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descriptors refactor: Clarify multipath data relationships through local struct

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Hodlinator 2025-03-28 11:40:59 +01:00
parent 7e974f474e
commit 56f271e9b9
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1 changed files with 12 additions and 8 deletions
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20
src/script/descriptor.cpp
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@ -1440,8 +1440,11 @@ std::optional<uint32_t> ParseKeyPathNum(std::span<const char> elem, bool& apostr
[[nodiscard]] bool ParseKeyPath(const std::vector<std::span<const char>>& split, std::vector<KeyPath>& out, bool& apostrophe, std::string& error, bool allow_multipath)
{
KeyPath path;
std::optional<size_t> multipath_segment_index;
std::vector<uint32_t> multipath_values;
struct MultipathSubstitutes {
size_t placeholder_index;
std::vector<uint32_t> values;
};
std::optional<MultipathSubstitutes> substitutes;
for (size_t i = 1; i < split.size(); ++i) {
const std::span<const char>& elem = split[i];
@ -1452,7 +1455,7 @@ std::optional<uint32_t> ParseKeyPathNum(std::span<const char> elem, bool& apostr
error = strprintf("Key path value '%s' specifies multipath in a section where multipath is not allowed", std::string(elem.begin(), elem.end()));
return false;
}
if (multipath_segment_index) {
if (substitutes) {
error = "Multiple multipath key path specifiers found";
return false;
}
@ -1464,6 +1467,7 @@ std::optional<uint32_t> ParseKeyPathNum(std::span<const char> elem, bool& apostr
return false;
}
substitutes.emplace();
std::unordered_set<uint32_t> seen_substitutes;
for (const auto& num : nums) {
const auto& op_num = ParseKeyPathNum(num, apostrophe, error);
@ -1473,11 +1477,11 @@ std::optional<uint32_t> ParseKeyPathNum(std::span<const char> elem, bool& apostr
error = strprintf("Duplicated key path value %u in multipath specifier", *op_num);
return false;
}
multipath_values.emplace_back(*op_num);
substitutes->values.emplace_back(*op_num);
}
path.emplace_back(); // Placeholder for multipath segment
multipath_segment_index = path.size()-1;
substitutes->placeholder_index = path.size() - 1;
} else {
const auto& op_num = ParseKeyPathNum(elem, apostrophe, error);
if (!op_num) return false;
@ -1485,13 +1489,13 @@ std::optional<uint32_t> ParseKeyPathNum(std::span<const char> elem, bool& apostr
}
}
if (!multipath_segment_index) {
if (!substitutes) {
out.emplace_back(std::move(path));
} else {
// Replace the multipath placeholder with each value while generating paths
for (uint32_t substitute : multipath_values) {
for (uint32_t substitute : substitutes->values) {
KeyPath branch_path = path;
branch_path[*multipath_segment_index] = substitute;
branch_path[substitutes->placeholder_index] = substitute;
out.emplace_back(std::move(branch_path));
}
}