Fossil

/*
** The implementation of the TH core. This file contains the parser, and 
** the implementation of the interface in th.h.
*/

#include "th.h"
#include <string.h>
#include <assert.h>
#include <stdio.h> /* FILE class */

typedef struct Th_Command   Th_Command;
typedef struct Th_Frame     Th_Frame;
typedef struct Th_Variable  Th_Variable;

/*
** Interpreter structure.

}
void Th_Free(Th_Interp *pInterp, void *z){
  if( z ){
    pInterp->pVtab->xFree(z);
  }
}


int Th_Vtab_output( Th_Vtab *vTab, char const * zData, int nData ){
  if(!vTab->out.f){
    return -1;
  }else if(!vTab->out.enabled){
    return 0;
  }else{
    return vTab->out.f( zData, nData, vTab->out.pState );
  }
}


int Th_output( Th_Interp *pInterp, char const * zData, int nData ){
  return Th_Vtab_output( pInterp->pVtab, zData, nData );
}

int Th_output_f_FILE( char const * zData, int nData, void * pState ){
  FILE * dest = pState ? (FILE*)pState : stdout;
  int rc = (int)fwrite(zData, 1, nData, dest);
  fflush(dest);
  return rc;
}

/*
** Install a new th1 command. 
**
** If a command of the same name already exists, it is deleted automatically.
*/
int Th_CreateCommand(
  Th_Interp *interp,