/*
 * Reads trace output, printing only output for which cwp has a
 *  particular value.
 *
 * Usage: $0 [flags] value
 *
 * value is passed to atoi; the result is the cwp value this program
 *  looks for.
 */

#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdint.h>
//#include <strings.h>

extern const char *__progname;

static int cwp;
static int wantcwp;

#define Cisdigit(x) isdigit((unsigned char)(x))

static void setup(int ac, char **av)
{
 int i;
 int errs;

 errs = 0;
 while ((ac >= 2) && (av[1][0] == '-'))
  { i = 1;
    fprintf(stderr,"%s: unrecognized flag `%s'\n",__progname,av[1]);
    errs = 1;
    ac -= i;
    av += i;
  }
 if (ac != 2)
  { fprintf(stderr,"Usage: %s [flags] value\n",__progname);
    exit(1);
  }
 cwp = -1;
 wantcwp = atoi(av[1]);
}

static int want(const char *s0)
{
 const char *s;
 int w;

 s = s0;
 while (*s && Cisdigit(*s)) s ++;
 if (*s++ != ':') return(wantcwp==cwp);
 if (*s++ != ' ') return(wantcwp==cwp);
 while (*s && Cisdigit(*s)) s ++;
 if (*s++ != ':') return(wantcwp==cwp);
 if (*s++ != ' ') return(wantcwp==cwp);
 if ((s[0] != 'c') || (s[1] != 'h') || (s[2] != 'g')) return(wantcwp==cwp);
 s += 3;
 w = (wantcwp == cwp);
 while (1)
  { while (*s == ' ') s ++;
    if (! *s) break;
    if ((s[0] == 'c') && (s[1] == 'w') && (s[2] == 'p') && (s[3] == '='))
     { cwp = atoi(s+4);
       break;
     }
    while (*s && (*s != ' ')) s ++;
  }
 return(w||(wantcwp==cwp));
}

static void process(void)
{
 char *b;
 int l;
 int a;
 int c;

 b = 0;
 a = 0;
 l = 0;
 while (1)
  { c = getchar();
    if (c == EOF)
     { if (l > 0) fprintf(stderr,"%s: partial line ignored at end of input\n",__progname);
       break;
     }
    if (l >= a) b = realloc(b,a=l+8);
    b[l++] = c;
    if (c == '\n')
     { b[--l] = '\0';
       if (want(b))
	{ printf("%s\n",b);
	}
       l = 0;
     }
  }
 free(b);
}

int main(int, char **);
int main(int ac, char **av)
{
 setup(ac,av);
 process();
 return(0);
}