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authorWilliam Joye <wjoye@cfa.harvard.edu>2017-09-22 18:51:12 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2017-09-22 18:51:12 (GMT)
commit3fa8e6dc88e8041b6cb88d1b1e9c05676d3346b7 (patch)
tree69afbb41089c8358615879f7cd3c4cf7997f4c7e /tcl8.6/generic/regguts.h
parenta0e17db23c0fd7c771c0afce8cce350c98f90b02 (diff)
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update to tcl/tk 8.6.7
Diffstat (limited to 'tcl8.6/generic/regguts.h')
-rw-r--r--tcl8.6/generic/regguts.h453
1 files changed, 0 insertions, 453 deletions
diff --git a/tcl8.6/generic/regguts.h b/tcl8.6/generic/regguts.h
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-/*
- * Internal interface definitions, etc., for the reg package
- *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
- *
- * Development of this software was funded, in part, by Cray Research Inc.,
- * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
- * Corporation, none of whom are responsible for the results. The author
- * thanks all of them.
- *
- * Redistribution and use in source and binary forms -- with or without
- * modification -- are permitted for any purpose, provided that
- * redistributions in source form retain this entire copyright notice and
- * indicate the origin and nature of any modifications.
- *
- * I'd appreciate being given credit for this package in the documentation of
- * software which uses it, but that is not a requirement.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Environmental customization. It should not (I hope) be necessary to alter
- * the file you are now reading -- regcustom.h should handle it all, given
- * care here and elsewhere.
- */
-#include "regcustom.h"
-
-/*
- * Things that regcustom.h might override.
- */
-
-/* assertions */
-#ifndef assert
-#ifndef REG_DEBUG
-#ifndef NDEBUG
-#define NDEBUG /* no assertions */
-#endif
-#endif /* !REG_DEBUG */
-#include <assert.h>
-#endif
-
-/* voids */
-#ifndef VOID
-#define VOID void /* for function return values */
-#endif
-#ifndef DISCARD
-#define DISCARD void /* for throwing values away */
-#endif
-#ifndef PVOID
-#define PVOID void * /* generic pointer */
-#endif
-#ifndef VS
-#define VS(x) ((void*)(x)) /* cast something to generic ptr */
-#endif
-#ifndef NOPARMS
-#define NOPARMS void /* for empty parm lists */
-#endif
-
-/* function-pointer declarator */
-#ifndef FUNCPTR
-#if __STDC__ >= 1
-#define FUNCPTR(name, args) (*name)args
-#else
-#define FUNCPTR(name, args) (*name)()
-#endif
-#endif
-
-/* memory allocation */
-#ifndef MALLOC
-#define MALLOC(n) malloc(n)
-#endif
-#ifndef REALLOC
-#define REALLOC(p, n) realloc(VS(p), n)
-#endif
-#ifndef FREE
-#define FREE(p) free(VS(p))
-#endif
-
-/* want size of a char in bits, and max value in bounded quantifiers */
-#ifndef _POSIX2_RE_DUP_MAX
-#define _POSIX2_RE_DUP_MAX 255 /* normally from <limits.h> */
-#endif
-
-/*
- * misc
- */
-
-#define NOTREACHED 0
-#define xxx 1
-
-#define DUPMAX _POSIX2_RE_DUP_MAX
-#define DUPINF (DUPMAX+1)
-
-#define REMAGIC 0xfed7 /* magic number for main struct */
-
-/*
- * debugging facilities
- */
-#ifdef REG_DEBUG
-/* FDEBUG does finite-state tracing */
-#define FDEBUG(arglist) { if (v->eflags&REG_FTRACE) printf arglist; }
-/* MDEBUG does higher-level tracing */
-#define MDEBUG(arglist) { if (v->eflags&REG_MTRACE) printf arglist; }
-#else
-#define FDEBUG(arglist) {}
-#define MDEBUG(arglist) {}
-#endif
-
-/*
- * bitmap manipulation
- */
-#define UBITS (CHAR_BIT * sizeof(unsigned))
-#define BSET(uv, sn) ((uv)[(sn)/UBITS] |= (unsigned)1 << ((sn)%UBITS))
-#define ISBSET(uv, sn) ((uv)[(sn)/UBITS] & ((unsigned)1 << ((sn)%UBITS)))
-
-/*
- * We dissect a chr into byts for colormap table indexing. Here we define a
- * byt, which will be the same as a byte on most machines... The exact size of
- * a byt is not critical, but about 8 bits is good, and extraction of 8-bit
- * chunks is sometimes especially fast.
- */
-
-#ifndef BYTBITS
-#define BYTBITS 8 /* bits in a byt */
-#endif
-#define BYTTAB (1<<BYTBITS) /* size of table with one entry per byt value */
-#define BYTMASK (BYTTAB-1) /* bit mask for byt */
-#define NBYTS ((CHRBITS+BYTBITS-1)/BYTBITS)
-/* the definition of GETCOLOR(), below, assumes NBYTS <= 4 */
-
-/*
- * As soon as possible, we map chrs into equivalence classes -- "colors" --
- * which are of much more manageable number.
- */
-
-typedef short color; /* colors of characters */
-typedef int pcolor; /* what color promotes to */
-#define MAX_COLOR SHRT_MAX /* max color value */
-#define COLORLESS (-1) /* impossible color */
-#define WHITE 0 /* default color, parent of all others */
-
-/*
- * A colormap is a tree -- more precisely, a DAG -- indexed at each level by a
- * byt of the chr, to map the chr to a color efficiently. Because lower
- * sections of the tree can be shared, it can exploit the usual sparseness of
- * such a mapping table. The tree is always NBYTS levels deep (in the past it
- * was shallower during construction but was "filled" to full depth at the end
- * of that); areas that are unaltered as yet point to "fill blocks" which are
- * entirely WHITE in color.
- */
-
-/* the tree itself */
-struct colors {
- color ccolor[BYTTAB];
-};
-struct ptrs {
- union tree *pptr[BYTTAB];
-};
-union tree {
- struct colors colors;
- struct ptrs ptrs;
-};
-#define tcolor colors.ccolor
-#define tptr ptrs.pptr
-
-/* Internal per-color descriptor structure for the color machinery */
-struct colordesc {
- uchr nchrs; /* number of chars of this color */
- color sub; /* open subcolor (if any); free chain ptr */
-#define NOSUB COLORLESS
- struct arc *arcs; /* color chain */
- int flags;
-#define FREECOL 01 /* currently free */
-#define PSEUDO 02 /* pseudocolor, no real chars */
-#define UNUSEDCOLOR(cd) ((cd)->flags&FREECOL)
- union tree *block; /* block of solid color, if any */
-};
-
-/*
- * The color map itself
- *
- * Much of the data in the colormap struct is only used at compile time.
- * However, the bulk of the space usage is in the "tree" structure, so it's
- * not clear that there's much point in converting the rest to a more compact
- * form when compilation is finished.
- */
-struct colormap {
- int magic;
-#define CMMAGIC 0x876
- struct vars *v; /* for compile error reporting */
- size_t ncds; /* number of colordescs */
- size_t max; /* highest in use */
- color free; /* beginning of free chain (if non-0) */
- struct colordesc *cd;
-#define CDEND(cm) (&(cm)->cd[(cm)->max + 1])
-#define NINLINECDS ((size_t)10)
- struct colordesc cdspace[NINLINECDS];
- union tree tree[NBYTS]; /* tree top, plus fill blocks */
-};
-
-/* optimization magic to do fast chr->color mapping */
-#define B0(c) ((c) & BYTMASK)
-#define B1(c) (((c)>>BYTBITS) & BYTMASK)
-#define B2(c) (((c)>>(2*BYTBITS)) & BYTMASK)
-#define B3(c) (((c)>>(3*BYTBITS)) & BYTMASK)
-#if NBYTS == 1
-#define GETCOLOR(cm, c) ((cm)->tree->tcolor[B0(c)])
-#endif
-/* beware, for NBYTS>1, GETCOLOR() is unsafe -- 2nd arg used repeatedly */
-#if NBYTS == 2
-#define GETCOLOR(cm, c) ((cm)->tree->tptr[B1(c)]->tcolor[B0(c)])
-#endif
-#if NBYTS == 4
-#define GETCOLOR(cm, c) ((cm)->tree->tptr[B3(c)]->tptr[B2(c)]->tptr[B1(c)]->tcolor[B0(c)])
-#endif
-
-/*
- * Interface definitions for locale-interface functions in locale.c.
