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iconv.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2016 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rui Hirokawa <[email protected]> |
| Stig Bakken <[email protected]> |
| Moriyoshi Koizumi <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_globals.h"
#include "ext/standard/info.h"
#include "main/php_output.h"
#include "SAPI.h"
#include "php_ini.h"
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#include <errno.h>
#include "php_iconv.h"
#ifdef HAVE_ICONV
#ifdef PHP_ICONV_H_PATH
#include PHP_ICONV_H_PATH
#else
#include <iconv.h>
#endif
#ifdef HAVE_GLIBC_ICONV
#include <gnu/libc-version.h>
#endif
#ifdef HAVE_LIBICONV
#undef iconv
#endif
#include "zend_smart_str.h"
#include "ext/standard/base64.h"
#include "ext/standard/quot_print.h"
#define _php_iconv_memequal(a, b, c) \
((c) == sizeof(zend_ulong) ? *((zend_ulong *)(a)) == *((zend_ulong *)(b)) : ((c) == sizeof(unsigned int) ? *((unsigned int *)(a)) == *((unsigned int *)(b)) : memcmp(a, b, c) == 0))
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_strlen, 0, 0, 1)
ZEND_ARG_INFO(0, str)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_substr, 0, 0, 2)
ZEND_ARG_INFO(0, str)
ZEND_ARG_INFO(0, offset)
ZEND_ARG_INFO(0, length)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_strpos, 0, 0, 2)
ZEND_ARG_INFO(0, haystack)
ZEND_ARG_INFO(0, needle)
ZEND_ARG_INFO(0, offset)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_strrpos, 0, 0, 2)
ZEND_ARG_INFO(0, haystack)
ZEND_ARG_INFO(0, needle)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_mime_encode, 0, 0, 2)
ZEND_ARG_INFO(0, field_name)
ZEND_ARG_INFO(0, field_value)
ZEND_ARG_INFO(0, preference) /* ZEND_ARG_ARRAY_INFO(0, preference, 1) */
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_mime_decode, 0, 0, 1)
ZEND_ARG_INFO(0, encoded_string)
ZEND_ARG_INFO(0, mode)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_mime_decode_headers, 0, 0, 1)
ZEND_ARG_INFO(0, headers)
ZEND_ARG_INFO(0, mode)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_iconv, 0)
ZEND_ARG_INFO(0, in_charset)
ZEND_ARG_INFO(0, out_charset)
ZEND_ARG_INFO(0, str)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_iconv_set_encoding, 0)
ZEND_ARG_INFO(0, type)
ZEND_ARG_INFO(0, charset)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_iconv_get_encoding, 0, 0, 0)
ZEND_ARG_INFO(0, type)
ZEND_END_ARG_INFO()
/* }}} */
/* {{{ iconv_functions[]
*/
const zend_function_entry iconv_functions[] = {
PHP_RAW_NAMED_FE(iconv,php_if_iconv, arginfo_iconv)
PHP_FE(iconv_get_encoding, arginfo_iconv_get_encoding)
PHP_FE(iconv_set_encoding, arginfo_iconv_set_encoding)
PHP_FE(iconv_strlen, arginfo_iconv_strlen)
PHP_FE(iconv_substr, arginfo_iconv_substr)
PHP_FE(iconv_strpos, arginfo_iconv_strpos)
PHP_FE(iconv_strrpos, arginfo_iconv_strrpos)
PHP_FE(iconv_mime_encode, arginfo_iconv_mime_encode)
PHP_FE(iconv_mime_decode, arginfo_iconv_mime_decode)
PHP_FE(iconv_mime_decode_headers, arginfo_iconv_mime_decode_headers)
PHP_FE_END
};
/* }}} */
ZEND_DECLARE_MODULE_GLOBALS(iconv)
static PHP_GINIT_FUNCTION(iconv);
/* {{{ iconv_module_entry
*/
zend_module_entry iconv_module_entry = {
STANDARD_MODULE_HEADER,
"iconv",
iconv_functions,
PHP_MINIT(miconv),
PHP_MSHUTDOWN(miconv),
NULL,
NULL,
