50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
#include <cstdio>
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#include <algorithm>
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#include "pugixml_util.hpp"
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#include "pugixml_loc.hpp"
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namespace pugiutil {
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//Return the line number from the given offset
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std::size_t loc_data::line(std::ptrdiff_t offset) const {
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auto it = std::lower_bound(offsets_.begin(), offsets_.end(), offset);
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std::size_t index = it - offsets_.begin();
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return 1 + index;
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}
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//Return the column number from the given offset
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std::size_t loc_data::col(std::ptrdiff_t offset) const {
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auto it = std::lower_bound(offsets_.begin(), offsets_.end(), offset);
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std::size_t index = it - offsets_.begin();
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return index == 0 ? offset + 1 : offset - offsets_[index - 1];
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}
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void loc_data::build_loc_data() {
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FILE* f = fopen(filename_.c_str(), "rb");
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if (f == nullptr) {
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throw XmlError("Failed to open file", filename_);
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}
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std::ptrdiff_t offset = 0;
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char buffer[1024];
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std::size_t size;
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while ((size = fread(buffer, 1, sizeof(buffer), f)) > 0) {
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for (std::size_t i = 0; i < size; ++i) {
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if (buffer[i] == '\n') {
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offsets_.push_back(offset + i);
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}
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}
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offset += size;
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}
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fclose(f);
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}
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} // namespace pugiutil
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