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ruby--ruby/ext/iconv/iconv.c

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/* -*- mode:c; c-file-style:"ruby" -*- */
/**********************************************************************
iconv.c -
$Author$
created at: Wed Dec 1 20:28:09 JST 1999
All the files in this distribution are covered under the Ruby's
license (see the file COPYING).
Documentation by Yukihiro Matsumoto and Gavin Sinclair.
**********************************************************************/
#include "ruby/ruby.h"
#include <errno.h>
#include <iconv.h>
#include <assert.h>
#include "ruby/st.h"
#include "ruby/encoding.h"
/*
* Document-class: Iconv
*
* == Summary
*
* Ruby extension for charset conversion.
*
* == Abstract
*
* Iconv is a wrapper class for the UNIX 95 <tt>iconv()</tt> function family,
* which translates string between various encoding systems.
*
* See Open Group's on-line documents for more details.
* * <tt>iconv.h</tt>: http://www.opengroup.org/onlinepubs/007908799/xsh/iconv.h.html
* * <tt>iconv_open()</tt>: http://www.opengroup.org/onlinepubs/007908799/xsh/iconv_open.html
* * <tt>iconv()</tt>: http://www.opengroup.org/onlinepubs/007908799/xsh/iconv.html
* * <tt>iconv_close()</tt>: http://www.opengroup.org/onlinepubs/007908799/xsh/iconv_close.html
*
* Which coding systems are available is platform-dependent.
*
* == Examples
*
* 1. Simple conversion between two charsets.
*
* converted_text = Iconv.conv('iso-8859-15', 'utf-8', text)
*
* 2. Instantiate a new Iconv and use method Iconv#iconv.
*
* cd = Iconv.new(to, from)
* begin
* input.each { |s| output << cd.iconv(s) }
* output << cd.iconv(nil) # Don't forget this!
* ensure
* cd.close
* end
*
* 3. Invoke Iconv.open with a block.
*
* Iconv.open(to, from) do |cd|
* input.each { |s| output << cd.iconv(s) }
* output << cd.iconv(nil)
* end
*
* 4. Shorthand for (3).
*
* Iconv.iconv(to, from, *input.to_a)
*
* == Attentions
*
* Even if some extentions of implementation dependent are useful,
* DON'T USE those extentions in libraries and scripts to widely distribute.
* If you want to use those feature, use String#encode.
*/
/* Invalid value for iconv_t is -1 but 0 for VALUE, I hope VALUE is
big enough to keep iconv_t */
#define VALUE2ICONV(v) ((iconv_t)((VALUE)(v) ^ -1))
#define ICONV2VALUE(c) ((VALUE)(c) ^ -1)
struct iconv_env_t
{
iconv_t cd;
int argc;
VALUE *argv;
VALUE ret;
int toidx;
VALUE (*append)_((VALUE, VALUE));
};
struct rb_iconv_opt_t
{
VALUE transliterate;
VALUE discard_ilseq;
};
static ID id_transliterate, id_discard_ilseq;
static VALUE rb_eIconvInvalidEncoding;
static VALUE rb_eIconvFailure;
static VALUE rb_eIconvIllegalSeq;
static VALUE rb_eIconvInvalidChar;
static VALUE rb_eIconvOutOfRange;
static VALUE rb_eIconvBrokenLibrary;
static ID rb_success, rb_failed;
static VALUE iconv_fail _((VALUE error, VALUE success, VALUE failed, struct iconv_env_t* env, const char *mesg));
static VALUE iconv_failure_initialize _((VALUE error, VALUE mesg, VALUE success, VALUE failed));
static VALUE iconv_failure_success _((VALUE self));
static VALUE iconv_failure_failed _((VALUE self));
static iconv_t iconv_create _((VALUE to, VALUE from, struct rb_iconv_opt_t *opt, int *idx));
static void iconv_dfree _((void *cd));
static VALUE iconv_free _((VALUE cd));
static VALUE iconv_try _((iconv_t cd, const char **inptr, size_t *inlen, char **outptr, size_t *outlen));
static VALUE rb_str_derive _((VALUE str, const char* ptr, int len));
static VALUE iconv_convert _((iconv_t cd, VALUE str, long start, long length, int toidx,
struct iconv_env_t* env));
static VALUE iconv_s_allocate _((VALUE klass));
static VALUE iconv_initialize _((int argc, VALUE *argv, VALUE self));
static VALUE iconv_s_open _((int argc, VALUE *argv, VALUE self));
static VALUE iconv_s_convert _((struct iconv_env_t* env));
static VALUE iconv_s_iconv _((int argc, VALUE *argv, VALUE self));
static VALUE iconv_init_state _((VALUE cd));
static VALUE iconv_finish _((VALUE self));
static VALUE iconv_iconv _((int argc, VALUE *argv, VALUE self));
static VALUE iconv_conv _((int argc, VALUE *argv, VALUE self));
static VALUE charset_map;
/*
* Document-method: charset_map
* call-seq: Iconv.charset_map
*
* Returns the map from canonical name to system dependent name.
