Get Cosmopolitan into releasable state

A new rollup tool now exists for flattening out the headers in a way
that works better for our purposes than cpp. A lot of the API clutter
has been removed. APIs that aren't a sure thing in terms of general
recommendation are now marked internal.

There's now a smoke test for the amalgamation archive and gigantic
header file. So we can now guarantee you can use this project on the
easiest difficulty setting without the gigantic repository.

A website is being created, which is currently a work in progress:
https://justine.storage.googleapis.com/cosmopolitan/index.html

libc/nexgen32e/tinystrlen.internal.h

@@ -0,0 +1,55 @@
+#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_TINYSTRLEN_H_
+#define COSMOPOLITAN_LIBC_NEXGEN32E_TINYSTRLEN_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+#if !defined(__GNUC__) || defined(__STRICT_ANSI__)
+
+int tinystrlen(const char *);
+int tinystrnlen(const char *, size_t);
+int tinystrlen16(const char16_t *);
+int tinystrnlen16(const char16_t *, size_t);
+int tinywcslen(const wchar_t *);
+int tinywcsnlen(const wchar_t *, size_t);
+
+#else
+
+forceinline int tinystrlen(const char *s) {
+  unsigned ax;
+  asm("call\ttinystrlen" : "=a"(ax) : "D"(s), "m"(*(char(*)[PAGESIZE])s));
+  return ax;
+}
+
+forceinline int tinystrnlen(const char *s, size_t n) {
+  unsigned ax;
+  asm("call\ttinystrnlen" : "=a"(ax) : "D"(s), "S"(n), "m"(*(char(*)[n])s));
+  return ax;
+}
+
+forceinline int tinystrlen16(const char16_t *s) {
+  unsigned ax;
+  asm("call\ttinystrlen16" : "=a"(ax) : "D"(s), "m"(*(char16_t(*)[PAGESIZE])s));
+  return ax;
+}
+
+forceinline int tinystrnlen16(const char16_t *s, size_t n) {
+  unsigned ax;
+  asm("call\ttinystrnlen16"
+      : "=a"(ax)
+      : "D"(s), "S"(n), "m"(*(char16_t(*)[n])s));
+  return ax;
+}
+
+forceinline int tinywcslen(const wchar_t *s) {
+  unsigned ax;
+  asm("call\ttinywcslen" : "=a"(ax) : "D"(s), "m"(*(wchar_t(*)[PAGESIZE])s));
+  return ax;
+}
+
+forceinline int tinywcsnlen(const wchar_t *s, size_t n) {
+  unsigned ax;
+  asm("call\ttinywcsnlen" : "=a"(ax) : "D"(s), "S"(n), "m"(*(wchar_t(*)[n])s));
+  return ax;
+}
+
+#endif
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_TINYSTRLEN_H_ */