/* expand.c

   Compile with: gcc -g expand.c -lm -o expand
   Example run:  
         cluster infocon.hs2.a0.226.l5.list > infocon.hs2.a0.226.l5.c
         expand infocon.hs2.a0.226.l5.c > infocon.hs2.a0.226.l5.graph

   Performs point-to-point expansion of a "cluster" file (file of
   integer intervals).  Used to produce the block-graphs in Fig4 A,B,C,
   representing the regions reported by each of the methods along
   horizontal lines.
*/

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

#define Usage "%s <filename>\n" 
#define LARGE_NUMBER 99999999

void fatalf(char *msg, char *val);
FILE *ckopen(char *name, char *mode);
void *ckalloc(size_t amount);

int main(int argc, char *argv[]) {

 char  buffer[1000];
 int   k, i, from, to; 
 FILE *fp;

 if (argc!=2)  fatalf(Usage,argv[0]); 

 fp = ckopen(argv[1],"r");
  
 while (fgets(buffer,1000,fp)!=NULL) {
    if (!isdigit(buffer[0]))
        continue;
    sscanf(buffer, "%d %d", &from, &to);
    for (i=from; i<=to; i++)
         printf("%d\n", i);
 }          
 
 fclose(fp);
 return 0;
}


void fatal(char *msg)
{
        (void)fprintf(stderr, "%s\n", msg); 
        exit(1);
}               

void fatalf(char *msg, char *val)
{
        (void)fprintf(stderr, msg, val);
        (void)putc('\n', stderr);
        exit(1);
}


FILE *ckopen(char *name, char *mode)
{
        FILE *fp; 
 
        if ((fp = fopen(name, mode)) == NULL)
                fatalf("Cannot open %s.", name);
        return fp;
}           


void *ckalloc(size_t amount)
{
        void *p;
        
        if ((p = malloc(amount)) == NULL)
                fatal("Ran out of memory.");
        return p;
}