--- /dev/null
+/* stolen_chunk_of_toke.c - from perl 5.8.8 toke.c
+ *
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+/*
+ * "It all comes from here, the stench and the peril." --Frodo
+ */
+
+/*
+ * this is all blatantly stolen. I sincerely hopes it doesn't fuck anything
+ * up but if it does blame me (Matt S Trout), not the poor original authors
+ */
+
+/* the following #defines are stolen from assorted headers, not toke.c */
+
+#define DPTR2FPTR(t,p) ((t)PTR2nat(p)) /* data pointer to function pointer */
+#define FPTR2DPTR(t,p) ((t)PTR2nat(p)) /* function pointer to data pointer */
+#define MEM_WRAP_CHECK_(n,t) MEM_WRAP_CHECK(n,t),
+#define Newx(v,n,t) (v = (MEM_WRAP_CHECK_(n,t) (t*)safemalloc((MEM_SIZE)((n)*sizeof(t)))))
+
+
+#define LEX_NORMAL 10 /* normal code (ie not within "...") */
+#define LEX_INTERPNORMAL 9 /* code within a string, eg "$foo[$x+1]" */
+#define LEX_INTERPCASEMOD 8 /* expecting a \U, \Q or \E etc */
+#define LEX_INTERPPUSH 7 /* starting a new sublex parse level */
+#define LEX_INTERPSTART 6 /* expecting the start of a $var */
+
+ /* at end of code, eg "$x" followed by: */
+#define LEX_INTERPEND 5 /* ... eg not one of [, { or -> */
+#define LEX_INTERPENDMAYBE 4 /* ... eg one of [, { or -> */
+
+#define LEX_INTERPCONCAT 3 /* expecting anything, eg at start of
+ string or after \E, $foo, etc */
+#define LEX_INTERPCONST 2 /* NOT USED */
+#define LEX_FORMLINE 1 /* expecting a format line */
+#define LEX_KNOWNEXT 0 /* next token known; just return it */
+
+static const char ident_too_long[] =
+ "Identifier too long";
+static const char c_without_g[] =
+ "Use of /c modifier is meaningless without /g";
+static const char c_in_subst[] =
+ "Use of /c modifier is meaningless in s///";
+
+#ifdef USE_UTF8_SCRIPTS
+# define UTF (!IN_BYTES)
+#else
+# define UTF ((PL_linestr && DO_UTF8(PL_linestr)) || (PL_hints & HINT_UTF8))
+#endif
+
+/* Invoke the idxth filter function for the current rsfp. */
+/* maxlen 0 = read one text line */
+I32
+Perl_filter_read(pTHX_ int idx, SV *buf_sv, int maxlen)
+{
+ filter_t funcp;
+ SV *datasv = NULL;
+
+ if (!PL_rsfp_filters)
+ return -1;
+ if (idx > AvFILLp(PL_rsfp_filters)) { /* Any more filters? */
+ /* Provide a default input filter to make life easy. */
+ /* Note that we append to the line. This is handy. */
+ DEBUG_P(PerlIO_printf(Perl_debug_log,
+ "filter_read %d: from rsfp\n", idx));
+ if (maxlen) {
+ /* Want a block */
+ int len ;
+ const int old_len = SvCUR(buf_sv);
+
+ /* ensure buf_sv is large enough */
+ SvGROW(buf_sv, (STRLEN)(old_len + maxlen)) ;
+ if ((len = PerlIO_read(PL_rsfp, SvPVX(buf_sv) + old_len, maxlen)) <= 0){
+ if (PerlIO_error(PL_rsfp))
+ return -1; /* error */
+ else
+ return 0 ; /* end of file */
+ }
+ SvCUR_set(buf_sv, old_len + len) ;
+ } else {
+ /* Want a line */
+ if (sv_gets(buf_sv, PL_rsfp, SvCUR(buf_sv)) == NULL) {
+ if (PerlIO_error(PL_rsfp))
+ return -1; /* error */
+ else
+ return 0 ; /* end of file */
+ }
+ }
+ return SvCUR(buf_sv);
+ }