PHP_MINFO(miconv),
PHP_ICONV_VERSION,
PHP_MODULE_GLOBALS(iconv),
PHP_GINIT(iconv),
NULL,
NULL,
STANDARD_MODULE_PROPERTIES_EX
};
/* }}} */
#ifdef COMPILE_DL_ICONV
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(iconv)
#endif
/* {{{ PHP_GINIT_FUNCTION */
static PHP_GINIT_FUNCTION(iconv)
{
#if defined(COMPILE_DL_ICONV) && defined(ZTS)
ZEND_TSRMLS_CACHE_UPDATE();
#endif
iconv_globals->input_encoding = NULL;
iconv_globals->output_encoding = NULL;
iconv_globals->internal_encoding = NULL;
}
/* }}} */
#if defined(HAVE_LIBICONV) && defined(ICONV_ALIASED_LIBICONV)
#define iconv libiconv
#endif
/* {{{ typedef enum php_iconv_enc_scheme_t */
typedef enum _php_iconv_enc_scheme_t {
PHP_ICONV_ENC_SCHEME_BASE64,
PHP_ICONV_ENC_SCHEME_QPRINT
} php_iconv_enc_scheme_t;
/* }}} */
#define PHP_ICONV_MIME_DECODE_STRICT (1<<0)
#define PHP_ICONV_MIME_DECODE_CONTINUE_ON_ERROR (1<<1)
/* {{{ prototypes */
static php_iconv_err_t _php_iconv_appendl(smart_str *d, const char *s, size_t l, iconv_t cd);
static php_iconv_err_t _php_iconv_appendc(smart_str *d, const char c, iconv_t cd);
static void _php_iconv_show_error(php_iconv_err_t err, const char *out_charset, const char *in_charset);
static php_iconv_err_t _php_iconv_strlen(size_t *pretval, const char *str, size_t nbytes, const char *enc);
static php_iconv_err_t _php_iconv_substr(smart_str *pretval, const char *str, size_t nbytes, zend_long offset, zend_long len, const char *enc);
static php_iconv_err_t _php_iconv_strpos(size_t *pretval, const char *haystk, size_t haystk_nbytes, const char *ndl, size_t ndl_nbytes, zend_long offset, const char *enc);
static php_iconv_err_t _php_iconv_mime_encode(smart_str *pretval, const char *fname, size_t fname_nbytes, const char *fval, size_t fval_nbytes, size_t max_line_len, const char *lfchars, php_iconv_enc_scheme_t enc_scheme, const char *out_charset, const char *enc);
static php_iconv_err_t _php_iconv_mime_decode(smart_str *pretval, const char *str, size_t str_nbytes, const char *enc, const char **next_pos, int mode);
static php_iconv_err_t php_iconv_stream_filter_register_factory(void);
static php_iconv_err_t php_iconv_stream_filter_unregister_factory(void);
static int php_iconv_output_conflict(const char *handler_name, size_t handler_name_len);
static php_output_handler *php_iconv_output_handler_init(const char *name, size_t name_len, size_t chunk_size, int flags);
static int php_iconv_output_handler(void **nothing, php_output_context *output_context);
/* }}} */
/* {{{ static globals */
static char _generic_superset_name[] = ICONV_UCS4_ENCODING;
#define GENERIC_SUPERSET_NAME _generic_superset_name
#define GENERIC_SUPERSET_NBYTES 4
/* }}} */
static PHP_INI_MH(OnUpdateInputEncoding)
{
if (ZSTR_LEN(new_value) >= ICONV_CSNMAXLEN) {
return FAILURE;
}
if (stage & (PHP_INI_STAGE_ACTIVATE | PHP_INI_STAGE_RUNTIME)) {
php_error_docref("ref.iconv", E_DEPRECATED, "Use of iconv.input_encoding is deprecated");
}
OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
return SUCCESS;
}
static PHP_INI_MH(OnUpdateOutputEncoding)
{
if (ZSTR_LEN(new_value) >= ICONV_CSNMAXLEN) {
return FAILURE;
}
if (stage & (PHP_INI_STAGE_ACTIVATE | PHP_INI_STAGE_RUNTIME)) {
php_error_docref("ref.iconv", E_DEPRECATED, "Use of iconv.output_encoding is deprecated");
}
OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
return SUCCESS;
}
static PHP_INI_MH(OnUpdateInternalEncoding)
{
if (ZSTR_LEN(new_value) >= ICONV_CSNMAXLEN) {
return FAILURE;
}
if (stage & (PHP_INI_STAGE_ACTIVATE | PHP_INI_STAGE_RUNTIME)) {
php_error_docref("ref.iconv", E_DEPRECATED, "Use of iconv.internal_encoding is deprecated");
}
OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
return SUCCESS;
}
/* {{{ PHP_INI
*/
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("iconv.input_encoding", "", PHP_INI_ALL, OnUpdateInputEncoding, input_encoding, zend_iconv_globals, iconv_globals)
STD_PHP_INI_ENTRY("iconv.output_encoding", "", PHP_INI_ALL, OnUpdateOutputEncoding, output_encoding, zend_iconv_globals, iconv_globals)
STD_PHP_INI_ENTRY("iconv.internal_encoding", "", PHP_INI_ALL, OnUpdateInternalEncoding, internal_encoding, zend_iconv_globals, iconv_globals)
PHP_INI_END()
/* }}} */
/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(miconv)
{
char *version = "unknown";
REGISTER_INI_ENTRIES();
#if HAVE_LIBICONV
{
static char buf[16];
snprintf(buf, sizeof(buf), "%d.%d",
((_libiconv_version >> 8) & 0x0f), (_libiconv_version & 0x0f));
version = buf;
}
#elif HAVE_GLIBC_ICONV
version = (char *)gnu_get_libc_version();
#endif
#ifdef PHP_ICONV_IMPL
REGISTER_STRING_CONSTANT("ICONV_IMPL", PHP_ICONV_IMPL, CONST_CS | CONST_PERSISTENT);
#elif HAVE_LIBICONV
REGISTER_STRING_CONSTANT("ICONV_IMPL", "libiconv", CONST_CS | CONST_PERSISTENT);
#else
REGISTER_STRING_CONSTANT("ICONV_IMPL", "unknown", CONST_CS | CONST_PERSISTENT);
#endif
REGISTER_STRING_CONSTANT("ICONV_VERSION", version, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("ICONV_MIME_DECODE_STRICT", PHP_ICONV_MIME_DECODE_STRICT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("ICONV_MIME_DECODE_CONTINUE_ON_ERROR", PHP_ICONV_MIME_DECODE_CONTINUE_ON_ERROR, CONST_CS | CONST_PERSISTENT);
if (php_iconv_stream_filter_register_factory() != PHP_ICONV_ERR_SUCCESS) {
return FAILURE;
}
php_output_handler_alias_register(ZEND_STRL("ob_iconv_handler"), php_iconv_output_handler_init);
php_output_handler_conflict_register(ZEND_STRL("ob_iconv_handler"), php_iconv_output_conflict);
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(miconv)
{
php_iconv_stream_filter_unregister_factory();
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINFO_FUNCTION */
PHP_MINFO_FUNCTION(miconv)
{
zval *iconv_impl, *iconv_ver;
iconv_impl = zend_get_constant_str("ICONV_IMPL", sizeof("ICONV_IMPL")-1);
iconv_ver = zend_get_constant_str("ICONV_VERSION", sizeof("ICONV_VERSION")-1);
php_info_print_table_start();
php_info_print_table_row(2, "iconv support", "enabled");
php_info_print_table_row(2, "iconv implementation", Z_STRVAL_P(iconv_impl));
php_info_print_table_row(2, "iconv library version", Z_STRVAL_P(iconv_ver));
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
static char *get_internal_encoding(void) {
if (ICONVG(internal_encoding) && ICONVG(internal_encoding)[0]) {
return ICONVG(internal_encoding);
} else if (PG(internal_encoding) && PG(internal_encoding)[0]) {
return PG(internal_encoding);
} else if (SG(default_charset)) {
return SG(default_charset);
}
return "";
}
static char *get_input_encoding(void) {
if (ICONVG(input_encoding) && ICONVG(input_encoding)[0]) {
return ICONVG(input_encoding);
