rb_str_hash(VALUE str)
{
    int e = ENCODING_GET(str);
    if (e && rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT) {
	e = 0;
    }
    return rb_memhash((const void *)RSTRING_PTR(str), RSTRING_LEN(str)) ^ e;
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

const unsigned char *sp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_filesystem_str_new(const char *ptr, long len)
{
    return rb_external_str_new_with_enc(ptr, len, rb_filesystem_encoding());
}

* string.c (rb_str_justify): CVE-2009-4124.
  Fixes a bug reported by
  Emmanouel Kellinis <Emmanouel.Kellinis AT kpmg.co.uk>, KPMG London;
  Patch by nobu.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26038 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

#define str_buf_cat2(str, ptr) str_buf_cat(str, (ptr), strlen(ptr))

typedef unsigned char *USTR;

struct tr {
    int gen;
    unsigned int now, max;
    char *p, *pend;
}


rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

static inline void str_discard(VALUE str);


str_discard(VALUE str)
{
    str_modifiable(str);
    if (!STR_SHARED_P(str) && !STR_EMBED_P(str)) {
	xfree(RSTRING_PTR(str));
	RSTRING(str)->as.heap.ptr = 0;
	RSTRING(str)->as.heap.len = 0;
    }
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SHARED_P(s) FL_ALL(s, STR_NOEMBED|ELTS_SHARED)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_reverse(VALUE str)
{
    rb_encoding *enc;
    VALUE rev;
    char *s, *e, *p;
    int single = 1;

    if (RSTRING_LEN(str) <= 1) return rb_str_dup(str);
    enc = STR_ENC_GET(str);
    rev = rb_str_new5(str, 0, RSTRING_LEN(str));
    s = RSTRING_PTR(str); e = RSTRING_END(str);
    p = RSTRING_END(rev);

    if (RSTRING_LEN(str) > 1) {
	if (single_byte_optimizable(str)) {
	    while (s < e) {
		*--p = *s++;
	    }
	}
	else if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID) {
	    while (s < e) {
		int clen = rb_enc_fast_mbclen(s, e, enc);

		if (clen > 1 || (*s & 0x80)) single = 0;
		p -= clen;
		memcpy(p, s, clen);
		s += clen;
	    }
	}
	else {
	    while (s < e) {
		int clen = rb_enc_mbclen(s, e, enc);

		if (clen > 1 || (*s & 0x80)) single = 0;
		p -= clen;
		memcpy(p, s, clen);
		s += clen;
	    }
	}
    }
    STR_SET_LEN(rev, RSTRING_LEN(str));
    OBJ_INFECT(rev, str);
    if (ENC_CODERANGE(str) == ENC_CODERANGE_UNKNOWN) {
	if (single) {
	    ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
	}
	else {
	    ENC_CODERANGE_SET(str, ENC_CODERANGE_VALID);
	}
    }
    rb_enc_cr_str_copy_for_substr(rev, str);

    return rev;
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;


rb_str_tr_s_bang(VALUE str, VALUE src, VALUE repl)
{
    return tr_trans(str, src, repl, 1);
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


trnext(struct tr *t, rb_encoding *enc)
{
    int n;

    for (;;) {
	if (!t->gen) {
	    if (t->p == t->pend) return -1;
	    if (t->p < t->pend - 1 && *t->p == '\\') {
		t->p++;
	    }
	    t->now = rb_enc_codepoint_len(t->p, t->pend, &n, enc);
	    t->p += n;
	    if (t->p < t->pend - 1 && *t->p == '-') {
		t->p++;
		if (t->p < t->pend) {
		    unsigned int c = rb_enc_codepoint_len(t->p, t->pend, &n, enc);
		    t->p += n;
		    if (t->now > c) {
			if (t->now < 0x80 && c < 0x80) {
			    rb_raise(rb_eArgError,
				     "invalid range \"%c-%c\" in string transliteration",
				     t->now, c);
			}
			else {
			    rb_raise(rb_eArgError, "invalid range in string transliteration");
			}
			continue; /* not reached */
		    }
		    t->gen = 1;
		    t->max = c;
		}
	    }
	    return t->now;
	}
	else if (++t->now < t->max) {
	    return t->now;
	}
	else {
	    t->gen = 0;
	    return t->max;
	}
    }
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen

VALUE
rb_str_locktmp(VALUE str)
{
    if (FL_TEST(str, STR_TMPLOCK)) {
	rb_raise(rb_eRuntimeError, "temporal locking already locked string");

static VALUE get_pat(VALUE, int);

typedef unsigned char *USTR;

struct tr {
    int gen;
    unsigned int now, max;
    char *p, *pend;
}

static VALUE rb_str_delete_bang(int,VALUE*,VALUE);

#define ascii_isspace(c) isspacetable[(unsigned char)(c)]


rb_str_rpartition(VALUE str, VALUE sep)
{
    long pos = RSTRING_LEN(str);
    int regex = FALSE;

    if (TYPE(sep) == T_REGEXP) {
	pos = rb_reg_search(sep, str, pos, 1);
	regex = TRUE;
    }
    else {
	VALUE tmp;

	tmp = rb_check_string_type(sep);
	if (NIL_P(tmp)) {
	    rb_raise(rb_eTypeError, "type mismatch: %s given",
		     rb_obj_classname(sep));
	}
	sep = tmp;
	pos = rb_str_sublen(str, pos);
	pos = rb_str_rindex(str, sep, pos);
    }
    if (pos < 0) {
	return rb_ary_new3(3, rb_str_new(0,0),rb_str_new(0,0), str);
    }
    if (regex) {
	sep = rb_reg_nth_match(0, rb_backref_get());
    }
    return rb_ary_new3(3, rb_str_substr(str, 0, pos),
		          sep,
		          rb_str_substr(str,pos+str_strlen(sep,STR_ENC_GET(sep)),RSTRING_LEN(str)));
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_new(const char *ptr, long len)
{
    return str_new(rb_cString, ptr, len);
}

