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/**********************************************************************
re.c -
$Author$
created at: Mon Aug 9 18:24:49 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
#include "ruby/internal/config.h"
#include <ctype.h>
#include "encindex.h"
#include "internal.h"
#include "internal/hash.h"
#include "internal/imemo.h"
#include "internal/re.h"
#include "internal/string.h"
#include "internal/variable.h"
#include "regint.h"
#include "ruby/encoding.h"
#include "ruby/re.h"
#include "ruby/util.h"
VALUE rb_eRegexpError;
typedef char onig_errmsg_buffer[ONIG_MAX_ERROR_MESSAGE_LEN];
#define errcpy(err, msg) strlcpy((err), (msg), ONIG_MAX_ERROR_MESSAGE_LEN)
#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
int
rb_memcicmp(const void *x, const void *y, long len)
{
const unsigned char *p1 = x, *p2 = y;
int tmp;
while (len--) {
if ((tmp = casetable[(unsigned)*p1++] - casetable[(unsigned)*p2++]))
return tmp;
}
return 0;
}
#ifdef HAVE_MEMMEM
static inline long
rb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *y;
if ((y = memmem(ys, n, xs, m)) != NULL)
return y - ys;
else
return -1;
}
#else
static inline long
rb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *x = xs, *xe = xs + m;
const unsigned char *y = ys, *ye = ys + n;
#define VALUE_MAX ((VALUE)~(VALUE)0)
VALUE hx, hy, mask = VALUE_MAX >> ((SIZEOF_VALUE - m) * CHAR_BIT);
if (m > SIZEOF_VALUE)
rb_bug("!!too long pattern string!!");
if (!(y = memchr(y, *x, n - m + 1)))
return -1;
/* Prepare hash value */
for (hx = *x++, hy = *y++; x < xe; ++x, ++y) {
hx <<= CHAR_BIT;
hy <<= CHAR_BIT;
hx |= *x;
hy |= *y;
}
/* Searching */
while (hx != hy) {
if (y == ye)
return -1;
hy <<= CHAR_BIT;
hy |= *y;
hy &= mask;
y++;
}
return y - ys - m;
}
#endif
static inline long
rb_memsearch_qs(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *x = xs, *xe = xs + m;
const unsigned char *y = ys;
VALUE i, qstable[256];
/* Preprocessing */
for (i = 0; i < 256; ++i)
qstable[i] = m + 1;
for (; x < xe; ++x)
qstable[*x] = xe - x;
/* Searching */
for (; y + m <= ys + n; y += *(qstable + y[m])) {
if (*xs == *y && memcmp(xs, y, m) == 0)
return y - ys;
}
return -1;
}
static inline unsigned int
rb_memsearch_qs_utf8_hash(const unsigned char *x)
{
register const unsigned int mix = 8353;
register unsigned int h = *x;
if (h < 0xC0) {
return h + 256;
}
else if (h < 0xE0) {
h *= mix;
h += x[1];
}
else if (h < 0xF0) {
h *= mix;
h += x[1];
h *= mix;
h += x[2];
}
else if (h < 0xF5) {
h *= mix;
h += x[1];
h *= mix;
h += x[2];
h *= mix;
h += x[3];
}
else {
return h + 256;
}
return (unsigned char)h;
}
static inline long
rb_memsearch_qs_utf8(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *x = xs, *xe = xs + m;
const unsigned char *y = ys;
VALUE i, qstable[512];
/* Preprocessing */
for (i = 0; i < 512; ++i) {
qstable[i] = m + 1;
}
for (; x < xe; ++x) {
qstable[rb_memsearch_qs_utf8_hash(x)] = xe - x;
}
/* Searching */
for (; y + m <= ys + n; y += qstable[rb_memsearch_qs_utf8_hash(y+m)]) {
if (*xs == *y && memcmp(xs, y, m) == 0)
return y - ys;
}
return -1;
}
static inline long
rb_memsearch_wchar(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *x = xs, x0 = *xs, *y = ys;
enum {char_size = 2};
for (n -= m; n >= 0; n -= char_size, y += char_size) {
if (x0 == *y && memcmp(x+1, y+1, m-1) == 0)
return y - ys;
}
return -1;
}
static inline long
rb_memsearch_qchar(const unsigned char *xs, long m, const unsigned char *ys, long n)
{
const unsigned char *x = xs, x0 = *xs, *y = ys;
enum {char_size = 4};
for (n -= m; n >= 0; n -= char_size, y += char_size) {
if (x0 == *y && memcmp(x+1, y+1, m-1) == 0)
return y - ys;
}
return -1;
}
long
rb_memsearch(const void *x0, long m, const void *y0, long n, rb_encoding *enc)
{
const unsigned char *x = x0, *y = y0;
if (m > n) return -1;
else if (m == n) {
return memcmp(x0, y0, m) == 0 ? 0 : -1;
}
else if (m < 1) {
return 0;
}
else if (m == 1) {
const unsigned char *ys = memchr(y, *x, n);
if (ys)
return ys - y;
else
return -1;
}
else if (LIKELY(rb_enc_mbminlen(enc) == 1)) {
if (m <= SIZEOF_VALUE) {
return rb_memsearch_ss(x0, m, y0, n);
}
else if (enc == rb_utf8_encoding()){
return rb_memsearch_qs_utf8(x0, m, y0, n);
}
}
else if (LIKELY(rb_enc_mbminlen(enc) == 2)) {
return rb_memsearch_wchar(x0, m, y0, n);
}
else if (LIKELY(rb_enc_mbminlen(enc) == 4)) {
return rb_memsearch_qchar(x0, m, y0, n);
}
return rb_memsearch_qs(x0, m, y0, n);
}
#define REG_LITERAL FL_USER5
#define REG_ENCODING_NONE FL_USER6
#define KCODE_FIXED FL_USER4
#define ARG_REG_OPTION_MASK \
(ONIG_OPTION_IGNORECASE|ONIG_OPTION_MULTILINE|ONIG_OPTION_EXTEND)
#define ARG_ENCODING_FIXED 16
#define ARG_ENCODING_NONE 32
static int
char_to_option(int c)
{
int val;
switch (c) {
case 'i':
val = ONIG_OPTION_IGNORECASE;
break;
case 'x':
val = ONIG_OPTION_EXTEND;
break;
case 'm':
val = ONIG_OPTION_MULTILINE;
break;
default:
val = 0;
break;
}
return val;
}
enum { OPTBUF_SIZE = 4 };
static char *
option_to_str(char str[OPTBUF_SIZE], int options)
{
char *p = str;
if (options & ONIG_OPTION_MULTILINE) *p++ = 'm';
if (options & ONIG_OPTION_IGNORECASE) *p++ = 'i';
if (options & ONIG_OPTION_EXTEND) *p++ = 'x';
*p = 0;
return str;
}
extern int
rb_char_to_option_kcode(int c, int *option, int *kcode)
{
*option = 0;
switch (c) {
case 'n':
*kcode = rb_ascii8bit_encindex();
return (*option = ARG_ENCODING_NONE);
case 'e':
*kcode = ENCINDEX_EUC_JP;
break;
case 's':
*kcode = ENCINDEX_Windows_31J;
break;
case 'u':
*kcode = rb_utf8_encindex();
break;
default:
*kcode = -1;
return (*option = char_to_option(c));
}
*option = ARG_ENCODING_FIXED;
return 1;
}
static void
rb_reg_check(VALUE re)
{
if (!RREGEXP_PTR(re) || !RREGEXP_SRC(re) || !RREGEXP_SRC_PTR(re)) {
rb_raise(rb_eTypeError, "uninitialized Regexp");
}
}
static void
rb_reg_expr_str(VALUE str, const char *s, long len,
rb_encoding *enc, rb_encoding *resenc, int term)
{
const char *p, *pend;
int cr = ENC_CODERANGE_UNKNOWN;
int need_escape = 0;
int c, clen;
p = s; pend = p + len;
rb_str_coderange_scan_restartable(p, pend, enc, &cr);
if (rb_enc_asciicompat(enc) && ENC_CODERANGE_CLEAN_P(cr)) {
while (p < pend) {
c = rb_enc_ascget(p, pend, &clen, enc);
if (c == -1) {
if (enc == resenc) {
p += mbclen(p, pend, enc);
}
else {
need_escape = 1;
break;
}
}
else if (c != term && rb_enc_isprint(c, enc)) {
p += clen;
}
else {
need_escape = 1;
break;
}
}
}
else {
need_escape = 1;
}
if (!need_escape) {
rb_str_buf_cat(str, s, len);
}
else {
int unicode_p = rb_enc_unicode_p(enc);
p = s;
while (p<pend) {
c = rb_enc_ascget(p, pend, &clen, enc);
if (c == '\\' && p+clen < pend) {
int n = clen + mbclen(p+clen, pend, enc);
rb_str_buf_cat(str, p, n);
p += n;
continue;
}
else if (c == -1) {
clen = rb_enc_precise_mbclen(p, pend, enc);
if (!MBCLEN_CHARFOUND_P(clen)) {
c = (unsigned char)*p;
clen = 1;
goto hex;
}
if (resenc) {
unsigned int c = rb_enc_mbc_to_codepoint(p, pend, enc);
rb_str_buf_cat_escaped_char(str, c, unicode_p);
}
else {
clen = MBCLEN_CHARFOUND_LEN(clen);
rb_str_buf_cat(str, p, clen);
}
}
else if (c == term) {
char c = '\\';
rb_str_buf_cat(str, &c, 1);
rb_str_buf_cat(str, p, clen);
}
else if (rb_enc_isprint(c, enc)) {
rb_str_buf_cat(str, p, clen);
}
else if (!rb_enc_isspace(c, enc)) {
char b[8];
hex:
snprintf(b, sizeof(b), "\\x%02X", c);
rb_str_buf_cat(str, b, 4);
}
else {
rb_str_buf_cat(str, p, clen);
}
p += clen;
}
}
}
static VALUE
rb_reg_desc(const char *s, long len, VALUE re)
{
rb_encoding *enc = rb_enc_get(re);
VALUE str = rb_str_buf_new2("/");
rb_encoding *resenc = rb_default_internal_encoding();
if (resenc == NULL) resenc = rb_default_external_encoding();
if (re && rb_enc_asciicompat(enc)) {
rb_enc_copy(str, re);
}
else {
rb_enc_associate(str, rb_usascii_encoding());
}
rb_reg_expr_str(str, s, len, enc, resenc, '/');
rb_str_buf_cat2(str, "/");
if (re) {
char opts[OPTBUF_SIZE];
rb_reg_check(re);
if (*option_to_str(opts, RREGEXP_PTR(re)->options))
rb_str_buf_cat2(str, opts);
if (RBASIC(re)->flags & REG_ENCODING_NONE)
rb_str_buf_cat2(str, "n");
}
return str;
}
/*
* call-seq:
* rxp.source -> str
*
* Returns the original string of the pattern.
*
* /ab+c/ix.source #=> "ab+c"
*
* Note that escape sequences are retained as is.
*
* /\x20\+/.source #=> "\\x20\\+"
*
*/
static VALUE
rb_reg_source(VALUE re)
{
VALUE str;
rb_reg_check(re);
str = rb_str_dup(RREGEXP_SRC(re));
return str;
}
/*
* call-seq:
* rxp.inspect -> string
*
* Produce a nicely formatted string-version of _rxp_. Perhaps surprisingly,
* <code>#inspect</code> actually produces the more natural version of
* the string than <code>#to_s</code>.
*
* /ab+c/ix.inspect #=> "/ab+c/ix"
*
*/
static VALUE
rb_reg_inspect(VALUE re)
{
if (!RREGEXP_PTR(re) || !RREGEXP_SRC(re) || !RREGEXP_SRC_PTR(re)) {
return rb_any_to_s(re);
}
return rb_reg_desc(RREGEXP_SRC_PTR(re), RREGEXP_SRC_LEN(re), re);
}
static VALUE rb_reg_str_with_term(VALUE re, int term);
/*
* call-seq:
* rxp.to_s -> str
*
* Returns a string containing the regular expression and its options (using the
* <code>(?opts:source)</code> notation. This string can be fed back in to
* Regexp::new to a regular expression with the same semantics as the
* original. (However, <code>Regexp#==</code> may not return true
* when comparing the two, as the source of the regular expression
* itself may differ, as the example shows). Regexp#inspect produces
* a generally more readable version of <i>rxp</i>.
