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mbed I/F binding for mruby
Dependents: mruby_mbed_web mirb_mbed
mbed-mruby
How to use
Class
src/string.c
- Committer:
- mzta
- Date:
- 2015-04-13
- Revision:
- 1:8ccd1d494a4b
- Parent:
- 0:158c61bb030f
File content as of revision 1:8ccd1d494a4b:
/*
** string.c - String class
**
** See Copyright Notice in mruby.h
*/
#include <ctype.h>
#include <float.h>
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "mruby.h"
#include "mruby/array.h"
#include "mruby/class.h"
#include "mruby/range.h"
#include "mruby/string.h"
#include "mruby/re.h"
const char mrb_digitmap[] = "0123456789abcdefghijklmnopqrstuvwxyz";
typedef struct mrb_shared_string {
mrb_bool nofree : 1;
int refcnt;
char *ptr;
mrb_int len;
} mrb_shared_string;
static mrb_value str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2);
static mrb_value mrb_str_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len);
MRB_API mrb_int
mrb_str_strlen(mrb_state *mrb, struct RString *s)
{
mrb_int i, max = RSTR_LEN(s);
char *p = RSTR_PTR(s);
if (!p) return 0;
for (i=0; i<max; i++) {
if (p[i] == '\0') {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
}
}
return max;
}
static inline void
resize_capa(mrb_state *mrb, struct RString *s, mrb_int capacity)
{
if (RSTR_EMBED_P(s)) {
if (RSTRING_EMBED_LEN_MAX < capacity) {
char *const tmp = (char *)mrb_malloc(mrb, capacity+1);
const mrb_int len = RSTR_EMBED_LEN(s);
memcpy(tmp, s->as.ary, len);
RSTR_UNSET_EMBED_FLAG(s);
s->as.heap.ptr = tmp;
s->as.heap.len = len;
s->as.heap.aux.capa = capacity;
}
}
else {
s->as.heap.ptr = (char *)mrb_realloc(mrb, RSTR_PTR(s), capacity+1);
s->as.heap.aux.capa = capacity;
}
}
static void
str_decref(mrb_state *mrb, mrb_shared_string *shared)
{
shared->refcnt--;
if (shared->refcnt == 0) {
if (!shared->nofree) {
mrb_free(mrb, shared->ptr);
}
mrb_free(mrb, shared);
}
}
MRB_API void
mrb_str_modify(mrb_state *mrb, struct RString *s)
{
if (RSTR_SHARED_P(s)) {
mrb_shared_string *shared = s->as.heap.aux.shared;
if (shared->refcnt == 1 && s->as.heap.ptr == shared->ptr) {
s->as.heap.ptr = shared->ptr;
s->as.heap.aux.capa = shared->len;
RSTR_PTR(s)[s->as.heap.len] = '\0';
mrb_free(mrb, shared);
}
else {
char *ptr, *p;
mrb_int len;
p = RSTR_PTR(s);
len = s->as.heap.len;
ptr = (char *)mrb_malloc(mrb, (size_t)len + 1);
if (p) {
memcpy(ptr, p, len);
}
ptr[len] = '\0';
s->as.heap.ptr = ptr;
s->as.heap.aux.capa = len;
str_decref(mrb, shared);
}
RSTR_UNSET_SHARED_FLAG(s);
return;
}
if (RSTR_NOFREE_P(s)) {
char *p = s->as.heap.ptr;
s->as.heap.ptr = (char *)mrb_malloc(mrb, (size_t)s->as.heap.len+1);
if (p) {
memcpy(RSTR_PTR(s), p, s->as.heap.len);
}
RSTR_PTR(s)[s->as.heap.len] = '\0';
s->as.heap.aux.capa = s->as.heap.len;
RSTR_UNSET_NOFREE_FLAG(s);
return;
}
}
MRB_API mrb_value
mrb_str_resize(mrb_state *mrb, mrb_value str, mrb_int len)
{
mrb_int slen;
struct RString *s = mrb_str_ptr(str);
mrb_str_modify(mrb, s);
slen = RSTR_LEN(s);
if (len != slen) {
if (slen < len || slen - len > 256) {
resize_capa(mrb, s, len);
}
RSTR_SET_LEN(s, len);
RSTR_PTR(s)[len] = '\0'; /* sentinel */
}
return str;
}
#define mrb_obj_alloc_string(mrb) ((struct RString*)mrb_obj_alloc((mrb), MRB_TT_STRING, (mrb)->string_class))
static struct RString*
str_new_static(mrb_state *mrb, const char *p, size_t len)
{
struct RString *s;
if (len >= MRB_INT_MAX) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
}
s = mrb_obj_alloc_string(mrb);
s->as.heap.len = len;
s->as.heap.aux.capa = 0; /* nofree */
s->as.heap.ptr = (char *)p;
s->flags = MRB_STR_NOFREE;
return s;
}
static struct RString*
str_new(mrb_state *mrb, const char *p, size_t len)
{
struct RString *s;
if (mrb_ro_data_p(p)) {
return str_new_static(mrb, p, len);
}
s = mrb_obj_alloc_string(mrb);
if (len < RSTRING_EMBED_LEN_MAX) {
RSTR_SET_EMBED_FLAG(s);
RSTR_SET_EMBED_LEN(s, len);
if (p) {
memcpy(s->as.ary, p, len);
}
} else {
if (len >= MRB_INT_MAX) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
}
s->as.heap.len = len;
s->as.heap.aux.capa = len;
s->as.heap.ptr = (char *)mrb_malloc(mrb, len+1);
if (p) {
memcpy(s->as.heap.ptr, p, len);
}
}
RSTR_PTR(s)[len] = '\0';
return s;
}
static inline void
str_with_class(mrb_state *mrb, struct RString *s, mrb_value obj)
{
s->c = mrb_str_ptr(obj)->c;
}
static mrb_value
mrb_str_new_empty(mrb_state *mrb, mrb_value str)
{
struct RString *s = str_new(mrb, 0, 0);
str_with_class(mrb, s, str);
return mrb_obj_value(s);
}
#ifndef MRB_STR_BUF_MIN_SIZE
# define MRB_STR_BUF_MIN_SIZE 128
#endif
MRB_API mrb_value
mrb_str_buf_new(mrb_state *mrb, size_t capa)
{
struct RString *s;
s = mrb_obj_alloc_string(mrb);
if (capa >= MRB_INT_MAX) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string capacity size too big");
}
if (capa < MRB_STR_BUF_MIN_SIZE) {
capa = MRB_STR_BUF_MIN_SIZE;
}
s->as.heap.len = 0;
s->as.heap.aux.capa = capa;
s->as.heap.ptr = (char *)mrb_malloc(mrb, capa+1);
RSTR_PTR(s)[0] = '\0';
return mrb_obj_value(s);
}
static void
str_buf_cat(mrb_state *mrb, struct RString *s, const char *ptr, size_t len)
{
size_t capa;
size_t total;
ptrdiff_t off = -1;
if (len == 0) return;
mrb_str_modify(mrb, s);
if (ptr >= RSTR_PTR(s) && ptr <= RSTR_PTR(s) + (size_t)RSTR_LEN(s)) {
off = ptr - RSTR_PTR(s);
}
if (RSTR_EMBED_P(s))
capa = RSTRING_EMBED_LEN_MAX;
else
capa = s->as.heap.aux.capa;
if (RSTR_LEN(s) >= MRB_INT_MAX - (mrb_int)len) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
}
total = RSTR_LEN(s)+len;
if (capa <= total) {
while (total > capa) {
if (capa + 1 >= MRB_INT_MAX / 2) {
capa = (total + 4095) / 4096;
break;
}
capa = (capa + 1) * 2;
}
resize_capa(mrb, s, capa);
}
if (off != -1) {
ptr = RSTR_PTR(s) + off;
}
memcpy(RSTR_PTR(s) + RSTR_LEN(s), ptr, len);
mrb_assert_int_fit(size_t, total, mrb_int, MRB_INT_MAX);
RSTR_SET_LEN(s, total);
RSTR_PTR(s)[total] = '\0'; /* sentinel */
}
MRB_API mrb_value
mrb_str_new(mrb_state *mrb, const char *p, size_t len)
{
return mrb_obj_value(str_new(mrb, p, len));
}
/*
* call-seq: (Caution! NULL string)
* String.new(str="") => new_str
*
* Returns a new string object containing a copy of <i>str</i>.
