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

tool/build/lib/pty.c

@@ -41,14 +41,14 @@
  *
  *   \t                                  TAB
  *   \a                                  BELL
+ *   \177                                BACKSPACE
  *   \r                                  CURSOR START
- *   \b                                  CURSOR LEFT
- *   \177                                CURSOR LEFT
+ *   \b                                  CURSOR LEFT OR CURSOR REWIND
  *   \n                                  CURSOR DOWN AND START IF OPOST
  *   \f                                  CURSOR DOWN AND START IF OPOST
- *   \v                                  CURSOR DOWN AND START IF OPOST
- *   \eD                                 CURSOR DOWN AND START
- *   \eE                                 CURSOR DOWN
+ *   \v                                  CURSOR DOWN AND START OR \e[H\e[J
+ *   \eE                                 CURSOR DOWN AND START
+ *   \eD                                 CURSOR DOWN
  *   \eM                                 CURSOR UP
  *   \ec                                 FULL RESET
  *   \e7                                 SAVE CURSOR POSITION
@@ -331,7 +331,7 @@ static void PtySetCodepage(struct Pty *pty, char id) {
 void PtyErase(struct Pty *pty, long dst, long n) {
   DCHECK_LE(dst + n, pty->yn * pty->xn);
   wmemset((void *)(pty->wcs + dst), ' ', n);
-  wmemset((void *)(pty->prs + dst), 0, n);
+  bzero((void *)(pty->prs + dst), n);
 }
 
 void PtyMemmove(struct Pty *pty, long dst, long src, long n) {
@@ -729,7 +729,7 @@ static void PtySelectGraphicsRendition(struct Pty *pty) {
   x = 0;
   t = kSgr;
   p = pty->esc.s;
-  memset(code, 0, sizeof(code));
+  bzero(code, sizeof(code));
   for (;;) {
     c = *p++;
     switch (c) {