*/
static VALUE
charset_map_get(void)
{
return charset_map;
}
static VALUE
strip_glibc_option(VALUE *code)
{
VALUE val = StringValue(*code);
const char *ptr = RSTRING_PTR(val), *pend = RSTRING_END(val);
const char *slash = memchr(ptr, '/', pend - ptr);
if (slash && slash < pend - 1 && slash[1] == '/') {
VALUE opt = rb_str_subseq(val, slash - ptr, pend - slash);
val = rb_str_subseq(val, 0, slash - ptr);
*code = val;
return opt;
}
return 0;
}
static char *
map_charset(VALUE *code)
{
VALUE val = StringValue(*code);
if (RHASH_SIZE(charset_map)) {
VALUE key = rb_funcall2(val, rb_intern("downcase"), 0, 0);
StringValuePtr(key);
if (st_lookup(RHASH_TBL(charset_map), key, &val)) {
*code = val;
}
}
return StringValuePtr(*code);
}
static iconv_t
iconv_create(VALUE to, VALUE from, struct rb_iconv_opt_t *opt, int *idx)
{
VALUE toopt = strip_glibc_option(&to);
VALUE fromopt = strip_glibc_option(&from);
VALUE toenc = 0, fromenc = 0;
const char* tocode = map_charset(&to);
const char* fromcode = map_charset(&from);
iconv_t cd;
int retry = 0;
*idx = rb_enc_find_index(tocode);
if (toopt) {
toenc = rb_str_plus(to, toopt);
tocode = RSTRING_PTR(toenc);
}
if (fromopt) {
fromenc = rb_str_plus(from, fromopt);
fromcode = RSTRING_PTR(fromenc);
}
while ((cd = iconv_open(tocode, fromcode)) == (iconv_t)-1) {
int inval = 0;
switch (errno) {
case EMFILE:
case ENFILE:
case ENOMEM:
if (!retry++) {
rb_gc();
continue;
}
break;
case EINVAL:
retry = 0;
inval = 1;
if (toenc) {
tocode = RSTRING_PTR(to);
rb_str_resize(toenc, 0);
toenc = 0;
continue;
}
if (fromenc) {
fromcode = RSTRING_PTR(from);
rb_str_resize(fromenc, 0);
fromenc = 0;
continue;
}
break;
}
{
const char *s = inval ? "invalid encoding " : "iconv";
volatile VALUE msg = rb_str_new(0, strlen(s) + RSTRING_LEN(to) +
RSTRING_LEN(from) + 8);
sprintf(RSTRING_PTR(msg), "%s(\"%s\", \"%s\")",
s, RSTRING_PTR(to), RSTRING_PTR(from));
s = RSTRING_PTR(msg);
rb_str_set_len(msg, strlen(s));
if (!inval) rb_sys_fail(s);
iconv_fail(rb_eIconvInvalidEncoding,
Qnil, rb_ary_new3(2, to, from), NULL, s);
}
}
if (toopt || fromopt) {
if (toopt && fromopt && RTEST(rb_str_equal(toopt, fromopt))) {
fromopt = 0;
}
if (toopt && fromopt) {
rb_warning("encoding option isn't portable: %s, %s",
RSTRING_PTR(toopt) + 2, RSTRING_PTR(fromopt) + 2);
}
else {
rb_warning("encoding option isn't portable: %s",
(toopt ? RSTRING_PTR(toopt) : RSTRING_PTR(fromopt)) + 2);
}
}
if (opt) {
#ifdef ICONV_SET_TRANSLITERATE
if (opt->transliterate != Qundef) {
int flag = RTEST(opt->transliterate);
rb_warning("encoding option isn't portable: transliterate");
if (iconvctl(cd, ICONV_SET_TRANSLITERATE, (void *)&flag))
rb_sys_fail("ICONV_SET_TRANSLITERATE");
}
#endif
#ifdef ICONV_SET_DISCARD_ILSEQ
if (opt->discard_ilseq != Qundef) {
int flag = RTEST(opt->discard_ilseq);
rb_warning("encoding option isn't portable: discard_ilseq");
if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&flag))
rb_sys_fail("ICONV_SET_DISCARD_ILSEQ");
}
#endif
}
return cd;
}
static void
iconv_dfree(void *cd)
{
iconv_close(VALUE2ICONV(cd));
}
#define ICONV_FREE iconv_dfree
static VALUE
iconv_free(VALUE cd)
{
if (cd && iconv_close(VALUE2ICONV(cd)) == -1)
rb_sys_fail("iconv_close");
return Qnil;
}
static VALUE
check_iconv(VALUE obj)
{
Check_Type(obj, T_DATA);
if (RDATA(obj)->dfree != ICONV_FREE) {
rb_raise(rb_eArgError, "Iconv expected (%s)", rb_class2name(CLASS_OF(obj)));
