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re.c
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re.c
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/**********************************************************************
re.c -
$Author$
created at: Mon Aug 9 18:24:49 JST 1993
Copyright (C) 1993-2003 Yukihiro Matsumoto
**********************************************************************/
#include "ruby.h"
#include "re.h"
#include <ctype.h>
static VALUE rb_eRegexpError;
#define BEG(no) regs->beg[no]
#define END(no) regs->end[no]
#if 'a' == 97 /* it's ascii */
static const char casetable[] = {
'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
/* ' ' '!' '"' '#' '$' '%' '&' ''' */
'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
/* '(' ')' '*' '+' ',' '-' '.' '/' */
'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
/* '0' '1' '2' '3' '4' '5' '6' '7' */
'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
/* '8' '9' ':' ';' '<' '=' '>' '?' */
'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
/* '@' 'A' 'B' 'C' 'D' 'E' 'F' 'G' */
'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/* 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' */
'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/* 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' */
'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/* 'X' 'Y' 'Z' '[' '\' ']' '^' '_' */
'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
/* '`' 'a' 'b' 'c' 'd' 'e' 'f' 'g' */
'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/* 'h' 'i' 'j' 'k' 'l' 'm' 'n' 'o' */
'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/* 'p' 'q' 'r' 's' 't' 'u' 'v' 'w' */
'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/* 'x' 'y' 'z' '{' '|' '}' '~' */
'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
'\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
'\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
'\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
'\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
};
#else
# error >>> "You lose. You will need a translation table for your character set." <<<
#endif
#define MIN(a,b) (((a)>(b))?(b):(a))
int
rb_memcicmp(p1, p2, len)
char *p1, *p2;
long len;
{
int tmp;
while (len--) {
if (tmp = casetable[(unsigned)*p1++] - casetable[(unsigned)*p2++])
return tmp;
}
return 0;
}
int
rb_memcmp(p1, p2, len)
char *p1, *p2;
long len;
{
if (!ruby_ignorecase) {
return memcmp(p1, p2, len);
}
return rb_memcicmp(p1, p2, len);
}
long
rb_memsearch(x0, m, y0, n)
char *x0, *y0;
long m, n;
{
unsigned char *x = x0, *y = y0;
unsigned char *s, *e;
long i;
int d;
unsigned long hx, hy;
#define KR_REHASH(a, b, h) (((h) << 1) - ((a)<<d) + (b))
s = y; e = s + n - m + 1;
/* Preprocessing */
/* computes d = 2^(m-1) with
the left-shift operator */
d = sizeof(hx) * CHAR_BIT - 1;
if (d > m) d = m;
if (ruby_ignorecase) {
/* Prepare hash value */
for (hy = hx = i = 0; i < d; ++i) {
hx = KR_REHASH(0, casetable[x[i]], hx);
hy = KR_REHASH(0, casetable[s[i]], hy);
}
/* Searching */
