lib/objdir.c


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#include "object.h"
#include <stddef.h>

static objdir_entry_t*
s_objdir_seek_rec(objdir_t *lastdir, objdir_t *dir, uint8_t *path, size_t pathw)
{
    uint8_t tli = *path;
    if(tli == 0 || pathw == 0) {
        if(lastdir == NULL) return &dir->self;
        return &lastdir->entries[path[-1]];
    }
 
    objdir_entry_t *entry = &dir->entries[tli];
    if(entry->type == KO_OBJECT_DIRECTORY)
        return s_objdir_seek_rec(dir, (objdir_t*)entry->data, ++path, pathw - 1);
    return entry;
}

objdir_entry_t*
objdir_seek(objdir_t *dir, uint8_t *path, size_t pathw)
{
    return s_objdir_seek_rec(NULL, dir, path, pathw);
}

unsigned long 
objdir_pathw(objdir_t *dir, uint8_t *path)
{
    size_t w = 0;
    for(; path[w]; w++) {
        uint8_t ei = path[w];
        if(dir->entries[ei].type != KO_OBJECT_DIRECTORY) return w + 1;
        dir = (objdir_t*)(dir->entries[ei].data);
    }
    return w + 1;
}