134 lines
3.9 KiB
Plaintext
134 lines
3.9 KiB
Plaintext
// Copyright (c) 2007, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// SimpleStringDictionary.mm
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// Simple string dictionary that does not allocate memory
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//
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#include <assert.h>
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#import "SimpleStringDictionary.h"
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namespace google_breakpad {
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//==============================================================================
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const KeyValueEntry *SimpleStringDictionary::GetEntry(int i) const {
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return (i >= 0 && i < MAX_NUM_ENTRIES) ? &entries_[i] : NULL;
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}
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//==============================================================================
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int SimpleStringDictionary::GetCount() const {
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int count = 0;
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for (int i = 0; i < MAX_NUM_ENTRIES; ++i) {
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if (entries_[i].IsActive() ) {
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++count;
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}
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}
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return count;
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}
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//==============================================================================
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const char *SimpleStringDictionary::GetValueForKey(const char *key) {
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assert(key);
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if (!key)
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return NULL;
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for (int i = 0; i < MAX_NUM_ENTRIES; ++i) {
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KeyValueEntry &entry = entries_[i];
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if (entry.IsActive() && !strcmp(entry.GetKey(), key)) {
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return entry.GetValue();
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}
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}
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return NULL;
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}
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//==============================================================================
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void SimpleStringDictionary::SetKeyValue(const char *key,
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const char *value) {
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if (!value) {
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RemoveKey(key);
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return;
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}
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// key must not be NULL
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assert(key);
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if (!key)
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return;
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// key must not be empty string
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assert(key[0] != '\0');
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if (key[0] == '\0')
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return;
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int free_index = -1;
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// check if key already exists
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for (int i = 0; i < MAX_NUM_ENTRIES; ++i) {
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KeyValueEntry &entry = entries_[i];
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if (entry.IsActive()) {
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if (!strcmp(entry.GetKey(), key)) {
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entry.SetValue(value);
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return;
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}
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} else {
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// Make a note of an empty slot
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if (free_index == -1) {
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free_index = i;
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}
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}
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}
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// check if we've run out of space
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assert(free_index != -1);
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// Put new key into an empty slot (if found)
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if (free_index != -1) {
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entries_[free_index].SetKeyValue(key, value);
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}
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}
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//==============================================================================
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void SimpleStringDictionary::RemoveKey(const char *key) {
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assert(key);
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if (!key)
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return;
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for (int i = 0; i < MAX_NUM_ENTRIES; ++i) {
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if (!strcmp(entries_[i].GetKey(), key)) {
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entries_[i].Clear();
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return;
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}
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}
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}
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} // namespace google_breakpad
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