*/
MRB_API mrb_value
mrb_str_new_cstr(mrb_state *mrb, const char *p)
{
struct RString *s;
size_t len;
if (p) {
len = strlen(p);
}
else {
len = 0;
}
s = str_new(mrb, p, len);
return mrb_obj_value(s);
}
MRB_API mrb_value
mrb_str_new_static(mrb_state *mrb, const char *p, size_t len)
{
struct RString *s = str_new_static(mrb, p, len);
return mrb_obj_value(s);
}
void
mrb_gc_free_str(mrb_state *mrb, struct RString *str)
{
if (RSTR_EMBED_P(str))
/* no code */;
else if (RSTR_SHARED_P(str))
str_decref(mrb, str->as.heap.aux.shared);
else if (!RSTR_NOFREE_P(str))
mrb_free(mrb, str->as.heap.ptr);
}
MRB_API char*
mrb_str_to_cstr(mrb_state *mrb, mrb_value str0)
{
struct RString *s;
if (!mrb_string_p(str0)) {
mrb_raise(mrb, E_TYPE_ERROR, "expected String");
}
s = str_new(mrb, RSTRING_PTR(str0), RSTRING_LEN(str0));
if ((strlen(RSTR_PTR(s)) ^ RSTR_LEN(s)) != 0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
}
return RSTR_PTR(s);
}
static void
str_make_shared(mrb_state *mrb, struct RString *s)
{
if (!RSTR_SHARED_P(s)) {
mrb_shared_string *shared = (mrb_shared_string *)mrb_malloc(mrb, sizeof(mrb_shared_string));
shared->refcnt = 1;
if (RSTR_EMBED_P(s)) {
const mrb_int len = RSTR_EMBED_LEN(s);
char *const tmp = (char *)mrb_malloc(mrb, len+1);
memcpy(tmp, s->as.ary, len);
tmp[len] = '\0';
RSTR_UNSET_EMBED_FLAG(s);
s->as.heap.ptr = tmp;
s->as.heap.len = len;
shared->nofree = FALSE;
shared->ptr = s->as.heap.ptr;
}
else if (RSTR_NOFREE_P(s)) {
shared->nofree = TRUE;
shared->ptr = s->as.heap.ptr;
RSTR_UNSET_NOFREE_FLAG(s);
}
else {
shared->nofree = FALSE;
if (s->as.heap.aux.capa > s->as.heap.len) {
s->as.heap.ptr = shared->ptr = (char *)mrb_realloc(mrb, s->as.heap.ptr, s->as.heap.len+1);
}
else {
shared->ptr = s->as.heap.ptr;
}
}
shared->len = s->as.heap.len;
s->as.heap.aux.shared = shared;
RSTR_SET_SHARED_FLAG(s);
}
}
/*
* call-seq: (Caution! String("abcd") change)
* String("abcdefg") = String("abcd") + String("efg")
*
* Returns a new string object containing a copy of <i>str</i>.
*/
MRB_API void
mrb_str_concat(mrb_state *mrb, mrb_value self, mrb_value other)
{
struct RString *s1 = mrb_str_ptr(self), *s2;
mrb_int len;
mrb_str_modify(mrb, s1);
if (!mrb_string_p(other)) {
other = mrb_str_to_str(mrb, other);
}
s2 = mrb_str_ptr(other);
len = RSTR_LEN(s1) + RSTR_LEN(s2);
if (RSTRING_CAPA(self) < len) {
resize_capa(mrb, s1, len);
}
memcpy(RSTR_PTR(s1)+RSTR_LEN(s1), RSTR_PTR(s2), RSTR_LEN(s2));
RSTR_SET_LEN(s1, len);
RSTR_PTR(s1)[len] = '\0';
}
/*
* call-seq: (Caution! String("abcd") remain)
* String("abcdefg") = String("abcd") + String("efg")
*
* Returns a new string object containing a copy of <i>str</i>.
*/
MRB_API mrb_value
mrb_str_plus(mrb_state *mrb, mrb_value a, mrb_value b)
{
struct RString *s = mrb_str_ptr(a);
struct RString *s2 = mrb_str_ptr(b);
struct RString *t;
t = str_new(mrb, 0, RSTR_LEN(s) + RSTR_LEN(s2));
memcpy(RSTR_PTR(t), RSTR_PTR(s), RSTR_LEN(s));
memcpy(RSTR_PTR(t) + RSTR_LEN(s), RSTR_PTR(s2), RSTR_LEN(s2));
return mrb_obj_value(t);
}
/* 15.2.10.5.2 */
/*
* call-seq: (Caution! String("abcd") remain) for stack_argument
* String("abcdefg") = String("abcd") + String("efg")
*
* Returns a new string object containing a copy of <i>str</i>.
*/
static mrb_value
mrb_str_plus_m(mrb_state *mrb, mrb_value self)
{
mrb_value str;
mrb_get_args(mrb, "S", &str);
return mrb_str_plus(mrb, self, str);
}
/* 15.2.10.5.26 */
/* 15.2.10.5.33 */
/*
* call-seq:
* len = strlen(String("abcd"))
*
* Returns the length of string.
*/
static mrb_value
mrb_str_size(mrb_state *mrb, mrb_value self)
{
struct RString *s = mrb_str_ptr(self);
return mrb_fixnum_value(RSTR_LEN(s));
}
/* 15.2.10.5.1 */
/*
* call-seq:
* str * integer => new_str
*
* Copy---Returns a new <code>String</code> containing <i>integer</i> copies of
* the receiver.
*
* "Ho! " * 3 #=> "Ho! Ho! Ho! "
*/
static mrb_value
mrb_str_times(mrb_state *mrb, mrb_value self)
{
mrb_int n,len,times;
struct RString *str2;
char *p;
mrb_get_args(mrb, "i", ×);
if (times < 0) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "negative argument");
}
if (times && MRB_INT_MAX / times < RSTRING_LEN(self)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "argument too big");
}
len = RSTRING_LEN(self)*times;
str2 = str_new(mrb, 0, len);
str_with_class(mrb, str2, self);
p = RSTR_PTR(str2);
if (len > 0) {
n = RSTRING_LEN(self);
memcpy(p, RSTRING_PTR(self), n);
while (n <= len/2) {
memcpy(p + n, p, n);
n *= 2;
}
memcpy(p + n, p, len-n);
}
p[RSTR_LEN(str2)] = '\0';
return mrb_obj_value(str2);
}
/* -------------------------------------------------------------- */
#define lesser(a,b) (((a)>(b))?(b):(a))
/* ---------------------------*/
/*
* call-seq:
* mrb_value str1 <=> mrb_value str2 => int
* > 1
* = 0
* < -1
*/
MRB_API int
mrb_str_cmp(mrb_state *mrb, mrb_value str1, mrb_value str2)
{
mrb_int len;
mrb_int retval;
struct RString *s1 = mrb_str_ptr(str1);
struct RString *s2 = mrb_str_ptr(str2);
len = lesser(RSTR_LEN(s1), RSTR_LEN(s2));
retval = memcmp(RSTR_PTR(s1), RSTR_PTR(s2), len);
if (retval == 0) {
if (RSTR_LEN(s1) == RSTR_LEN(s2)) return 0;
if (RSTR_LEN(s1) > RSTR_LEN(s2)) return 1;
return -1;
}
if (retval > 0) return 1;
return -1;
}
/* 15.2.10.5.3 */
/*
* call-seq:
* str <=> other_str => -1, 0, +1
*
* Comparison---Returns -1 if <i>other_str</i> is less than, 0 if
* <i>other_str</i> is equal to, and +1 if <i>other_str</i> is greater than
* <i>str</i>. If the strings are of different lengths, and the strings are
* equal when compared up to the shortest length, then the longer string is
* considered greater than the shorter one. If the variable <code>$=</code> is
* <code>false</code>, the comparison is based on comparing the binary values
* of each character in the string. In older versions of Ruby, setting
* <code>$=</code> allowed case-insensitive comparisons; this is now deprecated
* in favor of using <code>String#casecmp</code>.
*
* <code><=></code> is the basis for the methods <code><</code>,
* <code><=</code>, <code>></code>, <code>>=</code>, and <code>between?</code>,
* included from module <code>Comparable</code>. The method
* <code>String#==</code> does not use <code>Comparable#==</code>.
*
* "abcdef" <=> "abcde" #=> 1
* "abcdef" <=> "abcdef" #=> 0
* "abcdef" <=> "abcdefg" #=> -1
* "abcdef" <=> "ABCDEF" #=> 1
*/
static mrb_value
mrb_str_cmp_m(mrb_state *mrb, mrb_value str1)
{
mrb_value str2;
mrb_int result;
mrb_get_args(mrb, "o", &str2);
if (!mrb_string_p(str2)) {
if (!mrb_respond_to(mrb, str2, mrb_intern_lit(mrb, "to_s"))) {
return mrb_nil_value();
}
else if (!mrb_respond_to(mrb, str2, mrb_intern_lit(mrb, "<=>"))) {
return mrb_nil_value();
}
else {
mrb_value tmp = mrb_funcall(mrb, str2, "<=>", 1, str1);
if (mrb_nil_p(tmp)) return mrb_nil_value();
if (!mrb_fixnum(tmp)) {
return mrb_funcall(mrb, mrb_fixnum_value(0), "-", 1, tmp);
}
result = -mrb_fixnum(tmp);
}
}
else {
result = mrb_str_cmp(mrb, str1, str2);
}
return mrb_fixnum_value(result);
}
static mrb_bool
str_eql(mrb_state *mrb, const mrb_value str1, const mrb_value str2)
{
const mrb_int len = RSTRING_LEN(str1);
if (len != RSTRING_LEN(str2)) return FALSE;
if (memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), (size_t)len) == 0)
return TRUE;
return FALSE;
}
MRB_API mrb_bool
mrb_str_equal(mrb_state *mrb, mrb_value str1, mrb_value str2)
{
if (mrb_immediate_p(str2)) return FALSE;
if (!mrb_string_p(str2)) {
if (mrb_nil_p(str2)) return FALSE;
if (!mrb_respond_to(mrb, str2, mrb_intern_lit(mrb, "to_str"))) {
return FALSE;
}
str2 = mrb_funcall(mrb, str2, "to_str", 0);
return mrb_equal(mrb, str2, str1);
}
return str_eql(mrb, str1, str2);
}
/* 15.2.10.5.4 */
/*
* call-seq:
* str == obj => true or false
*
* Equality---
* If <i>obj</i> is not a <code>String</code>, returns <code>false</code>.
* Otherwise, returns <code>false</code> or <code>true</code>
*
* caution:if <i>str</i> <code><=></code> <i>obj</i> returns zero.
