thodg/libgit2/tests-clay/core/dirent.c

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• Hash : 97769280
  Author :
  Date : 2011-11-30T11:27:15
  

  Use git_buf for path storage instead of stack-based buffers
  
  This converts virtually all of the places that allocate GIT_PATH_MAX
  buffers on the stack for manipulating paths to use git_buf objects
  instead.  The patch is pretty careful not to touch the public API
  for libgit2, so there are a few places that still use GIT_PATH_MAX.
  
  This extends and changes some details of the git_buf implementation
  to add a couple of extra functions and to make error handling easier.
  
  This includes serious alterations to all the path.c functions, and
  several of the fileops.c ones, too.  Also, there are a number of new
  functions that parallel existing ones except that use a git_buf
  instead of a stack-based buffer (such as git_config_find_global_r
  that exists alongsize git_config_find_global).
  
  This also modifies the win32 version of p_realpath to allocate whatever
  buffer size is needed to accommodate the realpath instead of hardcoding
  a GIT_PATH_MAX limit, but that change needs to be tested still.
  

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• tests-clay/core/dirent.c

• #include "clay_libgit2.h"
  #include "fileops.h"
  
  typedef struct name_data {
  	int count; /* return count */
  	char *name; /* filename		*/
  } name_data;
  
  typedef struct walk_data {
  	char *sub;		/* sub-directory name */
  	name_data *names; /* name state data	*/
  	git_buf path;
  } walk_data;
  
  
  static char *top_dir = "dir-walk";
  static walk_data *state_loc;
  
  static void setup(walk_data *d)
  {
  	name_data *n;
  
  	cl_must_pass(p_mkdir(top_dir, 0777));
  
  	cl_must_pass(p_chdir(top_dir));
  
  	if (strcmp(d->sub, ".") != 0)
  		cl_must_pass(p_mkdir(d->sub, 0777));
  
  	cl_git_pass(git_buf_sets(&d->path, d->sub));
  
  	state_loc = d;
  
  	for (n = d->names; n->name; n++) {
  		git_file fd = p_creat(n->name, 0666);
  		cl_assert(fd >= 0);
  		p_close(fd);
  		n->count = 0;
  	}
  }
  
  static void dirent_cleanup__cb(void *_d)
  {
  	walk_data *d = _d;
  	name_data *n;
  
  	for (n = d->names; n->name; n++) {
  		cl_must_pass(p_unlink(n->name));
  	}
  
  	if (strcmp(d->sub, ".") != 0)
  		cl_must_pass(p_rmdir(d->sub));
  
  	cl_must_pass(p_chdir(".."));
  
  	cl_must_pass(p_rmdir(top_dir));
  
  	git_buf_free(&d->path);
  }
  
  static void check_counts(walk_data *d)
  {
  	name_data *n;
  
  	for (n = d->names; n->name; n++) {
  		cl_assert(n->count == 1);
  	}
  }
  
  static int one_entry(void *state, git_buf *path)
  {
  	walk_data *d = (walk_data *) state;
  	name_data *n;
  
  	if (state != state_loc)
  		return GIT_ERROR;
  
  	if (path != &d->path)
  		return GIT_ERROR;
  
  	for (n = d->names; n->name; n++) {
  		if (!strcmp(n->name, path->ptr)) {
  			n->count++;
  			return 0;
  		}
  	}
  
  	return GIT_ERROR;
  }
  
  static int dont_call_me(void *GIT_UNUSED(state), git_buf *GIT_UNUSED(path))
  {
  	GIT_UNUSED_ARG(state)
  	GIT_UNUSED_ARG(path)
  	return GIT_ERROR;
  }
  
  
  
  static name_data dot_names[] = {
  	{ 0, "./a" },
  	{ 0, "./asdf" },
  	{ 0, "./pack-foo.pack" },
  	{ 0, NULL }
  };
  static walk_data dot = {
  	".",
  	dot_names,
  	GIT_BUF_INIT
  };
  
  /* make sure that the '.' folder is not traversed */
  void test_core_dirent__dont_traverse_dot(void)
  {
  	cl_set_cleanup(&dirent_cleanup__cb, &dot);
  	setup(&dot);
  
  	cl_git_pass(git_futils_direach(&dot.path,
  					one_entry,
  					&dot));
  
  	check_counts(&dot);
  }
  
  
  static name_data sub_names[] = {
  	{ 0, "sub/a" },
  	{ 0, "sub/asdf" },
  	{ 0, "sub/pack-foo.pack" },
  	{ 0, NULL }
  };
  static walk_data sub = {
  	"sub",
  	sub_names,
  	GIT_BUF_INIT
  };
  
  /* traverse a subfolder */
  void test_core_dirent__traverse_subfolder(void)
  {
  	cl_set_cleanup(&dirent_cleanup__cb, &sub);
  	setup(&sub);
  
  	cl_git_pass(git_futils_direach(&sub.path,
  					one_entry,
  					&sub));
  
  	check_counts(&sub);
  }
  
  
  static walk_data sub_slash = {
  	"sub/",
  	sub_names,
  	GIT_BUF_INIT
  };
  
  /* traverse a slash-terminated subfolder */
  void test_core_dirent__traverse_slash_terminated_folder(void)
  {
  	cl_set_cleanup(&dirent_cleanup__cb, &sub_slash);
  	setup(&sub_slash);
  
  	cl_git_pass(git_futils_direach(&sub_slash.path,
  					one_entry,
  					&sub_slash));
  
  	check_counts(&sub_slash);
  }
  
  
  static name_data empty_names[] = {
  	{ 0, NULL }
  };
  static walk_data empty = {
  	"empty",
  	empty_names,
  	GIT_BUF_INIT
  };
  
  /* make sure that empty folders are not traversed */
  void test_core_dirent__dont_traverse_empty_folders(void)
  {
  	cl_set_cleanup(&dirent_cleanup__cb, &empty);
  	setup(&empty);
  
  	cl_git_pass(git_futils_direach(&empty.path,
  					one_entry,
  					&empty));
  
  	check_counts(&empty);
  
  	/* make sure callback not called */
  	cl_git_pass(git_futils_direach(&empty.path,
  					dont_call_me,
  					&empty));
  }
  
  static name_data odd_names[] = {
  	{ 0, "odd/.a" },
  	{ 0, "odd/..c" },
  	/* the following don't work on cygwin/win32 */
  	/* { 0, "odd/.b." }, */
  	/* { 0, "odd/..d.." }, */
  	{ 0, NULL }
  };
  static walk_data odd = {
  	"odd",
  	odd_names,
  	GIT_BUF_INIT
  };
  
  /* make sure that strange looking filenames ('..c') are traversed */
  void test_core_dirent__traverse_weird_filenames(void)
  {
  	cl_set_cleanup(&dirent_cleanup__cb, &odd);
  	setup(&odd);
  
  	cl_git_pass(git_futils_direach(&odd.path,
  					one_entry,
  					&odd));
  
  	check_counts(&odd);
  }
  

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