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Revision d64ea0f83bd7e676778f833c57f969a94518a28d authored by Jeff King on 13 January 2015, 01:57:37 UTC, committed by Junio C Hamano on 13 January 2015, 18:03:30 UTC 
git-compat-util: add xstrdup_or_null helper
 
It's a common idiom to duplicate a string if it is non-NULL,
or pass a literal NULL through. This is already a one-liner
in C, but you do have to repeat the name of the string
twice. So if there's a function call, you must write:

  const char *x = some_fun(...);
  return x ? xstrdup(x) : NULL;

instead of (with this patch) just:

  return xstrdup_or_null(some_fun(...));

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 1da1e07
Raw File
tree.h 
#ifndef TREE_H
#define TREE_H

#include "object.h"

extern const char *tree_type;

struct tree {
	struct object object;
	void *buffer;
	unsigned long size;
};

struct tree *lookup_tree(const unsigned char *sha1);

int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size);

int parse_tree(struct tree *tree);
void free_tree_buffer(struct tree *tree);

/* Parses and returns the tree in the given ent, chasing tags and commits. */
struct tree *parse_tree_indirect(const unsigned char *sha1);

#define READ_TREE_RECURSIVE 1
typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int, void *);

extern int read_tree_recursive(struct tree *tree,
			       const char *base, int baselen,
			       int stage, const struct pathspec *pathspec,
			       read_tree_fn_t fn, void *context);

extern int read_tree(struct tree *tree, int stage, struct pathspec *pathspec);

#endif /* TREE_H */
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