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|---|
| e807ee50 |
1 | /* stolen_chunk_of_toke.c - from perl 5.8.8 toke.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others |
| 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 | |
| 11 | /* |
| 12 | * "It all comes from here, the stench and the peril." --Frodo |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * this is all blatantly stolen. I sincerely hopes it doesn't fuck anything |
| 17 | * up but if it does blame me (Matt S Trout), not the poor original authors |
| 18 | */ |
| 19 | |
| 71511651 |
20 | /* the following #defines are stolen from assorted headers, not toke.c (mst) */ |
| e807ee50 |
21 | |
| 22 | #define DPTR2FPTR(t,p) ((t)PTR2nat(p)) /* data pointer to function pointer */ |
| 23 | #define FPTR2DPTR(t,p) ((t)PTR2nat(p)) /* function pointer to data pointer */ |
| c630715a |
24 | #define PTR2nat(p) (PTRV)(p) /* pointer to integer of PTRSIZE */ |
| e807ee50 |
25 | #define MEM_WRAP_CHECK_(n,t) MEM_WRAP_CHECK(n,t), |
| 14ab3472 |
26 | |
| 27 | /* conditionalise these two because as of 5.9.5 we already get them from |
| 28 | the headers (mst) */ |
| 29 | #ifndef Newx |
| e807ee50 |
30 | #define Newx(v,n,t) (v = (MEM_WRAP_CHECK_(n,t) (t*)safemalloc((MEM_SIZE)((n)*sizeof(t))))) |
| 14ab3472 |
31 | #endif |
| 32 | #ifndef SvPVX_const |
| 0ba8c7aa |
33 | #define SvPVX_const(sv) ((const char*) (0 + SvPVX(sv))) |
| 14ab3472 |
34 | #endif |
| 35 | |
| 0ba8c7aa |
36 | #define SvPV_renew(sv,n) \ |
| 37 | STMT_START { SvLEN_set(sv, n); \ |
| 38 | SvPV_set((sv), (MEM_WRAP_CHECK_(n,char) \ |
| 39 | (char*)saferealloc((Malloc_t)SvPVX(sv), \ |
| 40 | (MEM_SIZE)((n))))); \ |
| 41 | } STMT_END |
| e807ee50 |
42 | |
| c630715a |
43 | /* On MacOS, respect nonbreaking spaces */ |
| 44 | #ifdef MACOS_TRADITIONAL |
| 45 | #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\312'||(c)=='\t') |
| 46 | #else |
| 47 | #define SPACE_OR_TAB(c) ((c)==' '||(c)=='\t') |
| 48 | #endif |
| e807ee50 |
49 | |
| 0ba8c7aa |
50 | #define CLINE (PL_copline = (CopLINE(PL_curcop) < PL_copline ? CopLINE(PL_curcop) : PL_copline)) |
| 51 | |
| e807ee50 |
52 | #define LEX_NORMAL 10 /* normal code (ie not within "...") */ |
| 53 | #define LEX_INTERPNORMAL 9 /* code within a string, eg "$foo[$x+1]" */ |
| 54 | #define LEX_INTERPCASEMOD 8 /* expecting a \U, \Q or \E etc */ |
| 55 | #define LEX_INTERPPUSH 7 /* starting a new sublex parse level */ |
| 56 | #define LEX_INTERPSTART 6 /* expecting the start of a $var */ |
| 57 | |
| 58 | /* at end of code, eg "$x" followed by: */ |
| 59 | #define LEX_INTERPEND 5 /* ... eg not one of [, { or -> */ |
| 60 | #define LEX_INTERPENDMAYBE 4 /* ... eg one of [, { or -> */ |
| 61 | |
| 62 | #define LEX_INTERPCONCAT 3 /* expecting anything, eg at start of |
| 63 | string or after \E, $foo, etc */ |
| 64 | #define LEX_INTERPCONST 2 /* NOT USED */ |
| 65 | #define LEX_FORMLINE 1 /* expecting a format line */ |
| 66 | #define LEX_KNOWNEXT 0 /* next token known; just return it */ |
| 67 | |
| 14ab3472 |
68 | /* and these two are my own madness (mst) */ |
| 71511651 |
69 | |
| 70 | #if PERL_REVISION == 5 && PERL_VERSION == 8 && PERL_SUBVERSION >= 8 |
| 71 | #define PERL_5_8_8_PLUS |
| 72 | #endif |
| 73 | |
| 14ab3472 |
74 | #if PERL_REVISION == 5 && PERL_VERSION > 8 |
| 75 | #define PERL_5_9_PLUS |
| 76 | #endif |
| 77 | |
| 78 | #ifdef PERL_5_9_PLUS |
| 79 | /* 5.9+ moves a bunch of things to a PL_parser struct so we need to |
| 80 | declare the backcompat macros for things to still work (mst) */ |
| 81 | |
| 82 | /* XXX temporary backwards compatibility */ |
| 83 | #define PL_lex_brackets (PL_parser->lex_brackets) |
| 84 | #define PL_lex_brackstack (PL_parser->lex_brackstack) |
| 85 | #define PL_lex_casemods (PL_parser->lex_casemods) |
| 86 | #define PL_lex_casestack (PL_parser->lex_casestack) |
| 87 | #define PL_lex_defer (PL_parser->lex_defer) |
| 88 | #define PL_lex_dojoin (PL_parser->lex_dojoin) |
| 89 | #define PL_lex_expect (PL_parser->lex_expect) |