VALUE rb_cString;

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

#define str_buf_cat2(str, ptr) str_buf_cat(str, (ptr), strlen(ptr))

typedef unsigned char *USTR;

struct tr {
    int gen;
    unsigned int now, max;
    char *p, *pend;
}


rb_str_setter(VALUE val, ID id, VALUE *var)
{
    if (!NIL_P(val) && TYPE(val) != T_STRING) {
	rb_raise(rb_eTypeError, "value of %s must be String", rb_id2name(id));
    }
    *var = val;
}

VALUE rb_cString;

VALUE rb_cSymbol;

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

static inline void str_discard(VALUE str);

RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen

VALUE
rb_str_locktmp(VALUE str)
{
    if (FL_TEST(str, STR_TMPLOCK)) {
	rb_raise(rb_eRuntimeError, "temporal locking already locked string");

static VALUE get_pat(VALUE, int);

static VALUE rb_str_delete_bang(int,VALUE*,VALUE);


rb_str_upcase(VALUE str)
{
    str = rb_str_dup(str);
    rb_str_upcase_bang(str);
    return str;
}


rb_str_cmp_m(VALUE str1, VALUE str2)
{
    long result;

    if (TYPE(str2) != T_STRING) {
	if (!rb_respond_to(str2, rb_intern("to_str"))) {
	    return Qnil;
	}
	else if (!rb_respond_to(str2, rb_intern("<=>"))) {
	    return Qnil;
	}
	else {
	    VALUE tmp = rb_funcall(str2, rb_intern("<=>"), 1, str1);

	    if (NIL_P(tmp)) return Qnil;
	    if (!FIXNUM_P(tmp)) {
		return rb_funcall(LONG2FIX(0), '-', 1, tmp);
	    }
	    result = -FIX2LONG(tmp);
	}
    }
    else {
	result = rb_str_cmp(str1, str2);
    }
    return LONG2NUM(result);
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

static inline void str_discard(VALUE str);


rb_enc_cr_str_exact_copy(VALUE dest, VALUE src)
{
    str_enc_copy(dest, src);
    ENC_CODERANGE_SET(dest, ENC_CODERANGE(src));
}


rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;
    rb_econv_result_t ret;
    long len;
    VALUE newstr;
    const unsigned char *sp;
    unsigned char *dp;

    if (!to) return str;
    if (from == to) return str;
    if ((rb_enc_asciicompat(to) && ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) ||
	to == rb_ascii8bit_encoding()) {
	if (STR_ENC_GET(str) != to) {
	    str = rb_str_dup(str);
	    rb_enc_associate(str, to);
	}
	return str;
    }

    len = RSTRING_LEN(str);
    newstr = rb_str_new(0, len);

  retry:
    ec = rb_econv_open_opts(from->name, to->name, ecflags, ecopts);
    if (!ec) return str;

    sp = (unsigned char*)RSTRING_PTR(str);
    dp = (unsigned char*)RSTRING_PTR(newstr);
    ret = rb_econv_convert(ec, &sp, (unsigned char*)RSTRING_END(str),
			   &dp, (unsigned char*)RSTRING_END(newstr), 0);
    rb_econv_close(ec);
    switch (ret) {
      case econv_destination_buffer_full:
	/* destination buffer short */
	len *= 2;
	rb_str_resize(newstr, len);
	goto retry;

      case econv_finished:
	len = dp - (unsigned char*)RSTRING_PTR(newstr);
	rb_str_set_len(newstr, len);
	rb_enc_associate(newstr, to);
	return newstr;

      default:
	/* some error, return original */
	return str;
    }
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

rb_econv_result_t ret;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_dump(VALUE str)
{
    rb_encoding *enc = rb_enc_get(str);
    long len;
    const char *p, *pend;
    char *q, *qend;
    VALUE result;
    int u8 = (enc == rb_utf8_encoding());

    len = 2;			/* "" */
    p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
    while (p < pend) {
	unsigned char c = *p++;
	switch (c) {
	  case '"':  case '\\':
	  case '\n': case '\r':
	  case '\t': case '\f':
	  case '\013': case '\010': case '\007': case '\033':
	    len += 2;
	    break;

	  case '#':
	    len += IS_EVSTR(p, pend) ? 2 : 1;
	    break;

	  default:
	    if (ISPRINT(c)) {
		len++;
	    }
	    else {
		if (u8) {	/* \u{NN} */
		    char buf[32];
		    int n = rb_enc_precise_mbclen(p-1, pend, enc);
		    if (MBCLEN_CHARFOUND_P(n)) {
			int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
			sprintf(buf, "%x", cc);
			len += strlen(buf)+4;
			p += MBCLEN_CHARFOUND_LEN(n)-1;
			break;
		    }
		}
		len += 4;	/* \xNN */
	    }
	    break;
	}
    }
    if (!rb_enc_asciicompat(enc)) {
	len += 19;		/* ".force_encoding('')" */
	len += strlen(enc->name);
    }

    result = rb_str_new5(str, 0, len);
    p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
    q = RSTRING_PTR(result); qend = q + len + 1;