} else if (PG(input_encoding) && PG(input_encoding)[0]) {
return PG(input_encoding);
} else if (SG(default_charset)) {
return SG(default_charset);
}
return "";
}
static char *get_output_encoding(void) {
if (ICONVG(output_encoding) && ICONVG(output_encoding)[0]) {
return ICONVG(output_encoding);
} else if (PG(output_encoding) && PG(output_encoding)[0]) {
return PG(output_encoding);
} else if (SG(default_charset)) {
return SG(default_charset);
}
return "";
}
static int php_iconv_output_conflict(const char *handler_name, size_t handler_name_len)
{
if (php_output_get_level()) {
if (php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL("ob_iconv_handler"))
|| php_output_handler_conflict(handler_name, handler_name_len, ZEND_STRL("mb_output_handler"))) {
return FAILURE;
}
}
return SUCCESS;
}
static php_output_handler *php_iconv_output_handler_init(const char *handler_name, size_t handler_name_len, size_t chunk_size, int flags)
{
return php_output_handler_create_internal(handler_name, handler_name_len, php_iconv_output_handler, chunk_size, flags);
}
static int php_iconv_output_handler(void **nothing, php_output_context *output_context)
{
char *s, *content_type, *mimetype = NULL;
int output_status, mimetype_len = 0;
if (output_context->op & PHP_OUTPUT_HANDLER_START) {
output_status = php_output_get_status();
if (output_status & PHP_OUTPUT_SENT) {
return FAILURE;
}
if (SG(sapi_headers).mimetype && !strncasecmp(SG(sapi_headers).mimetype, "text/", 5)) {
if ((s = strchr(SG(sapi_headers).mimetype,';')) == NULL){
mimetype = SG(sapi_headers).mimetype;
} else {
mimetype = SG(sapi_headers).mimetype;
mimetype_len = (int)(s - SG(sapi_headers).mimetype);
}
} else if (SG(sapi_headers).send_default_content_type) {
mimetype = SG(default_mimetype) ? SG(default_mimetype) : SAPI_DEFAULT_MIMETYPE;
}
if (mimetype != NULL && !(output_context->op & PHP_OUTPUT_HANDLER_CLEAN)) {
size_t len;
char *p = strstr(get_output_encoding(), "//");
if (p) {
len = spprintf(&content_type, 0, "Content-Type:%.*s; charset=%.*s", mimetype_len ? mimetype_len : (int) strlen(mimetype), mimetype, (int) (p - get_output_encoding()), get_output_encoding());
} else {
len = spprintf(&content_type, 0, "Content-Type:%.*s; charset=%s", mimetype_len ? mimetype_len : (int) strlen(mimetype), mimetype, get_output_encoding());
}
if (content_type && SUCCESS == sapi_add_header(content_type, (uint32_t)len, 0)) {
SG(sapi_headers).send_default_content_type = 0;
php_output_handler_hook(PHP_OUTPUT_HANDLER_HOOK_IMMUTABLE, NULL);
}
}
}
if (output_context->in.used) {
zend_string *out;
output_context->out.free = 1;
_php_iconv_show_error(php_iconv_string(output_context->in.data, output_context->in.used, &out, get_output_encoding(), get_internal_encoding()), get_output_encoding(), get_internal_encoding());
if (out) {
output_context->out.data = estrndup(ZSTR_VAL(out), ZSTR_LEN(out));
output_context->out.used = ZSTR_LEN(out);
zend_string_free(out);
} else {
output_context->out.data = NULL;
output_context->out.used = 0;
}
}
return SUCCESS;
}
/* {{{ _php_iconv_appendl() */
static php_iconv_err_t _php_iconv_appendl(smart_str *d, const char *s, size_t l, iconv_t cd)
{
const char *in_p = s;
size_t in_left = l;
char *out_p;
size_t out_left = 0;
size_t buf_growth = 128;
#if !ICONV_SUPPORTS_ERRNO
