Import C++ Standard Template Library

You can now use the hardest fastest and most dangerous language there is
with Cosmopolitan. So far about 75% of LLVM libcxx has been added. A few
breaking changes needed to be made to help this go smoothly.

- Rename nothrow to dontthrow
- Rename nodiscard to dontdiscard
- Add some libm functions, e.g. lgamma, nan, etc.
- Change intmax_t from int128 to int64 like everything else
- Introduce %jjd formatting directive for int128_t
- Introduce strtoi128(), strtou128(), etc.
- Rename bsrmax() to bsr128()

Some of the templates that should be working currently are std::vector,
std::string, std::map, std::set, std::deque, etc.

tool/decode/lib/asmcodegen.c

@@ -35,7 +35,7 @@ char *format(char *buf, const char *fmt, ...) {
   return buf;
 }
 
-nodiscard char *tabpad(const char *s, unsigned width) {
+dontdiscard char *tabpad(const char *s, unsigned width) {
   char *p;
   size_t i, l, need;
   l = strlen(s);

tool/decode/lib/asmcodegen.h

@@ -6,20 +6,20 @@ COSMOPOLITAN_C_START_
 
 #define COLUMN_WIDTH 24
 
-#define showint(x) show(".long", format(b1, "%d", x), #x)
-#define showint64(x) show(".quad", format(b1, "%ld", x), #x)
-#define showbyte(x) show(".byte", format(b1, "%hhn", x), #x)
-#define showshort(x) show(".short", format(b1, "%hn", x), #x)
+#define showint(x)      show(".long", format(b1, "%d", x), #x)
+#define showint64(x)    show(".quad", format(b1, "%ld", x), #x)
+#define showbyte(x)     show(".byte", format(b1, "%hhn", x), #x)
+#define showshort(x)    show(".short", format(b1, "%hn", x), #x)
 #define showshorthex(x) show(".short", format(b1, "%#-6hX", x), #x)
-#define showinthex(x) show(".long", format(b1, "%#X", x), #x)
+#define showinthex(x)   show(".long", format(b1, "%#X", x), #x)
 #define showint64hex(x) show(".quad", format(b1, "%#lX", x), #x)
-#define showorg(x) show(".org", format(b1, "%#lX", x), #x)
+#define showorg(x)      show(".org", format(b1, "%#lX", x), #x)
 
 extern char b1[BUFSIZ];
 extern char b2[BUFSIZ];
 
 char *format(char *buf, const char *fmt, ...);
-nodiscard char *tabpad(const char *s, unsigned width);
+char *tabpad(const char *s, unsigned width) dontdiscard;
 void show(const char *directive, const char *value, const char *comment);
 
 COSMOPOLITAN_C_END_

tool/decode/lib/flagger.c

@@ -29,7 +29,7 @@
  * @param id is the flags
  * @return NUL-terminated string that needs free()
  */
-nodiscard char *RecreateFlags(const struct IdName *names, unsigned long id) {
+dontdiscard char *RecreateFlags(const struct IdName *names, unsigned long id) {
   bool first;
   size_t bufi, bufn;
   char *bufp, extrabuf[20];

tool/decode/lib/flagger.h

@@ -4,7 +4,7 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
-char *RecreateFlags(const struct IdName *, unsigned long) nodiscard;
+char *RecreateFlags(const struct IdName *, unsigned long) dontdiscard;
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */

tool/decode/mkcombos.c

@@ -105,7 +105,7 @@ int main(int argc, char *argv[]) {
     strsep(&tok, ";");
     category = strsep(&tok, ";");
     if (!s1 || !category) continue;
-    bit = strtoimax(s1, NULL, 16);
+    bit = strtol(s1, NULL, 16);
     if (bit != 0x00AD &&
         ((0x1160 <= bit && bit <= 0x11FF) ||
          (strcmp(category, "Me") == 0 || strcmp(category, "Mn") == 0 ||

tool/decode/zip.c

@@ -46,12 +46,12 @@
  * @fileoverview Zip File Disassembler.
  */
 
-nodiscard char *FormatDosDate(uint16_t dosdate) {
+dontdiscard char *FormatDosDate(uint16_t dosdate) {
   return xasprintf("%04u-%02u-%02u", ((dosdate >> 9) & 0b1111111) + 1980,
                    (dosdate >> 5) & 0b1111, dosdate & 0b11111);
 }
 
-nodiscard char *FormatDosTime(uint16_t dostime) {
+dontdiscard char *FormatDosTime(uint16_t dostime) {
   return xasprintf("%02u:%02u:%02u", (dostime >> 11) & 0b11111,
                    (dostime >> 5) & 0b111111, (dostime << 1) & 0b111110);
 }