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

third_party/chibicc/as.c

@@ -453,7 +453,7 @@ static bool IsPunctMergeable(int c) {
 
 static char *PunctToStr(int p, char b[4]) {
   int c, i, j;
-  memset(b, 0, 4);
+  bzero(b, 4);
   for (j = 0, i = 2; i >= 0; --i) {
     if ((c = (p >> (i * 8)) & 0xff)) {
       b[j++] = c;
@@ -494,7 +494,7 @@ static int AppendSauce(struct As *a, int path, int line) {
 
 static void AppendExpr(struct As *a) {
   APPEND(a->exprs);
-  memset(a->exprs.p + a->exprs.n - 1, 0, sizeof(*a->exprs.p));
+  bzero(a->exprs.p + a->exprs.n - 1, sizeof(*a->exprs.p));
   a->exprs.p[a->exprs.n - 1].tok = a->i;
   a->exprs.p[a->exprs.n - 1].lhs = -1;
   a->exprs.p[a->exprs.n - 1].rhs = -1;
@@ -502,17 +502,17 @@ static void AppendExpr(struct As *a) {
 
 static void AppendThing(struct As *a) {
   APPEND(a->things);
-  memset(a->things.p + a->things.n - 1, 0, sizeof(*a->things.p));
+  bzero(a->things.p + a->things.n - 1, sizeof(*a->things.p));
 }
 
 static void AppendRela(struct As *a) {
   APPEND(a->relas);
-  memset(a->relas.p + a->relas.n - 1, 0, sizeof(*a->relas.p));
+  bzero(a->relas.p + a->relas.n - 1, sizeof(*a->relas.p));
 }
 
 static void AppendSlice(struct As *a) {
   APPEND(a->slices);
-  memset(a->slices.p + a->slices.n - 1, 0, sizeof(*a->slices.p));
+  bzero(a->slices.p + a->slices.n - 1, sizeof(*a->slices.p));
 }
 
 static int AppendSection(struct As *a, int name, int flags, int type) {
@@ -810,7 +810,7 @@ static void Tokenize(struct As *a, int path) {
       continue;
     }
     if (c == '"') {
-      memset(&buf, 0, sizeof(buf));
+      bzero(&buf, sizeof(buf));
       for (i = 1; (c = p[i++]);) {
         if (c == '"') break;
         c = ReadCharLiteral(&buf, c, p, &i);
@@ -1542,7 +1542,7 @@ static void OnLongDouble(struct As *a, int n) {
     } else {
       f = GetInt(a);
     }
-    memset(b, 0, 16);
+    bzero(b, 16);
     memcpy(b, &f, sizeof(f));
     EmitData(a, b, n);
     if (IsSemicolon(a)) break;