| 90 | #define PL_lex_formbrack (PL_parser->lex_formbrack) |
| 91 | #define PL_lex_inpat (PL_parser->lex_inpat) |
| 92 | #define PL_lex_inwhat (PL_parser->lex_inwhat) |
| 93 | #define PL_lex_op (PL_parser->lex_op) |
| 94 | #define PL_lex_repl (PL_parser->lex_repl) |
| 95 | #define PL_lex_starts (PL_parser->lex_starts) |
| 96 | #define PL_lex_stuff (PL_parser->lex_stuff) |
| 97 | #define PL_multi_start (PL_parser->multi_start) |
| 98 | #define PL_multi_open (PL_parser->multi_open) |
| 99 | #define PL_multi_close (PL_parser->multi_close) |
| 100 | #define PL_pending_ident (PL_parser->pending_ident) |
| 101 | #define PL_preambled (PL_parser->preambled) |
| 102 | #define PL_sublex_info (PL_parser->sublex_info) |
| 103 | #define PL_linestr (PL_parser->linestr) |
| 104 | #define PL_sublex_info (PL_parser->sublex_info) |
| 105 | #define PL_linestr (PL_parser->linestr) |
| 106 | #define PL_expect (PL_parser->expect) |
| 107 | #define PL_copline (PL_parser->copline) |
| 108 | #define PL_bufptr (PL_parser->bufptr) |
| 109 | #define PL_oldbufptr (PL_parser->oldbufptr) |
| 110 | #define PL_oldoldbufptr (PL_parser->oldoldbufptr) |
| 111 | #define PL_linestart (PL_parser->linestart) |
| 112 | #define PL_bufend (PL_parser->bufend) |
| 113 | #define PL_last_uni (PL_parser->last_uni) |
| 114 | #define PL_last_lop (PL_parser->last_lop) |
| 115 | #define PL_last_lop_op (PL_parser->last_lop_op) |
| 116 | #define PL_lex_state (PL_parser->lex_state) |
| 117 | #define PL_rsfp (PL_parser->rsfp) |
| 118 | #define PL_rsfp_filters (PL_parser->rsfp_filters) |
| 119 | #define PL_in_my (PL_parser->in_my) |
| 120 | #define PL_in_my_stash (PL_parser->in_my_stash) |
| 121 | #define PL_tokenbuf (PL_parser->tokenbuf) |
| 122 | #define PL_multi_end (PL_parser->multi_end) |
| 123 | #define PL_error_count (PL_parser->error_count) |
| 124 | /* these three are from the non-PERL_MAD path but I don't -think- I need |
| 125 | the PERL_MAD stuff since my code isn't really populating things (mst) */ |
| 126 | # define PL_nexttoke (PL_parser->nexttoke) |
| 127 | # define PL_nexttype (PL_parser->nexttype) |
| 128 | # define PL_nextval (PL_parser->nextval) |
| 129 | /* end of backcompat macros form 5.9 toke.c (mst) */ |
| 130 | /* we also need this because we define PERL_CORE so handy.h doesn't provide |
| 131 | it for us (mst) */ |
| 132 | #define NEWSV(x,len) newSV(len) |
| 133 | #endif |
| 134 | |
| 135 | /* when ccflags include -DDEBUGGING we need this for earlier 5.8 perls */ |
| 136 | #ifndef SvPV_nolen_const |
| 137 | #define SvPV_nolen_const SvPV_nolen |
| 138 | #endif |
| 139 | |
| 71511651 |
140 | /* and now we're back to the toke.c stuff again (mst) */ |
| 141 | |
| e807ee50 |
142 | static const char ident_too_long[] = |
| 143 | "Identifier too long"; |
| 144 | static const char c_without_g[] = |
| 145 | "Use of /c modifier is meaningless without /g"; |
| 146 | static const char c_in_subst[] = |
| 147 | "Use of /c modifier is meaningless in s///"; |
| 148 | |
| 149 | #ifdef USE_UTF8_SCRIPTS |
| 150 | # define UTF (!IN_BYTES) |
| 151 | #else |
| 152 | # define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8)) |
| 153 | #endif |
| 154 | |
| 155 | /* Invoke the idxth filter function for the current rsfp. */ |
| 156 | /* maxlen 0 = read one text line */ |
| 157 | I32 |
| 158 | Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen) |
| 159 | { |
| 160 | filter_t funcp; |
| 161 | SV *datasv = NULL; |
| 162 | |
| 163 | if (!PL_rsfp_filters) |
| 164 | return -1; |
| 165 | if (idx > AvFILLp(PL_rsfp_filters)) { /* Any more filters? */ |
| 166 | /* Provide a default input filter to make life easy. */ |
| 167 | /* Note that we append to the line. This is handy. */ |
| 168 | DEBUG_P(PerlIO_printf(Perl_debug_log, |
| 169 | "filter_read %d: from rsfp\n", idx)); |
| 170 | if (maxlen) { |
| 171 | /* Want a block */ |
| 172 | int len ; |
| 173 | const int old_len = SvCUR(buf_sv); |
| 174 | |
| 175 | /* ensure buf_sv is large enough */ |
| 176 | SvGROW(buf_sv, (STRLEN)(old_len + maxlen)) ; |
| 177 | if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){ |
