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Add more default hashing procs, name changes, Dqn_EatLine

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This commit is contained in:
Doyle 2018-08-28 00:25:08 +10:00
parent e0fc9f7b44
commit 3501dd41c1
2 changed files with 130 additions and 124 deletions
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11
DqnUnitTest.cpp
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@ -1778,17 +1778,6 @@ void DqnFile_Test()
file.Close();
DQN_ASSERT(!file.handle && file.size == 0 && file.flags == 0);
if (1)
{
DqnSmartFile raiiFile = {};
if (raiiFile.Open(
FILE_TO_OPEN, DqnFile::Flag::FileReadWrite, DqnFile::Action::OpenOnly))
{
i32 breakHereToTestRaii = 0;
(void)breakHereToTestRaii;
}
}
Log(Status::Ok, "General test");
}

243
dqn.h
View File

@ -803,12 +803,6 @@ DQN_FILE_SCOPE char *DqnChar_SkipWhitespace (char const *ptr);
// return: The ptr to the last char, null if it could not find.
DQN_FILE_SCOPE char *DqnChar_FindLastChar (char *ptr, char ch, i32 len, u32 *len_to_char);
// Finds up to the first [\r]\n and destroy the line, giving you a null terminated line at the newline.
// returns: The value to advance the ptr by, this can be different from the line
// length if there are new lines or leading whitespaces in the next line
DQN_FILE_SCOPE i32 DqnChar_FindNextLine(char *ptr, i32 *line_len);
DQN_FILE_SCOPE char *DqnChar_GetNextLine (char *ptr, i32 *line_len);
// #DqnStr API
// =================================================================================================
// num_bytes_to_cmp: If -1, cmp runs until \0 is encountered.
@ -907,6 +901,11 @@ i32 Dqn_SplitString(char const *src, i32 src_len, char split_char, DqnSlice<char
// return: The number of splits, splitting by "split_char" would generate.
i32 Dqn_GetNumSplits(char const *src, i32 src_len, char split_char);
// Skips whitespace then reads UTF8 rune upto first \r or \n and null terminates at that point. Advances input to the start of the next line.
// return: The immediate null terminated line
DQN_FILE_SCOPE char *Dqn_EatLine(char **input, int *line_len);
DQN_FILE_SCOPE wchar_t *Dqn_EatLine(wchar_t **input, int *line_len);
DQN_FILE_SCOPE inline bool Dqn_BitIsSet (u32 bits, u32 flag);
DQN_FILE_SCOPE inline u32 Dqn_BitSet (u32 bits, u32 flag);
DQN_FILE_SCOPE inline u32 Dqn_BitUnset (u32 bits, u32 flag);
@ -1514,7 +1513,8 @@ struct DqnMemStack
char *head; // Read
char *tail; // Read
Block(void *memory_, isize size_) : memory((char *)memory_), size(size_), prev_block(nullptr), head((char *)memory_), tail((char *)memory_ + size_) {}
Block() = default;
Block(void *memory_, isize size_) { *this = {}; memory = (char *)memory_; size = size_; head = memory; tail = memory + size; }
};
DqnMemTracker tracker; // Read: Metadata for managing ptr allocation
@ -2142,6 +2142,11 @@ const u64 DQN_VHASH_TABLE_DEFAULT_SEED = 0x9747B28CAB3F8A7B;
template <typename T> DQN_VHASH_TABLE_HASHING_PROC(DqnVHashTableDefaultHash, T) { return DqnHash_Murmur64Seed(&key, sizeof(key), DQN_VHASH_TABLE_DEFAULT_SEED) % count; }
template <typename T> DQN_VHASH_TABLE_EQUALS_PROC (DqnVHashTableDefaultEquals, T) { return (DqnMem_Cmp(&a, &b, sizeof(a)) == 0); }
template <> DQN_VHASH_TABLE_HASHING_PROC(DqnVHashTableDefaultHash<DqnString>, DqnString) { return DqnHash_Murmur64Seed(&key.str, key.len, DQN_VHASH_TABLE_DEFAULT_SEED) % count; }