*/
static mrb_value
mrb_str_equal_m(mrb_state *mrb, mrb_value str1)
{
mrb_value str2;
mrb_get_args(mrb, "o", &str2);
return mrb_bool_value(mrb_str_equal(mrb, str1, str2));
}
/* ---------------------------------- */
MRB_API mrb_value
mrb_str_to_str(mrb_state *mrb, mrb_value str)
{
mrb_value s;
if (!mrb_string_p(str)) {
s = mrb_check_convert_type(mrb, str, MRB_TT_STRING, "String", "to_str");
if (mrb_nil_p(s)) {
s = mrb_convert_type(mrb, str, MRB_TT_STRING, "String", "to_s");
}
return s;
}
return str;
}
MRB_API const char*
mrb_string_value_ptr(mrb_state *mrb, mrb_value ptr)
{
mrb_value str = mrb_str_to_str(mrb, ptr);
return RSTRING_PTR(str);
}
void
mrb_noregexp(mrb_state *mrb, mrb_value self)
{
mrb_raise(mrb, E_NOTIMP_ERROR, "Regexp class not implemented");
}
void
mrb_regexp_check(mrb_state *mrb, mrb_value obj)
{
if (mrb_regexp_p(mrb, obj)) {
mrb_noregexp(mrb, obj);
}
}
static inline mrb_int
mrb_memsearch_qs(const unsigned char *xs, mrb_int m, const unsigned char *ys, mrb_int n)
{
const unsigned char *x = xs, *xe = xs + m;
const unsigned char *y = ys;
int i, qstable[256];
/* Preprocessing */
for (i = 0; i < 256; ++i)
qstable[i] = m + 1;
for (; x < xe; ++x)
qstable[*x] = xe - x;
/* Searching */
for (; y + m <= ys + n; y += *(qstable + y[m])) {
if (*xs == *y && memcmp(xs, y, m) == 0)
return y - ys;
}
return -1;
}
static mrb_int
mrb_memsearch(const void *x0, mrb_int m, const void *y0, mrb_int n)
{
const unsigned char *x = (const unsigned char *)x0, *y = (const unsigned char *)y0;
if (m > n) return -1;
else if (m == n) {
return memcmp(x0, y0, m) == 0 ? 0 : -1;
}
else if (m < 1) {
return 0;
}
else if (m == 1) {
const unsigned char *ys = y, *ye = ys + n;
for (; y < ye; ++y) {
if (*x == *y)
return y - ys;
}
return -1;
}
return mrb_memsearch_qs((const unsigned char *)x0, m, (const unsigned char *)y0, n);
}
static mrb_int
mrb_str_index(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int offset)
{
mrb_int pos;
char *s, *sptr;
mrb_int len, slen;
len = RSTRING_LEN(str);
slen = RSTRING_LEN(sub);
if (offset < 0) {
offset += len;
if (offset < 0) return -1;
}
if (len - offset < slen) return -1;
s = RSTRING_PTR(str);
if (offset) {
s += offset;
}
if (slen == 0) return offset;
/* need proceed one character at a time */
sptr = RSTRING_PTR(sub);
slen = RSTRING_LEN(sub);
len = RSTRING_LEN(str) - offset;
pos = mrb_memsearch(sptr, slen, s, len);
if (pos < 0) return pos;
return pos + offset;
}
MRB_API mrb_value
mrb_str_dup(mrb_state *mrb, mrb_value str)
{
struct RString *s = mrb_str_ptr(str);
struct RString *dup = str_new(mrb, 0, 0);
str_with_class(mrb, dup, str);
return str_replace(mrb, dup, s);
}
static mrb_value
mrb_str_aref(mrb_state *mrb, mrb_value str, mrb_value indx)
{
mrb_int idx;
mrb_regexp_check(mrb, indx);
switch (mrb_type(indx)) {
case MRB_TT_FIXNUM:
idx = mrb_fixnum(indx);
num_index:
str = mrb_str_substr(mrb, str, idx, 1);
if (!mrb_nil_p(str) && RSTRING_LEN(str) == 0) return mrb_nil_value();
return str;
case MRB_TT_STRING:
if (mrb_str_index(mrb, str, indx, 0) != -1)
return mrb_str_dup(mrb, indx);
return mrb_nil_value();
case MRB_TT_RANGE:
/* check if indx is Range */
{
mrb_int beg, len;
len = RSTRING_LEN(str);
if (mrb_range_beg_len(mrb, indx, &beg, &len, len)) {
return mrb_str_subseq(mrb, str, beg, len);
}
else {
return mrb_nil_value();
}
}
default:
idx = mrb_fixnum(indx);
goto num_index;
}
return mrb_nil_value(); /* not reached */
}
/* 15.2.10.5.6 */
/* 15.2.10.5.34 */
/*
* call-seq:
* str[fixnum] => fixnum or nil
* str[fixnum, fixnum] => new_str or nil
* str[range] => new_str or nil
* str[regexp] => new_str or nil
* str[regexp, fixnum] => new_str or nil
* str[other_str] => new_str or nil
* str.slice(fixnum) => fixnum or nil
* str.slice(fixnum, fixnum) => new_str or nil
* str.slice(range) => new_str or nil
* str.slice(other_str) => new_str or nil
*
* Element Reference---If passed a single <code>Fixnum</code>, returns the code
* of the character at that position. If passed two <code>Fixnum</code>
* objects, returns a substring starting at the offset given by the first, and
* a length given by the second. If given a range, a substring containing
* characters at offsets given by the range is returned. In all three cases, if
* an offset is negative, it is counted from the end of <i>str</i>. Returns
* <code>nil</code> if the initial offset falls outside the string, the length
* is negative, or the beginning of the range is greater than the end.
*
* If a <code>String</code> is given, that string is returned if it occurs in
* <i>str</i>. In both cases, <code>nil</code> is returned if there is no
* match.
*
* a = "hello there"
* a[1] #=> 101(1.8.7) "e"(1.9.2)
* a[1,3] #=> "ell"
* a[1..3] #=> "ell"
* a[-3,2] #=> "er"
* a[-4..-2] #=> "her"
* a[12..-1] #=> nil
* a[-2..-4] #=> ""
* a["lo"] #=> "lo"
* a["bye"] #=> nil
*/
static mrb_value
mrb_str_aref_m(mrb_state *mrb, mrb_value str)
{
mrb_value a1, a2;
int argc;
argc = mrb_get_args(mrb, "o|o", &a1, &a2);
if (argc == 2) {
mrb_regexp_check(mrb, a1);
return mrb_str_substr(mrb, str, mrb_fixnum(a1), mrb_fixnum(a2));
}
if (argc != 1) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "wrong number of arguments (%S for 1)", mrb_fixnum_value(argc));
}
return mrb_str_aref(mrb, str, a1);
}
/* 15.2.10.5.8 */
/*
* call-seq:
* str.capitalize! => str or nil
*
* Modifies <i>str</i> by converting the first character to uppercase and the
* remainder to lowercase. Returns <code>nil</code> if no changes are made.
*
* a = "hello"
* a.capitalize! #=> "Hello"
* a #=> "Hello"
* a.capitalize! #=> nil
*/
static mrb_value
mrb_str_capitalize_bang(mrb_state *mrb, mrb_value str)
{
char *p, *pend;
mrb_bool modify = FALSE;
struct RString *s = mrb_str_ptr(str);
mrb_str_modify(mrb, s);
if (RSTR_LEN(s) == 0 || !RSTR_PTR(s)) return mrb_nil_value();
p = RSTR_PTR(s); pend = RSTR_PTR(s) + RSTR_LEN(s);
if (ISLOWER(*p)) {
*p = TOUPPER(*p);
modify = TRUE;
}
while (++p < pend) {
if (ISUPPER(*p)) {
*p = TOLOWER(*p);
modify = TRUE;
}
}
if (modify) return str;
return mrb_nil_value();
}
/* 15.2.10.5.7 */
/*
* call-seq:
* str.capitalize => new_str
*
* Returns a copy of <i>str</i> with the first character converted to uppercase
* and the remainder to lowercase.
*
* "hello".capitalize #=> "Hello"
* "HELLO".capitalize #=> "Hello"
* "123ABC".capitalize #=> "123abc"
*/
static mrb_value
mrb_str_capitalize(mrb_state *mrb, mrb_value self)
{
mrb_value str;
str = mrb_str_dup(mrb, self);
mrb_str_capitalize_bang(mrb, str);
return str;
}
/* 15.2.10.5.10 */
/*
* call-seq:
* str.chomp!(separator=$/) => str or nil
*
* Modifies <i>str</i> in place as described for <code>String#chomp</code>,
* returning <i>str</i>, or <code>nil</code> if no modifications were made.
