Introduce GIT_CALLBACK macro to enforce cdecl

Since we now always build the library with cdecl calling conventions,
our callbacks should be decorated as such so that users will not be able
to provide callbacks defined with other calling conventions.

The `GIT_CALLBACK` macro will inject the `__cdecl` attribute as
appropriate.

1 files changed, 10 insertions, 10 deletions

diff --git a/include/git2/diff.h b/include/git2/diff.h
index b64bf2013..b920385ee 100644
--- a/include/git2/diff.h
+++ b/include/git2/diff.h
@@ -328,7 +328,7 @@ typedef struct {
  * - returns 0, the delta is inserted into the diff, and the diff process
  *		continues.
  */
-typedef int (*git_diff_notify_cb)(
+typedef int GIT_CALLBACK(git_diff_notify_cb)(
 	const git_diff *diff_so_far,
 	const git_diff_delta *delta_to_add,
 	const char *matched_pathspec,
@@ -344,7 +344,7 @@ typedef int (*git_diff_notify_cb)(
  * @param new_path The path to the new file or NULL.
  * @return Non-zero to abort the diff.
  */
-typedef int (*git_diff_progress_cb)(
+typedef int GIT_CALLBACK(git_diff_progress_cb)(
 	const git_diff *diff_so_far,
 	const char *old_path,
 	const char *new_path,
@@ -462,7 +462,7 @@ GIT_EXTERN(int) git_diff_init_options(
  * @param progress Goes from 0 to 1 over the diff
  * @param payload User-specified pointer from foreach function
  */
-typedef int (*git_diff_file_cb)(
+typedef int GIT_CALLBACK(git_diff_file_cb)(
 	const git_diff_delta *delta,
 	float progress,
 	void *payload);
@@ -528,7 +528,7 @@ typedef struct {
  * When iterating over a diff, callback that will be made for
  * binary content within the diff.
  */
-typedef int(*git_diff_binary_cb)(
+typedef int GIT_CALLBACK(git_diff_binary_cb)(
 	const git_diff_delta *delta,
 	const git_diff_binary *binary,
 	void *payload);
@@ -554,7 +554,7 @@ typedef struct {
 /**
  * When iterating over a diff, callback that will be made per hunk.
  */
-typedef int (*git_diff_hunk_cb)(
+typedef int GIT_CALLBACK(git_diff_hunk_cb)(
 	const git_diff_delta *delta,
 	const git_diff_hunk *hunk,
 	void *payload);
@@ -615,7 +615,7 @@ typedef struct {
  * of text.  This uses some extra GIT_DIFF_LINE_... constants for output
  * of lines of file and hunk headers.
  */
-typedef int (*git_diff_line_cb)(
+typedef int GIT_CALLBACK(git_diff_line_cb)(
 	const git_diff_delta *delta, /**< delta that contains this data */
 	const git_diff_hunk *hunk,   /**< hunk containing this data */
 	const git_diff_line *line,   /**< line data */
@@ -699,14 +699,14 @@ typedef enum {
  * Pluggable similarity metric
  */
 typedef struct {
-	int (*file_signature)(
+	int GIT_CALLBACK(file_signature)(
 		void **out, const git_diff_file *file,
 		const char *fullpath, void *payload);
-	int (*buffer_signature)(
+	int GIT_CALLBACK(buffer_signature)(
 		void **out, const git_diff_file *file,
 		const char *buf, size_t buflen, void *payload);
-	void (*free_signature)(void *sig, void *payload);
-	int (*similarity)(int *score, void *siga, void *sigb, void *payload);
+	void GIT_CALLBACK(free_signature)(void *sig, void *payload);
+	int GIT_CALLBACK(similarity)(int *score, void *siga, void *sigb, void *payload);
 	void *payload;
 } git_diff_similarity_metric;