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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "bub_sysdeps.h"
#include <stdio.h>
int utf8_to_ucs2(const uint8_t* utf8_data,
size_t utf8_num_bytes,
uint16_t* ucs2_data,
size_t ucs2_data_capacity_num_bytes) {
uint32_t i8 = 0;
uint32_t i2 = 0;
do {
// cannot represent this character, too long
if ((utf8_data[i8] & 0xF8) == 0xF0)
return 1;
else if ((utf8_data[i8] & 0xF0) == 0xE0) {
ucs2_data[i2] = (uint16_t)((uint16_t)utf8_data[i8] << 12) |
(uint16_t)(((uint16_t)utf8_data[i8 + 1] << 6) & 0x0FC0) |
(uint16_t)((uint16_t)utf8_data[i8 + 2 ] & 0x003F);
i8 += 3;
}
else if ((utf8_data[i8] & 0xE0) == 0XC0) {
ucs2_data[i2] = (uint16_t)(((uint16_t)utf8_data[i8] << 6) & 0x07C0) |
(uint16_t)((uint16_t)utf8_data[i8 + 1] & 0x003F);
i8 += 2;
}
else if (!(utf8_data[i8] >> 7)) {
ucs2_data[i2] = (uint16_t)((uint16_t)utf8_data[i8] & 0x00FF);
i8++;
}
// invalid utf-8
else
return 1;
i2++;
} while (i8 < utf8_num_bytes - 1);
return 0;
}
void* bub_calloc(size_t size) {
void *x = bub_malloc_(size);
if (x != NULL)
bub_memset(x, 0, size);
return x;
}
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