string */
222 STRLEN xpv_len; /* allocated size */
79072805 223 I32 xiv_iv; /* integer value or pv offset */
ed6116ce 224 double xnv_nv; /* numeric value, if any */
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225 MAGIC* xmg_magic; /* linked list of magicalness */
226 HV* xmg_stash; /* class package */
227 HV * xcv_stash;
228 OP * xcv_start;
229 OP * xcv_root;
230 I32 (*xcv_usersub)();
231 I32 xcv_userindex;
232 GV * xcv_filegv;
233 long xcv_depth; /* >= 2 indicates recursive call */
234 AV * xcv_padlist;
235 bool xcv_deleted;
236 I32 xfm_lines;
237};
238
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239/* The following macros define implementation-independent predicates on SVs. */
240
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241#define SvNIOK(sv) (SvFLAGS(sv) & (SVf_IOK|SVf_NOK))
242
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243#define SvOK(sv) (SvFLAGS(sv) & SVf_OK)
244#define SvOK_on(sv) (SvFLAGS(sv) |= SVf_OK)
245#define SvOK_off(sv) (SvFLAGS(sv) &= \
246 ~(SVf_IOK|SVf_NOK|SVf_POK|SVf_OK), \
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247 SvOOK_off(sv))
248
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249#define SvOKp(sv) (SvPRIVATE(sv) & (SVp_IOK|SVp_NOK|SVp_POK))
250#define SvIOKp(sv) (SvPRIVATE(sv) & SVp_IOK)
251#define SvIOKp_on(sv) (SvOOK_off(sv), SvPRIVATE(sv) |= SVp_IOK)
252#define SvNOKp(sv) (SvPRIVATE(sv) & SVp_NOK)
253#define SvNOKp_on(sv) (SvPRIVATE(sv) |= SVp_NOK)
254#define SvPOKp(sv) (SvPRIVATE(sv) & SVp_POK)
255#define SvPOKp_on(sv) (SvPRIVATE(sv) |= SVp_POK)
256
79072805 257#define SvIOK(sv) (SvFLAGS(sv) & SVf_IOK)
463ee0b2 258#define SvIOK_on(sv) (SvOOK_off(sv), SvFLAGS(sv) |= (SVf_IOK|SVf_OK))
79072805 259#define SvIOK_off(sv) (SvFLAGS(sv) &= ~SVf_IOK)
463ee0b2 260#define SvIOK_only(sv) (SvOK_off(sv), SvFLAGS(sv) |= (SVf_IOK|SVf_OK))
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261
262#define SvNOK(sv) (SvFLAGS(sv) & SVf_NOK)
463ee0b2 263#define SvNOK_on(sv) (SvFLAGS(sv) |= (SVf_NOK|SVf_OK))
79072805 264#define SvNOK_off(sv) (SvFLAGS(sv) &= ~SVf_NOK)
463ee0b2 265#define SvNOK_only(sv) (SvOK_off(sv), SvFLAGS(sv) |= (SVf_NOK|SVf_OK))
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266
267#define SvPOK(sv) (SvFLAGS(sv) & SVf_POK)
463ee0b2 268#define SvPOK_on(sv) (SvFLAGS(sv) |= (SVf_POK|SVf_OK))
79072805 269#define SvPOK_off(sv) (SvFLAGS(sv) &= ~SVf_POK)
463ee0b2 270#define SvPOK_only(sv) (SvOK_off(sv), SvFLAGS(sv) |= (SVf_POK|SVf_OK))
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271
272#define SvOOK(sv) (SvFLAGS(sv) & SVf_OOK)
273#define SvOOK_on(sv) (SvIOK_off(sv), SvFLAGS(sv) |= SVf_OOK)
274#define SvOOK_off(sv) (SvOOK(sv) && sv_backoff(sv))
79072805 275
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276#define SvROK(sv) (SvFLAGS(sv) & SVf_ROK)
277#define SvROK_on(sv) (SvFLAGS(sv) |= SVf_ROK|SVf_THINKFIRST|SVf_OK)
278#define SvROK_off(sv) (SvFLAGS(sv) &= ~SVf_ROK)
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279
280#define SvMAGICAL(sv) (SvFLAGS(sv) & SVf_MAGICAL)
281#define SvMAGICAL_on(sv) (SvFLAGS(sv) |= SVf_MAGICAL)
282#define SvMAGICAL_off(sv) (SvFLAGS(sv) &= ~SVf_MAGICAL)
283
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284#define SvTHINKFIRST(sv) (SvFLAGS(sv) & SVf_THINKFIRST)
285#define SvTHINKFIRST_on(sv) (SvFLAGS(sv) |= SVf_THINKFIRST)
286#define SvTHINKFIRST_off(sv) (SvFLAGS(sv) &= ~SVf_THINKFIRST)
287
288#define SvPADBUSY(sv) (SvSTORAGE(sv) & SVs_PADBUSY)
289
