Class: MultiCompress::Deflater
- Inherits:
-
Object
- Object
- MultiCompress::Deflater
- Defined in:
- ext/multi_compress/multi_compress.c
Instance Method Summary collapse
- #close ⇒ Object
- #closed? ⇒ Boolean
- #finish ⇒ Object
- #flush ⇒ Object
- #initialize(*args) ⇒ Object constructor
- #reset ⇒ Object
- #write(chunk) ⇒ Object
Constructor Details
#initialize(*args) ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1066
static VALUE deflater_initialize(int argc, VALUE *argv, VALUE self) {
VALUE opts;
rb_scan_args(argc, argv, "0:", &opts);
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
VALUE algo_sym = Qnil, level_val = Qnil, dict_val = Qnil;
if (!NIL_P(opts)) {
algo_sym = rb_hash_aref(opts, ID2SYM(rb_intern("algo")));
level_val = rb_hash_aref(opts, ID2SYM(rb_intern("level")));
dict_val = rb_hash_aref(opts, ID2SYM(rb_intern("dictionary")));
}
d->algo = NIL_P(algo_sym) ? ALGO_ZSTD : sym_to_algo(algo_sym);
d->level = resolve_level(d->algo, level_val);
d->closed = 0;
d->finished = 0;
dictionary_t *dict = NULL;
if (!NIL_P(dict_val)) {
if (d->algo == ALGO_LZ4) {
rb_raise(eUnsupportedError, "LZ4 does not support dictionaries");
}
TypedData_Get_Struct(dict_val, dictionary_t, &dictionary_type, dict);
rb_ivar_set(self, rb_intern("@dictionary"), dict_val);
}
switch (d->algo) {
case ALGO_ZSTD: {
d->ctx.zstd = ZSTD_createCStream();
if (!d->ctx.zstd)
rb_raise(eMemError, "zstd: failed to create stream");
if (dict) {
ZSTD_CCtx_reset(d->ctx.zstd, ZSTD_reset_session_only);
ZSTD_CCtx_setParameter(d->ctx.zstd, ZSTD_c_compressionLevel, d->level);
size_t r = ZSTD_CCtx_loadDictionary(d->ctx.zstd, dict->data, dict->size);
if (ZSTD_isError(r))
rb_raise(eError, "zstd dict load: %s", ZSTD_getErrorName(r));
} else {
size_t r = ZSTD_initCStream(d->ctx.zstd, d->level);
if (ZSTD_isError(r))
rb_raise(eError, "zstd init: %s", ZSTD_getErrorName(r));
}
break;
}
case ALGO_BROTLI: {
d->ctx.brotli = BrotliEncoderCreateInstance(NULL, NULL, NULL);
if (!d->ctx.brotli)
rb_raise(eMemError, "brotli: failed to create encoder");
if (!BrotliEncoderSetParameter(d->ctx.brotli, BROTLI_PARAM_QUALITY, d->level)) {
BrotliEncoderDestroyInstance(d->ctx.brotli);
d->ctx.brotli = NULL;
rb_raise(eError, "brotli: failed to set quality parameter");
}
if (dict) {
BrotliEncoderPreparedDictionary *pd =
BrotliEncoderPrepareDictionary(BROTLI_SHARED_DICTIONARY_RAW, dict->size, dict->data,
BROTLI_MAX_QUALITY, NULL, NULL, NULL);
if (!pd) {
BrotliEncoderDestroyInstance(d->ctx.brotli);
d->ctx.brotli = NULL;
rb_raise(eMemError, "brotli: failed to prepare dictionary");
}
if (!BrotliEncoderAttachPreparedDictionary(d->ctx.brotli, pd)) {
BrotliEncoderDestroyPreparedDictionary(pd);
BrotliEncoderDestroyInstance(d->ctx.brotli);
d->ctx.brotli = NULL;
rb_raise(eError, "brotli: failed to attach dictionary");
}
BrotliEncoderDestroyPreparedDictionary(pd);
}
break;
}
case ALGO_LZ4: {
d->ctx.lz4 = LZ4_createStream();
if (!d->ctx.lz4)
rb_raise(eMemError, "lz4: failed to create stream");
LZ4_resetStream(d->ctx.lz4);
d->lz4_ring.buf = ALLOC_N(char, LZ4_RING_BUFFER_TOTAL);
d->lz4_ring.ring_offset = 0;
d->lz4_ring.pending = 0;
break;
}
}
return self;
}
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Instance Method Details
#close ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1547
static VALUE deflater_close(VALUE self) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
if (d->closed)
return Qnil;
switch (d->algo) {
case ALGO_ZSTD:
if (d->ctx.zstd) {
ZSTD_freeCStream(d->ctx.zstd);
d->ctx.zstd = NULL;
}
break;
case ALGO_BROTLI:
if (d->ctx.brotli) {
BrotliEncoderDestroyInstance(d->ctx.brotli);
d->ctx.brotli = NULL;
}
break;
case ALGO_LZ4:
if (d->ctx.lz4) {
LZ4_freeStream(d->ctx.lz4);
d->ctx.lz4 = NULL;
}
break;
}
d->closed = 1;
return Qnil;
}
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#closed? ⇒ Boolean
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# File 'ext/multi_compress/multi_compress.c', line 1577
static VALUE deflater_closed_p(VALUE self) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
return d->closed ? Qtrue : Qfalse;
}
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#finish ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1390
static VALUE deflater_finish(VALUE self) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
if (d->closed)
rb_raise(eStreamError, "stream is closed");
if (d->finished)
return rb_binary_str_new("", 0);
d->finished = 1;
switch (d->algo) {
case ALGO_ZSTD: {
size_t out_cap = ZSTD_CStreamOutSize();
size_t result_cap = out_cap;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
size_t ret;
do {
if (result_len + out_cap > result_cap) {
result_cap *= 2;
grow_binary_str(result, result_len, result_cap);
}
ZSTD_outBuffer output = {RSTRING_PTR(result) + result_len, out_cap, 0};
ret = ZSTD_endStream(d->ctx.zstd, &output);
if (ZSTD_isError(ret))
rb_raise(eError, "zstd end stream: %s", ZSTD_getErrorName(ret));
result_len += output.pos;
} while (ret > 0);
rb_str_set_len(result, result_len);
return result;
}
case ALGO_BROTLI: {
size_t available_in = 0;
const uint8_t *next_in = NULL;
size_t result_cap = 1024;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
do {
size_t available_out = 0;
uint8_t *next_out = NULL;
BROTLI_BOOL ok =
BrotliEncoderCompressStream(d->ctx.brotli, BROTLI_OPERATION_FINISH, &available_in,
&next_in, &available_out, &next_out, NULL);
if (!ok)
rb_raise(eError, "brotli finish failed");
const uint8_t *out_data;
size_t out_size = 0;
out_data = BrotliEncoderTakeOutput(d->ctx.brotli, &out_size);
if (out_size > 0) {
if (result_len + out_size > result_cap) {
result_cap = (result_len + out_size) * 2;
grow_binary_str(result, result_len, result_cap);
}
memcpy(RSTRING_PTR(result) + result_len, out_data, out_size);
result_len += out_size;
}
} while (BrotliEncoderHasMoreOutput(d->ctx.brotli) ||
!BrotliEncoderIsFinished(d->ctx.brotli));
rb_str_set_len(result, result_len);
return result;
}
case ALGO_LZ4: {
size_t result_cap = 256;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
if (d->lz4_ring.pending > 0) {
VALUE block = lz4_compress_ring_block(d);
size_t blen = RSTRING_LEN(block);
if (blen > 0) {
if (blen + 4 > result_cap) {
result_cap = blen + 4;
grow_binary_str(result, result_len, result_cap);
}
memcpy(RSTRING_PTR(result), RSTRING_PTR(block), blen);
result_len = blen;
}
}
if (result_len + 4 > result_cap) {
result_cap = result_len + 4;
grow_binary_str(result, result_len, result_cap);
}
char *out = RSTRING_PTR(result) + result_len;
out[0] = out[1] = out[2] = out[3] = 0;
result_len += 4;
rb_str_set_len(result, result_len);
return result;
}
}
return rb_binary_str_new("", 0);
}
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#flush ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1320
static VALUE deflater_flush(VALUE self) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
if (d->closed)
rb_raise(eStreamError, "stream is closed");
if (d->finished)
rb_raise(eStreamError, "stream is already finished");
switch (d->algo) {
case ALGO_ZSTD: {
size_t out_cap = ZSTD_CStreamOutSize();
size_t result_cap = out_cap;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
size_t ret;
do {
if (result_len + out_cap > result_cap) {
result_cap *= 2;
grow_binary_str(result, result_len, result_cap);
}
ZSTD_outBuffer output = {RSTRING_PTR(result) + result_len, out_cap, 0};
ret = ZSTD_flushStream(d->ctx.zstd, &output);
if (ZSTD_isError(ret))
rb_raise(eError, "zstd flush: %s", ZSTD_getErrorName(ret));
result_len += output.pos;
} while (ret > 0);
rb_str_set_len(result, result_len);
return result;
}
case ALGO_BROTLI: {
size_t available_in = 0;
const uint8_t *next_in = NULL;
size_t result_cap = 1024;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
do {
size_t available_out = 0;
uint8_t *next_out = NULL;
BROTLI_BOOL ok =
BrotliEncoderCompressStream(d->ctx.brotli, BROTLI_OPERATION_FLUSH, &available_in,
&next_in, &available_out, &next_out, NULL);
if (!ok)
rb_raise(eError, "brotli flush failed");
const uint8_t *out_data;
size_t out_size = 0;
out_data = BrotliEncoderTakeOutput(d->ctx.brotli, &out_size);
if (out_size > 0) {
if (result_len + out_size > result_cap) {
result_cap = (result_len + out_size) * 2;
grow_binary_str(result, result_len, result_cap);
}
memcpy(RSTRING_PTR(result) + result_len, out_data, out_size);
result_len += out_size;
}
} while (BrotliEncoderHasMoreOutput(d->ctx.brotli));
rb_str_set_len(result, result_len);
return result;
}
case ALGO_LZ4:
return lz4_compress_ring_block(d);
}
return rb_binary_str_new("", 0);
}
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#reset ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1491
static VALUE deflater_reset(VALUE self) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
VALUE dict_val = rb_attr_get(self, rb_intern("@dictionary"));
dictionary_t *dict = NULL;
if (!NIL_P(dict_val)) {
TypedData_Get_Struct(dict_val, dictionary_t, &dictionary_type, dict);
}
switch (d->algo) {
case ALGO_ZSTD:
if (d->ctx.zstd) {
ZSTD_CCtx_reset(d->ctx.zstd, ZSTD_reset_session_only);
ZSTD_CCtx_setParameter(d->ctx.zstd, ZSTD_c_compressionLevel, d->level);
if (dict) {
size_t r = ZSTD_CCtx_loadDictionary(d->ctx.zstd, dict->data, dict->size);
if (ZSTD_isError(r))
rb_raise(eError, "zstd dict reload on reset: %s", ZSTD_getErrorName(r));
}
}
break;
case ALGO_BROTLI:
if (d->ctx.brotli) {
BrotliEncoderDestroyInstance(d->ctx.brotli);
d->ctx.brotli = BrotliEncoderCreateInstance(NULL, NULL, NULL);
if (!d->ctx.brotli)
rb_raise(eMemError, "brotli: failed to recreate encoder");
if (!BrotliEncoderSetParameter(d->ctx.brotli, BROTLI_PARAM_QUALITY, d->level))
rb_raise(eError, "brotli: failed to set quality on reset");
if (dict) {
BrotliEncoderPreparedDictionary *pd = BrotliEncoderPrepareDictionary(
BROTLI_SHARED_DICTIONARY_RAW, dict->size, dict->data, BROTLI_MAX_QUALITY, NULL,
NULL, NULL);
if (!pd)
rb_raise(eMemError, "brotli: failed to prepare dictionary on reset");
if (!BrotliEncoderAttachPreparedDictionary(d->ctx.brotli, pd)) {
BrotliEncoderDestroyPreparedDictionary(pd);
rb_raise(eError, "brotli: failed to reattach dictionary on reset");
}
BrotliEncoderDestroyPreparedDictionary(pd);
}
}
break;
case ALGO_LZ4:
if (d->ctx.lz4)
LZ4_resetStream(d->ctx.lz4);
d->lz4_ring.ring_offset = 0;
d->lz4_ring.pending = 0;
break;
}
d->closed = 0;
d->finished = 0;
return self;
}
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#write(chunk) ⇒ Object
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# File 'ext/multi_compress/multi_compress.c', line 1191
static VALUE deflater_write(VALUE self, VALUE chunk) {
deflater_t *d;
TypedData_Get_Struct(self, deflater_t, &deflater_type, d);
if (d->closed)
rb_raise(eStreamError, "stream is closed");
if (d->finished)
rb_raise(eStreamError, "stream is already finished");
StringValue(chunk);
const char *src = RSTRING_PTR(chunk);
size_t slen = RSTRING_LEN(chunk);
if (slen == 0)
return rb_binary_str_new("", 0);
switch (d->algo) {
case ALGO_ZSTD: {
ZSTD_inBuffer input = {src, slen, 0};
size_t out_cap = ZSTD_CStreamOutSize();
size_t result_cap = out_cap > slen ? out_cap : slen;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
int use_fiber = has_fiber_scheduler();
size_t fiber_counter = 0;
while (input.pos < input.size) {
if (result_len + out_cap > result_cap) {
result_cap = result_cap * 2;
grow_binary_str(result, result_len, result_cap);
}
ZSTD_outBuffer output = {RSTRING_PTR(result) + result_len, out_cap, 0};
size_t ret = ZSTD_compressStream(d->ctx.zstd, &output, &input);
if (ZSTD_isError(ret))
rb_raise(eError, "zstd compress stream: %s", ZSTD_getErrorName(ret));
result_len += output.pos;
if (use_fiber) {
int did_yield = 0;
fiber_counter = fiber_maybe_yield(fiber_counter, output.pos, &did_yield);
(void)did_yield;
}
}
rb_str_set_len(result, result_len);
RB_GC_GUARD(chunk);
return result;
}
case ALGO_BROTLI: {
size_t available_in = slen;
const uint8_t *next_in = (const uint8_t *)src;
size_t result_cap = slen;
if (result_cap < 1024)
result_cap = 1024;
VALUE result = rb_binary_str_buf_reserve(result_cap);
size_t result_len = 0;
int use_fiber = has_fiber_scheduler();
size_t fiber_counter = 0;
while (available_in > 0 || BrotliEncoderHasMoreOutput(d->ctx.brotli)) {
size_t available_out = 0;
uint8_t *next_out = NULL;
BROTLI_BOOL ok =
BrotliEncoderCompressStream(d->ctx.brotli, BROTLI_OPERATION_PROCESS, &available_in,
&next_in, &available_out, &next_out, NULL);
if (!ok)
rb_raise(eError, "brotli compress stream failed");
const uint8_t *out_data;
size_t out_size = 0;
out_data = BrotliEncoderTakeOutput(d->ctx.brotli, &out_size);
if (out_size > 0) {
if (result_len + out_size > result_cap) {
result_cap = (result_len + out_size) * 2;
grow_binary_str(result, result_len, result_cap);
}
memcpy(RSTRING_PTR(result) + result_len, out_data, out_size);
result_len += out_size;
if (use_fiber) {
int did_yield = 0;
fiber_counter = fiber_maybe_yield(fiber_counter, out_size, &did_yield);
(void)did_yield;
}
}
}
rb_str_set_len(result, result_len);
RB_GC_GUARD(chunk);
return result;
}
case ALGO_LZ4: {
VALUE result = rb_binary_str_buf_reserve(0);
size_t result_len = 0;
size_t result_cap = 0;
while (slen > 0) {
size_t space = LZ4_RING_BUFFER_SIZE - d->lz4_ring.pending;
size_t copy = slen < space ? slen : space;
if (d->lz4_ring.ring_offset + copy > LZ4_RING_BUFFER_TOTAL) {
rb_raise(eError, "lz4: ring buffer overflow");
}
memcpy(d->lz4_ring.buf + d->lz4_ring.ring_offset, src, copy);
d->lz4_ring.ring_offset += copy;
d->lz4_ring.pending += copy;
src += copy;
slen -= copy;
if (d->lz4_ring.pending >= (size_t)LZ4_RING_BUFFER_SIZE) {
VALUE block = lz4_compress_ring_block(d);
size_t blen = RSTRING_LEN(block);
if (blen > 0) {
if (result_len + blen > result_cap) {
result_cap = (result_len + blen) * 2;
if (result_cap < 256)
result_cap = 256;
grow_binary_str(result, result_len, result_cap);
}
memcpy(RSTRING_PTR(result) + result_len, RSTRING_PTR(block), blen);
result_len += blen;
}
}
}
rb_str_set_len(result, result_len);
RB_GC_GUARD(chunk);
return result;
}
}
return rb_binary_str_new("", 0);
}
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