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44fa68b064
* ext/intl: intl_CharFromString using zend_string_truncate to adjust the size of the buffer.
87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
/*
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Gustavo Lopes <cataphract@php.net> |
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+----------------------------------------------------------------------+
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*/
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#include "intl_cppshims.h"
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#include "intl_convertcpp.h"
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#include <unicode/ustring.h>
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extern "C" {
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#include <php.h>
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}
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/* {{{ intl_stringFromChar */
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int intl_stringFromChar(UnicodeString &ret, char *str, size_t str_len, UErrorCode *status)
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{
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if(UNEXPECTED(str_len > INT32_MAX)) {
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*status = U_BUFFER_OVERFLOW_ERROR;
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ret.setToBogus();
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return FAILURE;
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}
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//the number of UTF-16 code units is not larger than that of UTF-8 code
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//units, + 1 for the terminator
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int32_t capacity = (int32_t)str_len + 1;
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//no check necessary -- if NULL will fail ahead
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UChar *utf16 = ret.getBuffer(capacity);
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int32_t utf16_len = 0;
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*status = U_ZERO_ERROR;
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u_strFromUTF8WithSub(utf16, ret.getCapacity(), &utf16_len,
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str, str_len, U_SENTINEL /* no substitution */, NULL,
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status);
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ret.releaseBuffer(utf16_len);
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if (U_FAILURE(*status)) {
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ret.setToBogus();
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return FAILURE;
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}
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return SUCCESS;
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}
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/* }}} */
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/* {{{ intl_charFromString
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* faster than doing intl_convert_utf16_to_utf8(
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* from.getBuffer(), from.length(), &status),
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* but consumes more memory */
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zend_string* intl_charFromString(const UnicodeString &from, UErrorCode *status)
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{
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zend_string *u8res;
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if (UNEXPECTED(from.isBogus())) {
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return NULL;
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}
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//the number of UTF-8 code units is not larger than that of UTF-16 code
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//units * 3
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int32_t capacity = from.length() * 3;
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if (from.isEmpty()) {
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return ZSTR_EMPTY_ALLOC();
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}
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u8res = zend_string_alloc(capacity, 0);
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const UChar *utf16buf = from.getBuffer();
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int32_t actual_len;
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u_strToUTF8WithSub(ZSTR_VAL(u8res), capacity, &actual_len, utf16buf, from.length(),
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U_SENTINEL, NULL, status);
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if (U_FAILURE(*status)) {
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zend_string_free(u8res);
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return NULL;
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}
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u8res = zend_string_truncate(u8res, actual_len, 0);
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return u8res;
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}
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/* }}} */
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