290#define SvPADTMP(sv) (SvSTORAGE(sv) & SVs_PADTMP)
291#define SvPADTMP_on(sv) (SvSTORAGE(sv) |= SVs_PADTMP|SVs_PADBUSY)
292#define SvPADTMP_off(sv) (SvSTORAGE(sv) &= ~SVs_PADTMP)
293
294#define SvPADMY(sv) (SvSTORAGE(sv) & SVs_PADMY)
295#define SvPADMY_on(sv) (SvSTORAGE(sv) |= SVs_PADMY|SVs_PADBUSY)
296
297#define SvTEMP(sv) (SvSTORAGE(sv) & SVs_TEMP)
298#define SvTEMP_on(sv) (SvSTORAGE(sv) |= SVs_TEMP)
299#define SvTEMP_off(sv) (SvSTORAGE(sv) &= ~SVs_TEMP)
300
301#define SvOBJECT(sv) (SvSTORAGE(sv) & SVs_OBJECT)
302#define SvOBJECT_on(sv) (SvSTORAGE(sv) |= SVs_OBJECT)
303#define SvOBJECT_off(sv) (SvSTORAGE(sv) &= ~SVs_OBJECT)
304
305#define SvREADONLY(sv) (SvSTORAGE(sv) & SVs_READONLY)
306#define SvREADONLY_on(sv) (SvSTORAGE(sv) |= SVs_READONLY, \
307 SvTHINKFIRST_on(sv))
308#define SvREADONLY_off(sv) (SvSTORAGE(sv) &= ~SVs_READONLY)
309
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310#define SvSCREAM(sv) (SvPRIVATE(sv) & SVp_SCREAM)
311#define SvSCREAM_on(sv) (SvPRIVATE(sv) |= SVp_SCREAM)
312#define SvSCREAM_off(sv) (SvPRIVATE(sv) &= ~SVp_SCREAM)
79072805 313
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314#define SvCOMPILED(sv) (SvPRIVATE(sv) & SVpfm_COMPILED)
315#define SvCOMPILED_on(sv) (SvPRIVATE(sv) |= SVpfm_COMPILED)
316#define SvCOMPILED_off(sv) (SvPRIVATE(sv) &= ~SVpfm_COMPILED)
317
318#define SvTAIL(sv) (SvPRIVATE(sv) & SVpbm_TAIL)
319#define SvTAIL_on(sv) (SvPRIVATE(sv) |= SVpbm_TAIL)
320#define SvTAIL_off(sv) (SvPRIVATE(sv) &= ~SVpbm_TAIL)
321
322#define SvCASEFOLD(sv) (SvPRIVATE(sv) & SVpbm_CASEFOLD)
323#define SvCASEFOLD_on(sv) (SvPRIVATE(sv) |= SVpbm_CASEFOLD)
324#define SvCASEFOLD_off(sv) (SvPRIVATE(sv) &= ~SVpbm_CASEFOLD)
325
326#define SvVALID(sv) (SvPRIVATE(sv) & SVpbm_VALID)
327#define SvVALID_on(sv) (SvPRIVATE(sv) |= SVpbm_VALID)
328#define SvVALID_off(sv) (SvPRIVATE(sv) &= ~SVpbm_VALID)
329
330#define SvMULTI(sv) (SvPRIVATE(sv) & SVpgv_MULTI)
331#define SvMULTI_on(sv) (SvPRIVATE(sv) |= SVpgv_MULTI)
332#define SvMULTI_off(sv) (SvPRIVATE(sv) &= ~SVpgv_MULTI)
333
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334#define SvRV(sv) ((XRV*) SvANY(sv))->xrv_rv
335#define SvRVx(sv) SvRV(sv)
336
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337#define SvIVX(sv) ((XPVIV*) SvANY(sv))->xiv_iv
338#define SvIVXx(sv) SvIVX(sv)
339#define SvNVX(sv) ((XPVNV*)SvANY(sv))->xnv_nv
340#define SvNVXx(sv) SvNVX(sv)
341#define SvPVX(sv) ((XPV*) SvANY(sv))->xpv_pv
342#define SvPVXx(sv) SvPVX(sv)
79072805 343#define SvCUR(sv) ((XPV*) SvANY(sv))->xpv_cur
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344#define SvLEN(sv) ((XPV*) SvANY(sv))->xpv_len
345#define SvLENx(sv) SvLEN(sv)
346#define SvEND(sv)(((XPV*) SvANY(sv))->xpv_pv + ((XPV*)SvANY(sv))->xpv_cur)
347#define SvENDx(sv) ((Sv = sv), SvEND(Sv))
348#define SvMAGIC(sv) ((XPVMG*) SvANY(sv))->xmg_magic
349#define SvSTASH(sv) ((XPVMG*) SvANY(sv))->xmg_stash
350
351#define SvIV_set(sv, val) \
352 do { assert(SvTYPE(sv) == SVt_IV || SvTYPE(sv) >= SVt_PVIV); \
353 (((XPVIV*) SvANY(sv))->xiv_iv = val); } while (0)
354#define SvNV_set(sv, val) \
355 do { assert(SvTYPE(sv) == SVt_NV || SvTYPE(sv) >= SVt_PVNV); \
356 (((XPVNV*) SvANY(sv))->xnv_nv = val); } while (0)
357#define SvPV_set(sv, val) \
358 do { assert(SvTYPE(sv) >= SVt_PV); \
359 (((XPV*) SvANY(sv))->xpv_pv = val); } while (0)
360#define SvCUR_set(sv, val) \
361 do { assert(SvTYPE(sv) >= SVt_PV); \
362 (((XPV*) SvANY(sv))->xpv_cur = val); } while (0)
363#define SvLEN_set(sv, val) \
