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-rw-r--r--posix/regex.c204
1 files changed, 162 insertions, 42 deletions
diff --git a/posix/regex.c b/posix/regex.c
index 370a612603..202ee19c86 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -35,8 +35,12 @@
#include <config.h>
#endif
+#if defined(STDC_HEADERS) && !defined(emacs)
+#include <stddef.h>
+#else
/* We need this for `regex.h', and perhaps for the Emacs include files. */
#include <sys/types.h>
+#endif
/* This is for other GNU distributions with internationalized messages. */
#if HAVE_LIBINTL_H || defined (_LIBC)
@@ -500,6 +504,7 @@ typedef enum
} while (0)
#ifdef DEBUG
+static void extract_number _RE_ARGS ((int *dest, unsigned char *source));
static void
extract_number (dest, source)
int *dest;
@@ -527,6 +532,8 @@ extract_number (dest, source)
} while (0)
#ifdef DEBUG
+static void extract_number_and_incr _RE_ARGS ((int *destination,
+ unsigned char **source));
static void
extract_number_and_incr (destination, source)
int *destination;
@@ -890,6 +897,13 @@ print_double_string (where, string1, size1, string2, size2)
}
}
+void
+printchar (c)
+ int c;
+{
+ putc (c, stderr);
+}
+
#else /* not DEBUG */
#undef assert
@@ -1007,9 +1021,35 @@ static const char *re_error_msgid[] =
#endif
/* Roughly the maximum number of failure points on the stack. Would be
- exactly that if always used MAX_FAILURE_ITEMS items each time we failed.
+ exactly that if always used MAX_FAILURE_SPACE each time we failed.
This is a variable only so users of regex can assign to it; we never
change it ourselves. */
+
+#ifdef INT_IS_16BIT
+
+#if defined (MATCH_MAY_ALLOCATE)
+long re_max_failures = 4000;
+#else
+long re_max_failures = 2000;
+#endif
+
+union fail_stack_elt
+{
+ unsigned char *pointer;
+ long integer;
+};
+
+typedef union fail_stack_elt fail_stack_elt_t;
+
+typedef struct
+{
+ fail_stack_elt_t *stack;
+ unsigned long size;
+ unsigned long avail; /* Offset of next open position. */
+} fail_stack_type;
+
+#else /* not INT_IS_16BIT */
+
#if defined (MATCH_MAY_ALLOCATE)
/* 4400 was enough to cause a crash on Alpha OSF/1,
whose default stack limit is 2mb. */
@@ -1033,6 +1073,8 @@ typedef struct
unsigned avail; /* Offset of next open position. */
} fail_stack_type;
+#endif /* INT_IS_16BIT */
+
#define FAIL_STACK_EMPTY() (fail_stack.avail == 0)
#define FAIL_STACK_PTR_EMPTY() (fail_stack_ptr->avail == 0)
#define FAIL_STACK_FULL() (fail_stack.avail == fail_stack.size)
@@ -1123,7 +1165,7 @@ typedef struct
/* Used to omit pushing failure point id's when we're not debugging. */
#ifdef DEBUG
#define DEBUG_PUSH PUSH_FAILURE_INT
-#define DEBUG_POP(item_addr) *(item_addr) = POP_FAILURE_INT ()
+#define DEBUG_POP(item_addr) (item_addr)->integer = POP_FAILURE_INT ()
#else
#define DEBUG_PUSH(item)
#define DEBUG_POP(item_addr)
@@ -1144,7 +1186,10 @@ typedef struct
char *destination; \
/* Must be int, so when we don't save any registers, the arithmetic \
of 0 + -1 isn't done as unsigned. */ \
- unsigned this_reg; \
+ /* Can't be int, since there is not a shred of a guarantee that int \
+ is wide enough to hold a value of something to which pointer can \
+ be assigned */ \
+ s_reg_t this_reg; \
\
DEBUG_STATEMENT (failure_id++); \
DEBUG_STATEMENT (nfailure_points_pushed++); \
@@ -1257,7 +1302,7 @@ typedef struct
#define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\
{ \
DEBUG_STATEMENT (fail_stack_elt_t failure_id;) \
- unsigned this_reg; \
+ s_reg_t this_reg; \
const unsigned char *string_temp; \
\
assert (!FAIL_STACK_EMPTY ()); \
@@ -1288,10 +1333,10 @@ typedef struct
DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend); \
\
/* Restore register info. */ \