while (s < e) {
if (hx == hy && rb_memcicmp(x, s, m) == 0) {
return s-y;
}
hy = KR_REHASH(casetable[*s], casetable[*(s+d)], hy);
s++;
}
}
else {
/* Prepare hash value */
for (hy = hx = i = 0; i < d; ++i) {
hx = KR_REHASH(0, x[i], hx);
hy = KR_REHASH(0, s[i], hy);
}
/* Searching */
while (s < e) {
if (hx == hy && memcmp(x, s, m) == 0) {
return s-y;
}
hy = KR_REHASH(*s, *(s+d), hy);
s++;
}
}
return -1;
}
#define REG_CASESTATE FL_USER0
#define KCODE_NONE 0
#define KCODE_EUC FL_USER1
#define KCODE_SJIS FL_USER2
#define KCODE_UTF8 FL_USER3
#define KCODE_FIXED FL_USER4
#define KCODE_MASK (KCODE_EUC|KCODE_SJIS|KCODE_UTF8)
static int reg_kcode = DEFAULT_KCODE;
static void
kcode_euc(re)
struct RRegexp *re;
{
FL_UNSET(re, KCODE_MASK);
FL_SET(re, KCODE_EUC);
FL_SET(re, KCODE_FIXED);
}
static void
kcode_sjis(re)
struct RRegexp *re;
{
FL_UNSET(re, KCODE_MASK);
FL_SET(re, KCODE_SJIS);
FL_SET(re, KCODE_FIXED);
}
static void
kcode_utf8(re)
struct RRegexp *re;
{
FL_UNSET(re, KCODE_MASK);
FL_SET(re, KCODE_UTF8);
FL_SET(re, KCODE_FIXED);
}
static void
kcode_none(re)
struct RRegexp *re;
{
FL_UNSET(re, KCODE_MASK);
FL_SET(re, KCODE_FIXED);
}
static int curr_kcode;
static void
kcode_set_option(re)
VALUE re;
{
if (!FL_TEST(re, KCODE_FIXED)) return;
curr_kcode = RBASIC(re)->flags & KCODE_MASK;
if (reg_kcode == curr_kcode) return;
switch (curr_kcode) {
case KCODE_NONE:
re_mbcinit(MBCTYPE_ASCII);
break;
case KCODE_EUC:
re_mbcinit(MBCTYPE_EUC);
break;
case KCODE_SJIS:
re_mbcinit(MBCTYPE_SJIS);
break;
case KCODE_UTF8:
re_mbcinit(MBCTYPE_UTF8);
break;
}
}
static void
kcode_reset_option()
{
if (reg_kcode == curr_kcode) return;
switch (reg_kcode) {
case KCODE_NONE:
re_mbcinit(MBCTYPE_ASCII);
break;
case KCODE_EUC:
re_mbcinit(MBCTYPE_EUC);
break;
case KCODE_SJIS:
re_mbcinit(MBCTYPE_SJIS);
break;
case KCODE_UTF8:
re_mbcinit(MBCTYPE_UTF8);
break;
}
}
int
rb_reg_mbclen2(c, re)
unsigned int c;
VALUE re;
{
int len;
if (!FL_TEST(re, KCODE_FIXED))
return mbclen(c);
kcode_set_option(re);
len = mbclen(c);
kcode_reset_option();
return len;
}
static void
rb_reg_check(re)
VALUE re;
{
if (!RREGEXP(re)->ptr || !RREGEXP(re)->str) {
rb_raise(rb_eTypeError, "uninitialized Regexp");
}
}
extern int ruby_in_compile;
static void
rb_reg_expr_str(str, s, len)
VALUE str;
const char *s;
long len;
{
const char *p, *pend;
int need_escape = 0;
p = s; pend = p + len;
while (p<pend) {
if (*p == '/' || (!ISPRINT(*p) && !ismbchar(*p))) {
need_escape = 1;
break;
}
p += mbclen(*p);
}
if (!need_escape) {
rb_str_buf_cat(str, s, len);
}
else {
p = s;
while (p<pend) {
if (*p == '\\') {
int n = mbclen(p[1]) + 1;
rb_str_buf_cat(str, p, n);
p += n;
continue;
}
else if (*p == '/') {
char c = '\\';
rb_str_buf_cat(str, &c, 1);
rb_str_buf_cat(str, p, 1);
}
else if (ismbchar(*p)) {
rb_str_buf_cat(str, p, mbclen(*p));
p += mbclen(*p);
continue;
}
else if (ISPRINT(*p)) {
rb_str_buf_cat(str, p, 1);
}
else if (!ISSPACE(*p)) {
char b[8];
sprintf(b, "\\%03o", *p & 0377);
rb_str_buf_cat(str, b, 4);
}
else {
rb_str_buf_cat(str, p, 1);
}
p++;
}
}
}
static VALUE
rb_reg_desc(s, len, re)
const char *s;
long len;
VALUE re;
{
VALUE str = rb_str_buf_new2("/");
rb_reg_expr_str(str, s, len);
rb_str_buf_cat2(str, "/");
if (re) {
rb_reg_check(re);
if (RREGEXP(re)->ptr->options & RE_OPTION_MULTILINE)
rb_str_buf_cat2(str, "m");
if (RREGEXP(re)->ptr->options & RE_OPTION_IGNORECASE)
rb_str_buf_cat2(str, "i");
if (RREGEXP(re)->ptr->options & RE_OPTION_EXTENDED)
rb_str_buf_cat2(str, "x");
if (FL_TEST(re, KCODE_FIXED)) {
switch ((RBASIC(re)->flags & KCODE_MASK)) {
case KCODE_NONE:
rb_str_buf_cat2(str, "n");
break;
case KCODE_EUC:
rb_str_buf_cat2(str, "e");
break;
case KCODE_SJIS:
rb_str_buf_cat2(str, "s");
break;
case KCODE_UTF8:
rb_str_buf_cat2(str, "u");
break;
}
}
}
OBJ_INFECT(str, re);
return str;
}
static VALUE
rb_reg_source(re)
VALUE re;
{
VALUE str;
rb_reg_check(re);
str = rb_str_new(RREGEXP(re)->str,RREGEXP(re)->len);
if (OBJ_TAINTED(re)) OBJ_TAINT(str);
return str;
}
static VALUE
rb_reg_inspect(re)
VALUE re;
{
rb_reg_check(re);
return rb_reg_desc(RREGEXP(re)->str, RREGEXP(re)->len, re);
}
static VALUE
rb_reg_to_s(re)
VALUE re;
{
int options;
const int embeddable = RE_OPTION_MULTILINE|RE_OPTION_IGNORECASE|RE_OPTION_EXTENDED;
long len;
const char* ptr;
VALUE str = rb_str_buf_new2("(?");
rb_reg_check(re);
options = RREGEXP(re)->ptr->options;
ptr = RREGEXP(re)->str;
len = RREGEXP(re)->len;
again:
if (len >= 4 && ptr[0] == '(' && ptr[1] == '?') {
int err = 1;
ptr += 2;
if ((len -= 2) > 0) {
do {
if (*ptr == 'm') {
options |= RE_OPTION_MULTILINE;
}
else if (*ptr == 'i') {
options |= RE_OPTION_IGNORECASE;
}
else if (*ptr == 'x') {
options |= RE_OPTION_EXTENDED;
}
else break;
++ptr;
} while (--len > 0);
}
if (len > 1 && *ptr == '-') {
++ptr;
--len;
do {
if (*ptr == 'm') {
options &= ~RE_OPTION_MULTILINE;
}
else if (*ptr == 'i') {
options &= ~RE_OPTION_IGNORECASE;
}
else if (*ptr == 'x') {
options &= ~RE_OPTION_EXTENDED;
}
else break;
++ptr;
} while (--len > 0);
}
if (*ptr == ')') {
--len;
++ptr;
goto again;
}
if (*ptr == ':' && ptr[len-1] == ')') {
Regexp *rp;
kcode_set_option(re);
rp = ALLOC(Regexp);
MEMZERO((char *)rp, Regexp, 1);
err = re_compile_pattern(++ptr, len -= 2, rp) != 0;
kcode_reset_option();
re_free_pattern(rp);
}
if (err) {
options = RREGEXP(re)->ptr->options;
ptr = RREGEXP(re)->str;
len = RREGEXP(re)->len;
}
}
if (options & RE_OPTION_MULTILINE) rb_str_buf_cat2(str, "m");
if (options & RE_OPTION_IGNORECASE) rb_str_buf_cat2(str, "i");
if (options & RE_OPTION_EXTENDED) rb_str_buf_cat2(str, "x");
if ((options & embeddable) != embeddable) {
rb_str_buf_cat2(str, "-");
if (!(options & RE_OPTION_MULTILINE)) rb_str_buf_cat2(str, "m");
if (!(options & RE_OPTION_IGNORECASE)) rb_str_buf_cat2(str, "i");
if (!(options & RE_OPTION_EXTENDED)) rb_str_buf_cat2(str, "x");
}
rb_str_buf_cat2(str, ":");
rb_reg_expr_str(str, ptr, len);
rb_str_buf_cat2(str, ")");
OBJ_INFECT(str, re);
return str;
}
static void
rb_reg_raise(s, len, err, re)
const char *s;
long len;
const char *err;
VALUE re;
{
VALUE desc = rb_reg_desc(s, len, re);
if (ruby_in_compile)
rb_compile_error("%s: %s", err, RSTRING(desc)->ptr);
else
rb_raise(rb_eRegexpError, "%s: %s", err, RSTRING(desc)->ptr);
}
static VALUE
rb_reg_casefold_p(re)
VALUE re;
{
rb_reg_check(re);
if (RREGEXP(re)->ptr->options & RE_OPTION_IGNORECASE) return Qtrue;
return Qfalse;
}
static VALUE
rb_reg_options_m(re)
VALUE re;
{
rb_reg_check(re);
return INT2NUM(RREGEXP(re)->ptr->options);
}
static VALUE
rb_reg_kcode_m(re)
VALUE re;
{
char *kcode;
if (FL_TEST(re, KCODE_FIXED)) {
switch (RBASIC(re)->flags & KCODE_MASK) {
case KCODE_NONE:
kcode = "none"; break;
case KCODE_EUC:
kcode = "euc"; break;
case KCODE_SJIS:
kcode = "sjis"; break;
case KCODE_UTF8:
kcode = "utf8"; break;
default:
rb_bug("unknown kcode - should not happen");
break;
}
return rb_str_new2(kcode);
}
return Qnil;
}
static Regexp*
make_regexp(s, len, flags)
const char *s;
long len;
int flags;
{
Regexp *rp;
char *err;
/* Handle escaped characters first. */
/* Build a copy of the string (in dest) with the
escaped characters translated, and generate the regex
from that.
*/
rp = ALLOC(Regexp);
MEMZERO((char *)rp, Regexp, 1);
rp->buffer = ALLOC_N(char, 16);
rp->allocated = 16;
rp->fastmap = ALLOC_N(char, 256);
if (flags) {
rp->options = flags;
}
err = re_compile_pattern(s, len, rp);
if (err != NULL) {
rb_reg_raise(s, len, err, 0);
}
return rp;
}
static VALUE rb_cMatch;
static VALUE match_alloc _((VALUE));
static VALUE
match_alloc(klass)
VALUE klass;
{
NEWOBJ(match, struct RMatch);
OBJSETUP(match, klass, T_MATCH);
match->str = 0;
match->regs = 0;
match->regs = ALLOC(struct re_registers);
MEMZERO(match->regs, struct re_registers, 1);
return (VALUE)match;
}
static VALUE
match_copy_object(obj, orig)
VALUE obj, orig;
{
if (obj == orig) return obj;
if (!rb_obj_is_instance_of(orig, rb_obj_class(obj))) {
rb_raise(rb_eTypeError, "wrong argument class");
}
RMATCH(obj)->str = RMATCH(orig)->str;
re_free_registers(RMATCH(obj)->regs);
RMATCH(obj)->regs->allocated = 0;
re_copy_registers(RMATCH(obj)->regs, RMATCH(orig)->regs);
return obj;
}
static VALUE
match_size(match)
VALUE match;
{
return INT2FIX(RMATCH(match)->regs->num_regs);
}
static VALUE
match_offset(match, n)
VALUE match, n;
{
int i = NUM2INT(n);
if (i < 0 || RMATCH(match)->regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (RMATCH(match)->regs->beg[i] < 0)
return rb_assoc_new(Qnil, Qnil);
return rb_assoc_new(INT2FIX(RMATCH(match)->regs->beg[i]),
INT2FIX(RMATCH(match)->regs->end[i]));
}
static VALUE
match_begin(match, n)
VALUE match, n;
{
int i = NUM2INT(n);
if (i < 0 || RMATCH(match)->regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (RMATCH(match)->regs->beg[i] < 0)
return Qnil;
return INT2FIX(RMATCH(match)->regs->beg[i]);
}
static VALUE
match_end(match, n)
VALUE match, n;
{
int i = NUM2INT(n);
if (i < 0 || RMATCH(match)->regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (RMATCH(match)->regs->beg[i] < 0)
return Qnil;
return INT2FIX(RMATCH(match)->regs->end[i]);
}
#define MATCH_BUSY FL_USER2
void
rb_match_busy(match)
VALUE match;
{
FL_SET(match, MATCH_BUSY);
}
int ruby_ignorecase;
static int may_need_recompile;
static void
rb_reg_prepare_re(re)
VALUE re;
{
int need_recompile = 0;
int state;
rb_reg_check(re);
state = FL_TEST(re, REG_CASESTATE);
/* ignorecase status */
if (ruby_ignorecase && !state) {
FL_SET(re, REG_CASESTATE);
RREGEXP(re)->ptr->options |= RE_OPTION_IGNORECASE;
need_recompile = 1;
}
if (!ruby_ignorecase && state) {
FL_UNSET(re, REG_CASESTATE);
RREGEXP(re)->ptr->options &= ~RE_OPTION_IGNORECASE;
need_recompile = 1;
}
if (!FL_TEST(re, KCODE_FIXED) &&
(RBASIC(re)->flags & KCODE_MASK) != reg_kcode) {
need_recompile = 1;
RBASIC(re)->flags &= ~KCODE_MASK;
RBASIC(re)->flags |= reg_kcode;
}
if (need_recompile) {
char *err;
if (FL_TEST(re, KCODE_FIXED))
kcode_set_option(re);
rb_reg_check(re);
RREGEXP(re)->ptr->fastmap_accurate = 0;
err = re_compile_pattern(RREGEXP(re)->str, RREGEXP(re)->len, RREGEXP(re)->ptr);
if (err != NULL) {
rb_reg_raise(RREGEXP(re)->str, RREGEXP(re)->len, err, re);
}
}
}
long
rb_reg_adjust_startpos(re, str, pos, reverse)
VALUE re, str;
long pos, reverse;
{
long range;
rb_reg_check(re);
if (may_need_recompile) rb_reg_prepare_re(re);
if (FL_TEST(re, KCODE_FIXED))
kcode_set_option(re);
else if (reg_kcode != curr_kcode)
kcode_reset_option();
if (reverse) {
range = -pos;
}
else {
range = RSTRING(str)->len - pos;
}
return re_adjust_startpos(RREGEXP(re)->ptr,
RSTRING(str)->ptr, RSTRING(str)->len,
pos, range);
}
long
rb_reg_search(re, str, pos, reverse)
VALUE re, str;
long pos, reverse;
{
long result;
VALUE match;
static struct re_registers regs;
long range;
if (pos > RSTRING(str)->len || pos < 0) {
rb_backref_set(Qnil);
return -1;
}
rb_reg_check(re);
if (may_need_recompile) rb_reg_prepare_re(re);
if (FL_TEST(re, KCODE_FIXED))
kcode_set_option(re);
else if (reg_kcode != curr_kcode)
kcode_reset_option();
if (reverse) {
range = -pos;
}
else {
range = RSTRING(str)->len - pos;
}
result = re_search(RREGEXP(re)->ptr,RSTRING(str)->ptr,RSTRING(str)->len,
pos, range, ®s);
if (FL_TEST(re, KCODE_FIXED))
kcode_reset_option();
if (result == -2) {
rb_reg_raise(RREGEXP(re)->str, RREGEXP(re)->len,
"Stack overflow in regexp matcher", re);
}
if (result < 0) {
rb_backref_set(Qnil);
return result;
}
match = rb_backref_get();
if (NIL_P(match) || FL_TEST(match, MATCH_BUSY)) {
match = match_alloc(rb_cMatch);
}
else {
if (rb_safe_level() >= 3)
OBJ_TAINT(match);
else
FL_UNSET(match, FL_TAINT);
}
re_copy_registers(RMATCH(match)->regs, ®s);
RMATCH(match)->str = rb_str_new4(str);
rb_backref_set(match);
OBJ_INFECT(match, re);
OBJ_INFECT(match, str);
return result;
}
VALUE
rb_reg_nth_defined(nth, match)
int nth;
VALUE match;
{
if (NIL_P(match)) return Qnil;
if (nth >= RMATCH(match)->regs->num_regs) {
return Qnil;
}
if (nth < 0) {
nth += RMATCH(match)->regs->num_regs;
if (nth <= 0) return Qnil;
}
if (RMATCH(match)->BEG(nth) == -1) return Qfalse;
return Qtrue;
}
VALUE
rb_reg_nth_match(nth, match)
int nth;
VALUE match;
{
VALUE str;
long start, end, len;
if (NIL_P(match)) return Qnil;
if (nth >= RMATCH(match)->regs->num_regs) {
return Qnil;
}
if (nth < 0) {
nth += RMATCH(match)->regs->num_regs;