- */
-
-/* Representation of a set of characters. */
-struct cvec {
- int nchrs; /* number of chrs */
- int chrspace; /* number of chrs possible */
- chr *chrs; /* pointer to vector of chrs */
- int nranges; /* number of ranges (chr pairs) */
- int rangespace; /* number of chrs possible */
- chr *ranges; /* pointer to vector of chr pairs */
-};
-
-/*
- * definitions for non-deterministic finite autmaton (NFA) internal
- * representation
- *
- * Having a "from" pointer within each arc may seem redundant, but it saves a
- * lot of hassle.
- */
-
-struct state;
-
-struct arc {
- int type; /* 0 if free, else an NFA arc type code */
- color co;
- struct state *from; /* where it's from (and contained within) */
- struct state *to; /* where it's to */
- struct arc *outchain; /* link in *from's outs chain or free chain */
- struct arc *outchainRev; /* back-link in *from's outs chain */
-#define freechain outchain /* we do not maintain "freechainRev" */
- struct arc *inchain; /* *to's ins chain */
- struct arc *inchainRev; /* back-link in *to's ins chain */
- struct arc *colorchain; /* color's arc chain */
- struct arc *colorchainRev; /* back-link in color's arc chain */
-};
-
-struct arcbatch { /* for bulk allocation of arcs */
- struct arcbatch *next;
-#define ABSIZE 10
- struct arc a[ABSIZE];
-};
-
-struct state {
- int no;
-#define FREESTATE (-1)
- char flag; /* marks special states */
- int nins; /* number of inarcs */
- struct arc *ins; /* chain of inarcs */
- int nouts; /* number of outarcs */
- struct arc *outs; /* chain of outarcs */
- struct arc *free; /* chain of free arcs */
- struct state *tmp; /* temporary for traversal algorithms */
- struct state *next; /* chain for traversing all */
- struct state *prev; /* back chain */
- struct arcbatch oas; /* first arcbatch, avoid malloc in easy case */
- int noas; /* number of arcs used in first arcbatch */
-};
-
-struct nfa {
- struct state *pre; /* pre-initial state */
- struct state *init; /* initial state */
- struct state *final; /* final state */
- struct state *post; /* post-final state */
- int nstates; /* for numbering states */
- struct state *states; /* state-chain header */
- struct state *slast; /* tail of the chain */
- struct state *free; /* free list */
- struct colormap *cm; /* the color map */
- color bos[2]; /* colors, if any, assigned to BOS and BOL */
- color eos[2]; /* colors, if any, assigned to EOS and EOL */
- struct vars *v; /* simplifies compile error reporting */
- struct nfa *parent; /* parent NFA, if any */
-};
-
-/*
- * definitions for compacted NFA
- *
- * The main space savings in a compacted NFA is from making the arcs as small
- * as possible. We store only the transition color and next-state number for
- * each arc. The list of out arcs for each state is an array beginning at
- * cnfa.states[statenumber], and terminated by a dummy carc struct with
- * co == COLORLESS.
- *
- * The non-dummy carc structs are of two types: plain arcs and LACON arcs.
- * Plain arcs just store the transition color number as "co". LACON arcs
- * store the lookahead constraint number plus cnfa.ncolors as "co". LACON
- * arcs can be distinguished from plain by testing for co >= cnfa.ncolors.
- */
-
-struct carc {
- color co; /* COLORLESS is list terminator */
- int to; /* next-state number */
-};
-
-struct cnfa {
- int nstates; /* number of states */
- int ncolors; /* number of colors */
- int flags;
-#define HASLACONS 01 /* uses lookahead constraints */
- int pre; /* setup state number */
- int post; /* teardown state number */
- color bos[2]; /* colors, if any, assigned to BOS and BOL */
- color eos[2]; /* colors, if any, assigned to EOS and EOL */
- char *stflags; /* vector of per-state flags bytes */
-#define CNFA_NOPROGRESS 01 /* flag bit for a no-progress state */
- struct carc **states; /* vector of pointers to outarc lists */
- /* states[n] are pointers into a single malloc'd array of arcs */
- struct carc *arcs; /* the area for the lists */
-};
-#define ZAPCNFA(cnfa) ((cnfa).nstates = 0)
-#define NULLCNFA(cnfa) ((cnfa).nstates == 0)
-
-/*
- * This symbol limits the transient heap space used by the regex compiler,
- * and thereby also the maximum complexity of NFAs that we'll deal with.
