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Diffstat (limited to 'src/os-win32.h')
| -rw-r--r-- | src/os-win32.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/os-win32.h b/src/os-win32.h new file mode 100644 index 0000000..51d2dc2 --- /dev/null +++ b/src/os-win32.h @@ -0,0 +1,100 @@ +/* + * Copyright © 2021 Michael Smith <mikesmiffy128@gmail.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* Windows-specific definitions for os.h - don't include this directly! */ + +#define IMPORT __declspec(dllimport) // only needed for variables +#define EXPORT __declspec(dllexport) + +typedef unsigned short os_char; +#define _OS_CAT(L, x) L##x +#define OS_LIT(x) _OS_CAT(L, x) + +#define os_snprintf _snwprintf +#define os_strchr wcschr +#define os_strcmp wcscmp +#define os_strcpy wcscpy +#define os_strlen wcslen +#define strncasecmp _strnicmp // stupid! + +#define os_fopen _wfopen +// yuck :( +#define _os_open3(path, flags, mode) _wopen((path), (flags) | _O_BINARY, (mode)) +#define _os_open2(path, flags) _wopen((path), (flags) | _O_BINARY) +#define _os_open(a, b, c, x, ...) x +#define os_open(...) _os_open(__VA_ARGS__, _os_open3, _os_open2, _)(__VA_ARGS__) +#define os_access _waccess +// ucrt defines __stat64 to _stat64. we want _wstat64 to be the actual function +#define _stat64(path, buf) _wstat64(path, buf) +#define os_stat _stat64 +#define os_getenv _wgetenv + +#define OS_DLSUFFIX ".dll" + +#define OS_MAIN wmain + +static inline void *os_dlsym(void *m, const char *s) { + return (void *)GetProcAddress(m, s); +} + +static inline bool os_mprot(void *addr, int len, int fl) { + unsigned long old; + return !!VirtualProtect(addr, len, fl, &old); +} + +// SystemFunction036 is the *real* name of "RtlGenRandom," and is also +// incorrectly defined in system headers. Yay. +int __stdcall SystemFunction036(void *buf, unsigned long sz); + +static inline void os_randombytes(void *buf, int sz) { + // if this call fails, the system is doomed, so loop until success and pray. + while (!SystemFunction036(buf, sz)); +} + +/* Further Windows-specific workarounds because Windows is great */ + +#ifndef PATH_MAX +// XXX: win32/crt has this dumb 260 limit even though the actual kernel imposes +// no limit (though apparently NTFS has a limit of 65535). Theoerically we could +// do some memes with UNC paths to extend it to at least have parity with Unix +// PATH_MAX (4096), but for now we just kind of accept that Windows is a +// disaster. +#define PATH_MAX MAX_PATH +#endif + +// why does Windows prefix so many things with underscores? +#define alloca _alloca +#define read _read +#define write _write +#define close _close +#define O_RDONLY _O_RDONLY +#define O_RDWR _O_RDWR +#define O_CLOEXEC _O_NOINHERIT // and why did they rename this!? +#define O_CREAT _O_CREAT +#define O_EXCL _O_EXCL +// missing access() flags +#define F_OK 0 +#define R_OK 4 +#define W_OK 2 +#define X_OK R_OK // there's no actual X bit, just pretend + +// just dump this boilerplate here as well, I spose +#define OS_WINDOWS_ERROR(arrayname) \ + FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, 0, GetLastError(), \ + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), arrayname, \ + sizeof(arrayname), 0) + +// vi: sw=4 ts=4 noet tw=80 cc=80 |