thodg/libgit2/src/path.h

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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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• src/path.h

• /*
   * Copyright (C) 2009-2011 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_path_h__
  #define INCLUDE_path_h__
  
  #include "common.h"
  #include "buffer.h"
  
  /*
   * The dirname() function shall take a pointer to a character string
   * that contains a pathname, and return a pointer to a string that is a
   * pathname of the parent directory of that file. Trailing '/' characters
   * in the path are not counted as part of the path.
   *
   * If path does not contain a '/', then dirname() shall return a pointer to
   * the string ".". If path is a null pointer or points to an empty string,
   * dirname() shall return a pointer to the string "." .
   *
   * The `git_path_dirname` implementation is thread safe. The returned
   * string must be manually free'd.
   *
   * The `git_path_dirname_r` implementation writes the dirname to a `git_buf`
   * if the buffer pointer is not NULL.
   * It returns an error code < 0 if there is an allocation error, otherwise
   * the length of the dirname (which will be > 0).
   */
  extern char *git_path_dirname(const char *path);
  extern int git_path_dirname_r(git_buf *buffer, const char *path);
  
  /*
   * This function returns the basename of the file, which is the last
   * part of its full name given by fname, with the drive letter and
   * leading directories stripped off. For example, the basename of
   * c:/foo/bar/file.ext is file.ext, and the basename of a:foo is foo.
   *
   * Trailing slashes and backslashes are significant: the basename of
   * c:/foo/bar/ is an empty string after the rightmost slash.
   *
   * The `git_path_basename` implementation is thread safe. The returned
   * string must be manually free'd.
   *
   * The `git_path_basename_r` implementation writes the basename to a `git_buf`.
   * It returns an error code < 0 if there is an allocation error, otherwise
   * the length of the basename (which will be >= 0).
   */
  extern char *git_path_basename(const char *path);
  extern int git_path_basename_r(git_buf *buffer, const char *path);
  
  extern const char *git_path_topdir(const char *path);
  
  extern int git_path_root(const char *path);
  
  extern int git_path_prettify(git_buf *path_out, const char *path, const char *base);
  extern int git_path_prettify_dir(git_buf *path_out, const char *path, const char *base);
  
  extern int git_path_to_dir(git_buf *path);
  extern void git_path_string_to_dir(char* path, size_t size);
  
  #ifdef GIT_WIN32
  GIT_INLINE(void) git_path_mkposix(char *path)
  {
  	while (*path) {
  		if (*path == '\\')
  			*path = '/';
  
  		path++;
  	}
  }
  #else
  #	define git_path_mkposix(p) /* blank */
  #endif
  
  #endif
  

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