template <> DQN_VHASH_TABLE_EQUALS_PROC (DqnVHashTableDefaultEquals<DqnString>, DqnString) { return (a.len == b.len) && (DqnStr_Cmp(a.str, b.str, a.len) == 0); }
template <> DQN_VHASH_TABLE_HASHING_PROC(DqnVHashTableDefaultHash<DqnBuffer<char>>, DqnBuffer<char>) { return DqnHash_Murmur64Seed(&key.str, key.len, DQN_VHASH_TABLE_DEFAULT_SEED) % count; }
template <> DQN_VHASH_TABLE_EQUALS_PROC (DqnVHashTableDefaultEquals<DqnBuffer<char>>, DqnBuffer<char>) { return DQN_BUFFER_STRCMP(a, b, Dqn::IgnoreCase::No); }
// TODO(doyle): Fix this so we don't have to manually declare the fixed string sizes for hashing and equals
#define DQN_VHASH_TABLE_DEFAULT_FIXED_STRING_PROCS(StringCapacity) \
template <> \
@ -2190,19 +2195,19 @@ struct DqnVHashTable
struct Bucket
{
Entry entries[4];
isize entryIndex;
isize entry_index;
};
Bucket *buckets;
isize numBuckets;
isize *indexesOfUsedBuckets;
isize indexInUsedBuckets;
isize num_buckets;
isize *indexes_of_used_buckets;
isize num_used_buckets;
DqnVHashTable () = default;
DqnVHashTable (isize size) { LazyInit(size); }
DqnVHashTable (isize size) { LazyInit(size); }
void LazyInit (isize size = DQN_MAX(DQN_MEGABYTE(1)/sizeof(Bucket), 1024) );
void Free () { if (buckets) DqnOS_VFree(buckets, sizeof(buckets) * numBuckets); *this = {}; }
void Free () { if (buckets) DqnOS_VFree(buckets, sizeof(buckets) * num_buckets); *this = {}; }
void Erase (Key const &key); // Delete the element matching key, does nothing if key not found.
Entry *GetEntry (Key const &key); // return: The (key, item) entry associated with the key, nullptr if key not in table yet.
@ -2215,15 +2220,15 @@ struct DqnVHashTable
struct Iterator
{
Entry *entry;
Iterator(DqnVHashTable *table_, isize indexInUsedBuckets_ = 0, isize indexInBucket_ = 0);
Bucket *GetCurrBucket() const { return (table->buckets + table->indexesOfUsedBuckets[indexInUsedBuckets]); }
Entry *GetCurrEntry() const { return GetCurrBucket()->entries + indexInBucket; }
Iterator(DqnVHashTable *table_, isize num_used_buckets_ = 0, isize index_in_bucket_ = 0);
Bucket *GetCurrBucket() const { return (table->buckets + table->indexes_of_used_buckets[num_used_buckets]); }
Entry *GetCurrEntry() const { return GetCurrBucket()->entries + index_in_bucket; }
Item *GetCurrItem () const { return &(GetCurrEntry()->item); }
bool operator!=(Iterator const &other) const { return !(indexInUsedBuckets == other.indexInUsedBuckets && indexInBucket == other.indexInBucket); }
bool operator!=(Iterator const &other) const { return !(num_used_buckets == other.num_used_buckets && index_in_bucket == other.index_in_bucket); }
Entry &operator* () const { return *GetCurrEntry(); }
Iterator &operator++();
Iterator &operator--() { if (--indexInBucket < 0) { indexInBucket = 0; indexInUsedBuckets = DQN_MAX(--indexInUsedBuckets, 0); } entry = GetCurrEntry(); return *this; }
Iterator &operator--() { if (--index_in_bucket < 0) { index_in_bucket = 0; num_used_buckets = DQN_MAX(--num_used_buckets, 0); } entry = GetCurrEntry(); return *this; }
Iterator operator++(int) { Iterator result = *this; ++(*this); return result; }
Iterator operator--(int) { Iterator result = *this; --(*this); return result; }
