diff options
| -rw-r--r-- | deb.c | 5 | ||||
| -rw-r--r-- | doio.c | 5 | ||||
| -rw-r--r-- | doop.c | 5 | ||||
| -rw-r--r-- | dump.c | 7 | ||||
| -rw-r--r-- | gv.c | 9 | ||||
| -rw-r--r-- | hv.c | 10 | ||||
| -rw-r--r-- | locale.c | 5 | ||||
| -rw-r--r-- | malloc.c | 6 | ||||
| -rw-r--r-- | mg.c | 18 | ||||
| -rw-r--r-- | miniperlmain.c | 9 | ||||
| -rw-r--r-- | numeric.c | 6 | ||||
| -rw-r--r-- | op.c | 24 | ||||
| -rw-r--r-- | pad.c | 5 | ||||
| -rw-r--r-- | perl.c | 6 | ||||
| -rw-r--r-- | perlio.c | 6 | ||||
| -rw-r--r-- | perly.act | 368 | ||||
| -rw-r--r-- | perly.h | 2 | ||||
| -rw-r--r-- | perly.tab | 42 | ||||
| -rw-r--r-- | perly.y | 9 | ||||
| -rw-r--r-- | pp.c | 7 | ||||
| -rw-r--r-- | pp_ctl.c | 11 | ||||
| -rw-r--r-- | pp_hot.c | 13 | ||||
| -rw-r--r-- | pp_pack.c | 11 | ||||
| -rw-r--r-- | pp_sort.c | 11 | ||||
| -rw-r--r-- | pp_sys.c | 9 | ||||
| -rw-r--r-- | regcomp.c | 5 | ||||
| -rw-r--r-- | regexec.c | 5 | ||||
| -rw-r--r-- | run.c | 13 | ||||
| -rw-r--r-- | scope.c | 7 | ||||
| -rw-r--r-- | taint.c | 3 | ||||
| -rw-r--r-- | universal.c | 4 | ||||
| -rw-r--r-- | utf8.c | 5 | ||||
| -rw-r--r-- | util.c | 6 |
33 files changed, 451 insertions, 206 deletions
@@ -13,6 +13,11 @@ * have seen more than thou knowest, Gray Fool." --Denethor */ +/* + * This file contains various utilites for producing debugging output + * (mainly related to displaying the stack) + */ + #include "EXTERN.h" #define PERL_IN_DEB_C #include "perl.h" @@ -15,6 +15,11 @@ * chattering, into calmer and more level reaches." */ +/* This file contains functions that do the actual I/O on behalf of ops. + * For example, pp_print() calls the do_print() function in this file for + * each argument needing printing. + */ + #include "EXTERN.h" #define PERL_IN_DOIO_C #include "perl.h" @@ -12,6 +12,11 @@ * "'So that was the job I felt I had to do when I started,' thought Sam." */ +/* This file contains some common functions needed to carry out certain + * ops. For example both pp_schomp() and pp_chomp() - scalar and array + * chomp operations - call the function do_chomp() found in this file. + */ + #include "EXTERN.h" #define PERL_IN_DOOP_C #include "perl.h" @@ -13,6 +13,13 @@ * it has not been hard for me to read your mind and memory.'" */ +/* This file contains utility routines to dump the contents of SV and OP + * structures, as used by comand-line options like -Dt and -Dx, and + * by Devel::Peek. + * + * It also holds the debugging version of the runops function. + */ + #include "EXTERN.h" #define PERL_IN_DUMP_C #include "perl.h" @@ -19,6 +19,15 @@ /* =head1 GV Functions + +A GV is a structure which corresponds to to a Perl typeglob, ie *foo. +It is a structure that holds a pointer to a scalar, an array, a hash etc, +corresponding to $foo, @foo, %foo. + +GVs are usually found as values in stashes (symbol table hashes) where +Perl stores its global variables. + +=cut */ #include "EXTERN.h" @@ -14,6 +14,16 @@ /* =head1 Hash Manipulation Functions + +A HV structure represents a Perl hash. It consists mainly of an array +of pointers, each of which points to a linked list of HE structures. The +array is indexed by the hash function of the key, so each linked list +represents all the hash entries with the same hash value. Each HE contains +a pointer to the actual value, plus a pointer to a HEK structure which +holds the key and hash value. + +=cut + */ #include "EXTERN.h" @@ -18,6 +18,10 @@ * nef aear, si nef aearon! */ +/* utility functions for handling locale-specific stuff like what + * character represents the decimal point. + */ + #include "EXTERN.h" #define PERL_IN_LOCALE_C #include "perl.h" @@ -560,6 +564,7 @@ Perl_init_i18nl14n(pTHX_ int printwarn) * The real transformed data begins at offset sizeof(collationix). * Please see sv_collxfrm() to see how this is used. */ + char * Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) { @@ -6,6 +6,12 @@ * "'The Chamber of Records,' said Gimli. 'I guess that is where we now stand.'" */ +/* This file contains Perl's own implementation of the malloc library. + * It is used if Configure decides that, on your platform, Perl's + * version is better than the OS's, or if you give Configure the + * -Dusemymalloc command-line option. + */ + /* Here are some notes on configuring Perl's malloc. (For non-perl usage see below.) @@ -15,6 +15,24 @@ /* =head1 Magical Functions + +"Magic" is special data attached to SV structures in order to give them +"magical" properties. When any Perl code tries to read from, or assign to, +an SV marked as magical, it calls the 'get' or 'set' function associated +with that SV's magic. A get is called prior to reading an SV, in order to +give it a chance to update its interval value (get on $. writes the line +number of the last read filehandle into to the SV's IV slot), while +set is called after an SV has been written to, in order to allow it to make +use of it's changed value (set on $/ copies the SV's new value to the +PL_rs global variable). + +Magic is implemented as a linked list of MAGIC structures attached to the +SV. Each MAGIC struct holds the type of the magic, a pointer to an array +of functions that implement the get(), set(), length() etc functions, +plus space for some flags and pointers. For example, a tied variable has +a MAGIC structure that contains a pointer to the object