-/* $Header: regcomp.h,v 4.0 91/03/20 01:39:09 lwall Locked $
- *
- * $Log: regcomp.h,v $
- * Revision 4.0 91/03/20 01:39:09 lwall
- * 4.0 baseline.
- *
+/* regcomp.h
*/
+typedef OP OP_4tree; /* Will be redefined later. */
+
/*
* The "internal use only" fields in regexp.h are present to pass info from
* compile to execute that permits the execute phase to run lots faster on
* simple cases. They are:
*
- * regstart str that must begin a match; Nullch if none obvious
+ * regstart sv that must begin a match; Nullch if none obvious
* reganch is the match anchored (at beginning-of-line only)?
* regmust string (pointer into program) that match must include, or NULL
- * [regmust changed to STR* for bminstr()--law]
+ * [regmust changed to SV* for bminstr()--law]
* regmlen length of regmust string
* [regmlen not used currently]
*
* Regstart and reganch permit very fast decisions on suitable starting points
* for a match, cutting down the work a lot. Regmust permits fast rejection
* of lines that cannot possibly match. The regmust tests are costly enough
- * that regcomp() supplies a regmust only if the r.e. contains something
+ * that pregcomp() supplies a regmust only if the r.e. contains something
* potentially expensive (at present, the only such thing detected is * or +
* at the start of the r.e., which can involve a lot of backup). Regmlen is
- * supplied because the test in regexec() needs it and regcomp() is computing
+ * supplied because the test in pregexec() needs it and pregcomp() is computing
* it anyway.
* [regmust is now supplied always. The tests that use regmust have a
* heuristic that disables the test if it usually matches.]
* to the thing following the set of BRANCHes.) The opcodes are:
*/
-/* definition number opnd? meaning */
-#define END 0 /* no End of program. */
-#define BOL 1 /* no Match "" at beginning of line. */
-#define EOL 2 /* no Match "" at end of line. */
-#define ANY 3 /* no Match any one character. */
-#define ANYOF 4 /* str Match character in (or not in) this class. */
-#define CURLY 5 /* str Match this simple thing {n,m} times. */
-#define BRANCH 6 /* node Match this alternative, or the next... */
-#define BACK 7 /* no Match "", "next" ptr points backward. */
-#define EXACTLY 8 /* str Match this string (preceded by length). */
-#define NOTHING 9 /* no Match empty string. */
-#define STAR 10 /* node Match this (simple) thing 0 or more times. */
-#define PLUS 11 /* node Match this (simple) thing 1 or more times. */
-#define ALNUM 12 /* no Match any alphanumeric character */
-#define NALNUM 13 /* no Match any non-alphanumeric character */
-#define BOUND 14 /* no Match "" at any word boundary */
-#define NBOUND 15 /* no Match "" at any word non-boundary */
-#define SPACE 16 /* no Match any whitespace character */
-#define NSPACE 17 /* no Match any non-whitespace character */
-#define DIGIT 18 /* no Match any numeric character */
-#define NDIGIT 19 /* no Match any non-numeric character */
-#define REF 20 /* num Match some already matched string */
-#define OPEN 21 /* num Mark this point in input as start of #n. */
-#define CLOSE 22 /* num Analogous to OPEN. */
-
-/*
- * Opcode notes:
- *
- * BRANCH The set of branches constituting a single choice are hooked
- * together with their "next" pointers, since precedence prevents
- * anything being concatenated to any individual branch. The
- * "next" pointer of the last BRANCH in a choice points to the
- * thing following the whole choice. This is also where the
- * final "next" pointer of each individual branch points; each
- * branch starts with the operand node of a BRANCH node.
- *
- * BACK Normal "next" pointers all implicitly point forward; BACK
- * exists to make loop structures possible.
- *
- * STAR,PLUS '?', and complex '*' and '+', are implemented as circular
- * BRANCH structures using BACK. Simple cases (one character
- * per match) are implemented with STAR and PLUS for speed
- * and to minimize recursive plunges.
- *
- * OPEN,CLOSE ...are numbered at compile time.
