#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#include "err_handling.h"

#define SLEN 64
#define MLEN 64

static char *txt[SLEN];
static int sp=0;

int ErrCode;
char *ErrMessage=NULL;
void (*outrtn)()=NULL;
void *outarg;

void ErrTxt(char *text, int systemError)
{
  if (systemError) { sp=0; ErrCode=errno; ErrMessage=strerror(errno); }
  if (sp<SLEN) {
    txt[sp++]=text;
  }
}

void ErrMsg(char *msg)
{
  ErrCode=-1;
  ErrMessage=msg; sp=0;
}

void ErrCod(int code)
{
  ErrCode=code;
  ErrMessage=strerror(code); sp=0;
}

void ErrOutFil(void *arg, char *text) {
  fprintf((FILE *)arg, "%s\n", text);
}

void ErrWrite(char *text)
{
  int i, l;
  char buf[256];

  if (outrtn==NULL) {
    outrtn=ErrOutFil;
    outarg=stdout;
  }
  l=strlen(text)+strlen(ErrMessage)+6;
  assert(l<256);
  sprintf(buf, "--- %s: %s", text, ErrMessage);
  for (i=0;i<sp;i++) {
    if (txt[i][0]==':') {
      l+=strlen(txt[i]);
      assert(l<256);
      strcat(buf, &(txt[i][1]));
    } else {
      outrtn(outarg, buf);
      l=strlen(txt[i]);
      assert(l<256);
      strcpy(buf, txt[i]);
    }
  }
  outrtn(outarg, buf);
  outrtn(outarg, "");
}

void ErrSetOutRtn(void (*rtn)(), void *arg) {
  outrtn=rtn;
  outarg=arg;
}

#ifdef __VMS

typedef struct { short size, dummy; char *text; } Desc;

void ErrShowVms(Desc *desc, void (*outrtn)(), void *arg) {
  char buf[256];
  int l;

  l=desc->size;
  if (l>=256) l=255;
  strncpy(buf, desc->text, l);
  buf[l]='\0';  
  ErrWrite(buf);
}

#endif

void ERR_EXIT(char *text) {
  ErrWrite(text); exit(1);
}