}
return (VALUE)DATA_PTR(obj);
}
static VALUE
iconv_try(iconv_t cd, const char **inptr, size_t *inlen, char **outptr, size_t *outlen)
{
#ifdef ICONV_INPTR_CONST
#define ICONV_INPTR_CAST
#else
#define ICONV_INPTR_CAST (char **)
#endif
size_t ret;
errno = 0;
ret = iconv(cd, ICONV_INPTR_CAST inptr, inlen, outptr, outlen);
if (ret == (size_t)-1) {
if (!*inlen)
return Qfalse;
switch (errno) {
case E2BIG:
/* try the left in next loop */
break;
case EILSEQ:
return rb_eIconvIllegalSeq;
case EINVAL:
return rb_eIconvInvalidChar;
case 0:
return rb_eIconvBrokenLibrary;
default:
rb_sys_fail("iconv");
}
}
else if (*inlen > 0) {
/* something goes wrong */
return rb_eIconvIllegalSeq;
}
else if (ret) {
return Qnil; /* conversion */
}
return Qfalse;
}
#define FAILED_MAXLEN 16
static VALUE
iconv_failure_initialize(VALUE error, VALUE mesg, VALUE success, VALUE failed)
{
rb_call_super(1, &mesg);
rb_ivar_set(error, rb_success, success);
rb_ivar_set(error, rb_failed, failed);
return error;
}
static VALUE
iconv_fail(VALUE error, VALUE success, VALUE failed, struct iconv_env_t* env, const char *mesg)
{
VALUE args[3];
if (mesg && *mesg) {
args[0] = rb_str_new2(mesg);
}
else if (TYPE(failed) != T_STRING || RSTRING_LEN(failed) < FAILED_MAXLEN) {
args[0] = rb_inspect(failed);
}
else {
args[0] = rb_inspect(rb_str_substr(failed, 0, FAILED_MAXLEN));
rb_str_cat2(args[0], "...");
}
args[1] = success;
args[2] = failed;
if (env) {
args[1] = env->append(rb_obj_dup(env->ret), success);
if (env->argc > 0) {
*(env->argv) = failed;
args[2] = rb_ary_new4(env->argc, env->argv);
}
}
error = rb_class_new_instance(3, args, error);
if (!rb_block_given_p()) rb_exc_raise(error);
rb_set_errinfo(error);
return rb_yield(failed);
}
static VALUE
rb_str_derive(VALUE str, const char* ptr, int len)
{
VALUE ret;
if (NIL_P(str))
return rb_str_new(ptr, len);
if (RSTRING_PTR(str) + RSTRING_LEN(str) == ptr + len)
ret = rb_str_subseq(str, ptr - RSTRING_PTR(str), len);
else
ret = rb_str_new(ptr, len);
OBJ_INFECT(ret, str);
return ret;
}
static VALUE
iconv_convert(iconv_t cd, VALUE str, long start, long length, int toidx, struct iconv_env_t* env)
{
VALUE ret = Qfalse;
VALUE error = Qfalse;
VALUE rescue;
const char *inptr, *instart;
size_t inlen;
/* I believe ONE CHARACTER never exceed this. */
char buffer[BUFSIZ];
char *outptr;
size_t outlen;
if (cd == (iconv_t)-1)
rb_raise(rb_eArgError, "closed iconv");
if (NIL_P(str)) {
/* Reset output pointer or something. */
inptr = "";
inlen = 0;
outptr = buffer;
outlen = sizeof(buffer);
error = iconv_try(cd, &inptr, &inlen, &outptr, &outlen);
if (RTEST(error)) {
unsigned int i;
rescue = iconv_fail(error, Qnil, Qnil, env, 0);
if (TYPE(rescue) == T_ARRAY) {
str = RARRAY_LEN(rescue) > 0 ? RARRAY_PTR(rescue)[0] : Qnil;
}
if (FIXNUM_P(str) && (i = FIX2INT(str)) <= 0xff) {
char c = i;
str = rb_str_new(&c, 1);
}
else if (!NIL_P(str)) {
StringValue(str);
}
}
inptr = NULL;
length = 0;
}
else {
int slen;
StringValue(str);
slen = RSTRING_LEN(str);
inptr = RSTRING_PTR(str);
inptr += start;
if (length < 0 || length > start + slen)
length = slen - start;
}
instart = inptr;
inlen = length;
do {
char errmsg[50];
const char *tmpstart = inptr;
outptr = buffer;
outlen = sizeof(buffer);
errmsg[0] = 0;
error = iconv_try(cd, &inptr, &inlen, &outptr, &outlen);
if (0 <= outlen && outlen <= sizeof(buffer)) {
