From 386d372031a76e508591090b09630e1af72c5c9d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?S=C3=B6ren=20Krecker?= Date: Thu, 17 Oct 2024 19:18:20 +0200 Subject: [PATCH] mingw.c: Fix complier warnings for a 64 bit msvc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Remove some complier warnings from msvc in compat/mingw.c for value truncation from 64 bit to 32 bit integers. Compiling compat/mingw.c under a 64 bit version of msvc produces warnings. An "int" is 32 bit, and ssize_t or size_t should be 64 bit long. Prepare compat/vcbuild/include/unistd.h to have a 64 bit type _ssize_t, when _WIN64 is defined and 32 bit otherwise. Further down in this include file, as before, ssize_t is defined as _ssize_t, if needed. Use size_t instead of int for all variables that hold the result of strlen() or wcslen() (which cannot be negative). Use ssize_t to hold the return value of read(). Signed-off-by: Sören Krecker Signed-off-by: Taylor Blau --- compat/compiler.h | 4 ++-- compat/mingw.c | 25 +++++++++++++++---------- compat/vcbuild/include/unistd.h | 4 ++++ 3 files changed, 21 insertions(+), 12 deletions(-) diff --git a/compat/compiler.h b/compat/compiler.h index e9ad9db84f..e12e426404 100644 --- a/compat/compiler.h +++ b/compat/compiler.h @@ -9,7 +9,7 @@ static inline void get_compiler_info(struct strbuf *info) { - int len = info->len; + size_t len = info->len; #ifdef __clang__ strbuf_addf(info, "clang: %s\n", __clang_version__); #elif defined(__GNUC__) @@ -27,7 +27,7 @@ static inline void get_compiler_info(struct strbuf *info) static inline void get_libc_info(struct strbuf *info) { - int len = info->len; + size_t len = info->len; #ifdef __GLIBC__ strbuf_addf(info, "glibc: %s\n", gnu_get_libc_version()); diff --git a/compat/mingw.c b/compat/mingw.c index 0e851ecae2..0ff550cef3 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -782,7 +782,7 @@ static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts) */ static int has_valid_directory_prefix(wchar_t *wfilename) { - int n = wcslen(wfilename); + size_t n = wcslen(wfilename); while (n > 0) { wchar_t c = wfilename[--n]; @@ -891,7 +891,7 @@ static int do_lstat(int follow, const char *file_name, struct stat *buf) */ static int do_stat_internal(int follow, const char *file_name, struct stat *buf) { - int namelen; + size_t namelen; char alt_name[PATH_MAX]; if (!do_lstat(follow, file_name, buf)) @@ -1274,7 +1274,8 @@ static const char *parse_interpreter(const char *cmd) { static char buf[100]; char *p, *opt; - int n, fd; + ssize_t n; /* read() can return negative values */ + int fd; /* don't even try a .exe */ n = strlen(cmd); @@ -1339,7 +1340,7 @@ static char *path_lookup(const char *cmd, int exe_only) { const char *path; char *prog = NULL; - int len = strlen(cmd); + size_t len = strlen(cmd); int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe"); if (strpbrk(cmd, "/\\")) @@ -1956,7 +1957,7 @@ char *mingw_getenv(const char *name) #define GETENV_MAX_RETAIN 64 static char *values[GETENV_MAX_RETAIN]; static int value_counter; - int len_key, len_value; + size_t len_key, len_value; wchar_t *w_key; char *value; wchar_t w_value[32768]; @@ -1968,7 +1969,8 @@ char *mingw_getenv(const char *name) /* We cannot use xcalloc() here because that uses getenv() itself */ w_key = calloc(len_key, sizeof(wchar_t)); if (!w_key) - die("Out of memory, (tried to allocate %u wchar_t's)", len_key); + die("Out of memory, (tried to allocate %"PRIuMAX" wchar_t's)", + (uintmax_t)len_key); xutftowcs(w_key, name, len_key); /* GetEnvironmentVariableW() only sets the last error upon failure */ SetLastError(ERROR_SUCCESS); @@ -1983,7 +1985,8 @@ char *mingw_getenv(const char *name) /* We cannot use xcalloc() here because that uses getenv() itself */ value = calloc(len_value, sizeof(char)); if (!value) - die("Out of memory, (tried to allocate %u bytes)", len_value); + die("Out of memory, (tried to allocate %"PRIuMAX" bytes)", + (uintmax_t)len_value); xwcstoutf(value, w_value, len_value); /* @@ -2001,7 +2004,7 @@ char *mingw_getenv(const char *name) int mingw_putenv(const char *namevalue) { - int size; + size_t size; wchar_t *wide, *equal; BOOL result; @@ -2011,7 +2014,8 @@ int mingw_putenv(const char *namevalue) size = strlen(namevalue) * 2 + 1; wide = calloc(size, sizeof(wchar_t)); if (!wide) - die("Out of memory, (tried to allocate %u wchar_t's)", size); + die("Out of memory, (tried to allocate %" PRIuMAX " wchar_t's)", + (uintmax_t)size); xutftowcs(wide, namevalue, size); equal = wcschr(wide, L'='); if (!equal) @@ -3085,7 +3089,8 @@ static void maybe_redirect_std_handles(void) */ int wmain(int argc, const wchar_t **wargv) { - int i, maxlen, exit_status; + int i, exit_status; + size_t maxlen; char *buffer, **save; const char **argv; diff --git a/compat/vcbuild/include/unistd.h b/compat/vcbuild/include/unistd.h index 3a959d124c..a261a925b7 100644 --- a/compat/vcbuild/include/unistd.h +++ b/compat/vcbuild/include/unistd.h @@ -14,7 +14,11 @@ typedef _mode_t mode_t; #ifndef _SSIZE_T_ #define _SSIZE_T_ +#ifdef _WIN64 +typedef __int64 _ssize_t; +#else typedef long _ssize_t; +#endif /* _WIN64 */ #ifndef _OFF_T_ #define _OFF_T_