* For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
*/
-/* #ifndef gould */
-/* #ifndef cray */
-/* #ifndef eta10 */
-#define REGALIGN
-/* #endif */
-/* #endif */
-/* #endif */
-
-#ifdef REGALIGN
-# define REGALIGN_STRUCT
-#endif
-
/*
* Structure for regexp "program". This is essentially a linear encoding
* of a nondeterministic finite-state machine (aka syntax charts or
* 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 MBOL 2 /* no Same, assuming multiline. */
-#define SBOL 3 /* no Same, assuming singleline. */
-#define EOL 4 /* no Match "" at end of line. */
-#define MEOL 5 /* no Same, assuming multiline. */
-#define SEOL 6 /* no Same, assuming singleline. */
-#define ANY 7 /* no Match any one character (except newline). */
-#define SANY 8 /* no Match any one character. */
-#define ANYOF 9 /* sv Match character in (or not in) this class. */
-#define CURLY 10 /* sv Match this simple thing {n,m} times. */
-#define CURLYX 11 /* sv Match this complex thing {n,m} times. */
-#define BRANCH 12 /* node Match this alternative, or the next... */
-#define BACK 13 /* no Match "", "next" ptr points backward. */
-#define EXACT 14 /* sv Match this string (preceded by length). */
-#define EXACTF 15 /* sv Match this string, folded (prec. by length). */
-#define EXACTFL 16 /* sv Match this string, folded in locale (w/len). */
-#define NOTHING 17 /* no Match empty string. */
-#define STAR 18 /* node Match this (simple) thing 0 or more times. */
-#define PLUS 19 /* node Match this (simple) thing 1 or more times. */
-#define BOUND 20 /* no Match "" at any word boundary */
-#define BOUNDL 21 /* no Match "" at any word boundary */
-#define NBOUND 22 /* no Match "" at any word non-boundary */
-#define NBOUNDL 23 /* no Match "" at any word non-boundary */
-#define REF 24 /* num Match some already matched string */
-#define OPEN 25 /* num Mark this point in input as start of #n. */
-#define CLOSE 26 /* num Analogous to OPEN. */
-#define MINMOD 27 /* no Next operator is not greedy. */
-#define GPOS 28 /* no Matches where last m//g left off. */
-#define IFMATCH 29 /* off Succeeds if the following matches. */
-#define UNLESSM 30 /* off Fails if the following matches. */
-#define SUCCEED 31 /* no Return from a subroutine, basically. */
-#define WHILEM 32 /* no Do curly processing and see if rest matches. */
-#define ALNUM 33 /* no Match any alphanumeric character */
-#define ALNUML 34 /* no Match any alphanumeric char in locale */
-#define NALNUM 35 /* no Match any non-alphanumeric character */
-#define NALNUML 36 /* no Match any non-alphanumeric char in locale */
-#define SPACE 37 /* no Match any whitespace character */
-#define SPACEL 38 /* no Match any whitespace char in locale */
-#define NSPACE 39 /* no Match any non-whitespace character */
-#define NSPACEL 40 /* no Match any non-whitespace char in locale */
-#define DIGIT 41 /* no Match any numeric character */
-#define NDIGIT 42 /* no Match any non-numeric character */
-#define CURLYM 43 /* no Match this medium-complex thing {n,m} times. */
-#define CURLYN 44 /* no Match next-after-this simple thing
- {n,m} times, set parenths. */
-#define TAIL 45 /* no Match empty string. Can jump here from outside. */
-#define REFF 46 /* num Match already matched string, folded */
-#define REFFL 47 /* num Match already matched string, folded in loc. */
-#define EVAL 48 /* evl Execute some Perl code. */
-#define LONGJMP 49 /* off Jump far away, requires REGALIGN_STRUCT. */
-#define BRANCHJ 50 /* off BRANCH with long offset, requires REGALIGN_STRUCT. */
-#define IFTHEN 51 /* off Switch, should be preceeded by switcher . */
-#define GROUPP 52 /* num Whether the group matched. */
-#define LOGICAL 53 /* no Next opcode should set the flag only. */
-#define SUSPEND 54 /* off "Independent" sub-RE. */
-#define RENUM 55 /* off Group with independently numbered parens. */
-#define OPTIMIZED 56 /* off Placeholder for dump. */
-
-/*
- * 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,GROUPP ...are numbered at compile time.