if (nth <= 0) return Qnil;
}
start = RMATCH(match)->BEG(nth);
if (start == -1) return Qnil;
end = RMATCH(match)->END(nth);
len = end - start;
str = rb_str_substr(RMATCH(match)->str, start, len);
OBJ_INFECT(str, match);
return str;
}
VALUE
rb_reg_last_match(match)
VALUE match;
{
return rb_reg_nth_match(0, match);
}
VALUE
rb_reg_match_pre(match)
VALUE match;
{
VALUE str;
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
str = rb_str_substr(RMATCH(match)->str, 0, RMATCH(match)->BEG(0));
if (OBJ_TAINTED(match)) OBJ_TAINT(str);
return str;
}
VALUE
rb_reg_match_post(match)
VALUE match;
{
VALUE str;
long pos;
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
str = RMATCH(match)->str;
pos = RMATCH(match)->END(0);
str = rb_str_substr(str, pos, RSTRING(str)->len - pos);
if (OBJ_TAINTED(match)) OBJ_TAINT(str);
return str;
}
VALUE
rb_reg_match_last(match)
VALUE match;
{
int i;
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
for (i=RMATCH(match)->regs->num_regs-1; RMATCH(match)->BEG(i) == -1 && i > 0; i--)
;
if (i == 0) return Qnil;
return rb_reg_nth_match(i, match);
}
static VALUE
last_match_getter()
{
return rb_reg_last_match(rb_backref_get());
}
static VALUE
prematch_getter()
{
return rb_reg_match_pre(rb_backref_get());
}
static VALUE
postmatch_getter()
{
return rb_reg_match_post(rb_backref_get());
}
static VALUE
last_paren_match_getter()
{
return rb_reg_match_last(rb_backref_get());
}
static VALUE
match_to_a(match)
VALUE match;
{
struct re_registers *regs = RMATCH(match)->regs;
VALUE ary = rb_ary_new2(regs->num_regs);
VALUE target = RMATCH(match)->str;
int i;
int taint = OBJ_TAINTED(match);
for (i=0; i<regs->num_regs; i++) {
if (regs->beg[i] == -1) {
rb_ary_push(ary, Qnil);
}
else {
VALUE str = rb_str_substr(target, regs->beg[i], regs->end[i]-regs->beg[i]);
if (taint) OBJ_TAINT(str);
rb_ary_push(ary, str);
}
}
return ary;
}
static VALUE
match_aref(argc, argv, match)
int argc;
VALUE *argv;
VALUE match;
{
VALUE idx, rest;
rb_scan_args(argc, argv, "11", &idx, &rest);
if (!NIL_P(rest) || !FIXNUM_P(idx) || FIX2INT(idx) < 0) {
return rb_ary_aref(argc, argv, match_to_a(match));
}
return rb_reg_nth_match(FIX2INT(idx), match);
}
static VALUE
match_select(argc, argv, match)
int argc;
VALUE *argv;
VALUE match;
{
struct re_registers *regs = RMATCH(match)->regs;
VALUE target = RMATCH(match)->str;
VALUE result = rb_ary_new();
int i;
long idx;
int taint = OBJ_TAINTED(match);
for (i=0; i<argc; i++) {
idx = NUM2LONG(argv[i]);
if (idx < 0) idx += regs->num_regs;
if (idx < 0 || regs->num_regs <= idx) {
rb_ary_push(result, Qnil);
}
else {
VALUE str = rb_str_substr(target, regs->beg[idx], regs->end[idx]-regs->beg[idx]);
if (taint) OBJ_TAINT(str);
rb_ary_push(result, str);
}
}
return result;
}
static VALUE
match_to_s(match)
VALUE match;
{
VALUE str = rb_reg_last_match(match);
if (NIL_P(str)) str = rb_str_new(0,0);
if (OBJ_TAINTED(match)) OBJ_TAINT(str);
if (OBJ_TAINTED(RMATCH(match)->str)) OBJ_TAINT(str);
return str;
}
static VALUE
match_string(match)
VALUE match;
{
return RMATCH(match)->str; /* str is frozen */
}