associated with the +tie. + */ #include "EXTERN.h" diff --git a/miniperlmain.c b/miniperlmain.c index 4e9e5e889e..3cc25f80f9 100644 --- a/miniperlmain.c +++ b/miniperlmain.c @@ -12,6 +12,15 @@ * "The Road goes ever on and on, down from the door where it began." */ +/* This file contains the main() function for the perl interpreter. + * Note that miniperlmain.c contains main() for the 'miniperl' binary, + * while perlmain.c contains main() for the 'perl' binary. + * + * Miniperl is like perl except that does not support dynamic loading, + * and in fact is used to build the dynamic modules need for the 'real' + * perl execuable. + */ + #ifdef OEMVS #ifdef MYMALLOC /* sbrk is limited to first heap segement so make it big */ @@ -15,6 +15,12 @@ /* =head1 Numeric functions + +This file contains all the stuff needed by perl for manipulating numeric +values, including such things as replacements for the OS's atof() function + +=cut + */ #include "EXTERN.h" @@ -16,6 +16,30 @@ * either way, as the saying is, if you follow me." --the Gaffer */ +/* This file contains the functions that create, manipulate and optimize + * the OP structures that hold a compiled perl program. + * + * A Perl program is compiled into a tree of OPs. Each op contains + * structural pointers (eg to its siblings and the next op in the + * execution sequence), a pointer to the function that would execute the + * op, plus any data specific to that op. For example, an OP_CONST op + * points to the pp_const() function and to an SV containing the constant + * value. When pp_const() is executed, its job is to push that SV onto the + * stack. + * + * OPs are mainly created by the newFOO() functions, which are mainly + * called from the parser (in perly.y) as the code is parsed. For example + * the Perl code $a + $b * $c would cause the equivalent of the following + * to be called (oversimplifying a bit): + * + * newBINOP(OP_ADD, flags, + * newSVREF($a), + * newBINOP(OP_MULTIPLY, flags, newSVREF($b), newSVREF($c)) + * ) + * + * Note that during the build of miniperl, a temporary copy of this file + * is made, called opmini.c. + */ #include "EXTERN.h" #define PERL_IN_OP_C @@ -22,6 +22,11 @@ /* =head1 Pad Data Structures +This file contains the functions that create and manipluate scratchpads, +which are array-of-array data structures attached to a CV (ie a sub) +and which store lexical variables and opcode temporay and per-thread +values. + =for apidoc m|AV *|CvPADLIST|CV *cv CV's can have CvPADLIST(cv) set to point to an AV. @@ -12,6 +12,12 @@ * "A ship then new they built for him/of mithril and of elven glass" --Bilbo */ +/* This file contains the top-level functions that are used to create, use + * and destroy a perl interpreter, plus the functions used by XS code to + * call back into perl. Note that it does not contain the actual main() + * function of the interpreter; that can be found perlmain.c + */ + /* PSz 12 Nov 03 * * Be proud that perl(1) may proclaim: @@ -9,6 +9,12 @@ * over passes, and through long dales, and across many streams. */ +/* This file contains the functions needed to implement PerlIO, which + * is Perl's private replacement for the C stdio library. This is used + * by default unless you compile with -Uuseperlio or run with + * PERLIO=:stdio (but don't do this unless you know what you're doing) + */ + /* * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get * at the dispatch tables, even when we do not need it for other reasons. @@ -1,56 +1,56 @@ case 2: -#line 88 "perly.y" +#line 97 "perly.y" { yyval.ival = yyvsp[-1].ival; newPROG(block_end(yyvsp[-1].ival,yyvsp[0].opval)); ;} break; case 3: -#line 93 "perly.y" +#line 102 "perly.y" { if (PL_copline > (line_t)yyvsp[-3].ival) PL_copline = (line_t)yyvsp[-3].ival; yyval.opval = block_end(yyvsp[-2].ival, yyvsp[-1].opval); ;} break; case 4: -#line 99 "perly.y" +#line 108 "perly.y" { yyval.ival = block_start(TRUE); ;} break; case 5: -#line 103 "perly.y" +#line 112 "perly.y" { PL_expect = XSTATE; yyval.ival = block_start(TRUE); ;} break; case 6: -#line 110 "perly.y" +#line 119 "perly.y" { if (PL_copline > (line_t)yyvsp[-3].ival) PL_copline = (line_t)yyvsp[-3].ival; yyval.opval = block_end(yyvsp[-2].ival, yyvsp[-1].opval); ;} break; case 7: -#line 116 "perly.y" +#line 125 "perly.y" { yyval.ival = block_start(FALSE); ;} break; case 8: -#line 120 "perly.y" +#line 129 "perly.y" { yyval.ival = PL_savestack_ix; ;} break; case 9: -#line 124 "perly.y" +#line 133 "perly.y" { yyval.opval = Nullop; ;} break; case 10: -#line 126 "perly.y" +#line 135 "perly.y" { yyval.opval = yyvsp[-1].opval; ;} break; case 11: -#line 128 "perly.y" +#line 137 "perly.y" { LEAVE_SCOPE(yyvsp[-1].ival); yyval.opval = append_list(OP_LINESEQ, (LISTOP*)yyvsp[-2].opval, (LISTOP*)yyvsp[0].opval); @@ -59,12 +59,12 @@ case 2: break; case 12: -#line 137 "perly.y" +#line 146 "perly.y" { yyval.opval = newSTATEOP(0, yyvsp[-1].pval, yyvsp[0].opval); ;} break; case 14: -#line 140 "perly.y" +#line 149 "perly.y" { if (yyvsp[-1].pval != Nullch) { yyval.opval = newSTATEOP(0, yyvsp[-1].pval, newOP(OP_NULL, 0)); } @@ -76,90 +76,90 @@ case 2: break; case 15: -#line 149 "perly.y" +#line 158 "perly.y" { yyval.opval = newSTATEOP(0, yyvsp[-2].pval, yyvsp[-1].opval); PL_expect = XSTATE; ;} break; case 16: -#line 155 "perly.y" +#line 164 "perly.y" { yyval.opval = Nullop; ;} break; case 17: -#line 157 "perly.y" +#line 166 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 18: -#line 159 "perly.y" +#line 168 "perly.y" { yyval.opval = newLOGOP(OP_AND, 0, yyvsp[0].opval, yyvsp[-2].opval); ;} break; case 19: -#line 161 "perly.y" +#line 170 "perly.y" { yyval.opval = newLOGOP(OP_OR, 0, yyvsp[0].opval, yyvsp[-2].opval); ;} break; case 20: -#line 163 "perly.y" +#line 172 "perly.y" { yyval.opval = newLOOPOP(OPf_PARENS, 1, scalar(yyvsp[0].opval), yyvsp[-2].opval); ;} break; case 21: -#line 165 "perly.y" +#line 174 "perly.y" { yyval.opval = newLOOPOP(OPf_PARENS, 1, yyvsp[0].opval, yyvsp[-2].opval);;} break; case 22: -#line 167 "perly.y" +#line 176 "perly.y" { yyval.opval = newFOROP(0, Nullch, (line_t)yyvsp[-1].ival, Nullop, yyvsp[0].opval, yyvsp[-2].opval, Nullop); ;} break; case 23: -#line 173 "perly.y" +#line 182 "perly.y" { yyval.opval = Nullop; ;} break; case 24: -#line 175 "perly.y" +#line 184 "perly.y" { (yyvsp[0].opval)->op_flags |= OPf_PARENS; yyval.opval = scope(yyvsp[0].opval); ;} break; case 25: -#line 177 "perly.y" +#line 186 "perly.y" { PL_copline = (line_t)yyvsp[-5].ival; yyval.opval = newCONDOP(0, yyvsp[-3].opval, scope(yyvsp[-1].opval), yyvsp[0].opval); PL_hints |= HINT_BLOCK_SCOPE; ;} break; case 26: -#line 184 "perly.y" +#line 193 "perly.y" { PL_copline = (line_t)yyvsp[-6].ival; yyval.opval = block_end(yyvsp[-4].ival, newCONDOP(0, yyvsp[-3].opval, scope(yyvsp[-1].opval), yyvsp[0].opval)); ;} break; case 27: -#line 188 "perly.y" +#line 197 "perly.y" { PL_copline = (line_t)yyvsp[-6].ival; yyval.opval = block_end(yyvsp[-4].ival, newCONDOP(0, yyvsp[-3].opval, scope(yyvsp[-1].opval), yyvsp[0].opval)); ;} break; case 28: -#line 195 "perly.y" +#line 204 "perly.y" { yyval.opval = Nullop; ;} break; case 29: -#line 197 "perly.y" +#line 206 "perly.y" { yyval.opval = scope(yyvsp[0].opval); ;} break; case 30: -#line 202 "perly.y" +#line 211 "perly.y" { PL_copline = (line_t)yyvsp[-6].ival; yyval.opval = block_end(yyvsp[-4].ival, newSTATEOP(0, yyvsp[-7].pval, @@ -168,7 +168,7 @@ case 2: break; case 31: -#line 208 "perly.y" +#line 217 "perly.y" { PL_copline = (line_t)yyvsp[-6].ival; yyval.opval = block_end(yyvsp[-4].ival, newSTATEOP(0, yyvsp[-7].pval, @@ -177,26 +177,26 @@ case 2: break; case 32: -#line 214 "perly.y" +#line 223 "perly.y" { yyval.opval = block_end(yyvsp[-6].ival, newFOROP(0, yyvsp[-9].pval, (line_t)yyvsp[-8].ival, yyvsp[-5].opval, yyvsp[-3].opval, yyvsp[-1].opval, yyvsp[0].opval)); ;} break; case 33: -#line 217 "perly.y" +#line 226 "perly.y" { yyval.opval = block_end(yyvsp[-4].ival, newFOROP(0, yyvsp[-8].pval, (line_t)yyvsp[-7].ival, mod(yyvsp[-6].opval, OP_ENTERLOOP), yyvsp[-3].opval, yyvsp[-1].opval, yyvsp[0].opval)); ;} break; case 34: -#line 221 "perly.y" +#line 230 "perly.y" { yyval.opval = block_end(yyvsp[-4].ival, newFOROP(0, yyvsp[-7].pval, (line_t)yyvsp[-6].ival, Nullop, yyvsp[-3].opval, yyvsp[-1].opval, yyvsp[0].opval)); ;} break; case 35: -#line 225 "perly.y" +#line 234 "perly.y" { OP *forop; PL_copline = (line_t)yyvsp[-9].ival; forop = newSTATEOP(0, yyvsp[-10].pval, @@ -214,119 +214,119 @@ case 2: break; case 36: -#line 240 "perly.y" +#line 249 "perly.y" { yyval.opval = newSTATEOP(0, yyvsp[-2].pval, newWHILEOP(0, 1, (LOOP*)Nullop, NOLINE, Nullop, yyvsp[-1].opval, yyvsp[0].opval)); ;} break; case 37: -#line 247 "perly.y" +#line 256 "perly.y" { yyval.opval = Nullop; ;} break; case 39: -#line 253 "perly.y" +#line 262 "perly.y" { (void)scan_num("1", &yylval); yyval.opval = yylval.opval; ;} break; case 41: -#line 259 "perly.y" +#line 268 "perly.y" { yyval.opval = invert(scalar(yyvsp[0].opval)); ;} break; case 42: -#line 264 "perly.y" +#line 273 "perly.y" { yyval.opval = yyvsp[0].opval; intro_my(); ;} break; case 43: -#line 268 "perly.y" +#line 277 "perly.y" { yyval.opval = yyvsp[0].opval; intro_my(); ;} break; case 44: -#line 272 "perly.y" +#line 281 "perly.y" { yyval.opval = yyvsp[0].opval; intro_my(); ;} break; case 45: -#line 276 "perly.y" +#line 285 "perly.y" { yyval.opval = yyvsp[0].opval; intro_my(); ;} break; case 46: -#line 281 "perly.y" +#line 290 "perly.y" { yyval.pval = Nullch; ;} break; case 48: -#line 287 "perly.y" +#line 296 "perly.y" { yyval.ival = 0; ;} break; case 49: -#line 289 "perly.y" +#line 298 "perly.y" { yyval.ival = 0; ;} break; case 50: -#line 291 "perly.y" +#line 300 "perly.y" { yyval.ival = 0; ;} break; case 51: -#line 293 "perly.y" +#line 302 "perly.y" { yyval.ival = 0; ;} break; case 52: -#line 295 "perly.y" +#line 304 "perly.y" { yyval.ival = 0; ;} break; case 53: -#line 299 "perly.y" +#line 308 "perly.y" { newFORM(yyvsp[-2].ival, yyvsp[-1].opval, yyvsp[0].opval); ;} break; case 54: -#line 302 "perly.y" +#line 311 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 55: -#line 303 "perly.y" +#line 312 "perly.y" { yyval.opval = Nullop; ;} break; case 56: -#line 308 "perly.y" +#line 317 "perly.y" { newMYSUB(yyvsp[-4].ival, yyvsp[-3].opval, yyvsp[-2].opval, yyvsp[-1].opval, yyvsp[0].opval); ;} break; case 57: -#line 313 "perly.y" +#line 322 "perly.y" { newATTRSUB(yyvsp[-4].ival, yyvsp[-3].opval, yyvsp[-2].opval, yyvsp[-1].opval, yyvsp[0].opval); ;} break; case 58: -#line 317 "perly.y" +#line 326 "perly.y" { yyval.ival = start_subparse(FALSE, 0); ;} break; case 59: -#line 321 "perly.y" +#line 330 "perly.y" { yyval.ival = start_subparse(FALSE, CVf_ANON); ;} break; case 