+ /* Skip this filter slot if filter has been deleted */
+ if ( (datasv = FILTER_DATA(idx)) == &PL_sv_undef) {
+ DEBUG_P(PerlIO_printf(Perl_debug_log,
+ "filter_read %d: skipped (filter deleted)\n",
+ idx));
+ return FILTER_READ(idx+1, buf_sv, maxlen); /* recurse */
+ }
+ /* Get function pointer hidden within datasv */
+ funcp = DPTR2FPTR(filter_t, IoANY(datasv));
+ DEBUG_P(PerlIO_printf(Perl_debug_log,
+ "filter_read %d: via function %p (%s)\n",
+ idx, datasv, SvPV_nolen_const(datasv)));
+ /* Call function. The function is expected to */
+ /* call "FILTER_READ(idx+1, buf_sv)" first. */
+ /* Return: <0:error, =0:eof, >0:not eof */
+ return (*funcp)(aTHX_ idx, buf_sv, maxlen);
+}
+
+STATIC char *
+S_filter_gets(pTHX_ register SV *sv, register PerlIO *fp, STRLEN append)
+{
+#ifdef PERL_CR_FILTER
+ if (!PL_rsfp_filters) {
+ filter_add(S_cr_textfilter,NULL);
+ }
+#endif
+ if (PL_rsfp_filters) {
+ if (!append)
+ SvCUR_set(sv, 0); /* start with empty line */
+ if (FILTER_READ(0, sv, 0) > 0)
+ return ( SvPVX(sv) ) ;
+ else
+ return Nullch ;
+ }
+ else
+ return (sv_gets(sv, fp, append));
+}
+
+/*
+ * S_skipspace
+ * Called to gobble the appropriate amount and type of whitespace.
+ * Skips comments as well.
+ */
+
+STATIC char *
+S_skipspace(pTHX_ register char *s)
+{
+ if (PL_lex_formbrack && PL_lex_brackets <= PL_lex_formbrack) {
+ while (s < PL_bufend && SPACE_OR_TAB(*s))
+ s++;
+ return s;
+ }
+ for (;;) {
+ STRLEN prevlen;
+ SSize_t oldprevlen, oldoldprevlen;
+ SSize_t oldloplen = 0, oldunilen = 0;
+ while (s < PL_bufend && isSPACE(*s)) {
+ if (*s++ == '\n' && PL_in_eval && !PL_rsfp)
+ incline(s);
+ }
+
+ /* comment */
+ if (s < PL_bufend && *s == '#') {
+ while (s < PL_bufend && *s != '\n')
+ s++;
+ if (s < PL_bufend) {
+ s++;
+ if (PL_in_eval && !PL_rsfp) {
+ incline(s);
+ continue;
+ }
+ }
+ }
+
+ /* only continue to recharge the buffer if we're at the end
+ * of the buffer, we're not reading from a source filter, and
+ * we're in normal lexing mode
+ */
+ if (s < PL_bufend || !PL_rsfp || PL_sublex_info.sub_inwhat ||
+ PL_lex_state == LEX_FORMLINE)
+ return s;
+
+ /* try to recharge the buffer */
+ if ((s = filter_gets(PL_linestr, PL_rsfp,
+ (prevlen = SvCUR(PL_linestr)))) == Nullch)
+ {
+ /* end of file. Add on the -p or -n magic */
+ if (PL_minus_p) {
+ sv_setpv(PL_linestr,
+ ";}continue{print or die qq(-p destination: $!\\n);}");
+ PL_minus_n = PL_minus_p = 0;
+ }
+ else if (PL_minus_n) {
+ sv_setpvn(PL_linestr, ";}", 2);
+ PL_minus_n = 0;
+ }
+ else
+ sv_setpvn(PL_linestr,";", 1);
+
+ /* reset variables for next time we lex */
+ PL_oldoldbufptr = PL_oldbufptr = PL_bufptr = s = PL_linestart
+ = SvPVX(PL_linestr);
+ PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
+ PL_last_lop = PL_last_uni = Nullch;
+
+ /* Close the filehandle. Could be from -P preprocessor,
+ * STDIN, or a regular file. If we were reading code from
+ * STDIN (because the commandline held no -e or filename)
+ * then we don't close it, we reset it so the code can
+ * read from STDIN too.
