thodg/libgit2/src/errors.h

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• Hash : c8e63812
  Author :
  Date : 2019-06-16T11:03:08
  

  errors: introduce `git_error_vset` function Right now, we only provide a `git_error_set` that has a variadic function signature. It's impossible to drive this function in a C89-compliant way from other functions that have a variadic signature, though, like for example `git_parse_error`. Implement a new `git_error_vset` function that gets a `va_list` as parameter, fixing the above problem.

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• src/errors.h

• /*
   * 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.
   */
  
  #ifndef INCLUDE_errors_h__
  #define INCLUDE_errors_h__
  
  #include "posix_regex.h"
  #include "common.h"
  
  /*
   * Set the error message for this thread, formatting as needed.
   */
  void git_error_set(int error_class, const char *fmt, ...) GIT_FORMAT_PRINTF(2, 3);
  void git_error_vset(int error_class, const char *fmt, va_list ap);
  
  /**
   * Set the error message for a regex failure, using the internal regex
   * error code lookup and return a libgit error code.
   */
  int git_error_set_regex(const p_regex_t *regex, int error_code);
  
  /**
   * Set error message for user callback if needed.
   *
   * If the error code in non-zero and no error message is set, this
   * sets a generic error message.
   *
   * @return This always returns the `error_code` parameter.
   */
  GIT_INLINE(int) git_error_set_after_callback_function(
  	int error_code, const char *action)
  {
  	if (error_code) {
  		const git_error *e = git_error_last();
  		if (!e || !e->message)
  			git_error_set(e ? e->klass : GIT_ERROR_CALLBACK,
  				"%s callback returned %d", action, error_code);
  	}
  	return error_code;
  }
  
  #ifdef GIT_WIN32
  #define git_error_set_after_callback(code) \
  	git_error_set_after_callback_function((code), __FUNCTION__)
  #else
  #define git_error_set_after_callback(code) \
  	git_error_set_after_callback_function((code), __func__)
  #endif
  
  /**
   * Gets the system error code for this thread.
   */
  int git_error_system_last(void);
  
  /**
   * Sets the system error code for this thread.
   */
  void git_error_system_set(int code);
  
  /**
   * Structure to preserve libgit2 error state
   */
  typedef struct {
  	int error_code;
  	unsigned int oom : 1;
  	git_error error_msg;
  } git_error_state;
  
  /**
   * Capture current error state to restore later, returning error code.
   * If `error_code` is zero, this does not clear the current error state.
   * You must either restore this error state, or free it.
   */
  extern int git_error_state_capture(git_error_state *state, int error_code);
  
  /**
   * Restore error state to a previous value, returning saved error code.
   */
  extern int git_error_state_restore(git_error_state *state);
  
  /** Free an error state. */
  extern void git_error_state_free(git_error_state *state);
  
  #endif
  

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