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25468daa FC |
1 | /* inline.h |
2 | * | |
3 | * Copyright (C) 2012 by Larry Wall and others | |
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 | * This file is a home for static inline functions that cannot go in other | |
9 | * headers files, because they depend on proto.h (included after most other | |
10 | * headers) or struct definitions. | |
11 | * | |
12 | * Each section names the header file that the functions "belong" to. | |
13 | */ | |
27669aa4 | 14 | |
be3a7a5d KW |
15 | /* ------------------------------- av.h ------------------------------- */ |
16 | ||
c70927a6 | 17 | PERL_STATIC_INLINE SSize_t |
be3a7a5d KW |
18 | S_av_top_index(pTHX_ AV *av) |
19 | { | |
20 | PERL_ARGS_ASSERT_AV_TOP_INDEX; | |
21 | assert(SvTYPE(av) == SVt_PVAV); | |
22 | ||
23 | return AvFILL(av); | |
24 | } | |
25 | ||
1afe1db1 FC |
26 | /* ------------------------------- cv.h ------------------------------- */ |
27 | ||
ae77754a FC |
28 | PERL_STATIC_INLINE GV * |
29 | S_CvGV(pTHX_ CV *sv) | |
30 | { | |
31 | return CvNAMED(sv) | |
32 | ? Perl_cvgv_from_hek(aTHX_ sv) | |
33 | : ((XPVCV*)MUTABLE_PTR(SvANY(sv)))->xcv_gv_u.xcv_gv; | |
34 | } | |
35 | ||
1afe1db1 FC |
36 | PERL_STATIC_INLINE I32 * |
37 | S_CvDEPTHp(const CV * const sv) | |
38 | { | |
39 | assert(SvTYPE(sv) == SVt_PVCV || SvTYPE(sv) == SVt_PVFM); | |
8de47657 | 40 | return &((XPVCV*)SvANY(sv))->xcv_depth; |
1afe1db1 FC |
41 | } |
42 | ||
d16269d8 PM |
43 | /* |
44 | CvPROTO returns the prototype as stored, which is not necessarily what | |
45 | the interpreter should be using. Specifically, the interpreter assumes | |
46 | that spaces have been stripped, which has been the case if the prototype | |
47 | was added by toke.c, but is generally not the case if it was added elsewhere. | |
48 | Since we can't enforce the spacelessness at assignment time, this routine | |
49 | provides a temporary copy at parse time with spaces removed. | |
50 | I<orig> is the start of the original buffer, I<len> is the length of the | |
51 | prototype and will be updated when this returns. | |
52 | */ | |
53 | ||
5b67adb8 | 54 | #ifdef PERL_CORE |
d16269d8 PM |
55 | PERL_STATIC_INLINE char * |
56 | S_strip_spaces(pTHX_ const char * orig, STRLEN * const len) | |
57 | { | |
58 | SV * tmpsv; | |
59 | char * tmps; | |
60 | tmpsv = newSVpvn_flags(orig, *len, SVs_TEMP); | |
61 | tmps = SvPVX(tmpsv); | |
62 | while ((*len)--) { | |
63 | if (!isSPACE(*orig)) | |
64 | *tmps++ = *orig; | |
65 | orig++; | |
66 | } | |
67 | *tmps = '\0'; | |
68 | *len = tmps - SvPVX(tmpsv); | |
69 | return SvPVX(tmpsv); | |
70 | } | |
5b67adb8 | 71 | #endif |
d16269d8 | 72 | |
25fdce4a FC |
73 | /* ------------------------------- mg.h ------------------------------- */ |
74 | ||
75 | #if defined(PERL_CORE) || defined(PERL_EXT) | |
76 | /* assumes get-magic and stringification have already occurred */ | |
77 | PERL_STATIC_INLINE STRLEN | |
78 | S_MgBYTEPOS(pTHX_ MAGIC *mg, SV *sv, const char *s, STRLEN len) | |
79 | { | |
80 | assert(mg->mg_type == PERL_MAGIC_regex_global); | |
81 | assert(mg->mg_len != -1); | |
82 | if (mg->mg_flags & MGf_BYTES || !DO_UTF8(sv)) | |
83 | return (STRLEN)mg->mg_len; | |
84 | else { | |
85 | const STRLEN pos = (STRLEN)mg->mg_len; | |
86 | /* Without this check, we may read past the end of the buffer: */ | |
87 | if (pos > sv_or_pv_len_utf8(sv, s, len)) return len+1; | |
88 | return sv_or_pv_pos_u2b(sv, s, pos, NULL); | |
89 | } | |
90 | } | |
91 | #endif | |
92 | ||
8d919b0a FC |
93 | /* ----------------------------- regexp.h ----------------------------- */ |
94 | ||
95 | PERL_STATIC_INLINE struct regexp * | |
96 | S_ReANY(const REGEXP * const re) | |
97 | { | |
98 | assert(isREGEXP(re)); | |
99 | return re->sv_u.svu_rx; | |
100 | } | |
101 | ||
27669aa4 FC |
102 | /* ------------------------------- sv.h ------------------------------- */ |
103 | ||
104 | PERL_STATIC_INLINE SV * | |
105 | S_SvREFCNT_inc(SV *sv) | |
106 | { | |
2439e033 | 107 | if (LIKELY(sv != NULL)) |
27669aa4 FC |
108 | SvREFCNT(sv)++; |
109 | return sv; | |
110 | } | |
111 | PERL_STATIC_INLINE SV * | |
112 | S_SvREFCNT_inc_NN(SV *sv) | |
113 | { | |
114 | SvREFCNT(sv)++; | |
115 | return sv; | |
116 | } | |
117 | PERL_STATIC_INLINE void | |
118 | S_SvREFCNT_inc_void(SV *sv) | |
119 | { | |
2439e033 | 120 | if (LIKELY(sv != NULL)) |
27669aa4 FC |
121 | SvREFCNT(sv)++; |
122 | } | |
75e16a44 FC |
123 | PERL_STATIC_INLINE void |
124 | S_SvREFCNT_dec(pTHX_ SV *sv) | |
125 | { | |
2439e033 | 126 | if (LIKELY(sv != NULL)) { |
75a9bf96 | 127 | U32 rc = SvREFCNT(sv); |
79e2a32a | 128 | if (LIKELY(rc > 1)) |
75a9bf96 DM |
129 | SvREFCNT(sv) = rc - 1; |
130 | else | |
131 | Perl_sv_free2(aTHX_ sv, rc); | |
75e16a44 FC |
132 | } |
133 | } | |
541377b1 FC |
134 | |
135 | PERL_STATIC_INLINE void | |
4a9a56a7 DM |
136 | S_SvREFCNT_dec_NN(pTHX_ SV *sv) |
137 | { | |
138 | U32 rc = SvREFCNT(sv); | |
79e2a32a | 139 | if (LIKELY(rc > 1)) |
4a9a56a7 DM |
140 | SvREFCNT(sv) = rc - 1; |
141 | else | |
142 | Perl_sv_free2(aTHX_ sv, rc); | |
143 | } | |
144 | ||
145 | PERL_STATIC_INLINE void | |
541377b1 FC |
146 | SvAMAGIC_on(SV *sv) |
147 | { | |
148 | assert(SvROK(sv)); | |
149 | if (SvOBJECT(SvRV(sv))) HvAMAGIC_on(SvSTASH(SvRV(sv))); | |
150 | } | |
151 | PERL_STATIC_INLINE void | |
152 | SvAMAGIC_off(SV *sv) | |
153 | { | |
154 | if (SvROK(sv) && SvOBJECT(SvRV(sv))) | |
155 | HvAMAGIC_off(SvSTASH(SvRV(sv))); | |
156 | } | |
157 | ||
158 | PERL_STATIC_INLINE U32 | |
541377b1 FC |
159 | S_SvPADSTALE_on(SV *sv) |
160 | { | |
c0683843 | 161 | assert(!(SvFLAGS(sv) & SVs_PADTMP)); |
541377b1 FC |
162 | return SvFLAGS(sv) |= SVs_PADSTALE; |
163 | } | |
164 | PERL_STATIC_INLINE U32 | |
165 | S_SvPADSTALE_off(SV *sv) | |
166 | { | |
c0683843 | 167 | assert(!(SvFLAGS(sv) & SVs_PADTMP)); |
541377b1 FC |
168 | return SvFLAGS(sv) &= ~SVs_PADSTALE; |
169 | } | |
25fdce4a | 170 | #if defined(PERL_CORE) || defined (PERL_EXT) |
4ddea69a | 171 | PERL_STATIC_INLINE STRLEN |
6964422a | 172 | S_sv_or_pv_pos_u2b(pTHX_ SV *sv, const char *pv, STRLEN pos, STRLEN *lenp) |
4ddea69a | 173 | { |
25fdce4a | 174 | PERL_ARGS_ASSERT_SV_OR_PV_POS_U2B; |
4ddea69a FC |
175 | if (SvGAMAGIC(sv)) { |
176 | U8 *hopped = utf8_hop((U8 *)pv, pos); | |
177 | if (lenp) *lenp = (STRLEN)(utf8_hop(hopped, *lenp) - hopped); | |
178 | return (STRLEN)(hopped - (U8 *)pv); | |
179 | } | |
180 | return sv_pos_u2b_flags(sv,pos,lenp,SV_CONST_RETURN); | |
181 | } | |
182 | #endif | |
f019c49e | 183 | |
d1decf2b TC |
