clean up platform checks

ostd/context_stack.hh

@@ -24,10 +24,6 @@
 
 #include "ostd/platform.hh"
 
-#if !defined(OSTD_PLATFORM_POSIX) && !defined(OSTD_PLATFORM_WIN32)
-#  error "Unsupported platform"
-#endif
-
 #ifdef OSTD_USE_VALGRIND
 #  include <valgrind/valgrind.h>
 #endif

ostd/process.hh

@@ -21,11 +21,6 @@
 #include <vector>
 
 #include "ostd/platform.hh"
-
-#if !defined(OSTD_PLATFORM_POSIX) && !defined(OSTD_PLATFORM_WIN32)
-#  error "Unsupported platform"
-#endif
-
 #include "ostd/string.hh"
 #include "ostd/range.hh"
 #include "ostd/io.hh"

ostd/stream.hh

@@ -44,10 +44,6 @@
 
 #include "ostd/platform.hh"
 
-#if !defined(OSTD_PLATFORM_POSIX) && !defined(OSTD_PLATFORM_WIN32)
-#  error "Unsupported platform"
-#endif
-
 #ifndef OSTD_PLATFORM_WIN32
 #include <sys/types.h>
 #endif
@@ -62,16 +58,18 @@ namespace ostd {
  * @{
  */
 
-#ifndef OSTD_PLATFORM_WIN32
+#if defined(OSTD_PLATFORM_POSIX) || defined(OSTD_GENERATING_DOC)
 /** @brief The stream offset type.
  *
  * This is a signed integer type that can represent file sizes and offsets.
  * On POSIX systems, it defaults to the POSIX `off_t` type. On Windows, it's
- * a signed 64-bit integer.
+ * a signed 64-bit integer. On other systems it's `long`.
  */
 using stream_off_t = off_t;
-#else
+#elif defined(OSTD_PLATFORM_WIN32)
 using stream_off_t = __int64;
+#else
+using stream_off_t = long;
 #endif
 
 /** @brief Reference position for seeking.

src/context_stack.cc

@@ -5,12 +5,10 @@
 
 #include "ostd/platform.hh"
 
-#ifdef OSTD_PLATFORM_WIN32
+#if defined(OSTD_PLATFORM_WIN32)
 #  include "src/win32/context_stack.cc"
-#else
-#ifdef OSTD_PLATFORM_POSIX
+#elif defined(OSTD_PLATFORM_POSIX)
 #  include "src/posix/context_stack.cc"
 #else
 #  error "Unsupported platform"
 #endif
-#endif

src/process.cc

@@ -5,12 +5,10 @@
 
 #include "ostd/platform.hh"
 
-#ifdef OSTD_PLATFORM_WIN32
+#if defined(OSTD_PLATFORM_WIN32)
 #  include "src/win32/process.cc"
-#else
-#ifdef OSTD_PLATFORM_POSIX
+#elif defined(OSTD_PLATFORM_POSIX)
 #  include "src/posix/process.cc"
 #else
 #  error "Unsupported platform"
 #endif
-#endif