+ */
+
+ if (PL_preprocess && !PL_in_eval)
+ (void)PerlProc_pclose(PL_rsfp);
+ else if ((PerlIO*)PL_rsfp == PerlIO_stdin())
+ PerlIO_clearerr(PL_rsfp);
+ else
+ (void)PerlIO_close(PL_rsfp);
+ PL_rsfp = Nullfp;
+ return s;
+ }
+
+ /* not at end of file, so we only read another line */
+ /* make corresponding updates to old pointers, for yyerror() */
+ oldprevlen = PL_oldbufptr - PL_bufend;
+ oldoldprevlen = PL_oldoldbufptr - PL_bufend;
+ if (PL_last_uni)
+ oldunilen = PL_last_uni - PL_bufend;
+ if (PL_last_lop)
+ oldloplen = PL_last_lop - PL_bufend;
+ PL_linestart = PL_bufptr = s + prevlen;
+ PL_bufend = s + SvCUR(PL_linestr);
+ s = PL_bufptr;
+ PL_oldbufptr = s + oldprevlen;
+ PL_oldoldbufptr = s + oldoldprevlen;
+ if (PL_last_uni)
+ PL_last_uni = s + oldunilen;
+ if (PL_last_lop)
+ PL_last_lop = s + oldloplen;
+ incline(s);
+
+ /* debugger active and we're not compiling the debugger code,
+ * so store the line into the debugger's array of lines
+ */
+ if (PERLDB_LINE && PL_curstash != PL_debstash) {
+ SV * const sv = NEWSV(85,0);
+
+ sv_upgrade(sv, SVt_PVMG);
+ sv_setpvn(sv,PL_bufptr,PL_bufend-PL_bufptr);
+ (void)SvIOK_on(sv);
+ SvIV_set(sv, 0);
+ av_store(CopFILEAV(PL_curcop),(I32)CopLINE(PL_curcop),sv);
+ }
+ }
+}
+
+STATIC char *
+S_scan_word(pTHX_ register char *s, char *dest, STRLEN destlen, int allow_package, STRLEN *slp)
+{
+ register char *d = dest;
+ register char * const e = d + destlen - 3; /* two-character token, ending NUL */
+ for (;;) {
+ if (d >= e)
+ Perl_croak(aTHX_ ident_too_long);
+ if (isALNUM(*s)) /* UTF handled below */
+ *d++ = *s++;
+ else if (*s == '\'' && allow_package && isIDFIRST_lazy_if(s+1,UTF)) {
+ *d++ = ':';
+ *d++ = ':';
+ s++;
+ }
+ else if (*s == ':' && s[1] == ':' && allow_package && s[2] != '$') {
+ *d++ = *s++;
+ *d++ = *s++;
+ }
+ else if (UTF && UTF8_IS_START(*s) && isALNUM_utf8((U8*)s)) {
+ char *t = s + UTF8SKIP(s);
+ while (UTF8_IS_CONTINUED(*t) && is_utf8_mark((U8*)t))
+ t += UTF8SKIP(t);
+ if (d + (t - s) > e)
+ Perl_croak(aTHX_ ident_too_long);
+ Copy(s, d, t - s, char);
+ d += t - s;
+ s = t;
+ }
+ else {
+ *d = '\0';
+ *slp = d - dest;
+ return s;
+ }
+ }
+}
+
+/*
+ * S_incline
+ * This subroutine has nothing to do with tilting, whether at windmills
+ * or pinball tables. Its name is short for "increment line". It
+ * increments the current line number in CopLINE(PL_curcop) and checks
+ * to see whether the line starts with a comment of the form
+ * # line 500 "foo.pm"
+ * If so, it sets the current line number and file to the values in the comment.
