packbuilder: `size_t` all the things

After 1cd65991, we were passing a pointer to an `unsigned long` to
a function that now expected a pointer to a `size_t`.  These types
differ on 64-bit Windows, which means that we trash the stack.

Use `size_t`s in the packbuilder to avoid this.

CHANGELOG.md

@@ -51,6 +51,13 @@ v0.24 + 1
 
 ### Breaking API changes
 
+* `git_packbuilder_object_count` and `git_packbuilder_written` now
+  return a `size_t` instead of a `uint32_t` for more thorough
+  compatibility with the rest of the library.
+
+* `git_packbuiler_progress` now provides explicitly sized `uint32_t`
+  values instead of `unsigned int`.
+
 v0.24
 -------
 

include/git2/pack.h

@@ -196,7 +196,7 @@ GIT_EXTERN(int) git_packbuilder_foreach(git_packbuilder *pb, git_packbuilder_for
  * @param pb the packbuilder
  * @return the number of objects in the packfile
  */
-GIT_EXTERN(uint32_t) git_packbuilder_object_count(git_packbuilder *pb);
+GIT_EXTERN(size_t) git_packbuilder_object_count(git_packbuilder *pb);
 
 /**
  * Get the number of objects the packbuilder has already written out
@@ -204,13 +204,13 @@ GIT_EXTERN(uint32_t) git_packbuilder_object_count(git_packbuilder *pb);
  * @param pb the packbuilder
  * @return the number of objects which have already been written
  */
-GIT_EXTERN(uint32_t) git_packbuilder_written(git_packbuilder *pb);
+GIT_EXTERN(size_t) git_packbuilder_written(git_packbuilder *pb);
 
 /** Packbuilder progress notification function */
 typedef int (*git_packbuilder_progress)(
 	int stage,
-	unsigned int current,
-	unsigned int total,
+	uint32_t current,
+	uint32_t total,
 	void *payload);
 
 /**

src/pack-objects.h

@@ -42,8 +42,8 @@ typedef struct git_pobject {
 					    * me */
 
 	void *delta_data;
-	unsigned long delta_size;
-	unsigned long z_delta_size;
+	size_t delta_size;
+	size_t z_delta_size;
 
 	int written:1,
 	    recursing:1,
@@ -65,10 +65,11 @@ struct git_packbuilder {
 	git_zstream zstream;
 
 	uint32_t nr_objects,
-		 nr_deltified,
-		 nr_alloc,
-		 nr_written,
-		 nr_remaining;
+		nr_deltified,
+		nr_written,
+		nr_remaining;
+
+	size_t nr_alloc;
 
 	git_pobject *object_list;
 
@@ -85,13 +86,13 @@ struct git_packbuilder {
 	git_cond progress_cond;
 
 	/* configs */
-	uint64_t delta_cache_size;
-	uint64_t max_delta_cache_size;
-	uint64_t cache_max_small_delta_size;
-	uint64_t big_file_threshold;
-	uint64_t window_memory_limit;
+	size_t delta_cache_size;
+	size_t max_delta_cache_size;
+	size_t cache_max_small_delta_size;
+	size_t big_file_threshold;
+	size_t window_memory_limit;
 
-	int nr_threads; /* nr of threads to use */
+	unsigned int nr_threads; /* nr of threads to use */
 
 	git_packbuilder_progress progress_cb;
 	void *progress_cb_payload;

src/patch_generate.c

@@ -284,7 +284,7 @@ static int create_binary(
 	size_t b_datalen)
 {
 	git_buf deflate = GIT_BUF_INIT, delta = GIT_BUF_INIT;
-	unsigned long delta_data_len;
+	size_t delta_data_len;
 	int error;
 
 	/* The git_delta function accepts unsigned long only */
@@ -310,7 +310,7 @@ static int create_binary(
 
 		if (error == 0) {
 			error = git_zstream_deflatebuf(
-				&delta, delta_data, (size_t)delta_data_len);
+				&delta, delta_data, delta_data_len);
 
 			git__free(delta_data);
 		} else if (error == GIT_EBUFS) {