thodg/libgit2/src/blob.c

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• Hash : f79026b4
  Author :
  Date : 2011-07-04T11:43:34
  

  fileops: Cleanup Cleaned up the structure of the whole OS-abstraction layer. fileops.c now contains a set of utility methods for file management used by the library. These are abstractions on top of the original POSIX calls. There's a new file called `posix.c` that contains emulations/reimplementations of all the POSIX calls the library uses. These are prefixed with `p_`. There's a specific posix file for each platform (win32 and unix). All the path-related methods have been moved from `utils.c` to `path.c` and have their own prefix.

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• src/blob.c

• /*
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2,
   * as published by the Free Software Foundation.
   *
   * In addition to the permissions in the GNU General Public License,
   * the authors give you unlimited permission to link the compiled
   * version of this file into combinations with other programs,
   * and to distribute those combinations without any restriction
   * coming from the use of this file.  (The General Public License
   * restrictions do apply in other respects; for example, they cover
   * modification of the file, and distribution when not linked into
   * a combined executable.)
   *
   * This file is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; see the file COPYING.  If not, write to
   * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #include "git2/common.h"
  #include "git2/object.h"
  #include "git2/repository.h"
  
  #include "common.h"
  #include "blob.h"
  
  const void *git_blob_rawcontent(git_blob *blob)
  {
  	assert(blob);
  	return blob->odb_object->raw.data;
  }
  
  int git_blob_rawsize(git_blob *blob)
  {
  	assert(blob);
  	return blob->odb_object->raw.len;
  }
  
  void git_blob__free(git_blob *blob)
  {
  	git_odb_object_close(blob->odb_object);
  	free(blob);
  }
  
  int git_blob__parse(git_blob *blob, git_odb_object *odb_obj)
  {
  	assert(blob);
  	git_cached_obj_incref((git_cached_obj *)odb_obj);
  	blob->odb_object = odb_obj;
  	return GIT_SUCCESS;
  }
  
  int git_blob_create_frombuffer(git_oid *oid, git_repository *repo, const void *buffer, size_t len)
  {
  	int error;
  	git_odb_stream *stream;
  
  	if ((error = git_odb_open_wstream(&stream, repo->db, len, GIT_OBJ_BLOB)) < GIT_SUCCESS)
  		return git__rethrow(error, "Failed to create blob");
  
  	if ((error = stream->write(stream, buffer, len)) < GIT_SUCCESS) {
  		stream->free(stream);
  		return error;
  	}
  
  	error = stream->finalize_write(oid, stream);
  	stream->free(stream);
  
  	if (error < GIT_SUCCESS)
  		return git__rethrow(error, "Failed to create blob");
  
  	return GIT_SUCCESS;
  }
  
  int git_blob_create_fromfile(git_oid *oid, git_repository *repo, const char *path)
  {
  	int error, islnk;
  	int fd = 0;
  	char full_path[GIT_PATH_MAX];
  	char buffer[2048];
  	git_off_t size;
  	git_odb_stream *stream;
  	struct stat st;
  
  	if (repo->path_workdir == NULL)
  		return git__throw(GIT_ENOTFOUND, "Failed to create blob. (No working directory found)");
  
  	git_path_join(full_path, repo->path_workdir, path);
  
  	error = p_lstat(full_path, &st);
  	if (error < 0) {
  		return git__throw(GIT_EOSERR, "Failed to stat blob. %s", strerror(errno));
  	}
  
  	islnk = S_ISLNK(st.st_mode);
  	size = st.st_size;
  
  	if (!islnk)
  		if ((fd = p_open(full_path, O_RDONLY)) < 0)
  			return git__throw(GIT_ENOTFOUND, "Failed to create blob. Could not open '%s'", full_path);
  
  	if ((error = git_odb_open_wstream(&stream, repo->db, (size_t)size, GIT_OBJ_BLOB)) < GIT_SUCCESS) {
  		if (!islnk)
  			p_close(fd);
  		return git__rethrow(error, "Failed to create blob");
  	}
  
  	while (size > 0) {
  		ssize_t read_len;
  
  		if (!islnk)
  			read_len = p_read(fd, buffer, sizeof(buffer));
  		else
  			read_len = p_readlink(full_path, buffer, sizeof(buffer));
  
  		if (read_len < 0) {
  			if (!islnk)
  				p_close(fd);
  			stream->free(stream);
  			return git__throw(GIT_EOSERR, "Failed to create blob. Can't read full file");
  		}
  
  		stream->write(stream, buffer, read_len);
  		size -= read_len;
  	}
  
  	error = stream->finalize_write(oid, stream);
  	stream->free(stream);
  	if (!islnk)
  		p_close(fd);
  
  	return error == GIT_SUCCESS ? GIT_SUCCESS : git__rethrow(error, "Failed to create blob");
  }
  
  

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