gcode-canon/gcode-stacks.c at master · csdexter/gcode-canon · GitHub

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/*
 ============================================================================
 Name        : gcode-stacks.c
 Author      : Radu - Eosif Mihailescu
 Version     : 1.0 (2012-09-23)
 Copyright   : (C) 2012 Radu - Eosif Mihailescu <radu.mihailescu@linux360.ro>
 Description : G-Code Subroutine Parameter Stack Handling Code
 ============================================================================
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include "gcode-commons.h"
#include "gcode-stacks.h"
#include "gcode-debugcon.h"
#include "gcode-parameters.h"


static double *parametersStack[GCODE_MACRO_COUNT];
static TProgramPointer *programStack[GCODE_SUBPROGRAM_COUNT];
static uint8_t paSP, prSP;


bool init_stacks(void *data) {
  paSP = prSP = 0;

  GCODE_DEBUG("Stacks initialized, %d nested calls (%d of which macro-capable) supported",
              GCODE_SUBPROGRAM_COUNT, GCODE_MACRO_COUNT);

  return true;
}

bool stacks_push_parameters(void) {
  if(paSP < GCODE_MACRO_COUNT - 1) {
    double *params = (double *)malloc(sizeof(double) * 33);
    uint8_t i;

    for(i = 0; i < 33; i++) params[i] = fetch_parameter(i + 1);
    parametersStack[++paSP] = params;

    return true;
  } else return false;
}

bool stacks_push_program(const TProgramPointer *state) {
  if(prSP < GCODE_SUBPROGRAM_COUNT - 1) {
    TProgramPointer *pptr = (TProgramPointer *)malloc(sizeof(TProgramPointer));

    *pptr = *state;
    programStack[++prSP] = pptr;

    return true;
  } else return false;
}

bool stacks_pop_parameters(void) {
  if(paSP) {
    double *params = parametersStack[paSP--];
    uint8_t i;

    for(i = 0; i < 33; i++) update_parameter(i + 1, params[i]);
    free(params);
    commit_parameters();

    return true;
  } else return false;
}

bool stacks_pop_program(TProgramPointer *state) {
  if(prSP && state) {
    *state = *(programStack[prSP--]);
    free(programStack[prSP + 1]);

    return true;
  } else return false;
}

bool done_stacks(void) {
  GCODE_DEBUG("Stacks done");

  return true;
}