| 178 | if (PerlIO_error(PL_rsfp)) |
| 179 | return -1; /* error */ |
| 180 | else |
| 181 | return 0 ; /* end of file */ |
| 182 | } |
| 183 | SvCUR_set(buf_sv, old_len + len) ; |
| 184 | } else { |
| 185 | /* Want a line */ |
| 186 | if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) { |
| 187 | if (PerlIO_error(PL_rsfp)) |
| 188 | return -1; /* error */ |
| 189 | else |
| 190 | return 0 ; /* end of file */ |
| 191 | } |
| 192 | } |
| 193 | return SvCUR(buf_sv); |
| 194 | } |
| 195 | /* Skip this filter slot if filter has been deleted */ |
| 196 | if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef) { |
| 197 | DEBUG_P(PerlIO_printf(Perl_debug_log, |
| 198 | "filter_read %d: skipped (filter deleted)\n", |
| 199 | idx)); |
| 200 | return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */ |
| 201 | } |
| 202 | /* Get function pointer hidden within datasv */ |
| 203 | funcp = DPTR2FPTR(filter_t, IoANY(datasv)); |
| 204 | DEBUG_P(PerlIO_printf(Perl_debug_log, |
| 205 | "filter_read %d: via function %p (%s)\n", |
| 206 | idx, datasv, SvPV_nolen_const(datasv))); |
| 207 | /* Call function. The function is expected to */ |
| 208 | /* call "FILTER_READ(idx+1, buf_sv)" first. */ |
| 209 | /* Return: <0:error, =0:eof, >0:not eof */ |
| 210 | return (*funcp)(aTHX_ idx, buf_sv, maxlen); |
| 211 | } |
| 212 | |
| 213 | STATIC char * |
| 214 | S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append) |
| 215 | { |
| 216 | #ifdef PERL_CR_FILTER |
| 217 | if (!PL_rsfp_filters) { |
| 218 | filter_add(S_cr_textfilter,NULL); |
| 219 | } |
| 220 | #endif |
| 221 | if (PL_rsfp_filters) { |
| 222 | if (!append) |
| 223 | SvCUR_set(sv, 0); /* start with empty line */ |
| 224 | if (FILTER_READ(0, sv, 0) > 0) |
| 225 | return ( SvPVX(sv) ) ; |
| 226 | else |
| 227 | return Nullch ; |
| 228 | } |
| 229 | else |
| 230 | return (sv_gets(sv, fp, append)); |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * S_skipspace |
| 235 | * Called to gobble the appropriate amount and type of whitespace. |
| 236 | * Skips comments as well. |
| 237 | */ |
| 238 | |
| 239 | STATIC char * |
| 240 | S_skipspace(pTHX_ register char *s) |
| 241 | { |
| 242 | if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) { |
| 243 | while (s < PL_bufend && SPACE_OR_TAB(*s)) |
| 244 | s++; |
| 245 | return s; |
| 246 | } |
| 247 | for (;;) { |
| 248 | STRLEN prevlen; |
| 249 | SSize_t oldprevlen, oldoldprevlen; |
| 250 | SSize_t oldloplen = 0, oldunilen = 0; |
| 251 | while (s < PL_bufend && isSPACE(*s)) { |
| 252 | if (*s++ == '\n' && PL_in_eval && !PL_rsfp) |
| 253 | incline(s); |
| 254 | } |
| 255 | |
| 256 | /* comment */ |
| 257 | if (s < PL_bufend && *s == '#') { |
| 258 | while (s < PL_bufend && *s != '\n') |
| 259 | s++; |
| 260 | if (s < PL_bufend) { |
| 261 | s++; |
| 262 | if (PL_in_eval && !PL_rsfp) { |
| 263 | incline(s); |
| 264 | continue; |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | /* only continue to recharge the buffer if we're at the end |
| 270 | * of the buffer, we're not reading from a source filter, and |
| 271 | * we're in normal lexing mode |
| 272 | */ |
| 273 | if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat || |
| 274 | PL_lex_state == LEX_FORMLINE) |
| 275 | return s; |
| 276 | |
| 277 | /* try to recharge the buffer */ |
| 278 | if ((s = filter_gets(PL_linestr, PL_rsfp, |
| 279 | (prevlen = SvCUR(PL_linestr)))) == Nullch) |
| 280 | { |
| 281 | /* end of file. Add on the -p or -n magic */ |
| 282 | if (PL_minus_p) { |
| 283 | sv_setpv(PL_linestr, |
| 284 | ";}continue{print or die qq(-p destination: $!\\n);}"); |
| 285 | PL_minus_n = PL_minus_p = 0; |
| 286 | } |
| 287 | else if (PL_minus_n) { |
| 288 | sv_setpvn(PL_linestr, ";}", 2); |
| 289 | PL_minus_n = 0; |
| 290 | } |
| 291 | else |
| 292 | sv_setpvn(PL_linestr,";", 1); |
| 293 | |
| 294 | /* reset variables for next time we lex */ |
| 295 | PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart |
| 296 | = SvPVX(PL_linestr); |