60: -#line 325 "perly.y" +#line 334 "perly.y" { yyval.ival = start_subparse(TRUE, 0); ;} break; case 61: -#line 329 "perly.y" +#line 338 "perly.y" { STRLEN n_a; char *name = SvPV(((SVOP*)yyvsp[0].opval)->op_sv,n_a); if (strEQ(name, "BEGIN") || strEQ(name, "END") || strEQ(name, "INIT") || strEQ(name, "CHECK")) @@ -335,99 +335,99 @@ case 2: break; case 62: -#line 338 "perly.y" +#line 347 "perly.y" { yyval.opval = Nullop; ;} break; case 64: -#line 344 "perly.y" +#line 353 "perly.y" { yyval.opval = Nullop; ;} break; case 65: -#line 346 "perly.y" +#line 355 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 66: -#line 348 "perly.y" +#line 357 "perly.y" { yyval.opval = Nullop; ;} break; case 67: -#line 353 "perly.y" +#line 362 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 68: -#line 355 "perly.y" +#line 364 "perly.y" { yyval.opval = Nullop; ;} break; case 69: -#line 359 "perly.y" +#line 368 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 70: -#line 360 "perly.y" +#line 369 "perly.y" { yyval.opval = Nullop; PL_expect = XSTATE; ;} break; case 71: -#line 364 "perly.y" +#line 373 "perly.y" { package(yyvsp[-1].opval); ;} break; case 72: -#line 368 "perly.y" +#line 377 "perly.y" { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ ;} break; case 73: -#line 370 "perly.y" +#line 379 "perly.y" { utilize(yyvsp[-6].ival, yyvsp[-5].ival, yyvsp[-3].opval, yyvsp[-2].opval, yyvsp[-1].opval); ;} break; case 74: -#line 375 "perly.y" +#line 384 "perly.y" { yyval.opval = newLOGOP(OP_AND, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 75: -#line 377 "perly.y" +#line 386 "perly.y" { yyval.opval = newLOGOP(yyvsp[-1].ival, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 76: -#line 379 "perly.y" +#line 388 "perly.y" { yyval.opval = newLOGOP(OP_DOR, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 78: -#line 385 "perly.y" +#line 394 "perly.y" { yyval.opval = yyvsp[-1].opval; ;} break; case 79: -#line 387 "perly.y" +#line 396 "perly.y" { yyval.opval = append_elem(OP_LIST, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 81: -#line 393 "perly.y" +#line 402 "perly.y" { yyval.opval = convert(yyvsp[-2].ival, OPf_STACKED, prepend_elem(OP_LIST, newGVREF(yyvsp[-2].ival,yyvsp[-1].opval), yyvsp[0].opval) ); ;} break; case 82: -#line 396 "perly.y" +#line 405 "perly.y" { yyval.opval = convert(yyvsp[-4].ival, OPf_STACKED, prepend_elem(OP_LIST, newGVREF(yyvsp[-4].ival,yyvsp[-2].opval), yyvsp[-1].opval) ); ;} break; case 83: -#line 399 "perly.y" +#line 408 "perly.y" { yyval.opval = convert(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, prepend_elem(OP_LIST, scalar(yyvsp[-5].opval), yyvsp[-1].opval), @@ -435,14 +435,14 @@ case 2: break; case 84: -#line 404 "perly.y" +#line 413 "perly.y" { yyval.opval = convert(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, scalar(yyvsp[-2].opval), newUNOP(OP_METHOD, 0, yyvsp[0].opval))); ;} break; case 85: -#line 408 "perly.y" +#line 417 "perly.y" { yyval.opval = convert(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, prepend_elem(OP_LIST, yyvsp[-1].opval, yyvsp[0].opval), @@ -450,7 +450,7 @@ case 2: break; case 86: -#line 413 "perly.y" +#line 422 "perly.y" { yyval.opval = convert(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, prepend_elem(OP_LIST, yyvsp[-3].opval, yyvsp[-1].opval), @@ -458,60 +458,60 @@ case 2: break; case 87: -#line 418 "perly.y" +#line 427 "perly.y" { yyval.opval = convert(yyvsp[-1].ival, 0, yyvsp[0].opval); ;} break; case 88: -#line 420 "perly.y" +#line 429 "perly.y" { yyval.opval = convert(yyvsp[-3].ival, 0, yyvsp[-1].opval); ;} break; case 89: -#line 422 "perly.y" +#line 431 "perly.y" { yyvsp[0].opval = newANONATTRSUB(yyvsp[-1].ival, 0, Nullop, yyvsp[0].opval); ;} break; case 90: -#line 424 "perly.y" +#line 433 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, prepend_elem(OP_LIST, yyvsp[-2].opval, yyvsp[0].opval), yyvsp[-4].opval)); ;} break; case 93: -#line 438 "perly.y" +#line 447 "perly.y" { yyval.opval = newBINOP(OP_GELEM, 0, yyvsp[-4].opval, scalar(yyvsp[-2].opval)); PL_expect = XOPERATOR; ;} break; case 94: -#line 441 "perly.y" +#line 450 "perly.y" { yyval.opval = newBINOP(OP_AELEM, 0, oopsAV(yyvsp[-3].opval), scalar(yyvsp[-1].opval)); ;} break; case 95: -#line 443 "perly.y" +#line 452 "perly.y" { yyval.opval = newBINOP(OP_AELEM, 0, ref(newAVREF(yyvsp[-4].opval),OP_RV2AV), scalar(yyvsp[-1].opval));;} break; case 96: -#line 447 "perly.y" +#line 456 "perly.y" { yyval.opval = newBINOP(OP_AELEM, 0, ref(newAVREF(yyvsp[-3].opval),OP_RV2AV), scalar(yyvsp[-1].opval));;} break; case 97: -#line 451 "perly.y" +#line 460 "perly.y" { yyval.opval = newBINOP(OP_HELEM, 0, oopsHV(yyvsp[-4].opval), jmaybe(yyvsp[-2].opval)); PL_expect = XOPERATOR; ;} break; case 98: -#line 454 "perly.y" +#line 463 "perly.y" { yyval.opval = newBINOP(OP_HELEM, 0, ref(newHVREF(yyvsp[-5].opval),OP_RV2HV), jmaybe(yyvsp[-2].opval)); @@ -519,7 +519,7 @@ case 2: break; case 99: -#line 459 "perly.y" +#line 468 "perly.y" { yyval.opval = newBINOP(OP_HELEM, 0, ref(newHVREF(yyvsp[-4].opval),OP_RV2HV), jmaybe(yyvsp[-2].opval)); @@ -527,184 +527,184 @@ case 2: break; case 100: -#line 464 "perly.y" +#line 473 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, newCVREF(0, scalar(yyvsp[-3].opval))); ;} break; case 101: -#line 467 "perly.y" +#line 476 