// file    : core/compress.c
// project : Salis-VM
// author  : Paul Oliver <contact@pauloliver.dev>

// index:
// [section] includes
// [section] definitions

// ----------------------------------------------------------------------------
// [section] includes
// ----------------------------------------------------------------------------
#include <assert.h>
#include <zlib.h>

#include "compress.h"

// ----------------------------------------------------------------------------
// [section] definitions
// ----------------------------------------------------------------------------
int comp_deflate(struct DeflateParams *params) {
    assert(params);
    assert(params->size);
    assert(params->in);
    assert(params->out);

    params->strm.zalloc = NULL;
    params->strm.zfree = NULL;
    params->strm.opaque = NULL;

    deflateInit(&params->strm, Z_DEFAULT_COMPRESSION);

    params->strm.avail_in = params->size;
    params->strm.avail_out = params->size;
    params->strm.next_in = params->in;
    params->strm.next_out = params->out;

    deflate(&params->strm, Z_FINISH);

    return 0;
}

int comp_inflate(struct InflateParams *params) {
    assert(params);
    assert(params->avail_in);
    assert(params->size);
    assert(params->in);
    assert(params->out);

    params->strm.next_in = params->in;
    params->strm.avail_in = params->avail_in;
    params->strm.zalloc = NULL;
    params->strm.zfree = NULL;
    params->strm.opaque = NULL;

    inflateInit(&params->strm);

    params->strm.avail_out = params->size;
    params->strm.next_out = params->out;

#if defined(NDEBUG)
    inflate(&params->strm, Z_FINISH);
#else
    assert(inflate(&params->strm, Z_FINISH));
#endif

    return 0;
}

void comp_deflate_end(struct DeflateParams *params) {
    assert(params);
    deflateEnd(&params->strm);
}

void comp_inflate_end(struct InflateParams *params) {
    assert(params);
    inflateEnd(&params->strm);
}