- high_reg = (unsigned) POP_FAILURE_INT (); \
+ high_reg = (active_reg_t) POP_FAILURE_INT (); \
DEBUG_PRINT2 (" Popping high active reg: %d\n", high_reg); \
\
- low_reg = (unsigned) POP_FAILURE_INT (); \
+ low_reg = (active_reg_t) POP_FAILURE_INT (); \
DEBUG_PRINT2 (" Popping low active reg: %d\n", low_reg); \
\
if (1) \
@@ -1336,6 +1381,9 @@ typedef struct
the type of `word', i.e., is something that fits into one item on the
failure stack. */
+
+/* Declarations and macros for re_match_2. */
+
typedef union
{
fail_stack_elt_t word;
@@ -1365,7 +1413,7 @@ typedef union
{ \
if (!set_regs_matched_done) \
{ \
- unsigned r; \
+ active_reg_t r; \
set_regs_matched_done = 1; \
for (r = lowest_active_reg; r <= highest_active_reg; r++) \
{ \
@@ -1384,11 +1432,25 @@ static char reg_unset_dummy;
/* Subroutine declarations and macros for regex_compile. */
-static void store_op1 (), store_op2 ();
-static void insert_op1 (), insert_op2 ();
-static boolean at_begline_loc_p (), at_endline_loc_p ();
-static boolean group_in_compile_stack ();
-static reg_errcode_t compile_range ();
+static reg_errcode_t regex_compile _RE_ARGS ((const char *pattern, size_t size,
+ reg_syntax_t syntax,
+ struct re_pattern_buffer *bufp));
+static void store_op1 _RE_ARGS ((re_opcode_t op, unsigned char *loc, int arg));
+static void store_op2 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
+ int arg1, int arg2));
+static void insert_op1 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
+ int arg, unsigned char *end));
+static void insert_op2 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
+ int arg1, int arg2, unsigned char *end));
+static boolean at_begline_loc_p _RE_ARGS ((const char *pattern, const char *p,
+ reg_syntax_t syntax));
+static boolean at_endline_loc_p _RE_ARGS ((const char *p, const char *pend,
+ reg_syntax_t syntax));
+static reg_errcode_t compile_range _RE_ARGS ((const char **p_ptr,
+ const char *pend,
+ char *translate,
+ reg_syntax_t syntax,
+ unsigned char *b));
/* Fetch the next character in the uncompiled pattern---translating it
if necessary. Also cast from a signed character in the constant
@@ -1463,26 +1525,39 @@ static reg_errcode_t compile_range ();
/* Store a jump with opcode OP at LOC to location TO. We store a
relative address offset by the three bytes the jump itself occupies. */
#define STORE_JUMP(op, loc, to) \
- store_op1 (op, loc, (to) - (loc) - 3)
+ store_op1 (op, loc, (int) ((to) - (loc) - 3))
/* Likewise, for a two-argument jump. */
#define STORE_JUMP2(op, loc, to, arg) \
- store_op2 (op, loc, (to) - (loc) - 3, arg)
+ store_op2 (op, loc, (int) ((to) - (loc) - 3), arg)
/* Like `STORE_JUMP', but for inserting. Assume `b' is the buffer end. */
#define INSERT_JUMP(op, loc, to) \
- insert_op1 (op, loc, (to) - (loc) - 3, b)
+ insert_op1 (op, loc, (int) ((to) - (loc) - 3), b)
/* Like `STORE_JUMP2', but for inserting. Assume `b' is the buffer end. */
#define INSERT_JUMP2(op, loc, to, arg) \
- insert_op2 (op, loc, (to) - (loc) - 3, arg, b)
+ insert_op2 (op, loc, (int) ((to) - (loc) - 3), arg, b)
/* This is not an arbitrary limit: the arguments which represent offsets
into the pattern are two bytes long. So if 2^16 bytes turns out to
be too small, many things would have to change. */
+/* Any other compiler which, like MSC, has allocation limit below 2^16
+ bytes will have to use approach similar to what was done below for
+ MSC and drop MAX_BUF_SIZE a bit. Otherwise you may end up
+ reallocating to 0 bytes. Such thing is not going to work too well.
+ You have been warned!! */
+#ifdef _MSC_VER
+/* Microsoft C 16-bit versions limit malloc to approx 65512 bytes.
