[PATCH 03/10] compat/win32: fix -Wsign-compare warning in "wWinMain()"

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GCC generates a warning in "headless.c" because we compare `slash` with
`size`, where the former is an `int` and the latter is a `size_t`. Fix
the warning by storing `slash` as a `size_t`, as well.

This commit is being singled out because the file does not include the
"git-compat-util.h" header, and consequently, we cannot easily mark it
with the `DISABLE_SIGN_COMPARE_WARNING` macro.

Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
 compat/win32/headless.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/compat/win32/headless.c b/compat/win32/headless.c
index 11392a0b9a6dac5522bc5042064f492bd73cc871..a6eb116ddc7b586fea80f46ac36d50a4b3ddb656 100644
--- a/compat/win32/headless.c
+++ b/compat/win32/headless.c
@@ -53,7 +53,8 @@ int WINAPI wWinMain(_In_ HINSTANCE instance,
 	wchar_t git_command_line[32768];
 	size_t size = sizeof(git_command_line) / sizeof(wchar_t);
 	const wchar_t *needs_quotes = L"";
-	int slash = 0, i;
+	size_t slash = 0;
+	int len;
 
 	STARTUPINFO startup_info = {
 		.cb = sizeof(STARTUPINFO),
@@ -66,7 +67,7 @@ int WINAPI wWinMain(_In_ HINSTANCE instance,
 	DWORD exit_code;
 
 	/* First, determine the full path of argv[0] */
-	for (i = 0; _wpgmptr[i]; i++)
+	for (size_t i = 0; _wpgmptr[i]; i++)
 		if (_wpgmptr[i] == L' ')
 			needs_quotes = L"\"";
 		else if (_wpgmptr[i] == L'\\')
@@ -79,16 +80,16 @@ int WINAPI wWinMain(_In_ HINSTANCE instance,
 	extend_path(_wpgmptr, slash);
 
 	/* Then, add the full path of `git.exe` as argv[0] */
-	i = swprintf_s(git_command_line, size, L"%ls%.*ls\\git.exe%ls",
-		       needs_quotes, slash, _wpgmptr, needs_quotes);
-	if (i < 0)
+	len = swprintf_s(git_command_line, size, L"%ls%.*ls\\git.exe%ls",
+			 needs_quotes, (int) slash, _wpgmptr, needs_quotes);
+	if (len < 0)
 		return 127; /* Too long path */
 
 	if (*command_line) {
 		/* Now, append the command-line arguments */
-		i = swprintf_s(git_command_line + i, size - i,
-			       L" %ls", command_line);
-		if (i < 0)
+		len = swprintf_s(git_command_line + len, size - len,
+				 L" %ls", command_line);
+		if (len < 0)
 			return 127;
 	}
 

-- 
2.47.0.366.g5daf58cba8.dirty





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