MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

												#define _XOPEN_SOURCE // needed for strptime()								#include 				#include 				#include 				#include 				#include 								#include 								#include "bionet-util.h"												const char *bionet_resource_time_to_string_human_readable(const bionet_resource_t *resource) {				    static char time_str[200];								    char usec_str[10];				    struct tm *tm;				    int r;								    tm = gmtime((time_t *)&resource->time.tv_sec);				    if (tm == NULL) {				        return "invalid time";				    }								    r = strftime(time_str, sizeof(time_str), "%Y-%m-%d %T", tm);				    if (r 				        return "invalid time";				    }								    sprintf(usec_str, ".%06d", (int)resource->time.tv_usec);				    strcat(time_str, usec_str);								    return time_str;				}												const char *bionet_resource_time_to_string(const bionet_resource_t *resource) {				    static char time_str[100];								    sprintf(time_str, "%d.%06d", (int)resource->time.tv_sec, (int)resource->time.tv_usec);				    return time_str;				}												int bionet_resource_time_from_timeval(const struct timeval *tv, bionet_resource_t *resource) {				    if (resource == NULL) {				        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_timeval(): NULL resource passed in");				        return -1;				    }								    if (tv == NULL) {				        int r;								        r = gettimeofday(&resource->time, NULL);				        if (r < 0) {				            g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_timeval(): error getting time: %s", strerror(errno));				            return -1;				        }				        return 0;				    }								    resource->time.tv_sec  = tv->tv_sec;				    resource->time.tv_usec = tv->tv_usec;								    return 0;				}												int bionet_resource_time_from_string(const char *time_str, bionet_resource_t *resource) {				    int r;				    struct tm tm;				    char *p;								    if (resource == NULL) {				        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_string(): NULL resource passed in");				        return -1;				    }								    if (time_str == NULL) {				        r = gettimeofday(&resource->time, NULL);				        if (r < 0) {				            g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_string(): error getting time: %s", strerror(errno));				            return -1;				        }				        return 0;				    }												    // first try full time				    p = strptime(time_str, "%Y-%m-%d %T", &tm);				    if (p != NULL) {					resource->time.tv_sec = mktime(&tm);									r = sscanf(p, ".%6d", (int *)&resource->time.tv_usec);					if (r == 1) {					    return 0;					}				    }												    // then try .				    r = sscanf(time_str, "%d.%6d", (int *)&resource->time.tv_sec, (int *)&resource->time.tv_usec);				    if (r == 2) {				        return 0;				    }												    // finally try just 				    r = sscanf(time_str, "%d", (int *)&resource->time.tv_sec);				    resource->time.tv_usec = 0;				    if (r == 1) {				        return 0;				    }												    g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_string(): error parsing time from '%s'", time_str);				    return -1;				}												int bionet_resource_time_now(bionet_resource_t *resource) {				    int r;								    if (resource == NULL) {				        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_from_string(): NULL resource passed in");				        return -1;				    }								    r = gettimeofday(&resource->time, NULL);				    if (r < 0) {				        g_log(BIONET_LOG_DOMAIN, G_LOG_LEVEL_WARNING, "bionet_set_resource_time_now(): cannot get time: %s", strerror(errno));				        return -1;				    }								    return 0;				}