184 | /* ------------------------------- handy.h ------------------------------- */ |
185 | ||
186 | /* saves machine code for a common noreturn idiom typically used in Newx*() */ | |
c1d6452f | 187 | #ifdef GCC_DIAG_PRAGMA |
6ab56f1e | 188 | GCC_DIAG_IGNORE(-Wunused-function) /* Intentionally left semicolonless. */ |
c1d6452f | 189 | #endif |
d1decf2b TC |
190 | static void |
191 | S_croak_memory_wrap(void) | |
192 | { | |
193 | Perl_croak_nocontext("%s",PL_memory_wrap); | |
194 | } | |
c1d6452f | 195 | #ifdef GCC_DIAG_PRAGMA |
6ab56f1e | 196 | GCC_DIAG_RESTORE /* Intentionally left semicolonless. */ |
c1d6452f | 197 | #endif |
d1decf2b | 198 | |
a8a2ceaa KW |
199 | /* ------------------------------- utf8.h ------------------------------- */ |
200 | ||
55d09dc8 KW |
201 | PERL_STATIC_INLINE void |
202 | S_append_utf8_from_native_byte(const U8 byte, U8** dest) | |
203 | { | |
204 | /* Takes an input 'byte' (Latin1 or EBCDIC) and appends it to the UTF-8 | |
205 | * encoded string at '*dest', updating '*dest' to include it */ | |
206 | ||
55d09dc8 KW |
207 | PERL_ARGS_ASSERT_APPEND_UTF8_FROM_NATIVE_BYTE; |
208 | ||
6f2d5cbc | 209 | if (NATIVE_BYTE_IS_INVARIANT(byte)) |
9ff651ce | 210 | *(*dest)++ = byte; |
55d09dc8 | 211 | else { |
9ff651ce KW |
212 | *(*dest)++ = UTF8_EIGHT_BIT_HI(byte); |
213 | *(*dest)++ = UTF8_EIGHT_BIT_LO(byte); | |
55d09dc8 KW |
214 | } |
215 | } | |
216 | ||
e123187a | 217 | /* |
f2645549 | 218 | |
6302f837 KW |
219 | A helper function for the macro isUTF8_CHAR(), which should be used instead of |
220 | this function. The macro will handle smaller code points directly saving time, | |
221 | using this function as a fall-back for higher code points. | |
f2645549 | 222 | |
6302f837 KW |
223 | Tests if the first bytes of string C<s> form a valid UTF-8 character. 0 is |
224 | returned if the bytes starting at C<s> up to but not including C<e> do not form a | |
225 | complete well-formed UTF-8 character; otherwise the number of bytes in the | |
226 | character is returned. | |
f2645549 | 227 | |
6302f837 KW |
228 | Note that an INVARIANT (i.e. ASCII on non-EBCDIC) character is a valid UTF-8 |
229 | character. | |
e123187a KW |
230 | |
231 | =cut */ | |
232 | PERL_STATIC_INLINE STRLEN | |
6302f837 | 233 | S__is_utf8_char_slow(const U8 *s, const U8 *e) |
e123187a KW |
234 | { |
235 | dTHX; /* The function called below requires thread context */ | |
236 | ||
237 | STRLEN actual_len; | |
238 | ||
239 | PERL_ARGS_ASSERT__IS_UTF8_CHAR_SLOW; | |
240 | ||
6302f837 KW |
241 | assert(e >= s); |
242 | utf8n_to_uvchr(s, e - s, &actual_len, UTF8_CHECK_ONLY); | |
e123187a KW |
243 | |
244 | return (actual_len == (STRLEN) -1) ? 0 : actual_len; | |
245 | } | |
246 | ||
c8028aa6 TC |
247 | /* ------------------------------- perl.h ----------------------------- */ |
248 | ||
249 | /* | |
dcccc8ff KW |
250 | =head1 Miscellaneous Functions |
251 | ||
41188aa0 | 252 | =for apidoc AiR|bool|is_safe_syscall|const char *pv|STRLEN len|const char *what|const char *op_name |
c8028aa6 | 253 | |
6602b933 | 254 | Test that the given C<pv> doesn't contain any internal C<NUL> characters. |
c8028aa6 TC |
255 | If it does, set C<errno> to ENOENT, optionally warn, and return FALSE. |
256 | ||
257 | Return TRUE if the name is safe. | |
258 | ||