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, yyvsp[-1].opval, newCVREF(0, scalar(yyvsp[-4].opval)))); ;} break; case 102: -#line 472 "perly.y" +#line 481 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, yyvsp[-1].opval, newCVREF(0, scalar(yyvsp[-3].opval)))); ;} break; case 103: -#line 476 "perly.y" +#line 485 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, newCVREF(0, scalar(yyvsp[-2].opval))); ;} break; case 104: -#line 482 "perly.y" +#line 491 "perly.y" { yyval.opval = newASSIGNOP(OPf_STACKED, yyvsp[-2].opval, yyvsp[-1].ival, yyvsp[0].opval); ;} break; case 105: -#line 484 "perly.y" +#line 493 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 106: -#line 486 "perly.y" +#line 495 "perly.y" { if (yyvsp[-1].ival != OP_REPEAT) scalar(yyvsp[-2].opval); yyval.opval = newBINOP(yyvsp[-1].ival, 0, yyvsp[-2].opval, scalar(yyvsp[0].opval)); ;} break; case 107: -#line 490 "perly.y" +#line 499 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 108: -#line 492 "perly.y" +#line 501 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 109: -#line 494 "perly.y" +#line 503 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 110: -#line 496 "perly.y" +#line 505 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 111: -#line 498 "perly.y" +#line 507 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 112: -#line 500 "perly.y" +#line 509 "perly.y" { yyval.opval = newBINOP(yyvsp[-1].ival, 0, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval)); ;} break; case 113: -#line 502 "perly.y" +#line 511 "perly.y" { yyval.opval = newRANGE(yyvsp[-1].ival, scalar(yyvsp[-2].opval), scalar(yyvsp[0].opval));;} break; case 114: -#line 504 "perly.y" +#line 513 "perly.y" { yyval.opval = newLOGOP(OP_AND, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 115: -#line 506 "perly.y" +#line 515 "perly.y" { yyval.opval = newLOGOP(OP_OR, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 116: -#line 508 "perly.y" +#line 517 "perly.y" { yyval.opval = newLOGOP(OP_DOR, 0, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 117: -#line 510 "perly.y" +#line 519 "perly.y" { yyval.opval = bind_match(yyvsp[-1].ival, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 118: -#line 515 "perly.y" +#line 524 "perly.y" { yyval.opval = newUNOP(OP_NEGATE, 0, scalar(yyvsp[0].opval)); ;} break; case 119: -#line 517 "perly.y" +#line 526 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 120: -#line 519 "perly.y" +#line 528 "perly.y" { yyval.opval = newUNOP(OP_NOT, 0, scalar(yyvsp[0].opval)); ;} break; case 121: -#line 521 "perly.y" +#line 530 "perly.y" { yyval.opval = newUNOP(OP_COMPLEMENT, 0, scalar(yyvsp[0].opval));;} break; case 122: -#line 523 "perly.y" +#line 532 "perly.y" { yyval.opval = newUNOP(OP_POSTINC, 0, mod(scalar(yyvsp[-1].opval), OP_POSTINC)); ;} break; case 123: -#line 526 "perly.y" +#line 535 "perly.y" { yyval.opval = newUNOP(OP_POSTDEC, 0, mod(scalar(yyvsp[-1].opval), OP_POSTDEC)); ;} break; case 124: -#line 529 "perly.y" +#line 538 "perly.y" { yyval.opval = newUNOP(OP_PREINC, 0, mod(scalar(yyvsp[0].opval), OP_PREINC)); ;} break; case 125: -#line 532 "perly.y" +#line 541 "perly.y" { yyval.opval = newUNOP(OP_PREDEC, 0, mod(scalar(yyvsp[0].opval), OP_PREDEC)); ;} break; case 126: -#line 539 "perly.y" +#line 548 "perly.y" { yyval.opval = newANONLIST(yyvsp[-1].opval); ;} break; case 127: -#line 541 "perly.y" +#line 550 "perly.y" { yyval.opval = newANONLIST(Nullop); ;} break; case 128: -#line 543 "perly.y" +#line 552 "perly.y" { yyval.opval = newANONHASH(yyvsp[-2].opval); ;} break; case 129: -#line 545 "perly.y" +#line 554 "perly.y" { yyval.opval = newANONHASH(Nullop); ;} break; case 130: -#line 547 "perly.y" +#line 556 "perly.y" { yyval.opval = newANONATTRSUB(yyvsp[-3].ival, yyvsp[-2].opval, yyvsp[-1].opval, yyvsp[0].opval); ;} break; case 131: -#line 553 "perly.y" +#line 562 "perly.y" { yyval.opval = dofile(yyvsp[0].opval); ;} break; case 132: -#line 555 "perly.y" +#line 564 "perly.y" { yyval.opval = newUNOP(OP_NULL, OPf_SPECIAL, scope(yyvsp[0].opval)); ;} break; case 133: -#line 557 "perly.y" +#line 566 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, prepend_elem(OP_LIST, @@ -715,7 +715,7 @@ case 2: break; case 134: -#line 565 "perly.y" +#line 574 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, append_elem(OP_LIST, @@ -727,14 +727,14 @@ case 2: break; case 135: -#line 574 "perly.y" +#line 583 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, prepend_elem(OP_LIST, scalar(newCVREF(0,scalar(yyvsp[-2].opval))), Nullop)); dep();;} break; case 136: -#line 578 "perly.y" +#line 587 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, prepend_elem(OP_LIST, yyvsp[-1].opval, @@ -742,77 +742,77 @@ case 2: break; case 141: -#line 590 "perly.y" +#line 599 "perly.y" { yyval.opval = newCONDOP(0, yyvsp[-4].opval, yyvsp[-2].opval, yyvsp[0].opval); ;} break; case 142: -#line 592 "perly.y" +#line 601 "perly.y" { yyval.opval = newUNOP(OP_REFGEN, 0, mod(yyvsp[0].opval,OP_REFGEN)); ;} break; case 143: -#line 594 "perly.y" +#line 603 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 144: -#line 596 "perly.y" +#line 605 "perly.y" { yyval.opval = localize(yyvsp[0].opval,yyvsp[-1].ival); ;} break; case 145: -#line 598 "perly.y" +#line 607 "perly.y" { yyval.opval = sawparens(yyvsp[-1].opval); ;} break; case 146: -#line 600 "perly.y" +#line 609 "perly.y" { yyval.opval = sawparens(newNULLLIST()); ;} break; case 147: -#line 602 "perly.y" +#line 611 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 148: -#line 604 "perly.y" +#line 613 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 149: -#line 606 "perly.y" +#line 615 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 150: -#line 608 "perly.y" +#line 617 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 151: -#line 610 "perly.y" +#line 619 "perly.y" { yyval.opval = newUNOP(OP_AV2ARYLEN, 0, ref(yyvsp[0].opval, OP_AV2ARYLEN));;} break; case 152: -#line 612 "perly.y" +#line 621 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 153: -#line 614 "perly.y" +#line 623 "perly.y" { yyval.opval = newSLICEOP(0, yyvsp[-1].opval, yyvsp[-4].opval); ;} break; case 154: -#line 616 "perly.y" +#line 625 "perly.y" { yyval.opval = newSLICEOP(0, yyvsp[-1].opval, Nullop); ;} break; case 155: -#line 618 "perly.y" +#line 627 "perly.y" { yyval.opval = prepend_elem(OP_ASLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_ASLICE, 0, @@ -821,7 +821,7 @@ case 2: break; case 156: -#line 624 "perly.y" +#line 633 "perly.y" { yyval.opval = prepend_elem(OP_HSLICE, newOP(OP_PUSHMARK, 0), newLISTOP(OP_HSLICE, 0, @@ -831,217 +831,217 @@ case 2: break; case 157: -#line 631 "perly.y" +#line 640 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 158: -#line 633 "perly.y" +#line 642 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, 0, scalar(yyvsp[0].opval)); ;} break; case 159: -#line 635 "perly.y" +#line 644 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar(yyvsp[-2].opval)); ;} break; case 160: -#line 637 "perly.y" +#line 646 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, yyvsp[-1].opval, scalar(yyvsp[-3].opval))); ;} break; case 161: -#line 640 "perly.y" +#line 649 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, yyvsp[0].opval, scalar(yyvsp[-1].opval))); ;} break; case 162: -#line 643 "perly.y" +#line 652 "perly.y" { yyval.opval = newOP(yyvsp[0].ival, OPf_SPECIAL); PL_hints |= HINT_BLOCK_SCOPE; ;} break; case 163: -#line 646 "perly.y" +#line 655 "perly.y" { yyval.opval = newLOOPEX(yyvsp[-1].ival,yyvsp[0].opval); ;} break; case 164: -#line 648 "perly.y" +#line 657 "perly.y" { yyval.opval = newUNOP(OP_NOT, 0, scalar(yyvsp[0].opval)); ;} break; case 165: -#line 650 "perly.y" +#line 659 "perly.y" { yyval.opval = newOP(yyvsp[0].ival, 0); ;} break; case 166: -#line 652 "perly.y" +#line 661 "perly.y" { yyval.opval = newUNOP(yyvsp[-1].ival, 0, yyvsp[0].opval); ;} break; case 167: -#line 654 "perly.y" +#line 663 "perly.y" { yyval.opval = newUNOP(yyvsp[-1].ival, 0, yyvsp[0].opval); ;} break; case 168: -#line 656 "perly.y" +#line 665 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, append_elem(OP_LIST, yyvsp[0].opval, scalar(yyvsp[-1].opval))); ;} break; case 169: -#line 659 "perly.y" +#line 668 "perly.y" { yyval.opval = newOP(yyvsp[0].ival, 0); ;} break; case 170: -#line 661 "perly.y" +#line 670 "perly.y" { yyval.opval = newOP(yyvsp[-2].ival, 0); ;} break; case 171: -#line 663 "perly.y" +#line 672 "perly.y" { yyval.opval = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar(yyvsp[0].opval)); ;} break; case 172: -#line 666 "perly.y" +#line 675 "perly.y" { yyval.opval = newOP(yyvsp[-2].ival, OPf_SPECIAL); ;} break; case 173: -#line 668 "perly.y" +#line 677 "perly.y" { yyval.opval = newUNOP(yyvsp[-3].ival, 0, yyvsp[-1].opval); ;} break; case 174: -#line 670 "perly.y" +#line 679 "perly.y" { yyval.opval = pmruntime(yyvsp[-3].opval, yyvsp[-1].opval, Nullop); ;} break; case 175: -#line 672 "perly.y" +#line 681 "perly.y" { yyval.opval = pmruntime(yyvsp[-5].opval, yyvsp[-3].opval, yyvsp[-1].opval); ;} break; case 178: -#line 679 "perly.y" +#line 688 "perly.y" { yyval.opval = my_attrs(yyvsp[-1].opval,yyvsp[0].opval); ;} break; case 179: -#line 681 "perly.y" +#line 690 "perly.y" { yyval.opval = localize(yyvsp[0].opval,yyvsp[-1].ival); ;} break; case 180: -#line 686 "perly.y" +#line 695 "perly.y" { yyval.opval = sawparens(yyvsp[-1].opval); ;} break; case 181: -#line 688 "perly.y" +#line 697 "perly.y" { yyval.opval = sawparens(newNULLLIST()); ;} break; case 182: -#line 690 "perly.y" +#line 699 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 183: -#line 692 "perly.y" +#line 701 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 184: -#line 694 "perly.y" +#line 703 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 185: -#line 699 "perly.y" +#line 708 "perly.y" { yyval.opval = Nullop; ;} break; case 186: -#line 701 "perly.y" +#line 710 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 187: -#line 705 "perly.y" +#line 714 "perly.y" { yyval.opval = Nullop; ;} break; case 188: -#line 707 "perly.y" +#line 716 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; case 189: -#line 709 "perly.y" +#line 718 "perly.y" { yyval.opval = yyvsp[-1].opval; ;} break; case 190: -#line 715 "perly.y" +#line 724 "perly.y" { PL_in_my = 0; yyval.opval = my(yyvsp[0].opval); ;} break; case 191: -#line 719 "perly.y" +#line 728 "perly.y" { yyval.opval = newCVREF(yyvsp[-1].ival,yyvsp[0].opval); ;} break; case 192: -#line 723 "perly.y" +#line 732 "perly.y" { yyval.opval = newSVREF(yyvsp[0].opval); ;} break; case 193: -#line 727 "perly.y" +#line 736 "perly.y" { yyval.opval = newAVREF(yyvsp[0].opval); ;} break; case 194: -#line 731 "perly.y" +#line 740 "perly.y" { yyval.opval = newHVREF(yyvsp[0].opval); ;} break; case 195: -#line 735 "perly.y" +#line 744 "perly.y" { yyval.opval = newAVREF(yyvsp[0].opval); ;} break; case 196: -#line 739 "perly.y" +#line 748 "perly.y" { yyval.opval = newGVREF(0,yyvsp[0].opval); ;} break; case 197: -#line 744 "perly.y" +#line 753 "perly.y" { yyval.opval = scalar(yyvsp[0].opval); ;} break; case 198: -#line 746 "perly.y" +#line 755 "perly.y" { yyval.opval = scalar(yyvsp[0].opval); ;} break; case 199: -#line 748 "perly.y" +#line 757 "perly.y" { yyval.opval = scope(yyvsp[0].opval); ;} break; case 200: -#line 751 "perly.y" +#line 760 "perly.y" { yyval.opval = yyvsp[0].opval; ;} break; @@ -164,7 +164,7 @@ #endif /* PERL_CORE */ #if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -#line 21 "perly.y" +#line 30 "perly.y" typedef union YYSTYPE { I32 ival; char *pval; @@ -163,27 +163,27 @@ static const short yyrhs[] = /* YYRLINE[YYN] -- source line where rule number YYN was defined. */ static const unsigned short yyrline[] = { - 0, 86, 86, 92, 99, 103, 109, 116, 120, 124, - 125, 127, 136, 138, 139, 148, 154, 156, 158, 160, - 162, 164, 166, 173, 174, 176, 183, 187, 195, 196, - 201, 207, 213, 216, 220, 223, 239, 247, 248, 253, - 254, 258, 263, 267, 271, 275, 281, 282, 286, 288, - 290, 292, 294, 298, 302, 303, 307, 312, 317, 321, - 325, 329, 338, 339, 344, 345, 347, 352, 354, 359, - 360, 363, 368, 367, 374, 376, 378, 380, 384, 386, - 388, 392, 395, 398, 403, 407, 412, 417, 419, 422, - 421, 430, 431, 435, 440, 442, 446, 450, 453, 458, - 463, 466, 471, 475, 481, 483, 485, 489, 491, 493, - 495, 497, 499, 501, 503, 505, 507, 509, 514, 516, - 518, 520, 522, 525, 528, 531, 538, 540, 542, 544, - 546, 552, 554, 556, 564, 573, 577, 585, 586, 587, - 588, 589, 591, 593, 595, 597, 599, 601, 603, 605, - 607, 609, 611, 613, 615, 617, 623, 630, 632, 634, - 636, 639, 642, 645, 647, 649, 651, 653, 655, 658, - 660, 662, 665, 667, 669, 671, 673, 674, 678, 680, - 685, 687, 689, 691, 693, 698, 700, 705, 706, 708, - 714, 718, 722, 726, 730, 734, 738, 743, 745, 747, - 750 + 0, 95, 95, 101, 108, 112, 118, 125, 129, 133, + 134, 136, 145, 147, 148, 157, 163, 165, 167, 169, + 171, 173, 175, 182, 183, 185, 192, 196, 204, 205, + 210, 216, 222, 225, 229, 232, 248, 256, 257, 262, + 263, 267, 272, 276, 280, 284, 290, 291, 295, 297, + 299, 301, 303, 307, 311, 312, 316, 321, 326, 330, + 334, 338, 347, 348, 353, 354, 356, 361, 363, 368, + 369, 372, 377, 376, 383, 385, 387, 389, 393, 395, + 397, 401, 404, 407, 412, 416, 421, 426, 428, 431, + 430, 439, 440, 444, 449, 451, 455, 459, 462, 467, + 472, 475, 480, 484, 490, 492, 494, 498, 500, 502, + 504, 506, 508, 510, 512, 514, 516, 518, 523, 525, + 527, 529, 531, 534, 537, 540, 547, 549, 551, 553, + 555, 561, 563, 565, 573, 582, 586, 594, 595, 596, + 597, 598, 600, 602, 604, 606, 608, 610, 612, 614, + 616, 618, 620, 622, 624, 626, 632, 639, 641, 643, + 645, 648, 651, 654, 656, 658, 660, 662, 664, 667, + 669, 671, 674, 676, 678, 680, 682, 683, 687, 689, + 694, 696, 698, 700, 702, 707, 709, 714, 715, 717, + 723, 727, 731, 735, 739, 743, 747, 752, 754, 756, + 759 }; #endif @@ -12,6 +12,15 @@ * All that is gold does not glitter, not all those who wander are lost.' */ +/* This file holds the grammar for the Perl language. If edited, you need + * to run regen_perly.pl, which re-creates the files perly.h, perly.tab + * and perly.act which are derived from this. + * + * The main job of of this grammar is to call the various newFOO() + * functions in op.c to build a syntax tree of OP structs. + * It relies in the lexer in toke.c to do the tokenizing. + */ + /* Make the parser re-entrant. */ %pure_parser @@ -13,6 +13,13 @@ * and no knowing what you'll find around a corner. And Elves, sir!" --Samwise */ +/* This file contains general pp ("push/pop") functions that execute the + * opcodes that make up a perl program. A typical pp function expects to + * find its arguments on the stack, and usually pushes its results onto + * the stack, hence the 'pp' terminology. Each OP structure contains + * a pointer to the relevant pp_foo() function. + */ + #include "EXTERN.h" #define PERL_IN_PP_C #include "perl.h" @@ -17,6 +17,17 @@ * And whither then? I cannot say. */ +/* This file contains control-oriented pp ("push/pop") functions that + * execute the opcodes that make up a perl program. A typical pp function + * expects to find its arguments on the stack, and usually pushes its + * results onto the stack, hence the 'pp' terminology. Each OP structure + * contains a pointer to the relevant pp_foo() function. + * + * Control-oriented means things like pp_enteriter() and pp_next(), which + * alter the flow of control of the program. + */ + + #include "EXTERN.h" #define PERL_IN_PP_CTL_C #include "perl.h" @@ -16,6 +16,19 @@ * Fire, Foes! Awake! */ +/* This file contains 'hot' pp ("push/pop") functions that + * execute the opcodes that make up a perl program. A typical pp function + * expects to find its arguments on the stack, and usually pushes its + * results onto the stack, hence the 'pp' terminology. Each OP structure + * contains a pointer to the relevant pp_foo() function. + * + * By 'hot', we mean common ops whose execution speed is critical. + * By gathering them together into a single file, we encourage + * CPU cache hits on hot code. Also it could be taken as a warning not to + * change any code in this file unless you're sure it won't affect + * performance. + */ + #include "EXTERN.h" #define PERL_IN_PP_HOT_C #include "perl.h" @@ -16,6 +16,17 @@ * some salt. */ +/* This file contains pp ("push/pop") functions that + * execute the opcodes that make up a perl program. A typical pp function + * expects to find its arguments on the stack, and usually pushes its + * results onto the stack, hence the 'pp' terminology. Each OP structure + * contains a pointer to the relevant pp_foo() function. + * + * This particular file just contains pp_pack() and pp_unpack(). See the + * other pp*.c files for the rest of the pp_ functions. + */ + + #include "EXTERN.h" #define PERL_IN_PP_PACK_C #include "perl.h" @@ -13,6 +13,17 @@ * rear!' the slave-driver shouted. 