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mingw.c: Fix complier warnings for a 64 bit msvc

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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 <soekkle@freenet.de>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
This commit is contained in:
Sören Krecker
2024-10-17 19:18:20 +02:00
committed by Taylor Blau
parent 15030f9556
commit 386d372031
3 changed files with 21 additions and 12 deletions
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4
compat/compiler.h
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@ -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());