thodg/libgit2/src/refspec.c

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• Hash : 97769280
  Author :
  Date : 2011-11-30T11:27:15
  

  Use git_buf for path storage instead of stack-based buffers This converts virtually all of the places that allocate GIT_PATH_MAX buffers on the stack for manipulating paths to use git_buf objects instead. The patch is pretty careful not to touch the public API for libgit2, so there are a few places that still use GIT_PATH_MAX. This extends and changes some details of the git_buf implementation to add a couple of extra functions and to make error handling easier. This includes serious alterations to all the path.c functions, and several of the fileops.c ones, too. Also, there are a number of new functions that parallel existing ones except that use a git_buf instead of a stack-based buffer (such as git_config_find_global_r that exists alongsize git_config_find_global). This also modifies the win32 version of p_realpath to allocate whatever buffer size is needed to accommodate the realpath instead of hardcoding a GIT_PATH_MAX limit, but that change needs to be tested still.

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• src/refspec.c

• /*
   * 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.
   */
  
  #include "git2/errors.h"
  
  #include "common.h"
  #include "refspec.h"
  #include "util.h"
  
  int git_refspec_parse(git_refspec *refspec, const char *str)
  {
  	char *delim;
  
  	memset(refspec, 0x0, sizeof(git_refspec));
  
  	if (*str == '+') {
  		refspec->force = 1;
  		str++;
  	}
  
  	delim = strchr(str, ':');
  	if (delim == NULL) {
  		refspec->src = git__strdup(str);
  		if (refspec->src == NULL)
  			return GIT_ENOMEM;
  
  		return GIT_SUCCESS;
  	}
  
  	refspec->src = git__strndup(str, delim - str);
  	if (refspec->src == NULL)
  		return GIT_ENOMEM;
  
  	refspec->dst = git__strdup(delim + 1);
  	if (refspec->dst == NULL) {
  		git__free(refspec->src);
  		refspec->src = NULL;
  		return GIT_ENOMEM;
  	}
  
  	return GIT_SUCCESS;
  }
  
  const char *git_refspec_src(const git_refspec *refspec)
  {
  	return refspec == NULL ? NULL : refspec->src;
  }
  
  const char *git_refspec_dst(const git_refspec *refspec)
  {
  	return refspec == NULL ? NULL : refspec->dst;
  }
  
  int git_refspec_src_match(const git_refspec *refspec, const char *refname)
  {
  	return refspec == NULL ? GIT_ENOMATCH : git__fnmatch(refspec->src, refname, 0);
  }
  
  int git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, const char *name)
  {
  	size_t baselen, namelen;
  
  	baselen = strlen(spec->dst);
  	if (outlen <= baselen)
  		return git__throw(GIT_EINVALIDREFNAME, "Reference name too long");
  
  	/*
  	 * No '*' at the end means that it's mapped to one specific local
  	 * branch, so no actual transformation is needed.
  	 */
  	if (spec->dst[baselen - 1] != '*') {
  		memcpy(out, spec->dst, baselen + 1); /* include '\0' */
  		return GIT_SUCCESS;
  	}
  
  	/* There's a '*' at the end, so remove its length */
  	baselen--;
  
  	/* skip the prefix, -1 is for the '*' */
  	name += strlen(spec->src) - 1;
  
  	namelen = strlen(name);
  
  	if (outlen <= baselen + namelen)
  		return git__throw(GIT_EINVALIDREFNAME, "Reference name too long");
  
  	memcpy(out, spec->dst, baselen);
  	memcpy(out + baselen, name, namelen + 1);
  
  	return GIT_SUCCESS;
  }
  
  int git_refspec_transform_r(git_buf *out, const git_refspec *spec, const char *name)
  {
  	if (git_buf_sets(out, spec->dst) < GIT_SUCCESS)
  		return git_buf_lasterror(out);
  
  	/*
  	 * No '*' at the end means that it's mapped to one specific local
  	 * branch, so no actual transformation is needed.
  	 */
  	if (out->size > 0 && out->ptr[out->size - 1] != '*')
  		return GIT_SUCCESS;
  
  	git_buf_truncate(out, out->size - 1); /* remove trailing '*' */
  	git_buf_puts(out, name);
  
  	return git_buf_lasterror(out);
  }
  

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