Iterator operator+ (int offset) const { Iterator result = *this; DQN_FOR_EACH(i, DQN_ABS(offset)) { (offset > 0) ? ++result : --result; } return result; } // TODO(doyle): Improve
@ -2231,33 +2236,33 @@ struct DqnVHashTable
private:
DqnVHashTable *table;
isize indexInUsedBuckets;
isize indexInBucket;
isize num_used_buckets;
isize index_in_bucket;
};
Iterator Begin() { return begin(); }
Iterator End() { return end(); }
Iterator begin() { return Iterator(this); }
Iterator end() { return Iterator(this, numBuckets, DQN_ARRAY_COUNT(this->buckets[0].entries)); }
Iterator end() { return Iterator(this, num_buckets, DQN_ARRAY_COUNT(this->buckets[0].entries)); }
};
DQN_VHASH_TABLE_TEMPLATE DQN_VHASH_TABLE_DECL::Iterator::Iterator(DqnVHashTable *table_,
isize indexInUsedBuckets_,
isize indexInBucket_)
isize num_used_buckets_,
isize index_in_bucket_)
: table(table_)
, indexInUsedBuckets(indexInUsedBuckets_)
, indexInBucket(indexInBucket_)
, num_used_buckets(num_used_buckets_)
, index_in_bucket(index_in_bucket_)
, entry(nullptr)
{
bool sentinelIndex = (indexInUsedBuckets == table->numBuckets &&
indexInBucket == DQN_ARRAY_COUNT(table->buckets[0].entries));
bool emptyTable = (table->indexInUsedBuckets == 0);
if (emptyTable || sentinelIndex)
bool sentinel_index = (num_used_buckets == table->num_buckets &&
index_in_bucket == DQN_ARRAY_COUNT(table->buckets[0].entries));
bool empty_table = (table->num_used_buckets == 0);
if (empty_table || sentinel_index)
{
if (emptyTable)
if (empty_table)
{
this->indexInUsedBuckets = table->numBuckets;
this->indexInBucket = DQN_ARRAY_COUNT(table->buckets[0].entries);
this->num_used_buckets = table->num_buckets;
this->index_in_bucket = DQN_ARRAY_COUNT(table->buckets[0].entries);
}
}
else
@ -2268,13 +2273,13 @@ DQN_VHASH_TABLE_TEMPLATE DQN_VHASH_TABLE_DECL::Iterator::Iterator(DqnVHashTable
DQN_VHASH_TABLE_TEMPLATE typename DQN_VHASH_TABLE_DECL::Iterator &DQN_VHASH_TABLE_DECL::Iterator::operator++()
{
if (++indexInBucket >= GetCurrBucket()->entryIndex)
if (++index_in_bucket >= GetCurrBucket()->entry_index)
{
indexInBucket = 0;
indexInUsedBuckets++;
index_in_bucket = 0;
num_used_buckets++;
}
if (indexInUsedBuckets < table->indexInUsedBuckets)
if (num_used_buckets < table->num_used_buckets)
entry = GetCurrEntry();
else
*this = table->end();
@ -2285,10 +2290,10 @@ DQN_VHASH_TABLE_TEMPLATE typename DQN_VHASH_TABLE_DECL::Iterator &DQN_VHASH_TABL
DQN_VHASH_TABLE_TEMPLATE void DQN_VHASH_TABLE_DECL::LazyInit(isize size)
{
*this = {};
this->numBuckets = size;
this->num_buckets = size;
this->buckets = static_cast<Bucket *>(DqnOS_VAlloc(size * sizeof(*this->buckets)));
this->indexesOfUsedBuckets = static_cast<isize *> (DqnOS_VAlloc(size * sizeof(*this->indexesOfUsedBuckets)));
DQN_ASSERT(this->buckets && this->indexesOfUsedBuckets);
this->indexes_of_used_buckets = static_cast<isize *> (DqnOS_VAlloc(size * sizeof(*this->indexes_of_used_buckets)));
DQN_ASSERT(this->buckets && this->indexes_of_used_buckets);
}
DQN_VHASH_TABLE_TEMPLATE typename DQN_VHASH_TABLE_DECL::Entry *
@ -2296,11 +2301,11 @@ DQN_VHASH_TABLE_DECL::GetEntry(Key const &key)
{
if (!buckets) return nullptr;
isize index = Hash(this->numBuckets, key);
isize index = Hash(this->num_buckets, key);
Bucket *bucket = this->buckets + index;
Entry *result = nullptr;
for (isize i = 0; i < bucket->entryIndex && !result; i++)
