thodg/libgit2/src/win32/dir.c

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• Hash : 7026ad89
  Author :
  Date : 2013-05-16T21:08:55
  

  calloc() to initialize memory

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• src/win32/dir.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #define GIT__WIN32_NO_WRAP_DIR
  #include "dir.h"
  #include "utf-conv.h"
  
  static int init_filter(char *filter, size_t n, const char *dir)
  {
  	size_t len = strlen(dir);
  
  	if (len+3 >= n)
  		return 0;
  
  	strcpy(filter, dir);
  	if (len && dir[len-1] != '/')
  		strcat(filter, "/");
  	strcat(filter, "*");
  
  	return 1;
  }
  
  git__DIR *git__opendir(const char *dir)
  {
  	char filter[GIT_WIN_PATH];
  	wchar_t filter_w[GIT_WIN_PATH];
  	git__DIR *new = NULL;
  
  	if (!dir || !init_filter(filter, sizeof(filter), dir))
  		return NULL;
  
  	new = git__calloc(1, sizeof(*new));
  	if (!new)
  		return NULL;
  
  	new->dir = git__strdup(dir);
  	if (!new->dir)
  		goto fail;
  
  	git__utf8_to_16(filter_w, GIT_WIN_PATH, filter);
  	new->h = FindFirstFileW(filter_w, &new->f);
  
  	if (new->h == INVALID_HANDLE_VALUE) {
  		giterr_set(GITERR_OS, "Could not open directory '%s'", dir);
  		goto fail;
  	}
  
  	new->first = 1;
  	return new;
  
  fail:
  	git__free(new->dir);
  	git__free(new);
  	return NULL;
  }
  
  int git__readdir_ext(
  	git__DIR *d,
  	struct git__dirent *entry,
  	struct git__dirent **result,
  	int *is_dir)
  {
  	if (!d || !entry || !result || d->h == INVALID_HANDLE_VALUE)
  		return -1;
  
  	*result = NULL;
  
  	if (d->first)
  		d->first = 0;
  	else if (!FindNextFileW(d->h, &d->f)) {
  		if (GetLastError() == ERROR_NO_MORE_FILES)
  			return 0;
  		giterr_set(GITERR_OS, "Could not read from directory '%s'", d->dir);
  		return -1;
  	}
  
  	if (wcslen(d->f.cFileName) >= sizeof(entry->d_name))
  		return -1;
  
  	git__utf16_to_8(entry->d_name, d->f.cFileName);
  	entry->d_ino = 0;
  
  	*result = entry;
  
  	if (is_dir != NULL)
  		*is_dir = ((d->f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0);
  
  	return 0;
  }
  
  struct git__dirent *git__readdir(git__DIR *d)
  {
  	struct git__dirent *result;
  	if (git__readdir_ext(d, &d->entry, &result, NULL) < 0)
  		return NULL;
  	return result;
  }
  
  void git__rewinddir(git__DIR *d)
  {
  	char filter[GIT_WIN_PATH];
  	wchar_t filter_w[GIT_WIN_PATH];
  
  	if (!d)
  		return;
  
  	if (d->h != INVALID_HANDLE_VALUE) {
  		FindClose(d->h);
  		d->h = INVALID_HANDLE_VALUE;
  		d->first = 0;
  	}
  
  	if (!init_filter(filter, sizeof(filter), d->dir))
  		return;
  
  	git__utf8_to_16(filter_w, GIT_WIN_PATH, filter);
  	d->h = FindFirstFileW(filter_w, &d->f);
  
  	if (d->h == INVALID_HANDLE_VALUE)
  		giterr_set(GITERR_OS, "Could not open directory '%s'", d->dir);
  	else
  		d->first = 1;
  }
  
  int git__closedir(git__DIR *d)
  {
  	if (!d)
  		return 0;
  
  	if (d->h != INVALID_HANDLE_VALUE) {
  		FindClose(d->h);
  		d->h = INVALID_HANDLE_VALUE;
  	}
  	git__free(d->dir);
  	d->dir = NULL;
  	git__free(d);
  	return 0;
  }
  
  

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