+ */
+
+STATIC void
+S_incline(pTHX_ char *s)
+{
+ char *t;
+ char *n;
+ char *e;
+ char ch;
+
+ CopLINE_inc(PL_curcop);
+ if (*s++ != '#')
+ return;
+ while (SPACE_OR_TAB(*s)) s++;
+ if (strnEQ(s, "line", 4))
+ s += 4;
+ else
+ return;
+ if (SPACE_OR_TAB(*s))
+ s++;
+ else
+ return;
+ while (SPACE_OR_TAB(*s)) s++;
+ if (!isDIGIT(*s))
+ return;
+ n = s;
+ while (isDIGIT(*s))
+ s++;
+ while (SPACE_OR_TAB(*s))
+ s++;
+ if (*s == '"' && (t = strchr(s+1, '"'))) {
+ s++;
+ e = t + 1;
+ }
+ else {
+ for (t = s; !isSPACE(*t); t++) ;
+ e = t;
+ }
+ while (SPACE_OR_TAB(*e) || *e == '\r' || *e == '\f')
+ e++;
+ if (*e != '\n' && *e != '\0')
+ return; /* false alarm */
+
+ ch = *t;
+ *t = '\0';
+ if (t - s > 0) {
+#ifndef USE_ITHREADS
+ const char *cf = CopFILE(PL_curcop);
+ if (cf && strlen(cf) > 7 && strnEQ(cf, "(eval ", 6)) {
+ /* must copy *{"::_<(eval N)[oldfilename:L]"}
+ * to *{"::_<newfilename"} */
+ char smallbuf[256], smallbuf2[256];
+ char *tmpbuf, *tmpbuf2;
+ GV **gvp, *gv2;
+ STRLEN tmplen = strlen(cf);
+ STRLEN tmplen2 = strlen(s);
+ if (tmplen + 3 < sizeof smallbuf)
+ tmpbuf = smallbuf;
+ else
+ Newx(tmpbuf, tmplen + 3, char);
+ if (tmplen2 + 3 < sizeof smallbuf2)
+ tmpbuf2 = smallbuf2;
+ else
+ Newx(tmpbuf2, tmplen2 + 3, char);
+ tmpbuf[0] = tmpbuf2[0] = '_';
+ tmpbuf[1] = tmpbuf2[1] = '<';
+ memcpy(tmpbuf + 2, cf, ++tmplen);
+ memcpy(tmpbuf2 + 2, s, ++tmplen2);
+ ++tmplen; ++tmplen2;
+ gvp = (GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, FALSE);
+ if (gvp) {
+ gv2 = *(GV**)hv_fetch(PL_defstash, tmpbuf2, tmplen2, TRUE);
+ if (!isGV(gv2))
+ gv_init(gv2, PL_defstash, tmpbuf2, tmplen2, FALSE);
+ /* adjust ${"::_<newfilename"} to store the new file name */
+ GvSV(gv2) = newSVpvn(tmpbuf2 + 2, tmplen2 - 2);
+ GvHV(gv2) = (HV*)SvREFCNT_inc(GvHV(*gvp));
+ GvAV(gv2) = (AV*)SvREFCNT_inc(GvAV(*gvp));
+ }
+ if (tmpbuf != smallbuf) Safefree(tmpbuf);
+ if (tmpbuf2 != smallbuf2) Safefree(tmpbuf2);
+ }
+#endif
+ CopFILE_free(PL_curcop);
+ CopFILE_set(PL_curcop, s);
+ }
+ *t = ch;
+ CopLINE_set(PL_curcop, atoi(n)-1);
+}
projects / p5sagit/Devel-Declare.git / commitdiff