    *q++ = '"';
    while (p < pend) {
	unsigned char c = *p++;

	if (c == '"' || c == '\\') {
	    *q++ = '\\';
	    *q++ = c;
	}
	else if (c == '#') {
	    if (IS_EVSTR(p, pend)) *q++ = '\\';
	    *q++ = '#';
	}
	else if (c == '\n') {
	    *q++ = '\\';
	    *q++ = 'n';
	}
	else if (c == '\r') {
	    *q++ = '\\';
	    *q++ = 'r';
	}
	else if (c == '\t') {
	    *q++ = '\\';
	    *q++ = 't';
	}
	else if (c == '\f') {
	    *q++ = '\\';
	    *q++ = 'f';
	}
	else if (c == '\013') {
	    *q++ = '\\';
	    *q++ = 'v';
	}
	else if (c == '\010') {
	    *q++ = '\\';
	    *q++ = 'b';
	}
	else if (c == '\007') {
	    *q++ = '\\';
	    *q++ = 'a';
	}
	else if (c == '\033') {
	    *q++ = '\\';
	    *q++ = 'e';
	}
	else if (ISPRINT(c)) {
	    *q++ = c;
	}
	else {
	    *q++ = '\\';
	    if (u8) {
		int n = rb_enc_precise_mbclen(p-1, pend, enc) - 1;
		if (MBCLEN_CHARFOUND_P(n)) {
		    int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
		    p += n;
		    snprintf(q, qend-q, "u{%x}", cc);
		    q += strlen(q);
		    continue;
		}
	    }
	    snprintf(q, qend-q, "x%02X", c);
	    q += 3;
	}
    }
    *q++ = '"';
    *q = '\0';
    if (!rb_enc_asciicompat(enc)) {
	snprintf(q, qend-q, ".force_encoding(\"%s\")", enc->name);
	enc = rb_ascii8bit_encoding();
    }
    OBJ_INFECT(result, str);
    /* result from dump is ASCII */
    rb_enc_associate(result, enc);
    ENC_CODERANGE_SET(result, ENC_CODERANGE_7BIT);
    return result;
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;


sym_inspect(VALUE sym)
{
    VALUE str;
    ID id = SYM2ID(sym);
    rb_encoding *enc;

    sym = rb_id2str(id);
    enc = STR_ENC_GET(sym);
    str = rb_enc_str_new(0, RSTRING_LEN(sym)+1, enc);
    RSTRING_PTR(str)[0] = ':';
    memcpy(RSTRING_PTR(str)+1, RSTRING_PTR(sym), RSTRING_LEN(sym));
    if (RSTRING_LEN(sym) != (long)strlen(RSTRING_PTR(sym)) ||
	!rb_enc_symname_p(RSTRING_PTR(sym), enc) ||
	!sym_printable(RSTRING_PTR(sym), RSTRING_END(sym), enc)) {
	str = rb_str_inspect(str);
	memcpy(RSTRING_PTR(str), ":\"", 2);
    }
    return str;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


str_replace_shared(VALUE str2, VALUE str)
{
    if (RSTRING_LEN(str) <= RSTRING_EMBED_LEN_MAX) {
	STR_SET_EMBED(str2);
	memcpy(RSTRING_PTR(str2), RSTRING_PTR(str), RSTRING_LEN(str)+1);
	STR_SET_EMBED_LEN(str2, RSTRING_LEN(str));
    }
    else {
	FL_SET(str2, STR_NOEMBED);
	str = rb_str_new_frozen(str);
	RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
	RSTRING(str2)->as.heap.ptr = RSTRING_PTR(str);
	RSTRING(str2)->as.heap.aux.shared = str;
	FL_SET(str2, ELTS_SHARED);
    }
    rb_enc_cr_str_exact_copy(str2, str);

    return str2;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_NOEMBED FL_USER1

#define STR_SHARED  FL_USER2 /* = ELTS_SHARED */

#define STR_SHARED_P(s) FL_ALL(s, STR_NOEMBED|ELTS_SHARED)

#define STR_ASSOC_P(s)  FL_ALL(s, STR_NOEMBED|STR_ASSOC)

#define STR_NOCAPA  (STR_NOEMBED|ELTS_SHARED|STR_ASSOC)

#define STR_NOCAPA_P(s) (FL_TEST(s,STR_NOEMBED) && FL_ANY(s,ELTS_SHARED|STR_ASSOC))

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;


rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
    int ptr_encindex, int ptr_cr, int *ptr_cr_ret)
{
    int str_encindex = ENCODING_GET(str);
    int res_encindex;
    int str_cr, res_cr;
    int str_a8 = ENCODING_IS_ASCII8BIT(str);
    int ptr_a8 = ptr_encindex == 0;

    str_cr = ENC_CODERANGE(str);

