wut/libraries/wutdevoptab/devoptab_fsa_diropen.cpp

#include <mutex>
#include "devoptab_fsa.h"

DIR_ITER *
__wut_fsa_diropen(struct _reent *r,
                  DIR_ITER *dirState,
                  const char *path)
{
   FSADirectoryHandle fd;
   FSError status;
   __wut_fsa_dir_t *dir;
   __wut_fsa_device_t *deviceData;

   if (!dirState || !path) {
      r->_errno = EINVAL;
      return NULL;
   }

   char *fixedPath = __wut_fsa_fixpath(r, path);
   if (!fixedPath) {
      return NULL;
   }
   dir        = (__wut_fsa_dir_t *)(dirState->dirStruct);
   deviceData = (__wut_fsa_device_t *)r->deviceData;

   // Remove trailing '/'
   if (fixedPath[0] != '\0') {
      if (fixedPath[strlen(fixedPath) - 1] == '/') {
         fixedPath[strlen(fixedPath) - 1] = 0;
      }
   }

   if (snprintf(dir->fullPath, sizeof(dir->fullPath), "%s", fixedPath) >= (int)sizeof(dir->fullPath)) {
      WUT_DEBUG_REPORT("__wut_fsa_diropen: snprintf result was truncated\n");
   }

   free(fixedPath);

   dir->mutex.init(dir->fullPath);
   std::scoped_lock lock(dir->mutex);

   status = FSAOpenDir(deviceData->clientHandle, dir->fullPath, &fd);
   if (status < 0) {
      WUT_DEBUG_REPORT("FSAOpenDir(0x%08X, %s, %p) failed: %s\n",
                       deviceData->clientHandle, dir->fullPath, &fd, FSAGetStatusStr(status));
      r->_errno = __wut_fsa_translate_error(status);
      return NULL;
   }

   dir->magic = FSA_DIRITER_MAGIC;
   dir->fd    = fd;
   memset(&dir->entry_data, 0, sizeof(dir->entry_data));
   return dirState;
}