outlen = sizeof(buffer) - outlen;
if (NIL_P(error) || /* something converted */
outlen > inptr - tmpstart || /* input can't contain output */
(outlen < inptr - tmpstart && inlen > 0) || /* something skipped */
memcmp(buffer, tmpstart, outlen)) /* something differs */
{
if (NIL_P(str)) {
ret = rb_str_new(buffer, outlen);
if (toidx >= 0) rb_enc_associate_index(ret, toidx);
}
else {
if (ret) {
ret = rb_str_buf_cat(ret, instart, tmpstart - instart);
}
else {
ret = rb_str_new(instart, tmpstart - instart);
if (toidx >= 0) rb_enc_associate_index(ret, toidx);
OBJ_INFECT(ret, str);
}
ret = rb_str_buf_cat(ret, buffer, outlen);
instart = inptr;
}
}
else if (!inlen) {
inptr = tmpstart + outlen;
}
}
else {
/* Some iconv() have a bug, return *outlen out of range */
sprintf(errmsg, "bug?(output length = %ld)", (long)(sizeof(buffer) - outlen));
error = rb_eIconvOutOfRange;
}
if (RTEST(error)) {
long len = 0;
if (!ret) {
ret = rb_str_derive(str, instart, inptr - instart);
if (toidx >= 0) rb_enc_associate_index(ret, toidx);
}
else if (inptr > instart) {
rb_str_cat(ret, instart, inptr - instart);
}
str = rb_str_derive(str, inptr, inlen);
rescue = iconv_fail(error, ret, str, env, errmsg);
if (TYPE(rescue) == T_ARRAY) {
if ((len = RARRAY_LEN(rescue)) > 0)
rb_str_concat(ret, RARRAY_PTR(rescue)[0]);
if (len > 1 && !NIL_P(str = RARRAY_PTR(rescue)[1])) {
StringValue(str);
inlen = length = RSTRING_LEN(str);
instart = inptr = RSTRING_PTR(str);
continue;
}
}
else if (!NIL_P(rescue)) {
rb_str_concat(ret, rescue);
}
break;
}
} while (inlen > 0);
if (!ret) {
ret = rb_str_derive(str, instart, inptr - instart);
if (toidx >= 0) rb_enc_associate_index(ret, toidx);
}
else if (inptr > instart) {
rb_str_cat(ret, instart, inptr - instart);
}
return ret;
}
static VALUE
iconv_s_allocate(VALUE klass)
{
return Data_Wrap_Struct(klass, 0, ICONV_FREE, 0);
}
static VALUE
get_iconv_opt_i(VALUE i, VALUE arg)
{
struct rb_iconv_opt_t *opt = (struct rb_iconv_opt_t *)arg;
VALUE name, val;
(void)opt;
i = rb_Array(i);
name = rb_ary_entry(i, 0);
val = rb_ary_entry(i, 1);
do {
if (SYMBOL_P(name)) {
ID id = SYM2ID(name);
if (id == id_transliterate) {
#ifdef ICONV_SET_TRANSLITERATE
opt->transliterate = val;
#else
rb_notimplement();
#endif
break;
}
if (id == id_discard_ilseq) {
#ifdef ICONV_SET_DISCARD_ILSEQ
opt->discard_ilseq = val;
#else
rb_notimplement();
#endif
break;
}
}
else {
const char *s = StringValueCStr(name);
if (strcmp(s, "transliterate") == 0) {
#ifdef ICONV_SET_TRANSLITERATE
opt->transliterate = val;
#else
rb_notimplement();
#endif
break;
}
if (strcmp(s, "discard_ilseq") == 0) {
#ifdef ICONV_SET_DISCARD_ILSEQ
opt->discard_ilseq = val;
#else
rb_notimplement();
#endif
break;
}
}
name = rb_inspect(name);
rb_raise(rb_eArgError, "unknown option - %s", StringValueCStr(name));
} while (0);
return Qnil;
}
static void
get_iconv_opt(struct rb_iconv_opt_t *opt, VALUE options)
{
opt->transliterate = Qundef;
opt->discard_ilseq = Qundef;
if (!NIL_P(options)) {
rb_block_call(options, rb_intern("each"), 0, 0, get_iconv_opt_i, (VALUE)opt);
}
}
#define iconv_ctl(self, func, val) (\
iconvctl(VALUE2ICONV(check_iconv(self)), func, (void *)&(val)) ? \
rb_sys_fail(#func) : (void)0)
/*
* Document-method: new
* call-seq: Iconv.new(to, from, [options])
*
* Creates new code converter from a coding-system designated with +from+
* to another one designated with +to+.