for (isize i = 0; i < bucket->entry_index && !result; i++)
{
Entry *entry = bucket->entries + i;
result = Equals(entry->key, key) ? entry : nullptr;
@ -2313,11 +2318,11 @@ DQN_VHASH_TABLE_TEMPLATE Item *DQN_VHASH_TABLE_DECL::GetOrMake(Key const &key, b
{
if (!this->buckets) LazyInit();
isize index = Hash(this->numBuckets, key);
isize index = Hash(this->num_buckets, key);
Bucket *bucket = this->buckets + index;
Entry *entry = nullptr;
for (isize i = 0; i < bucket->entryIndex && !entry; i++)
for (isize i = 0; i < bucket->entry_index && !entry; i++)
{
Entry *check = bucket->entries + i;
entry = Equals(check->key, key) ? check : nullptr;
@ -2328,22 +2333,22 @@ DQN_VHASH_TABLE_TEMPLATE Item *DQN_VHASH_TABLE_DECL::GetOrMake(Key const &key, b
if (!entry)
{
DQN_ALWAYS_ASSERTM(bucket->entryIndex < DQN_ARRAY_COUNT(bucket->entries),
DQN_ALWAYS_ASSERTM(bucket->entry_index < DQN_ARRAY_COUNT(bucket->entries),
"More than %zu collisions in hash table, increase the size of the table or buckets",
DQN_ARRAY_COUNT(bucket->entries));
if (bucket->entryIndex == 0)
this->indexesOfUsedBuckets[this->indexInUsedBuckets++] = index;
if (bucket->entry_index == 0)
this->indexes_of_used_buckets[this->num_used_buckets++] = index;
entry = bucket->entries + bucket->entryIndex++;
entry = bucket->entries + bucket->entry_index++;
entry->key = key;
// TODO(doyle): A maybe case. We're using virtual memory, so you should
// just initialise a larger size. It's essentially free ... maybe one
// day we care about resizing the table but at the cost of a lot more code
// complexity.
isize const threshold = static_cast<isize>(0.75f * this->numBuckets);
DQN_ALWAYS_ASSERTM(this->indexInUsedBuckets < threshold, "%zu >= %zu", this->indexInUsedBuckets, threshold);
isize const threshold = static_cast<isize>(0.75f * this->num_buckets);
DQN_ALWAYS_ASSERTM(this->num_used_buckets < threshold, "%zu >= %zu", this->num_used_buckets, threshold);
}
Item *result = &entry->item;
@ -2355,31 +2360,31 @@ DQN_VHASH_TABLE_TEMPLATE void DQN_VHASH_TABLE_DECL::Erase(Key const &key)
if (!buckets)
return;
isize index = Hash(this->numBuckets, key);
isize index = Hash(this->num_buckets, key);
Bucket *bucket = this->buckets + index;
DQN_FOR_EACH(i, bucket->entryIndex)
DQN_FOR_EACH(i, bucket->entry_index)
{
Entry *check = bucket->entries + i;
if (Equals(check->key, key))
{
for (isize j = i; j < (bucket->entryIndex - 1); ++j)
for (isize j = i; j < (bucket->entry_index - 1); ++j)
bucket->entries[j] = bucket->entries[j + 1];
if (--bucket->entryIndex == 0)
if (--bucket->entry_index == 0)
{
DQN_FOR_EACH(bucketIndex, this->indexInUsedBuckets)
DQN_FOR_EACH(bucketIndex, this->num_used_buckets)
{
if (this->indexesOfUsedBuckets[bucketIndex] == index)
if (this->indexes_of_used_buckets[bucketIndex] == index)
{
indexesOfUsedBuckets[bucketIndex] =
indexesOfUsedBuckets[--this->indexInUsedBuckets];
indexes_of_used_buckets[bucketIndex] =
indexes_of_used_buckets[--this->num_used_buckets];
}
}
}
DQN_ASSERT(this->indexInUsedBuckets >= 0);
DQN_ASSERT(bucket->entryIndex >= 0);
DQN_ASSERT(this->num_used_buckets >= 0);
DQN_ASSERT(bucket->entry_index >= 0);
return;
}
}
@ -2463,7 +2468,7 @@ DQN_FILE_SCOPE bool DqnFile_Size(wchar_t const *path, usize *size);
DQN_FILE_SCOPE bool DqnFile_MakeDir(char const *path);
// info: Pass in to fill with file attributes.
