#include #include #include double e_change_to_(char *p) { double b=0; int f=1,s=-1,i,exp=0; if(*p=='-')f=-1,p++; while(*p!='e'&&*p!='E') { if(*p=='.'){ s=1; }else{ if(s<0){ b=b*10+*p-48; } else { if(*p=='.')p++; s*=10; b+=(double)(*p-48)/s; } } p++; } b*=f; if(*(++p)=='-'){ s=-1,p++; }else{ if(*p=='+') p++,s=1; else s=1; } do exp=exp*10+*p-48;while(*(++p)); if(s>0){ for(i=0;i>(7-m) ) & 1 ) << m; } } cdata[0] ^= 0xff; cdata[1] ^= 0xff; for(uint32_t i = 0; i < len; i++) { data_t ^= cdata[i]<<8; //8-bit data for (uint8_t j = 0; j < 8; j++) { if (data_t & 0x8000) data_t = (data_t << 1) ^ crc_poly; else data_t <<= 1; } } uint16_t i_data_t = 0; for(uint8_t n=0; n<=15; n++) { i_data_t |= ( ( data_t>>(15-n) ) & 1 ) << n; } return i_data_t ^ 0xFFFF; } #include #include #include #include #define MASK "255.255.0.255." int dealMask(int x,int *buf,int ret){ int i = ret * 8; while( (x/2) !=0 ) { buf[i-1] = x%2; x = x/2; i--; } buf[i-1] = x%2; return i; } int transer(char *mark){ char temp[8] = {0}; int buf[32] = {0}; char *str = temp; char *head = mark; int count = 0; int ret = 1; int i = 0; int j = 0; while(*head != '\0'){ *str = *head; if(*(head+1) == '.'|| *(head+1)== '\0'){ head = head +2; dealMask(atoi(temp),buf,ret); ret++; memset(temp,0,sizeof(temp)); str = temp; continue; } str++; head++; } for(i = 1;i <33;i++){ if(buf[i-1] == 1){ j++; } // printf("%d",buf[i-1]); // if((i%8) == 0){ // printf("\n"); // } } printf("%d\n",j); } #include #include #include uint32_t return_7_day_time(void) { char data_str[128]; time_t now; // 声明time_t类型变量 now = time(NULL); // 获取系统日期和时间 now = now - 7 * 24 * 60 * 60; struct tm *t = localtime(&now); //获取当地日期和时间 snprintf(data_str, sizeof(data_str), "%d%02d%02d", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday); printf("\n----------return_7_day_time[%s]\n", data_str); return atoi(data_str); } #define MAX_FILENAME_LENGTH 512U int dirWalk(char* dirpath) { // Bad address if (!dirpath || !strlen(dirpath)) { return 0; } // 获得目录结构体指针 DIR* pDir = opendir(dirpath); if (pDir == NULL) { return 0; } // 遍历该目录下文件，遇到目录则递归遍历 int err = 0; struct dirent* ent; while (ent = readdir(pDir)) { // 目录，递归 if (ent->d_type == DT_DIR) { if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) { continue; } // 判断目标路径是否过长 if (strlen(dirpath) + ent->d_reclen + 1 >= MAX_FILENAME_LENGTH) { return 0; } // 拼接出目标目录的路径 char nextDirPath[MAX_FILENAME_LENGTH]; sprintf(nextDirPath, "%s/%s", dirpath, ent->d_name); printf("nextDirPath: %s\n", nextDirPath); // 递归访问该目录 err = dirWalk(nextDirPath); memset(nextDirPath, 0, MAX_FILENAME_LENGTH); if (err != 0) break; } // 普通文件 else if (ent->d_type == DT_REG) { printf(">> %s\n", ent->d_name); if (err != 0) break; } } closedir(pDir); return err; } static uint8_t oem_u[256]; static uint8_t oem_ul = 0; //---提取参考周与参考秒的函数 void GPS_time_week_second(char* str, int len, uint32_t *week, uint32_t *second) { int i = 0; for(i = 0; i < len; i++, oem_ul++){ oem_u[oem_ul] = str[i]; //查找二进制头数据------------ // printf("%02x ", oem_u[oem_ul]&0xff); if(oem_u[(uint8_t) (oem_ul - 19)] == 0xaa && oem_u[(uint8_t) (oem_ul - 18)] == 0x44 && oem_u[(uint8_t) (oem_ul - 17)] == 0x12 && oem_u[(uint8_t) (oem_ul - 16)] == 0x1c ){ //匹配到数据头 提取周数和秒数 *second = (((oem_u[(uint8_t) (oem_ul - 0)] & 0xff) << 24) + ((oem_u[(uint8_t) (oem_ul - 1)] & 0xff) << 16) + ((oem_u[(uint8_t) (oem_ul - 2)] & 0xff) << 8) + ((oem_u[(uint8_t) (oem_ul - 3)] & 0xff) << 0))/1000; *week = ((oem_u[(uint8_t) (oem_ul - 4)] & 0xff) << 8) + ((oem_u[(uint8_t) (oem_ul - 5)] & 0xff) << 0); *week = (*week); printf("week:%u second:%u[%02x%02x%02x%02x][%02x%02x]\n", *week, *second, oem_u[(uint8_t) (oem_ul - 0)], oem_u[(uint8_t) (oem_ul - 1)], oem_u[(uint8_t) (oem_ul - 2)], oem_u[(uint8_t) (oem_ul - 3)], oem_u[(uint8_t) (oem_ul - 4)], oem_u[(uint8_t) (oem_ul - 5)]); } } } // GPS时间是从1980年1月6日开始计算的 #define GPS_EPOCH_YEAR 1980 #define GPS_EPOCH_MONTH 1 #define GPS_EPOCH_DAY 6 #define SECONDS_PER_DAY (24*60*60) #define DAYS_PER_WEEK 7 #define SECONDS_PER_WEEK (SECONDS_PER_DAY * DAYS_PER_WEEK) void GPSTimeToCalendar(unsigned int week, unsigned int seconds, struct tm *calendarTime) { time_t gpsEpoch = 0; time_t gpsTime = 0; // 将GPS时代的开始转换为time_t（即自Unix纪元以来的秒数） struct tm epoch = {0}; epoch.tm_year = GPS_EPOCH_YEAR - 1900; // tm_year是从1900年开始的年数 epoch.tm_mon = GPS_EPOCH_MONTH - 1; // tm_mon是从0开始的月数 epoch.tm_mday = GPS_EPOCH_DAY; gpsEpoch = mktime(&epoch); // 将周数转换为秒数 gpsTime = gpsEpoch + week * SECONDS_PER_WEEK + seconds; // 将GPS时间转换为日历时间 if (gmtime_r(&gpsTime, calendarTime) == NULL) { // 错误处理 calendarTime->tm_year = 0; calendarTime->tm_mon = 0; calendarTime->tm_mday = 0; // 可以在这里添加错误处理逻辑 } } long getFileSize(FILE* file) { long size; fseek(file, 0, SEEK_END); size = ftell(file); fseek(file, 0, SEEK_SET); return size; } void ret_static_file_start_end_time(char* path, char*st, int len1, char*et, int len2) { char buf[4096*3] = {0}; uint32_t start_week = 0; //记录开始时间 uint32_t start_second = 0; uint64_t file_size = 0; uint32_t end_week = 0; //记录结束时间 uint32_t end_second = 0; int ret = 0; struct tm calendarTime = {0}; int flag = 0; FILE *fp = fopen(path, "r"); if (fp == NULL) { printf("文件打开失败\n"); return; } file_size = getFileSize(fp); printf("\n---file size = [%d]\n", file_size); while ((ret = fread(buf, 1, sizeof(buf), fp)) > 0) { // 处理读取到的数据 // 例如，可以将数据打印为十六进制（这里为了简单起见，省略了具体处理逻辑） GPS_time_week_second(buf, ret, &end_week, &end_second); if(flag == 0){ start_week = end_week; start_second = end_second; flag = 1; #if 1 if(file_size > 33333){ //文件太大 反过来查找 printf("\nthis is a big file\n"); fseek(fp,-10000L,2); } #endif } } GPSTimeToCalendar(start_week, start_second, &calendarTime); snprintf(st, len1, "%d-%02d-%02d %02d:%02d:%02d", calendarTime.tm_year + 1900, calendarTime.tm_mon + 1, calendarTime.tm_mday, calendarTime.tm_hour, calendarTime.tm_min, calendarTime.tm_sec); printf("start_week:%d start_second:%d [%s]\n", start_week, start_second, st); GPSTimeToCalendar(end_week, end_second, &calendarTime); snprintf(et, len2, "%d-%02d-%02d %02d:%02d:%02d", calendarTime.tm_year + 1900, calendarTime.tm_mon + 1, calendarTime.tm_mday, calendarTime.tm_hour, calendarTime.tm_min, calendarTime.tm_sec); printf("end_week:%d end_second:%d [%s]\n", end_week, end_second, et); a if (ferror(fp)) { perror("Error reading file"); } fclose(fp); fp = NULL; } int main() { short t1 = -8; unsigned int t2 = 0; unsigned int t3 = 0; char c1[50]; snprintf(c1, 50,"%u", t1); t3 = strtoul(c1,NULL, 10); printf("t1 = [%.x][%s][%.x]", t1, c1, t3); printf("\n end \n"); return 0; char d_str[] = {0x24,0x1d,0x9f,0x01,0x00,0x00,0xc0,0xff}; char d_str1[] = {0x00,0x00,0x00,0x00,0x00,0x00,0xf8,0x7f}; printf("\n d_str:[%.16lf] \n", *((double*)d_str1)); return 0; char startTime[256]; char end_time[256]; ret_static_file_start_end_time("1_rover_202411300249.DAT", startTime, sizeof(startTime), end_time, sizeof(end_time)); return 0; }