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# File 'ext/extzstd_stream.c', line 95
static VALUE
enc_init(int argc, VALUE argv[], VALUE self)
{
/*
* ZSTDLIB_API size_t ZSTD_initCStream(ZSTD_CStream* zcs, int compressionLevel);
* ZSTDLIB_API size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel);
* ZSTDLIB_API size_t ZSTD_initCStream_advanced(ZSTD_CStream* zcs, const void* dict, size_t dictSize,
* ZSTD_parameters params, unsigned long long pledgedSrcSize);
*/
VALUE outport, params, predict;
switch (argc) {
case 1:
outport = argv[0];
params = predict = Qnil;
break;
case 2:
outport = argv[0];
params = argv[1];
predict = Qnil;
break;
case 3:
outport = argv[0];
params = argv[1];
predict = argv[2];
break;
default:
rb_error_arity(argc, 1, 3);
}
struct encoder *p = getencoder(self);
if (p->context) {
rb_raise(rb_eTypeError,
"initialized already - #<%s:%p>",
rb_obj_classname(self), (void *)self);
}
const void *predictp;
size_t predictsize;
if (NIL_P(predict)) {
predictp = NULL;
predictsize = 0;
} else {
rb_check_type(predict, RUBY_T_STRING);
predict = rb_str_new_frozen(predict);
RSTRING_GETMEM(predict, predictp, predictsize);
}
AUX_TRY_WITH_GC(
p->context = ZSTD_createCStream(),
"failed ZSTD_createCStream()");
if (extzstd_params_p(params)) {
ZSTD_parameters *paramsp = extzstd_getparams(params);
ZSTD_CCtx *zstd = p->context;
p->context = NULL; // 一時的に無効化する
aux_ZSTD_CCtx_reset(zstd, ZSTD_reset_session_and_parameters);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_windowLog, paramsp->cParams.windowLog);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_chainLog, paramsp->cParams.chainLog);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_hashLog, paramsp->cParams.hashLog);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_searchLog, paramsp->cParams.searchLog);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_minMatch, paramsp->cParams.minMatch);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_targetLength, paramsp->cParams.targetLength);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_strategy, paramsp->cParams.strategy);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_contentSizeFlag, paramsp->fParams.contentSizeFlag);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_checksumFlag, paramsp->fParams.checksumFlag);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_dictIDFlag, !paramsp->fParams.noDictIDFlag);
aux_ZSTD_CCtx_loadDictionary(zstd, predictp, predictsize);
p->context = zstd;
} else {
int clevel = aux_num2int(params, ZSTD_CLEVEL_DEFAULT);
ZSTD_CCtx *zstd = p->context;
p->context = NULL; // 一時的に無効化する
aux_ZSTD_CCtx_reset(zstd, ZSTD_reset_session_and_parameters);
aux_ZSTD_CCtx_setParameter(zstd, ZSTD_c_compressionLevel, clevel);
aux_ZSTD_CCtx_loadDictionary(zstd, predictp, predictsize);
p->context = zstd;
}
p->predict = predict;
p->outport = outport;
return self;
}
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