# 2.11BSD#431 - /usr/src/usr.bin/rev.c

##### Functions

    main              X

##### Variables

    line              X

##### Macros

    N                 X

       1: static char *sccsid = "@(#)rev.c	4.1 (Berkeley) 10/1/80";
       2: #include <stdio.h>
       3:
       4: /* reverse lines of a file */
       5:
       6: #define N 256
       7: char line[N];
       8: FILE *input;
       9:
      10: main(argc,argv)
      11: char **argv;
      12: {
      13:     register i,c;
      14:     input = stdin;
      15:     do {
      16:         if(argc>1) {
      17:             if((input=fopen(argv[1],"r"))==NULL) {
      18:                 fprintf(stderr,"rev: cannot open %s\n",
      19:                     argv[1]);
      20:                 exit(1);
      21:             }
      22:         }
      23:         for(;;){
      24:             for(i=0;i<N;i++) {
      25:                 line[i] = c = getc(input);
      26:                 switch(c) {
      27:                 case EOF:
      28:                     goto eof;
      29:                 default:
      30:                     continue;
      31:                 case '\n':
      32:                     break;
      33:                 }
      34:                 break;
      35:             }
      36:             while(--i>=0)
      37:                 putc(line[i],stdout);
      38:             putc('\n',stdout);
      39:         }
      40: eof:
      41:         fclose(input);
      42:         argc--;
      43:         argv++;
      44:     } while(argc>1);
      45: }

#### Defined functions

main defined in line 10; never used

#### Defined variables

line defined in line 7; used 2 times

- in line 25, 37

sccsid defined in line 1; never used

#### Defined macros

N defined in line 6; used 2 times

- in line 7, 24

Last modified: 1987-02-17 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1015 |