*
* === Parameters
*
* +to+:: encoding name for destination
* +from+:: encoding name for source
* +options+:: options for converter
*
* === Exceptions
*
* TypeError:: if +to+ or +from+ aren't String
* InvalidEncoding:: if designated converter couldn't find out
* SystemCallError:: if <tt>iconv_open(3)</tt> fails
*/
static VALUE
iconv_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE to, from, options;
struct rb_iconv_opt_t opt;
int idx;
rb_scan_args(argc, argv, "21", &to, &from, &options);
get_iconv_opt(&opt, options);
iconv_free(check_iconv(self));
DATA_PTR(self) = NULL;
DATA_PTR(self) = (void *)ICONV2VALUE(iconv_create(to, from, &opt, &idx));
if (idx >= 0) ENCODING_SET(self, idx);
return self;
}
/*
* Document-method: open
* call-seq: Iconv.open(to, from) { |iconv| ... }
*
* Equivalent to Iconv.new except that when it is called with a block, it
* yields with the new instance and closes it, and returns the result which
* returned from the block.
*/
static VALUE
iconv_s_open(int argc, VALUE *argv, VALUE self)
{
VALUE to, from, options, cd;
struct rb_iconv_opt_t opt;
int idx;
rb_scan_args(argc, argv, "21", &to, &from, &options);
get_iconv_opt(&opt, options);
cd = ICONV2VALUE(iconv_create(to, from, &opt, &idx));
self = Data_Wrap_Struct(self, NULL, ICONV_FREE, (void *)cd);
if (idx >= 0) ENCODING_SET(self, idx);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, self, (VALUE(*)())iconv_finish, self);
}
else {
return self;
}
}
static VALUE
iconv_s_convert(struct iconv_env_t* env)
{
VALUE last = 0;
for (; env->argc > 0; --env->argc, ++env->argv) {
VALUE s = iconv_convert(env->cd, last = *(env->argv),
0, -1, env->toidx, env);
env->append(env->ret, s);
}
if (!NIL_P(last)) {
VALUE s = iconv_convert(env->cd, Qnil, 0, 0, env->toidx, env);
if (RSTRING_LEN(s))
env->append(env->ret, s);
}
return env->ret;
}
/*
* Document-method: Iconv::iconv
* call-seq: Iconv.iconv(to, from, *strs)
*
* Shorthand for
* Iconv.open(to, from) { |cd|
* (strs + [nil]).collect { |s| cd.iconv(s) }
* }
*
* === Parameters
*
* <tt>to, from</tt>:: see Iconv.new
* <tt>strs</tt>:: strings to be converted
*
* === Exceptions
*
* Exceptions thrown by Iconv.new, Iconv.open and Iconv#iconv.
*/
static VALUE
iconv_s_iconv(int argc, VALUE *argv, VALUE self)
{
struct iconv_env_t arg;
if (argc < 2) /* needs `to' and `from' arguments at least */
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, 2);
arg.argc = argc -= 2;
arg.argv = argv + 2;
arg.append = rb_ary_push;
arg.ret = rb_ary_new2(argc);
arg.cd = iconv_create(argv[0], argv[1], NULL, &arg.toidx);
return rb_ensure(iconv_s_convert, (VALUE)&arg, iconv_free, ICONV2VALUE(arg.cd));
}
/*
* Document-method: Iconv::conv
* call-seq: Iconv.conv(to, from, str)
*
* Shorthand for
* Iconv.iconv(to, from, str).join
* See Iconv.iconv.
*/
static VALUE
iconv_s_conv(VALUE self, VALUE to, VALUE from, VALUE str)
{
struct iconv_env_t arg;
arg.argc = 1;
arg.argv = &str;
arg.append = rb_str_append;
arg.ret = rb_str_new(0, 0);
arg.cd = iconv_create(to, from, NULL, &arg.toidx);
return rb_ensure(iconv_s_convert, (VALUE)&arg, iconv_free, ICONV2VALUE(arg.cd));
}
/*
* Document-method: list
* call-seq: Iconv.list {|*aliases| ... }
*
* Iterates each alias sets.