| 297 | PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); |
| 298 | PL_last_lop = PL_last_uni = Nullch; |
| 299 | |
| 300 | /* Close the filehandle. Could be from -P preprocessor, |
| 301 | * STDIN, or a regular file. If we were reading code from |
| 302 | * STDIN (because the commandline held no -e or filename) |
| 303 | * then we don't close it, we reset it so the code can |
| 304 | * read from STDIN too. |
| 305 | */ |
| 306 | |
| 307 | if (PL_preprocess && !PL_in_eval) |
| 308 | (void)PerlProc_pclose(PL_rsfp); |
| 309 | else if ((PerlIO*)PL_rsfp == PerlIO_stdin()) |
| 310 | PerlIO_clearerr(PL_rsfp); |
| 311 | else |
| 312 | (void)PerlIO_close(PL_rsfp); |
| 313 | PL_rsfp = Nullfp; |
| 314 | return s; |
| 315 | } |
| 316 | |
| 317 | /* not at end of file, so we only read another line */ |
| 318 | /* make corresponding updates to old pointers, for yyerror() */ |
| 319 | oldprevlen = PL_oldbufptr - PL_bufend; |
| 320 | oldoldprevlen = PL_oldoldbufptr - PL_bufend; |
| 321 | if (PL_last_uni) |
| 322 | oldunilen = PL_last_uni - PL_bufend; |
| 323 | if (PL_last_lop) |
| 324 | oldloplen = PL_last_lop - PL_bufend; |
| 325 | PL_linestart = PL_bufptr = s + prevlen; |
| 326 | PL_bufend = s + SvCUR(PL_linestr); |
| 327 | s = PL_bufptr; |
| 328 | PL_oldbufptr = s + oldprevlen; |
| 329 | PL_oldoldbufptr = s + oldoldprevlen; |
| 330 | if (PL_last_uni) |
| 331 | PL_last_uni = s + oldunilen; |
| 332 | if (PL_last_lop) |
| 333 | PL_last_lop = s + oldloplen; |
| 334 | incline(s); |
| 335 | |
| 336 | /* debugger active and we're not compiling the debugger code, |
| 337 | * so store the line into the debugger's array of lines |
| 338 | */ |
| 339 | if (PERLDB_LINE && PL_curstash != PL_debstash) { |
| 340 | SV * const sv = NEWSV(85,0); |
| 341 | |
| 342 | sv_upgrade(sv, SVt_PVMG); |
| 343 | sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr); |
| 344 | (void)SvIOK_on(sv); |
| 345 | SvIV_set(sv, 0); |
| 346 | av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv); |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | STATIC char * |
| 352 | S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp) |
| 353 | { |
| 354 | register char *d = dest; |
| 355 | register char * const e = d + destlen - 3; /* two-character token, ending NUL */ |
| 356 | for (;;) { |
| 357 | if (d >= e) |
| 358 | Perl_croak(aTHX_ ident_too_long); |
| 359 | if (isALNUM(*s)) /* UTF handled below */ |
| 360 | *d++ = *s++; |
| 361 | else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) { |
| 362 | *d++ = ':'; |
| 363 | *d++ = ':'; |
| 364 | s++; |
| 365 | } |
| 366 | else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') { |
| 367 | *d++ = *s++; |
| 368 | *d++ = *s++; |
| 369 | } |
| 370 | else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) { |
| 371 | char *t = s + UTF8SKIP(s); |
| 372 | while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t)) |
| 373 | t += UTF8SKIP(t); |
| 374 | if (d + (t - s) > e) |
| 375 | Perl_croak(aTHX_ ident_too_long); |
| 376 | Copy(s, d, t - s, char); |
| 377 | d += t - s; |
| 378 | s = t; |
| 379 | } |
| 380 | else { |
| 381 | *d = '\0'; |
| 382 | *slp = d - dest; |
| 383 | return s; |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * S_incline |
| 390 | * This subroutine has nothing to do with tilting, whether at windmills |
| 391 | * or pinball tables. Its name is short for "increment line". It |
| 392 | * increments the current line number in CopLINE(PL_curcop) and checks |
| 393 | * to see whether the line starts with a comment of the form |
| 394 | * # line 500 "foo.pm" |
| 395 | * If so, it sets the current line number and file to the values in the comment. |
| 396 | */ |
| 397 | |
| 14ab3472 |
398 | /* 5.9+ make the char *s in S_incline const and declare it in proto.h so we |
| 399 | need to do the same to avoid a prototype mismatch (mst) */ |
| 400 | #ifdef PERL_5_9_PLUS |
| 401 | #define S_INCLINE_CONST const |
| 402 | #else |
| 403 | #define S_INCLINE_CONST |
| 404 | #endif |
| 405 | |
| e807ee50 |
406 | STATIC void |
| 14ab3472 |