*/
static mrb_value
mrb_str_chomp_bang(mrb_state *mrb, mrb_value str)
{
mrb_value rs;
mrb_int newline;
char *p, *pp;
mrb_int rslen;
mrb_int len;
struct RString *s = mrb_str_ptr(str);
mrb_str_modify(mrb, s);
len = RSTR_LEN(s);
if (mrb_get_args(mrb, "|S", &rs) == 0) {
if (len == 0) return mrb_nil_value();
smart_chomp:
if (RSTR_PTR(s)[len-1] == '\n') {
RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
if (RSTR_LEN(s) > 0 &&
RSTR_PTR(s)[RSTR_LEN(s)-1] == '\r') {
RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
}
}
else if (RSTR_PTR(s)[len-1] == '\r') {
RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
}
else {
return mrb_nil_value();
}
RSTR_PTR(s)[RSTR_LEN(s)] = '\0';
return str;
}
if (len == 0 || mrb_nil_p(rs)) return mrb_nil_value();
p = RSTR_PTR(s);
rslen = RSTRING_LEN(rs);
if (rslen == 0) {
while (len>0 && p[len-1] == '\n') {
len--;
if (len>0 && p[len-1] == '\r')
len--;
}
if (len < RSTR_LEN(s)) {
RSTR_SET_LEN(s, len);
p[len] = '\0';
return str;
}
return mrb_nil_value();
}
if (rslen > len) return mrb_nil_value();
newline = RSTRING_PTR(rs)[rslen-1];
if (rslen == 1 && newline == '\n')
newline = RSTRING_PTR(rs)[rslen-1];
if (rslen == 1 && newline == '\n')
goto smart_chomp;
pp = p + len - rslen;
if (p[len-1] == newline &&
(rslen <= 1 ||
memcmp(RSTRING_PTR(rs), pp, rslen) == 0)) {
RSTR_SET_LEN(s, len - rslen);
p[RSTR_LEN(s)] = '\0';
return str;
}
return mrb_nil_value();
}
/* 15.2.10.5.9 */
/*
* call-seq:
* str.chomp(separator=$/) => new_str
*
* Returns a new <code>String</code> with the given record separator removed
* from the end of <i>str</i> (if present). If <code>$/</code> has not been
* changed from the default Ruby record separator, then <code>chomp</code> also
* removes carriage return characters (that is it will remove <code>\n</code>,
* <code>\r</code>, and <code>\r\n</code>).
*
* "hello".chomp #=> "hello"
* "hello\n".chomp #=> "hello"
* "hello\r\n".chomp #=> "hello"
* "hello\n\r".chomp #=> "hello\n"
* "hello\r".chomp #=> "hello"
* "hello \n there".chomp #=> "hello \n there"
* "hello".chomp("llo") #=> "he"
*/
static mrb_value
mrb_str_chomp(mrb_state *mrb, mrb_value self)
{
mrb_value str;
str = mrb_str_dup(mrb, self);
mrb_str_chomp_bang(mrb, str);
return str;
}
/* 15.2.10.5.12 */
/*
* call-seq:
* str.chop! => str or nil
*
* Processes <i>str</i> as for <code>String#chop</code>, returning <i>str</i>,
* or <code>nil</code> if <i>str</i> is the empty string. See also
* <code>String#chomp!</code>.
*/
static mrb_value
mrb_str_chop_bang(mrb_state *mrb, mrb_value str)
{
struct RString *s = mrb_str_ptr(str);
mrb_str_modify(mrb, s);
if (RSTR_LEN(s) > 0) {
mrb_int len;
len = RSTR_LEN(s) - 1;
if (RSTR_PTR(s)[len] == '\n') {
if (len > 0 &&
RSTR_PTR(s)[len-1] == '\r') {
len--;
}
}
RSTR_SET_LEN(s, len);
RSTR_PTR(s)[len] = '\0';
return str;
}
return mrb_nil_value();
}
/* 15.2.10.5.11 */
/*
* call-seq:
* str.chop => new_str
*
* Returns a new <code>String</code> with the last character removed. If the
* string ends with <code>\r\n</code>, both characters are removed. Applying
* <code>chop</code> to an empty string returns an empty
* string. <code>String#chomp</code> is often a safer alternative, as it leaves
* the string unchanged if it doesn't end in a record separator.
*
* "string\r\n".chop #=> "string"
* "string\n\r".chop #=> "string\n"
* "string\n".chop #=> "string"
* "string".chop #=> "strin"
* "x".chop #=> ""
*/
static mrb_value
mrb_str_chop(mrb_state *mrb, mrb_value self)
{
mrb_value str;
str = mrb_str_dup(mrb, self);
mrb_str_chop_bang(mrb, str);
return str;
}
/* 15.2.10.5.14 */
/*
* call-seq:
* str.downcase! => str or nil
*
* Downcases the contents of <i>str</i>, returning <code>nil</code> if no
* changes were made.
*/
static mrb_value
mrb_str_downcase_bang(mrb_state *mrb, mrb_value str)
{
char *p, *pend;
mrb_bool modify = FALSE;
struct RString *s = mrb_str_ptr(str);
mrb_str_modify(mrb, s);
p = RSTR_PTR(s);
pend = RSTR_PTR(s) + RSTR_LEN(s);
while (p < pend) {
if (ISUPPER(*p)) {
*p = TOLOWER(*p);
modify = TRUE;
}
p++;
}
if (modify) return str;
return mrb_nil_value();
}
/* 15.2.10.5.13 */
/*
* call-seq:
* str.downcase => new_str
*
* Returns a copy of <i>str</i> with all uppercase letters replaced with their
* lowercase counterparts. The operation is locale insensitive---only
* characters ``A'' to ``Z'' are affected.
*
* "hEllO".downcase #=> "hello"
*/
static mrb_value
mrb_str_downcase(mrb_state *mrb, mrb_value self)
{
mrb_value str;
str = mrb_str_dup(mrb, self);
mrb_str_downcase_bang(mrb, str);
return str;
}
/* 15.2.10.5.16 */
/*
* call-seq:
* str.empty? => true or false
*
* Returns <code>true</code> if <i>str</i> has a length of zero.
*
* "hello".empty? #=> false
* "".empty? #=> true
*/
static mrb_value
mrb_str_empty_p(mrb_state *mrb, mrb_value self)
{
struct RString *s = mrb_str_ptr(self);
return mrb_bool_value(RSTR_LEN(s) == 0);
}
/* 15.2.10.5.17 */
/*
* call-seq:
* str.eql?(other) => true or false
*
* Two strings are equal if the have the same length and content.
*/
static mrb_value
mrb_str_eql(mrb_state *mrb, mrb_value self)
{
mrb_value str2;
mrb_bool eql_p;
mrb_get_args(mrb, "o", &str2);
eql_p = (mrb_type(str2) == MRB_TT_STRING) && str_eql(mrb, self, str2);
return mrb_bool_value(eql_p);
}
static mrb_value
mrb_str_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
{
struct RString *orig, *s;
mrb_shared_string *shared;
orig = mrb_str_ptr(str);
if (RSTR_EMBED_P(orig)) {
s = str_new(mrb, orig->as.ary+beg, len);
} else {
str_make_shared(mrb, orig);
shared = orig->as.heap.aux.shared;
s = mrb_obj_alloc_string(mrb);
s->as.heap.ptr = orig->as.heap.ptr + beg;
s->as.heap.len = len;
s->as.heap.aux.shared = shared;
RSTR_SET_SHARED_FLAG(s);
shared->refcnt++;
}
return mrb_obj_value(s);
}
MRB_API mrb_value
mrb_str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
{
if (len < 0) return mrb_nil_value();
if (!RSTRING_LEN(str)) {
len = 0;
}
if (beg > RSTRING_LEN(str)) return mrb_nil_value();
if (beg < 0) {
beg += RSTRING_LEN(str);
if (beg < 0) return mrb_nil_value();
}
if (beg + len > RSTRING_LEN(str))
len = RSTRING_LEN(str) - beg;
if (len <= 0) {
len = 0;
}
return mrb_str_subseq(mrb, str, beg, len);
}
mrb_int
mrb_str_hash(mrb_state *mrb, mrb_value str)
{
/* 1-8-7 */
struct RString *s = mrb_str_ptr(str);
mrb_int len = RSTR_LEN(s);
char *p = RSTR_PTR(s);
mrb_int key = 0;
while (len--) {
key = key*65599 + *p;
p++;
}
return key + (key>>5);
}
/* 15.2.10.5.20 */
/*
* call-seq:
* str.hash => fixnum
*
* Return a hash based on the string's length and content.
*/
static mrb_value
mrb_str_hash_m(mrb_state *mrb, mrb_value self)
{
mrb_int key = mrb_str_hash(mrb, self);
return mrb_fixnum_value(key);
}
/* 15.2.10.5.21 */
/*
* call-seq:
* str.include? other_str => true or false
* str.include? fixnum => true or false
*
* Returns <code>true</code> if <i>str</i> contains the given string or
* character.
*
* "hello".include? "lo" #=> true
* "hello".include? "ol" #=> false
* "hello".include? ?h #=> true
*/
static mrb_value
mrb_str_include(mrb_state *mrb, mrb_value self)
{
mrb_int i;
mrb_value str2;
mrb_bool include_p;
mrb_get_args(mrb, "o", &str2);
if (mrb_fixnum_p(str2)) {
include_p = (memchr(RSTRING_PTR(self), mrb_fixnum(str2), RSTRING_LEN(self)) != NULL);
}
else {
str2 = mrb_str_to_str(mrb, str2);
i = mrb_str_index(mrb, self, str2, 0);
include_p = (i != -1);
}
return mrb_bool_value(include_p);
}
/* 15.2.10.5.22 */
/*
* call-seq:
* str.index(substring [, offset]) => fixnum or nil
* str.index(fixnum [, offset]) => fixnum or nil
* str.index(regexp [, offset]) => fixnum or nil
*
* Returns the index of the first occurrence of the given
* <i>substring</i>,
* character (<i>fixnum</i>), or pattern (<i>regexp</i>) in <i>str</i>.
* Returns
* <code>nil</code> if not found.
* If the second parameter is present, it
* specifies the position in the string to begin the search.
