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Tasmota/tasmota/xdrv_52_9_berry.ino

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/*
xdrv_52_9_berry.ino - Berry scripting language
Copyright (C) 2021 Stephan Hadinger, Berry language by Guan Wenliang https://github.com/Skiars/berry
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_BERRY
#define XDRV_52 52
#include <berry.h>
const char kBrCommands[] PROGMEM = D_PRFX_BR "|" // prefix
D_CMND_BR_RUN "|" D_CMND_BR_RESET
;
void (* const BerryCommand[])(void) PROGMEM = {
CmndBrRun, CmndBrReset,
};
class BerrySupport {
public:
bvm *vm = nullptr; // berry vm
bool rules_busy = false; // are we already processing rules, avoid infinite loop
const char *fname = nullptr; // name of berry function to call
int32_t fret = 0;
};
BerrySupport berry;
//
// Sanity Check for be_top()
//
// Checks that the Berry stack is empty, if not print a Warning and empty it
//
void checkBeTop(void) {
int32_t top = be_top(berry.vm);
if (top != 0) {
be_pop(berry.vm, top); // TODO should not be there
AddLog(LOG_LEVEL_ERROR, D_LOG_BERRY "Error be_top is non zero=%d", top);
}
}
/*********************************************************************************************\
* Handlers for Berry calls and async
*
\*********************************************************************************************/
// // call a function (if exists) of type void -> void
// void callBerryFunctionVoid_berry(const char * fname) {
// berry.fret = 0;
// callBerryFunctionVoid(berry.fname);
// }
bool callBerryRule(void) {
if (berry.rules_busy) { return false; }
berry.rules_busy = true;
char * json_event = TasmotaGlobal.mqtt_data;
bool serviced = false;
checkBeTop();
be_getglobal(berry.vm, "_exec_rules");
if (!be_isnil(berry.vm, -1)) {
// {
// String event_saved = TasmotaGlobal.mqtt_data;
// // json_event = {"INA219":{"Voltage":4.494,"Current":0.020,"Power":0.089}}
// // json_event = {"System":{"Boot":1}}
// // json_event = {"SerialReceived":"on"} - invalid but will be expanded to {"SerialReceived":{"Data":"on"}}
// char *p = strchr(json_event, ':');
// if ((p != NULL) && !(strchr(++p, ':'))) { // Find second colon
// event_saved.replace(F(":"), F(":{\"Data\":"));
// event_saved += F("}");
// // event_saved = {"SerialReceived":{"Data":"on"}}
// }
// be_pushstring(berry.vm, event_saved.c_str());
// }
be_pushstring(berry.vm, TasmotaGlobal.mqtt_data);
int ret = be_pcall(berry.vm, 1);
serviced = be_tobool(berry.vm, 1);
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "Event (%s) serviced=%d"), TasmotaGlobal.mqtt_data, serviced);
be_pop(berry.vm, 2); // remove function object
} else {
be_pop(berry.vm, 1); // remove nil object
}
checkBeTop();
berry.rules_busy = false;
return serviced; // TODO event not handled
}
bool callBerryCommand(void) {
bool serviced = false;
checkBeTop();
be_getglobal(berry.vm, "_exec_cmd");
if (!be_isnil(berry.vm, -1)) {
be_pushstring(berry.vm, XdrvMailbox.topic);
be_pushint(berry.vm, XdrvMailbox.index);
be_pushstring(berry.vm, XdrvMailbox.data);
int ret = be_pcall(berry.vm, 3);
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: top=%d", be_top(berry.vm));
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: type(1)=%s", be_typename(berry.vm, 1));
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: type(2)=%s", be_typename(berry.vm, 2));
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: type(3)=%s", be_typename(berry.vm, 3));
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: type(4)=%s", be_typename(berry.vm, 4));
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: type(5)=%s", be_typename(berry.vm, 5));
serviced = be_tobool(berry.vm, 1); // return value is in slot 1
// AddLog(LOG_LEVEL_INFO, "callBerryCommand: serviced=%d", serviced);
be_pop(berry.vm, 4); // remove function object
} else {
be_pop(berry.vm, 1); // remove nil object
}
checkBeTop();
return serviced; // TODO event not handled
}
size_t callBerryGC(void) {
size_t ram_used = 0;
checkBeTop();
be_getglobal(berry.vm, "_gc");
if (!be_isnil(berry.vm, -1)) {
int ret = be_pcall(berry.vm, 0);
ram_used = be_toint(berry.vm, 1);
be_pop(berry.vm, 1); // remove function object
} else {
be_pop(berry.vm, 1); // remove nil object
}
checkBeTop();
return ram_used;
}
// void callBerryMqttData(void) {
// AddLog(LOG_LEVEL_INFO, D_LOG_BERRY "callBerryMqttData");
// if (nullptr == berry.vm) { return; }
// if (XdrvMailbox.data_len < 1) {
// return;
// }
// const char * topic = XdrvMailbox.topic;
// const char * payload = XdrvMailbox.data;
// checkBeTop();
// be_getglobal(berry.vm, "mqtt_data_dispatch");
// if (!be_isnil(berry.vm, -1)) {
// be_pushstring(berry.vm, topic);
// be_pushstring(berry.vm, payload);
// be_pcall(berry.vm, 0);
// be_pop(berry.vm, 3); // remove function object
// } else {
// be_pop(berry.vm, 1); // remove nil object
// }
// checkBeTop();
// }
// call a function (if exists) of type void -> void
void callBerryFunctionVoid(const char * fname) {
if (nullptr == berry.vm) { return; }
checkBeTop();
be_getglobal(berry.vm, fname);
if (!be_isnil(berry.vm, -1)) {
be_pcall(berry.vm, 0);
}
be_pop(berry.vm, 1); // remove function or nil object
checkBeTop();
}
/*********************************************************************************************\
* VM Observability
\*********************************************************************************************/
void BerryObservability(bvm *vm, int32_t event...);
void BerryObservability(bvm *vm, int32_t event...) {
va_list param;
va_start(param, event);
static int32_t vm_usage = 0;
static uint32_t gc_time = 0;
switch (event) {
case BE_OBS_GC_START:
{
gc_time = millis();
vm_usage = va_arg(param, int32_t);
}
break;
case BE_OBS_GC_END:
{
int32_t vm_usage2 = va_arg(param, int32_t);
uint32_t gc_elapsed = millis() - gc_time;
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "GC from %i to %i bytes (in %d ms)"), vm_usage, vm_usage2, gc_elapsed);
}
break;
default: break;
}
va_end(param);
}
/*********************************************************************************************\
* VM Init
\*********************************************************************************************/
extern "C" {
extern size_t be_gc_memcount(bvm *vm);
extern void be_gc_collect(bvm *vm);
}
void BrReset(void) {
// clean previous VM if any
if (berry.vm != nullptr) {
be_vm_delete(berry.vm);
berry.vm = nullptr;
}
int32_t ret_code1, ret_code2;
bool berry_init_ok = false;
do {
berry.vm = be_vm_new(); /* create a virtual machine instance */
be_set_obs_hook(berry.vm, &BerryObservability);
// AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "Berry VM created, RAM used=%u"), be_gc_memcount(berry.vm));
// Register functions
be_regfunc(berry.vm, PSTR("log"), l_logInfo);
be_regfunc(berry.vm, PSTR("save"), l_save);
// AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "Berry function registered, RAM used=%u"), be_gc_memcount(berry.vm));
ret_code1 = be_loadstring(berry.vm, berry_prog);
if (ret_code1 != 0) {
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_BERRY "ERROR: be_loadstring [%s] %s"), be_tostring(berry.vm, -2), be_tostring(berry.vm, -1));
be_pop(berry.vm, 2);
break;
}
// AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "Berry code loaded, RAM used=%u"), be_gc_memcount(berry.vm));
ret_code2 = be_pcall(berry.vm, 0);
if (ret_code1 != 0) {
AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_BERRY "ERROR: be_pcall [%s] %s"), be_tostring(berry.vm, -2), be_tostring(berry.vm, -1));