- */
-
-#ifndef DOINIT
-EXTCONST U8 regkind[];
-#else
-EXTCONST U8 regkind[] = {
- END,
- BOL,
- BOL,
- BOL,
- EOL,
- EOL,
- EOL,
- ANY,
- ANY,
- ANYOF,
- CURLY,
- CURLY,
- BRANCH,
- BACK,
- EXACT,
- EXACT,
- EXACT,
- NOTHING,
- STAR,
- PLUS,
- BOUND,
- BOUND,
- NBOUND,
- NBOUND,
- REF,
- OPEN,
- CLOSE,
- MINMOD,
- GPOS,
- BRANCHJ,
- BRANCHJ,
- END,
- WHILEM,
- ALNUM,
- ALNUM,
- NALNUM,
- NALNUM,
- SPACE,
- SPACE,
- NSPACE,
- NSPACE,
- DIGIT,
- NDIGIT,
- CURLY,
- CURLY,
- NOTHING,
- REF,
- REF,
- EVAL,
- LONGJMP,
- BRANCHJ,
- BRANCHJ,
- GROUPP,
- LOGICAL,
- BRANCHJ,
- BRANCHJ,
- NOTHING,
-};
-#endif
-
-/* The following have no fixed length. char* since we do strchr on it. */
-#ifndef DOINIT
-EXT const char varies[];
-#else
-EXT const char varies[] = {
- BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
- WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, 0
-};
-#endif
-
-/* The following always have a length of 1. char* since we do strchr on it. */
-#ifndef DOINIT
-EXT const char simple[];
-#else
-EXT const char simple[] = {
- ANY, SANY, ANYOF,
- ALNUM, ALNUML, NALNUM, NALNUML,
- SPACE, SPACEL, NSPACE, NSPACEL,
- DIGIT, NDIGIT, 0
-};
-#endif
-
/*
* 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.]
*/
-#ifdef REGALIGN_STRUCT
-
struct regnode_string {
U8 flags;
U8 type;
U16 arg2;
};
-#endif
-
-#define REG_INFTY I16_MAX
+/* 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
-#ifdef REGALIGN
-# define ARG_VALUE(arg) (arg)
-# define ARG__SET(arg,val) ((arg) = (val))
-#else
-# define ARG_VALUE(arg) (((*((char*)&arg)&0377)<<8) + (*(((char*)&arg)+1)&0377))
-# define ARG__SET(arg,val) (((char*)&arg)[0] = (val) >> 8; ((char*)&arg)[1] = (val) & 0377;)
+#ifndef REG_INFTY
+# define REG_INFTY I16_MAX
#endif
+#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 ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
#ifndef lint
-# ifdef REGALIGN
-# ifdef REGALIGN_STRUCT
-# define NEXT_OFF(p) ((p)->next_off)
-# define NODE_ALIGN(node)
-# define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
-# else
-# define NEXT_OFF(p) (*(short*)(p+1))
-# define NODE_ALIGN(node) ((!((long)node & 1)) ? node++ : 0)
-# define NODE_ALIGN_FILL(node) ((!((long)node & 1)) ? *node++ = 127 : 0)
-# endif
-# else
-# define NEXT_OFF(p) (((*((p)+1)&0377)<<8) + (*((p)+2)&0377))
-# define NODE_ALIGN(node)