+ The REALLOC define eliminates a flurry of conversion warnings,
+ but is not required. */
+#define MAX_BUF_SIZE 65500L
+#define REALLOC(p,s) realloc ((p), (size_t) (s))
+#else
#define MAX_BUF_SIZE (1L << 16)
-
+#define REALLOC(p,s) realloc ((p), (s))
+#endif
/* Extend the buffer by twice its current size via realloc and
reset the pointers that pointed into the old block to point to the
@@ -1496,7 +1571,7 @@ static reg_errcode_t compile_range ();
bufp->allocated <<= 1; \
if (bufp->allocated > MAX_BUF_SIZE) \
bufp->allocated = MAX_BUF_SIZE; \
- bufp->buffer = (unsigned char *) realloc (bufp->buffer, bufp->allocated);\
+ bufp->buffer = (unsigned char *) REALLOC (bufp->buffer, bufp->allocated);\
if (bufp->buffer == NULL) \
return REG_ESPACE; \
/* If the buffer moved, move all the pointers into it. */ \
@@ -1528,7 +1603,8 @@ typedef unsigned regnum_t;
/* Since offsets can go either forwards or backwards, this type needs to
be able to hold values from -(MAX_BUF_SIZE - 1) to MAX_BUF_SIZE - 1. */
-typedef int pattern_offset_t;
+/* int may be not enough when sizeof(int) == 2. */
+typedef long pattern_offset_t;
typedef struct
{
@@ -1638,6 +1714,10 @@ regex_grow_registers (num_regs)
#endif /* not MATCH_MAY_ALLOCATE */
+static boolean group_in_compile_stack _RE_ARGS ((compile_stack_type
+ compile_stack,
+ regnum_t regnum));
+
/* `regex_compile' compiles PATTERN (of length SIZE) according to SYNTAX.
Returns one of error codes defined in `regex.h', or zero for success.
@@ -1663,7 +1743,7 @@ regex_grow_registers (num_regs)
static reg_errcode_t
regex_compile (pattern, size, syntax, bufp)
const char *pattern;
- int size;
+ size_t size;
reg_syntax_t syntax;
struct re_pattern_buffer *bufp;
{
@@ -2104,6 +2184,9 @@ regex_compile (pattern, size, syntax, bufp)
|| (is_upper && ISUPPER (ch))
|| (is_xdigit && ISXDIGIT (ch)))
SET_LIST_BIT (ch);
+ if ( translate && (is_upper || is_lower)
+ && (ISUPPER (ch) || ISLOWER (ch)))
+ SET_LIST_BIT (ch);
}
had_char_class = true;
}
@@ -2529,38 +2612,54 @@ regex_compile (pattern, size, syntax, bufp)
case 'w':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
laststart = b;
BUF_PUSH (wordchar);
break;
case 'W':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
laststart = b;
BUF_PUSH (notwordchar);
break;
case '<':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (wordbeg);
break;
case '>':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (wordend);
break;
case 'b':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (wordbound);
break;
case 'B':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (notwordbound);
break;
case '`':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (begbuf);
break;
case '\'':
+ if (re_syntax_options & RE_NO_GNU_OPS)
+ goto normal_char;
BUF_PUSH (endbuf);
break;
@@ -2575,7 +2674,7 @@ regex_compile (pattern, size, syntax, bufp)
FREE_STACK_RETURN (REG_ESUBREG);
/* Can't back reference to a subexpression if inside of it. */
- if (group_in_compile_stack (compile_stack, c1))
+ if (group_in_compile_stack (compile_stack, (regnum_t) c1))
goto normal_char;
laststart = b;
@@ -2802,7 +2901,7 @@ at_begline_loc_p (pattern, p, syntax)
static boolean
at_endline_loc_p (p, pend, syntax)
const char *p, *pend;
- int syntax;
+ reg_syntax_t syntax;
{
const char *next = p;
boolean next_backslash = *next == '\\';
@@ -2924,13 +3023,14 @@ re_compile_fastmap (bufp)
register char *fastmap = bufp->fastmap;
unsigned char *pattern = bufp->buffer;
- unsigned long size = bufp->used;
unsigned char *p = pattern;
- register unsigned char *pend = pattern + size;
+ register unsigned char *pend = pattern + bufp->used;
+#ifdef REL_ALLOC
/* This holds the pointer to the failure stack, when
it is allocated relocatably. */
fail_stack_elt_t *failure_stack_ptr;
+#endif
/* Assume that each path through the pattern can be null until
proven otherwise. We set this false at the bottom of switch
@@ -3406,13 +3506,6 @@ re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop)
return -1;
} /* re_search_2 */
-/* Declarations and macros for re_match_2. */
-
-static int bcmp_translate ();
-static boolean alt_match_null_string_p (),
- common_op_match_null_string_p (),
- group_match_null_string_p ();
-
/* This converts PTR, a pointer into one of the search strings `string1'
and `string2' into an offset from the beginning of that string. */
#define POINTER_TO_OFFSET(ptr) \