size_t prev_in_left = in_left;
#endif
if (in_p != NULL) {
while (in_left > 0) {
out_left = buf_growth - out_left;
smart_str_alloc(d, out_left, 0);
out_p = ZSTR_VAL((d)->s) + ZSTR_LEN((d)->s);
if (iconv(cd, (char **)&in_p, &in_left, (char **) &out_p, &out_left) == (size_t)-1) {
#if ICONV_SUPPORTS_ERRNO
switch (errno) {
case EINVAL:
return PHP_ICONV_ERR_ILLEGAL_CHAR;
case EILSEQ:
return PHP_ICONV_ERR_ILLEGAL_SEQ;
case E2BIG:
break;
default:
return PHP_ICONV_ERR_UNKNOWN;
}
#else
if (prev_in_left == in_left) {
return PHP_ICONV_ERR_UNKNOWN;
}
#endif
}
#if !ICONV_SUPPORTS_ERRNO
prev_in_left = in_left;
#endif
ZSTR_LEN((d)->s) += (buf_growth - out_left);
buf_growth <<= 1;
}
} else {
for (;;) {
out_left = buf_growth - out_left;
smart_str_alloc(d, out_left, 0);
out_p = ZSTR_VAL((d)->s) + ZSTR_LEN((d)->s);
if (iconv(cd, NULL, NULL, (char **) &out_p, &out_left) == (size_t)0) {
ZSTR_LEN((d)->s) += (buf_growth - out_left);
break;
} else {
#if ICONV_SUPPORTS_ERRNO
if (errno != E2BIG) {
return PHP_ICONV_ERR_UNKNOWN;
}
#else
if (out_left != 0) {
return PHP_ICONV_ERR_UNKNOWN;
}
#endif
}
ZSTR_LEN((d)->s) += (buf_growth - out_left);
buf_growth <<= 1;
}
}
return PHP_ICONV_ERR_SUCCESS;
}
/* }}} */
/* {{{ _php_iconv_appendc() */
static php_iconv_err_t _php_iconv_appendc(smart_str *d, const char c, iconv_t cd)
{
return _php_iconv_appendl(d, &c, 1, cd);
}
/* }}} */
/* {{{ */
#if ICONV_BROKEN_IGNORE
static int _php_check_ignore(const char *charset)
{
size_t clen = strlen(charset);
if (clen >= 9 && strcmp("//IGNORE", charset+clen-8) == 0) {
return 1;
}
if (clen >= 19 && strcmp("//IGNORE//TRANSLIT", charset+clen-18) == 0) {
return 1;
}
return 0;
}
#else
#define _php_check_ignore(x) (0)
#endif
/* }}} */
/* {{{ php_iconv_string()
*/
PHP_ICONV_API php_iconv_err_t php_iconv_string(const char *in_p, size_t in_len, zend_string **out, const char *out_charset, const char *in_charset)
{
#if !ICONV_SUPPORTS_ERRNO
size_t in_size, out_size, out_left;
char *out_p;
iconv_t cd;
size_t result;
zend_string *ret, *out_buffer;
/*
This is not the right way to get output size...
This is not space efficient for large text.
This is also problem for encoding like UTF-7/UTF-8/ISO-2022 which
a single char can be more than 4 bytes.
I added 15 extra bytes for safety. <[email protected]>
*/
out_size = in_len * sizeof(int) + 15;
out_left = out_size;
in_size = in_len;
cd = iconv_open(out_charset, in_charset);
if (cd == (iconv_t)(-1)) {
return PHP_ICONV_ERR_UNKNOWN;
}
out_buffer = zend_string_alloc(out_size, 0);
out_p = ZSTR_VAL(out_buffer);
result = iconv(cd, (const char **) &in_p, &in_size, (char **) &out_p, &out_left);
if (result == (size_t)(-1)) {
zend_string_free(out_buffer);
return PHP_ICONV_ERR_UNKNOWN;
}
if (out_left < 8) {
size_t pos = out_p - ZSTR_VAL(out_buffer);
out_buffer = zend_string_extend(out_buffer, out_size + 8, 0);
out_p = ZSTR_VAL(out_buffer) + pos;
out_size += 7;
out_left += 7;
}
/* flush the shift-out sequences */
result = iconv(cd, NULL, NULL, &out_p, &out_left);
if (result == (size_t)(-1)) {
zend_string_free(out_buffer);
return PHP_ICONV_ERR_UNKNOWN;
}
ZSTR_VAL(out_buffer)[out_size - out_left] = '\0';
ZSTR_LEN(out_buffer) = out_size - out_left;
iconv_close(cd);
*out = out_buffer;
return PHP_ICONV_ERR_SUCCESS;
#else
/*
iconv supports errno. Handle it better way.