    if (str_encindex == ptr_encindex) {
        if (str_cr == ENC_CODERANGE_UNKNOWN ||
            (ptr_a8 && str_cr != ENC_CODERANGE_7BIT)) {
            ptr_cr = ENC_CODERANGE_UNKNOWN;
        }
        else if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
            ptr_cr = coderange_scan(ptr, len, rb_enc_from_index(ptr_encindex));
        }
    }
    else {
        rb_encoding *str_enc = rb_enc_from_index(str_encindex);
        rb_encoding *ptr_enc = rb_enc_from_index(ptr_encindex);
        if (!rb_enc_asciicompat(str_enc) || !rb_enc_asciicompat(ptr_enc)) {
            if (len == 0)
                return str;
            if (RSTRING_LEN(str) == 0) {
                rb_str_buf_cat(str, ptr, len);
                ENCODING_CODERANGE_SET(str, ptr_encindex, ptr_cr);
                return str;
            }
            goto incompatible;
        }
	if (ptr_cr == ENC_CODERANGE_UNKNOWN) {
	    ptr_cr = coderange_scan(ptr, len, ptr_enc);
	}
        if (str_cr == ENC_CODERANGE_UNKNOWN) {
            if (str_a8 || ptr_cr != ENC_CODERANGE_7BIT) {
                str_cr = rb_enc_str_coderange(str);
            }
        }
    }
    if (ptr_cr_ret)
        *ptr_cr_ret = ptr_cr;

    if (str_encindex != ptr_encindex &&
        str_cr != ENC_CODERANGE_7BIT &&
        ptr_cr != ENC_CODERANGE_7BIT) {
      incompatible:
        rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s",
            rb_enc_name(rb_enc_from_index(str_encindex)),
            rb_enc_name(rb_enc_from_index(ptr_encindex)));
    }

    if (str_cr == ENC_CODERANGE_UNKNOWN) {
        res_encindex = str_encindex;
        res_cr = ENC_CODERANGE_UNKNOWN;
    }
    else if (str_cr == ENC_CODERANGE_7BIT) {
        if (ptr_cr == ENC_CODERANGE_7BIT) {
            res_encindex = !str_a8 ? str_encindex : ptr_encindex;
            res_cr = ENC_CODERANGE_7BIT;
        }
        else {
            res_encindex = ptr_encindex;
            res_cr = ptr_cr;
        }
    }
    else if (str_cr == ENC_CODERANGE_VALID) {
        res_encindex = str_encindex;
        res_cr = str_cr;
    }
    else { /* str_cr == ENC_CODERANGE_BROKEN */
        res_encindex = str_encindex;
        res_cr = str_cr;
        if (0 < len) res_cr = ENC_CODERANGE_UNKNOWN;
    }

    if (len < 0) {
	rb_raise(rb_eArgError, "negative string size (or size too big)");
    }
    str_buf_cat(str, ptr, len);
    ENCODING_CODERANGE_SET(str, res_encindex, res_cr);
    return str;
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_aset_m(int argc, VALUE *argv, VALUE str)
{
    if (argc == 3) {
	if (TYPE(argv[0]) == T_REGEXP) {
	    rb_str_subpat_set(str, argv[0], argv[1], argv[2]);
	}
	else {
	    rb_str_splice(str, NUM2LONG(argv[0]), NUM2LONG(argv[1]), argv[2]);
	}
	return argv[2];
    }
    if (argc != 2) {
	rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)", argc);
    }
    return rb_str_aset(str, argv[0], argv[1]);
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_comparable(VALUE str1, VALUE str2)
{
    int idx1, idx2;
    int rc1, rc2;

    if (RSTRING_LEN(str1) == 0) return TRUE;
    if (RSTRING_LEN(str2) == 0) return TRUE;
    idx1 = ENCODING_GET(str1);
    idx2 = ENCODING_GET(str2);
    if (idx1 == idx2) return TRUE;
    rc1 = rb_enc_str_coderange(str1);
    rc2 = rb_enc_str_coderange(str2);
    if (rc1 == ENC_CODERANGE_7BIT) {
	if (rc2 == ENC_CODERANGE_7BIT) return TRUE;
	if (rb_enc_asciicompat(rb_enc_from_index(idx2)))
	    return TRUE;
    }
    if (rc2 == ENC_CODERANGE_7BIT) {
	if (rb_enc_asciicompat(rb_enc_from_index(idx1)))
	    return TRUE;
    }
    return FALSE;
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

static inline void str_discard(VALUE str);

RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen

VALUE
rb_str_locktmp(VALUE str)
{
    if (FL_TEST(str, STR_TMPLOCK)) {
	rb_raise(rb_eRuntimeError, "temporal locking already locked string");


rb_str_length(VALUE str)
{
    long len;

    len = str_strlen(str, STR_ENC_GET(str));
    return LONG2NUM(len);
}


rb_str_modify(VALUE str)
{
    if (!str_independent(str))
	str_make_independent(str);
    ENC_CODERANGE_CLEAR(str);
}


rb_str_capitalize(VALUE str)
{
    str = rb_str_dup(str);
    rb_str_capitalize_bang(str);
    return str;
}


single_byte_optimizable(VALUE str)
{
    rb_encoding *enc;

    /* Conservative.  It may be ENC_CODERANGE_UNKNOWN. */
    if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
        return 1;

    enc = STR_ENC_GET(str);
    if (rb_enc_mbmaxlen(enc) == 1)
        return 1;

    /* Conservative.  Possibly single byte.
     * "\xa1" in Shift_JIS for example. */
    return 0;
}


sym_downcase(VALUE sym)
{
    return rb_str_intern(rb_str_downcase(rb_id2str(SYM2ID(sym))));
}


rb_str_count(int argc, VALUE *argv, VALUE str)
{
    char table[256];
    rb_encoding *enc = 0;
    VALUE del = 0, nodel = 0;
    char *s, *send;
    int i;
    int ascompat;

    if (argc < 1) {
	rb_raise(rb_eArgError, "wrong number of arguments");
    }
    for (i=0; i<argc; i++) {
	VALUE tstr = argv[i];
	unsigned char c;

	StringValue(tstr);
	enc = rb_enc_check(str, tstr);
	if (argc == 1 && RSTRING_LEN(tstr) == 1 && rb_enc_asciicompat(enc) &&
	    (c = RSTRING_PTR(tstr)[0]) < 0x80 && !is_broken_string(str)) {
	    int n = 0;

	    s = RSTRING_PTR(str);
	    if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
	    send = RSTRING_END(str);
	    while (s < send) {
		if (*(unsigned char*)s++ == c) n++;
	    }
	    return INT2NUM(n);
	}
	tr_setup_table(tstr, table, i==0, &del, &nodel, enc);
    }

    s = RSTRING_PTR(str);
    if (!s || RSTRING_LEN(str) == 0) return INT2FIX(0);
    send = RSTRING_END(str);
    ascompat = rb_enc_asciicompat(enc);
    i = 0;
    while (s < send) {
	unsigned int c;
	int clen;

	if (ascompat && (c = *(unsigned char*)s) < 0x80) {
	    clen = 1;
	    if (table[c]) {
		i++;
	    }
	    s++;
	}
	else {
	    c = rb_enc_codepoint_len(s, send, &clen, enc);
	    if (tr_find(c, table, del, nodel)) {
		i++;
	    }
	    s += clen;
	}
    }

    return INT2NUM(i);
}


rb_tainted_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

    OBJ_TAINT(str);
    return str;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_swapcase_bang(VALUE str)
{
    rb_encoding *enc;
    char *s, *send;
    int modify = 0;
    int n;

    str_modify_keep_cr(str);
    enc = STR_ENC_GET(str);
    rb_str_check_dummy_enc(enc);
    s = RSTRING_PTR(str); send = RSTRING_END(str);
    while (s < send) {
	unsigned int c = rb_enc_codepoint_len(s, send, &n, enc);

	if (rb_enc_isupper(c, enc)) {
	    /* assuming toupper returns codepoint with same size */
	    rb_enc_mbcput(rb_enc_tolower(c, enc), s, enc);
	    modify = 1;
	}
	else if (rb_enc_islower(c, enc)) {
	    /* assuming tolower returns codepoint with same size */
	    rb_enc_mbcput(rb_enc_toupper(c, enc), s, enc);
	    modify = 1;
	}
	s += n;
    }

    if (modify) return str;
    return Qnil;
}


rb_usascii_str_new(const char *ptr, long len)
{
    VALUE str = rb_str_new(ptr, len);
    ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT);
    return str;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


str_modify_keep_cr(VALUE str)
{
    if (!str_independent(str))
	str_make_independent(str);
    if (ENC_CODERANGE(str) == ENC_CODERANGE_BROKEN)
	/* Force re-scan later */
	ENC_CODERANGE_CLEAR(str);
}


rb_str_each_line(int argc, VALUE *argv, VALUE str)
{
    rb_encoding *enc;
    VALUE rs;
    unsigned int newline;
    const char *p, *pend, *s, *ptr;
    long len, rslen;
    VALUE line;
    int n;
    VALUE orig = str;

    if (argc == 0) {
	rs = rb_rs;
    }
    else {
	rb_scan_args(argc, argv, "01", &rs);
    }
    RETURN_ENUMERATOR(str, argc, argv);
    if (NIL_P(rs)) {
	rb_yield(str);
	return orig;
    }
    str = rb_str_new4(str);
    ptr = p = s = RSTRING_PTR(str);
    pend = p + RSTRING_LEN(str);
    len = RSTRING_LEN(str);
    StringValue(rs);
    if (rs == rb_default_rs) {
	enc = rb_enc_get(str);
	while (p < pend) {
	    char *p0;

	    p = memchr(p, '\n', pend - p);
	    if (!p) break;
	    p0 = rb_enc_left_char_head(s, p, pend, enc);
	    if (!rb_enc_is_newline(p0, pend, enc)) {
		p++;
		continue;
	    }
	    p = p0 + rb_enc_mbclen(p0, pend, enc);
	    line = rb_str_new5(str, s, p - s);
	    OBJ_INFECT(line, str);
	    rb_enc_cr_str_copy_for_substr(line, str);
	    rb_yield(line);
	    str_mod_check(str, ptr, len);
	    s = p;
	}
	goto finish;
    }

    enc = rb_enc_check(str, rs);
    rslen = RSTRING_LEN(rs);
    if (rslen == 0) {
	newline = '\n';
    }
    else {
	newline = rb_enc_codepoint(RSTRING_PTR(rs), RSTRING_END(rs), enc);
    }

    while (p < pend) {
	unsigned int c = rb_enc_codepoint_len(p, pend, &n, enc);

      again:
	if (rslen == 0 && c == newline) {
	    p += n;
	    if (p < pend && (c = rb_enc_codepoint_len(p, pend, &n, enc)) != newline) {
		goto again;
	    }
	    while (p < pend && rb_enc_codepoint(p, pend, enc) == newline) {
		p += n;
	    }
	    p -= n;
	}
	if (c == newline &&
	    (rslen <= 1 || memcmp(RSTRING_PTR(rs), p, rslen) == 0)) {
	    line = rb_str_new5(str, s, p - s + (rslen ? rslen : n));
	    OBJ_INFECT(line, str);
	    rb_enc_cr_str_copy_for_substr(line, str);
	    rb_yield(line);
	    str_mod_check(str, ptr, len);
	    s = p + (rslen ? rslen : n);
	}
	p += n;
    }

