#include <assert.h>
#include <string.h>
#include <stdlib.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 *my_malloc(size_t size, const char *text) {
  void *ptr;
  ptr=calloc(1,size);
/*  printf("new %s %X %d\n", text, ptr, size); */
  return(ptr);
}

void my_free(void *ptr) {
/*  printf("my_free %X\n", ptr); */
  free(ptr);
}

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;
}

void ErrSetOutFile(FILE *arg) {
  outrtn=ErrOutFil;
  outarg=arg;
}

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

void err_show_(char *text, int length) {
  char buf[256];

  if (length>=256) length=255;
  strncpy(buf, text, length);
  buf[length]='\0';  
  ErrWrite(buf);
}

#ifdef __VMS

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

void err_show(Desc *desc) {
  err_show_(desc->text, desc->size);
}

#endif

void errsetoutrtn_(void (*rtn)(), void *arg) {
  ErrSetOutRtn(rtn, arg);
}