readsubdir.c

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#include "readsubdir.h"
#include "fmt.h"
#include "scan.h"
#include "str.h"
#include "auto_split.h"
 
void readsubdir_init(readsubdir *rs, char *name, void (*pause)())
{
  rs->name = name;
  rs->pause = pause;
  rs->dir = 0;
  rs->pos = 0;
}
 
static char namepos[FMT_ULONG + 4 + READSUBDIR_NAMELEN];
 
int readsubdir_next(readsubdir *rs, unsigned long *id)
{
  direntry *d;
  unsigned int len;
 
  if (!rs->dir) {
    if (rs->pos >= auto_split) return 0;
    if (str_len(rs->name) > READSUBDIR_NAMELEN) { rs->pos++; return -1; }
    len = 0;
    len += fmt_str(namepos + len,rs->name);
    namepos[len++] = '/';
    len += fmt_ulong(namepos + len,(unsigned long) rs->pos);
    namepos[len] = 0;
    while (!(rs->dir = opendir(namepos))) rs->pause(namepos);
    rs->pos++;
    return -1;
  }
 
  d = readdir(rs->dir);
  if (!d) { closedir(rs->dir); rs->dir = 0; return -1; }
 
  if (str_equal(d->d_name,".")) return -1;
  if (str_equal(d->d_name,"..")) return -1;
  len = scan_ulong(d->d_name,id);
  if (!len || d->d_name[len]) return -2;
 
  return 1;
}