BSD 3 development

[unix-history] / usr / src / cmd / ssp.c

#include <stdio.h>
/*
* ssp - single space output
*
* Bill Joy UCB August 25, 1977
*
* Compress multiple empty lines to a single empty line.
* Option - compresses to nothing.
*/

char    poof, hadsome;

int     ibuf[256];


main(argc, argv)
       int argc;
       char *argv[];
{
       register int c;
       FILE *f;

       argc--, argv++;
       do {
               while (argc > 0 && argv[0][0] == '-') {
                       poof = 1;
                       argc--, argv++;
               }
       f = stdin;
               if (argc > 0) {
                       if ((f=fopen(argv[0], "r")) == NULL) {
                               fflush(f);
                               perror(argv[0]);
                               exit(1);
                       }
                       argc--, argv++;
               }
               for (;;) {
                       c = getc(f);
                       if (c == -1)
                               break;
                       if (c != '\n') {
                               hadsome = 1;
                               putchar(c);
                               continue;
                       }
                       /*
                        * Eat em up
                        */
                       if (hadsome)
                               putchar('\n');
                       c = getc(f);
                       if (c == -1)
                               break;
                       if (c != '\n') {
                               putchar(c);
                               hadsome = 1;
                               continue;
                       }
                       do
                               c = getc(f);
                       while (c == '\n');
                       if (!poof && hadsome)
                               putchar('\n');
                       if (c == -1)
                               break;
                       putchar(c);
                       hadsome = 1;
               }
       } while (argc > 0);
}