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/*
* Copyright (c) 2018-2020, Andreas Kling <awesomekling@gmail.com>
* Copyright (c) 2020, Fei Wu <f.eiwu@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/String.h>
#include <AK/StringUtils.h>
#include <AK/StringView.h>
namespace AK {
namespace StringUtils {
bool matches(const StringView& str, const StringView& mask, CaseSensitivity case_sensitivity)
{
if (str.is_null() || mask.is_null())
return str.is_null() && mask.is_null();
if (case_sensitivity == CaseSensitivity::CaseInsensitive) {
const String str_lower = String(str).to_lowercase();
const String mask_lower = String(mask).to_lowercase();
return matches(str_lower, mask_lower, CaseSensitivity::CaseSensitive);
}
const char* string_ptr = str.characters_without_null_termination();
const char* string_end = string_ptr + str.length();
const char* mask_ptr = mask.characters_without_null_termination();
const char* mask_end = mask_ptr + mask.length();
// Match string against mask directly unless we hit a *
while ((string_ptr < string_end) && (mask_ptr < mask_end) && (*mask_ptr != '*')) {
if ((*mask_ptr != *string_ptr) && (*mask_ptr != '?'))
return false;
mask_ptr++;
string_ptr++;
}
const char* cp = nullptr;
const char* mp = nullptr;
while (string_ptr < string_end) {
if ((mask_ptr < mask_end) && (*mask_ptr == '*')) {
// If we have only a * left, there is no way to not match.
if (++mask_ptr == mask_end)
return true;
mp = mask_ptr;
cp = string_ptr + 1;
} else if ((mask_ptr < mask_end) && ((*mask_ptr == *string_ptr) || (*mask_ptr == '?'))) {
mask_ptr++;
string_ptr++;
} else if ((cp != nullptr) && (mp != nullptr)) {
mask_ptr = mp;
string_ptr = cp++;
} else {
break;
}
}
// Handle any trailing mask
while ((mask_ptr < mask_end) && (*mask_ptr == '*'))
mask_ptr++;
// If we 'ate' all of the mask and the string then we match.
return (mask_ptr == mask_end) && string_ptr == string_end;
}
int convert_to_int(const StringView& str, bool& ok)
{
if (str.is_empty()) {
ok = false;
return 0;
}
bool negative = false;
size_t i = 0;
const auto characters = str.characters_without_null_termination();
if (characters[0] == '-' || characters[0] == '+') {
if (str.length() == 1) {
ok = false;
return 0;
}
i++;
negative = (characters[0] == '-');
}
int value = 0;
for (; i < str.length(); i++) {
if (characters[i] < '0' || characters[i] > '9') {
ok = false;
return 0;
}
value = value * 10;
value += characters[i] - '0';
}
ok = true;
return negative ? -value : value;
}
unsigned convert_to_uint(const StringView& str, bool& ok)
{
if (str.is_empty()) {
ok = false;
return 0;
}
unsigned value = 0;
const auto characters = str.characters_without_null_termination();
for (size_t i = 0; i < str.length(); i++) {
if (characters[i] < '0' || characters[i] > '9') {
ok = false;
return 0;
}
value = value * 10;
value += characters[i] - '0';
}
ok = true;
return value;
}
static inline char to_lowercase(char c)
{
if (c >= 'A' && c <= 'Z')
return c | 0x20;
return c;
}
bool equals_ignoring_case(const StringView& a, const StringView& b)
{
if (a.impl() && a.impl() == b.impl())
return true;
if (a.length() != b.length())
return false;
for (size_t i = 0; i < a.length(); ++i) {
if (to_lowercase(a.characters_without_null_termination()[i]) != to_lowercase(b.characters_without_null_termination()[i]))
return false;
}
return true;
}
}
}
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