  finish:
    if (s != pend) {
	line = rb_str_new5(str, s, pend - s);
	OBJ_INFECT(line, str);
	rb_enc_cr_str_copy_for_substr(line, str);
	rb_yield(line);
    }

    return orig;
}


sym_succ(VALUE sym)
{
    return rb_str_intern(rb_str_succ(rb_sym_to_s(sym)));
}


sym_empty(VALUE sym)
{
    return rb_str_empty(rb_id2str(SYM2ID(sym)));
}


rb_str_substr(VALUE str, long beg, long len)
{
    rb_encoding *enc = STR_ENC_GET(str);
    VALUE str2;
    char *p, *s = RSTRING_PTR(str), *e = s + RSTRING_LEN(str);

    if (len < 0) return Qnil;
    if (!RSTRING_LEN(str)) {
	len = 0;
    }
    if (single_byte_optimizable(str)) {
	if (beg > RSTRING_LEN(str)) return Qnil;
	if (beg < 0) {
	    beg += RSTRING_LEN(str);
	    if (beg < 0) return Qnil;
	}
	if (beg + len > RSTRING_LEN(str))
	    len = RSTRING_LEN(str) - beg;
	if (len <= 0) {
	    len = 0;
	    p = 0;
	}
	else
	    p = s + beg;
	goto sub;
    }
    if (beg < 0) {
	if (len > -beg) len = -beg;
	if (-beg * rb_enc_mbmaxlen(enc) < RSTRING_LEN(str) / 8) {
	    beg = -beg;
	    while (beg-- > len && (e = rb_enc_prev_char(s, e, e, enc)) != 0);
	    p = e;
	    if (!p) return Qnil;
	    while (len-- > 0 && (p = rb_enc_prev_char(s, p, e, enc)) != 0);
	    if (!p) return Qnil;
	    len = e - p;
	    goto sub;
	}
	else {
	    beg += str_strlen(str, enc);
	    if (beg < 0) return Qnil;
	}
    }
    else if (beg > 0 && beg > str_strlen(str, enc)) {
	return Qnil;
    }
    if (len == 0) {
	p = 0;
    }
#ifdef NONASCII_MASK
    else if (ENC_CODERANGE(str) == ENC_CODERANGE_VALID &&
        enc == rb_utf8_encoding()) {
        p = str_utf8_nth(s, e, beg);
        len = str_utf8_offset(p, e, len);
    }
#endif
    else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
	int char_sz = rb_enc_mbmaxlen(enc);

	p = s + beg * char_sz;
	if (p > e) {
	    p = e;
	    len = 0;
	}
        else if (len * char_sz > e - p)
            len = e - p;
        else
	    len *= char_sz;
    }
    else if ((p = str_nth(s, e, beg, enc, 0)) == e) {
	len = 0;
    }
    else {
	len = str_offset(p, e, len, enc, 0);
    }
  sub:
    if (len > RSTRING_EMBED_LEN_MAX && beg + len == RSTRING_LEN(str)) {
	str2 = rb_str_new4(str);
	str2 = str_new3(rb_obj_class(str2), str2);
	RSTRING(str2)->as.heap.ptr += RSTRING(str2)->as.heap.len - len;
	RSTRING(str2)->as.heap.len = len;
    }
    else {
	str2 = rb_str_new5(str, p, len);
	rb_enc_cr_str_copy_for_substr(str2, str);
	OBJ_INFECT(str2, str);
    }

    return str2;
}

#define BEG(no) regs->beg[no]

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;


rb_str_hex(VALUE str)
{
    rb_encoding *enc = rb_enc_get(str);

    if (!rb_enc_asciicompat(enc)) {
	rb_raise(rb_eEncCompatError, "ASCII incompatible encoding: %s", rb_enc_name(enc));
    }
    return rb_str_to_inum(str, 16, FALSE);
}


enc_succ_char(char *p, long len, rb_encoding *enc)
{
    long i;
    int l;
    while (1) {
        for (i = len-1; 0 <= i && (unsigned char)p[i] == 0xff; i--)
            p[i] = '\0';
        if (i < 0)
            return NEIGHBOR_WRAPPED;
        ++((unsigned char*)p)[i];
        l = rb_enc_precise_mbclen(p, p+len, enc);
        if (MBCLEN_CHARFOUND_P(l)) {
            l = MBCLEN_CHARFOUND_LEN(l);
            if (l == len) {
                return NEIGHBOR_FOUND;
            }
            else {
                memset(p+l, 0xff, len-l);
            }
        }
        if (MBCLEN_INVALID_P(l) && i < len-1) {
            long len2;
            int l2;
            for (len2 = len-1; 0 < len2; len2--) {
                l2 = rb_enc_precise_mbclen(p, p+len2, enc);
                if (!MBCLEN_INVALID_P(l2))
                    break;
            }
            memset(p+len2+1, 0xff, len-(len2+1));
        }
    }
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);


rb_str_s_try_convert(VALUE dummy, VALUE str)
{
    return rb_check_string_type(str);
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


str_new(VALUE klass, const char *ptr, long len)
{
    VALUE str;

    if (len < 0) {
	rb_raise(rb_eArgError, "negative string size (or size too big)");
    }

