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#include "swift/Basic/PrefixMap.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include <map>
#include <random>
#include <string>
const unsigned RandomSpread = 26000;
using namespace swift;
namespace {
struct Tester {
std::map<std::string, int> StdMap;
PrefixMap<char, int> PreMap;
Tester() {
assert(PreMap.empty());
}
static ArrayRef<char> asArray(StringRef str) {
return ArrayRef<char>(str.begin(), str.end());
}
static StringRef asString(ArrayRef<char> str) {
return StringRef(str.begin(), str.size());
}
void insert(StringRef key, int value) {
auto stdmapResult = StdMap.insert({key, value});
auto premapResult = PreMap.insert(asArray(key), value);
assert(stdmapResult.second == premapResult.second);
if (premapResult.second) {
assert(value == *premapResult.first);
}
}
void find(StringRef key) {
auto stdmapResult = StdMap.lower_bound(key);
while (stdmapResult == StdMap.end() ||
!key.startswith(stdmapResult->first)) {
if (stdmapResult == StdMap.begin()) {
stdmapResult = StdMap.end();
break;
}
--stdmapResult;
}
bool hasStdmapEntry = (stdmapResult != StdMap.end());
auto premapResult = PreMap.findPrefix(asArray(key));
assert(hasStdmapEntry == bool(premapResult.first));
if (!hasStdmapEntry) return;
assert(key.startswith(stdmapResult->first));
auto stdmapValue = stdmapResult->second;
assert(stdmapValue == *premapResult.first);
assert(premapResult.second == key.begin() + stdmapResult->first.size());
}
void clear() {
StdMap.clear();
PreMap.clear();
assert(PreMap.empty());
assert(PreMap.size() == 0);
}
void validate() {
assert(StdMap.empty() == PreMap.empty());
assert(StdMap.size() == PreMap.size());
auto si = StdMap.begin(), se = StdMap.end();
auto pi = PreMap.begin(), pe = PreMap.end();
while (true) {
if (si == se) {
assert(pi == pe);
return;
}
assert(pi != pe);
assert(si->second == (*pi).getValue());
llvm::SmallString<128> buffer;
assert(StringRef(si->first) == asString((*pi).getKey(buffer)));
++si;
++pi;
}
}
void dump() {
llvm::outs() << "StdMap:\n";
for (auto i = StdMap.begin(), e = StdMap.end(); i != e; ++i) {
llvm::outs() << " \"" << i->first << "\": " << i->second << "\n";
}
llvm::outs() << "PreMap:\n";
for (auto i = PreMap.begin(), e = PreMap.end(); i != e; ++i) {
llvm::SmallVector<char, 128> buffer;
(*i).getKey(buffer);
llvm::outs() << " \"" << buffer << "\": " << (*i).getValue() << "\n";
}
PreMap.dump();
}
};
}
int main(int argc, char **argv) {
std::random_device randomDevice; // used for seeding
std::default_random_engine generator(randomDevice());
std::uniform_int_distribution<unsigned> distribution(0,RandomSpread);
Tester tester;
if (argc < 0) tester.dump(); // force this to be used
auto next = [&] { return distribution(generator); };
llvm::SmallString<128> key;
while (true) {
auto operation = next();
// Add elements to key.
if (operation <= .15 * RandomSpread) {
unsigned n = next() % 1 ? 5 : 7;
for (unsigned i = 0; i != n; ++i)
key.push_back('a' + (next() % 26));
// Remove elements from key.
} else if (operation <= .3 * RandomSpread) {
unsigned n = next() % 1 ? 5 : 7;
for (unsigned i = 0; i != n; ++i)
if (!key.empty()) key.pop_back();
// Insert.
} else if (operation <= .7 * RandomSpread) {
unsigned value = next();
llvm::outs() << " tester.insert(\"" << key << "\", " << value << ");\n";
tester.insert(key, value);
// Find.
} else if (operation <= .98 * RandomSpread) {
llvm::outs() << " tester.find(\"" << key << "\");\n";
tester.find(key);
// Clear.
} else {
llvm::outs() << " tester.clear();\n";
tester.clear();
}
llvm::outs() << " tester.validate();\n";
tester.validate();
}
}
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