mirror of https://github.com/arendst/Tasmota.git
91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
/*
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xdrv_52_3_berry_unishox.ino - Berry scripting language, Unishox library
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Copyright (C) 2021 Stephan Hadinger, Berry language by Guan Wenliang https://github.com/Skiars/berry
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Mappgin from internal light and a generic `light_state` Berry class
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#ifdef USE_BERRY
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#ifdef USE_UNISHOX_COMPRESSION
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#include "be_mapping.h"
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#include <string.h>
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#include "unishox.h"
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extern Unishox compressor;
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extern "C" {
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/*********************************************************************************************\
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* Native functions mapped to Berry functions
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*
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* import unishox
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*
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*
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\*********************************************************************************************/
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int be_ntv_unishox_compress(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc == 1 && be_isstring(vm, 1)) {
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const char * s = be_tostring(vm, 1);
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// do a dry-run to know the compressed size
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int32_t compressed_size = compressor.unishox_compress(s, strlen(s), (char*) nullptr, 0);
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if (compressed_size < 0) {
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be_raise(vm, "internal_error", nullptr);
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}
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void * buf = be_pushbytes(vm, NULL, compressed_size);
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if (compressed_size > 0) {
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int32_t ret = compressor.unishox_compress(s, strlen(s), (char*) buf, compressed_size+5); // We expand by 4 the buffer size to avoid an error, but we are sure it will not overflow (see unishox implementation)
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if (ret < 0 || ret != compressed_size) {
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be_raisef(vm, "internal_error", "unishox size=%i ret=%i", compressed_size, ret);
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}
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}
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be_return(vm);
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}
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be_raise(vm, "type_error", nullptr);
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}
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int be_ntv_unishox_decompress(bvm *vm) {
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int32_t argc = be_top(vm); // Get the number of arguments
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if (argc == 1 && be_isbytes(vm, 1)) {
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size_t len;
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const void * buf = be_tobytes(vm, 1, &len);
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if (len == 0) {
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be_pushstring(vm, "");
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} else {
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int32_t decomp_size = compressor.unishox_decompress((const char*)buf, len, (char*) nullptr, 0);
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if (decomp_size < 0) {
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be_raise(vm, "internal_error", nullptr);
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}
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if (decomp_size == 0) {
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be_pushstring(vm, "");
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} else {
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void * buf_out = be_pushbuffer(vm, decomp_size);
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int32_t ret = compressor.unishox_decompress((const char*)buf, len, (char*) buf_out, decomp_size);
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if (ret < 0 || ret != decomp_size) {
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be_raisef(vm, "internal_error", "unishox size=%i ret=%i", decomp_size, ret);
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}
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be_pushnstring(vm, (const char*) buf_out, decomp_size);
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}
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}
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be_return(vm);
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}
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be_raise(vm, "type_error", nullptr);
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}
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}
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#endif // USE_UNISHOX_COMPRESSION
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#endif // USE_BERRY
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