Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <bio.h>
#include "diff.h"

static int
itemcmp(void *v1, void *v2)
{
        char **d1 = v1, **d2 = v2;

        return strcmp(*d1, *d2);
}

static char **
scandir(char *name)
{
        char **cp;
        Dir *db;
        int nitems;
        int fd, n;

        if ((fd = open(name, OREAD)) < 0) {
                fprint(2, "%s: can't open %s: %r\n", argv0, name);
                /* fake an empty directory */
                cp = MALLOC(char*, 1);
                cp[0] = 0;
                return cp;
        }
        cp = 0;
        nitems = 0;
        if((n = dirreadall(fd, &db)) > 0){
                while (n--) {
                        cp = REALLOC(cp, char *, (nitems+1));
                        cp[nitems] = MALLOC(char, strlen((db+n)->name)+1);
                        strcpy(cp[nitems], (db+n)->name);
                        nitems++;
                }
                free(db);
        }
        cp = REALLOC(cp, char*, (nitems+1));
        cp[nitems] = 0;
        close(fd);
        qsort((char *)cp, nitems, sizeof(char*), itemcmp);
        return cp;
}

static int
isdotordotdot(char *p)
{
        if (*p == '.') {
                if (!p[1])
                        return 1;
                if (p[1] == '.' && !p[2])
                        return 1;
        }
        return 0;
}

void
diffdir(char *f, char *t, int level)
{
        char  **df, **dt, **dirf, **dirt;
        char *from, *to;
        int res;
        char fb[MAXPATHLEN+1], tb[MAXPATHLEN+1];

        df = scandir(f);
        dt = scandir(t);
        dirf = df;
        dirt = dt;
        while (*df || *dt) {
                from = *df;
                to = *dt;
                if (from && isdotordotdot(from)) {
                        df++;
                        continue;
                }
                if (to && isdotordotdot(to)) {
                        dt++;
                        continue;
                }
                if (!from)
                        res = 1;
                else if (!to)
                        res = -1;
                else
                        res = strcmp(from, to);
                if (res < 0) {
                        if (mode == 0 || mode == 'n')
                                Bprint(&stdout, "Only in %s: %s\n", f, from);
                        df++;
                        continue;
                }
                if (res > 0) {
                        if (mode == 0 || mode == 'n')
                                Bprint(&stdout, "Only in %s: %s\n", t, to);
                        dt++;
                        continue;
                }
                if (mkpathname(fb, f, from))
                        continue;
                if (mkpathname(tb, t, to))
                        continue;
                diff(fb, tb, level+1);
                df++; dt++;
        }
        for (df = dirf; *df; df++)
                FREE(*df);
        for (dt = dirt; *dt; dt++)
                FREE(*dt);
        FREE(dirf);
        FREE(dirt);
}