*/
iconv_t cd;
size_t in_left, out_size, out_left;
char *out_p;
size_t bsz, result = 0;
php_iconv_err_t retval = PHP_ICONV_ERR_SUCCESS;
zend_string *out_buf;
int ignore_ilseq = _php_check_ignore(out_charset);
*out = NULL;
cd = iconv_open(out_charset, in_charset);
if (cd == (iconv_t)(-1)) {
if (errno == EINVAL) {
return PHP_ICONV_ERR_WRONG_CHARSET;
} else {
return PHP_ICONV_ERR_CONVERTER;
}
}
in_left= in_len;
out_left = in_len + 32; /* Avoid realloc() most cases */
out_size = 0;
bsz = out_left;
out_buf = zend_string_alloc(bsz, 0);
out_p = ZSTR_VAL(out_buf);
while (in_left > 0) {
result = iconv(cd, (char **) &in_p, &in_left, (char **) &out_p, &out_left);
out_size = bsz - out_left;
if (result == (size_t)(-1)) {
if (ignore_ilseq && errno == EILSEQ) {
if (in_left <= 1) {
result = 0;
} else {
errno = 0;
in_p++;
in_left--;
continue;
}
}
if (errno == E2BIG && in_left > 0) {
/* converted string is longer than out buffer */
bsz += in_len;
out_buf = zend_string_extend(out_buf, bsz, 0);
out_p = ZSTR_VAL(out_buf);
out_p += out_size;
out_left = bsz - out_size;
continue;
}
}
break;
}
if (result != (size_t)(-1)) {
/* flush the shift-out sequences */
for (;;) {
result = iconv(cd, NULL, NULL, (char **) &out_p, &out_left);
out_size = bsz - out_left;
if (result != (size_t)(-1)) {
break;
}
if (errno == E2BIG) {
bsz += 16;
out_buf = zend_string_extend(out_buf, bsz, 0);
out_p = ZSTR_VAL(out_buf);
out_p += out_size;
out_left = bsz - out_size;
} else {
break;
}
}
}
iconv_close(cd);
if (result == (size_t)(-1)) {
switch (errno) {
case EINVAL:
retval = PHP_ICONV_ERR_ILLEGAL_CHAR;
break;
case EILSEQ:
retval = PHP_ICONV_ERR_ILLEGAL_SEQ;
break;
case E2BIG:
/* should not happen */
retval = PHP_ICONV_ERR_TOO_BIG;
break;
default:
/* other error */
zend_string_free(out_buf);
return PHP_ICONV_ERR_UNKNOWN;
}
}
*out_p = '\0';
ZSTR_LEN(out_buf) = out_size;
*out = out_buf;
return retval;
#endif
}
/* }}} */
/* {{{ _php_iconv_strlen() */
static php_iconv_err_t _php_iconv_strlen(size_t *pretval, const char *str, size_t nbytes, const char *enc)
{
char buf[GENERIC_SUPERSET_NBYTES*2];
php_iconv_err_t err = PHP_ICONV_ERR_SUCCESS;
iconv_t cd;
const char *in_p;
size_t in_left;
char *out_p;
size_t out_left;
size_t cnt;
*pretval = (size_t)-1;
cd = iconv_open(GENERIC_SUPERSET_NAME, enc);
if (cd == (iconv_t)(-1)) {
#if ICONV_SUPPORTS_ERRNO
if (errno == EINVAL) {
return PHP_ICONV_ERR_WRONG_CHARSET;
} else {
return PHP_ICONV_ERR_CONVERTER;
}
#else
return PHP_ICONV_ERR_UNKNOWN;
#endif
}
errno = 0;
out_left = 0;
for (in_p = str, in_left = nbytes, cnt = 0; in_left > 0; cnt+=2) {
size_t prev_in_left;
out_p = buf;
out_left = sizeof(buf);
prev_in_left = in_left;
if (iconv(cd, (char **)&in_p, &in_left, (char **) &out_p, &out_left) == (size_t)-1) {
if (prev_in_left == in_left) {
break;
}
}
}
if (out_left > 0) {
cnt -= out_left / GENERIC_SUPERSET_NBYTES;
}
#if ICONV_SUPPORTS_ERRNO
switch (errno) {
case EINVAL:
err = PHP_ICONV_ERR_ILLEGAL_CHAR;
break;
case EILSEQ:
err = PHP_ICONV_ERR_ILLEGAL_SEQ;
break;
case E2BIG:
case 0:
*pretval = cnt;
break;
default:
err = PHP_ICONV_ERR_UNKNOWN;
break;
}
#else
*pretval = cnt;
#endif
iconv_close(cd);
return err;
}
/* }}} */
/* {{{ _php_iconv_substr() */
static php_iconv_err_t _php_iconv_substr(smart_str *pretval,
const char *str, size_t nbytes, zend_long offset, zend_long len, const char *enc)
{
char buf[GENERIC_SUPERSET_NBYTES];
php_iconv_err_t err = PHP_ICONV_ERR_SUCCESS;
iconv_t cd1, cd2;
const char *in_p;
size_t in_left;
char *out_p;
size_t out_left;
size_t cnt;
size_t total_len;
err = _php_iconv_strlen(&total_len, str, nbytes, enc);
if (err != PHP_ICONV_ERR_SUCCESS) {
return err;
}
if (len < 0) {
if ((len += (total_len - offset)) < 0) {
return PHP_ICONV_ERR_SUCCESS;
}
}
if (offset < 0) {
if ((offset += total_len) < 0) {
return PHP_ICONV_ERR_SUCCESS;
}
}
if((size_t)len > total_len) {
len = total_len;
}
if ((size_t)offset > total_len) {
return PHP_ICONV_ERR_SUCCESS;
}
if ((size_t)(offset + len) > total_len ) {
/* trying to compute the length */
len = total_len - offset;
}
if (len == 0) {
smart_str_appendl(pretval, "", 0);
smart_str_0(pretval);
return PHP_ICONV_ERR_SUCCESS;
}
cd1 = iconv_open(GENERIC_SUPERSET_NAME, enc);
if (cd1 == (iconv_t)(-1)) {
#if ICONV_SUPPORTS_ERRNO
if (errno == EINVAL) {
return PHP_ICONV_ERR_WRONG_CHARSET;
} else {
return PHP_ICONV_ERR_CONVERTER;
}
#else
return PHP_ICONV_ERR_UNKNOWN;
#endif
}
cd2 = (iconv_t)NULL;
errno = 0;
for (in_p = str, in_left = nbytes, cnt = 0; in_left > 0 && len > 0; ++cnt) {
size_t prev_in_left;
out_p = buf;
out_left = sizeof(buf);
prev_in_left = in_left;
if (iconv(cd1, (char **)&in_p, &in_left, (char **) &out_p, &out_left) == (size_t)-1) {
if (prev_in_left == in_left) {
break;
}
}
if ((zend_long)cnt >= offset) {
if (cd2 == (iconv_t)NULL) {
cd2 = iconv_open(enc, GENERIC_SUPERSET_NAME);
if (cd2 == (iconv_t)(-1)) {
cd2 = (iconv_t)NULL;
#if ICONV_SUPPORTS_ERRNO
if (errno == EINVAL) {
err = PHP_ICONV_ERR_WRONG_CHARSET;
} else {
err = PHP_ICONV_ERR_CONVERTER;
}
#else
err = PHP_ICONV_ERR_UNKNOWN;
#endif
break;
}
}
if (_php_iconv_appendl(pretval, buf, sizeof(buf), cd2) != PHP_ICONV_ERR_SUCCESS) {
break;
}
--len;
}
}
#if ICONV_SUPPORTS_ERRNO
switch (errno) {
case EINVAL:
err = PHP_ICONV_ERR_ILLEGAL_CHAR;
break;
case EILSEQ:
err = PHP_ICONV_ERR_ILLEGAL_SEQ;
break;
case E2BIG:
break;
}
#endif
if (err == PHP_ICONV_ERR_SUCCESS) {
if (cd2 != (iconv_t)NULL) {
_php_iconv_appendl(pretval, NULL, 0, cd2);
}
smart_str_0(pretval);
}
if (cd1 != (iconv_t)NULL) {
iconv_close(cd1);
}
if (cd2 != (iconv_t)NULL) {
iconv_close(cd2);
}
return err;
}
/* }}} */
/* {{{ _php_iconv_strpos() */
static php_iconv_err_t _php_iconv_strpos(size_t *pretval,
const char *haystk, size_t haystk_nbytes,
const char *ndl, size_t ndl_nbytes,
zend_long offset, const char *enc)
{
char buf[GENERIC_SUPERSET_NBYTES];
php_iconv_err_t err = PHP_ICONV_ERR_SUCCESS;
iconv_t cd;
const char *in_p;
size_t in_left;
char *out_p;
size_t out_left;
size_t cnt;
zend_string *ndl_buf;
const char *ndl_buf_p;
size_t ndl_buf_left;
size_t match_ofs;
*pretval = (size_t)-1;
err = php_iconv_string(ndl, ndl_nbytes, &ndl_buf, GENERIC_SUPERSET_NAME, enc);
if (err != PHP_ICONV_ERR_SUCCESS) {
if (ndl_buf != NULL) {
zend_string_free(ndl_buf);
}
return err;
}
cd = iconv_open(GENERIC_SUPERSET_NAME, enc);
if (cd == (iconv_t)(-1)) {
if (ndl_buf != NULL) {
zend_string_free(ndl_buf);
}
#if ICONV_SUPPORTS_ERRNO
if (errno == EINVAL) {