*/
#ifdef HAVE_ICONVLIST
struct iconv_name_list
{
unsigned int namescount;
const char *const *names;
VALUE array;
};
static VALUE
list_iconv_i(VALUE ptr)
{
struct iconv_name_list *p = (struct iconv_name_list *)ptr;
unsigned int i, namescount = p->namescount;
const char *const *names = p->names;
VALUE ary = rb_ary_new2(namescount);
for (i = 0; i < namescount; i++) {
rb_ary_push(ary, rb_str_new2(names[i]));
}
if (p->array) {
return rb_ary_push(p->array, ary);
}
return rb_yield(ary);
}
static int
list_iconv(unsigned int namescount, const char *const *names, void *data)
{
int *state = data;
struct iconv_name_list list;
list.namescount = namescount;
list.names = names;
list.array = ((VALUE *)data)[1];
rb_protect(list_iconv_i, (VALUE)&list, state);
return *state;
}
#endif
#if defined(HAVE_ICONVLIST) || defined(HAVE___ICONV_FREE_LIST)
static VALUE
iconv_s_list(void)
{
#ifdef HAVE_ICONVLIST
int state;
VALUE args[2];
args[1] = rb_block_given_p() ? 0 : rb_ary_new();
iconvlist(list_iconv, args);
state = *(int *)args;
if (state) rb_jump_tag(state);
if (args[1]) return args[1];
#elif defined(HAVE___ICONV_FREE_LIST)
char **list;
size_t sz, i;
VALUE ary;
if (__iconv_get_list(&list, &sz)) return Qnil;
ary = rb_ary_new2(sz);
for (i = 0; i < sz; i++) {
rb_ary_push(ary, rb_str_new2(list[i]));
}
__iconv_free_list(list, sz);
if (!rb_block_given_p())
return ary;
for (i = 0; i < RARRAY_LEN(ary); i++) {
rb_yield(RARRAY_PTR(ary)[i]);
}
#endif
return Qnil;
}
#else
#define iconv_s_list rb_f_notimplement
#endif
/*
* Document-method: close
*
* Finishes conversion.
*
* After calling this, calling Iconv#iconv will cause an exception, but
* multiple calls of #close are guaranteed to end successfully.
*
* Returns a string containing the byte sequence to change the output buffer to
* its initial shift state.
*/
static VALUE
iconv_init_state(VALUE self)
{
iconv_t cd = VALUE2ICONV((VALUE)DATA_PTR(self));
DATA_PTR(self) = NULL;
return iconv_convert(cd, Qnil, 0, 0, ENCODING_GET(self), NULL);
}
static VALUE
iconv_finish(VALUE self)
{
VALUE cd = check_iconv(self);
if (!cd) return Qnil;
return rb_ensure(iconv_init_state, self, iconv_free, cd);
}
/*
* Document-method: Iconv#iconv
* call-seq: iconv(str, start=0, length=-1)
*
* Converts string and returns the result.
* * If +str+ is a String, converts <tt>str[start, length]</tt> and returns the converted string.
* * If +str+ is +nil+, places converter itself into initial shift state and
* just returns a string containing the byte sequence to change the output
* buffer to its initial shift state.
* * Otherwise, raises an exception.
*
* === Parameters
*
* str:: string to be converted, or nil
* start:: starting offset
* length:: conversion length; nil or -1 means whole the string from start
*
* === Exceptions
*
* * IconvIllegalSequence
* * IconvInvalidCharacter
* * IconvOutOfRange
*
* === Examples
*
* See the Iconv documentation.
*/
static VALUE
iconv_iconv(int argc, VALUE *argv, VALUE self)
{
VALUE str, n1, n2;
VALUE cd = check_iconv(self);
long start = 0, length = 0, slen = 0;
rb_scan_args(argc, argv, "12", &str, &n1, &n2);
if (!NIL_P(str)) {
VALUE n = rb_str_length(StringValue(str));
slen = NUM2LONG(n);
}
if (argc != 2 || !RTEST(rb_range_beg_len(n1, &start, &length, slen, 0))) {
if (NIL_P(n1) || ((start = NUM2LONG(n1)) < 0 ? (start += slen) >= 0 : start < slen)) {
length = NIL_P(n2) ? -1 : NUM2LONG(n2);
}
}
if (start > 0 || length > 0) {
rb_encoding *enc = rb_enc_get(str);
const char *s = RSTRING_PTR(str), *e = s + RSTRING_LEN(str);
const char *ps = s;
if (start > 0) {
start = (ps = rb_enc_nth(s, e, start, enc)) - s;
}
if (length > 0) {
length = rb_enc_nth(ps, e, length, enc) - ps;
}
}
return iconv_convert(VALUE2ICONV(cd), str, start, length, ENCODING_GET(self), NULL);
}
/*
* Document-method: conv
* call-seq: conv(str...)
