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orthography.cc
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orthography.cc
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//---------------------------------------------------------------------------
#include "orthography.h"
#include "console.h"
#include "crc.h"
#include "mem.h"
#include "str.h"
#include "unicode.h"
#include "utf8_pointer.h"
#include "word_list.h"
//---------------------------------------------------------------------------
const size_t MAXIMUM_CACHEABLE_WORD_LENGTH = 64;
//---------------------------------------------------------------------------
class StenoCompiledOrthography::BestCandidate {
public:
void Add(char *newCandidate, int score);
char *GetResult() const { return candidate; }
bool IsEmpty() const { return candidate == nullptr; }
bool IsNotEmpty() const { return candidate != nullptr; }
static const int NOT_IN_WORD_LIST_SCORE = WordList::MAX_SCORE + 1;
static const int FALLBACK_SCORE = WordList::MAX_SCORE + 2;
static const int EXCLUDE_WORD_SCORE = WordList::MAX_SCORE + 4;
private:
char *candidate = nullptr;
int score = WordList::MAX_SCORE + 3;
};
void StenoCompiledOrthography::BestCandidate::Add(char *newCandidate,
int newScore) {
char *unused;
if (newScore < score) {
unused = candidate;
candidate = newCandidate;
score = newScore;
} else {
unused = newCandidate;
}
free(unused);
}
//---------------------------------------------------------------------------
#if USE_ORTHOGRAPHY_CACHE
#define RECORD_ORTHOGRAPHY_CACHE_STATS 0
#if RUN_TESTS
void StenoCompiledOrthography::LockCache() {}
void StenoCompiledOrthography::UnlockCache() {}
#endif
inline char *StenoCompiledOrthography::CacheEntry::DupResult() const {
return Str::DupN(GetResult(), resultLength);
}
void StenoCompiledOrthography::CacheEntry::Set(const char *word,
const char *suffix,
const char *result) {
free(base);
const size_t wordLength = Str::Length(word);
const size_t suffixLength = Str::Length(suffix);
const size_t resultLength = Str::Length(result);
this->resultLength = resultLength;
base = (char *)malloc(wordLength + suffixLength + resultLength + 3);
char *p = base;
memcpy(p, word, wordLength + 1);
p += wordLength + 1;
suffixOffset = p - base;
memcpy(p, suffix, suffixLength + 1);
p += suffixLength + 1;
resultOffset = p - base;
memcpy(p, result, resultLength + 1);
}
bool StenoCompiledOrthography::CacheEntry::IsEqual(const char *word,
const char *suffix) const {
return base != nullptr && Str::Eq(word, GetWord()) &&
Str::Eq(suffix, GetSuffix());
}
char *StenoCompiledOrthography::CacheBlock::Lookup(const char *word,
const char *suffix) const {
LockCache();
for (size_t i = 0; i < CACHE_ASSOCIATIVITY; ++i) {
const CacheEntry &entry = entries[i];
if (entry.IsEqual(word, suffix)) {
char *result = entry.DupResult();
UnlockCache();
return result;
}
}
UnlockCache();
return nullptr;
}
void StenoCompiledOrthography::CacheBlock::AddEntry(const char *word,
const char *suffix,
const char *result) {
LockCache();
const size_t entryIndex = entries[0].blockIndex++ & (CACHE_ASSOCIATIVITY - 1);
CacheEntry &entry = entries[entryIndex];
entry.Set(word, suffix, result);
UnlockCache();
}
#endif
