78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <string.h>
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#include <AStringUtils.h>
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namespace android {
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// static
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int AStringUtils::Compare(const char *a, const char *b, size_t len, bool ignoreCase) {
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// this method relies on a trailing '\0' if a or b are shorter than len
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return ignoreCase ? strncasecmp(a, b, len) : strncmp(a, b, len);
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}
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// static
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bool AStringUtils::MatchesGlob(
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const char *glob, size_t globLen, const char *str, size_t strLen, bool ignoreCase) {
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// this method does not assume a trailing '\0'
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size_t ix = 0, globIx = 0;
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// pattern must match until first '*'
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while (globIx < globLen && glob[globIx] != '*') {
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++globIx;
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}
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if (strLen < globIx || Compare(str, glob, globIx /* len */, ignoreCase)) {
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return false;
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}
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ix = globIx;
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// process by * separated sections
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while (globIx < globLen) {
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++globIx;
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size_t start = globIx;
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while (globIx < globLen && glob[globIx] != '*') {
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++globIx;
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}
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size_t len = globIx - start;
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const char *pattern = glob + start;
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if (globIx == globLen) {
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// last pattern must match tail
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if (ix + len > strLen) {
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return false;
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}
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const char *tail = str + strLen - len;
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return !Compare(tail, pattern, len, ignoreCase);
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}
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// progress after first occurrence of pattern
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while (ix + len <= strLen && Compare(str + ix, pattern, len, ignoreCase)) {
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++ix;
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}
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if (ix + len > strLen) {
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return false;
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}
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ix += len;
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// we will loop around as globIx < globLen
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}
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// we only get here if there were no * in the pattern
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return ix == strLen;
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}
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} // namespace android
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