be_pop(berry.vm, 2);
break;
}
// AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_BERRY "Berry code ran, RAM used=%u"), be_gc_memcount(berry.vm));
be_pop(berry.vm, 1);
be_gc_collect(berry.vm);
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_BERRY "Berry initialized, RAM used=%u"), callBerryGC());
// AddLog(LOG_LEVEL_INFO, PSTR("Delete Berry VM"));
// be_vm_delete(vm);
// AddLog(LOG_LEVEL_INFO, PSTR("After Berry"));
berry_init_ok = true;
} while (0);
if (!berry_init_ok) {
// free resources
if (berry.vm != nullptr) {
be_vm_delete(berry.vm);
berry.vm = nullptr;
}
}
}
/*********************************************************************************************\
* Tasmota Commands
\*********************************************************************************************/
//
// Command `BrRun`
//
void CmndBrRun(void) {
int32_t ret_code;
const char * ret_type, * ret_val;
if (berry.vm == nullptr) { ResponseCmndChar_P(PSTR(D_BR_NOT_STARTED)); return; }
char br_cmd[XdrvMailbox.data_len+12];
// encapsulate into a function, copied from `be_repl.c` / `try_return()`
snprintf_P(br_cmd, sizeof(br_cmd), PSTR("return (%s)"), XdrvMailbox.data);
checkBeTop();
do {
// First try with the `return ()` wrapper
ret_code = be_loadbuffer(berry.vm, PSTR("input"), br_cmd, strlen(br_cmd));
if (be_getexcept(berry.vm, ret_code) == BE_SYNTAX_ERROR) {
be_pop(berry.vm, 2); // remove exception values
// if fails, try the direct command
ret_code = be_loadbuffer(berry.vm, PSTR("input"), XdrvMailbox.data, strlen(XdrvMailbox.data));
}
if (0 != ret_code) break;
ret_code = be_pcall(berry.vm, 0); // execute code
} while (0);
if (0 == ret_code) {
// AddLog(LOG_LEVEL_INFO, "run: top=%d", be_top(berry.vm));
// AddLog(LOG_LEVEL_INFO, "run: type(1)=%s", be_typename(berry.vm, 1));
// AddLog(LOG_LEVEL_INFO, "run: type(2)=%s", be_typename(berry.vm, 2));
// code taken from REPL, look first at top, and if nil, look at return value
if (!be_isnil(berry.vm, 1)) {
ret_val = be_tostring(berry.vm, 1);
} else {
ret_val = be_tostring(berry.vm, 2);
}
Response_P("{\"" D_PRFX_BR "\":\"%s\"}", EscapeJSONString(ret_val).c_str()); // can't use XdrvMailbox.command as it may have been overwritten by subcommand
be_pop(berry.vm, 1);
} else {
Response_P(PSTR("{\"" D_PRFX_BR "\":\"[%s] %s\"}"), EscapeJSONString(be_tostring(berry.vm, -2)).c_str(), EscapeJSONString(be_tostring(berry.vm, -1)).c_str());
be_pop(berry.vm, 2);
}
checkBeTop();
}
//
// Command `BrReset`
//
void CmndBrReset(void) {
if (berry.vm == nullptr) { ResponseCmndChar_P(PSTR(D_BR_NOT_STARTED)); return; }
BrReset();
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv52(uint8_t function)
{
bool result = false;
switch (function) {
//case FUNC_PRE_INIT:
case FUNC_INIT:
BrReset();
break;
case FUNC_EVERY_50_MSECOND:
callBerryFunctionVoid(PSTR("_run_deferred"));
break;
case FUNC_EVERY_100_MSECOND:
callBerryFunctionVoid(PSTR("every_100ms"));
break;
case FUNC_EVERY_SECOND:
callBerryFunctionVoid(PSTR("every_second"));
break;
case FUNC_COMMAND:
result = DecodeCommand(kBrCommands, BerryCommand);
if (!result) {
result = callBerryCommand();
}
break;
// case FUNC_SET_POWER:
// break;
case FUNC_RULES_PROCESS:
result = callBerryRule();
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_ADD_BUTTON:
break;
case FUNC_WEB_ADD_MAIN_BUTTON:
break;
case FUNC_WEB_ADD_HANDLER:
break;
#endif // USE_WEBSERVER
case FUNC_SAVE_BEFORE_RESTART:
break;
case FUNC_MQTT_DATA:
// callBerryMqttData();
break;
case FUNC_WEB_SENSOR:
break;
case FUNC_JSON_APPEND:
break;
case FUNC_BUTTON_PRESSED:
break;
case FUNC_LOOP:
break;
}
return result;
}
#endif // USE_BERRY
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