'Three files up. And stay there... */ +/* This file contains pp ("push/pop") functions that + * execute the opcodes that make up a perl program. A typical pp function + * expects to find its arguments on the stack, and usually pushes its + * results onto the stack, hence the 'pp' terminology. Each OP structure + * contains a pointer to the relevant pp_foo() function. + * + * This particular file just contains pp_sort(), which is complex + * enough to merit its own file! See the other pp*.c files for the rest of + * the pp_ functions. + */ + #include "EXTERN.h" #define PERL_IN_PP_SORT_C #include "perl.h" @@ -15,6 +15,15 @@ * a rumour and a trouble as of great engines throbbing and labouring. */ +/* This file contains system pp ("push/pop") functions that + * execute the opcodes that make up a perl program. A typical pp function + * expects to find its arguments on the stack, and usually pushes its + * results onto the stack, hence the 'pp' terminology. Each OP structure + * contains a pointer to the relevant pp_foo() function. + * + * By 'system', we mean ops which interact with the OS, such as pp_open(). + */ + #include "EXTERN.h" #define PERL_IN_PP_SYS_C #include "perl.h" @@ -5,6 +5,11 @@ * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee */ +/* This file contains functions for compiling a regular expresssion. See + * also regexec.c which funnnily enough, contains functions for executing + * a regular expression. + */ + /* NOTE: this is derived from Henry Spencer's regexp code, and should not * confused with the original package (see point 3 below). Thanks, Henry! */ @@ -5,6 +5,11 @@ * "One Ring to rule them all, One Ring to find them..." */ +/* This file contains functions for executing a regular expresssion. See + * also regcomp.c which funnnily enough, contains functions for compiling + * a regular expression. + */ + /* NOTE: this is derived from Henry Spencer's regexp code, and should not * confused with the original package (see point 3 below). Thanks, Henry! */ @@ -8,6 +8,19 @@ * */ +/* This file contains the main Perl opcode execution loop. It just + * calls the pp_foo() function associated with each op, and expects that + * function to return a pointer to the next op to be executed, or null if + * its the end of the sub or program or whatever. + * + * There is a similar loop in dump.c, Perl_runops_debug(), which does + * the same, but also checks for various debug flags each time round the + * loop. + * + * Why this function requires a file all of its own is anybody's guess. + * DAPM. + */ + #include "EXTERN.h" #define PERL_IN_RUN_C #include "perl.h" @@ -13,6 +13,13 @@ * levels..." */ +/* This function contains functions to manipluate various of perl's stacks; + * in particular it contains code to push various types of things onto + * the savestack, then to pop them off and perform the correct restorative + * action for each one. This corresponds to the cleanup Perl does at + * each scope exit. + */ + #include "EXTERN.h" #define PERL_IN_SCOPE_C #include "perl.h" @@ -14,6 +14,9 @@ * liar, Saruman, and a corrupter of men's hearts." --Theoden */ +/* This file contains a few functions for handling data tainting in Perl + */ + #include "EXTERN.h" #define PERL_IN_TAINT_C #include "perl.h" diff --git a/universal.c b/universal.c index ef4d95badd..caab476386 100644 --- a/universal.c +++ b/universal.c @@ -14,6 +14,10 @@ * beginning." --Gandalf, relating Gollum's story */ +/* This file contains the code that implements the functions in Perl's + * UNIVERSAL package, such as UNIVERSAL->can(). + */ + #include "EXTERN.h" #define PERL_IN_UNIVERSAL_C #include "perl.h" @@ -29,6 +29,11 @@ static char unees[] = "Malformed UTF-8 character (unexpected end of string)"; /* =head1 Unicode Support +This file contains various utility functions for manipulating UTF8-encoded +strings. For the uninitiated, this is a method of representing arbitrary +Unicde characters as a variable number of bytes, in such a way that +characters in the ASCII range are unmodifed, and a zero byte never appears. + =for apidoc A|U8 *|uvuni_to_utf8_flags|U8 *d|UV uv|UV flags Adds the UTF-8 representation of the Unicode codepoint C<uv> to the end @@ -13,6 +13,12 @@ * not content." --Gandalf */ +/* This file contains assorted utility routines. + * Which is a polite way of saying any stuff that people couldn't think of + * a better place for. Amongst other things, it includes the warning and + * dieing stuff, plus wrappers for malloc code. + */ + #include "EXTERN.h" #define PERL_IN_UTIL_C #include "perl.h" |