@@ -3453,14 +3546,12 @@ static boolean alt_match_null_string_p (),
: (d) == string2 - 1 ? *(end1 - 1) : *(d)) \
== Sword)
-/* Disabled due to a compiler bug -- see comment at case wordbound */
-#if 0
/* Test if the character before D and the one at D differ with respect
to being word-constituent. */
#define AT_WORD_BOUNDARY(d) \
(AT_STRINGS_BEG (d) || AT_STRINGS_END (d) \
|| WORDCHAR_P (d - 1) != WORDCHAR_P (d))
-#endif
+
/* Free everything we malloc. */
#ifdef MATCH_MAY_ALLOCATE
@@ -3506,11 +3597,26 @@ re_match (bufp, string, size, pos, regs)
{
int result = re_match_2_internal (bufp, NULL, 0, string, size,
pos, regs, size);
+#ifndef REGEX_MALLOC
+#ifdef C_ALLOCA
alloca (0);
+#endif
+#endif
return result;
}
#endif /* not emacs */
+static boolean group_match_null_string_p _RE_ARGS ((unsigned char **p,
+ unsigned char *end,
+ register_info_type *reg_info));
+static boolean alt_match_null_string_p _RE_ARGS ((unsigned char *p,
+ unsigned char *end,
+ register_info_type *reg_info));
+static boolean common_op_match_null_string_p _RE_ARGS ((unsigned char **p,
+ unsigned char *end,
+ register_info_type *reg_info));
+static int bcmp_translate _RE_ARGS ((const char *s1, const char *s2,
+ int len, char *translate));
/* re_match_2 matches the compiled pattern in BUFP against the
the (virtual) concatenation of STRING1 and STRING2 (of length SIZE1
@@ -3536,7 +3642,11 @@ re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
{
int result = re_match_2_internal (bufp, string1, size1, string2, size2,
pos, regs, stop);
+#ifndef REGEX_MALLOC
+#ifdef C_ALLOCA
alloca (0);
+#endif
+#endif
return result;
}
@@ -3593,18 +3703,20 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
unsigned nfailure_points_pushed = 0, nfailure_points_popped = 0;
#endif
+#ifdef REL_ALLOC
/* This holds the pointer to the failure stack, when
it is allocated relocatably. */
fail_stack_elt_t *failure_stack_ptr;
+#endif
/* We fill all the registers internally, independent of what we
return, for use in backreferences. The number here includes
an element for register zero. */
- unsigned num_regs = bufp->re_nsub + 1;
+ size_t num_regs = bufp->re_nsub + 1;
/* The currently active registers. */
- unsigned lowest_active_reg = NO_LOWEST_ACTIVE_REG;
- unsigned highest_active_reg = NO_HIGHEST_ACTIVE_REG;
+ active_reg_t lowest_active_reg = NO_LOWEST_ACTIVE_REG;
+ active_reg_t highest_active_reg = NO_HIGHEST_ACTIVE_REG;
/* Information on the contents of registers. These are pointers into
the input strings; they record just what was matched (on this
@@ -4511,10 +4623,17 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
= *p2 == (unsigned char) endline ? '\n' : p2[2];
#endif
+#if 0
if ((re_opcode_t) p1[3] == exactn
&& ! ((int) p2[1] * BYTEWIDTH > (int) p1[5]
&& (p2[2 + p1[5] / BYTEWIDTH]
& (1 << (p1[5] % BYTEWIDTH)))))
+#else
+ if ((re_opcode_t) p1[3] == exactn
+ && ! ((int) p2[1] * BYTEWIDTH > (int) p1[4]
+ && (p2[2 + p1[4] / BYTEWIDTH]
+ & (1 << (p1[4] % BYTEWIDTH)))))
+#endif
{
p[-3] = (unsigned char) pop_failure_jump;
DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n",
@@ -4580,7 +4699,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
actual values. Otherwise, we will restore only one
register from the stack, since lowest will == highest in
`pop_failure_point'. */
- unsigned dummy_low_reg, dummy_high_reg;
+ active_reg_t dummy_low_reg, dummy_high_reg;
unsigned char *pdummy;
const char *sdummy;
@@ -5133,11 +5252,12 @@ common_op_match_null_string_p (p, end, reg_info)
static int
bcmp_translate (s1, s2, len, translate)
- unsigned char *s1, *s2;
+ const char *s1, *s2;
register int len;
RE_TRANSLATE_TYPE translate;
{
- register unsigned char *p1 = s1, *p2 = s2;
+ register const unsigned char *p1 = (const unsigned char *) s1;
+ register const unsigned char *p2 = (const unsigned char *) s2;
while (len)
{
if (translate[*p1++] != translate[*p2++]) return 1;
@@ -5160,7 +5280,7 @@ bcmp_translate (s1, s2, len, translate)
const char *
re_compile_pattern (pattern, length, bufp)
const char *pattern;
- int length;
+ size_t length;
struct re_pattern_buffer *bufp;
{
reg_errcode_t ret;
@@ -5289,7 +5409,7 @@ regcomp (preg, pattern, cflags)
int cflags;
{
reg_errcode_t ret;
- unsigned syntax
+ reg_syntax_t syntax
= (cflags & REG_EXTENDED) ?
RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC;
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 15:30:14 +0000