//---------------------------------------------------------------------------
constexpr StenoOrthography StenoOrthography::emptyOrthography = {
.rules = {0, nullptr},
.aliases = {0, nullptr},
.autoSuffixes = {0, nullptr},
.reverseAutoSuffixes = {0, nullptr},
};
//---------------------------------------------------------------------------
void StenoOrthography::Print() const {
Console::Printf("{"
"\n\t\"rules\": [");
for (size_t i = 0; i < rules.GetCount(); ++i) {
if (i != 0) {
Console::Printf(",");
}
Console::Printf("\n\t\t{"
"\n\t\t\t\"pattern\": \"%J\","
"\n\t\t\t\"replacement\": \"%J\""
"\n\t\t}",
rules[i].testPattern, rules[i].replacement);
}
Console::Printf("\n\t],"
"\n\t\"aliases\": [");
for (size_t i = 0; i < aliases.GetCount(); ++i) {
if (i != 0) {
Console::Printf(",");
}
Console::Printf("\n\t\t{"
"\n\t\t\t\"suffix\": \"%J\","
"\n\t\t\t\"alias\": \"%J\""
"\n\t\t}",
aliases[i].text, aliases[i].alias);
}
Console::Printf("\n\t],"
"\n\t\"auto-suffix\": [");
for (size_t i = 0; i < autoSuffixes.GetCount(); ++i) {
if (i != 0) {
Console::Printf(",");
}
Console::Printf("\n\t\t{"
"\n\t\t\t\"key\": \"%t\","
"\n\t\t\t\"suffix\": \"%J\""
"\n\t\t}",
&autoSuffixes[i].stroke, autoSuffixes[i].text + 1);
}
Console::Printf("\n\t],"
"\n\t\"reverse-auto-suffix\": [");
for (size_t i = 0; i < reverseAutoSuffixes.GetCount(); ++i) {
if (i != 0) {
Console::Printf(",");
}
Console::Printf("\n\t\t{"
"\n\t\t\t\"key\": \"%t\","
"\n\t\t\t\"suppressMask\": \"%t\","
"\n\t\t\t\"pattern\": \"%J\","
"\n\t\t\t\"replacement\": \"%J\""
"\n\t\t}",
&reverseAutoSuffixes[i].autoSuffix->stroke,
&reverseAutoSuffixes[i].suppressMask,
reverseAutoSuffixes[i].testPattern,
reverseAutoSuffixes[i].replacement);
}
Console::Printf("\n\t]\n}\n\n");
}
//---------------------------------------------------------------------------
StenoCompiledOrthography::StenoCompiledOrthography(
const StenoOrthography &orthography)
: data(orthography), patterns(CreatePatterns(orthography)) {
#if USE_ORTHOGRAPHY_CACHE
Mem::Clear(cache);
#endif
}
const Pattern *
StenoCompiledOrthography::CreatePatterns(const StenoOrthography &orthography) {
Pattern *patterns =
(Pattern *)malloc(sizeof(Pattern) * orthography.rules.GetCount());
for (size_t i = 0; i < orthography.rules.GetCount(); ++i) {
patterns[i] = Pattern::Compile(orthography.rules[i].testPattern);
}
return patterns;
}
#if USE_ORTHOGRAPHY_CACHE
#if RECORD_ORTHOGRAPHY_CACHE_STATS
static size_t cacheHits;
static size_t cacheMisses;
#endif
char *StenoCompiledOrthography::AddSuffix(const char *word,
const char *suffix) const {
const size_t wordLength = Str::Length(word);
if (wordLength >= MAXIMUM_CACHEABLE_WORD_LENGTH) {
return AddSuffixInternal(word, suffix);
}
const uint32_t crc =
Crc32(word, wordLength) ^ Crc32(suffix, Str::Length(suffix));
const size_t blockIndex = crc & (CACHE_BLOCK_COUNT - 1);
char *cachedResult = cache[blockIndex].Lookup(word, suffix);
if (cachedResult) {
#if RECORD_ORTHOGRAPHY_CACHE_STATS
cacheHits++;
#endif
return cachedResult;
}
#if RECORD_ORTHOGRAPHY_CACHE_STATS
cacheMisses++;
#endif
char *result = AddSuffixInternal(word, suffix);
cache[blockIndex].AddEntry(word, suffix, result);
return result;
}
