printTree.c

#include "tree.h"

void make_shift(int n){
    while(n--)
        putc(' ', stderr);
}

void print_argv(char **p, int shift){
    char **q=p;
    if(p!=NULL){
        while(*p!=NULL){
             make_shift(shift);
             fprintf(stderr, "argv[%d]=%s\n",(int) (p-q), *p);
             p++;
        }
    }
}

void print_tree(tree t, int shift){
    char **p;
    if(t==NULL)
        return;
    p=t->argv;
    if(p!=NULL)
        print_argv(p, shift);
    else{
        make_shift(shift);
        fprintf(stderr, "psubshell\n");
    }
    make_shift(shift);
    if(t->infile==NULL)
        fprintf(stderr, "infile=NULL\n");
    else
        fprintf(stderr, "infile=%s\n", t->infile);
    make_shift(shift);
    if(t->outfile==NULL)
        fprintf(stderr, "outfile=NULL\n");
    else
        fprintf(stderr, "outfile=%s\n", t->outfile);
    make_shift(shift);
    fprintf(stderr, "append=%d\n", t->append);
    make_shift(shift);
    fprintf(stderr, "background=%d\n", t->backgrnd);
    make_shift(shift);
    fprintf(stderr, "type=%s\n", t->type==NXT?"NXT": t->type==OR?"OR": "AND" );
    make_shift(shift);
    if(t->psubcmd==NULL)
        fprintf(stderr, "psubcmd=NULL \n");
    else{
        fprintf(stderr, "psubcmd---> \n");
        print_tree(t->psubcmd, shift+5);
    }
    make_shift(shift);
    if(t->pipe==NULL)
        fprintf(stderr, "pipe=NULL \n");
    else{
        fprintf(stderr, "pipe---> \n");
        print_tree(t->pipe, shift+5);
    }
    make_shift(shift);
    if(t->next==NULL)
        fprintf(stderr, "next=NULL \n");
    else{
        fprintf(stderr, "next---> \n");
        print_tree(t->next, shift+5);
    }
}