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re.c
1314 lines (1137 loc) · 28 KB
/
re.c
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/************************************************
re.c -
$Author$
created at: Mon Aug 9 18:24:49 JST 1993
Copyright (C) 1993-2000 Yukihiro Matsumoto
************************************************/
#include "ruby.h"
#include "re.h"
static VALUE rb_eRegxpError;
#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
>>> "You lose. You will need a translation table for your character set." <<<
#endif
#define MIN(a,b) (((a)>(b))?(b):(a))
int
rb_str_cicmp(str1, str2)
VALUE str1, str2;
{
int len, i;
char *p1, *p2;
len = MIN(RSTRING(str1)->len, RSTRING(str2)->len);
p1 = RSTRING(str1)->ptr; p2 = RSTRING(str2)->ptr;
for (i = 0; i < len; i++, p1++, p2++) {
if (casetable[(unsigned)*p1] != casetable[(unsigned)*p2])
return casetable[(unsigned)*p1] - casetable[(unsigned)*p2];
}
return RSTRING(str1)->len - RSTRING(str2)->len;
}
#define REG_CASESTATE FL_USER0
#define REG_IGNORECASE FL_USER1
#define REG_EXTENDED FL_USER2
#define REG_POSIXLINE FL_USER3
#define KCODE_NONE 0
#define KCODE_EUC FL_USER4
#define KCODE_SJIS FL_USER5
#define KCODE_UTF8 FL_USER6
#define KCODE_FIXED FL_USER7
#define KCODE_MASK (KCODE_EUC|KCODE_SJIS|KCODE_UTF8)
static int reg_kcode = DEFAULT_KCODE;
static void
kcode_euc(reg)
struct RRegexp *reg;
{
FL_UNSET(reg, KCODE_MASK);
FL_SET(reg, KCODE_EUC);
FL_SET(reg, KCODE_FIXED);
}
static void
kcode_sjis(reg)
struct RRegexp *reg;
{
FL_UNSET(reg, KCODE_MASK);
FL_SET(reg, KCODE_SJIS);
FL_SET(reg, KCODE_FIXED);
}
static void
kcode_utf8(reg)
struct RRegexp *reg;
{
FL_UNSET(reg, KCODE_MASK);
FL_SET(reg, KCODE_UTF8);
FL_SET(reg, KCODE_FIXED);
}
static void
kcode_none(reg)
struct RRegexp *reg;
{
FL_UNSET(reg, KCODE_MASK);
FL_SET(reg, KCODE_FIXED);
}
static int curr_kcode;
static void
kcode_set_option(reg)
VALUE reg;
{
if (!FL_TEST(reg, KCODE_FIXED)) return;
curr_kcode = RBASIC(reg)->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_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;
int len;
{
const char *p, *pend;
int slash = 0;
p = s; pend = p + len;
while (p<pend) {
if (*p == '/') {
slash = 1;
break;
}
p++;
}
if (!slash) {
rb_str_cat(str, s, len);
}
else {
p = s;
while (p<pend) {
if (*p == '/') {
char c = '\\';
rb_str_cat(str, &c, 1);
rb_str_cat(str, p, 1);
}
else {
rb_str_cat(str, p, 1);
}
p++;
}
}
}
static VALUE
rb_reg_desc(s, len, re)
const char *s;
int len;
VALUE re;
{
VALUE str = rb_str_new2("/");
rb_reg_expr_str(str, s, len);
rb_str_cat(str, "/", 1);
if (re) {
if (FL_TEST(re, REG_IGNORECASE))
rb_str_cat(str, "i", 1);
if (FL_TEST(re, REG_EXTENDED))
rb_str_cat(str, "x", 1);
if (FL_TEST(re, REG_POSIXLINE))
rb_str_cat(str, "p", 1);
if (FL_TEST(re, KCODE_FIXED)) {
switch ((RBASIC(re)->flags & KCODE_MASK)) {
case KCODE_NONE:
rb_str_cat(str, "n", 1);
break;
case KCODE_EUC:
rb_str_cat(str, "e", 1);
break;
case KCODE_SJIS:
rb_str_cat(str, "s", 1);
break;
case KCODE_UTF8:
rb_str_cat(str, "u", 1);
break;
}
}
}
return str;
}
static VALUE
rb_reg_source(re)
VALUE re;
{
VALUE 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;
{
return rb_reg_desc(RREGEXP(re)->str, RREGEXP(re)->len, re);
}
static void
rb_reg_raise(s, len, err, re)
const char *s;
int 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_eRegxpError, "%s: %s", err, RSTRING(desc)->ptr);
}
static VALUE
rb_reg_casefold_p(re)
VALUE re;
{
if (FL_TEST(re, REG_IGNORECASE)) return Qtrue;
return Qfalse;
}
static VALUE
rb_reg_kcode_method(re)
VALUE re;
{
char *kcode = "$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:
break;
}
}
return rb_str_new2(kcode);
}
static Regexp*
make_regexp(s, len, flag)
const char *s;
int len, flag;
{
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 (flag) {
rp->options = flag;
}
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()
{
NEWOBJ(match, struct RMatch);
OBJSETUP(match, rb_cMatch, 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_clone(orig)
VALUE orig;
{
NEWOBJ(match, struct RMatch);
OBJSETUP(match, rb_cMatch, T_MATCH);
match->str = RMATCH(orig)->str;
match->regs = 0;
match->regs = ALLOC(struct re_registers);
match->regs->allocated = 0;
re_copy_registers(match->regs, RMATCH(orig)->regs);
CLONESETUP(match, orig);
return (VALUE)match;
}
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, busy)
VALUE match;
int busy;
{
if (busy) {
FL_SET(match, MATCH_BUSY);
}
else {
FL_UNSET(match, MATCH_BUSY);
}
}
int ruby_ignorecase;
static int may_need_recompile;
static VALUE matchcache;
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);
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);
}
}
}
int
rb_reg_search(reg, str, pos, reverse)
VALUE reg, str;
int pos, reverse;
{
int result;
VALUE match;
struct re_registers *regs = 0;
int range;
if (pos > RSTRING(str)->len) return -1;
if (may_need_recompile)
rb_reg_prepare_re(reg);
if (FL_TEST(reg, KCODE_FIXED))
kcode_set_option(reg);
else if (reg_kcode != curr_kcode)
kcode_reset_option();
if (rb_thread_scope_shared_p()) {
match = Qnil;
}
else {
match = rb_backref_get();
}
if (NIL_P(match) || FL_TEST(match, MATCH_BUSY)) {
if (matchcache) {
match = matchcache;
matchcache = 0;
}
else {
match = match_alloc();
}
}
regs = RMATCH(match)->regs;
if (reverse) {
range = -pos;
}
else {
range = RSTRING(str)->len - pos;
}
result = re_search(RREGEXP(reg)->ptr,RSTRING(str)->ptr,RSTRING(str)->len,
pos, range, regs);
if (FL_TEST(reg, KCODE_FIXED))
kcode_reset_option();
if (result == -2) {
rb_reg_raise(RREGEXP(reg)->str, RREGEXP(reg)->len,
"Stack overflow in regexp matcher", reg);
}
if (result < 0) {
matchcache = match;
rb_backref_set(Qnil);
}
else {
RMATCH(match)->str = rb_str_new4(str);
rb_backref_set(match);
}
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 Qfalse;
}
if (RMATCH(match)->BEG(nth) == -1) return Qfalse;
return Qtrue;
}
VALUE
rb_reg_nth_match(nth, match)
int nth;
VALUE match;
{
int start, end, len;
if (NIL_P(match)) return Qnil;
if (nth >= RMATCH(match)->regs->num_regs) {
return Qnil;
}
start = RMATCH(match)->BEG(nth);
if (start == -1) return Qnil;
end = RMATCH(match)->END(nth);
len = end - start;
return rb_str_new(RSTRING(RMATCH(match)->str)->ptr + start, len);
}
VALUE
rb_reg_last_match(match)
VALUE match;
{
return rb_reg_nth_match(0, match);
}
VALUE
rb_reg_match_pre(match)
VALUE match;
{
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
return rb_str_new(RSTRING(RMATCH(match)->str)->ptr, RMATCH(match)->BEG(0));
}
VALUE
rb_reg_match_post(match)
VALUE match;
{
if (NIL_P(match)) return Qnil;
if (RMATCH(match)->BEG(0) == -1) return Qnil;
return rb_str_new(RSTRING(RMATCH(match)->str)->ptr+RMATCH(match)->END(0),
RSTRING(RMATCH(match)->str)->len-RMATCH(match)->END(0));
}
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);
char *ptr = RSTRING(RMATCH(match)->str)->ptr;
int i;
for (i=0; i<regs->num_regs; i++) {
if (regs->beg[i] == -1) rb_ary_push(ary, Qnil);
else rb_ary_push(ary, rb_str_new(ptr+regs->beg[i],
regs->end[i]-regs->beg[i]));
}
return ary;
}
static VALUE
match_aref(argc, argv, match)
int argc;
VALUE *argv;
VALUE match;
{
VALUE idx, rest;
struct re_registers *regs;
char *ptr;
int i;
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));
}
regs = RMATCH(match)->regs;
i = FIX2INT(idx);
if (i >= regs->num_regs) return Qnil;
ptr = RSTRING(RMATCH(match)->str)->ptr;
return rb_str_new(ptr+regs->beg[i], regs->end[i]-regs->beg[i]);
}
static VALUE
match_to_s(match)
VALUE match;
{
VALUE str = rb_reg_last_match(match);
if (NIL_P(str)) return rb_str_new(0,0);
return str;
}
static VALUE
match_string(match)
VALUE match;
{
return RMATCH(match)->str; /* str is frozen */
}
VALUE rb_cRegexp;
static VALUE
rb_reg_new_1(klass, s, len, options)
VALUE klass;
const char *s;
int len;
int options; /* CASEFOLD = 1 */
/* EXTENDED = 2 */
/* POSIXLINE = 4 */
/* CODE_NONE = 8 */
/* CODE_EUC = 16 */
/* CODE_SJIS = 24 */
/* CODE_UTF8 = 32 */
{
NEWOBJ(re, struct RRegexp);
OBJSETUP(re, klass, T_REGEXP);
re->ptr = 0;
re->str = 0;
if (options & RE_OPTION_IGNORECASE) {
FL_SET(re, REG_IGNORECASE);
}
if (options & RE_OPTION_EXTENDED) {
FL_SET(re, REG_EXTENDED);
}
if (options & RE_OPTION_POSIXLINE) {
FL_SET(re, REG_POSIXLINE);
}
switch (options & ~0x7) {
case 0:
default:
FL_SET(re, reg_kcode);
break;
case 8:
kcode_none(re);
break;
case 16:
kcode_euc(re);
break;
case 24:
kcode_sjis(re);
break;
case 32:
kcode_utf8(re);
break;
}
if (options & ~0x7) {
kcode_set_option((VALUE)re);
}
if (ruby_ignorecase) {
options |= RE_OPTION_IGNORECASE;
FL_SET(re, REG_CASESTATE);
}
re->ptr = make_regexp(s, len, options & 0x7);
re->str = ALLOC_N(char, len+1);
memcpy(re->str, s, len);
re->str[len] = '\0';
re->len = len;
if (options & ~0x7) {
kcode_reset_option();
}
return (VALUE)re;
}
VALUE
rb_reg_new(s, len, options)
const char *s;
long len;
int options;
{
return rb_reg_new_1(rb_cRegexp, s, len, options);
}
static int case_cache;
static int kcode_cache;
static VALUE reg_cache;
VALUE
rb_reg_regcomp(str)
VALUE str;
{
if (reg_cache && RREGEXP(reg_cache)->len == RSTRING(str)->len
&& case_cache == ruby_ignorecase
&& kcode_cache == reg_kcode
&& memcmp(RREGEXP(reg_cache)->str, RSTRING(str)->ptr, RSTRING(str)->len) == 0)
return reg_cache;
case_cache = ruby_ignorecase;
kcode_cache = reg_kcode;
return reg_cache = rb_reg_new(RSTRING(str)->ptr, RSTRING(str)->len,
ruby_ignorecase);
}
static int
rb_reg_cur_kcode(re)
VALUE re;
{
if (FL_TEST(re, KCODE_FIXED)) {
return RBASIC(re)->flags & KCODE_MASK;
}
return 0;
}
static VALUE
rb_reg_equal(re1, re2)
VALUE re1, re2;
{
int min;
if (re1 == re2) return Qtrue;
if (TYPE(re2) != T_REGEXP) return Qfalse;
if (RREGEXP(re1)->len != RREGEXP(re2)->len) return Qfalse;
min = RREGEXP(re1)->len;
if (min > RREGEXP(re2)->len) min = RREGEXP(re2)->len;
if (memcmp(RREGEXP(re1)->str, RREGEXP(re2)->str, min) == 0 &&
rb_reg_cur_kcode(re1) == rb_reg_cur_kcode(re2) &&
!(FL_TEST(re1,REG_IGNORECASE) ^ FL_TEST(re2,REG_IGNORECASE))) {
return Qtrue;
}
return Qfalse;
}
VALUE
rb_reg_match(re, str)
VALUE re, str;
{
int start;
if (NIL_P(str)) return Qnil;
str = rb_str_to_str(str);
start = rb_reg_search(re, str, 0, 0);
if (start < 0) {
return Qnil;
}
return INT2FIX(start);
}
VALUE
rb_reg_match2(re)
VALUE re;
{
int start;
VALUE line = rb_lastline_get();
if (TYPE(line) != T_STRING)
return Qnil;
start = rb_reg_search(re, line, 0, 0);
if (start < 0) {
return Qnil;
}
return INT2FIX(start);
}
static VALUE
rb_reg_match_method(re, str)
VALUE re, str;
{
VALUE result = rb_reg_match(re, str);
if (NIL_P(result)) return Qnil;
result = rb_backref_get();
rb_match_busy(result, Qtrue);
return result;
}
static VALUE
rb_reg_s_new(argc, argv, self)
int argc;
VALUE *argv;
VALUE self;
{
VALUE src;
int flag = 0;
if (argc == 0 || argc > 3) {
rb_raise(rb_eArgError, "wrong # of argument");
}
if (argc >= 2) {
if (FIXNUM_P(argv[1])) flag = FIX2INT(argv[1]);
else if (RTEST(argv[1])) flag = RE_OPTION_IGNORECASE;
}
if (argc == 3) {
char *kcode = STR2CSTR(argv[2]);
switch (kcode[0]) {
case 'n': case 'N':
flag |= 8;
break;
case 'e': case 'E':
flag |= 16;
break;
case 's': case 'S':
flag |= 24;
break;
case 'u': case 'U':
flag |= 32;
break;
default:
break;
}
}
src = argv[0];
if (TYPE(src) == T_REGEXP) {
return rb_reg_new_1(self, RREGEXP(src)->str, RREGEXP(src)->len, flag);
}
else {
char *p;
int len;
p = str2cstr(src, &len);
return rb_reg_new_1(self, p, len, flag);
}
}
static VALUE
rb_reg_s_quote(argc, argv)
int argc;
VALUE *argv;
{
VALUE str, kcode;
int kcode_saved = reg_kcode;
char *s, *send, *t;
char *tmp;
int len;
rb_scan_args(argc, argv, "11", &str, &kcode);
if (!NIL_P(kcode)) {
rb_set_kcode(STR2CSTR(kcode));
curr_kcode = reg_kcode;
reg_kcode = kcode_saved;
}
s = str2cstr(str, &len);
send = s + len;
tmp = ALLOCA_N(char, len*2);
t = tmp;
for (; s < send; s++) {
if (ismbchar(*s)) {
size_t n = mbclen(*s);
while (n-- && s < send)
*t++ = *s++;
s--;
continue;
}
if (*s == '[' || *s == ']'
|| *s == '{' || *s == '}'
|| *s == '(' || *s == ')'
|| *s == '|' || *s == '-'
|| *s == '*' || *s == '.' || *s == '\\'