thodg/libgit2/src/errors.c

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• Hash : 1a481123
  Author :
  Date : 2012-02-17T00:13:34
  

  error-handling: References Yes, this is error handling solely for `refs.c`, but some of the abstractions leak all ofer the code base.

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• src/errors.c

• /*
   * Copyright (C) 2009-2012 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.
   */
  #include "common.h"
  #include "global.h"
  #include "posix.h"
  #include <stdarg.h>
  
  static struct {
  	int num;
  	const char *str;
  } error_codes[] = {
  	{GIT_ERROR, "Unspecified error"},
  	{GIT_ENOTOID, "Input was not a properly formatted Git object id."},
  	{GIT_ENOTFOUND, "Object does not exist in the scope searched."},
  	{GIT_ENOMEM, "Not enough space available."},
  	{GIT_EOSERR, "Consult the OS error information."},
  	{GIT_EOBJTYPE, "The specified object is of invalid type"},
  	{GIT_EOBJCORRUPTED, "The specified object has its data corrupted"},
  	{GIT_ENOTAREPO, "The specified repository is invalid"},
  	{GIT_EINVALIDTYPE, "The object or config variable type is invalid or doesn't match"},
  	{GIT_EMISSINGOBJDATA, "The object cannot be written that because it's missing internal data"},
  	{GIT_EPACKCORRUPTED, "The packfile for the ODB is corrupted"},
  	{GIT_EFLOCKFAIL, "Failed to adquire or release a file lock"},
  	{GIT_EZLIB, "The Z library failed to inflate/deflate an object's data"},
  	{GIT_EBUSY, "The queried object is currently busy"},
  	{GIT_EINVALIDPATH, "The path is invalid"},
  	{GIT_EBAREINDEX, "The index file is not backed up by an existing repository"},
  	{GIT_EINVALIDREFNAME, "The name of the reference is not valid"},
  	{GIT_EREFCORRUPTED, "The specified reference has its data corrupted"},
  	{GIT_ETOONESTEDSYMREF, "The specified symbolic reference is too deeply nested"},
  	{GIT_EPACKEDREFSCORRUPTED, "The pack-refs file is either corrupted of its format is not currently supported"},
  	{GIT_EINVALIDPATH, "The path is invalid" },
  	{GIT_EREVWALKOVER, "The revision walker is empty; there are no more commits left to iterate"},
  	{GIT_EINVALIDREFSTATE, "The state of the reference is not valid"},
  	{GIT_ENOTIMPLEMENTED, "This feature has not been implemented yet"},
  	{GIT_EEXISTS, "A reference with this name already exists"},
  	{GIT_EOVERFLOW, "The given integer literal is too large to be parsed"},
  	{GIT_ENOTNUM, "The given literal is not a valid number"},
  	{GIT_EAMBIGUOUSOIDPREFIX, "The given oid prefix is ambiguous"},
  };
  
  const char *git_strerror(int num)
  {
  	size_t i;
  
  	if (num == GIT_EOSERR)
  		return strerror(errno);
  	for (i = 0; i < ARRAY_SIZE(error_codes); i++)
  		if (num == error_codes[i].num)
  			return error_codes[i].str;
  
  	return "Unknown error";
  }
  
  #define ERROR_MAX_LEN 1024
  
  void git___rethrow(const char *msg, ...)
  {
  	char new_error[ERROR_MAX_LEN];
  	char *last_error;
  	char *old_error = NULL;
  
  	va_list va;
  
  	last_error = GIT_GLOBAL->error.last;
  
  	va_start(va, msg);
  	vsnprintf(new_error, ERROR_MAX_LEN, msg, va);
  	va_end(va);
  
  	old_error = git__strdup(last_error);
  
  	snprintf(last_error, ERROR_MAX_LEN, "%s \n	- %s", new_error, old_error);
  
  	git__free(old_error);
  }
  
  void git___throw(const char *msg, ...)
  {
  	va_list va;
  
  	va_start(va, msg);
  	vsnprintf(GIT_GLOBAL->error.last, ERROR_MAX_LEN, msg, va);
  	va_end(va);
  }
  
  const char *git_lasterror(void)
  {
  	char *last_error = GIT_GLOBAL->error.last;
  
  	if (!last_error[0])
  		return NULL;
  
  	return last_error;
  }
  
  void git_clearerror(void)
  {
  	char *last_error = GIT_GLOBAL->error.last;
  	last_error[0] = '\0';
  }
  
  /********************************************
   * New error handling
   ********************************************/
  
  static git_error g_git_oom_error = {
  	"Out of memory",
  	GITERR_NOMEMORY
  };
  
  void giterr_set_oom(void)
  {
  	GIT_GLOBAL->last_error = &g_git_oom_error;
  }
  
  void giterr_set(int error_class, const char *string, ...)
  {
  	char error_str[1024];
  	va_list arglist;
  	git_error *error;
  
  	error = &GIT_GLOBAL->error_t;
  	free(error->message);
  
  	va_start(arglist, string);
  	p_vsnprintf(error_str, sizeof(error_str), string, arglist);
  	va_end(arglist);
  
  	error->message = git__strdup(error_str);
  	error->klass = error_class;
  
  	if (error->message == NULL) {
  		giterr_set_oom();
  		return;
  	}
  
  	GIT_GLOBAL->last_error = error;
  }
  
  void giterr_clear(void)
  {
  	GIT_GLOBAL->last_error = NULL;
  }
  

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