Make important improvements

- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems

libc/fmt/bing.c

@@ -19,6 +19,7 @@
 #include "libc/assert.h"
 #include "libc/fmt/bing.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Turns binary octet into unicode glyph representation.

libc/fmt/stoa.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/assert.h"
 #include "libc/fmt/fmt.internal.h"
 #include "libc/fmt/internal.h"
 #include "libc/intrin/bits.h"
@@ -26,6 +25,7 @@
 #include "libc/intrin/weaken.h"
 #include "libc/str/str.h"
 #include "libc/str/strwidth.h"
+#include "libc/str/tab.internal.h"
 #include "libc/str/thompike.h"
 #include "libc/str/unicode.h"
 #include "libc/str/utf16.h"

libc/fmt/strtoi128.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes 128-bit signed integer from ASCII string.

libc/fmt/strtoimax.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes intmax_t from ASCII string.

libc/fmt/strtol.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes signed integer from ASCII string.

libc/fmt/strtou128.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes 128-bit unsigned integer from ASCII string.

libc/fmt/strtoul.c

@@ -20,6 +20,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes unsigned integer from ASCII string.

libc/fmt/strtoumax.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes uintmax_t from ASCII string.

libc/fmt/unbing.c

@@ -21,6 +21,7 @@
 #include "libc/nexgen32e/nexgen32e.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 static const int kCp437iMultimappings[] = {
     u'\n' << 8 | '\n',   // NEWLINE

libc/fmt/vcscanf.c

@@ -23,6 +23,7 @@
 #include "libc/runtime/runtime.h"
 #include "libc/str/oldutf16.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/str/tpdecodecb.internal.h"
 #include "libc/str/utf16.h"
 #include "libc/sysv/errfuns.h"

libc/fmt/wcstoi128.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes 128-bit signed integer from wide string.

libc/fmt/wcstoimax.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes intmax_t from wide string.

libc/fmt/wcstol.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes signed long integer from wide string.

libc/fmt/wcstoll.c

@@ -21,6 +21,7 @@
 #include "libc/fmt/strtol.internal.h"
 #include "libc/limits.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes signed long long integer from wide string.

libc/fmt/wcstou128.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes 128-bit unsigned integer from wide string.

libc/fmt/wcstoul.c

@@ -20,6 +20,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes unsigned integer from wide string.

libc/fmt/wcstoull.c

@@ -20,6 +20,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes unsigned long long integer from wide string.

libc/fmt/wcstoumax.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/strtol.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 /**
  * Decodes uintmax_t from wide string.