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#ifndef UTILITY_H
#define UTILITY_H
#include <stdlib.h>
#include <string.h>
//#include <stdbool.h>
/*
* assumes the memory manager is libmm.a
* - allows malloc(0) or realloc(obj, 0)
* - catches out of memory (and calls MMout_of_memory())
* - catch free(0) and realloc(0, size) in the macros
*/
#define NIL(type) ((type *) 0)
#ifdef BWGC
#define ALLOC(type, num) \
((type *) gc_malloc(sizeof(type) * ((num)==0?1:(num))))
#define REALLOC(type, obj, num) \
(obj) ? ((type *) gc_realloc((char *) obj, sizeof(type) * ((num)==0?1:(num)))) : \
((type *) gc_malloc(sizeof(type) * ((num)==0?1:(num))))
#elif defined(CUSTOM_MALLOC)
#define ALLOC(type, num) \
((type *) CUSTOM_MALLOC(sizeof(type) * (num)))
#define REALLOC(type, obj, num) \
(obj) ? ((type *) CUSTOM_REALLOC((char *) obj, sizeof(type) * (num))) : \
((type *) CUSTOM_MALLOC(sizeof(type) * (num)))
#else
#include <stdlib.h>
#define ALLOC(type, num) \
((type *) malloc(sizeof(type) * (num)))
#define REALLOC(type, obj, num) \
(obj) ? ((type *) realloc((char *) obj, sizeof(type) * (num))) : \
((type *) malloc(sizeof(type) * (num)))
#endif
#ifdef IGNOREFREE
#define FREE(obj) \
{};
#elif defined(CUSTOM_FREE)
#define FREE(obj) \
if ((obj)) { (void) CUSTOM_FREE((char *) (obj)); (obj) = 0; }
#else
#define FREE(obj) \
if ((obj)) { (void) free((char *) (obj)); (obj) = 0; }
#endif
#include "ansi.h"
EXTERN long util_cpu_time
NULLARGS;
EXTERN char *util_path_search
ARGS((char *program));
EXTERN char *util_file_search
ARGS((char *file, char *path, char *mode));
EXTERN int util_pipefork
ARGS((char **argv, FILE **toCommand, FILE **fromCommand, int *pid));
EXTERN int util_csystem
ARGS((char *command));
EXTERN char *util_print_time
ARGS((long t));
EXTERN char *util_strsav
ARGS((char *ptr));
EXTERN char *util_tilde_expand
ARGS((char *filename));
EXTERN char *util_tilde_compress
ARGS((char *filename));
EXTERN void util_register_user
ARGS((char *user, char *directory));
#ifndef NIL_FN
#define NIL_FN(type) ((type (*)()) 0)
#endif /* NIL_FN */
#ifndef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif /* MAX */
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif /* MIN */
#ifndef ABS
#define ABS(a) ((a) > 0 ? (a) : -(a))
#endif /* ABS */
#ifdef lint
#undef ALLOC /* allow for lint -h flag */
#undef REALLOC
#define ALLOC(type, num) (((type *) 0) + (num))
#define REALLOC(type, obj, num) ((obj) + (num))
#endif /* lint */
#endif
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