*
* Equivalent to
*
* iconv(nil, str..., nil).join
*/
static VALUE
iconv_conv(int argc, VALUE *argv, VALUE self)
{
iconv_t cd = VALUE2ICONV(check_iconv(self));
VALUE str, s;
int toidx = ENCODING_GET(self);
str = iconv_convert(cd, Qnil, 0, 0, toidx, NULL);
if (argc > 0) {
do {
s = iconv_convert(cd, *argv++, 0, -1, toidx, NULL);
if (RSTRING_LEN(s))
rb_str_buf_append(str, s);
} while (--argc);
s = iconv_convert(cd, Qnil, 0, 0, toidx, NULL);
if (RSTRING_LEN(s))
rb_str_buf_append(str, s);
}
return str;
}
#ifdef ICONV_TRIVIALP
/*
* Document-method: trivial?
* call-seq: trivial?
*
* Returns trivial flag.
*/
static VALUE
iconv_trivialp(VALUE self)
{
int trivial = 0;
iconv_ctl(self, ICONV_TRIVIALP, trivial);
if (trivial) return Qtrue;
return Qfalse;
}
#else
#define iconv_trivialp rb_f_notimplement
#endif
#ifdef ICONV_GET_TRANSLITERATE
/*
* Document-method: transliterate?
* call-seq: transliterate?
*
* Returns transliterate flag.
*/
static VALUE
iconv_get_transliterate(VALUE self)
{
int trans = 0;
iconv_ctl(self, ICONV_GET_TRANSLITERATE, trans);
if (trans) return Qtrue;
return Qfalse;
}
#else
#define iconv_get_transliterate rb_f_notimplement
#endif
#ifdef ICONV_SET_TRANSLITERATE
/*
* Document-method: transliterate=
* call-seq: cd.transliterate = flag
*
* Sets transliterate flag.
*/
static VALUE
iconv_set_transliterate(VALUE self, VALUE transliterate)
{
int trans = RTEST(transliterate);
iconv_ctl(self, ICONV_SET_TRANSLITERATE, trans);
return self;
}
#else
#define iconv_set_transliterate rb_f_notimplement
#endif
#ifdef ICONV_GET_DISCARD_ILSEQ
/*
* Document-method: discard_ilseq?
* call-seq: discard_ilseq?
*
* Returns discard_ilseq flag.
*/
static VALUE
iconv_get_discard_ilseq(VALUE self)
{
int dis = 0;
iconv_ctl(self, ICONV_GET_DISCARD_ILSEQ, dis);
if (dis) return Qtrue;
return Qfalse;
}
#else
#define iconv_get_discard_ilseq rb_f_notimplement
#endif
#ifdef ICONV_SET_DISCARD_ILSEQ
/*
* Document-method: discard_ilseq=
* call-seq: cd.discard_ilseq = flag
*
* Sets discard_ilseq flag.
*/
static VALUE
iconv_set_discard_ilseq(VALUE self, VALUE discard_ilseq)
{
int dis = RTEST(discard_ilseq);
iconv_ctl(self, ICONV_SET_DISCARD_ILSEQ, dis);
return self;
}
#else
#define iconv_set_discard_ilseq rb_f_notimplement
#endif
/*
* Document-method: ctlmethods
* call-seq: Iconv.ctlmethods => array
*
* Returns available iconvctl() method list.
*/
static VALUE
iconv_s_ctlmethods(VALUE klass)
{
VALUE ary = rb_ary_new();
#ifdef ICONV_TRIVIALP
rb_ary_push(ary, ID2SYM(rb_intern("trivial?")));
#endif
#ifdef ICONV_GET_TRANSLITERATE
rb_ary_push(ary, ID2SYM(rb_intern("transliterate?")));
#endif
#ifdef ICONV_SET_TRANSLITERATE
rb_ary_push(ary, ID2SYM(rb_intern("transliterate=")));
#endif
#ifdef ICONV_GET_DISCARD_ILSEQ
rb_ary_push(ary, ID2SYM(rb_intern("discard_ilseq?")));
#endif
#ifdef ICONV_SET_DISCARD_ILSEQ
rb_ary_push(ary, ID2SYM(rb_intern("discard_ilseq=")));
#endif
return ary;
}
/*
* Document-class: Iconv::Failure
*
* Base attributes for Iconv exceptions.
*/
/*
* Document-method: success
* call-seq: success
*
* Returns string(s) translated successfully until the exception occurred.
* * In the case of failure occurred within Iconv.iconv, returned
* value is an array of strings translated successfully preceding
* failure and the last element is string on the way.
*/
static VALUE
iconv_failure_success(VALUE self)
{
return rb_attr_get(self, rb_success);
}
/*
* Document-method: failed
* call-seq: failed
*
* Returns substring of the original string passed to Iconv that starts at the
* character caused the exception.
