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

#define TRUE true
#define FALSE false

// A consistent approach to error reporting is adopted and it
// involves specifying error severity and an appropriate message.
// errorKind describes the four severiy levels.  Message strings may be
// constructed dynamically and follows the formatted printf() string
// specification.

enum errorKind {WARNING, ERROR, ABORT, INTERNAL};
void error(errorKind, char *, ...);

// For example, a severe error without recovery options might be the
// failure to open the input specification file.  This can be specified
// as:
//      error(ABORT, "Cannot open specification file '%s'", argv[1]);

// Each error reported increments an error count and may be interrogated
// via the funciton errorsFound().  As in most compilers, the presence
// of errors disables further processing, eg code generation.

int errorsFound();

// Heap memory is allocated via a consistent interface function
// allocate() by specifying the heap size required.  Processing
// is aborted if there is insufficient free memory space.

char* allocate(int);