- */
-
-#ifndef DOINIT
-extern char regarglen[];
-#else
-char regarglen[] = {0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2};
-#endif
-
-/* The following have no fixed length. */
-#ifndef DOINIT
-extern char varies[];
-#else
-char varies[] = {BRANCH,BACK,STAR,PLUS,CURLY,REF,0};
-#endif
-
-/* The following always have a length of 1. */
-#ifndef DOINIT
-extern char simple[];
-#else
-char simple[] = {ANY,ANYOF,ALNUM,NALNUM,SPACE,NSPACE,DIGIT,NDIGIT,0};
-#endif
-
-EXT char regdummy;
-
/*
* A node is one char of opcode followed by two chars of "next" pointer.
* "Next" pointers are stored as two 8-bit pieces, high order first. The
* Using two bytes for the "next" pointer is vast overkill for most things,
* but allows patterns to get big without disasters.
*
- * [If REGALIGN is defined, the "next" pointer is always aligned on an even
+ * [The "next" pointer is always aligned on an even
* boundary, and reads the offset directly as a short. Also, there is no
* special test to reverse the sign of BACK pointers since the offset is
* stored negative.]
*/
-#ifndef gould
-#ifndef cray
-#ifndef eta10
-#define REGALIGN
-#endif
+struct regnode_string {
+ U8 str_len;
+ U8 type;
+ U16 next_off;
+ char string[1];
+};
+
+struct regnode_1 {
+ U8 flags;
+ U8 type;
+ U16 next_off;
+ U32 arg1;
+};
+
+struct regnode_2 {
+ U8 flags;
+ U8 type;
+ U16 next_off;
+ U16 arg1;
+ U16 arg2;
+};
+
+#define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
+#define ANYOF_CLASSBITMAP_SIZE 4
+
+struct regnode_charclass {
+ U8 flags;
+ U8 type;
+ U16 next_off;
+ char bitmap[ANYOF_BITMAP_SIZE];
+};
+
+struct regnode_charclass_class {
+ U8 flags;
+ U8 type;
+ U16 next_off;
+ char bitmap[ANYOF_BITMAP_SIZE];
+ char classflags[ANYOF_CLASSBITMAP_SIZE];
+};
+
+/* XXX fix this description.
+ Impose a limit of REG_INFTY on various pattern matching operations
+ to limit stack growth and to avoid "infinite" recursions.
+*/
+/* The default size for REG_INFTY is I16_MAX, which is the same as
+ SHORT_MAX (see perl.h). Unfortunately I16 isn't necessarily 16 bits
+ (see handy.h). On the Cray C90, sizeof(short)==4 and hence I16_MAX is
+ ((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
+ ((1<<63)-1). To limit stack growth to reasonable sizes, supply a
+ smaller default.
+ --Andy Dougherty 11 June 1998
+*/
+#if SHORTSIZE > 2
+# ifndef REG_INFTY
+# define REG_INFTY ((1<<15)-1)
+# endif
#endif
+
+#ifndef REG_INFTY
+# define REG_INFTY I16_MAX
#endif
-#define OP(p) (*(p))
+#define ARG_VALUE(arg) (arg)
+#define ARG__SET(arg,val) ((arg) = (val))
+
+#define ARG(p) ARG_VALUE(ARG_LOC(p))
+#define ARG1(p) ARG_VALUE(ARG1_LOC(p))
+#define ARG2(p) ARG_VALUE(ARG2_LOC(p))
+#define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
+#define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
+#define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
#ifndef lint
-#ifdef REGALIGN
-#define NEXT(p) (*(short*)(p+1))
-#define ARG1(p) (*(unsigned short*)(p+3))
-#define ARG2(p) (*(unsigned short*)(p+5))
-#else
-#define NEXT(p) (((*((p)+1)&0377)<<8) + (*((p)+2)&0377))
-#define ARG1(p) (((*((p)+3)&0377)<<8) + (*((p)+4)&0377))
-#define ARG2(p) (((*((p)+5)&0377)<<8) + (*((p)+6)&0377))
-#endif
+# define NEXT_OFF(p) ((p)->next_off)
+# define NODE_ALIGN(node)
+# define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
#else /* lint */
-#define NEXT(p) 0
+# define NEXT_OFF(p) 0
+# define NODE_ALIGN(node)
+# define NODE_ALIGN_FILL(node)
#endif /* lint */
-#define OPERAND(p) ((p) + 3)
+#define SIZE_ALIGN NODE_ALIGN
-#ifdef REGALIGN
-#define NEXTOPER(p) ((p) + 4)
-#else
-#define NEXTOPER(p) ((p) + 3)
-#endif
+#define OP(p) ((p)->type)
+#define OPERAND(p) (((struct regnode_string *)p)->string)
+#define MASK(p) ((char*)OPERAND(p))
+#define STR_LEN(p) (((struct regnode_string *)p)->str_len)
+#define STRING(p) (((struct regnode_string *)p)->string)
+#define STR_SZ(l) ((l + sizeof(regnode) - 1) / sizeof(regnode))
+#define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p))+1)
+
+#define NODE_ALIGN(node)
+#define ARG_LOC(p) (((struct regnode_1 *)p)->arg1)
+#define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1)
+#define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2)
+#define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */
+#define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2)
-#define MAGIC 0234
+#define NODE_STEP_B 4
+
+#define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
+#define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
+
+#define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
+ (ptr)->type = op; (ptr)->next_off = 0; (ptr)++; } STMT_END
+#define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
+ ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
+
+#define REG_MAGIC 0234
+
+#define SIZE_ONLY (PL_regcode == &PL_regdummy)
+
+/* Flags for node->flags of ANYOF */
+
+#define ANYOF_CLASS 0x08
+#define ANYOF_INVERT 0x04
+#define ANYOF_FOLD 0x02
+#define ANYOF_LOCALE 0x01
+
+/* Used for regstclass only */
+#define ANYOF_EOS 0x10 /* Can match an empty string too */
+
+/* Character classes for node->classflags of ANYOF */
+/* Should be synchronized with a table in regprop() */
+/* 2n should pair with 2n+1 */
+
+#define ANYOF_ALNUM 0 /* \w, utf8::IsWord, isALNUM() */
+#define ANYOF_NALNUM 1
+#define ANYOF_SPACE 2
+#define ANYOF_NSPACE 3
+#define ANYOF_DIGIT 4
+#define ANYOF_NDIGIT 5
+#define ANYOF_ALNUMC 6 /* isalnum(3), utf8::IsAlnum, isALNUMC() */
+#define ANYOF_NALNUMC 7
+#define ANYOF_ALPHA 8
+#define ANYOF_NALPHA 9
+#define ANYOF_ASCII 10
+#define ANYOF_NASCII 11
+#define ANYOF_CNTRL 12
+#define ANYOF_NCNTRL 13
+#define ANYOF_GRAPH 14
+#define ANYOF_NGRAPH 15
+#define ANYOF_LOWER 16
+#define ANYOF_NLOWER 17
+#define ANYOF_PRINT 18
+#define ANYOF_NPRINT 19
+#define ANYOF_PUNCT 20
+#define ANYOF_NPUNCT 21
+#define ANYOF_UPPER 22
+#define ANYOF_NUPPER 23
+#define ANYOF_XDIGIT 24
+#define ANYOF_NXDIGIT 25
+
+#define ANYOF_MAX 31
+
+/* Backward source code compatibility. */
+
+#define ANYOF_ALNUML ANYOF_ALNUM
+#define ANYOF_NALNUML ANYOF_NALNUM
+#define ANYOF_SPACEL ANYOF_SPACE
+#define ANYOF_NSPACEL ANYOF_NSPACE
+
+/* Utility macros for the bitmap and classes of ANYOF */
+
+#define ANYOF_SIZE (sizeof(struct regnode_charclass))
+#define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
+
+#define ANYOF_FLAGS(p) ((p)->flags)
+#define ANYOF_FLAGS_ALL 0xff
+
+#define ANYOF_BIT(c) (1 << ((c) & 7))
+
+#define ANYOF_CLASS_BYTE(p, c) (((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
+#define ANYOF_CLASS_SET(p, c) (ANYOF_CLASS_BYTE(p, c) |= ANYOF_BIT(c))
+#define ANYOF_CLASS_CLEAR(p, c) (ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
+#define ANYOF_CLASS_TEST(p, c) (ANYOF_CLASS_BYTE(p, c) & ANYOF_BIT(c))
+
+#define ANYOF_CLASS_ZERO(ret) Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
+#define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
+
+#define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
+#define ANYOF_BITMAP_BYTE(p, c) (ANYOF_BITMAP(p)[((c) >> 3) & 31])
+#define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) |= ANYOF_BIT(c))
+#define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
+#define ANYOF_BITMAP_TEST(p, c) (ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c))
+
+#define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
+#define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
+#define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
/*
* Utility definitions.
*/
#ifndef lint
-#ifndef CHARBITS
-#define UCHARAT(p) ((int)*(unsigned char *)(p))
+#ifndef CHARMASK
+#define UCHARAT(p) ((int)*(U8*)(p))
#else
-#define UCHARAT(p) ((int)*(p)&CHARBITS)
+#define UCHARAT(p) ((int)*(p)&CHARMASK)
#endif
#else /* lint */
-#define UCHARAT(p) regdummy
+#define UCHARAT(p) PL_regdummy
#endif /* lint */
-#define FAIL(m) fatal("/%s/: %s",regprecomp,m)
+#define FAIL(m) \
+ STMT_START { \
+ if (!SIZE_ONLY) \
+ SAVEDESTRUCTOR_X(clear_re,(void*)PL_regcomp_rx); \
+ Perl_croak(aTHX_ "/%.127s/: %s", PL_regprecomp,m); \
+ } STMT_END
+
+#define FAIL2(pat,m) \
+ STMT_START { \
+ if (!SIZE_ONLY) \
+ SAVEDESTRUCTOR_X(clear_re,(void*)PL_regcomp_rx); \
+ S_re_croak2(aTHX_ "/%.127s/: ",pat,PL_regprecomp,m); \
+ } STMT_END
+
+#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
+
+#define REG_SEEN_ZERO_LEN 1
+#define REG_SEEN_LOOKBEHIND 2
+#define REG_SEEN_GPOS 4
+#define REG_SEEN_EVAL 8
+
+START_EXTERN_C
+
+#include "regnodes.h"
+
+/* The following have no fixed length. U8 so we can do strchr() on it. */
+#ifndef DOINIT
+EXTCONST U8 PL_varies[];
+#else
+EXTCONST U8 PL_varies[] = {
+ BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
+ WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP, 0
+};
+#endif
-char *regnext();
-#ifdef DEBUGGING
-void regdump();
-char *regprop();
+/* The following always have a length of 1. U8 we can do strchr() on it. */
+/* (Note that length 1 means "one character" under UTF8, not "one octet".) */
+#ifndef DOINIT
+EXTCONST U8 PL_simple[];
+#else
+EXTCONST U8 PL_simple[] = {
+ REG_ANY, ANYUTF8, SANY, SANYUTF8, ANYOF, ANYOFUTF8,
+ ALNUM, ALNUMUTF8, ALNUML, ALNUMLUTF8,
+ NALNUM, NALNUMUTF8, NALNUML, NALNUMLUTF8,
+ SPACE, SPACEUTF8, SPACEL, SPACELUTF8,
+ NSPACE, NSPACEUTF8, NSPACEL, NSPACELUTF8,
+ DIGIT, DIGITUTF8, NDIGIT, NDIGITUTF8, 0
+};
#endif
+END_EXTERN_C
+
+typedef struct re_scream_pos_data_s
+{
+ char **scream_olds; /* match pos */
+ I32 *scream_pos; /* Internal iterator of scream. */
+} re_scream_pos_data;
+
+struct reg_data {
+ U32 count;
+ U8 *what;
+ void* data[1];
+};
+
+struct reg_substr_datum {
+ I32 min_offset;
+ I32 max_offset;
+ SV *substr;
+};
+
+struct reg_substr_data {
+ struct reg_substr_datum data[3]; /* Actual array */
+};
+
+#define anchored_substr substrs->data[0].substr
+#define anchored_offset substrs->data[0].min_offset
+#define float_substr substrs->data[1].substr
+#define float_min_offset substrs->data[1].min_offset
+#define float_max_offset substrs->data[1].max_offset
+#define check_substr substrs->data[2].substr
+#define check_offset_min substrs->data[2].min_offset
+#define check_offset_max substrs->data[2].max_offset