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/** BEGIN COPYRIGHT BLOCK
* Copyright 2001 Sun Microsystems, Inc.
* Portions copyright 1999, 2001-2003 Netscape Communications Corporation.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifndef __usi_h
#define __usi_h
/*
* Description (usi.h)
*
* This file defines the interface to an unsigned integer datatype.
* Unsigned integers are used to represent object identifiers of
* various sorts, including user ids and group ids. Functions
* for manipulating lists of USIs are also provided in this
* interface.
*/
/* Define a type to contain an unsigned integer value */
typedef unsigned int USI_t;
/* Define a type to describe a list of USI_t values */
typedef struct USIList_s USIList_t;
struct USIList_s {
int uil_count; /* number of active values in list */
int uil_size; /* current size of list area in USI_t */
USI_t * uil_list; /* pointer to array of values */
};
/* Define macro to initialize a USIList_t structure */
#define UILINIT(uilptr) \
{ \
(uilptr)->uil_count = 0; \
(uilptr)->uil_size = 0; \
(uilptr)->uil_list = 0; \
}
/* Define a macro to replace the contents of one USIList_t with another's */
#define UILREPLACE(dst, src) \
{ \
if ((dst)->uil_size > 0) { \
FREE((dst)->uil_list); \
} \
(dst)->uil_count = (src)->uil_count; \
(dst)->uil_size = (src)->uil_size; \
(dst)->uil_list = (src)->uil_list; \
(src)->uil_count = 0; \
(src)->uil_size = 0; \
(src)->uil_list = 0; \
}
/* Define a variation of UILINIT() that frees any allocated space */
#define UILFREE(uilptr) \
{ \
if ((uilptr)->uil_size > 0) { \
FREE((uilptr)->uil_list); \
} \
(uilptr)->uil_count = 0; \
(uilptr)->uil_size = 0; \
(uilptr)->uil_list = 0; \
}
/* Define a macro to extract the current number of items in a USIList_t */
#define UILCOUNT(uilptr) ((uilptr)->uil_count)
/* Define a macro to return a pointer to the array of values */
#define UILLIST(uilptr) ((uilptr)->uil_list)
NSPR_BEGIN_EXTERN_C
/* Define functions in usi.c */
extern USI_t * usiAlloc(USIList_t * uilptr, int count);
extern int usiInsert(USIList_t * uilptr, USI_t usi);
extern int usiPresent(USIList_t * uilptr, USI_t usi);
extern int usiRemove(USIList_t * uilptr, USI_t usi);
extern int uilDuplicate(USIList_t * dstptr, USIList_t * srcptr);
extern int uilMerge(USIList_t * dstptr, USIList_t * srcptr);
NSPR_END_EXTERN_C
#endif /* __usi_h */
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