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#include "dirent.h"
#include "unistd.h"
#include "stdlib.h"
#include <Kernel/Syscall.h>
#include "stdio.h"
extern "C" {
DIR* opendir(const char* name)
{
// FIXME: Should fail if it's not a directory!
int fd = open(name);
if (fd == -1)
return nullptr;
DIR* dirp = (DIR*)malloc(sizeof(dirp));
dirp->fd = fd;
dirp->buffer = nullptr;
dirp->buffer_size = 0;
dirp->nextptr = nullptr;
return dirp;
}
struct sys_dirent {
ino_t ino;
byte file_type;
size_t namelen;
char name[];
size_t total_size()
{
return sizeof(ino_t) + sizeof(byte) + sizeof(size_t) + sizeof(char) * namelen;
}
} __attribute__ ((packed));
dirent* readdir(DIR* dirp)
{
if (!dirp)
return nullptr;
if (dirp->fd == -1)
return nullptr;
if (!dirp->buffer) {
// FIXME: Figure out how much to actually allocate.
dirp->buffer = (char*)malloc(4096);
ssize_t nread = Syscall::invoke(Syscall::GetDirEntries, (dword)dirp->fd, (dword)dirp->buffer, 4096);
dirp->buffer_size = nread;
dirp->nextptr = dirp->buffer;
}
if (dirp->nextptr >= (dirp->buffer + dirp->buffer_size))
return nullptr;
auto* sys_ent = (sys_dirent*)dirp->nextptr;
dirp->cur_ent.d_ino = sys_ent->ino;
dirp->cur_ent.d_type = sys_ent->file_type;
dirp->cur_ent.d_off = 0;
dirp->cur_ent.d_reclen = sys_ent->total_size();
for (size_t i = 0; i < sys_ent->namelen; ++i)
dirp->cur_ent.d_name[i] = sys_ent->name[i];
// FIXME: I think this null termination behavior is not supposed to be here.
dirp->cur_ent.d_name[sys_ent->namelen] = '\0';
dirp->nextptr += sys_ent->total_size();
return &dirp->cur_ent;
}
}
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