364 do { assert(SvTYPE(sv) >= SVt_PV); \
365 (((XPV*) SvANY(sv))->xpv_len = val); } while (0)
366#define SvEND_set(sv, val) \
367 do { assert(SvTYPE(sv) >= SVt_PV); \
463ee0b2 368 (((XPV*) SvANY(sv))->xpv_cur = val - SvPVX(sv)); } while (0)
79072805 369
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370#define SvCUROK(sv) (SvPOK(sv) ? SvCUR(sv) : 0)
371
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372#define BmRARE(sv) ((XPVBM*) SvANY(sv))->xbm_rare
373#define BmUSEFUL(sv) ((XPVBM*) SvANY(sv))->xbm_useful
374#define BmPREVIOUS(sv) ((XPVBM*) SvANY(sv))->xbm_previous
375
376#define FmLINES(sv) ((XPVFM*) SvANY(sv))->xfm_lines
377
378#define LvTYPE(sv) ((XPVLV*) SvANY(sv))->xlv_type
379#define LvTARG(sv) ((XPVLV*) SvANY(sv))->xlv_targ
380#define LvTARGOFF(sv) ((XPVLV*) SvANY(sv))->xlv_targoff
381#define LvTARGLEN(sv) ((XPVLV*) SvANY(sv))->xlv_targlen
382
463ee0b2 383#define SvTAINT(sv) if (tainting && tainted) sv_magic(sv, 0, 't', 0, 0)
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384
385#ifdef CRIPPLED_CC
386
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387double SvIV();
388double SvNV();
389#define SvPV(sv, lp) sv_pvn(sv, &lp)
390char *sv_pvn();
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391I32 SvTRUE();
392
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393#define SvIVx(sv) SvIV(sv)
394#define SvNVx(sv) SvNV(sv)
395#define SvPVx(sv, lp) sv_pvn(sv, &lp)
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396#define SvTRUEx(sv) SvTRUE(sv)
397
398#else /* !CRIPPLED_CC */
399
463ee0b2 400#define SvIV(sv) (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv))
79072805 401
463ee0b2 402#define SvNV(sv) (SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv))
79072805 403
463ee0b2 404#define SvPV(sv, lp) (SvPOK(sv) ? ((lp = SvCUR(sv)), SvPVX(sv)) : sv_2pv(sv, &lp))
79072805 405
463ee0b2 406#define SvTRUE(sv) ( \
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407 SvPOK(sv) \
408 ? ((Xpv = (XPV*)SvANY(sv)) && \
409 (*Xpv->xpv_pv > '0' || \
410 Xpv->xpv_cur > 1 || \
411 (Xpv->xpv_cur && *Xpv->xpv_pv != '0')) \
412 ? 1 \
413 : 0) \
414 : \
415 SvIOK(sv) \
463ee0b2 416 ? SvIVX(sv) != 0 \
79072805 417 : SvNOK(sv) \
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418 ? SvNVX(sv) != 0.0 \
419 : sv_2bool(sv) )
79072805 420
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421#define SvIVx(sv) ((Sv = sv), SvIV(Sv))
422#define SvNVx(sv) ((Sv = sv), SvNV(Sv))
423#define SvPVx(sv, lp) ((Sv = sv), SvPV(Sv, lp))
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424#define SvTRUEx(sv) ((Sv = sv), SvTRUE(Sv))
425
426#endif /* CRIPPLED_CC */
427
428/* the following macro updates any magic values this sv is associated with */
429
463ee0b2 430#define SvSETMAGIC(x) if (SvMAGICAL(x)) mg_set(x)
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431
432#define SvSetSV(dst,src) if (dst != src) sv_setsv(dst,src)
433
434#define SvPEEK(sv) sv_peek(sv)
435
436#define isGV(sv) (SvTYPE(sv) == SVt_PVGV)
437
438#define GROWSTR(pp,lp,len) if (*(lp) < (len)) pv_grow(pp, lp, (len) * 3 / 2)
439
440#ifndef DOSISH
441# define SvGROW(sv,len) if (SvLEN(sv) < (len)) sv_grow(sv,len)
442# define Sv_Grow sv_grow
443#else
444 /* extra parentheses intentionally NOT placed around "len"! */
445# define SvGROW(sv,len) if (SvLEN(sv) < (unsigned long)len) \
446 sv_grow(sv,(unsigned long)len)
447# define Sv_Grow(sv,len) sv_grow(sv,(unsigned long)(len))
448#endif /* DOSISH */