- * Currently we only count NFA states and arcs against this; the other
- * transient data is generally not large enough to notice compared to those.
- * Note that we do not charge anything for the final output data structures
- * (the compacted NFA and the colormap).
- */
-#ifndef REG_MAX_COMPILE_SPACE
-#define REG_MAX_COMPILE_SPACE \
- (100000 * sizeof(struct state) + 100000 * sizeof(struct arcbatch))
-#endif
-
-/*
- * subexpression tree
- *
- * "op" is one of:
- * '=' plain regex without interesting substructure (implemented as DFA)
- * 'b' back-reference (has no substructure either)
- * '(' capture node: captures the match of its single child
- * '.' concatenation: matches a match for left, then a match for right
- * '|' alternation: matches a match for left or a match for right
- * '*' iteration: matches some number of matches of its single child
- *
- * Note: the right child of an alternation must be another alternation or
- * NULL; hence, an N-way branch requires N alternation nodes, not N-1 as you
- * might expect. This could stand to be changed. Actually I'd rather see
- * a single alternation node with N children, but that will take revising
- * the representation of struct subre.
- *
- * Note: when a backref is directly quantified, we stick the min/max counts
- * into the backref rather than plastering an iteration node on top. This is
- * for efficiency: there is no need to search for possible division points.
- */
-
-struct subre {
- char op; /* see type codes above */
- char flags;
-#define LONGER 01 /* prefers longer match */
-#define SHORTER 02 /* prefers shorter match */
-#define MIXED 04 /* mixed preference below */
-#define CAP 010 /* capturing parens below */
-#define BACKR 020 /* back reference below */
-#define INUSE 0100 /* in use in final tree */
-#define NOPROP 03 /* bits which may not propagate up */
-#define LMIX(f) ((f)<<2) /* LONGER -> MIXED */
-#define SMIX(f) ((f)<<1) /* SHORTER -> MIXED */
-#define UP(f) (((f)&~NOPROP) | (LMIX(f) & SMIX(f) & MIXED))
-#define MESSY(f) ((f)&(MIXED|CAP|BACKR))
-#define PREF(f) ((f)&NOPROP)
-#define PREF2(f1, f2) ((PREF(f1) != 0) ? PREF(f1) : PREF(f2))
-#define COMBINE(f1, f2) (UP((f1)|(f2)) | PREF2(f1, f2))
- short id; /* ID of subre (1..ntree-1) */
- int subno; /* subexpression number (for 'b' and '(') */
- short min; /* min repetitions for iteration or backref */
- short max; /* max repetitions for iteration or backref */
- struct subre *left; /* left child, if any (also freelist chain) */
- struct subre *right; /* right child, if any */
- struct state *begin; /* outarcs from here... */
- struct state *end; /* ...ending in inarcs here */
- struct cnfa cnfa; /* compacted NFA, if any */
- struct subre *chain; /* for bookkeeping and error cleanup */
-};
-
-/*
- * table of function pointers for generic manipulation functions. A regex_t's
- * re_fns points to one of these.
- */
-
-struct fns {
- void FUNCPTR(free, (regex_t *));
-};
-
-/*
- * the insides of a regex_t, hidden behind a void *
- */
-
-struct guts {
- int magic;
-#define GUTSMAGIC 0xfed9
- int cflags; /* copy of compile flags */
- long info; /* copy of re_info */
- size_t nsub; /* copy of re_nsub */
- struct subre *tree;
- struct cnfa search; /* for fast preliminary search */
- int ntree; /* number of subre's, plus one */
- struct colormap cmap;
- int FUNCPTR(compare, (const chr *, const chr *, size_t));
- struct subre *lacons; /* lookahead-constraint vector */
- int nlacons; /* size of lacons */
-};
-
-/*
- * Magic for allocating a variable workspace. This default version is
- * stack-hungry.
- */
-
-#ifndef AllocVars
-#define AllocVars(vPtr) \
- struct vars var; \
- register struct vars *vPtr = &var
-#endif
-#ifndef FreeVars
-#define FreeVars(vPtr) ((void) 0)
-#endif
-
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */