xref: /base/global/i18n_lite/frameworks/i18n/src/str_util.cpp

/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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 "str_util.h"
#include "i18n_memory_adapter.h"
#include "securec.h"
#include "types.h"

namespace OHOS {
namespace I18N {
static int g_i18nMaxMalloc = 4096;

int ReplaceAndCountOff(std::string &content, const int index, const char *sign, const int off)
{
    if ((sign == nullptr) || (index < 0) || (static_cast<unsigned int>(index) > strlen(content.data()))) {
        return off;
    }
    content = content.replace(index, 1, sign);
    int signLen = strlen(sign);
    return off + signLen - 1;
}

void ArrayCopy(std::string *target, const int targetSize, const std::string *source, const int sourceSize)
{
    if (target == nullptr || source == nullptr || (sourceSize > targetSize)) {
        return;
    }
    for (int i = 0; i < sourceSize; i++) {
        target[i] = source[i];
    }
}

char *NewArrayAndCopy(const char *source, const int len)
{
    if ((source == nullptr) || (len <= 0) || (len > g_i18nMaxMalloc)) { // 4096 is the max size that we could use
        return nullptr;
    }
    char *out = reinterpret_cast<char *>(I18nMalloc(len + 1));
    if (out == nullptr) {
        return nullptr;
    }
    errno_t rc = strcpy_s(out, len + 1, source);
    if (rc != EOK) {
        I18nFree(static_cast<void *>(out));
        return nullptr;
    }
    out[len] = '\0';
    return out;
}

char *I18nNewCharString(const char *source, const int len)
{
    if ((source == nullptr) || (len <= 0) || len > g_i18nMaxMalloc) { // 4096 is the max size of allocation
        return nullptr;
    }
    char *out = reinterpret_cast<char *>(I18nMalloc(len + 1));
    if (out == nullptr) {
        return nullptr;
    }
    errno_t rc = memcpy_s(out, len + 1, source, len);
    if (rc != EOK) {
        I18nFree(static_cast<void *>(out));
        return nullptr;
    }
    out[len] = '\0';
    return out;
}

bool CleanCharArray(char *target, const int len)
{
    errno_t ret = memset_s(target, len, 0, len);
    if (ret != EOK) {
        return false;
    }
    return true;
}

int LenCharArray(const char *target)
{
    if (target == nullptr) {
        return 0;
    }
    return strlen(target);
}

void Split(const std::string &src, std::string *dst, const int32_t size, const char &sep)
{
    if (dst == nullptr || size <= 0) {
        return;
    }
    int32_t current = 0;

    std::string::size_type begin = 0;
    std::string::size_type end = 0;
    std::string::size_type srcSize = src.size();
    while (current < size) {
        while ((end < srcSize) && (src[end] != sep)) {
            ++end;
        }
        if (end >= srcSize) {
            break;
        }
        dst[current++] = std::string(src, begin, end - begin);
        ++end; // pass the sep
        begin = end;
    }
    if (current < size && end > begin) {
        dst[current++] = std::string(src, begin, end - begin);
    }
}

bool CompareLocaleItem(const char *item, const char *other)
{
    if ((item == nullptr) && (other == nullptr)) {
        return true;
    }
    if ((item != nullptr) && (other != nullptr) && (strcmp(item, other) == 0)) {
        return true;
    }
    return false;
}

/**
 * split str with "_"
 */
std::string Parse(const char *str, int32_t count)
{
    if (str == nullptr || count < 0) {
        return "";
    }
    size_t length = strlen(str);
    if (length == 0 || length > I18N_STRING_LENGTH_MAX) {
        return "";
    }
    int32_t tempCount = 0;
    size_t ind = 0;
    while ((ind < length) && (tempCount < count)) {
        if (str[ind] == '_') {
            ++tempCount;
        }
        ++ind;
    }
    if (tempCount < count) {
        return "";
    }
    size_t last = ind;
    while (last < length) {
        if (str[last] == '_') {
            break;
        }
        ++last;
    }
    if (last == ind) {
        return "";
    }
    return std::string(str + ind, last - ind);
}
} // namespace I18N
} // namespace OHOS