*
* "hello".index('e') #=> 1
* "hello".index('lo') #=> 3
* "hello".index('a') #=> nil
* "hello".index(101) #=> 1(101=0x65='e')
* "hello".index(/[aeiou]/, -3) #=> 4
*/
static mrb_value
mrb_str_index_m(mrb_state *mrb, mrb_value str)
{
mrb_value *argv;
mrb_int argc;
mrb_value sub;
mrb_int pos;
mrb_get_args(mrb, "*", &argv, &argc);
if (argc == 2) {
pos = mrb_fixnum(argv[1]);
sub = argv[0];
}
else {
pos = 0;
if (argc > 0)
sub = argv[0];
else
sub = mrb_nil_value();
}
mrb_regexp_check(mrb, sub);
if (pos < 0) {
pos += RSTRING_LEN(str);
if (pos < 0) {
return mrb_nil_value();
}
}
switch (mrb_type(sub)) {
case MRB_TT_FIXNUM: {
int c = mrb_fixnum(sub);
mrb_int len = RSTRING_LEN(str);
unsigned char *p = (unsigned char*)RSTRING_PTR(str);
for (;pos<len;pos++) {
if (p[pos] == c) return mrb_fixnum_value(pos);
}
return mrb_nil_value();
}
default: {
mrb_value tmp;
tmp = mrb_check_string_type(mrb, sub);
if (mrb_nil_p(tmp)) {
mrb_raisef(mrb, E_TYPE_ERROR, "type mismatch: %S given", sub);
}
sub = tmp;
}
/* fall through */
case MRB_TT_STRING:
pos = mrb_str_index(mrb, str, sub, pos);
break;
}
if (pos == -1) return mrb_nil_value();
return mrb_fixnum_value(pos);
}
#define STR_REPLACE_SHARED_MIN 10
static mrb_value
str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2)
{
long len;
len = RSTR_LEN(s2);
if (RSTR_SHARED_P(s1)) {
str_decref(mrb, s1->as.heap.aux.shared);
}
else if (!RSTR_EMBED_P(s1) && !RSTR_NOFREE_P(s1)) {
mrb_free(mrb, s1->as.heap.ptr);
}
RSTR_UNSET_NOFREE_FLAG(s1);
if (RSTR_SHARED_P(s2)) {
L_SHARE:
RSTR_UNSET_EMBED_FLAG(s1);
s1->as.heap.ptr = s2->as.heap.ptr;
s1->as.heap.len = len;
s1->as.heap.aux.shared = s2->as.heap.aux.shared;
RSTR_SET_SHARED_FLAG(s1);
s1->as.heap.aux.shared->refcnt++;
}
else {
if (len <= RSTRING_EMBED_LEN_MAX) {
RSTR_UNSET_SHARED_FLAG(s1);
RSTR_SET_EMBED_FLAG(s1);
memcpy(s1->as.ary, RSTR_PTR(s2), len);
RSTR_SET_EMBED_LEN(s1, len);
}
else {
str_make_shared(mrb, s2);
goto L_SHARE;
}
}
return mrb_obj_value(s1);
}
/* 15.2.10.5.24 */
/* 15.2.10.5.28 */
/*
* call-seq:
* str.replace(other_str) => str
*
* s = "hello" #=> "hello"
* s.replace "world" #=> "world"
*/
static mrb_value
mrb_str_replace(mrb_state *mrb, mrb_value str)
{
mrb_value str2;
mrb_get_args(mrb, "S", &str2);
return str_replace(mrb, mrb_str_ptr(str), mrb_str_ptr(str2));
}
/* 15.2.10.5.23 */
/*
* call-seq:
* String.new(str="") => new_str
*
* Returns a new string object containing a copy of <i>str</i>.
*/
static mrb_value
mrb_str_init(mrb_state *mrb, mrb_value self)
{
mrb_value str2;
if (mrb_get_args(mrb, "|S", &str2) == 1) {
str_replace(mrb, mrb_str_ptr(self), mrb_str_ptr(str2));
}
return self;
}
/* 15.2.10.5.25 */
/* 15.2.10.5.41 */
/*
* call-seq:
* str.intern => symbol
* str.to_sym => symbol
*
* Returns the <code>Symbol</code> corresponding to <i>str</i>, creating the
* symbol if it did not previously exist. See <code>Symbol#id2name</code>.
*
* "Koala".intern #=> :Koala
* s = 'cat'.to_sym #=> :cat
* s == :cat #=> true
* s = '@cat'.to_sym #=> :@cat
* s == :@cat #=> true
*
* This can also be used to create symbols that cannot be represented using the
* <code>:xxx</code> notation.
*
* 'cat and dog'.to_sym #=> :"cat and dog"
*/
MRB_API mrb_value
mrb_str_intern(mrb_state *mrb, mrb_value self)
{
return mrb_symbol_value(mrb_intern_str(mrb, self));
}
/* ---------------------------------- */
MRB_API mrb_value
mrb_obj_as_string(mrb_state *mrb, mrb_value obj)
{
mrb_value str;
if (mrb_string_p(obj)) {
return obj;
}
str = mrb_funcall(mrb, obj, "to_s", 0);
if (!mrb_string_p(str))
return mrb_any_to_s(mrb, obj);
return str;
}
MRB_API mrb_value
mrb_ptr_to_str(mrb_state *mrb, void *p)
{
struct RString *p_str;
char *p1;
char *p2;
uintptr_t n = (uintptr_t)p;
p_str = str_new(mrb, NULL, 2 + sizeof(uintptr_t) * CHAR_BIT / 4);
p1 = RSTR_PTR(p_str);
*p1++ = '0';
*p1++ = 'x';
p2 = p1;
do {
*p2++ = mrb_digitmap[n % 16];
n /= 16;
} while (n > 0);
*p2 = '\0';
RSTR_SET_LEN(p_str, (mrb_int)(p2 - RSTR_PTR(p_str)));
while (p1 < p2) {
const char c = *p1;
*p1++ = *--p2;
*p2 = c;
}
return mrb_obj_value(p_str);
}
MRB_API mrb_value
mrb_string_type(mrb_state *mrb, mrb_value str)
{
return mrb_convert_type(mrb, str, MRB_TT_STRING, "String", "to_str");
}
MRB_API mrb_value
mrb_check_string_type(mrb_state *mrb, mrb_value str)
{
return mrb_check_convert_type(mrb, str, MRB_TT_STRING, "String", "to_str");
}
/* ---------------------------------- */
/* 15.2.10.5.29 */
/*
* call-seq:
* str.reverse => new_str
*
* Returns a new string with the characters from <i>str</i> in reverse order.
*
* "stressed".reverse #=> "desserts"
*/
static mrb_value
mrb_str_reverse(mrb_state *mrb, mrb_value str)
{
struct RString *s2;
char *s, *e, *p;
if (RSTRING_LEN(str) <= 1) return mrb_str_dup(mrb, str);
s2 = str_new(mrb, 0, RSTRING_LEN(str));
str_with_class(mrb, s2, str);
s = RSTRING_PTR(str); e = RSTRING_END(str) - 1;
p = RSTR_PTR(s2);
while (e >= s) {
*p++ = *e--;
}
return mrb_obj_value(s2);
}
/* 15.2.10.5.30 */
/*
* call-seq:
* str.reverse! => str
*
* Reverses <i>str</i> in place.
*/
static mrb_value
mrb_str_reverse_bang(mrb_state *mrb, mrb_value str)
{
struct RString *s = mrb_str_ptr(str);
char *p, *e;
char c;
mrb_str_modify(mrb, s);
if (RSTR_LEN(s) > 1) {
p = RSTR_PTR(s);
e = p + RSTR_LEN(s) - 1;
while (p < e) {
c = *p;
*p++ = *e;
*e-- = c;
}
}
return str;
}
/*
* call-seq:
* str.rindex(substring [, fixnum]) => fixnum or nil
* str.rindex(fixnum [, fixnum]) => fixnum or nil
* str.rindex(regexp [, fixnum]) => fixnum or nil
*
* Returns the index of the last occurrence of the given <i>substring</i>,
* character (<i>fixnum</i>), or pattern (<i>regexp</i>) in <i>str</i>. Returns
* <code>nil</code> if not found. If the second parameter is present, it
* specifies the position in the string to end the search---characters beyond
* this point will not be considered.
*
* "hello".rindex('e') #=> 1
* "hello".rindex('l') #=> 3
* "hello".rindex('a') #=> nil
* "hello".rindex(101) #=> 1
* "hello".rindex(/[aeiou]/, -2) #=> 1
*/
static mrb_int
mrb_str_rindex(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int pos)
{
char *s, *sbeg, *t;
struct RString *ps = mrb_str_ptr(str);
mrb_int len = RSTRING_LEN(sub);
/* substring longer than string */
if (RSTR_LEN(ps) < len) return -1;
if (RSTR_LEN(ps) - pos < len) {
pos = RSTR_LEN(ps) - len;
}
sbeg = RSTR_PTR(ps);
s = RSTR_PTR(ps) + pos;
t = RSTRING_PTR(sub);
if (len) {
while (sbeg <= s) {
if (memcmp(s, t, len) == 0) {
return s - RSTR_PTR(ps);
}
s--;
}
return -1;
}
else {
return pos;
}
}
/* 15.2.10.5.31 */
/*
* call-seq:
* str.rindex(substring [, fixnum]) => fixnum or nil
* str.rindex(fixnum [, fixnum]) => fixnum or nil
* str.rindex(regexp [, fixnum]) => fixnum or nil
*
* Returns the index of the last occurrence of the given <i>substring</i>,
* character (<i>fixnum</i>), or pattern (<i>regexp</i>) in <i>str</i>. Returns
* <code>nil</code> if not found. If the second parameter is present, it
* specifies the position in the string to end the search---characters beyond
* this point will not be considered.