// info: (Optional) Pass in to fill with file attributes
// return: False if file access failure
DQN_FILE_SCOPE bool DqnFile_GetInfo(char const *path, DqnFileInfo *info);
DQN_FILE_SCOPE bool DqnFile_GetInfo(wchar_t const *path, DqnFileInfo *info);
@ -2482,11 +2487,6 @@ DQN_FILE_SCOPE bool DqnFile_Copy (wchar_t const *src, wchar_t const *dest);
DQN_FILE_SCOPE char **DqnFile_ListDir (char const *dir, i32 *num_files, DqnMemAPI *api = DQN_DEFAULT_HEAP_ALLOCATOR);
DQN_FILE_SCOPE void DqnFile_ListDirFree (char **file_list, i32 num_files, DqnMemAPI *api = DQN_DEFAULT_HEAP_ALLOCATOR);
struct DqnSmartFile : public DqnFile
{
~DqnSmartFile() { this->Close(); }
};
// XPlatform > #DqnCatalog API
// =================================================================================================
using DqnCatalogPath = DqnFixedString1024;
@ -3365,7 +3365,7 @@ DqnMemStack__AllocateBlock(isize size, Dqn::ZeroClear clear, DqnMemAPI *api)
DQN_ALWAYS_ASSERTM(result, "Allocated memory block was null");
char *block_offset = reinterpret_cast<char *>(result) + sizeof(*result);
*result = DqnMemStack::Block(block_offset, size);
*result = DqnMemStack::Block(block_offset, size);
return result;
}
@ -3463,6 +3463,7 @@ void *DqnMemStack::Push(isize size, AllocTo allocTo, u8 alignment)
DQN_ASSERT(this->block->tail >= this->block->head);
}
this->block->used_ = this->block->size - (this->block->tail - this->block->head);
// Instrument allocation with guards and tracker
// =============================================================================================
{
@ -4645,48 +4646,58 @@ DQN_FILE_SCOPE char *DqnChar_FindLastChar(char *ptr, char ch, i32 len, u32 *len_
return nullptr;
}
DQN_FILE_SCOPE i32 DqnChar_FindNextLine(char *ptr, i32 *line_len)
DQN_FILE_SCOPE char *Dqn_EatLine(char **input, int *line_len)
{
i32 len = 0;
ptr = DqnChar_SkipWhitespace(ptr);
*input = DqnChar_SkipWhitespace(*input);
char *result = *input;
// Advance pointer to first new line
while (ptr && *ptr != 0 && *ptr != '\r' && *ptr != '\n')
for (int rune_len = -1;; rune_len = -1)
{
ptr++;
len++;
}
u32 rune = 0;
for (; rune_len != 0 && rune_len != 1; *input += rune_len)
rune_len = DqnStr_ReadUTF8Codepoint(reinterpret_cast<u32 *>(*input), &rune);
if (!ptr || *ptr == 0)
{
if (line_len) *line_len = len;
return -1;
if (rune_len == 1)
{
if (rune == '\r' || rune == '\n')
{
char *ptr_to_rune = (*input - rune_len);
*ptr_to_rune = 0;
*line_len = static_cast<int>(ptr_to_rune - result);
return result;
}
}
else if (rune_len == 0)
{
*line_len = static_cast<int>(*input - result);
*input = nullptr;
return result;
}
}
// Destroy all new lines
i32 extra_chars = 0;
while (ptr && (*ptr == '\r' || *ptr == '\n' || *ptr == ' '))
{
*ptr = 0;
ptr++;
extra_chars++;
}
if (line_len) *line_len = len;
return len + extra_chars;
}
DQN_FILE_SCOPE char *DqnChar_GetNextLine (char *ptr, i32 *line_len)
DQN_FILE_SCOPE wchar_t *Dqn_EatLine(wchar_t **input, int *line_len)