407 | S_incline(pTHX_ S_INCLINE_CONST char *s) |
| e807ee50 |
408 | { |
| 409 | char *t; |
| 14ab3472 |
410 | S_INCLINE_CONST char *n; |
| 411 | S_INCLINE_CONST char *e; |
| e807ee50 |
412 | char ch; |
| 413 | |
| 414 | CopLINE_inc(PL_curcop); |
| 415 | if (*s++ != '#') |
| 416 | return; |
| 417 | while (SPACE_OR_TAB(*s)) s++; |
| 418 | if (strnEQ(s, "line", 4)) |
| 419 | s += 4; |
| 420 | else |
| 421 | return; |
| 422 | if (SPACE_OR_TAB(*s)) |
| 423 | s++; |
| 424 | else |
| 425 | return; |
| 426 | while (SPACE_OR_TAB(*s)) s++; |
| 427 | if (!isDIGIT(*s)) |
| 428 | return; |
| 429 | n = s; |
| 430 | while (isDIGIT(*s)) |
| 431 | s++; |
| 432 | while (SPACE_OR_TAB(*s)) |
| 433 | s++; |
| 434 | if (*s == '"' && (t = strchr(s+1, '"'))) { |
| 435 | s++; |
| 436 | e = t + 1; |
| 437 | } |
| 438 | else { |
| 14ab3472 |
439 | /* explicitly cast to char * in case S_INCLINE_CONST in force (mst) */ |
| 440 | for (t = (char *)s; !isSPACE(*t); t++) ; |
| e807ee50 |
441 | e = t; |
| 442 | } |
| 443 | while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f') |
| 444 | e++; |
| 445 | if (*e != '\n' && *e != '\0') |
| 446 | return; /* false alarm */ |
| 447 | |
| 448 | ch = *t; |
| 449 | *t = '\0'; |
| 450 | if (t - s > 0) { |
| 71511651 |
451 | /* this chunk was added to S_incline during 5.8.8. I don't know why but I don't |
| 452 | honestly care since I probably want to be bug-compatible anyway (mst) */ |
| 453 | |
| 454 | /* ... my kingdom for a perl parser in perl ... (mst) */ |
| 455 | |
| 456 | #ifdef PERL_5_8_8_PLUS |
| e807ee50 |
457 | #ifndef USE_ITHREADS |
| 458 | const char *cf = CopFILE(PL_curcop); |
| 459 | if (cf && strlen(cf) > 7 && strnEQ(cf, "(eval ", 6)) { |
| 460 | /* must copy *{"::_<(eval N)[oldfilename:L]"} |
| 461 | * to *{"::_<newfilename"} */ |
| 462 | char smallbuf[256], smallbuf2[256]; |
| 463 | char *tmpbuf, *tmpbuf2; |
| 464 | GV **gvp, *gv2; |
| 465 | STRLEN tmplen = strlen(cf); |
| 466 | STRLEN tmplen2 = strlen(s); |
| 467 | if (tmplen + 3 < sizeof smallbuf) |
| 468 | tmpbuf = smallbuf; |
| 469 | else |
| 470 | Newx(tmpbuf, tmplen + 3, char); |
| 471 | if (tmplen2 + 3 < sizeof smallbuf2) |
| 472 | tmpbuf2 = smallbuf2; |
| 473 | else |
| 474 | Newx(tmpbuf2, tmplen2 + 3, char); |
| 475 | tmpbuf[0] = tmpbuf2[0] = '_'; |
| 476 | tmpbuf[1] = tmpbuf2[1] = '<'; |
| 477 | memcpy(tmpbuf + 2, cf, ++tmplen); |
| 478 | memcpy(tmpbuf2 + 2, s, ++tmplen2); |
| 479 | ++tmplen; ++tmplen2; |
| 480 | gvp = (GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, FALSE); |
| 481 | if (gvp) { |
| 482 | gv2 = *(GV**)hv_fetch(PL_defstash, tmpbuf2, tmplen2, TRUE); |
| 483 | if (!isGV(gv2)) |
| 484 | gv_init(gv2, PL_defstash, tmpbuf2, tmplen2, FALSE); |
| 485 | /* adjust ${"::_<newfilename"} to store the new file name */ |
| 486 | GvSV(gv2) = newSVpvn(tmpbuf2 + 2, tmplen2 - 2); |
| 487 | GvHV(gv2) = (HV*)SvREFCNT_inc(GvHV(*gvp)); |
| 488 | GvAV(gv2) = (AV*)SvREFCNT_inc(GvAV(*gvp)); |
| 489 | } |
| 490 | if (tmpbuf != smallbuf) Safefree(tmpbuf); |
| 491 | if (tmpbuf2 != smallbuf2) Safefree(tmpbuf2); |
| 492 | } |
| 493 | #endif |
| 71511651 |
494 | #endif |
| 495 | /* second endif closes out the "are we 5.8.(8+)" conditional */ |
| e807ee50 |
496 | CopFILE_free(PL_curcop); |
| 497 | CopFILE_set(PL_curcop, s); |
| 498 | } |
| 499 | *t = ch; |
| 500 | CopLINE_set(PL_curcop, atoi(n)-1); |
| 501 | } |
| 0ba8c7aa |
502 | |
| 503 | /* scan_str |
| 504 | takes: start position in buffer |
| 505 | keep_quoted preserve \ on the embedded delimiter(s) |
| 506 | keep_delims preserve the delimiters around the string |
| 507 | returns: position to continue reading from buffer |
| 508 | side-effects: multi_start, multi_close, lex_repl or lex_stuff, and |
| 509 | updates the read buffer. |
| 510 | |
| 511 | This subroutine pulls a string out of the input. It is called for: |
| 512 | q single quotes q(literal text) |
| 513 | ' single quotes 'literal text' |
| 514 | qq double quotes qq(interpolate $here please) |
| 515 | " double quotes "interpolate $here please" |
| 516 | qx backticks qx(/bin/ls -l) |
