+++ /dev/null
-/* -*-c-*-
- *
- * Manipulation of timeval structures
- *
- * (c) 1998 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of the mLib utilities library.
- *
- * mLib is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * mLib is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with mLib; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#ifndef MLIB_TV_H
-#define MLIB_TV_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <sys/time.h>
-
-/*----- A macro to make reading easier ------------------------------------*/
-
-#define MILLION 1000000
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @tv_add@ --- *
- *
- * Arguments: @struct timeval *dst@ = destination block
- * @const struct timeval *a, *b@ = source blocks
- *
- * Returns: ---
- *
- * Use: Adds two timevals.
- */
-
-extern void tv_add(struct timeval */*dst*/,
- const struct timeval */*a*/,
- const struct timeval */*b*/);
-
-#define TV_ADD(dst, a, b) TV_ADDL(dst, a, (b)->tv_sec, (b)->tv_usec)
-
-/* --- @tv_addl@ --- *
- *
- * Arguments: @struct timeval *dst@ = destination block
- * @const struct timeval *a@ = source blocks
- * @time_t sec@, @unsigned long usec@ = time to add
- *
- * Returns: ---
- *
- * Use: Adds a literal time in seconds and microseconds.
- */
-
-extern void tv_addl(struct timeval */*dst*/,
- const struct timeval */*a*/,
- time_t /*sec*/, unsigned long /*usec*/);
-
-#define TV_ADDL(dst, a, sec, usec) do { \
- (dst)->tv_sec = (a)->tv_sec + (sec); \
- (dst)->tv_usec = (a)->tv_usec + (usec); \
- if ((dst)->tv_usec >= MILLION) { \
- (dst)->tv_usec -= MILLION; \
- (dst)->tv_sec++; \
- } \
-} while (0)
-
-/* --- @tv_sub@ --- *
- *
- * Arguments: @struct timeval *dst@ = destination block
- * @const struct timeval *a, *b@ = source blocks
- *
- * Returns: ---
- *
- * Use: Subtracts two timevals.
- */
-
-extern void tv_sub(struct timeval */*dst*/,
- const struct timeval */*a*/,
- const struct timeval */*b*/);
-
-#define TV_SUB(dst, a, b) TV_SUBL(dst, a, (b)->tv_sec, (b)->tv_usec)
-
-/* --- @tv_subl@ --- *
- *
- * Arguments: @struct timeval *dst@ = destination block
- * @const struct timeval *a@ = source blocks
- * @time_t sec@, @unsigned long usec@ = time to subtract
- *
- * Returns: ---
- *
- * Use: Subtracts a literal time in seconds and microseconds.
- */
-
-extern void tv_subl(struct timeval */*dst*/,
- const struct timeval */*a*/,
- time_t /*sec*/, unsigned long /*usec*/);
-
-#define TV_SUBL(dst, a, sec, usec) do { \
- (dst)->tv_sec = (a)->tv_sec - (sec); \
- if ((a)->tv_usec >= (usec)) \
- (dst)->tv_usec = (a)->tv_usec - (usec); \
- else { \
- (dst)->tv_usec = (a)->tv_usec + MILLION - (usec); \
- (dst)->tv_sec--; \
- } \
-} while (0)
-
-/* --- @tv_cmp@ --- *
- *
- * Arguments: @const struct timeval *a, *b@ = source blocks
- *
- * Returns: Less than, equal to, or greater than zero.
- *
- * Use: Compares two timevals.
- */
-
-extern int tv_cmp(const struct timeval */*a*/,
- const struct timeval */*b*/);
-
-#define TV_CMP(a, op, b) ((a)->tv_sec == (b)->tv_sec ? \
- (a)->tv_usec op (b)->tv_usec : \
- (a)->tv_sec op (b)->tv_sec)
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif