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#include "env_memory.h"

#include <stdio.h>

void env_memory::event()

{

  int lcl_cs;

  int ad;

  // ignore activity during reset

  if (!reset_n)

        return;

  if (!mreq_n && !wr_n && (addr < AM_DEPTH)) {

    ad = (int) addr;

    assert (memory != NULL);

    memory[ad] = (unsigned char) wr_data.read();

#ifdef DEBUG

    //printf ("MEM WR %04x=%02x\n", ad, (int) wr_data.read());

#endif

  }

  // async read output

  if (addr < AM_DEPTH) {

    ad = (int) addr;

    assert (memory != NULL);

    rd_data.write ( (unsigned int) memory[ad] );

  }

}

int inline readline(FILE *fh, char *buf)

{

        int c = 1, cnt = 0;

        if (feof(fh)) {

                *buf = (char) 0;

                return 0;

        }

        while (c) {

                c = fread (buf, 1, 1, fh);

                cnt++;

                if (c && (*buf == '\n')) {

                        buf++;

                        *buf = (char) 0;

                        c = 0;

                }

                else buf++;

        }

        return cnt;

}

/*

        line = ifh.readline()

        while (line != ''):

            if (line[0] == ':'):

                rlen = int(line[1:3], 16)

                addr = int(line[3:7], 16)

                rtyp = int(line[7:9], 16)

                ptr = 9

                for i in range (0, rlen):

                    laddr = addr + i

                    val = int(line[9+i*2:9+i*2+2], 16)

                    self.map[laddr] = val

                    self.bcount += 1

                    if (laddr > self.max): self.max = laddr

                    if (laddr < self.min): self.min = laddr

            line = ifh.readline()

 */

 void env_memory::load_ihex(char *filename)

{

        FILE *fh;

        char line[80];

    char *lp;

    int rlen, addr, rtyp, databyte;

    int rv;

    int dcount = 0;

        fh = fopen (filename, "r");

        rv = readline (fh, line);

    while (strlen(line) > 0) {

      //printf ("DEBUG: strlen(line)=%d rv=%d line=%s\n", strlen(line), rv, line);

      sscanf (line, ":%02x%04x%02x", &rlen, &addr, &rtyp);

      //printf ("DEBUG: rlen=%d addr=%d rtyp=%d\n", rlen, addr, rtyp);

      lp = line + 9;

      for (int c=0; c<rlen; c++) {

        sscanf (lp, "%02x", &databyte);

        lp += 2;

        //printf ("DEBUG: loaded mem[%04x]=%02x\n", addr+c, databyte);

        memory[addr+c] = databyte; dcount++;

      }

      rv = readline (fh, line);

    }

        fclose (fh);

        printf ("ENVMEM  : Read %d bytes from %s\n", dcount, filename);

}