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/* NOLINT(build/header_guard) */
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: Histogram, DATA_SIZE, DataType */
/* A simple container for histograms of data in blocks. */
typedef struct FN(Histogram) {
uint32_t data_[DATA_SIZE];
size_t total_count_;
double bit_cost_;
} FN(Histogram);
static BROTLI_INLINE void FN(HistogramClear)(FN(Histogram)* self) {
memset(self->data_, 0, sizeof(self->data_));
self->total_count_ = 0;
self->bit_cost_ = HUGE_VAL;
}
static BROTLI_INLINE void FN(ClearHistograms)(
FN(Histogram)* array, size_t length) {
size_t i;
for (i = 0; i < length; ++i) FN(HistogramClear)(array + i);
}
static BROTLI_INLINE void FN(HistogramAdd)(FN(Histogram)* self, size_t val) {
++self->data_[val];
++self->total_count_;
}
static BROTLI_INLINE void FN(HistogramAddVector)(FN(Histogram)* self,
const DataType* p, size_t n) {
self->total_count_ += n;
n += 1;
while (--n) ++self->data_[*p++];
}
static BROTLI_INLINE void FN(HistogramAddHistogram)(FN(Histogram)* self,
const FN(Histogram)* v) {
size_t i;
self->total_count_ += v->total_count_;
for (i = 0; i < DATA_SIZE; ++i) {
self->data_[i] += v->data_[i];
}
}
static BROTLI_INLINE size_t FN(HistogramDataSize)(void) { return DATA_SIZE; }