char *StenoCompiledOrthography::AddSuffixInternal(const char *word,
const char *suffix) const {
#else
char *StenoCompiledOrthography::AddSuffix(const char *word,
const char *suffix) const {
#endif
BestCandidate bestCandidate;
for (const StenoOrthographyAlias &alias : data.aliases) {
if (Str::Eq(suffix, alias.text)) {
AddCandidates(bestCandidate, word, alias.alias,
BestCandidate::EXCLUDE_WORD_SCORE);
}
}
char *simple = Str::Join(word, suffix);
const int score =
WordList::GetWordRank(simple, BestCandidate::FALLBACK_SCORE);
bestCandidate.Add(simple, score);
AddCandidates(bestCandidate, word, suffix,
BestCandidate::NOT_IN_WORD_LIST_SCORE);
return bestCandidate.GetResult();
}
char *StenoCompiledOrthography::AddSuffixToPhrase(const char *phrase,
const char *suffix) const {
const char *lastWord = phrase;
Utf8Pointer p = phrase;
for (;;) {
const uint32_t c = *p++;
if (c == '\0') {
break;
}
if (Unicode::IsWhitespace(c)) {
lastWord = p.GetRawPointer();
}
}
if (lastWord == phrase) {
return AddSuffix(phrase, suffix);
}
char *suffixedLastWord = AddSuffix(lastWord, suffix);
const size_t suffixedLastWordLength = Str::Length(suffixedLastWord);
const size_t prefixLength = lastWord - phrase;
char *result = (char *)malloc(prefixLength + suffixedLastWordLength + 1);
memcpy(result, phrase, prefixLength);
memcpy(result + prefixLength, suffixedLastWord, suffixedLastWordLength + 1);
free(suffixedLastWord);
return result;
}
void StenoCompiledOrthography::AddCandidates(BestCandidate &bestCandidate,
const char *word,
const char *suffix,
int defaultScore) const {
const size_t MAXIMUM_PREFIX_LENGTH = 8;
const size_t wordLength = strlen(word);
const size_t offset = wordLength > MAXIMUM_PREFIX_LENGTH
? wordLength - MAXIMUM_PREFIX_LENGTH
: 0;
char *text = Str::Join(word + offset, " ^", suffix);
const PatternQuickReject inputQuickReject(text);
for (size_t i = 0; i < data.rules.GetCount(); ++i) {
const Pattern &pattern = patterns[i];
if (!pattern.IsPossibleMatch(inputQuickReject)) {
continue;
}
const PatternMatch match = pattern.MatchBypassingQuickReject(text);
if (!match.match) {
continue;
}
char *candidate = match.Replace(data.rules[i].replacement);
if (offset != 0) {
const size_t candidateWithNulLength = strlen(candidate) + 1;
char *fullCandidate = (char *)malloc(offset + candidateWithNulLength);
memcpy(fullCandidate, word, offset);
memcpy(fullCandidate + offset, candidate, candidateWithNulLength);
free(candidate);
candidate = fullCandidate;
}
const int score = WordList::GetWordRank(candidate, defaultScore);
bestCandidate.Add(candidate, score);
}
free(text);
}
//---------------------------------------------------------------------------
void StenoCompiledOrthography::PrintInfo() const {
Console::Printf(" Orthography\n");
Console::Printf(" Rules: %zu\n", data.rules.GetCount());
Console::Printf(" Aliases: %zu\n", data.aliases.GetCount());
Console::Printf(" Auto-suffixes: %zu\n", data.autoSuffixes.GetCount());
Console::Printf(" Reverse auto-suffixes: %zu\n",
data.reverseAutoSuffixes.GetCount());
#if RECORD_ORTHOGRAPHY_CACHE_STATS
Console::Printf(" Cache hits: %zu/%zu\n", cacheHits,
cacheHits + cacheMisses);
#endif
}
//---------------------------------------------------------------------------