*/
static VALUE
iconv_failure_failed(VALUE self)
{
return rb_attr_get(self, rb_failed);
}
/*
* Document-method: inspect
* call-seq: inspect
*
* Returns inspected string like as: #<_class_: _success_, _failed_>
*/
static VALUE
iconv_failure_inspect(VALUE self)
{
const char *cname = rb_class2name(CLASS_OF(self));
VALUE success = rb_attr_get(self, rb_success);
VALUE failed = rb_attr_get(self, rb_failed);
VALUE str = rb_str_buf_cat2(rb_str_new2("#<"), cname);
str = rb_str_buf_cat(str, ": ", 2);
str = rb_str_buf_append(str, rb_inspect(success));
str = rb_str_buf_cat(str, ", ", 2);
str = rb_str_buf_append(str, rb_inspect(failed));
return rb_str_buf_cat(str, ">", 1);
}
/*
* Document-class: Iconv::InvalidEncoding
*
* Requested coding-system is not available on this system.
*/
/*
* Document-class: Iconv::IllegalSequence
*
* Input conversion stopped due to an input byte that does not belong to
* the input codeset, or the output codeset does not contain the
* character.
*/
/*
* Document-class: Iconv::InvalidCharacter
*
* Input conversion stopped due to an incomplete character or shift
* sequence at the end of the input buffer.
*/
/*
* Document-class: Iconv::OutOfRange
*
* Iconv library internal error. Must not occur.
*/
/*
* Document-class: Iconv::BrokenLibrary
*
* Detected a bug of underlying iconv(3) libray.
* * returns an error without setting errno properly
*/
void
Init_iconv(void)
{
VALUE rb_cIconv = rb_define_class("Iconv", rb_cData);
rb_define_alloc_func(rb_cIconv, iconv_s_allocate);
rb_define_singleton_method(rb_cIconv, "open", iconv_s_open, -1);
rb_define_singleton_method(rb_cIconv, "iconv", iconv_s_iconv, -1);
rb_define_singleton_method(rb_cIconv, "conv", iconv_s_conv, 3);
rb_define_singleton_method(rb_cIconv, "list", iconv_s_list, 0);
rb_define_singleton_method(rb_cIconv, "ctlmethods", iconv_s_ctlmethods, 0);
rb_define_method(rb_cIconv, "initialize", iconv_initialize, -1);
rb_define_method(rb_cIconv, "close", iconv_finish, 0);
rb_define_method(rb_cIconv, "iconv", iconv_iconv, -1);
rb_define_method(rb_cIconv, "conv", iconv_conv, -1);
rb_define_method(rb_cIconv, "trivial?", iconv_trivialp, 0);
rb_define_method(rb_cIconv, "transliterate?", iconv_get_transliterate, 0);
rb_define_method(rb_cIconv, "transliterate=", iconv_set_transliterate, 1);
rb_define_method(rb_cIconv, "discard_ilseq?", iconv_get_discard_ilseq, 0);
rb_define_method(rb_cIconv, "discard_ilseq=", iconv_set_discard_ilseq, 1);
rb_eIconvFailure = rb_define_module_under(rb_cIconv, "Failure");
rb_define_method(rb_eIconvFailure, "initialize", iconv_failure_initialize, 3);
rb_define_method(rb_eIconvFailure, "success", iconv_failure_success, 0);
rb_define_method(rb_eIconvFailure, "failed", iconv_failure_failed, 0);
rb_define_method(rb_eIconvFailure, "inspect", iconv_failure_inspect, 0);
rb_eIconvInvalidEncoding = rb_define_class_under(rb_cIconv, "InvalidEncoding", rb_eArgError);
rb_eIconvIllegalSeq = rb_define_class_under(rb_cIconv, "IllegalSequence", rb_eArgError);
rb_eIconvInvalidChar = rb_define_class_under(rb_cIconv, "InvalidCharacter", rb_eArgError);
rb_eIconvOutOfRange = rb_define_class_under(rb_cIconv, "OutOfRange", rb_eRuntimeError);
rb_eIconvBrokenLibrary = rb_define_class_under(rb_cIconv, "BrokenLibrary", rb_eRuntimeError);
rb_include_module(rb_eIconvInvalidEncoding, rb_eIconvFailure);
rb_include_module(rb_eIconvIllegalSeq, rb_eIconvFailure);
rb_include_module(rb_eIconvInvalidChar, rb_eIconvFailure);
rb_include_module(rb_eIconvOutOfRange, rb_eIconvFailure);
rb_include_module(rb_eIconvBrokenLibrary, rb_eIconvFailure);
rb_success = rb_intern("success");
rb_failed = rb_intern("failed");
id_transliterate = rb_intern("transliterate");
id_discard_ilseq = rb_intern("discard_ilseq");
rb_gc_register_address(&charset_map);
charset_map = rb_hash_new();
rb_define_singleton_method(rb_cIconv, "charset_map", charset_map_get, 0);
}
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