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/*

 * output.c -- output to file on host system

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "common.h"

#include "console.h"

#include "error.h"

#include "output.h"

static FILE *outputFile;

Word outputRead(Word addr) {

  if (outputFile == NULL) {

    /* output device not installed */

    error("output device not installed");

  }

  /* output device always returns 0 on read */

  return 0;

}

void outputWrite(Word addr, Word data) {

  char c;

  if (outputFile == NULL) {

    /* output device not installed */

    error("output device not installed");

  }

  c = data;

  if (fwrite(&c, 1, 1, outputFile) != 1) {

    error("write error on output device");

  }

}

void outputReset(void) {

  if (outputFile == NULL) {

    /* output device not installed */

    return;

  }

  cPrintf("Resetting output device...\n");

  fseek(outputFile, 0, SEEK_SET);

}

void outputInit(char *outputFileName) {

  if (outputFileName == NULL) {

    /* do not install output device */

    outputFile = NULL;

  } else {

    /* try to install output device */

    outputFile = fopen(outputFileName, "wb");

    if (outputFile == NULL) {

      error("cannot open output device file '%s'", outputFileName);

    }

    setvbuf(outputFile, NULL, _IONBF, 0);

  }

  outputReset();

}

void outputExit(void) {

  if (outputFile == NULL) {

    /* output device not installed */

    return;

  }

  fclose(outputFile);

}