-# define NODE_ALIGN_FILL(node)
-# 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_OFF(p) 0
-# define NODE_ALIGN(node)
-# define NODE_ALIGN_FILL(node)
+# define NODE_ALIGN(node)
+# define NODE_ALIGN_FILL(node)
#endif /* lint */
#define SIZE_ALIGN NODE_ALIGN
-#ifdef REGALIGN_STRUCT
-# define OP(p) ((p)->type)
-# define OPERAND(p) (((struct regnode_string *)p)->string)
-# 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)
-#else
-# define OP(p) (*(p))
-# define OPERAND(p) ((p) + 3)
-# define ARG_LOC(p) (*(unsigned short*)(p+3))
-# define ARG1_LOC(p) (*(unsigned short*)(p+3))
-# define ARG2_LOC(p) (*(unsigned short*)(p+5))
-typedef char* regnode;
-# define NODE_STEP_REGNODE NODE_STEP_B
-# define EXTRA_STEP_2ARGS 4
-#endif
-
-#ifdef REGALIGN
-# define NODE_STEP_B 4
-#else
-# define NODE_STEP_B 3
-#endif
+#define OP(p) ((p)->type)
+#define OPERAND(p) (((struct regnode_string *)p)->string)
+#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 NODE_STEP_B 4
#define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
#define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
-#ifdef REGALIGN_STRUCT
-# define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
+#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 { \
+#define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
-#else
-# define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
- *(ptr)++ = op; *(ptr)++ = '\0'; *(ptr)++ = '\0'; } STMT_END
-# define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
- ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 2; } STMT_END
-#endif
-#define MAGIC 0234
+#define REG_MAGIC 0234
-#define SIZE_ONLY (regcode == ®dummy)
+#define SIZE_ONLY (PL_regcode == &PL_regdummy)
/* Flags for first parameter byte of ANYOF */
#define ANYOF_INVERT 0x40
#define ANYOF_SPACEL 0x02
#define ANYOF_NSPACEL 0x01
-#ifdef REGALIGN_STRUCT
+/* Utility macros for bitmap of ANYOF */
+#define ANYOF_BYTE(p,c) (p)[1 + (((c) >> 3) & 31)]
+#define ANYOF_BIT(c) (1 << ((c) & 7))
+#define ANYOF_SET(p,c) (ANYOF_BYTE(p,c) |= ANYOF_BIT(c))
+#define ANYOF_CLEAR(p,c) (ANYOF_BYTE(p,c) &= ~ANYOF_BIT(c))
+#define ANYOF_TEST(p,c) (ANYOF_BYTE(p,c) & ANYOF_BIT(c))
+
#define ANY_SKIP ((33 - 1)/sizeof(regnode) + 1)
-#else
-#define ANY_SKIP 32 /* overwrite the first byte of
- * the next guy. */
-#endif
/*
* Utility definitions.