| 517 | ` backticks `/bin/ls -l` |
| 518 | qw quote words @EXPORT_OK = qw( func() $spam ) |
| 519 | m// regexp match m/this/ |
| 520 | s/// regexp substitute s/this/that/ |
| 521 | tr/// string transliterate tr/this/that/ |
| 522 | y/// string transliterate y/this/that/ |
| 523 | ($*@) sub prototypes sub foo ($) |
| 524 | (stuff) sub attr parameters sub foo : attr(stuff) |
| 525 | <> readline or globs <FOO>, <>, <$fh>, or <*.c> |
| 526 | |
| 527 | In most of these cases (all but <>, patterns and transliterate) |
| 528 | yylex() calls scan_str(). m// makes yylex() call scan_pat() which |
| 529 | calls scan_str(). s/// makes yylex() call scan_subst() which calls |
| 530 | scan_str(). tr/// and y/// make yylex() call scan_trans() which |
| 531 | calls scan_str(). |
| 532 | |
| 533 | It skips whitespace before the string starts, and treats the first |
| 534 | character as the delimiter. If the delimiter is one of ([{< then |
| 535 | the corresponding "close" character )]}> is used as the closing |
| 536 | delimiter. It allows quoting of delimiters, and if the string has |
| 537 | balanced delimiters ([{<>}]) it allows nesting. |
| 538 | |
| 539 | On success, the SV with the resulting string is put into lex_stuff or, |
| 540 | if that is already non-NULL, into lex_repl. The second case occurs only |
| 541 | when parsing the RHS of the special constructs s/// and tr/// (y///). |
| 542 | For convenience, the terminating delimiter character is stuffed into |
| 543 | SvIVX of the SV. |
| 544 | */ |
| 545 | |
| 546 | STATIC char * |
| 547 | S_scan_str(pTHX_ char *start, int keep_quoted, int keep_delims) |
| 548 | { |
| 549 | SV *sv; /* scalar value: string */ |
| 550 | char *tmps; /* temp string, used for delimiter matching */ |
| 551 | register char *s = start; /* current position in the buffer */ |
| 552 | register char term; /* terminating character */ |
| 553 | register char *to; /* current position in the sv's data */ |
| 554 | I32 brackets = 1; /* bracket nesting level */ |
| 555 | bool has_utf8 = FALSE; /* is there any utf8 content? */ |
| 556 | I32 termcode; /* terminating char. code */ |
| 71511651 |
557 | /* 5.8.7+ uses UTF8_MAXBYTES but also its utf8.h defs _MAXLEN to it so |
| 558 | I'm reasonably hopeful this won't destroy anything (mst) */ |
| 559 | U8 termstr[UTF8_MAXLEN]; /* terminating string */ |
| 0ba8c7aa |
560 | STRLEN termlen; /* length of terminating string */ |
| 561 | char *last = NULL; /* last position for nesting bracket */ |
| 562 | |
| 563 | /* skip space before the delimiter */ |
| 564 | if (isSPACE(*s)) |
| 565 | s = skipspace(s); |
| 566 | |
| 567 | /* mark where we are, in case we need to report errors */ |
| 568 | CLINE; |
| 569 | |
| 570 | /* after skipping whitespace, the next character is the terminator */ |
| 571 | term = *s; |
| 572 | if (!UTF) { |
| 573 | termcode = termstr[0] = term; |
| 574 | termlen = 1; |
| 575 | } |
| 576 | else { |
| 577 | termcode = utf8_to_uvchr((U8*)s, &termlen); |
| 578 | Copy(s, termstr, termlen, U8); |
| 579 | if (!UTF8_IS_INVARIANT(term)) |
| 580 | has_utf8 = TRUE; |
| 581 | } |
| 582 | |
| 583 | /* mark where we are */ |
| 584 | PL_multi_start = CopLINE(PL_curcop); |
| 585 | PL_multi_open = term; |
| 586 | |
| 587 | /* find corresponding closing delimiter */ |
| 588 | if (term && (tmps = strchr("([{< )]}> )]}>",term))) |
| 589 | termcode = termstr[0] = term = tmps[5]; |
| 590 | |
| 591 | PL_multi_close = term; |
| 592 | |
| 593 | /* create a new SV to hold the contents. 87 is leak category, I'm |
| 594 | assuming. 79 is the SV's initial length. What a random number. */ |
| 595 | sv = NEWSV(87,79); |
| 596 | sv_upgrade(sv, SVt_PVIV); |
| 597 | SvIV_set(sv, termcode); |
| 598 | (void)SvPOK_only(sv); /* validate pointer */ |
| 599 | |
| 600 | /* move past delimiter and try to read a complete string */ |
| 601 | if (keep_delims) |
| 602 | sv_catpvn(sv, s, termlen); |
| 603 | s += termlen; |
| 604 | for (;;) { |
| 605 | if (PL_encoding && !UTF) { |
| 606 | bool cont = TRUE; |
| 607 | |
| 608 | while (cont) { |
| 609 | int offset = s - SvPVX_const(PL_linestr); |
| 610 | const bool found = sv_cat_decode(sv, PL_encoding, PL_linestr, |
| 611 | &offset, (char*)termstr, termlen); |
| 612 | const char *ns = SvPVX_const(PL_linestr) + offset; |
| 613 | char *svlast = SvEND(sv) - 1; |
| 614 | |
| 615 | for (; s < ns; s++) { |
| 616 | if (*s == '\n' && !PL_rsfp) |
| 617 | CopLINE_inc(PL_curcop); |
| 618 | } |
| 619 | if (!found) |
| 620 | goto read_more_line; |
| 621 | else { |
| 622 | /* handle quoted delimiters */ |
| 623 | if (SvCUR(sv) > 1 && *(svlast-1) == '\\') { |
| 624 | const char *t; |
| 625 | for (t = svlast-2; t >= SvPVX_const(sv) && *t == '\\';) |
| 626 | t--; |
| 627 | if ((svlast-1 - t) % 2) { |
| 628 | if (!keep_quoted) { |
| 629 | *(svlast-1) = term; |
| 630 | *svlast = '\0'; |
| 631 | SvCUR_set(sv, SvCUR(sv) - 1); |
| 632 | } |
| 633 | continue; |
| 634 | } |
| 635 | } |
| 636 | if (PL_multi_open == PL_multi_close) { |
| 637 | cont = FALSE; |
| 638 | } |
| 639 | else { |
| 640 | const char *t; |
| 641 | char *w; |
| 642 | if (!last) |
| 643 | last = SvPVX(sv); |
| 644 | for (t = w = last; t < svlast; w++, t++) { |
| 645 | /* At here, all closes are "was quoted" one, |
| 646 | so we don't check PL_multi_close. */ |
| 647 | if (*t == '\\') { |
| 648 | if (!keep_quoted && *(t+1) == PL_multi_open) |
| 649 | t++; |
| 650 | else |
| 651 | *w++ = *t++; |
| 652 | } |
| 653 | else if (*t == PL_multi_open) |
| 654 | brackets++; |
| 655 | |
| 656 | *w = *t; |
| 657 | } |
| 658 | if (w < t) { |
| 659 | *w++ = term; |
| 660 | *w = '\0'; |
| 661 | SvCUR_set(sv, w - SvPVX_const(sv)); |
| 662 | } |
| 663 | last = w; |
| 664 | if (--brackets <= 0) |
| 665 | cont = FALSE; |
| 666 | } |
| 667 | } |
| 668 | } |
| 669 | if (!keep_delims) { |
| 670 | SvCUR_set(sv, SvCUR(sv) - 1); |
| 671 | *SvEND(sv) = '\0'; |
| 672 | } |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | /* extend sv if need be */ |
| 677 | SvGROW(sv, SvCUR(sv) + (PL_bufend - s) + 1); |
| 678 | /* set 'to' to the next character in the sv's string */ |
| 679 | to = SvPVX(sv)+SvCUR(sv); |
| 680 | |
| 681 | /* if open delimiter is the close delimiter read unbridle */ |
| 682 | if (PL_multi_open == PL_multi_close) { |
| 683 | for (; s < PL_bufend; s++,to++) { |
| 684 | /* embedded newlines increment the current line number */ |
| 685 | if (*s == '\n' && !PL_rsfp) |
| 686 | CopLINE_inc(PL_curcop); |
| 687 | /* handle quoted delimiters */ |
| 688 | if (*s == '\\' && s+1 < PL_bufend && term != '\\') { |
| 689 | if (!keep_quoted && s[1] == term) |
| 690 | s++; |
| 691 | /* any other quotes are simply copied straight through */ |
| 692 | else |
| 693 | *to++ = *s++; |
| 694 | } |
| 695 | /* terminate when run out of buffer (the for() condition), or |
| 696 | have found the terminator */ |
| 697 | else if (*s == term) { |
| 698 | if (termlen == 1) |
| 699 | break; |
| 700 | if (s+termlen <= PL_bufend && memEQ(s, (char*)termstr, termlen)) |
| 701 | break; |
| 702 | } |
| 703 | else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF) |
| 704 | has_utf8 = TRUE; |
| 705 | *to = *s; |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | /* if the terminator isn't the same as the start character (e.g., |
| 710 | matched brackets), we have to allow more in the quoting, and |
| 711 | be prepared for nested brackets. |
| 712 | */ |
| 713 | else { |
| 714 | /* read until we run out of string, or we find the terminator */ |
| 715 | for (; s < PL_bufend; s++,to++) { |
| 716 | /* embedded newlines increment the line count */ |
| 717 | if (*s == '\n' && !PL_rsfp) |
| 718 | CopLINE_inc(PL_curcop); |
| 719 | /* backslashes can escape the open or closing characters */ |
| 720 | if (*s == '\\' && s+1 < PL_bufend) { |
| 721 | if (!keep_quoted && |
| 722 | ((s[1] == PL_multi_open) || (s[1] == PL_multi_close))) |
| 723 | s++; |
| 724 | else |
| 725 | *to++ = *s++; |
| 726 | } |
| 727 | /* allow nested opens and closes */ |
| 728 | else if (*s == PL_multi_close && --brackets <= 0) |
| 729 | break; |
| 730 | else if (*s == PL_multi_open) |
| 731 | brackets++; |
| 732 | else if (!has_utf8 && !UTF8_IS_INVARIANT((U8)*s) && UTF) |
| 733 | has_utf8 = TRUE; |
| 734 | *to = *s; |
| 735 | } |
| 736 | } |
| 737 | /* terminate the copied string and update the sv's end-of-string */ |
| 738 | *to = '\0'; |
| 739 | SvCUR_set(sv, to - SvPVX_const(sv)); |
| 740 | |
| 741 | /* |
| 742 | * this next chunk reads more into the buffer if we're not done yet |
| 743 | */ |
| 744 | |
| 745 | if (s < PL_bufend) |
| 746 | break; /* handle case where we are done yet :-) */ |
| 747 | |
| 748 | #ifndef PERL_STRICT_CR |
| 749 | if (to - SvPVX_const(sv) >= 2) { |
| 750 | if ((to[-2] == '\r' && to[-1] == '\n') || |
| 751 | (to[-2] == '\n' && to[-1] == '\r')) |
| 752 | { |
| 753 | to[-2] = '\n'; |
| 754 | to--; |
| 755 | SvCUR_set(sv, to - SvPVX_const(sv)); |
| 756 | } |
| 757 | else if (to[-1] == '\r') |
| 758 | to[-1] = '\n'; |
| 759 | } |
| 760 | else if (to - SvPVX_const(sv) == 1 && to[-1] == '\r') |
| 761 | to[-1] = '\n'; |
| 762 | #endif |
| 763 | |
| 764 | read_more_line: |
| 765 | /* if we're out of file, or a read fails, bail and reset the current |
| 766 | line marker so we can report where the unterminated string began |
| 767 | */ |
| 768 | if (!PL_rsfp || |
| 769 | !(PL_oldoldbufptr = PL_oldbufptr = s = PL_linestart = filter_gets(PL_linestr, PL_rsfp, 0))) { |
| 770 | sv_free(sv); |
| 771 | CopLINE_set(PL_curcop, (line_t)PL_multi_start); |
| 772 | return Nullch; |
| 773 | } |
| 774 | /* we read a line, so increment our line counter */ |
| 775 | CopLINE_inc(PL_curcop); |
| 776 | |
| 777 | /* update debugger info */ |
| 778 | if (PERLDB_LINE && PL_curstash != PL_debstash) { |
| 779 | SV *sv = NEWSV(88,0); |
| 780 | |
| 781 | sv_upgrade(sv, SVt_PVMG); |
| 782 | sv_setsv(sv,PL_linestr); |
| 783 | (void)SvIOK_on(sv); |
| 784 | SvIV_set(sv, 0); |
| 785 | av_store(CopFILEAV(PL_curcop), (I32)CopLINE(PL_curcop), sv); |
| 786 | } |
| 787 | |
| 788 | /* having changed the buffer, we must update PL_bufend */ |
| 789 | PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr); |
| 790 | PL_last_lop = PL_last_uni = Nullch; |
| 791 | } |
| 792 | |
| 793 | /* at this point, we have successfully read the delimited string */ |
| 794 | |
| 795 | if (!PL_encoding || UTF) { |
| 796 | if (keep_delims) |
| 797 | sv_catpvn(sv, s, termlen); |
| 798 | s += termlen; |
| 799 | } |
| 800 | if (has_utf8 || PL_encoding) |
| 801 | SvUTF8_on(sv); |
| 802 | |
| 803 | PL_multi_end = CopLINE(PL_curcop); |
| 804 | |
| 805 | /* if we allocated too much space, give some back */ |
| 806 | if (SvCUR(sv) + 5 < SvLEN(sv)) { |
| 807 | SvLEN_set(sv, SvCUR(sv) + 1); |
| 71511651 |
808 | /* 5.8.8 uses SvPV_renew, no prior version actually has the damn thing (mst) */ |
| 809 | #ifdef PERL_5_8_8_PLUS |
| 0ba8c7aa |
810 | SvPV_renew(sv, SvLEN(sv)); |
| 71511651 |
811 | #else |
| 812 | Renew(SvPVX(sv), SvLEN(sv), char); |
| 813 | #endif |
| 0ba8c7aa |
814 | } |
| 815 | |
| 816 | /* decide whether this is the first or second quoted string we've read |
| 817 | for this op |
| 818 | */ |
| 819 | |
| 820 | if (PL_lex_stuff) |
| 821 | PL_lex_repl = sv; |
| 822 | else |
| 823 | PL_lex_stuff = sv; |
| 824 | return s; |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * S_force_next |
| 829 | * When the lexer realizes it knows the next token (for instance, |
| 830 | * it is reordering tokens for the parser) then it can call S_force_next |
| 831 | * to know what token to return the next time the lexer is called. Caller |
| 832 | * will need to set PL_nextval[], and possibly PL_expect to ensure the lexer |
| 833 | * handles the token correctly. |
| 834 | */ |
| 835 | |
| 836 | STATIC void |
| 837 | S_force_next(pTHX_ I32 type) |
| 838 | { |
| 839 | PL_nexttype[PL_nexttoke] = type; |
| 840 | PL_nexttoke++; |
| 841 | if (PL_lex_state != LEX_KNOWNEXT) { |
| 842 | PL_lex_defer = PL_lex_state; |
| 843 | PL_lex_expect = PL_expect; |
| 844 | PL_lex_state = LEX_KNOWNEXT; |
| 845 | } |
| 846 | } |
projects / p5sagit/Devel-Declare.git / blame