*
* r1 = /ab+c/ix #=> /ab+c/ix
* s1 = r1.to_s #=> "(?ix-m:ab+c)"
* r2 = Regexp.new(s1) #=> /(?ix-m:ab+c)/
* r1 == r2 #=> false
* r1.source #=> "ab+c"
* r2.source #=> "(?ix-m:ab+c)"
*/
static VALUE
rb_reg_to_s(VALUE re)
{
return rb_reg_str_with_term(re, '/');
}
static VALUE
rb_reg_str_with_term(VALUE re, int term)
{
int options, opt;
const int embeddable = ONIG_OPTION_MULTILINE|ONIG_OPTION_IGNORECASE|ONIG_OPTION_EXTEND;
long len;
const UChar* ptr;
VALUE str = rb_str_buf_new2("(?");
char optbuf[OPTBUF_SIZE + 1]; /* for '-' */
rb_encoding *enc = rb_enc_get(re);
rb_reg_check(re);
rb_enc_copy(str, re);
options = RREGEXP_PTR(re)->options;
ptr = (UChar*)RREGEXP_SRC_PTR(re);
len = RREGEXP_SRC_LEN(re);
again:
if (len >= 4 && ptr[0] == '(' && ptr[1] == '?') {
int err = 1;
ptr += 2;
if ((len -= 2) > 0) {
do {
opt = char_to_option((int )*ptr);
if (opt != 0) {
options |= opt;
}
else {
break;
}
++ptr;
} while (--len > 0);
}
if (len > 1 && *ptr == '-') {
++ptr;
--len;
do {
opt = char_to_option((int )*ptr);
if (opt != 0) {
options &= ~opt;
}
else {
break;
}
++ptr;
} while (--len > 0);
}
if (*ptr == ')') {
--len;
++ptr;
goto again;
}
if (*ptr == ':' && ptr[len-1] == ')') {
Regexp *rp;
VALUE verbose = ruby_verbose;
ruby_verbose = Qfalse;
++ptr;
len -= 2;
err = onig_new(&rp, ptr, ptr + len, options,
enc, OnigDefaultSyntax, NULL);
onig_free(rp);
ruby_verbose = verbose;
}
if (err) {
options = RREGEXP_PTR(re)->options;
ptr = (UChar*)RREGEXP_SRC_PTR(re);
len = RREGEXP_SRC_LEN(re);
}
}
if (*option_to_str(optbuf, options)) rb_str_buf_cat2(str, optbuf);
if ((options & embeddable) != embeddable) {
optbuf[0] = '-';
option_to_str(optbuf + 1, ~options);
rb_str_buf_cat2(str, optbuf);
}
rb_str_buf_cat2(str, ":");
if (rb_enc_asciicompat(enc)) {
rb_reg_expr_str(str, (char*)ptr, len, enc, NULL, term);
rb_str_buf_cat2(str, ")");
}
else {
const char *s, *e;
char *paren;
ptrdiff_t n;
rb_str_buf_cat2(str, ")");
rb_enc_associate(str, rb_usascii_encoding());
str = rb_str_encode(str, rb_enc_from_encoding(enc), 0, Qnil);
/* backup encoded ")" to paren */
s = RSTRING_PTR(str);
e = RSTRING_END(str);
s = rb_enc_left_char_head(s, e-1, e, enc);
n = e - s;
paren = ALLOCA_N(char, n);
memcpy(paren, s, n);
rb_str_resize(str, RSTRING_LEN(str) - n);
rb_reg_expr_str(str, (char*)ptr, len, enc, NULL, term);
rb_str_buf_cat(str, paren, n);
}
rb_enc_copy(str, re);
return str;
}
NORETURN(static void rb_reg_raise(const char *s, long len, const char *err, VALUE re));
static void
rb_reg_raise(const char *s, long len, const char *err, VALUE re)
{
VALUE desc = rb_reg_desc(s, len, re);
rb_raise(rb_eRegexpError, "%s: %"PRIsVALUE, err, desc);
}
static VALUE
rb_enc_reg_error_desc(const char *s, long len, rb_encoding *enc, int options, const char *err)
{
char opts[OPTBUF_SIZE + 1]; /* for '/' */
VALUE desc = rb_str_buf_new2(err);
rb_encoding *resenc = rb_default_internal_encoding();
if (resenc == NULL) resenc = rb_default_external_encoding();
rb_enc_associate(desc, enc);
rb_str_buf_cat2(desc, ": /");
rb_reg_expr_str(desc, s, len, enc, resenc, '/');
opts[0] = '/';
option_to_str(opts + 1, options);
rb_str_buf_cat2(desc, opts);
return rb_exc_new3(rb_eRegexpError, desc);
}
NORETURN(static void rb_enc_reg_raise(const char *s, long len, rb_encoding *enc, int options, const char *err));
static void
rb_enc_reg_raise(const char *s, long len, rb_encoding *enc, int options, const char *err)
{
rb_exc_raise(rb_enc_reg_error_desc(s, len, enc, options, err));
}
static VALUE
rb_reg_error_desc(VALUE str, int options, const char *err)
{
return rb_enc_reg_error_desc(RSTRING_PTR(str), RSTRING_LEN(str),
rb_enc_get(str), options, err);
}
NORETURN(static void rb_reg_raise_str(VALUE str, int options, const char *err));
static void
rb_reg_raise_str(VALUE str, int options, const char *err)
{
rb_exc_raise(rb_reg_error_desc(str, options, err));
}
/*
* call-seq:
* rxp.casefold? -> true or false
*
* Returns the value of the case-insensitive flag.
*
* /a/.casefold? #=> false
* /a/i.casefold? #=> true
* /(?i:a)/.casefold? #=> false
*/
static VALUE
rb_reg_casefold_p(VALUE re)
{
rb_reg_check(re);
if (RREGEXP_PTR(re)->options & ONIG_OPTION_IGNORECASE) return Qtrue;
return Qfalse;
}
/*
* call-seq:
* rxp.options -> integer
*
* Returns the set of bits corresponding to the options used when
* creating this Regexp (see Regexp::new for details. Note that
* additional bits may be set in the returned options: these are used
* internally by the regular expression code. These extra bits are
* ignored if the options are passed to Regexp::new.
*
* Regexp::IGNORECASE #=> 1
* Regexp::EXTENDED #=> 2
* Regexp::MULTILINE #=> 4
*
* /cat/.options #=> 0
* /cat/ix.options #=> 3
* Regexp.new('cat', true).options #=> 1
* /\xa1\xa2/e.options #=> 16
*
* r = /cat/ix
* Regexp.new(r.source, r.options) #=> /cat/ix
*/
static VALUE
rb_reg_options_m(VALUE re)
{
int options = rb_reg_options(re);
return INT2NUM(options);
}
static int
reg_names_iter(const OnigUChar *name, const OnigUChar *name_end,
int back_num, int *back_refs, OnigRegex regex, void *arg)
{
VALUE ary = (VALUE)arg;
rb_ary_push(ary, rb_enc_str_new((const char *)name, name_end-name, regex->enc));
return 0;
}
/*
* call-seq:
* rxp.names -> [name1, name2, ...]
*
* Returns a list of names of captures as an array of strings.
*
* /(?<foo>.)(?<bar>.)(?<baz>.)/.names
* #=> ["foo", "bar", "baz"]
*
* /(?<foo>.)(?<foo>.)/.names
* #=> ["foo"]
*
* /(.)(.)/.names
* #=> []
*/
static VALUE
rb_reg_names(VALUE re)
{
VALUE ary;
rb_reg_check(re);
ary = rb_ary_new_capa(onig_number_of_names(RREGEXP_PTR(re)));
onig_foreach_name(RREGEXP_PTR(re), reg_names_iter, (void*)ary);
return ary;
}
static int
reg_named_captures_iter(const OnigUChar *name, const OnigUChar *name_end,
int back_num, int *back_refs, OnigRegex regex, void *arg)
{
VALUE hash = (VALUE)arg;
VALUE ary = rb_ary_new2(back_num);
int i;
for (i = 0; i < back_num; i++)
rb_ary_store(ary, i, INT2NUM(back_refs[i]));
rb_hash_aset(hash, rb_str_new((const char*)name, name_end-name),ary);
return 0;
}
/*
* call-seq:
* rxp.named_captures -> hash
*
* Returns a hash representing information about named captures of <i>rxp</i>.
*
* A key of the hash is a name of the named captures.
* A value of the hash is an array which is list of indexes of corresponding
* named captures.
*
* /(?<foo>.)(?<bar>.)/.named_captures
* #=> {"foo"=>[1], "bar"=>[2]}
*
* /(?<foo>.)(?<foo>.)/.named_captures
* #=> {"foo"=>[1, 2]}
*
* If there are no named captures, an empty hash is returned.
*
* /(.)(.)/.named_captures
* #=> {}
*/
static VALUE
rb_reg_named_captures(VALUE re)
{
regex_t *reg = (rb_reg_check(re), RREGEXP_PTR(re));
VALUE hash = rb_hash_new_with_size(onig_number_of_names(reg));
onig_foreach_name(reg, reg_named_captures_iter, (void*)hash);
return hash;
}
static int
onig_new_with_source(regex_t** reg, const UChar* pattern, const UChar* pattern_end,
OnigOptionType option, OnigEncoding enc, const OnigSyntaxType* syntax,
OnigErrorInfo* einfo, const char *sourcefile, int sourceline)
{
int r;
*reg = (regex_t* )malloc(sizeof(regex_t));
if (IS_NULL(*reg)) return ONIGERR_MEMORY;
r = onig_reg_init(*reg, option, ONIGENC_CASE_FOLD_DEFAULT, enc, syntax);
if (r) goto err;
r = onig_compile_ruby(*reg, pattern, pattern_end, einfo, sourcefile, sourceline);
if (r) {
err:
onig_free(*reg);
*reg = NULL;
}
return r;
}
static Regexp*
make_regexp(const char *s, long len, rb_encoding *enc, int flags, onig_errmsg_buffer err,
const char *sourcefile, int sourceline)
{
Regexp *rp;
int r;
OnigErrorInfo einfo;
/* Handle escaped characters first. */
/* Build a copy of the string (in dest) with the
escaped characters translated, and generate the regex
from that.
*/
r = onig_new_with_source(&rp, (UChar*)s, (UChar*)(s + len), flags,
enc, OnigDefaultSyntax, &einfo, sourcefile, sourceline);
if (r) {
onig_error_code_to_str((UChar*)err, r, &einfo);
return 0;
}
return rp;
}
/*
* Document-class: MatchData
*
* MatchData encapsulates the result of matching a Regexp against
* string. It is returned by Regexp#match and String#match, and also
* stored in a global variable returned by Regexp.last_match.
*
* Usage:
*
* url = 'https://docs.ruby-lang.org/en/2.5.0/MatchData.html'
* m = url.match(/(\d\.?)+/) # => #<MatchData "2.5.0" 1:"0">
* m.string # => "https://docs.ruby-lang.org/en/2.5.0/MatchData.html"
* m.regexp # => /(\d\.?)+/
* # entire matched substring:
* m[0] # => "2.5.0"
*
* # Working with unnamed captures
* m = url.match(%r{([^/]+)/([^/]+)\.html$})
* m.captures # => ["2.5.0", "MatchData"]
* m[1] # => "2.5.0"
* m.values_at(1, 2) # => ["2.5.0", "MatchData"]
*
* # Working with named captures
* m = url.match(%r{(?<version>[^/]+)/(?<module>[^/]+)\.html$})
* m.captures # => ["2.5.0", "MatchData"]
* m.named_captures # => {"version"=>"2.5.0", "module"=>"MatchData"}
* m[:version] # => "2.5.0"
* m.values_at(:version, :module)
* # => ["2.5.0", "MatchData"]
* # Numerical indexes are working, too
* m[1] # => "2.5.0"
* m.values_at(1, 2) # => ["2.5.0", "MatchData"]
*
* == Global variables equivalence
*
* Parts of last MatchData (returned by Regexp.last_match) are also
* aliased as global variables:
*
* * <code>$~</code> is Regexp.last_match;
* * <code>$&</code> is Regexp.last_match<code>[ 0 ]</code>;
* * <code>$1</code>, <code>$2</code>, and so on are
* Regexp.last_match<code>[ i ]</code> (captures by number);
* * <code>$`</code> is Regexp.last_match<code>.pre_match</code>;
* * <code>$'</code> is Regexp.last_match<code>.post_match</code>;
* * <code>$+</code> is Regexp.last_match<code>[ -1 ]</code> (the last capture).
*
* See also "Special global variables" section in Regexp documentation.
*/
VALUE rb_cMatch;
static VALUE
match_alloc(VALUE klass)
{
NEWOBJ_OF(match, struct RMatch, klass, T_MATCH);
match->str = 0;
match->rmatch = 0;
match->regexp = 0;
match->rmatch = ZALLOC(struct rmatch);
return (VALUE)match;
}
int
rb_reg_region_copy(struct re_registers *to, const struct re_registers *from)
{
onig_region_copy(to, (OnigRegion *)from);
if (to->allocated) return 0;
rb_gc();
onig_region_copy(to, (OnigRegion *)from);
if (to->allocated) return 0;
return ONIGERR_MEMORY;
}
typedef struct {
long byte_pos;
long char_pos;
} pair_t;
static int
pair_byte_cmp(const void *pair1, const void *pair2)
{
long diff = ((pair_t*)pair1)->byte_pos - ((pair_t*)pair2)->byte_pos;
#if SIZEOF_LONG > SIZEOF_INT
return diff ? diff > 0 ? 1 : -1 : 0;
#else
return (int)diff;
#endif
}
static void
update_char_offset(VALUE match)
{
struct rmatch *rm = RMATCH(match)->rmatch;
struct re_registers *regs;
int i, num_regs, num_pos;
long c;
char *s, *p, *q;
rb_encoding *enc;
pair_t *pairs;
if (rm->char_offset_num_allocated)
return;
regs = &rm->regs;
num_regs = rm->regs.num_regs;
if (rm->char_offset_num_allocated < num_regs) {
REALLOC_N(rm->char_offset, struct rmatch_offset, num_regs);
rm->char_offset_num_allocated = num_regs;
}
enc = rb_enc_get(RMATCH(match)->str);
if (rb_enc_mbmaxlen(enc) == 1) {
for (i = 0; i < num_regs; i++) {
rm->char_offset[i].beg = BEG(i);
rm->char_offset[i].end = END(i);
}
return;
}
pairs = ALLOCA_N(pair_t, num_regs*2);
num_pos = 0;
for (i = 0; i < num_regs; i++) {
if (BEG(i) < 0)
continue;
pairs[num_pos++].byte_pos = BEG(i);
pairs[num_pos++].byte_pos = END(i);
}
qsort(pairs, num_pos, sizeof(pair_t), pair_byte_cmp);
s = p = RSTRING_PTR(RMATCH(match)->str);
c = 0;
for (i = 0; i < num_pos; i++) {
q = s + pairs[i].byte_pos;
c += rb_enc_strlen(p, q, enc);
pairs[i].char_pos = c;
p = q;
}
for (i = 0; i < num_regs; i++) {
pair_t key, *found;
if (BEG(i) < 0) {
rm->char_offset[i].beg = -1;
rm->char_offset[i].end = -1;
continue;
}
key.byte_pos = BEG(i);
found = bsearch(&key, pairs, num_pos, sizeof(pair_t), pair_byte_cmp);
rm->char_offset[i].beg = found->char_pos;
key.byte_pos = END(i);
found = bsearch(&key, pairs, num_pos, sizeof(pair_t), pair_byte_cmp);
rm->char_offset[i].end = found->char_pos;
}
}
static void
match_check(VALUE match)
{
if (!RMATCH(match)->regexp) {
rb_raise(rb_eTypeError, "uninitialized MatchData");
}
}
/* :nodoc: */
static VALUE
match_init_copy(VALUE obj, VALUE orig)
{
struct rmatch *rm;
if (!OBJ_INIT_COPY(obj, orig)) return obj;
RMATCH(obj)->str = RMATCH(orig)->str;
RMATCH(obj)->regexp = RMATCH(orig)->regexp;
rm = RMATCH(obj)->rmatch;
if (rb_reg_region_copy(&rm->regs, RMATCH_REGS(orig)))
rb_memerror();
if (RMATCH(orig)->rmatch->char_offset_num_allocated) {
if (rm->char_offset_num_allocated < rm->regs.num_regs) {
REALLOC_N(rm->char_offset, struct rmatch_offset, rm->regs.num_regs);
rm->char_offset_num_allocated = rm->regs.num_regs;
}
MEMCPY(rm->char_offset, RMATCH(orig)->rmatch->char_offset,
struct rmatch_offset, rm->regs.num_regs);
RB_GC_GUARD(orig);
}
return obj;
}
/*
* call-seq:
* mtch.regexp -> regexp
*
* Returns the regexp.
*
* m = /a.*b/.match("abc")
* m.regexp #=> /a.*b/
*/
static VALUE
match_regexp(VALUE match)
{
VALUE regexp;
match_check(match);
regexp = RMATCH(match)->regexp;
if (NIL_P(regexp)) {
VALUE str = rb_reg_nth_match(0, match);
regexp = rb_reg_regcomp(rb_reg_quote(str));
RMATCH(match)->regexp = regexp;
}
return regexp;
}
/*
* call-seq:
* mtch.names -> [name1, name2, ...]
*
* Returns a list of names of captures as an array of strings.
* This is the same as mtch.regexp.names.
*
* /(?<foo>.)(?<bar>.)(?<baz>.)/.match("hoge").names
* #=> ["foo", "bar", "baz"]
*
* m = /(?<x>.)(?<y>.)?/.match("a") #=> #<MatchData "a" x:"a" y:nil>
* m.names #=> ["x", "y"]
*/
static VALUE
match_names(VALUE match)
{
match_check(match);
if (NIL_P(RMATCH(match)->regexp))
return rb_ary_new_capa(0);
return rb_reg_names(RMATCH(match)->regexp);
}
/*
* call-seq:
* mtch.length -> integer
* mtch.size -> integer
*
* Returns the number of elements in the match array.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.length #=> 5
* m.size #=> 5
*/
static VALUE
match_size(VALUE match)
{
match_check(match);
return INT2FIX(RMATCH_REGS(match)->num_regs);
}
static int name_to_backref_number(struct re_registers *, VALUE, const char*, const char*);
static int
match_backref_number(VALUE match, VALUE backref)
{
const char *name;
int num;
struct re_registers *regs = RMATCH_REGS(match);
VALUE regexp = RMATCH(match)->regexp;
match_check(match);
if (SYMBOL_P(backref)) {
backref = rb_sym2str(backref);
}
else if (!RB_TYPE_P(backref, T_STRING)) {
return NUM2INT(backref);
}
name = StringValueCStr(backref);
num = name_to_backref_number(regs, regexp, name, name + strlen(name));
if (num < 1) {
rb_raise(rb_eIndexError, "undefined group name reference: %s", name);
}
return num;
}
int
rb_reg_backref_number(VALUE match, VALUE backref)
{
return match_backref_number(match, backref);
}
/*
* call-seq:
* mtch.offset(n) -> array
*
* Returns a two-element array containing the beginning and ending offsets of
* the <em>n</em>th match.
* <em>n</em> can be a string or symbol to reference a named capture.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.offset(0) #=> [1, 7]
* m.offset(4) #=> [6, 7]
*
* m = /(?<foo>.)(.)(?<bar>.)/.match("hoge")
* p m.offset(:foo) #=> [0, 1]
* p m.offset(:bar) #=> [2, 3]
*
*/
static VALUE
match_offset(VALUE match, VALUE n)
{
int i = match_backref_number(match, n);
struct re_registers *regs = RMATCH_REGS(match);
match_check(match);
if (i < 0 || regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (BEG(i) < 0)
return rb_assoc_new(Qnil, Qnil);
update_char_offset(match);
return rb_assoc_new(INT2FIX(RMATCH(match)->rmatch->char_offset[i].beg),
INT2FIX(RMATCH(match)->rmatch->char_offset[i].end));
}
/*
* call-seq:
* mtch.begin(n) -> integer
*
* Returns the offset of the start of the <em>n</em>th element of the match
* array in the string.
* <em>n</em> can be a string or symbol to reference a named capture.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.begin(0) #=> 1
* m.begin(2) #=> 2
*
* m = /(?<foo>.)(.)(?<bar>.)/.match("hoge")
* p m.begin(:foo) #=> 0
* p m.begin(:bar) #=> 2
*/
static VALUE
match_begin(VALUE match, VALUE n)
{
int i = match_backref_number(match, n);
struct re_registers *regs = RMATCH_REGS(match);
match_check(match);
if (i < 0 || regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (BEG(i) < 0)
return Qnil;
update_char_offset(match);
return INT2FIX(RMATCH(match)->rmatch->char_offset[i].beg);
}
/*
* call-seq:
* mtch.end(n) -> integer
*
* Returns the offset of the character immediately following the end of the
* <em>n</em>th element of the match array in the string.
* <em>n</em> can be a string or symbol to reference a named capture.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.end(0) #=> 7
* m.end(2) #=> 3
*
* m = /(?<foo>.)(.)(?<bar>.)/.match("hoge")
* p m.end(:foo) #=> 1
* p m.end(:bar) #=> 3
*/
static VALUE
match_end(VALUE match, VALUE n)
{
int i = match_backref_number(match, n);
struct re_registers *regs = RMATCH_REGS(match);
match_check(match);
if (i < 0 || regs->num_regs <= i)
rb_raise(rb_eIndexError, "index %d out of matches", i);
if (BEG(i) < 0)
return Qnil;
update_char_offset(match);
return INT2FIX(RMATCH(match)->rmatch->char_offset[i].end);
}
#define MATCH_BUSY FL_USER2
void
rb_match_busy(VALUE match)
{
FL_SET(match, MATCH_BUSY);
}
void
rb_match_unbusy(VALUE match)
{
FL_UNSET(match, MATCH_BUSY);
}
int
rb_match_count(VALUE match)
{
struct re_registers *regs;
if (NIL_P(match)) return -1;
regs = RMATCH_REGS(match);
if (!regs) return -1;
return regs->num_regs;
}
int
rb_match_nth_defined(int nth, VALUE match)
{
struct re_registers *regs;
if (NIL_P(match)) return FALSE;
regs = RMATCH_REGS(match);
if (!regs) return FALSE;
if (nth >= regs->num_regs) {
return FALSE;
}
if (nth < 0) {
nth += regs->num_regs;
if (nth <= 0) return FALSE;
}
return (BEG(nth) != -1);
}
static void
match_set_string(VALUE m, VALUE string, long pos, long len)
{
struct RMatch *match = (struct RMatch *)m;
struct rmatch *rmatch = match->rmatch;
match->str = string;
match->regexp = Qnil;
int err = onig_region_resize(&rmatch->regs, 1);
if (err) rb_memerror();
rmatch->regs.beg[0] = pos;
rmatch->regs.end[0] = pos + len;
}
void
rb_backref_set_string(VALUE string, long pos, long len)
{
VALUE match = rb_backref_get();
if (NIL_P(match) || FL_TEST(match, MATCH_BUSY)) {
match = match_alloc(rb_cMatch);
}
match_set_string(match, string, pos, len);
rb_backref_set(match);
}
/*
* call-seq:
* rxp.fixed_encoding? -> true or false
*
* Returns false if rxp is applicable to
* a string with any ASCII compatible encoding.
* Returns true otherwise.
*
* r = /a/
* r.fixed_encoding? #=> false
* r =~ "\u{6666} a" #=> 2
* r =~ "\xa1\xa2 a".force_encoding("euc-jp") #=> 2
* r =~ "abc".force_encoding("euc-jp") #=> 0
*
* r = /a/u
* r.fixed_encoding? #=> true
* r.encoding #=> #<Encoding:UTF-8>
* r =~ "\u{6666} a" #=> 2
* r =~ "\xa1\xa2".force_encoding("euc-jp") #=> Encoding::CompatibilityError
* r =~ "abc".force_encoding("euc-jp") #=> 0
*
* r = /\u{6666}/
* r.fixed_encoding? #=> true
* r.encoding #=> #<Encoding:UTF-8>
* r =~ "\u{6666} a" #=> 0
* r =~ "\xa1\xa2".force_encoding("euc-jp") #=> Encoding::CompatibilityError
* r =~ "abc".force_encoding("euc-jp") #=> nil
*/
static VALUE
rb_reg_fixed_encoding_p(VALUE re)
{
if (FL_TEST(re, KCODE_FIXED))
return Qtrue;
else
return Qfalse;
}
static VALUE
rb_reg_preprocess(const char *p, const char *end, rb_encoding *enc,
rb_encoding **fixed_enc, onig_errmsg_buffer err);
NORETURN(static void reg_enc_error(VALUE re, VALUE str));
static void
reg_enc_error(VALUE re, VALUE str)
{
rb_raise(rb_eEncCompatError,
"incompatible encoding regexp match (%s regexp with %s string)",
rb_enc_name(rb_enc_get(re)),
rb_enc_name(rb_enc_get(str)));
}
static inline int
str_coderange(VALUE str)
{
int cr = ENC_CODERANGE(str);
if (cr == ENC_CODERANGE_UNKNOWN) {
cr = rb_enc_str_coderange(str);
}
return cr;
}
static rb_encoding*
rb_reg_prepare_enc(VALUE re, VALUE str, int warn)
{
rb_encoding *enc = 0;
int cr = str_coderange(str);
if (cr == ENC_CODERANGE_BROKEN) {
rb_raise(rb_eArgError,
"invalid byte sequence in %s",
rb_enc_name(rb_enc_get(str)));
}
rb_reg_check(re);
enc = rb_enc_get(str);
if (RREGEXP_PTR(re)->enc == enc) {
}
else if (cr == ENC_CODERANGE_7BIT &&
RREGEXP_PTR(re)->enc == rb_usascii_encoding()) {
enc = RREGEXP_PTR(re)->enc;
}
else if (!rb_enc_asciicompat(enc)) {
reg_enc_error(re, str);
}
else if (rb_reg_fixed_encoding_p(re)) {
if ((!rb_enc_asciicompat(RREGEXP_PTR(re)->enc) ||
cr != ENC_CODERANGE_7BIT)) {
reg_enc_error(re, str);
}
enc = RREGEXP_PTR(re)->enc;
}
else if (warn && (RBASIC(re)->flags & REG_ENCODING_NONE) &&
enc != rb_ascii8bit_encoding() &&
cr != ENC_CODERANGE_7BIT) {
rb_warn("historical binary regexp match /.../n against %s string",
rb_enc_name(enc));
}
return enc;
}
regex_t *
rb_reg_prepare_re0(VALUE re, VALUE str, onig_errmsg_buffer err)
{
regex_t *reg = RREGEXP_PTR(re);
int r;
OnigErrorInfo einfo;
const char *pattern;
VALUE unescaped;
rb_encoding *fixed_enc = 0;
rb_encoding *enc = rb_reg_prepare_enc(re, str, 1);
if (reg->enc == enc) return reg;
rb_reg_check(re);
reg = RREGEXP_PTR(re);
pattern = RREGEXP_SRC_PTR(re);
unescaped = rb_reg_preprocess(
pattern, pattern + RREGEXP_SRC_LEN(re), enc,
&fixed_enc, err);
if (unescaped == Qnil) {
rb_raise(rb_eArgError, "regexp preprocess failed: %s", err);
}
const char *ptr;
long len;
RSTRING_GETMEM(unescaped, ptr, len);
r = onig_new(&reg, (UChar *)ptr, (UChar *)(ptr + len),
reg->options, enc,
OnigDefaultSyntax, &einfo);
if (r) {
onig_error_code_to_str((UChar*)err, r, &einfo);
rb_reg_raise(pattern, RREGEXP_SRC_LEN(re), err, re);
}
RB_GC_GUARD(unescaped);
return reg;
}
regex_t *
rb_reg_prepare_re(VALUE re, VALUE str)
{
onig_errmsg_buffer err = "";
return rb_reg_prepare_re0(re, str, err);
}
long
rb_reg_adjust_startpos(VALUE re, VALUE str, long pos, int reverse)
{
long range;
rb_encoding *enc;
UChar *p, *string;
enc = rb_reg_prepare_enc(re, str, 0);
if (reverse) {
range = -pos;
}
else {
range = RSTRING_LEN(str) - pos;
}
if (pos > 0 && ONIGENC_MBC_MAXLEN(enc) != 1 && pos < RSTRING_LEN(str)) {
string = (UChar*)RSTRING_PTR(str);
if (range > 0) {
p = onigenc_get_right_adjust_char_head(enc, string, string + pos, string + RSTRING_LEN(str));
}
else {
p = ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, string, string + pos, string + RSTRING_LEN(str));
}
return p - string;
}
return pos;
}
/* returns byte offset */
long
rb_reg_search0(VALUE re, VALUE str, long pos, int reverse, int set_backref_str)
{
long result;
VALUE match;
struct re_registers regi, *regs = &regi;
char *start, *range;
long len;
regex_t *reg;
int tmpreg;
onig_errmsg_buffer err = "";
RSTRING_GETMEM(str, start, len);
range = start;
if (pos > len || pos < 0) {
rb_backref_set(Qnil);
return -1;
}
reg = rb_reg_prepare_re0(re, str, err);
tmpreg = reg != RREGEXP_PTR(re);
if (!tmpreg) RREGEXP(re)->usecnt++;
match = rb_backref_get();
if (!NIL_P(match)) {
if (FL_TEST(match, MATCH_BUSY)) {
match = Qnil;
}
else {
regs = RMATCH_REGS(match);
}
}
if (NIL_P(match)) {
MEMZERO(regs, struct re_registers, 1);
}
if (!reverse) {
range += len;
}
result = onig_search(reg,
(UChar*)start,
((UChar*)(start + len)),
((UChar*)(start + pos)),
((UChar*)range),
regs, ONIG_OPTION_NONE);
if (!tmpreg) RREGEXP(re)->usecnt--;
if (tmpreg) {
if (RREGEXP(re)->usecnt) {
onig_free(reg);
}
else {
onig_free(RREGEXP_PTR(re));
RREGEXP_PTR(re) = reg;
}
}
if (result < 0) {
if (regs == &regi)
onig_region_free(regs, 0);
if (result == ONIG_MISMATCH) {
rb_backref_set(Qnil);
return result;
}
else {
onig_error_code_to_str((UChar*)err, (int)result);
rb_reg_raise(RREGEXP_SRC_PTR(re), RREGEXP_SRC_LEN(re), err, re);
}
}
if (NIL_P(match)) {
int err;
match = match_alloc(rb_cMatch);
err = rb_reg_region_copy(RMATCH_REGS(match), regs);
onig_region_free(regs, 0);
if (err) rb_memerror();
}
if (set_backref_str) {
RMATCH(match)->str = rb_str_new4(str);
}
RMATCH(match)->regexp = re;
rb_backref_set(match);
return result;
}
long
rb_reg_search(VALUE re, VALUE str, long pos, int reverse)
{
return rb_reg_search0(re, str, pos, reverse, 1);
}
bool
rb_reg_start_with_p(VALUE re, VALUE str)
{
long result;
VALUE match;
struct re_registers regi, *regs = &regi;
regex_t *reg;
int tmpreg;
onig_errmsg_buffer err = "";
reg = rb_reg_prepare_re0(re, str, err);
tmpreg = reg != RREGEXP_PTR(re);
if (!tmpreg) RREGEXP(re)->usecnt++;
match = rb_backref_get();
if (!NIL_P(match)) {
if (FL_TEST(match, MATCH_BUSY)) {
match = Qnil;
}
else {
regs = RMATCH_REGS(match);
}
}
if (NIL_P(match)) {
MEMZERO(regs, struct re_registers, 1);
}
const char *ptr;
long len;
RSTRING_GETMEM(str, ptr, len);
result = onig_match(reg,
(UChar*)(ptr),
((UChar*)(ptr + len)),
(UChar*)(ptr),
regs, ONIG_OPTION_NONE);
if (!tmpreg) RREGEXP(re)->usecnt--;
if (tmpreg) {
if (RREGEXP(re)->usecnt) {
onig_free(reg);
}
else {
onig_free(RREGEXP_PTR(re));
RREGEXP_PTR(re) = reg;
}
}
if (result < 0) {
if (regs == &regi)
onig_region_free(regs, 0);
if (result == ONIG_MISMATCH) {
rb_backref_set(Qnil);
return false;
}
else {
onig_error_code_to_str((UChar*)err, (int)result);
rb_reg_raise(RREGEXP_SRC_PTR(re), RREGEXP_SRC_LEN(re), err, re);
}
}
if (NIL_P(match)) {
int err;
match = match_alloc(rb_cMatch);
err = rb_reg_region_copy(RMATCH_REGS(match), regs);
onig_region_free(regs, 0);
if (err) rb_memerror();
}
RMATCH(match)->str = rb_str_new4(str);
RMATCH(match)->regexp = re;
rb_backref_set(match);
return true;
}
VALUE
rb_reg_nth_defined(int nth, VALUE match)
{
struct re_registers *regs;
if (NIL_P(match)) return Qnil;
match_check(match);
regs = RMATCH_REGS(match);
if (nth >= regs->num_regs) {
return Qnil;
}
if (nth < 0) {
nth += regs->num_regs;
if (nth <= 0) return Qnil;
}
if (BEG(nth) == -1) return Qfalse;
return Qtrue;
}
VALUE
rb_reg_nth_match(int nth, VALUE match)
{
VALUE str;
long start, end, len;
struct re_registers *regs;
if (NIL_P(match)) return Qnil;
match_check(match);
regs = RMATCH_REGS(match);
if (nth >= regs->num_regs) {
return Qnil;
}
if (nth < 0) {
nth += regs->num_regs;
if (nth <= 0) return Qnil;
}
start = BEG(nth);
if (start == -1) return Qnil;
end = END(nth);
len = end - start;
str = rb_str_subseq(RMATCH(match)->str, start, len);
return str;
}
VALUE
rb_reg_last_match(VALUE match)
{
return rb_reg_nth_match(0, match);
}
/*
* call-seq:
* mtch.pre_match -> str
*
* Returns the portion of the original string before the current match.
* Equivalent to the special variable <code>$`</code>.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.pre_match #=> "T"
*/
VALUE
rb_reg_match_pre(VALUE match)
{
VALUE str;
struct re_registers *regs;
if (NIL_P(match)) return Qnil;
match_check(match);
regs = RMATCH_REGS(match);
if (BEG(0) == -1) return Qnil;
str = rb_str_subseq(RMATCH(match)->str, 0, BEG(0));
return str;
}
/*
* call-seq:
* mtch.post_match -> str
*
* Returns the portion of the original string after the current match.
* Equivalent to the special variable <code>$'</code>.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138: The Movie")
* m.post_match #=> ": The Movie"
*/
VALUE
rb_reg_match_post(VALUE match)
{
VALUE str;
long pos;
struct re_registers *regs;
if (NIL_P(match)) return Qnil;
match_check(match);
regs = RMATCH_REGS(match);
if (BEG(0) == -1) return Qnil;
str = RMATCH(match)->str;
pos = END(0);
str = rb_str_subseq(str, pos, RSTRING_LEN(str) - pos);
return str;
}
VALUE
rb_reg_match_last(VALUE match)
{
int i;
struct re_registers *regs;
if (NIL_P(match)) return Qnil;
match_check(match);
regs = RMATCH_REGS(match);
if (BEG(0) == -1) return Qnil;
for (i=regs->num_regs-1; BEG(i) == -1 && i > 0; i--)
;
if (i == 0) return Qnil;
return rb_reg_nth_match(i, match);
}
static VALUE
last_match_getter(ID _x, VALUE *_y)
{
return rb_reg_last_match(rb_backref_get());
}
static VALUE
prematch_getter(ID _x, VALUE *_y)
{
return rb_reg_match_pre(rb_backref_get());
}
static VALUE
postmatch_getter(ID _x, VALUE *_y)
{
return rb_reg_match_post(rb_backref_get());
}
static VALUE
last_paren_match_getter(ID _x, VALUE *_y)
{
return rb_reg_match_last(rb_backref_get());
}
static VALUE
match_array(VALUE match, int start)
{
struct re_registers *regs;
VALUE ary;
VALUE target;
int i;
match_check(match);
regs = RMATCH_REGS(match);
ary = rb_ary_new2(regs->num_regs);
target = RMATCH(match)->str;
for (i=start; i<regs->num_regs; i++) {
if (regs->beg[i] == -1) {
rb_ary_push(ary, Qnil);
}
else {
VALUE str = rb_str_subseq(target, regs->beg[i], regs->end[i]-regs->beg[i]);
rb_ary_push(ary, str);
}
}
return ary;
}
/*
* call-seq:
* mtch.to_a -> anArray
*
* Returns the array of matches.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.to_a #=> ["HX1138", "H", "X", "113", "8"]
*
* Because <code>to_a</code> is called when expanding
* <code>*</code><em>variable</em>, there's a useful assignment
* shortcut for extracting matched fields. This is slightly slower than
* accessing the fields directly (as an intermediate array is
* generated).
*
* all,f1,f2,f3 = * /(.)(.)(\d+)(\d)/.match("THX1138.")
* all #=> "HX1138"
* f1 #=> "H"
* f2 #=> "X"
* f3 #=> "113"
*/
static VALUE
match_to_a(VALUE match)
{
return match_array(match, 0);
}
/*
* call-seq:
* mtch.captures -> array
*
* Returns the array of captures; equivalent to <code>mtch.to_a[1..-1]</code>.
*
* f1,f2,f3,f4 = /(.)(.)(\d+)(\d)/.match("THX1138.").captures
* f1 #=> "H"
* f2 #=> "X"
* f3 #=> "113"
* f4 #=> "8"
*/
static VALUE
match_captures(VALUE match)
{
return match_array(match, 1);
}
static int
name_to_backref_number(struct re_registers *regs, VALUE regexp, const char* name, const char* name_end)
{
if (NIL_P(regexp)) return -1;
return onig_name_to_backref_number(RREGEXP_PTR(regexp),
(const unsigned char *)name, (const unsigned char *)name_end, regs);
}
NORETURN(static void name_to_backref_error(VALUE name));
static void
name_to_backref_error(VALUE name)
{
rb_raise(rb_eIndexError, "undefined group name reference: % "PRIsVALUE,
name);
}
#define NAME_TO_NUMBER(regs, re, name, name_ptr, name_end) \
(NIL_P(re) ? 0 : \
!rb_enc_compatible(RREGEXP_SRC(re), (name)) ? 0 : \
name_to_backref_number((regs), (re), (name_ptr), (name_end)))
static int
namev_to_backref_number(struct re_registers *regs, VALUE re, VALUE name)
{
int num;
if (SYMBOL_P(name)) {
name = rb_sym2str(name);
}
else if (!RB_TYPE_P(name, T_STRING)) {
return -1;
}
num = NAME_TO_NUMBER(regs, re, name,
RSTRING_PTR(name), RSTRING_END(name));
if (num < 1) {
name_to_backref_error(name);
}
return num;
}
static VALUE
match_ary_subseq(VALUE match, long beg, long len, VALUE result)
{
long olen = RMATCH_REGS(match)->num_regs;
long j, end = olen < beg+len ? olen : beg+len;
if (NIL_P(result)) result = rb_ary_new_capa(len);
if (len == 0) return result;
for (j = beg; j < end; j++) {
rb_ary_push(result, rb_reg_nth_match((int)j, match));
}
if (beg + len > j) {
rb_ary_resize(result, RARRAY_LEN(result) + (beg + len) - j);
}
return result;
}
static VALUE
match_ary_aref(VALUE match, VALUE idx, VALUE result)
{
long beg, len;
int num_regs = RMATCH_REGS(match)->num_regs;
/* check if idx is Range */
switch (rb_range_beg_len(idx, &beg, &len, (long)num_regs, !NIL_P(result))) {
case Qfalse:
if (NIL_P(result)) return rb_reg_nth_match(NUM2INT(idx), match);
rb_ary_push(result, rb_reg_nth_match(NUM2INT(idx), match));
return result;
case Qnil:
return Qnil;
default:
return match_ary_subseq(match, beg, len, result);
}
}
/*
* call-seq:
* mtch[i] -> str or nil
* mtch[start, length] -> array
* mtch[range] -> array
* mtch[name] -> str or nil
*
* Match Reference -- MatchData acts as an array, and may be accessed
* using the normal array indexing techniques. <code>mtch[0]</code>
* is equivalent to the special variable <code>$&</code>, and returns
* the entire matched string. <code>mtch[1]</code>,
* <code>mtch[2]</code>, and so on return the values of the matched
* backreferences (portions of the pattern between parentheses).
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m #=> #<MatchData "HX1138" 1:"H" 2:"X" 3:"113" 4:"8">
* m[0] #=> "HX1138"
* m[1, 2] #=> ["H", "X"]
* m[1..3] #=> ["H", "X", "113"]
* m[-3, 2] #=> ["X", "113"]
*
* m = /(?<foo>a+)b/.match("ccaaab")
* m #=> #<MatchData "aaab" foo:"aaa">
* m["foo"] #=> "aaa"
* m[:foo] #=> "aaa"
*/
static VALUE
match_aref(int argc, VALUE *argv, VALUE match)
{
VALUE idx, length;
match_check(match);
rb_scan_args(argc, argv, "11", &idx, &length);
if (NIL_P(length)) {
if (FIXNUM_P(idx)) {
return rb_reg_nth_match(FIX2INT(idx), match);
}
else {
int num = namev_to_backref_number(RMATCH_REGS(match), RMATCH(match)->regexp, idx);
if (num >= 0) {
return rb_reg_nth_match(num, match);
}
else {
return match_ary_aref(match, idx, Qnil);
}
}
}
else {
long beg = NUM2LONG(idx);
long len = NUM2LONG(length);
long num_regs = RMATCH_REGS(match)->num_regs;
if (len < 0) {
return Qnil;
}
if (beg < 0) {
beg += num_regs;
if (beg < 0) return Qnil;
}
else if (beg > num_regs) {
return Qnil;
}
else if (beg+len > num_regs) {
len = num_regs - beg;
}
return match_ary_subseq(match, beg, len, Qnil);
}
}
/*
* call-seq:
*
* mtch.values_at(index, ...) -> array
*
* Uses each <i>index</i> to access the matching values, returning an array of
* the corresponding matches.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138: The Movie")
* m.to_a #=> ["HX1138", "H", "X", "113", "8"]
* m.values_at(0, 2, -2) #=> ["HX1138", "X", "113"]
* m.values_at(1..2, -1) #=> ["H", "X", "8"]
*
* m = /(?<a>\d+) *(?<op>[+\-*\/]) *(?<b>\d+)/.match("1 + 2")
* m.to_a #=> ["1 + 2", "1", "+", "2"]
* m.values_at(:a, :b, :op) #=> ["1", "2", "+"]
*/
static VALUE
match_values_at(int argc, VALUE *argv, VALUE match)
{
VALUE result;
int i;
match_check(match);
result = rb_ary_new2(argc);
for (i=0; i<argc; i++) {
if (FIXNUM_P(argv[i])) {
rb_ary_push(result, rb_reg_nth_match(FIX2INT(argv[i]), match));
}
else {
int num = namev_to_backref_number(RMATCH_REGS(match), RMATCH(match)->regexp, argv[i]);
if (num >= 0) {
rb_ary_push(result, rb_reg_nth_match(num, match));
}
else {
match_ary_aref(match, argv[i], result);
}
}
}
return result;
}
/*
* call-seq:
* mtch.to_s -> str
*
* Returns the entire matched string.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.to_s #=> "HX1138"
*/
static VALUE
match_to_s(VALUE match)
{
VALUE str = rb_reg_last_match(match);
match_check(match);
if (NIL_P(str)) str = rb_str_new(0,0);
return str;
}
static int
match_named_captures_iter(const OnigUChar *name, const OnigUChar *name_end,
int back_num, int *back_refs, OnigRegex regex, void *arg) {
struct MEMO *memo = MEMO_CAST(arg);
VALUE hash = memo->v1;
VALUE match = memo->v2;
VALUE key = rb_enc_str_new((const char *)name, name_end-name, regex->enc);
VALUE value;
int i;
int found = 0;
for (i = 0; i < back_num; i++) {
value = rb_reg_nth_match(back_refs[i], match);
if (RTEST(value)) {
rb_hash_aset(hash, key, value);
found = 1;
}
}
if (found == 0) {
rb_hash_aset(hash, key, Qnil);
}
return 0;
}
/*
* call-seq:
* mtch.named_captures -> hash
*
* Returns a Hash using named capture.
*
* A key of the hash is a name of the named captures.
* A value of the hash is a string of last successful capture of corresponding
* group.
*
* m = /(?<a>.)(?<b>.)/.match("01")
* m.named_captures #=> {"a" => "0", "b" => "1"}
*
* m = /(?<a>.)(?<b>.)?/.match("0")
* m.named_captures #=> {"a" => "0", "b" => nil}
*
* m = /(?<a>.)(?<a>.)/.match("01")
* m.named_captures #=> {"a" => "1"}
*
* m = /(?<a>x)|(?<a>y)/.match("x")
* m.named_captures #=> {"a" => "x"}
*/
static VALUE
match_named_captures(VALUE match)
{
VALUE hash;
struct MEMO *memo;
match_check(match);
if (NIL_P(RMATCH(match)->regexp))
return rb_hash_new();
hash = rb_hash_new();
memo = MEMO_NEW(hash, match, 0);
onig_foreach_name(RREGEXP(RMATCH(match)->regexp)->ptr, match_named_captures_iter, (void*)memo);
return hash;
}
/*
* call-seq:
* mtch.string -> str
*
* Returns a frozen copy of the string passed in to <code>match</code>.
*
* m = /(.)(.)(\d+)(\d)/.match("THX1138.")
* m.string #=> "THX1138."
*/
static VALUE
match_string(VALUE match)
{
match_check(match);
return RMATCH(match)->str; /* str is frozen */
}
struct backref_name_tag {
const UChar *name;
long len;
};
static int
match_inspect_name_iter(const OnigUChar *name, const OnigUChar *name_end,
int back_num, int *back_refs, OnigRegex regex, void *arg0)
{
struct backref_name_tag *arg = (struct backref_name_tag *)arg0;
int i;
for (i = 0; i < back_num; i++) {
arg[back_refs[i]].name = name;
arg[back_refs[i]].len = name_end - name;
}
return 0;
}
/*
* call-seq:
* mtch.inspect -> str
*
* Returns a printable version of <i>mtch</i>.
*
* puts /.$/.match("foo").inspect
* #=> #<MatchData "o">
*
* puts /(.)(.)(.)/.match("foo").inspect
* #=> #<MatchData "foo" 1:"f" 2:"o" 3:"o">
*
* puts /(.)(.)?(.)/.match("fo").inspect
* #=> #<MatchData "fo" 1:"f" 2:nil 3:"o">
*
* puts /(?<foo>.)(?<bar>.)(?<baz>.)/.match("hoge").inspect
* #=> #<MatchData "hog" foo:"h" bar:"o" baz:"g">
*
*/
static VALUE
match_inspect(VALUE match)
{
VALUE cname = rb_class_path(rb_obj_class(match));
VALUE str;
int i;
struct re_registers *regs = RMATCH_REGS(match);
int num_regs = regs->num_regs;
struct backref_name_tag *names;
VALUE regexp = RMATCH(match)->regexp;
if (regexp == 0) {
return rb_sprintf("#<%"PRIsVALUE":%p>", cname, (void*)match);
}
else if (NIL_P(regexp)) {
return rb_sprintf("#<%"PRIsVALUE": %"PRIsVALUE">",
cname, rb_reg_nth_match(0, match));
}
names = ALLOCA_N(struct backref_name_tag, num_regs);
MEMZERO(names, struct backref_name_tag, num_regs);
onig_foreach_name(RREGEXP_PTR(regexp),
match_inspect_name_iter, names);
str = rb_str_buf_new2("#<");
rb_str_append(str, cname);
for (i = 0; i < num_regs; i++) {
VALUE v;
rb_str_buf_cat2(str, " ");
if (0 < i) {
if (names[i].name)
rb_str_buf_cat(str, (const char *)names[i].name, names[i].len);
else {
rb_str_catf(str, "%d", i);
}
rb_str_buf_cat2(str, ":");
}
v = rb_reg_nth_match(i, match);
if (v == Qnil)
rb_str_buf_cat2(str, "nil");
else
rb_str_buf_append(str, rb_str_inspect(v));
}
rb_str_buf_cat2(str, ">");
return str;
}
VALUE rb_cRegexp;
static int
read_escaped_byte(const char **pp, const char *end, onig_errmsg_buffer err)
{
const char *p = *pp;
int code;
int meta_prefix = 0, ctrl_prefix = 0;
size_t len;
if (p == end || *p++ != '\\') {
errcpy(err, "too short escaped multibyte character");
return -1;
}
again:
if (p == end) {
errcpy(err, "too short escape sequence");
return -1;
}
switch (*p++) {
case '\\': code = '\\'; break;
case 'n': code = '\n'; break;
case 't': code = '\t'; break;
case 'r': code = '\r'; break;
case 'f': code = '\f'; break;
case 'v': code = '\013'; break;
case 'a': code = '\007'; break;
case 'e': code = '\033'; break;
/* \OOO */
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
p--;
code = scan_oct(p, end < p+3 ? end-p : 3, &len);
p += len;
break;
case 'x': /* \xHH */
code = scan_hex(p, end < p+2 ? end-p : 2, &len);
if (len < 1) {
errcpy(err, "invalid hex escape");
return -1;
}
p += len;
break;
case 'M': /* \M-X, \M-\C-X, \M-\cX */
if (meta_prefix) {
errcpy(err, "duplicate meta escape");
return -1;
}
meta_prefix = 1;
if (p+1 < end && *p++ == '-' && (*p & 0x80) == 0) {
if (*p == '\\') {
p++;
goto again;
}
else {
code = *p++;
break;
}
}
errcpy(err, "too short meta escape");
return -1;
case 'C': /* \C-X, \C-\M-X */
if (p == end || *p++ != '-') {
errcpy(err, "too short control escape");
return -1;
}
case 'c': /* \cX, \c\M-X */
if (ctrl_prefix) {
errcpy(err, "duplicate control escape");
return -1;
}
ctrl_prefix = 1;
if (p < end && (*p & 0x80) == 0) {
if (*p == '\\') {
p++;
goto again;
}
else {
code = *p++;
break;
}
}
errcpy(err, "too short control escape");
return -1;
default:
errcpy(err, "unexpected escape sequence");
return -1;
}
if (code < 0 || 0xff < code) {
errcpy(err, "invalid escape code");
return -1;
}
if (ctrl_prefix)
code &= 0x1f;
if (meta_prefix)
code |= 0x80;
*pp = p;
return code;
}
static int
unescape_escaped_nonascii(const char **pp, const char *end, rb_encoding *enc,
VALUE buf, rb_encoding **encp, onig_errmsg_buffer err)
{
const char *p = *pp;
int chmaxlen = rb_enc_mbmaxlen(enc);
unsigned char *area = ALLOCA_N(unsigned char, chmaxlen);
char *chbuf = (char *)area;
int chlen = 0;
int byte;
int l;
memset(chbuf, 0, chmaxlen);
byte = read_escaped_byte(&p, end, err);
if (byte == -1) {
return -1;
}
area[chlen++] = byte;
while (chlen < chmaxlen &&
MBCLEN_NEEDMORE_P(rb_enc_precise_mbclen(chbuf, chbuf+chlen, enc))) {
byte = read_escaped_byte(&p, end, err);
if (byte == -1) {
return -1;
}
area[chlen++] = byte;
}
l = rb_enc_precise_mbclen(chbuf, chbuf+chlen, enc);
if (MBCLEN_INVALID_P(l)) {
errcpy(err, "invalid multibyte escape");
return -1;
}
if (1 < chlen || (area[0] & 0x80)) {
rb_str_buf_cat(buf, chbuf, chlen);
if (*encp == 0)
*encp = enc;
else if (*encp != enc) {
errcpy(err, "escaped non ASCII character in UTF-8 regexp");
return -1;
}
}
else {
char escbuf[5];
snprintf(escbuf, sizeof(escbuf), "\\x%02X", area[0]&0xff);
rb_str_buf_cat(buf, escbuf, 4);
}
*pp = p;
return 0;
}
static int
check_unicode_range(unsigned long code, onig_errmsg_buffer err)
{
if ((0xd800 <= code && code <= 0xdfff) || /* Surrogates */
0x10ffff < code) {
errcpy(err, "invalid Unicode range");
return -1;
}
return 0;
}
static int
append_utf8(unsigned long uv,
VALUE buf, rb_encoding **encp, onig_errmsg_buffer err)
{
if (check_unicode_range(uv, err) != 0)
return -1;
if (uv < 0x80) {
char escbuf[5];
snprintf(escbuf, sizeof(escbuf), "\\x%02X", (int)uv);
rb_str_buf_cat(buf, escbuf, 4);
}
else {
int len;
char utf8buf[6];
len = rb_uv_to_utf8(utf8buf, uv);
rb_str_buf_cat(buf, utf8buf, len);
if (*encp == 0)
*encp = rb_utf8_encoding();
else if (*encp != rb_utf8_encoding()) {
errcpy(err, "UTF-8 character in non UTF-8 regexp");
return -1;
}
}
return 0;
}
static int
unescape_unicode_list(const char **pp, const char *end,
VALUE buf, rb_encoding **encp, onig_errmsg_buffer err)
{
const char *p = *pp;
int has_unicode = 0;
unsigned long code;
size_t len;
while (p < end && ISSPACE(*p)) p++;
while (1) {
code = ruby_scan_hex(p, end-p, &len);
if (len == 0)
break;
if (6 < len) { /* max 10FFFF */
errcpy(err, "invalid Unicode range");
return -1;
}
p += len;
if (append_utf8(code, buf, encp, err) != 0)
return -1;
has_unicode = 1;
while (p < end && ISSPACE(*p)) p++;
}
if (has_unicode == 0) {
errcpy(err, "invalid Unicode list");
return -1;
}
*pp = p;
return 0;
}
static int
unescape_unicode_bmp(const char **pp, const char *end,
VALUE buf, rb_encoding **encp, onig_errmsg_buffer err)
{
const char *p = *pp;
size_t len;
unsigned long code;
if (end < p+4) {
errcpy(err, "invalid Unicode escape");
return -1;
}
code = ruby_scan_hex(p, 4, &len);
if (len != 4) {
errcpy(err, "invalid Unicode escape");
return -1;
}
if (append_utf8(code, buf, encp, err) != 0)
return -1;
*pp = p + 4;
return 0;
}
static int
unescape_nonascii(const char *p, const char *end, rb_encoding *enc,
VALUE buf, rb_encoding **encp, int *has_property,
onig_errmsg_buffer err)
{
unsigned char c;
char smallbuf[2];
while (p < end) {
int chlen = rb_enc_precise_mbclen(p, end, enc);
if (!MBCLEN_CHARFOUND_P(chlen)) {
invalid_multibyte:
errcpy(err, "invalid multibyte character");
return -1;
}
chlen = MBCLEN_CHARFOUND_LEN(chlen);
if (1 < chlen || (*p & 0x80)) {
multibyte:
rb_str_buf_cat(buf, p, chlen);
p += chlen;
if (*encp == 0)
*encp = enc;
else if (*encp != enc) {
errcpy(err, "non ASCII character in UTF-8 regexp");
return -1;
}
continue;
}
switch (c = *p++) {
case '\\':
if (p == end) {
errcpy(err, "too short escape sequence");
return -1;
}
chlen = rb_enc_precise_mbclen(p, end, enc);
if (!MBCLEN_CHARFOUND_P(chlen)) {
goto invalid_multibyte;
}
if ((chlen = MBCLEN_CHARFOUND_LEN(chlen)) > 1) {
/* include the previous backslash */
--p;
++chlen;
goto multibyte;
}
switch (c = *p++) {
case '1': case '2': case '3':
case '4': case '5': case '6': case '7': /* \O, \OO, \OOO or backref */
{
size_t len = end-(p-1), octlen;
if (ruby_scan_oct(p-1, len < 3 ? len : 3, &octlen) <= 0177) {
/* backref or 7bit octal.
no need to unescape anyway.
re-escaping may break backref */
goto escape_asis;
}
}
/* xxx: How about more than 199 subexpressions? */
case '0': /* \0, \0O, \0OO */
case 'x': /* \xHH */
case 'c': /* \cX, \c\M-X */
case 'C': /* \C-X, \C-\M-X */
case 'M': /* \M-X, \M-\C-X, \M-\cX */
p = p-2;
if (enc == rb_usascii_encoding()) {
const char *pbeg = p;
int byte = read_escaped_byte(&p, end, err);
if (byte == -1) return -1;
c = byte;
rb_str_buf_cat(buf, pbeg, p-pbeg);
}
else {
if (unescape_escaped_nonascii(&p, end, enc, buf, encp, err) != 0)
return -1;
}
break;
case 'u':
if (p == end) {
errcpy(err, "too short escape sequence");
return -1;
}
if (*p == '{') {
/* \u{H HH HHH HHHH HHHHH HHHHHH ...} */
p++;
if (unescape_unicode_list(&p, end, buf, encp, err) != 0)
return -1;
if (p == end || *p++ != '}') {
errcpy(err, "invalid Unicode list");
return -1;
}
break;
}
else {
/* \uHHHH */
if (unescape_unicode_bmp(&p, end, buf, encp, err) != 0)
return -1;
break;
}
case 'p': /* \p{Hiragana} */
case 'P':
if (!*encp) {
*has_property = 1;
}
goto escape_asis;
default: /* \n, \\, \d, \9, etc. */
escape_asis:
smallbuf[0] = '\\';
smallbuf[1] = c;
rb_str_buf_cat(buf, smallbuf, 2);
break;
}
break;
default:
rb_str_buf_cat(buf, (char *)&c, 1);
break;
}
}
return 0;
}
static VALUE
rb_reg_preprocess(const char *p, const char *end, rb_encoding *enc,
rb_encoding **fixed_enc, onig_errmsg_buffer err)
{
VALUE buf;
int has_property = 0;
buf = rb_str_buf_new(0);
if (rb_enc_asciicompat(enc))
*fixed_enc = 0;
else {
*fixed_enc = enc;
rb_enc_associate(buf, enc);
}
if (unescape_nonascii(p, end, enc, buf, fixed_enc, &has_property, err) != 0)
return Qnil;
if (has_property && !*fixed_enc) {
*fixed_enc = enc;
}
if (*fixed_enc) {
rb_enc_associate(buf, *fixed_enc);
}
return buf;
}
VALUE
rb_reg_check_preprocess(VALUE str)
{
rb_encoding *fixed_enc = 0;
onig_errmsg_buffer err = "";
VALUE buf;
char *p, *end;
rb_encoding *enc;
StringValue(str);
p = RSTRING_PTR(str);
end = p + RSTRING_LEN(str);
enc = rb_enc_get(str);
buf = rb_reg_preprocess(p, end, enc, &fixed_enc, err);
RB_GC_GUARD(str);
if (buf == Qnil) {
return rb_reg_error_desc(str, 0, err);
}
return Qnil;
}
static VALUE
rb_reg_preprocess_dregexp(VALUE ary, int options)
{
rb_encoding *fixed_enc = 0;
rb_encoding *regexp_enc = 0;
onig_errmsg_buffer err = "";
int i;
VALUE result = 0;
rb_encoding *ascii8bit = rb_ascii8bit_encoding();
if (RARRAY_LEN(ary) == 0) {
rb_raise(rb_eArgError, "no arguments given");
}
for (i = 0; i < RARRAY_LEN(ary); i++) {
VALUE str = RARRAY_AREF(ary, i);
VALUE buf;
char *p, *end;
rb_encoding *src_enc;
src_enc = rb_enc_get(str);
if (options & ARG_ENCODING_NONE &&
src_enc != ascii8bit) {
if (str_coderange(str) != ENC_CODERANGE_7BIT)
rb_raise(rb_eRegexpError, "/.../n has a non escaped non ASCII character in non ASCII-8BIT script");
else
src_enc = ascii8bit;
}
StringValue(str);
p = RSTRING_PTR(str);
end = p + RSTRING_LEN(str);
buf = rb_reg_preprocess(p, end, src_enc, &fixed_enc, err);
if (buf == Qnil)
rb_raise(rb_eArgError, "%s", err);
if (fixed_enc != 0) {
if (regexp_enc != 0 && regexp_enc != fixed_enc) {
rb_raise(rb_eRegexpError, "encoding mismatch in dynamic regexp : %s and %s",
rb_enc_name(regexp_enc), rb_enc_name(fixed_enc));
}
regexp_enc = fixed_enc;
}
if (!result)
result = rb_str_new3(str);
else
rb_str_buf_append(result, str);
}
if (regexp_enc) {
rb_enc_associate(result, regexp_enc);
}
return result;
}
static int
rb_reg_initialize(VALUE obj, const char *s, long len, rb_encoding *enc,
int options, onig_errmsg_buffer err,
const char *sourcefile, int sourceline)
{
struct RRegexp *re = RREGEXP(obj);
VALUE unescaped;
rb_encoding *fixed_enc = 0;
rb_encoding *a_enc = rb_ascii8bit_encoding();
rb_check_frozen(obj);
if (FL_TEST(obj, REG_LITERAL))
rb_raise(rb_eSecurityError, "can't modify literal regexp");
if (re->ptr)
rb_raise(rb_eTypeError, "already initialized regexp");
re->ptr = 0;
if (rb_enc_dummy_p(enc)) {
errcpy(err, "can't make regexp with dummy encoding");
return -1;
}
unescaped = rb_reg_preprocess(s, s+len, enc, &fixed_enc, err);
if (unescaped == Qnil)
return -1;
if (fixed_enc) {
if ((fixed_enc != enc && (options & ARG_ENCODING_FIXED)) ||
(fixed_enc != a_enc && (options & ARG_ENCODING_NONE))) {
errcpy(err, "incompatible character encoding");
return -1;
}
if (fixed_enc != a_enc) {
options |= ARG_ENCODING_FIXED;
enc = fixed_enc;
}
}
else if (!(options & ARG_ENCODING_FIXED)) {
enc = rb_usascii_encoding();
}
rb_enc_associate((VALUE)re, enc);
if ((options & ARG_ENCODING_FIXED) || fixed_enc) {
re->basic.flags |= KCODE_FIXED;
}
if (options & ARG_ENCODING_NONE) {
re->basic.flags |= REG_ENCODING_NONE;
}
re->ptr = make_regexp(RSTRING_PTR(unescaped), RSTRING_LEN(unescaped), enc,
options & ARG_REG_OPTION_MASK, err,
sourcefile, sourceline);
if (!re->ptr) return -1;
RB_GC_GUARD(unescaped);
return 0;
}
static void
reg_set_source(VALUE reg, VALUE str, rb_encoding *enc)
{
rb_encoding *regenc = rb_enc_get(reg);
if (regenc != enc) {
str = rb_enc_associate(rb_str_dup(str), enc = regenc);
}
RB_OBJ_WRITE(reg, &RREGEXP(reg)->src, rb_fstring(str));
}
static int
rb_reg_initialize_str(VALUE obj, VALUE str, int options, onig_errmsg_buffer err,
const char *sourcefile, int sourceline)
{
int ret;
rb_encoding *str_enc = rb_enc_get(str), *enc = str_enc;
if (options & ARG_ENCODING_NONE) {
rb_encoding *ascii8bit = rb_ascii8bit_encoding();
if (enc != ascii8bit) {
if (str_coderange(str) != ENC_CODERANGE_7BIT) {
errcpy(err, "/.../n has a non escaped non ASCII character in non ASCII-8BIT script");
return -1;
}
enc = ascii8bit;
}
}
ret = rb_reg_initialize(obj, RSTRING_PTR(str), RSTRING_LEN(str), enc,
options, err, sourcefile, sourceline);
if (ret == 0) reg_set_source(obj, str, str_enc);
return ret;
}
static VALUE
rb_reg_s_alloc(VALUE klass)
{
NEWOBJ_OF(re, struct RRegexp, klass, T_REGEXP | (RGENGC_WB_PROTECTED_REGEXP ? FL_WB_PROTECTED : 0));
re->ptr = 0;
RB_OBJ_WRITE(re, &re->src, 0);
re->usecnt = 0;
return (VALUE)re;
}
VALUE
rb_reg_alloc(void)
{
return rb_reg_s_alloc(rb_cRegexp);
}
VALUE
rb_reg_new_str(VALUE s, int options)
{
return rb_reg_init_str(rb_reg_alloc(), s, options);
}
VALUE
rb_reg_init_str(VALUE re, VALUE s, int options)
{
onig_errmsg_buffer err = "";
if (rb_reg_initialize_str(re, s, options, err, NULL, 0) != 0) {
rb_reg_raise_str(s, options, err);
}
return re;
}
static VALUE
rb_reg_init_str_enc(VALUE re, VALUE s, rb_encoding *enc, int options)
{
onig_errmsg_buffer err = "";
if (rb_reg_initialize(re, RSTRING_PTR(s), RSTRING_LEN(s),
enc, options, err, NULL, 0) != 0) {
rb_reg_raise_str(s, options, err);
}
reg_set_source(re, s, enc);
return re;
}
MJIT_FUNC_EXPORTED VALUE
rb_reg_new_ary(VALUE ary, int opt)
{
VALUE re = rb_reg_new_str(rb_reg_preprocess_dregexp(ary, opt), opt);
rb_obj_freeze(re);
return re;
}
VALUE
rb_enc_reg_new(const char *s, long len, rb_encoding *enc, int options)
{
VALUE re = rb_reg_alloc();
onig_errmsg_buffer err = "";
if (rb_reg_initialize(re, s, len, enc, options, err, NULL, 0) != 0) {
rb_enc_reg_raise(s, len, enc, options, err);
}
RB_OBJ_WRITE(re, &RREGEXP(re)->src, rb_fstring(rb_enc_str_new(s, len, enc)));
return re;
}
VALUE
rb_reg_new(const char *s, long len, int options)
{
return rb_enc_reg_new(s, len, rb_ascii8bit_encoding(), options);
}
VALUE
rb_reg_compile(VALUE str, int options, const char *sourcefile, int sourceline)
{
VALUE re = rb_reg_alloc();
onig_errmsg_buffer err = "";
if (!str) str = rb_str_new(0,0);
if (rb_reg_initialize_str(re, str, options, err, sourcefile, sourceline) != 0) {
rb_set_errinfo(rb_reg_error_desc(str, options, err));
return Qnil;
}
FL_SET(re, REG_LITERAL);
rb_obj_freeze(re);
return re;
}
static VALUE reg_cache;
VALUE
rb_reg_regcomp(VALUE str)
{
if (reg_cache && RREGEXP_SRC_LEN(reg_cache) == RSTRING_LEN(str)
&& ENCODING_GET(reg_cache) == ENCODING_GET(str)
&& memcmp(RREGEXP_SRC_PTR(reg_cache), RSTRING_PTR(str), RSTRING_LEN(str)) == 0)
return reg_cache;
return reg_cache = rb_reg_new_str(str, 0);
}
static st_index_t reg_hash(VALUE re);
/*
* call-seq:
* rxp.hash -> integer
*
* Produce a hash based on the text and options of this regular expression.
*
* See also Object#hash.
*/
VALUE
rb_reg_hash(VALUE re)
{
st_index_t hashval = reg_hash(re);
return ST2FIX(hashval);
}
static st_index_t
reg_hash(VALUE re)
{
st_index_t hashval;
rb_reg_check(re);
hashval = RREGEXP_PTR(re)->options;
hashval = rb_hash_uint(hashval, rb_memhash(RREGEXP_SRC_PTR(re), RREGEXP_SRC_LEN(re)));
return rb_hash_end(hashval);
}
/*
* call-seq:
* rxp == other_rxp -> true or false
* rxp.eql?(other_rxp) -> true or false
*
* Equality---Two regexps are equal if their patterns are identical, they have
* the same character set code, and their <code>casefold?</code> values are the
* same.
*
* /abc/ == /abc/x #=> false
* /abc/ == /abc/i #=> false
* /abc/ == /abc/u #=> false
* /abc/u == /abc/n #=> false
*/
VALUE
rb_reg_equal(VALUE re1, VALUE re2)
{
if (re1 == re2) return Qtrue;
if (!RB_TYPE_P(re2, T_REGEXP)) return Qfalse;
rb_reg_check(re1); rb_reg_check(re2);
if (FL_TEST(re1, KCODE_FIXED) != FL_TEST(re2, KCODE_FIXED)) return Qfalse;
if (RREGEXP_PTR(re1)->options != RREGEXP_PTR(re2)->options) return Qfalse;
if (RREGEXP_SRC_LEN(re1) != RREGEXP_SRC_LEN(re2)) return Qfalse;
if (ENCODING_GET(re1) != ENCODING_GET(re2)) return Qfalse;
if (memcmp(RREGEXP_SRC_PTR(re1), RREGEXP_SRC_PTR(re2), RREGEXP_SRC_LEN(re1)) == 0) {
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mtch.hash -> integer
*
* Produce a hash based on the target string, regexp and matched
* positions of this matchdata.
*
* See also Object#hash.
*/
static VALUE
match_hash(VALUE match)
{
const struct re_registers *regs;
st_index_t hashval;
match_check(match);
hashval = rb_hash_start(rb_str_hash(RMATCH(match)->str));
hashval = rb_hash_uint(hashval, reg_hash(match_regexp(match)));
regs = RMATCH_REGS(match);
hashval = rb_hash_uint(hashval, regs->num_regs);
hashval = rb_hash_uint(hashval, rb_memhash(regs->beg, regs->num_regs * sizeof(*regs->beg)));
hashval = rb_hash_uint(hashval, rb_memhash(regs->end, regs->num_regs * sizeof(*regs->end)));
hashval = rb_hash_end(hashval);
return ST2FIX(hashval);
}
/*
* call-seq:
* mtch == mtch2 -> true or false
* mtch.eql?(mtch2) -> true or false
*
* Equality---Two matchdata are equal if their target strings,
* patterns, and matched positions are identical.
*/
static VALUE
match_equal(VALUE match1, VALUE match2)
{
const struct re_registers *regs1, *regs2;
if (match1 == match2) return Qtrue;
if (!RB_TYPE_P(match2, T_MATCH)) return Qfalse;
if (!RMATCH(match1)->regexp || !RMATCH(match2)->regexp) return Qfalse;
if (!rb_str_equal(RMATCH(match1)->str, RMATCH(match2)->str)) return Qfalse;
if (!rb_reg_equal(match_regexp(match1), match_regexp(match2))) return Qfalse;
regs1 = RMATCH_REGS(match1);
regs2 = RMATCH_REGS(match2);
if (regs1->num_regs != regs2->num_regs) return Qfalse;
if (memcmp(regs1->beg, regs2->beg, regs1->num_regs * sizeof(*regs1->beg))) return Qfalse;
if (memcmp(regs1->end, regs2->end, regs1->num_regs * sizeof(*regs1->end))) return Qfalse;
return Qtrue;
}
static VALUE
reg_operand(VALUE s, int check)
{
if (SYMBOL_P(s)) {
return rb_sym2str(s);
}
else if (RB_TYPE_P(s, T_STRING)) {
return s;
}
else {
return check ? rb_str_to_str(s) : rb_check_string_type(s);
}
}
static long
reg_match_pos(VALUE re, VALUE *strp, long pos)
{
VALUE str = *strp;
if (NIL_P(str)) {
rb_backref_set(Qnil);
return -1;
}
*strp = str = reg_operand(str, TRUE);
if (pos != 0) {
if (pos < 0) {
VALUE l = rb_str_length(str);
pos += NUM2INT(l);
if (pos < 0) {
return pos;
}
}
pos = rb_str_offset(str, pos);
}
return rb_reg_search(re, str, pos, 0);
}
/*
* call-seq:
* rxp =~ str -> integer or nil
*
* Match---Matches <i>rxp</i> against <i>str</i>.
*
* /at/ =~ "input data" #=> 7
* /ax/ =~ "input data" #=> nil
*
* If <code>=~</code> is used with a regexp literal with named captures,
* captured strings (or nil) is assigned to local variables named by
* the capture names.
*
* /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/ =~ " x = y "
* p lhs #=> "x"
* p rhs #=> "y"
*
* If it is not matched, nil is assigned for the variables.
*
* /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/ =~ " x = "
* p lhs #=> nil
* p rhs #=> nil
*
* This assignment is implemented in the Ruby parser.
* The parser detects 'regexp-literal =~ expression' for the assignment.
* The regexp must be a literal without interpolation and placed at left hand side.
*
* The assignment does not occur if the regexp is not a literal.
*
* re = /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/
* re =~ " x = y "
* p lhs # undefined local variable
* p rhs # undefined local variable
*
* A regexp interpolation, <code>#{}</code>, also disables
* the assignment.
*
* rhs_pat = /(?<rhs>\w+)/
* /(?<lhs>\w+)\s*=\s*#{rhs_pat}/ =~ "x = y"
* p lhs # undefined local variable
*
* The assignment does not occur if the regexp is placed at the right hand side.
*
* " x = y " =~ /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/
* p lhs, rhs # undefined local variable
*
*/
VALUE
rb_reg_match(VALUE re, VALUE str)
{
long pos = reg_match_pos(re, &str, 0);
if (pos < 0) return Qnil;
pos = rb_str_sublen(str, pos);
return LONG2FIX(pos);
}
/*
* call-seq:
* rxp === str -> true or false
*
* Case Equality---Used in case statements.