*
* "hello".rindex('e') #=> 1
* "hello".rindex('l') #=> 3
* "hello".rindex('a') #=> nil
* "hello".rindex(101) #=> 1
* "hello".rindex(/[aeiou]/, -2) #=> 1
*/
static mrb_value
mrb_str_rindex_m(mrb_state *mrb, mrb_value str)
{
mrb_value *argv;
mrb_int argc;
mrb_value sub;
mrb_value vpos;
mrb_int pos, len = RSTRING_LEN(str);
mrb_get_args(mrb, "*", &argv, &argc);
if (argc == 2) {
sub = argv[0];
vpos = argv[1];
pos = mrb_fixnum(vpos);
if (pos < 0) {
pos += len;
if (pos < 0) {
mrb_regexp_check(mrb, sub);
return mrb_nil_value();
}
}
if (pos > len) pos = len;
}
else {
pos = len;
if (argc > 0)
sub = argv[0];
else
sub = mrb_nil_value();
}
mrb_regexp_check(mrb, sub);
switch (mrb_type(sub)) {
case MRB_TT_FIXNUM: {
int c = mrb_fixnum(sub);
unsigned char *p = (unsigned char*)RSTRING_PTR(str);
for (pos=len-1;pos>=0;pos--) {
if (p[pos] == c) return mrb_fixnum_value(pos);
}
return mrb_nil_value();
}
default: {
mrb_value tmp;
tmp = mrb_check_string_type(mrb, sub);
if (mrb_nil_p(tmp)) {
mrb_raisef(mrb, E_TYPE_ERROR, "type mismatch: %S given", sub);
}
sub = tmp;
}
/* fall through */
case MRB_TT_STRING:
pos = mrb_str_rindex(mrb, str, sub, pos);
if (pos >= 0) return mrb_fixnum_value(pos);
break;
} /* end of switch (TYPE(sub)) */
return mrb_nil_value();
}
/* 15.2.10.5.35 */
/*
* call-seq:
* str.split(pattern=$;, [limit]) => anArray
*
* Divides <i>str</i> into substrings based on a delimiter, returning an array
* of these substrings.
*
* If <i>pattern</i> is a <code>String</code>, then its contents are used as
* the delimiter when splitting <i>str</i>. If <i>pattern</i> is a single
* space, <i>str</i> is split on whitespace, with leading whitespace and runs
* of contiguous whitespace characters ignored.
*
* If <i>pattern</i> is a <code>Regexp</code>, <i>str</i> is divided where the
* pattern matches. Whenever the pattern matches a zero-length string,
* <i>str</i> is split into individual characters.
*
* If <i>pattern</i> is omitted, the value of <code>$;</code> is used. If
* <code>$;</code> is <code>nil</code> (which is the default), <i>str</i> is
* split on whitespace as if ` ' were specified.
*
* If the <i>limit</i> parameter is omitted, trailing null fields are
* suppressed. If <i>limit</i> is a positive number, at most that number of
* fields will be returned (if <i>limit</i> is <code>1</code>, the entire
* string is returned as the only entry in an array). If negative, there is no
* limit to the number of fields returned, and trailing null fields are not
* suppressed.
*
* " now's the time".split #=> ["now's", "the", "time"]
* " now's the time".split(' ') #=> ["now's", "the", "time"]
* " now's the time".split(/ /) #=> ["", "now's", "", "the", "time"]
* "1, 2.34,56, 7".split(%r{,\s*}) #=> ["1", "2.34", "56", "7"]
* "hello".split(//) #=> ["h", "e", "l", "l", "o"]
* "hello".split(//, 3) #=> ["h", "e", "llo"]
* "hi mom".split(%r{\s*}) #=> ["h", "i", "m", "o", "m"]
*
* "mellow yellow".split("ello") #=> ["m", "w y", "w"]
* "1,2,,3,4,,".split(',') #=> ["1", "2", "", "3", "4"]
* "1,2,,3,4,,".split(',', 4) #=> ["1", "2", "", "3,4,,"]
* "1,2,,3,4,,".split(',', -4) #=> ["1", "2", "", "3", "4", "", ""]
*/
static mrb_value
mrb_str_split_m(mrb_state *mrb, mrb_value str)
{
int argc;
mrb_value spat = mrb_nil_value();
enum {awk, string, regexp} split_type = string;
long i = 0, lim_p;
mrb_int beg;
mrb_int end;
mrb_int lim = 0;
mrb_value result, tmp;
argc = mrb_get_args(mrb, "|oi", &spat, &lim);
lim_p = (lim > 0 && argc == 2);
if (argc == 2) {
if (lim == 1) {
if (RSTRING_LEN(str) == 0)
return mrb_ary_new_capa(mrb, 0);
return mrb_ary_new_from_values(mrb, 1, &str);
}
i = 1;
}
if (argc == 0 || mrb_nil_p(spat)) {
split_type = awk;
}
else {
if (mrb_string_p(spat)) {
split_type = string;
if (RSTRING_LEN(spat) == 1 && RSTRING_PTR(spat)[0] == ' ') {
split_type = awk;
}
}
else {
mrb_noregexp(mrb, str);
}
}
result = mrb_ary_new(mrb);
beg = 0;
if (split_type == awk) {
char *ptr = RSTRING_PTR(str);
char *eptr = RSTRING_END(str);
char *bptr = ptr;
mrb_bool skip = TRUE;
unsigned int c;
end = beg;
while (ptr < eptr) {
int ai = mrb_gc_arena_save(mrb);
c = (unsigned char)*ptr++;
if (skip) {
if (ISSPACE(c)) {
beg = ptr - bptr;
}
else {
end = ptr - bptr;
skip = FALSE;
if (lim_p && lim <= i) break;
}
}
else if (ISSPACE(c)) {
mrb_ary_push(mrb, result, mrb_str_subseq(mrb, str, beg, end-beg));
mrb_gc_arena_restore(mrb, ai);
skip = TRUE;
beg = ptr - bptr;
if (lim_p) ++i;
}
else {
end = ptr - bptr;
}
}
}
else if (split_type == string) {
char *ptr = RSTRING_PTR(str); /* s->as.ary */
char *temp = ptr;
char *eptr = RSTRING_END(str);
mrb_int slen = RSTRING_LEN(spat);
if (slen == 0) {
int ai = mrb_gc_arena_save(mrb);
while (ptr < eptr) {
mrb_ary_push(mrb, result, mrb_str_subseq(mrb, str, ptr-temp, 1));
mrb_gc_arena_restore(mrb, ai);
ptr++;
if (lim_p && lim <= ++i) break;
}
}
else {
char *sptr = RSTRING_PTR(spat);
int ai = mrb_gc_arena_save(mrb);
while (ptr < eptr &&
(end = mrb_memsearch(sptr, slen, ptr, eptr - ptr)) >= 0) {
mrb_ary_push(mrb, result, mrb_str_subseq(mrb, str, ptr - temp, end));
mrb_gc_arena_restore(mrb, ai);
ptr += end + slen;
if (lim_p && lim <= ++i) break;
}
}
beg = ptr - temp;
}
else {
mrb_noregexp(mrb, str);
}
if (RSTRING_LEN(str) > 0 && (lim_p || RSTRING_LEN(str) > beg || lim < 0)) {
if (RSTRING_LEN(str) == beg) {
tmp = mrb_str_new_empty(mrb, str);
}
else {
tmp = mrb_str_subseq(mrb, str, beg, RSTRING_LEN(str)-beg);
}
mrb_ary_push(mrb, result, tmp);
}
if (!lim_p && lim == 0) {
mrb_int len;
while ((len = RARRAY_LEN(result)) > 0 &&
(tmp = RARRAY_PTR(result)[len-1], RSTRING_LEN(tmp) == 0))
mrb_ary_pop(mrb, result);
}
return result;
}
MRB_API mrb_value
mrb_cstr_to_inum(mrb_state *mrb, const char *str, int base, int badcheck)
{
const char *p;
char sign = 1;
int c, uscore;
unsigned long n = 0;
mrb_int val;
#define conv_digit(c) \
(ISDIGIT(c) ? ((c) - '0') : \
ISLOWER(c) ? ((c) - 'a' + 10) : \
ISUPPER(c) ? ((c) - 'A' + 10) : \
-1)
if (!str) {
if (badcheck) goto bad;
return mrb_fixnum_value(0);
}
while (ISSPACE(*str)) str++;
if (str[0] == '+') {
str++;
}
else if (str[0] == '-') {
str++;
sign = 0;
}
if (str[0] == '+' || str[0] == '-') {
if (badcheck) goto bad;
return mrb_fixnum_value(0);
}
if (base <= 0) {
if (str[0] == '0') {
switch (str[1]) {
case 'x': case 'X':
base = 16;
break;
case 'b': case 'B':
base = 2;
break;
case 'o': case 'O':
base = 8;
break;
case 'd': case 'D':
base = 10;
break;
default:
base = 8;
}
}
else if (base < -1) {
base = -base;
}
else {
base = 10;
}
}
switch (base) {
case 2:
if (str[0] == '0' && (str[1] == 'b'||str[1] == 'B')) {
str += 2;
}
break;
case 3:
break;
case 8:
if (str[0] == '0' && (str[1] == 'o'||str[1] == 'O')) {
str += 2;
}
case 4: case 5: case 6: case 7:
