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EtchUtil.cpp
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77 lines (69 loc) · 1.95 KB
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/* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you 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 "util/EtchUtil.h"
status_t etch_strcpy_s(char *dst, size_t dstSize, const char *src) {
char *d, *end;
if (dst == NULL || src == NULL) {
return ETCH_EINVAL;
}
if (dstSize == 0) {
return ETCH_ERANGE;
}
d = dst;
end = dst + dstSize - 1;
for (; d < end; ++d, ++src) {
if (!(*d = *src)) {
return ETCH_OK;
}
}
// if src buffer is not 0 now, then we have bytes left in src --> error
if (!(*d = *src)) {
return ETCH_OK;
} else {
// always null terminate
*d = '\0';
return ETCH_EINVAL;
}
}
status_t etch_strlen_utf8(const char *src, capu::uint32_t &length) {
if (src == NULL)
return ETCH_EINVAL;
length = 0;
for (capu::int32_t i = 0; src[i] != 0;) {
if (!(src[i] & (0x80))) {
//1 byte character
i++;
length++;
} else if ((src[i] & (0xF0)) == 0xF0) {
//4 byte character
i = i + 4;
length++;
} else if ((src[i] & (0xE0)) == 0xE0) {
//3 byte character
i = i + 3;
length++;
} else if ((src[i] & (0xC0)) == 0xC0) {
//2 byte character
i = i + 2;
length++;
} else {
return ETCH_ERROR;
}
}
return ETCH_OK;
}