trunk/masters-pmf/java_speed_test/c/main.c

   1 #include <sys/types.h>
   2 #include <sys/stat.h>
   3 #include <fcntl.h>
   4 #include <unistd.h>
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 int main(int argc, char **argv)
  11 {
  12         int result;
  13         int fd;
  14         int print = 0;
  15
  16         if(argc >= 2 && !strcmp(argv[1], "-p"))
  17                 print = 1;
  18
  19         result = fd = open("../trace.dat", O_RDONLY);
  20         if(result == -1) {
  21                 perror("open");
  22                 return 1;
  23         }
  24
  25         while(1) {
  26                 unsigned long timestamp;
  27                 unsigned short id;
  28                 unsigned char arglen;
  29                 char *args;
  30
  31                 result = read(fd, &timestamp, 4);
  32                 if(result == 0)
  33                         break;
  34                 if(result < 4) {
  35                         perror("read");
  36                         return 1;
  37                 }
  38
  39                 result = read(fd, &id, 2);
  40                 if(result < 2) {
  41                         perror("read");
  42                         return 1;
  43                 }
  44
  45                 result = read(fd, &arglen, 1);
  46                 if(result < 1) {
  47                         perror("read");
  48                         return 1;
  49                 }
  50
  51                 args = malloc(arglen);
  52
  53                 result = read(fd, args, arglen);
  54                 if(result < arglen) {
  55                         perror("read");
  56                         return 1;
  57                 }
  58
  59                 unsigned short arg1;
  60                 char *arg2;
  61
  62                 arg1 = *(unsigned short *)args;
  63                 arg2 = args+2;
  64
  65                 if(print)
  66                         printf("timestamp %lu id %hu args=(arg1=%hu arg2=\"%s\")\n", timestamp, id, arg1, arg2);
  67
  68                 free(args);
  69         }
  70         close(fd);
  71
  72         return 0;
  73 }