Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

libc/str/crc32z.c

@@ -16,11 +16,21 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/bits/safemacros.internal.h"
+#include "libc/dce.h"
+#include "libc/intrin/asan.internal.h"
+#include "libc/macros.internal.h"
 #include "libc/nexgen32e/crc32.h"
 #include "libc/nexgen32e/x86feature.h"
+#include "libc/str/str.h"
 
-static uint32_t kCrc32Tab[256];
+static inline noasan uint64_t WildRead64(const signed char *p) {
+  return (uint64_t)(255 & p[7]) << 070 | (uint64_t)(255 & p[6]) << 060 |
+         (uint64_t)(255 & p[5]) << 050 | (uint64_t)(255 & p[4]) << 040 |
+         (uint64_t)(255 & p[3]) << 030 | (uint64_t)(255 & p[2]) << 020 |
+         (uint64_t)(255 & p[1]) << 010 | (uint64_t)(255 & p[0]) << 000;
+}
 
 /**
  * Computes Phil Katz CRC-32 used by zip/zlib/gzip/etc.
@@ -34,28 +44,29 @@ static uint32_t kCrc32Tab[256];
  * @param h is initial value
  */
 uint32_t crc32_z(uint32_t h, const void *data, size_t size) {
-  const unsigned char *p, *pe;
+  size_t n;
   static bool once;
-  size_t skip;
+  const unsigned char *p, *e;
+  static uint32_t kCrc32Tab[256];
   if (!once) {
     crc32init(kCrc32Tab, 0xedb88320);
-    once = true;
+    once = 0;
   }
-  if (data) {
-    h ^= 0xffffffff;
-    if (size >= 64 && X86_HAVE(PCLMUL)) {
-      h = crc32_pclmul(h, data, size); /* 51x faster */
-      skip = rounddown(size, 16);
-    } else {
-      skip = 0;
-    }
-    p = (const unsigned char *)data + skip;
-    pe = (const unsigned char *)data + size;
-    while (p < pe) {
+  if (size == -1) {
+    size = data ? strlen(data) : 0;
+  }
+  p = data;
+  e = p + size;
+  h ^= 0xffffffff;
+  if (X86_HAVE(PCLMUL)) {
+    while (((intptr_t)p & 15) && p < e)
       h = h >> 8 ^ kCrc32Tab[(h & 0xff) ^ *p++];
+    if ((n = ROUNDDOWN(e - p, 16)) >= 64) {
+      if (IsAsan()) __asan_verify(p, n);
+      h = crc32_pclmul(h, p, n); /* 51x faster */
+      p += n;
     }
-    return h ^ 0xffffffff;
-  } else {
-    return 0;
   }
+  while (p < e) h = h >> 8 ^ kCrc32Tab[(h & 0xff) ^ *p++];
+  return h ^ 0xffffffff;
 }