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
   9 int main()
  10 {
  11         int result;
  12         int fd;
  13
  14         result = fd = open("../trace.dat", O_RDONLY);
  15         if(result == -1) {
  16                 perror("open");
  17                 return 1;
  18         }
  19
  20         while(1) {
  21                 unsigned long timestamp;
  22                 unsigned short id;
  23                 unsigned char arglen;
  24                 char *args;
  25
  26                 result = read(fd, &timestamp, 4);
  27                 if(result == 0)
  28                         break;
  29                 if(result < 4) {
  30                         perror("read");
  31                         return 1;
  32                 }
  33
  34                 result = read(fd, &id, 2);
  35                 if(result < 2) {
  36                         perror("read");
  37                         return 1;
  38                 }
  39
  40                 result = read(fd, &arglen, 1);
  41                 if(result < 1) {
  42                         perror("read");
  43                         return 1;
  44                 }
  45
  46                 args = malloc(arglen);
  47
  48                 result = read(fd, args, arglen);
  49                 if(result < arglen) {
  50                         perror("read");
  51                         return 1;
  52                 }
  53
  54                 unsigned short arg1;
  55                 char *arg2;
  56
  57                 arg1 = *(unsigned short *)args;
  58                 arg2 = args+2;
  59
  60                 printf("timestamp %u id %hu args=(arg1=%hu arg2=\"%s\")\n", timestamp, id, arg1, arg2);
  61
  62                 free(args);
  63         }
  64         close(fd);
  65
  66         return 0;
  67 }