#define UCHARAT(p) ((int)*(p)&CHARMASK)
#endif
#else /* lint */
-#define UCHARAT(p) regdummy
+#define UCHARAT(p) PL_regdummy
#endif /* lint */
-#define FAIL(m) croak ("/%.127s/: %s", regprecomp,m)
-#define FAIL2(pat,m) re_croak2("/%.127s/: ",pat,regprecomp,m)
-
-#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
+#define FAIL(m) \
+ STMT_START { \
+ if (!SIZE_ONLY) \
+ SAVEDESTRUCTOR(S_clear_re,(void*)PL_regcomp_rx); \
+ Perl_croak(aTHX_ "/%.127s/: %s", PL_regprecomp,m); \
+ } STMT_END
-#ifdef REG_COMP_C
-const static U8 regarglen[] = {
-# ifdef REGALIGN_STRUCT
- 0,0,0,0,0,0,0,0,0,0,
- /*CURLY*/ EXTRA_SIZE(struct regnode_2),
- /*CURLYX*/ EXTRA_SIZE(struct regnode_2),
- 0,0,0,0,0,0,0,0,0,0,0,0,
- /*REF*/ EXTRA_SIZE(struct regnode_1),
- /*OPEN*/ EXTRA_SIZE(struct regnode_1),
- /*CLOSE*/ EXTRA_SIZE(struct regnode_1),
- 0,0,
- /*IFMATCH*/ EXTRA_SIZE(struct regnode_1),
- /*UNLESSM*/ EXTRA_SIZE(struct regnode_1),
- 0,0,0,0,0,0,0,0,0,0,0,0,
- /*CURLYM*/ EXTRA_SIZE(struct regnode_2),
- /*CURLYN*/ EXTRA_SIZE(struct regnode_2),
- 0,
- /*REFF*/ EXTRA_SIZE(struct regnode_1),
- /*REFFL*/ EXTRA_SIZE(struct regnode_1),
- /*EVAL*/ EXTRA_SIZE(struct regnode_1),
- /*LONGJMP*/ EXTRA_SIZE(struct regnode_1),
- /*BRANCHJ*/ EXTRA_SIZE(struct regnode_1),
- /*IFTHEN*/ EXTRA_SIZE(struct regnode_1),
- /*GROUPP*/ EXTRA_SIZE(struct regnode_1),
- /*LOGICAL*/ 0,
- /*SUSPEND*/ EXTRA_SIZE(struct regnode_1),
- /*RENUM*/ EXTRA_SIZE(struct regnode_1), 0,
-# else
- 0,0,0,0,0,0,0,0,0,0,
- /*CURLY*/ 4, /*CURLYX*/ 4,
- 0,0,0,0,0,0,0,0,0,0,0,0,
- /*REF*/ 2, /*OPEN*/ 2, /*CLOSE*/ 2,
- 0,0, /*IFMATCH*/ 2, /*UNLESSM*/ 2,
- 0,0,0,0,0,0,0,0,0,0,0,0,/*CURLYM*/ 4,/*CURLYN*/ 4,
- 0, /*REFF*/ 2, /*REFFL*/ 2, /*EVAL*/ 2, /*LONGJMP*/ 2, /*BRANCHJ*/ 2,
- /*IFTHEN*/ 2, /*GROUPP*/ 2, /*LOGICAL*/ 0, /*RENUM*/ 2, /*RENUM*/ 2, 0,
-# endif
-};
+#define FAIL2(pat,m) \
+ STMT_START { \
+ if (!SIZE_ONLY) \
+ SAVEDESTRUCTOR(S_clear_re,(void*)PL_regcomp_rx); \
+ S_re_croak2(aTHX_ "/%.127s/: ",pat,PL_regprecomp,m); \
+ } STMT_END
-const static char reg_off_by_arg[] = {
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0 .. 15 */
- 0,0,0,0,0,0,0,0,0,0,0,0,0, /*IFMATCH*/ 2, /*UNLESSM*/ 2, 0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 32 .. 47 */
- 0, /*LONGJMP*/ 1, /*BRANCHJ*/ 1, /*IFTHEN*/ 1, 0, 0,
- /*RENUM*/ 1, /*RENUM*/ 1,0,
-};
-#endif
+#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
-#ifdef DEBUGGING
-extern char *colors[4];
-#endif
+#include "regnodes.h"
+
+/* The following have no fixed length. char* since we do strchr on it. */
+#ifndef DOINIT
+EXTCONST char PL_varies[];
+#else
+EXTCONST char PL_varies[] = {
+ BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
+ WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP, 0
+};
+#endif
+
+/* The following always have a length of 1. char* since we do strchr on it. */
+/* (Note that lenght 1 means "one character" under UTF8, not "one octet".) */
+#ifndef DOINIT
+EXTCONST char PL_simple[];
+#else
+EXTCONST char 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
-void re_croak2 _((const char* pat1,const char* pat2,...)) __attribute__((noreturn));
+END_EXTERN_C
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