    str = str_alloc(klass);
    if (len > RSTRING_EMBED_LEN_MAX) {
	RSTRING(str)->as.heap.aux.capa = len;
	RSTRING(str)->as.heap.ptr = ALLOC_N(char,len+1);
	STR_SET_NOEMBED(str);
    }
    else if (len == 0) {
	ENC_CODERANGE_SET(str, ENC_CODERANGE_7BIT);
    }
    if (ptr) {
	memcpy(RSTRING_PTR(str), ptr, len);
    }
    STR_SET_LEN(str, len);
    RSTRING_PTR(str)[len] = '\0';
    return str;
}


rb_str_resize(VALUE str, long len)
{
    long slen;

    if (len < 0) {
	rb_raise(rb_eArgError, "negative string size (or size too big)");
    }

    rb_str_modify(str);
    slen = RSTRING_LEN(str);
    if (len != slen) {
	if (STR_EMBED_P(str)) {
	    char *ptr;
	    if (len <= RSTRING_EMBED_LEN_MAX) {
		STR_SET_EMBED_LEN(str, len);
		RSTRING(str)->as.ary[len] = '\0';
		return str;
	    }
	    ptr = ALLOC_N(char,len+1);
	    MEMCPY(ptr, RSTRING(str)->as.ary, char, slen);
	    RSTRING(str)->as.heap.ptr = ptr;
	    STR_SET_NOEMBED(str);
	}
	else if (len <= RSTRING_EMBED_LEN_MAX) {
	    char *ptr = RSTRING(str)->as.heap.ptr;
	    STR_SET_EMBED(str);
	    if (slen > 0) MEMCPY(RSTRING(str)->as.ary, ptr, char, len);
	    RSTRING(str)->as.ary[len] = '\0';
	    STR_SET_EMBED_LEN(str, len);
	    xfree(ptr);
	    return str;
	}
	else if (slen < len || slen - len > 1024) {
	    REALLOC_N(RSTRING(str)->as.heap.ptr, char, len+1);
	}
	if (!STR_NOCAPA_P(str)) {
	    RSTRING(str)->as.heap.aux.capa = len;
	}
	RSTRING(str)->as.heap.len = len;
	RSTRING(str)->as.heap.ptr[len] = '\0';	/* sentinel */
    }
    return str;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_NOCAPA_P(s) (FL_TEST(s,STR_NOEMBED) && FL_ANY(s,ELTS_SHARED|STR_ASSOC))

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);


rb_str_chomp(int argc, VALUE *argv, VALUE str)
{
    str = rb_str_dup(str);
    rb_str_chomp_bang(argc, argv, str);
    return str;
}


rb_str_casecmp(VALUE str1, VALUE str2)
{
    long len;
    rb_encoding *enc;
    char *p1, *p1end, *p2, *p2end;

    StringValue(str2);
    enc = rb_enc_compatible(str1, str2);
    if (!enc) {
	return Qnil;
    }

    p1 = RSTRING_PTR(str1); p1end = RSTRING_END(str1);
    p2 = RSTRING_PTR(str2); p2end = RSTRING_END(str2);
    if (single_byte_optimizable(str1) && single_byte_optimizable(str2)) {
	while (p1 < p1end && p2 < p2end) {
	    if (*p1 != *p2) {
		unsigned int c1 = TOUPPER(*p1 & 0xff);
		unsigned int c2 = TOUPPER(*p2 & 0xff);
                if (c1 != c2)
                    return INT2FIX(c1 < c2 ? -1 : 1);
	    }
	    p1++;
	    p2++;
	}
    }
    else {
	while (p1 < p1end && p2 < p2end) {
            int l1, c1 = rb_enc_ascget(p1, p1end, &l1, enc);
            int l2, c2 = rb_enc_ascget(p2, p2end, &l2, enc);

            if (0 <= c1 && 0 <= c2) {
                c1 = TOUPPER(c1);
                c2 = TOUPPER(c2);
                if (c1 != c2)
                    return INT2FIX(c1 < c2 ? -1 : 1);
            }
            else {
                int r;
                l1 = rb_enc_mbclen(p1, p1end, enc);
                l2 = rb_enc_mbclen(p2, p2end, enc);
                len = l1 < l2 ? l1 : l2;
                r = memcmp(p1, p2, len);
                if (r != 0)
                    return INT2FIX(r < 0 ? -1 : 1);
                if (l1 != l2)
                    return INT2FIX(l1 < l2 ? -1 : 1);
            }
	    p1 += l1;
	    p2 += l2;
	}
    }
    if (RSTRING_LEN(str1) == RSTRING_LEN(str2)) return INT2FIX(0);
    if (RSTRING_LEN(str1) > RSTRING_LEN(str2)) return INT2FIX(1);
    return INT2FIX(-1);
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);


rb_str_set_len(VALUE str, long len)
{
    STR_SET_LEN(str, len);
    RSTRING_PTR(str)[len] = '\0';
}


rb_str_reverse_bang(VALUE str)
{
    if (RSTRING_LEN(str) > 1) {
	if (single_byte_optimizable(str)) {
	    char *s, *e, c;

	    str_modify_keep_cr(str);
	    s = RSTRING_PTR(str);
	    e = RSTRING_END(str) - 1;
	    while (s < e) {
		c = *s;
		*s++ = *e;
		*e-- = c;
	    }
	}
	else {
	    rb_str_shared_replace(str, rb_str_reverse(str));
	}
    }
    else {
	str_modify_keep_cr(str);
    }
    return str;
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;


str_make_independent(VALUE str)
{
    char *ptr;
    long len = RSTRING_LEN(str);

    ptr = ALLOC_N(char, len+1);
    if (RSTRING_PTR(str)) {
	memcpy(ptr, RSTRING_PTR(str), len);
    }
    STR_SET_NOEMBED(str);
    ptr[len] = 0;
    RSTRING(str)->as.heap.ptr = ptr;
    RSTRING(str)->as.heap.len = len;
    RSTRING(str)->as.heap.aux.capa = len;
    STR_UNSET_NOCAPA(str);
}

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_UNSET_NOCAPA(s) do {\
    if (FL_TEST(s,STR_NOEMBED)) FL_UNSET(s,(ELTS_SHARED|STR_ASSOC));\
} while (0)

#define STR_SET_NOEMBED(str) do {\
    FL_SET(str, STR_NOEMBED);\
    STR_SET_EMBED_LEN(str, 0);\
} while (0)

#define STR_SET_EMBED(str) FL_UNSET(str, STR_NOEMBED)

#define STR_EMBED_P(str) (!FL_TEST(str, STR_NOEMBED))

#define STR_SET_EMBED_LEN(str, n) do { \
    long tmp_n = (n);\
    RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
    RBASIC(str)->flags |= (tmp_n) << RSTRING_EMBED_LEN_SHIFT;\
} while (0)

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

#define is_ascii_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_7BIT)

#define is_broken_string(str) (rb_enc_str_coderange(str) == ENC_CODERANGE_BROKEN)

#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

long len;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;


tr_find(unsigned int c, char table[256], VALUE del, VALUE nodel)
{
    if (c < 256) {
	return table[c] != 0;
    }
    else {
	VALUE v = UINT2NUM(c);

	if (del && !NIL_P(rb_hash_lookup(del, v))) {
	    if (!nodel || NIL_P(rb_hash_lookup(nodel, v))) {
		return TRUE;
	    }
	}
	return FALSE;
    }
}

#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))

VALUE rb_cString;

VALUE rb_cSymbol;

#define STR_SET_LEN(str, n) do { \
    if (STR_EMBED_P(str)) {\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len = (n);\
    }\
} while (0)

#define STR_DEC_LEN(str) do {\
    if (STR_EMBED_P(str)) {\
	long n = RSTRING_LEN(str);\
	n--;\
	STR_SET_EMBED_LEN(str, n);\
    }\
    else {\
	RSTRING(str)->as.heap.len--;\
    }\
} while (0)

#define RESIZE_CAPA(str,capacity) do {\
    if (STR_EMBED_P(str)) {\
	if ((capacity) > RSTRING_EMBED_LEN_MAX) {\
	    char *tmp = ALLOC_N(char, capacity+1);\
	    memcpy(tmp, RSTRING_PTR(str), RSTRING_LEN(str));\
	    RSTRING(str)->as.heap.ptr = tmp;\
	    RSTRING(str)->as.heap.len = RSTRING_LEN(str);\
            STR_SET_NOEMBED(str);\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
	}\
    }\
    else {\
	REALLOC_N(RSTRING(str)->as.heap.ptr, char, (capacity)+1);\
	if (!STR_NOCAPA_P(str))\
	    RSTRING(str)->as.heap.aux.capa = (capacity);\
    }\
} while (0)

VALUE rb_fs;

RUBY_ALIAS_FUNCTION(rb_str_new2(const char *ptr), rb_str_new_cstr, (ptr))
#define rb_str_new2 rb_str_new_cstr

VALUE
rb_usascii_str_new_cstr(const char *ptr)
{
    VALUE str = rb_str_new2(ptr);

RUBY_ALIAS_FUNCTION(rb_tainted_str_new2(const char *ptr), rb_tainted_str_new_cstr, (ptr))
#define rb_tainted_str_new2 rb_tainted_str_new_cstr

VALUE
rb_str_conv_enc_opts(VALUE str, rb_encoding *from, rb_encoding *to, int ecflags, VALUE ecopts)
{
    rb_econv_t *ec;

VALUE newstr;

const unsigned char *sp;

unsigned char *dp;

RUBY_ALIAS_FUNCTION(rb_str_new3(VALUE str), rb_str_new_shared, (str))
#define rb_str_new3 rb_str_new_shared

static VALUE
str_new4(VALUE klass, VALUE str)
{
    VALUE str2;

RUBY_ALIAS_FUNCTION(rb_str_new4(VALUE orig), rb_str_new_frozen, (orig))
#define rb_str_new4 rb_str_new_frozen

VALUE
rb_str_new_with_class(VALUE obj, const char *ptr, long len)
{
    return str_new(rb_obj_class(obj), ptr, len);

RUBY_ALIAS_FUNCTION(rb_str_new5(VALUE obj, const char *ptr, long len),
	   rb_str_new_with_class, (obj, ptr, len))
#define rb_str_new5 rb_str_new_with_class

#define STR_BUF_MIN_SIZE 128

VALUE
rb_str_buf_new(long capa)
{
    VALUE str = str_alloc(rb_cString);

RUBY_ALIAS_FUNCTION(rb_str_buf_new2(const char *ptr), rb_str_buf_new_cstr, (ptr))
#define rb_str_buf_new2 rb_str_buf_new_cstr

VALUE
rb_str_tmp_new(long len)
{
    return str_new(0, 0, len);

static inline void str_discard(VALUE str);

RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
#define rb_str_dup_frozen rb_str_new_frozen

VALUE
rb_str_locktmp(VALUE str)
{
    if (FL_TEST(str, STR_TMPLOCK)) {
	rb_raise(rb_eRuntimeError, "temporal locking already locked string");