259 | Used by the IS_SAFE_SYSCALL() macro. | |
260 | ||
261 | =cut | |
262 | */ | |
263 | ||
264 | PERL_STATIC_INLINE bool | |
41188aa0 | 265 | S_is_safe_syscall(pTHX_ const char *pv, STRLEN len, const char *what, const char *op_name) { |
c8028aa6 TC |
266 | /* While the Windows CE API provides only UCS-16 (or UTF-16) APIs |
267 | * perl itself uses xce*() functions which accept 8-bit strings. | |
268 | */ | |
269 | ||
270 | PERL_ARGS_ASSERT_IS_SAFE_SYSCALL; | |
271 | ||
41188aa0 | 272 | if (pv && len > 1) { |
c8028aa6 | 273 | char *null_at; |
41188aa0 | 274 | if (UNLIKELY((null_at = (char *)memchr(pv, 0, len-1)) != NULL)) { |
c8028aa6 | 275 | SETERRNO(ENOENT, LIB_INVARG); |
1d505182 | 276 | Perl_ck_warner(aTHX_ packWARN(WARN_SYSCALLS), |
c8028aa6 | 277 | "Invalid \\0 character in %s for %s: %s\\0%s", |
41188aa0 | 278 | what, op_name, pv, null_at+1); |
c8028aa6 TC |
279 | return FALSE; |
280 | } | |
281 | } | |
282 | ||
283 | return TRUE; | |
284 | } | |
285 | ||
286 | /* | |
7cb3f959 TC |
287 | |
288 | Return true if the supplied filename has a newline character | |
289 | immediately before the final NUL. | |
290 | ||
291 | My original look at this incorrectly used the len from SvPV(), but | |
292 | that's incorrect, since we allow for a NUL in pv[len-1]. | |
293 | ||
294 | So instead, strlen() and work from there. | |
295 | ||
296 | This allow for the user reading a filename, forgetting to chomp it, | |
297 | then calling: | |
298 | ||
299 | open my $foo, "$file\0"; | |
300 | ||
301 | */ | |
302 | ||
303 | #ifdef PERL_CORE | |
304 | ||
305 | PERL_STATIC_INLINE bool | |
306 | S_should_warn_nl(const char *pv) { | |
307 | STRLEN len; | |
308 | ||
309 | PERL_ARGS_ASSERT_SHOULD_WARN_NL; | |
310 | ||
311 | len = strlen(pv); | |
312 | ||
313 | return len > 0 && pv[len-1] == '\n'; | |
314 | } | |
315 | ||
316 | #endif | |
317 | ||
81d52ecd JH |
318 | /* ------------------ pp.c, regcomp.c, toke.c, universal.c ------------ */ |
319 | ||
320 | #define MAX_CHARSET_NAME_LENGTH 2 | |
321 | ||
322 | PERL_STATIC_INLINE const char * | |
323 | get_regex_charset_name(const U32 flags, STRLEN* const lenp) | |
324 | { | |
325 | /* Returns a string that corresponds to the name of the regex character set | |
326 | * given by 'flags', and *lenp is set the length of that string, which | |
327 | * cannot exceed MAX_CHARSET_NAME_LENGTH characters */ | |
328 | ||
329 | *lenp = 1; | |
330 | switch (get_regex_charset(flags)) { | |
331 | case REGEX_DEPENDS_CHARSET: return DEPENDS_PAT_MODS; | |
332 | case REGEX_LOCALE_CHARSET: return LOCALE_PAT_MODS; | |
333 | case REGEX_UNICODE_CHARSET: return UNICODE_PAT_MODS; | |
334 | case REGEX_ASCII_RESTRICTED_CHARSET: return ASCII_RESTRICT_PAT_MODS; | |
335 | case REGEX_ASCII_MORE_RESTRICTED_CHARSET: | |
336 | *lenp = 2; | |
337 | return ASCII_MORE_RESTRICT_PAT_MODS; | |
338 | } | |
339 | /* The NOT_REACHED; hides an assert() which has a rather complex | |
340 | * definition in perl.h. */ | |
341 | NOT_REACHED; /* NOTREACHED */ | |
342 | return "?"; /* Unknown */ | |
343 | } | |
344 | ||
7cb3f959 | 345 | /* |
c8028aa6 TC |
346 | * Local variables: |
347 | * c-indentation-style: bsd | |
348 | * c-basic-offset: 4 | |
349 | * indent-tabs-mode: nil | |
350 | * End: | |
351 | * | |
352 | * ex: set ts=8 sts=4 sw=4 et: | |
353 | */ |