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#include "util.h"
#include <util/string/ascii.h>
namespace {
void ToSnakeCaseImpl(TString* const name, std::function<bool(const char)> requiresUnderscore) {
bool requiresChanges = false;
size_t size = name->size();
for (size_t i = 0; i < name->size(); i++) {
if (IsAsciiUpper(name->at(i))) {
requiresChanges = true;
if (i > 0 && requiresUnderscore(name->at(i - 1))) {
size++;
}
}
}
if (!requiresChanges) {
return;
}
if (size != name->size()) {
TString result;
result.reserve(size);
for (size_t i = 0; i < name->size(); i++) {
const char c = name->at(i);
if (IsAsciiUpper(c)) {
if (i > 0 && requiresUnderscore(name->at(i - 1))) {
result += '_';
}
result += AsciiToLower(c);
} else {
result += c;
}
}
*name = std::move(result);
} else {
name->to_lower();
}
}
}
namespace NProtobufJson {
void ToSnakeCase(TString* const name) {
ToSnakeCaseImpl(name, [](const char prev) { return prev != '_'; });
}
void ToSnakeCaseDense(TString* const name) {
ToSnakeCaseImpl(name, [](const char prev) { return prev != '_' && !IsAsciiUpper(prev); });
}
bool EqualsIgnoringCaseAndUnderscores(TStringBuf s1, TStringBuf s2) {
size_t i1 = 0, i2 = 0;
while (i1 < s1.size() && i2 < s2.size()) {
if (s1[i1] == '_') {
++i1;
} else if (s2[i2] == '_') {
++i2;
} else if (AsciiToUpper(s1[i1]) != AsciiToUpper(s2[i2])) {
return false;
} else {
++i1, ++i2;
}
}
while (i1 < s1.size() && s1[i1] == '_') {
++i1;
}
while (i2 < s2.size() && s2[i2] == '_') {
++i2;
}
return (i1 == s1.size() && i2 == s2.size());
}
}
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