*
* a = "HELLO"
* case a
* when /\A[a-z]*\z/; print "Lower case\n"
* when /\A[A-Z]*\z/; print "Upper case\n"
* else; print "Mixed case\n"
* end
* #=> "Upper case"
*
* Following a regular expression literal with the #=== operator allows you to
* compare against a String.
*
* /^[a-z]*$/ === "HELLO" #=> false
* /^[A-Z]*$/ === "HELLO" #=> true
*/
static VALUE
rb_reg_eqq(VALUE re, VALUE str)
{
long start;
str = reg_operand(str, FALSE);
if (NIL_P(str)) {
rb_backref_set(Qnil);
return Qfalse;
}
start = rb_reg_search(re, str, 0, 0);
if (start < 0) {
return Qfalse;
}
return Qtrue;
}
/*
* call-seq:
* ~ rxp -> integer or nil
*
* Match---Matches <i>rxp</i> against the contents of <code>$_</code>.
* Equivalent to <code><i>rxp</i> =~ $_</code>.
*
* $_ = "input data"
* ~ /at/ #=> 7
*/
VALUE
rb_reg_match2(VALUE re)
{
long start;
VALUE line = rb_lastline_get();
if (!RB_TYPE_P(line, T_STRING)) {
rb_backref_set(Qnil);
return Qnil;
}
start = rb_reg_search(re, line, 0, 0);
if (start < 0) {
return Qnil;
}
start = rb_str_sublen(line, start);
return LONG2FIX(start);
}
/*
* call-seq:
* rxp.match(str, pos=0) -> matchdata or nil
* rxp.match(str, pos=0) {|match| block } -> obj
*
* Returns a MatchData object describing the match, or
* <code>nil</code> if there was no match. This is equivalent to
* retrieving the value of the special variable <code>$~</code>
* following a normal match. If the second parameter is present, it
* specifies the position in the string to begin the search.
*
* /(.)(.)(.)/.match("abc")[2] #=> "b"
* /(.)(.)/.match("abc", 1)[2] #=> "c"
*
* If a block is given, invoke the block with MatchData if match succeed, so
* that you can write
*
* /M(.*)/.match("Matz") do |m|
* puts m[0]
* puts m[1]
* end
*
* instead of
*
* if m = /M(.*)/.match("Matz")
* puts m[0]
* puts m[1]
* end
*
* The return value is a value from block execution in this case.
*/
static VALUE
rb_reg_match_m(int argc, VALUE *argv, VALUE re)
{
VALUE result, str, initpos;
long pos;
if (rb_scan_args(argc, argv, "11", &str, &initpos) == 2) {
pos = NUM2LONG(initpos);
}
else {
pos = 0;
}
pos = reg_match_pos(re, &str, pos);
if (pos < 0) {
rb_backref_set(Qnil);
return Qnil;
}
result = rb_backref_get();
rb_match_busy(result);
if (!NIL_P(result) && rb_block_given_p()) {
return rb_yield(result);
}
return result;
}
/*
* call-seq:
* rxp.match?(str) -> true or false
* rxp.match?(str,pos) -> true or false
*
* Returns a <code>true</code> or <code>false</code> indicates whether the
* regexp is matched or not without updating $~ and other related variables.
* If the second parameter is present, it specifies the position in the string
* to begin the search.
*
* /R.../.match?("Ruby") #=> true
* /R.../.match?("Ruby", 1) #=> false
* /P.../.match?("Ruby") #=> false
* $& #=> nil
*/
static VALUE
rb_reg_match_m_p(int argc, VALUE *argv, VALUE re)
{
long pos = rb_check_arity(argc, 1, 2) > 1 ? NUM2LONG(argv[1]) : 0;
return rb_reg_match_p(re, argv[0], pos);
}
VALUE
rb_reg_match_p(VALUE re, VALUE str, long pos)
{
regex_t *reg;
onig_errmsg_buffer err = "";
OnigPosition result;
const UChar *start, *end;
int tmpreg;
if (NIL_P(str)) return Qfalse;
str = SYMBOL_P(str) ? rb_sym2str(str) : StringValue(str);
if (pos) {
if (pos < 0) {
pos += NUM2LONG(rb_str_length(str));
if (pos < 0) return Qfalse;
}
if (pos > 0) {
long len = 1;
const char *beg = rb_str_subpos(str, pos, &len);
if (!beg) return Qfalse;
pos = beg - RSTRING_PTR(str);
}
}
reg = rb_reg_prepare_re0(re, str, err);
tmpreg = reg != RREGEXP_PTR(re);
if (!tmpreg) RREGEXP(re)->usecnt++;
start = ((UChar*)RSTRING_PTR(str));
end = start + RSTRING_LEN(str);
result = onig_search(reg, start, end, start + pos, end,
NULL, ONIG_OPTION_NONE);
if (!tmpreg) RREGEXP(re)->usecnt--;
if (tmpreg) {
if (RREGEXP(re)->usecnt) {
onig_free(reg);
}
else {
onig_free(RREGEXP_PTR(re));
RREGEXP_PTR(re) = reg;
}
}
if (result < 0) {
if (result == ONIG_MISMATCH) {
return Qfalse;
}
else {
onig_error_code_to_str((UChar*)err, (int)result);
rb_reg_raise(RREGEXP_SRC_PTR(re), RREGEXP_SRC_LEN(re), err, re);
}
}
return Qtrue;
}
/*
* Document-method: compile
*
* Alias for Regexp.new
*/
/*
* call-seq:
* Regexp.new(string, [options]) -> regexp
* Regexp.new(regexp) -> regexp
* Regexp.compile(string, [options]) -> regexp
* Regexp.compile(regexp) -> regexp
*
* Constructs a new regular expression from +pattern+, which can be either a
* String or a Regexp (in which case that regexp's options are propagated),
* and new options may not be specified (a change as of Ruby 1.8).
*
* If +options+ is an Integer, it should be one or more of the constants
* Regexp::EXTENDED, Regexp::IGNORECASE, and Regexp::MULTILINE,
* <em>or</em>-ed together. Otherwise, if +options+ is not
* +nil+ or +false+, the regexp will be case insensitive.
*
* r1 = Regexp.new('^a-z+:\\s+\w+') #=> /^a-z+:\s+\w+/
* r2 = Regexp.new('cat', true) #=> /cat/i
* r3 = Regexp.new(r2) #=> /cat/i
* r4 = Regexp.new('dog', Regexp::EXTENDED | Regexp::IGNORECASE) #=> /dog/ix
*/
static VALUE
rb_reg_initialize_m(int argc, VALUE *argv, VALUE self)
{
int flags = 0;
VALUE str;
rb_encoding *enc = 0;
rb_check_arity(argc, 1, 3);
if (RB_TYPE_P(argv[0], T_REGEXP)) {
VALUE re = argv[0];
if (argc > 1) {
rb_warn("flags ignored");
}
rb_reg_check(re);
flags = rb_reg_options(re);
str = RREGEXP_SRC(re);
}
else {
if (argc >= 2) {
if (FIXNUM_P(argv[1])) flags = FIX2INT(argv[1]);
else if (RTEST(argv[1])) flags = ONIG_OPTION_IGNORECASE;
}
if (argc == 3 && !NIL_P(argv[2])) {
char *kcode = StringValuePtr(argv[2]);
if (kcode[0] == 'n' || kcode[0] == 'N') {
enc = rb_ascii8bit_encoding();
flags |= ARG_ENCODING_NONE;
}
else {
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "encoding option is ignored - %s", kcode);
}
}
str = StringValue(argv[0]);
}
if (enc && rb_enc_get(str) != enc)
rb_reg_init_str_enc(self, str, enc, flags);
else
rb_reg_init_str(self, str, flags);
return self;
}
VALUE
rb_reg_quote(VALUE str)
{
rb_encoding *enc = rb_enc_get(str);
char *s, *send, *t;
VALUE tmp;
int c, clen;
int ascii_only = rb_enc_str_asciionly_p(str);
s = RSTRING_PTR(str);
send = s + RSTRING_LEN(str);
while (s < send) {
c = rb_enc_ascget(s, send, &clen, enc);
if (c == -1) {
s += mbclen(s, send, enc);
continue;
}
switch (c) {
case '[': case ']': case '{': case '}':
case '(': case ')': case '|': case '-':
case '*': case '.': case '\\':
case '?': case '+': case '^': case '$':
case ' ': case '#':
case '\t': case '\f': case '\v': case '\n': case '\r':
goto meta_found;
}
s += clen;
}
tmp = rb_str_new3(str);
if (ascii_only) {
rb_enc_associate(tmp, rb_usascii_encoding());
}
return tmp;
meta_found:
tmp = rb_str_new(0, RSTRING_LEN(str)*2);
if (ascii_only) {
rb_enc_associate(tmp, rb_usascii_encoding());
}
else {
rb_enc_copy(tmp, str);
}
t = RSTRING_PTR(tmp);
/* copy upto metacharacter */
const char *p = RSTRING_PTR(str);
memcpy(t, p, s - p);
t += s - p;
while (s < send) {
c = rb_enc_ascget(s, send, &clen, enc);
if (c == -1) {
int n = mbclen(s, send, enc);
while (n--)
*t++ = *s++;
continue;
}
s += clen;
switch (c) {
case '[': case ']': case '{': case '}':
case '(': case ')': case '|': case '-':
case '*': case '.': case '\\':
case '?': case '+': case '^': case '$':
case '#':
t += rb_enc_mbcput('\\', t, enc);
break;
case ' ':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput(' ', t, enc);
continue;
case '\t':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput('t', t, enc);
continue;
case '\n':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput('n', t, enc);
continue;
case '\r':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput('r', t, enc);
continue;
case '\f':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput('f', t, enc);
continue;
case '\v':
t += rb_enc_mbcput('\\', t, enc);
t += rb_enc_mbcput('v', t, enc);
continue;
}
t += rb_enc_mbcput(c, t, enc);
}
rb_str_resize(tmp, t - RSTRING_PTR(tmp));
return tmp;
}
/*
* call-seq:
* Regexp.escape(str) -> string
* Regexp.quote(str) -> string
*
* Escapes any characters that would have special meaning in a regular
* expression. Returns a new escaped string with the same or compatible
* encoding. For any string,
* <code>Regexp.new(Regexp.escape(<i>str</i>))=~<i>str</i></code> will be true.
*
* Regexp.escape('\*?{}.') #=> \\\*\?\{\}\.
*
*/
static VALUE
rb_reg_s_quote(VALUE c, VALUE str)
{
return rb_reg_quote(reg_operand(str, TRUE));
}
int
rb_reg_options(VALUE re)
{
int options;
rb_reg_check(re);
options = RREGEXP_PTR(re)->options & ARG_REG_OPTION_MASK;
if (RBASIC(re)->flags & KCODE_FIXED) options |= ARG_ENCODING_FIXED;
if (RBASIC(re)->flags & REG_ENCODING_NONE) options |= ARG_ENCODING_NONE;
return options;
}
static VALUE
rb_check_regexp_type(VALUE re)
{
return rb_check_convert_type(re, T_REGEXP, "Regexp", "to_regexp");
}
/*
* call-seq:
* Regexp.try_convert(obj) -> re or nil
*
* Try to convert <i>obj</i> into a Regexp, using to_regexp method.
* Returns converted regexp or nil if <i>obj</i> cannot be converted
* for any reason.
*
* Regexp.try_convert(/re/) #=> /re/
* Regexp.try_convert("re") #=> nil
*
* o = Object.new
* Regexp.try_convert(o) #=> nil
* def o.to_regexp() /foo/ end
* Regexp.try_convert(o) #=> /foo/
*
*/
static VALUE
rb_reg_s_try_convert(VALUE dummy, VALUE re)
{
return rb_check_regexp_type(re);
}
static VALUE
rb_reg_s_union(VALUE self, VALUE args0)
{
long argc = RARRAY_LEN(args0);
if (argc == 0) {
VALUE args[1];
args[0] = rb_str_new2("(?!)");
return rb_class_new_instance(1, args, rb_cRegexp);
}
else if (argc == 1) {
VALUE arg = rb_ary_entry(args0, 0);
VALUE re = rb_check_regexp_type(arg);
if (!NIL_P(re))
return re;
else {
VALUE quoted;
quoted = rb_reg_s_quote(Qnil, arg);
return rb_reg_new_str(quoted, 0);
}
}
else {
int i;
VALUE source = rb_str_buf_new(0);
rb_encoding *result_enc;
int has_asciionly = 0;
rb_encoding *has_ascii_compat_fixed = 0;
rb_encoding *has_ascii_incompat = 0;
for (i = 0; i < argc; i++) {
volatile VALUE v;
VALUE e = rb_ary_entry(args0, i);
if (0 < i)
rb_str_buf_cat_ascii(source, "|");
v = rb_check_regexp_type(e);
if (!NIL_P(v)) {
rb_encoding *enc = rb_enc_get(v);
if (!rb_enc_asciicompat(enc)) {
if (!has_ascii_incompat)
has_ascii_incompat = enc;
else if (has_ascii_incompat != enc)
rb_raise(rb_eArgError, "incompatible encodings: %s and %s",
rb_enc_name(has_ascii_incompat), rb_enc_name(enc));
}
else if (rb_reg_fixed_encoding_p(v)) {
if (!has_ascii_compat_fixed)
has_ascii_compat_fixed = enc;
else if (has_ascii_compat_fixed != enc)
rb_raise(rb_eArgError, "incompatible encodings: %s and %s",
rb_enc_name(has_ascii_compat_fixed), rb_enc_name(enc));
}
else {
has_asciionly = 1;
}
v = rb_reg_str_with_term(v, -1);
}
else {
rb_encoding *enc;
StringValue(e);
enc = rb_enc_get(e);
if (!rb_enc_asciicompat(enc)) {
if (!has_ascii_incompat)
has_ascii_incompat = enc;
else if (has_ascii_incompat != enc)
rb_raise(rb_eArgError, "incompatible encodings: %s and %s",
rb_enc_name(has_ascii_incompat), rb_enc_name(enc));
}
else if (rb_enc_str_asciionly_p(e)) {
has_asciionly = 1;
}
else {
if (!has_ascii_compat_fixed)
has_ascii_compat_fixed = enc;
else if (has_ascii_compat_fixed != enc)
rb_raise(rb_eArgError, "incompatible encodings: %s and %s",
rb_enc_name(has_ascii_compat_fixed), rb_enc_name(enc));
}
v = rb_reg_s_quote(Qnil, e);
}
if (has_ascii_incompat) {
if (has_asciionly) {
rb_raise(rb_eArgError, "ASCII incompatible encoding: %s",
rb_enc_name(has_ascii_incompat));
}
if (has_ascii_compat_fixed) {
rb_raise(rb_eArgError, "incompatible encodings: %s and %s",
rb_enc_name(has_ascii_incompat), rb_enc_name(has_ascii_compat_fixed));
}
}
if (i == 0) {
rb_enc_copy(source, v);
}
rb_str_append(source, v);
}
if (has_ascii_incompat) {
result_enc = has_ascii_incompat;
}
else if (has_ascii_compat_fixed) {
result_enc = has_ascii_compat_fixed;
}
else {
result_enc = rb_ascii8bit_encoding();
}
rb_enc_associate(source, result_enc);
return rb_class_new_instance(1, &source, rb_cRegexp);
}
}
/*
* call-seq:
* Regexp.union(pat1, pat2, ...) -> new_regexp
* Regexp.union(pats_ary) -> new_regexp
*
* Return a Regexp object that is the union of the given
* <em>pattern</em>s, i.e., will match any of its parts. The
* <em>pattern</em>s can be Regexp objects, in which case their
* options will be preserved, or Strings. If no patterns are given,
* returns <code>/(?!)/</code>. The behavior is unspecified if any
* given <em>pattern</em> contains capture.
