main.c

/*  $Id: main.c,v 1.1 1999/03/23 14:15:26 vickery Exp $
 *
 *    Driver program for the new strtok().
 *
 *    C. Vickery
 *    CS-381.2
 *    Spring 99
 *
 *    $Log: main.c,v $
 * Revision 1.1  1999/03/23  14:15:26  vickery
 * Initial revision
 *
 */

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

#include "strtok.h"

char *
strchr( const char *, int c );
size_t
strspn( const char *, const char * );

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

int   cmdNo;
char  *token;
char  inBuf[1024];
char  *continuation;
char  termChar[3];


  for (;;) {

    printf( "Enter command: " );
    gets( inBuf );

    continuation = inBuf;
    continuation += strspn( continuation, " \t" );
    if ( ! *continuation ) continue;
    if ( strchr( "&;|", *continuation ) ){
      fprintf( stderr, "Syntax error: \'%c\' unexpected at beginning "
                       "of line.\n", *continuation );
      continue;
      }

    cmdNo = 1;
    while ( (token = strtok(  continuation,
                              ";|&",
                              &continuation,
                              termChar ) ) != NULL) {
    termChar[1] = '\0';
    if ( ((*termChar == '&') && (*continuation == '&')) ||
         ((*termChar == '|') && (*continuation == '|')) ||
         ((*termChar == ';') && (*continuation == ';')) ) {
      termChar[1] = *continuation++;
      termChar[2] = '\0';
      }
    if ( *continuation && strchr( "&|;", *continuation) ) {
      fprintf( stderr, "Syntax error: \'%c\' unexpected after "
                "\"%s %s\"\n", *continuation, token, termChar );
      break;
      }
    else {
      printf( "  Command %d was: \"%s\"\n", cmdNo++, token );
      printf( "  It was terminated by \'%s\'\n", termChar );
      }

    }
  }
}