75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
#include "glacier/string/string_view.h"
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namespace glcr {
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namespace {
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uint64_t cstrlen(const char* ptr) {
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uint64_t len = 0;
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while (ptr[len] != '\0') {
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len++;
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}
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return len;
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}
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} // namespace
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StringView::StringView() {}
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StringView::StringView(const char* str) : value_(str), size_(cstrlen(str)) {}
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StringView::StringView(const char* str, uint64_t count)
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: value_(str), size_(count) {}
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const char* StringView::data() const { return value_; }
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uint64_t StringView::size() const { return size_; }
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bool StringView::empty() const { return size_ == 0; }
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char StringView::at(uint64_t pos) const { return value_[pos]; }
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char StringView::operator[](uint64_t pos) const { return at(pos); };
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uint64_t StringView::find(char c, uint64_t pos) const {
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for (uint64_t i = pos; i < size_; i++) {
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if (value_[i] == c) {
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return i;
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}
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}
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return npos;
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}
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StringView StringView::substr(uint64_t start, uint64_t count) const {
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// FIXME: Report an error here maybe.
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if (start >= size_) {
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return StringView{};
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}
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if (start + count > size_) {
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count = size_ - start;
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}
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return StringView(value_ + start, count);
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}
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bool operator==(const StringView& str1, const StringView& str2) {
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if (str1.empty() && str2.empty()) {
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return true;
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}
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if (str1.size() != str2.size()) {
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return false;
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}
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if (str1.data() == str2.data()) {
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// Short circuit if they are the same exact string.
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return true;
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}
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for (uint64_t i = 0; i < str1.size(); i++) {
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if (str1.at(i) != str2.at(i)) {
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return false;
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}
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}
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return true;
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}
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bool operator!=(const StringView& str1, const StringView& str2) {
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return !(str1 == str2);
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}
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} // namespace glcr
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