thodg/libgit2/src/buffer.h

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• Hash : df743c7d
  Author :
  Date : 2012-01-09T15:37:19
  

  Initial implementation of gitignore support Adds support for .gitignore files to git_status_foreach() and git_status_file(). This includes refactoring the gitattributes code to share logic where possible. The GIT_STATUS_IGNORED flag will now be passed in for files that are ignored (provided they are not already in the index or the head of repo).

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• src/buffer.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_buffer_h__
  #define INCLUDE_buffer_h__
  
  #include "common.h"
  
  typedef struct {
  	char *ptr;
  	ssize_t asize, size;
  } git_buf;
  
  extern char git_buf_initbuf[];
  
  #define GIT_BUF_INIT { git_buf_initbuf, 0, 0 }
  
  /**
   * Initialize a git_buf structure.
   *
   * For the cases where GIT_BUF_INIT cannot be used to do static
   * initialization.
   */
  void git_buf_init(git_buf *buf, size_t initial_size);
  
  /**
   * Grow the buffer to hold at least `target_size` bytes.
   *
   * If the allocation fails, this will return an error and the buffer
   * will be marked as invalid for future operations.  The existing
   * contents of the buffer will be preserved however.
   * @return GIT_SUCCESS or GIT_ENOMEM on failure
   */
  int git_buf_grow(git_buf *buf, size_t target_size);
  
  /**
   * Attempt to grow the buffer to hold at least `target_size` bytes.
   *
   * This is just like `git_buf_grow` except that even if the allocation
   * fails, the git_buf will still be left in a valid state.
   */
  int git_buf_try_grow(git_buf *buf, size_t target_size);
  
  void git_buf_free(git_buf *buf);
  void git_buf_swap(git_buf *buf_a, git_buf *buf_b);
  char *git_buf_detach(git_buf *buf);
  void git_buf_attach(git_buf *buf, char *ptr, ssize_t asize);
  
  /**
   * Test if there have been any reallocation failures with this git_buf.
   *
   * Any function that writes to a git_buf can fail due to memory allocation
   * issues.  If one fails, the git_buf will be marked with an OOM error and
   * further calls to modify the buffer will fail.  Check git_buf_oom() at the
   * end of your sequence and it will be true if you ran out of memory at any
   * point with that buffer.
   * @return 0 if no error, 1 if allocation error.
   */
  int git_buf_oom(const git_buf *buf);
  
  /**
   * Just like git_buf_oom, except returns appropriate error code.
   * @return GIT_ENOMEM if allocation error, GIT_SUCCESS if not.
   */
  int git_buf_lasterror(const git_buf *buf);
  
  /*
   * The functions below that return int values, will return GIT_ENOMEM
   * if they fail to expand the git_buf when they are called, otherwise
   * GIT_SUCCESS.  Passing a git_buf that has failed an allocation will
   * automatically return GIT_ENOMEM for all further calls.  As a result,
   * you can ignore the return code of these functions and call them in a
   * series then just call git_buf_lasterror at the end.
   */
  int git_buf_set(git_buf *buf, const char *data, size_t len);
  int git_buf_sets(git_buf *buf, const char *string);
  int git_buf_putc(git_buf *buf, char c);
  int git_buf_put(git_buf *buf, const char *data, size_t len);
  int git_buf_puts(git_buf *buf, const char *string);
  int git_buf_printf(git_buf *buf, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
  void git_buf_clear(git_buf *buf);
  void git_buf_consume(git_buf *buf, const char *end);
  void git_buf_truncate(git_buf *buf, ssize_t len);
  
  int git_buf_join_n(git_buf *buf, char separator, int nbuf, ...);
  int git_buf_join(git_buf *buf, char separator, const char *str_a, const char *str_b);
  
  /**
   * Join two strings as paths, inserting a slash between as needed.
   * @return error code or GIT_SUCCESS
   */
  GIT_INLINE(int) git_buf_joinpath(git_buf *buf, const char *a, const char *b)
  {
  	return git_buf_join(buf, '/', a, b);
  }
  
  GIT_INLINE(const char *) git_buf_cstr(git_buf *buf)
  {
  	return buf->ptr;
  }
  
  void git_buf_copy_cstr(char *data, size_t datasize, const git_buf *buf);
  
  #define git_buf_PUTS(buf, str) git_buf_put(buf, str, sizeof(str) - 1)
  
  GIT_INLINE(int) git_buf_rfind_next(git_buf *buf, char ch)
  {
  	int idx = buf->size - 1;
  	while (idx >= 0 && buf->ptr[idx] == ch) idx--;
  	while (idx >= 0 && buf->ptr[idx] != ch) idx--;
  	return idx;
  }
  
  #endif
  

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