break;
case 10:
if (str[0] == '0' && (str[1] == 'd'||str[1] == 'D')) {
str += 2;
}
case 9: case 11: case 12: case 13: case 14: case 15:
break;
case 16:
if (str[0] == '0' && (str[1] == 'x'||str[1] == 'X')) {
str += 2;
}
break;
default:
if (base < 2 || 36 < base) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "illegal radix %S", mrb_fixnum_value(base));
}
break;
} /* end of switch (base) { */
if (*str == '0') { /* squeeze preceeding 0s */
uscore = 0;
while ((c = *++str) == '0' || c == '_') {
if (c == '_') {
if (++uscore >= 2)
break;
}
else
uscore = 0;
}
if (!(c = *str) || ISSPACE(c)) --str;
}
c = *str;
c = conv_digit(c);
if (c < 0 || c >= base) {
if (badcheck) goto bad;
return mrb_fixnum_value(0);
}
uscore = 0;
for (p=str;*p;p++) {
if (*p == '_') {
if (uscore == 0) {
uscore++;
continue;
}
if (badcheck) goto bad;
break;
}
uscore = 0;
c = conv_digit(*p);
if (c < 0 || c >= base) {
if (badcheck) goto bad;
break;
}
n *= base;
n += c;
}
if (n > MRB_INT_MAX) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "string (%S) too big for integer", mrb_str_new_cstr(mrb, str));
}
val = n;
if (badcheck) {
if (p == str) goto bad; /* no number */
while (*p && ISSPACE(*p)) p++;
if (*p) goto bad; /* trailing garbage */
}
return mrb_fixnum_value(sign ? val : -val);
bad:
mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for number(%S)", mrb_str_new_cstr(mrb, str));
/* not reached */
return mrb_fixnum_value(0);
}
MRB_API const char*
mrb_string_value_cstr(mrb_state *mrb, mrb_value *ptr)
{
struct RString *ps = mrb_str_ptr(*ptr);
mrb_int len = mrb_str_strlen(mrb, ps);
char *p = RSTR_PTR(ps);
if (!p || p[len] != '\0') {
mrb_str_modify(mrb, ps);
return RSTR_PTR(ps);
}
return p;
}
MRB_API mrb_value
mrb_str_to_inum(mrb_state *mrb, mrb_value str, mrb_int base, mrb_bool badcheck)
{
const char *s;
mrb_int len;
str = mrb_str_to_str(mrb, str);
if (badcheck) {
s = mrb_string_value_cstr(mrb, &str);
}
else {
s = RSTRING_PTR(str);
}
if (s) {
len = RSTRING_LEN(str);
if (s[len]) { /* no sentinel somehow */
struct RString *temp_str = str_new(mrb, s, len);
s = RSTR_PTR(temp_str);
}
}
return mrb_cstr_to_inum(mrb, s, base, badcheck);
}
/* 15.2.10.5.38 */
/*
* call-seq:
* str.to_i(base=10) => integer
*
* Returns the result of interpreting leading characters in <i>str</i> as an
* integer base <i>base</i> (between 2 and 36). Extraneous characters past the
* end of a valid number are ignored. If there is not a valid number at the
* start of <i>str</i>, <code>0</code> is returned. This method never raises an
* exception.
*
* "12345".to_i #=> 12345
* "99 red balloons".to_i #=> 99
* "0a".to_i #=> 0
* "0a".to_i(16) #=> 10
* "hello".to_i #=> 0
* "1100101".to_i(2) #=> 101
* "1100101".to_i(8) #=> 294977
* "1100101".to_i(10) #=> 1100101
* "1100101".to_i(16) #=> 17826049
*/
static mrb_value
mrb_str_to_i(mrb_state *mrb, mrb_value self)
{
mrb_int base = 10;
mrb_get_args(mrb, "|i", &base);
if (base < 0) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "illegal radix %S", mrb_fixnum_value(base));
}
return mrb_str_to_inum(mrb, self, base, FALSE);
}
MRB_API double
mrb_cstr_to_dbl(mrb_state *mrb, const char * p, mrb_bool badcheck)
{
char *end;
double d;
enum {max_width = 20};
if (!p) return 0.0;
while (ISSPACE(*p)) p++;
if (!badcheck && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) {
return 0.0;
}
d = strtod(p, &end);
if (p == end) {
if (badcheck) {
bad:
mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for float(%S)", mrb_str_new_cstr(mrb, p));
/* not reached */
}
return d;
}
if (*end) {
char buf[DBL_DIG * 4 + 10];
char *n = buf;
char *e = buf + sizeof(buf) - 1;
char prev = 0;
while (p < end && n < e) prev = *n++ = *p++;
while (*p) {
if (*p == '_') {
/* remove underscores between digits */
if (badcheck) {
if (n == buf || !ISDIGIT(prev)) goto bad;
++p;
if (!ISDIGIT(*p)) goto bad;
}
else {
while (*++p == '_');
continue;
}
}
prev = *p++;
if (n < e) *n++ = prev;
}
*n = '\0';
p = buf;
if (!badcheck && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) {
return 0.0;
}
d = strtod(p, &end);
if (badcheck) {
if (!end || p == end) goto bad;
while (*end && ISSPACE(*end)) end++;
if (*end) goto bad;
}
}
return d;
}
MRB_API double
mrb_str_to_dbl(mrb_state *mrb, mrb_value str, mrb_bool badcheck)
{
char *s;
mrb_int len;
str = mrb_str_to_str(mrb, str);
s = RSTRING_PTR(str);
len = RSTRING_LEN(str);
if (s) {
if (badcheck && memchr(s, '\0', len)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "string for Float contains null byte");
}
if (s[len]) { /* no sentinel somehow */
struct RString *temp_str = str_new(mrb, s, len);
s = RSTR_PTR(temp_str);
}
}
return mrb_cstr_to_dbl(mrb, s, badcheck);
}
/* 15.2.10.5.39 */
/*
* call-seq:
* str.to_f => float
*
* Returns the result of interpreting leading characters in <i>str</i> as a
* floating point number. Extraneous characters past the end of a valid number
* are ignored. If there is not a valid number at the start of <i>str</i>,
* <code>0.0</code> is returned. This method never raises an exception.
*
* "123.45e1".to_f #=> 1234.5
* "45.67 degrees".to_f #=> 45.67
* "thx1138".to_f #=> 0.0
*/
static mrb_value
mrb_str_to_f(mrb_state *mrb, mrb_value self)
{
return mrb_float_value(mrb, mrb_str_to_dbl(mrb, self, FALSE));
}
/* 15.2.10.5.40 */
/*
* call-seq:
* str.to_s => str
* str.to_str => str
*
* Returns the receiver.
*/
static mrb_value
mrb_str_to_s(mrb_state *mrb, mrb_value self)
{
if (mrb_obj_class(mrb, self) != mrb->string_class) {
return mrb_str_dup(mrb, self);
}
return self;
}
/* 15.2.10.5.43 */
/*
* call-seq:
* str.upcase! => str or nil
*
* Upcases the contents of <i>str</i>, returning <code>nil</code> if no changes
* were made.
*/
static mrb_value
mrb_str_upcase_bang(mrb_state *mrb, mrb_value str)
{
struct RString *s = mrb_str_ptr(str);
char *p, *pend;
mrb_bool modify = FALSE;
mrb_str_modify(mrb, s);
p = RSTRING_PTR(str);
pend = RSTRING_END(str);
while (p < pend) {
if (ISLOWER(*p)) {
*p = TOUPPER(*p);
modify = TRUE;
}
p++;
}
if (modify) return str;
return mrb_nil_value();
}
/* 15.2.10.5.42 */
/*
* call-seq:
* str.upcase => new_str
*
* Returns a copy of <i>str</i> with all lowercase letters replaced with their
* uppercase counterparts. The operation is locale insensitive---only
* characters ``a'' to ``z'' are affected.
*
* "hEllO".upcase #=> "HELLO"
*/
static mrb_value
mrb_str_upcase(mrb_state *mrb, mrb_value self)
{
mrb_value str;
str = mrb_str_dup(mrb, self);
mrb_str_upcase_bang(mrb, str);
return str;
}
#define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
/*
* call-seq:
* str.dump -> new_str
*
* Produces a version of <i>str</i> with all nonprinting characters replaced by
* <code>\nnn</code> notation and all special characters escaped.