*
* Regexp.union #=> /(?!)/
* Regexp.union("penzance") #=> /penzance/
* Regexp.union("a+b*c") #=> /a\+b\*c/
* Regexp.union("skiing", "sledding") #=> /skiing|sledding/
* Regexp.union(["skiing", "sledding"]) #=> /skiing|sledding/
* Regexp.union(/dogs/, /cats/i) #=> /(?-mix:dogs)|(?i-mx:cats)/
*
* Note: the arguments for ::union will try to be converted into a regular
* expression literal via #to_regexp.
*/
static VALUE
rb_reg_s_union_m(VALUE self, VALUE args)
{
VALUE v;
if (RARRAY_LEN(args) == 1 &&
!NIL_P(v = rb_check_array_type(rb_ary_entry(args, 0)))) {
return rb_reg_s_union(self, v);
}
return rb_reg_s_union(self, args);
}
/* :nodoc: */
static VALUE
rb_reg_init_copy(VALUE copy, VALUE re)
{
if (!OBJ_INIT_COPY(copy, re)) return copy;
rb_reg_check(re);
return rb_reg_init_str(copy, RREGEXP_SRC(re), rb_reg_options(re));
}
VALUE
rb_reg_regsub(VALUE str, VALUE src, struct re_registers *regs, VALUE regexp)
{
VALUE val = 0;
char *p, *s, *e;
int no, clen;
rb_encoding *str_enc = rb_enc_get(str);
rb_encoding *src_enc = rb_enc_get(src);
int acompat = rb_enc_asciicompat(str_enc);
long n;
#define ASCGET(s,e,cl) (acompat ? (*(cl)=1,ISASCII((s)[0])?(s)[0]:-1) : rb_enc_ascget((s), (e), (cl), str_enc))
RSTRING_GETMEM(str, s, n);
p = s;
e = s + n;
while (s < e) {
int c = ASCGET(s, e, &clen);
char *ss;
if (c == -1) {
s += mbclen(s, e, str_enc);
continue;
}
ss = s;
s += clen;
if (c != '\\' || s == e) continue;
if (!val) {
val = rb_str_buf_new(ss-p);
}
rb_enc_str_buf_cat(val, p, ss-p, str_enc);
c = ASCGET(s, e, &clen);
if (c == -1) {
s += mbclen(s, e, str_enc);
rb_enc_str_buf_cat(val, ss, s-ss, str_enc);
p = s;
continue;
}
s += clen;
p = s;
switch (c) {
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (!NIL_P(regexp) && onig_noname_group_capture_is_active(RREGEXP_PTR(regexp))) {
no = c - '0';
}
else {
continue;
}
break;
case 'k':
if (s < e && ASCGET(s, e, &clen) == '<') {
char *name, *name_end;
name_end = name = s + clen;
while (name_end < e) {
c = ASCGET(name_end, e, &clen);
if (c == '>') break;
name_end += c == -1 ? mbclen(name_end, e, str_enc) : clen;
}
if (name_end < e) {
VALUE n = rb_str_subseq(str, (long)(name - RSTRING_PTR(str)),
(long)(name_end - name));
if ((no = NAME_TO_NUMBER(regs, regexp, n, name, name_end)) < 1) {
name_to_backref_error(n);
}
p = s = name_end + clen;
break;
}
else {
rb_raise(rb_eRuntimeError, "invalid group name reference format");
}
}
rb_enc_str_buf_cat(val, ss, s-ss, str_enc);
continue;
case '0':
case '&':
no = 0;
break;
case '`':
rb_enc_str_buf_cat(val, RSTRING_PTR(src), BEG(0), src_enc);
continue;
case '\'':
rb_enc_str_buf_cat(val, RSTRING_PTR(src)+END(0), RSTRING_LEN(src)-END(0), src_enc);
continue;
case '+':
no = regs->num_regs-1;
while (BEG(no) == -1 && no > 0) no--;
if (no == 0) continue;
break;
case '\\':
rb_enc_str_buf_cat(val, s-clen, clen, str_enc);
continue;
default:
rb_enc_str_buf_cat(val, ss, s-ss, str_enc);
continue;
}
if (no >= 0) {
if (no >= regs->num_regs) continue;
if (BEG(no) == -1) continue;
rb_enc_str_buf_cat(val, RSTRING_PTR(src)+BEG(no), END(no)-BEG(no), src_enc);
}
}
if (!val) return str;
if (p < e) {
rb_enc_str_buf_cat(val, p, e-p, str_enc);
}
return val;
}
static VALUE
ignorecase_getter(ID _x, VALUE *_y)
{
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "variable $= is no longer effective");
return Qfalse;
}
static void
ignorecase_setter(VALUE val, ID id, VALUE *_)
{
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "variable $= is no longer effective; ignored");
}
static VALUE
match_getter(void)
{
VALUE match = rb_backref_get();
if (NIL_P(match)) return Qnil;
rb_match_busy(match);
return match;
}
static VALUE
get_LAST_MATCH_INFO(ID _x, VALUE *_y)
{
return match_getter();
}
static void
match_setter(VALUE val, ID _x, VALUE *_y)
{
if (!NIL_P(val)) {
Check_Type(val, T_MATCH);
}
rb_backref_set(val);
}
/*
* call-seq:
* Regexp.last_match -> matchdata
* Regexp.last_match(n) -> str
*
* The first form returns the MatchData object generated by the
* last successful pattern match. Equivalent to reading the special global
* variable <code>$~</code> (see Special global variables in Regexp for
* details).
*
* The second form returns the <i>n</i>th field in this MatchData object.
* _n_ can be a string or symbol to reference a named capture.
*
* Note that the last_match is local to the thread and method scope of the
* method that did the pattern match.
*
* /c(.)t/ =~ 'cat' #=> 0
* Regexp.last_match #=> #<MatchData "cat" 1:"a">
* Regexp.last_match(0) #=> "cat"
* Regexp.last_match(1) #=> "a"
* Regexp.last_match(2) #=> nil
*
* /(?<lhs>\w+)\s*=\s*(?<rhs>\w+)/ =~ "var = val"
* Regexp.last_match #=> #<MatchData "var = val" lhs:"var" rhs:"val">
* Regexp.last_match(:lhs) #=> "var"
* Regexp.last_match(:rhs) #=> "val"
*/
static VALUE
rb_reg_s_last_match(int argc, VALUE *argv, VALUE _)
{
if (rb_check_arity(argc, 0, 1) == 1) {
VALUE match = rb_backref_get();
int n;
if (NIL_P(match)) return Qnil;
n = match_backref_number(match, argv[0]);
return rb_reg_nth_match(n, match);
}
return match_getter();
}
static void
re_warn(const char *s)
{
rb_warn("%s", s);
}
/*
* Document-class: RegexpError
*
* Raised when given an invalid regexp expression.
*
* Regexp.new("?")
*
* <em>raises the exception:</em>
*
* RegexpError: target of repeat operator is not specified: /?/
*/
/*
* Document-class: Regexp
*
* A Regexp holds a regular expression, used to match a pattern
* against strings. Regexps are created using the <code>/.../</code>
* and <code>%r{...}</code> literals, and by the Regexp::new
* constructor.
*
* :include: doc/regexp.rdoc
*/
void
Init_Regexp(void)
{
rb_eRegexpError = rb_define_class("RegexpError", rb_eStandardError);
onigenc_set_default_encoding(ONIG_ENCODING_ASCII);
onig_set_warn_func(re_warn);
onig_set_verb_warn_func(re_warn);
rb_define_virtual_variable("$~", get_LAST_MATCH_INFO, match_setter);
rb_define_virtual_variable("$&", last_match_getter, 0);
rb_define_virtual_variable("$`", prematch_getter, 0);
rb_define_virtual_variable("$'", postmatch_getter, 0);
rb_define_virtual_variable("$+", last_paren_match_getter, 0);
rb_gvar_ractor_local("$~");
rb_gvar_ractor_local("$&");
rb_gvar_ractor_local("$`");
rb_gvar_ractor_local("$'");
rb_gvar_ractor_local("$+");
rb_define_virtual_variable("$=", ignorecase_getter, ignorecase_setter);
rb_cRegexp = rb_define_class("Regexp", rb_cObject);
rb_define_alloc_func(rb_cRegexp, rb_reg_s_alloc);
rb_define_singleton_method(rb_cRegexp, "compile", rb_class_new_instance, -1);
rb_define_singleton_method(rb_cRegexp, "quote", rb_reg_s_quote, 1);
rb_define_singleton_method(rb_cRegexp, "escape", rb_reg_s_quote, 1);
rb_define_singleton_method(rb_cRegexp, "union", rb_reg_s_union_m, -2);
rb_define_singleton_method(rb_cRegexp, "last_match", rb_reg_s_last_match, -1);
rb_define_singleton_method(rb_cRegexp, "try_convert", rb_reg_s_try_convert, 1);
rb_define_method(rb_cRegexp, "initialize", rb_reg_initialize_m, -1);
rb_define_method(rb_cRegexp, "initialize_copy", rb_reg_init_copy, 1);
rb_define_method(rb_cRegexp, "hash", rb_reg_hash, 0);
rb_define_method(rb_cRegexp, "eql?", rb_reg_equal, 1);
rb_define_method(rb_cRegexp, "==", rb_reg_equal, 1);
rb_define_method(rb_cRegexp, "=~", rb_reg_match, 1);
rb_define_method(rb_cRegexp, "===", rb_reg_eqq, 1);
rb_define_method(rb_cRegexp, "~", rb_reg_match2, 0);
rb_define_method(rb_cRegexp, "match", rb_reg_match_m, -1);
rb_define_method(rb_cRegexp, "match?", rb_reg_match_m_p, -1);
rb_define_method(rb_cRegexp, "to_s", rb_reg_to_s, 0);
rb_define_method(rb_cRegexp, "inspect", rb_reg_inspect, 0);
rb_define_method(rb_cRegexp, "source", rb_reg_source, 0);
rb_define_method(rb_cRegexp, "casefold?", rb_reg_casefold_p, 0);
rb_define_method(rb_cRegexp, "options", rb_reg_options_m, 0);
rb_define_method(rb_cRegexp, "encoding", rb_obj_encoding, 0); /* in encoding.c */
rb_define_method(rb_cRegexp, "fixed_encoding?", rb_reg_fixed_encoding_p, 0);
rb_define_method(rb_cRegexp, "names", rb_reg_names, 0);
rb_define_method(rb_cRegexp, "named_captures", rb_reg_named_captures, 0);
/* see Regexp.options and Regexp.new */
rb_define_const(rb_cRegexp, "IGNORECASE", INT2FIX(ONIG_OPTION_IGNORECASE));
/* see Regexp.options and Regexp.new */
rb_define_const(rb_cRegexp, "EXTENDED", INT2FIX(ONIG_OPTION_EXTEND));
/* see Regexp.options and Regexp.new */
rb_define_const(rb_cRegexp, "MULTILINE", INT2FIX(ONIG_OPTION_MULTILINE));
/* see Regexp.options and Regexp.new */
rb_define_const(rb_cRegexp, "FIXEDENCODING", INT2FIX(ARG_ENCODING_FIXED));
/* see Regexp.options and Regexp.new */
rb_define_const(rb_cRegexp, "NOENCODING", INT2FIX(ARG_ENCODING_NONE));
rb_global_variable(&reg_cache);
rb_cMatch = rb_define_class("MatchData", rb_cObject);
rb_define_alloc_func(rb_cMatch, match_alloc);
rb_undef_method(CLASS_OF(rb_cMatch), "new");
rb_undef_method(CLASS_OF(rb_cMatch), "allocate");
rb_define_method(rb_cMatch, "initialize_copy", match_init_copy, 1);
rb_define_method(rb_cMatch, "regexp", match_regexp, 0);
rb_define_method(rb_cMatch, "names", match_names, 0);
rb_define_method(rb_cMatch, "size", match_size, 0);
rb_define_method(rb_cMatch, "length", match_size, 0);
rb_define_method(rb_cMatch, "offset", match_offset, 1);
rb_define_method(rb_cMatch, "begin", match_begin, 1);
rb_define_method(rb_cMatch, "end", match_end, 1);
rb_define_method(rb_cMatch, "to_a", match_to_a, 0);
rb_define_method(rb_cMatch, "[]", match_aref, -1);
rb_define_method(rb_cMatch, "captures", match_captures, 0);
rb_define_method(rb_cMatch, "named_captures", match_named_captures, 0);
rb_define_method(rb_cMatch, "values_at", match_values_at, -1);
rb_define_method(rb_cMatch, "pre_match", rb_reg_match_pre, 0);
rb_define_method(rb_cMatch, "post_match", rb_reg_match_post, 0);
rb_define_method(rb_cMatch, "to_s", match_to_s, 0);
rb_define_method(rb_cMatch, "inspect", match_inspect, 0);
rb_define_method(rb_cMatch, "string", match_string, 0);
rb_define_method(rb_cMatch, "hash", match_hash, 0);
rb_define_method(rb_cMatch, "eql?", match_equal, 1);
rb_define_method(rb_cMatch, "==", match_equal, 1);
}