{
i32 offset_to_next_line = DqnChar_FindNextLine(ptr, line_len);
*input = DqnWChar_SkipWhitespace(*input);
wchar_t *result = *input;
char *result = nullptr;
if (offset_to_next_line != -1)
for (;; (*input)++)
{
result = ptr + offset_to_next_line;
}
if (!(*input))
{
*line_len = static_cast<int>(*input - result);
return result;
}
return result;
wchar_t ch = (*input)[0];
if (ch == '\r' || ch == '\n')
{
(*input)[0] = 0;
*line_len = static_cast<int>(*input - result);
(*input)++;
return result;
}
}
}
// #DqnStr Implementation
@ -7908,14 +7919,14 @@ FILE_SCOPE bool DqnFile__UnixGetFileSize(char const *path, usize *size)
{
struct stat file_stat = {};
stat(path, &file_stat);
*size = file_stat.st_size;
if (size) *size = file_stat.st_size;
if (*size != 0)
if (file_stat.st_size != 0)
return true;
// NOTE: Can occur in some instances where files are generated on demand, i.e. /proc/cpuinfo.
// But there can also be zero-byte files, we can't be sure. So manual check by counting bytes
if (FILE *file = fopen(path, "rb"))
if (size && FILE *file = fopen(path, "rb"))
{
DQN_DEFER(fclose(file));
while (fgetc(file) != EOF)
@ -8332,7 +8343,7 @@ bool DqnFile_Size(wchar_t const *path, usize *size)
DqnFileInfo info = {};
if (DqnFile_GetInfo(path, &info))
{
*size = info.size;
if (size) *size = info.size;
return true;
}
@ -8382,15 +8393,18 @@ bool DqnFile_GetInfo(wchar_t const *path, DqnFileInfo *info)
WIN32_FILE_ATTRIBUTE_DATA attrib_data = {};
if (GetFileAttributesExW(path, GetFileExInfoStandard, &attrib_data))
{
info->create_time_in_s = FileTimeToSeconds(&attrib_data.ftCreationTime);
info->last_access_time_in_s = FileTimeToSeconds(&attrib_data.ftLastAccessTime);
info->last_write_time_in_s = FileTimeToSeconds(&attrib_data.ftLastWriteTime);
if (info)
{
info->create_time_in_s = FileTimeToSeconds(&attrib_data.ftCreationTime);
info->last_access_time_in_s = FileTimeToSeconds(&attrib_data.ftLastAccessTime);
info->last_write_time_in_s = FileTimeToSeconds(&attrib_data.ftLastWriteTime);
// TODO(doyle): What if usize is < Quad.part?
LARGE_INTEGER large_int = {};
large_int.HighPart = attrib_data.nFileSizeHigh;
large_int.LowPart = attrib_data.nFileSizeLow;
info->size = (usize)large_int.QuadPart;
// TODO(doyle): What if usize is < Quad.part?
LARGE_INTEGER large_int = {};
large_int.HighPart = attrib_data.nFileSizeHigh;
large_int.LowPart = attrib_data.nFileSizeLow;
info->size = (usize)large_int.QuadPart;
}
return true;
}
@ -8419,10 +8433,13 @@ bool DqnFile_GetInfo(char const *path, DqnFileInfo *info)
return false;
}
info->size = file_stat.st_size;
info->create_time_in_s = 0;
info->last_write_time_in_s = file_stat.st_mtime;
info->last_access_time_in_s = file_stat.st_atime;
if (info)
{
info->size = file_stat.st_size;
info->create_time_in_s = 0;
info->last_write_time_in_s = file_stat.st_mtime;
info->last_access_time_in_s = file_stat.st_atime;
}
return true;
#endif