*/
mrb_value
mrb_str_dump(mrb_state *mrb, mrb_value str)
{
mrb_int len;
const char *p, *pend;
char *q;
struct RString *result;
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 {
len += 4; /* \NNN */
}
break;
}
}
result = str_new(mrb, 0, len);
str_with_class(mrb, result, str);
p = RSTRING_PTR(str); pend = p + RSTRING_LEN(str);
q = RSTR_PTR(result);
*q++ = '"';
while (p < pend) {
unsigned char c = *p++;
switch (c) {
case '"':
case '\\':
*q++ = '\\';
*q++ = c;
break;
case '\n':
*q++ = '\\';
*q++ = 'n';
break;
case '\r':
*q++ = '\\';
*q++ = 'r';
break;
case '\t':
*q++ = '\\';
*q++ = 't';
break;
case '\f':
*q++ = '\\';
*q++ = 'f';
break;
case '\013':
*q++ = '\\';
*q++ = 'v';
break;
case '\010':
*q++ = '\\';
*q++ = 'b';
break;
case '\007':
*q++ = '\\';
*q++ = 'a';
break;
case '\033':
*q++ = '\\';
*q++ = 'e';
break;
case '#':
if (IS_EVSTR(p, pend)) *q++ = '\\';
*q++ = '#';
break;
default:
if (ISPRINT(c)) {
*q++ = c;
}
else {
*q++ = '\\';
q[2] = '0' + c % 8; c /= 8;
q[1] = '0' + c % 8; c /= 8;
q[0] = '0' + c % 8;
q += 3;
}
}
}
*q = '"';
return mrb_obj_value(result);
}
MRB_API mrb_value
mrb_str_cat(mrb_state *mrb, mrb_value str, const char *ptr, size_t len)
{
str_buf_cat(mrb, mrb_str_ptr(str), ptr, len);
return str;
}
MRB_API mrb_value
mrb_str_cat_cstr(mrb_state *mrb, mrb_value str, const char *ptr)
{
return mrb_str_cat(mrb, str, ptr, strlen(ptr));
}
MRB_API mrb_value
mrb_str_cat_str(mrb_state *mrb, mrb_value str, mrb_value str2)
{
return mrb_str_cat(mrb, str, RSTRING_PTR(str2), RSTRING_LEN(str2));
}
MRB_API mrb_value
mrb_str_append(mrb_state *mrb, mrb_value str, mrb_value str2)
{
str2 = mrb_str_to_str(mrb, str2);
return mrb_str_cat_str(mrb, str, str2);
}
#define CHAR_ESC_LEN 13 /* sizeof(\x{ hex of 32bit unsigned int } \0) */
/*
* call-seq:
* str.inspect -> string
*
* Returns a printable version of _str_, surrounded by quote marks,
* with special characters escaped.
*
* str = "hello"
* str[3] = "\b"
* str.inspect #=> "\"hel\\bo\""
*/
mrb_value
mrb_str_inspect(mrb_state *mrb, mrb_value str)
{
const char *p, *pend;
char buf[CHAR_ESC_LEN + 1];
mrb_value result = mrb_str_new_lit(mrb, "\"");
p = RSTRING_PTR(str); pend = RSTRING_END(str);
for (;p < pend; p++) {
unsigned char c, cc;
c = *p;
if (c == '"'|| c == '\\' || (c == '#' && IS_EVSTR(p, pend))) {
buf[0] = '\\'; buf[1] = c;
mrb_str_cat(mrb, result, buf, 2);
continue;
}
if (ISPRINT(c)) {
buf[0] = c;
mrb_str_cat(mrb, result, buf, 1);
continue;
}
switch (c) {
case '\n': cc = 'n'; break;
case '\r': cc = 'r'; break;
case '\t': cc = 't'; break;
case '\f': cc = 'f'; break;
case '\013': cc = 'v'; break;
case '\010': cc = 'b'; break;
case '\007': cc = 'a'; break;
case 033: cc = 'e'; break;
default: cc = 0; break;
}
if (cc) {
buf[0] = '\\';
buf[1] = (char)cc;
mrb_str_cat(mrb, result, buf, 2);
continue;
}
else {
buf[0] = '\\';
buf[3] = '0' + c % 8; c /= 8;
buf[2] = '0' + c % 8; c /= 8;
buf[1] = '0' + c % 8;
mrb_str_cat(mrb, result, buf, 4);
continue;
}
}
mrb_str_cat_lit(mrb, result, "\"");
return result;
}
/*
* call-seq:
* str.bytes -> array of fixnums
*
* Returns an array of bytes in _str_.
*
* str = "hello"
* str.bytes #=> [104, 101, 108, 108, 111]
*/
static mrb_value
mrb_str_bytes(mrb_state *mrb, mrb_value str)
{
struct RString *s = mrb_str_ptr(str);
mrb_value a = mrb_ary_new_capa(mrb, RSTR_LEN(s));
unsigned char *p = (unsigned char *)(RSTR_PTR(s)), *pend = p + RSTR_LEN(s);
while (p < pend) {
mrb_ary_push(mrb, a, mrb_fixnum_value(p[0]));
p++;
}
return a;
}
/* ---------------------------*/
void
mrb_init_string(mrb_state *mrb)
{
struct RClass *s;
mrb_static_assert(RSTRING_EMBED_LEN_MAX < (1 << 5), "pointer size too big for embedded string");
s = mrb->string_class = mrb_define_class(mrb, "String", mrb->object_class); /* 15.2.10 */
MRB_SET_INSTANCE_TT(s, MRB_TT_STRING);
mrb_define_method(mrb, s, "bytesize", mrb_str_size, MRB_ARGS_NONE());
mrb_define_method(mrb, s, "<=>", mrb_str_cmp_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.1 */
mrb_define_method(mrb, s, "==", mrb_str_equal_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.2 */
mrb_define_method(mrb, s, "+", mrb_str_plus_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.4 */
mrb_define_method(mrb, s, "*", mrb_str_times, MRB_ARGS_REQ(1)); /* 15.2.10.5.5 */
mrb_define_method(mrb, s, "[]", mrb_str_aref_m, MRB_ARGS_ANY()); /* 15.2.10.5.6 */
mrb_define_method(mrb, s, "capitalize", mrb_str_capitalize, MRB_ARGS_NONE()); /* 15.2.10.5.7 */
mrb_define_method(mrb, s, "capitalize!", mrb_str_capitalize_bang, MRB_ARGS_NONE()); /* 15.2.10.5.8 */
mrb_define_method(mrb, s, "chomp", mrb_str_chomp, MRB_ARGS_ANY()); /* 15.2.10.5.9 */
mrb_define_method(mrb, s, "chomp!", mrb_str_chomp_bang, MRB_ARGS_ANY()); /* 15.2.10.5.10 */
mrb_define_method(mrb, s, "chop", mrb_str_chop, MRB_ARGS_REQ(1)); /* 15.2.10.5.11 */
mrb_define_method(mrb, s, "chop!", mrb_str_chop_bang, MRB_ARGS_REQ(1)); /* 15.2.10.5.12 */
mrb_define_method(mrb, s, "downcase", mrb_str_downcase, MRB_ARGS_NONE()); /* 15.2.10.5.13 */
mrb_define_method(mrb, s, "downcase!", mrb_str_downcase_bang, MRB_ARGS_NONE()); /* 15.2.10.5.14 */
mrb_define_method(mrb, s, "empty?", mrb_str_empty_p, MRB_ARGS_NONE()); /* 15.2.10.5.16 */
mrb_define_method(mrb, s, "eql?", mrb_str_eql, MRB_ARGS_REQ(1)); /* 15.2.10.5.17 */
mrb_define_method(mrb, s, "hash", mrb_str_hash_m, MRB_ARGS_NONE()); /* 15.2.10.5.20 */
mrb_define_method(mrb, s, "include?", mrb_str_include, MRB_ARGS_REQ(1)); /* 15.2.10.5.21 */
mrb_define_method(mrb, s, "index", mrb_str_index_m, MRB_ARGS_ANY()); /* 15.2.10.5.22 */
mrb_define_method(mrb, s, "initialize", mrb_str_init, MRB_ARGS_REQ(1)); /* 15.2.10.5.23 */
mrb_define_method(mrb, s, "initialize_copy", mrb_str_replace, MRB_ARGS_REQ(1)); /* 15.2.10.5.24 */
mrb_define_method(mrb, s, "intern", mrb_str_intern, MRB_ARGS_NONE()); /* 15.2.10.5.25 */
mrb_define_method(mrb, s, "length", mrb_str_size, MRB_ARGS_NONE()); /* 15.2.10.5.26 */
mrb_define_method(mrb, s, "replace", mrb_str_replace, MRB_ARGS_REQ(1)); /* 15.2.10.5.28 */
mrb_define_method(mrb, s, "reverse", mrb_str_reverse, MRB_ARGS_NONE()); /* 15.2.10.5.29 */
mrb_define_method(mrb, s, "reverse!", mrb_str_reverse_bang, MRB_ARGS_NONE()); /* 15.2.10.5.30 */
mrb_define_method(mrb, s, "rindex", mrb_str_rindex_m, MRB_ARGS_ANY()); /* 15.2.10.5.31 */
mrb_define_method(mrb, s, "size", mrb_str_size, MRB_ARGS_NONE()); /* 15.2.10.5.33 */
mrb_define_method(mrb, s, "slice", mrb_str_aref_m, MRB_ARGS_ANY()); /* 15.2.10.5.34 */
mrb_define_method(mrb, s, "split", mrb_str_split_m, MRB_ARGS_ANY()); /* 15.2.10.5.35 */
mrb_define_method(mrb, s, "to_f", mrb_str_to_f, MRB_ARGS_NONE()); /* 15.2.10.5.38 */
mrb_define_method(mrb, s, "to_i", mrb_str_to_i, MRB_ARGS_ANY()); /* 15.2.10.5.39 */
mrb_define_method(mrb, s, "to_s", mrb_str_to_s, MRB_ARGS_NONE()); /* 15.2.10.5.40 */
mrb_define_method(mrb, s, "to_str", mrb_str_to_s, MRB_ARGS_NONE());
mrb_define_method(mrb, s, "to_sym", mrb_str_intern, MRB_ARGS_NONE()); /* 15.2.10.5.41 */
mrb_define_method(mrb, s, "upcase", mrb_str_upcase, MRB_ARGS_NONE()); /* 15.2.10.5.42 */
mrb_define_method(mrb, s, "upcase!", mrb_str_upcase_bang, MRB_ARGS_NONE()); /* 15.2.10.5.43 */
mrb_define_method(mrb, s, "inspect", mrb_str_inspect, MRB_ARGS_NONE()); /* 15.2.10.5.46(x) */
mrb_define_method(mrb, s, "bytes", mrb_str_bytes, MRB_ARGS_NONE());
}