thodg/libgit2/src/posix.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/posix.c

• #include "common.h"
  #include "posix.h"
  #include "path.h"
  #include <stdio.h>
  #include <ctype.h>
  
  int p_open(const char *path, int flags)
  {
  	return open(path, flags | O_BINARY);
  }
  
  int p_creat(const char *path, int mode)
  {
  	return open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, mode);
  }
  
  int p_read(git_file fd, void *buf, size_t cnt)
  {
  	char *b = buf;
  	while (cnt) {
  		ssize_t r = read(fd, b, cnt);
  		if (r < 0) {
  			if (errno == EINTR || errno == EAGAIN)
  				continue;
  			return GIT_EOSERR;
  		}
  		if (!r)
  			break;
  		cnt -= r;
  		b += r;
  	}
  	return (int)(b - (char *)buf);
  }
  
  int p_write(git_file fd, void *buf, size_t cnt)
  {
  	char *b = buf;
  	while (cnt) {
  		ssize_t r = write(fd, b, cnt);
  		if (r < 0) {
  			if (errno == EINTR || errno == EAGAIN)
  				continue;
  			return GIT_EOSERR;
  		}
  		if (!r) {
  			errno = EPIPE;
  			return GIT_EOSERR;
  		}
  		cnt -= r;
  		b += r;
  	}
  	return GIT_SUCCESS;
  }
  
  int p_getcwd(char *buffer_out, size_t size)
  {
  	char *cwd_buffer;
  
  	assert(buffer_out && size > 0);
  
  #ifdef GIT_WIN32
  	cwd_buffer = _getcwd(buffer_out, size);
  #else
  	cwd_buffer = getcwd(buffer_out, size);
  #endif
  
  	if (cwd_buffer == NULL)
  		return git__throw(GIT_EOSERR, "Failed to retrieve current working directory");
  
  	git_path_mkposix(buffer_out);
  
  	git_path_join(buffer_out, buffer_out, "");	//Ensure the path ends with a trailing slash
  	return GIT_SUCCESS;
  }
  

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