Make more libc improvements

- Make memmem() faster
- Make readdir() thread safe
- Remove 64kb limit from mkdeps.com
- Add old crypt() function from Musl
- Improve new fix-third-party.py tool
- Improve libc/isystem/ headers and fix bugs

third_party/mbedtls/sha512.c

@@ -18,6 +18,7 @@
 #include "libc/intrin/asan.internal.h"
 #include "libc/literal.h"
 #include "libc/macros.internal.h"
+#include "libc/nexgen32e/nexgen32e.h"
 #include "libc/nexgen32e/x86feature.h"
 #include "libc/str/str.h"
 #include "third_party/mbedtls/chk.h"
@@ -130,53 +131,6 @@ int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 )
 
 #if !defined(MBEDTLS_SHA512_PROCESS_ALT)
 
-/*
- * Round constants
- */
-static const uint64_t K[80] =
-{
-    0x428A2F98D728AE22, 0x7137449123EF65CD,
-    0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC,
-    0x3956C25BF348B538, 0x59F111F1B605D019,
-    0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118,
-    0xD807AA98A3030242, 0x12835B0145706FBE,
-    0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2,
-    0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1,
-    0x9BDC06A725C71235, 0xC19BF174CF692694,
-    0xE49B69C19EF14AD2, 0xEFBE4786384F25E3,
-    0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65,
-    0x2DE92C6F592B0275, 0x4A7484AA6EA6E483,
-    0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5,
-    0x983E5152EE66DFAB, 0xA831C66D2DB43210,
-    0xB00327C898FB213F, 0xBF597FC7BEEF0EE4,
-    0xC6E00BF33DA88FC2, 0xD5A79147930AA725,
-    0x06CA6351E003826F, 0x142929670A0E6E70,
-    0x27B70A8546D22FFC, 0x2E1B21385C26C926,
-    0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF,
-    0x650A73548BAF63DE, 0x766A0ABB3C77B2A8,
-    0x81C2C92E47EDAEE6, 0x92722C851482353B,
-    0xA2BFE8A14CF10364, 0xA81A664BBC423001,
-    0xC24B8B70D0F89791, 0xC76C51A30654BE30,
-    0xD192E819D6EF5218, 0xD69906245565A910,
-    0xF40E35855771202A, 0x106AA07032BBD1B8,
-    0x19A4C116B8D2D0C8, 0x1E376C085141AB53,
-    0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8,
-    0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB,
-    0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3,
-    0x748F82EE5DEFB2FC, 0x78A5636F43172F60,
-    0x84C87814A1F0AB72, 0x8CC702081A6439EC,
-    0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9,
-    0xBEF9A3F7B2C67915, 0xC67178F2E372532B,
-    0xCA273ECEEA26619C, 0xD186B8C721C0C207,
-    0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178,
-    0x06F067AA72176FBA, 0x0A637DC5A2C898A6,
-    0x113F9804BEF90DAE, 0x1B710B35131C471B,
-    0x28DB77F523047D84, 0x32CAAB7B40C72493,
-    0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C,
-    0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A,
-    0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817,
-};
-
 #define SHR(x,n)  ((x) >> (n))
 #define ROR(x,n)  (SHR((x),(n)) | ((x) << (64 - (n))))
 #define S0(x)     (ROR(x, 1) ^ ROR(x, 8) ^ SHR(x, 7))
@@ -185,10 +139,10 @@ static const uint64_t K[80] =
 #define S3(x)     (ROR(x,14) ^ ROR(x,18) ^ ROR(x,41))
 #define F0(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
 #define F1(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
-#define P(a,b,c,d,e,f,g,h,x,K)                                      \
+#define P(a,b,c,d,e,f,g,h,x,k)                                      \
     do                                                              \
     {                                                               \
-        local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (K) + (x);    \
+        local.temp1 = (h) + S3(e) + F1((e),(f),(g)) + (k) + (x);    \
         local.temp2 = S2(a) + F0((a),(b),(c));                      \
         (d) += local.temp1; (h) = local.temp1 + local.temp2;        \
     } while( 0 )
@@ -240,7 +194,7 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
                    S0(local.W[i - 15]) + local.W[i - 16];
         }
         P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
-           local.A[5], local.A[6], local.A[7], local.W[i], K[i] );
+           local.A[5], local.A[6], local.A[7], local.W[i], kSha512[i] );
         local.temp1 = local.A[7];
         local.A[7] = local.A[6];
         local.A[6] = local.A[5];
@@ -265,21 +219,21 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
     do
     {
         P( local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
-           local.A[5], local.A[6], local.A[7], local.W[i], K[i] ); i++;
+           local.A[5], local.A[6], local.A[7], local.W[i], kSha512[i] ); i++;
         P( local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
-           local.A[4], local.A[5], local.A[6], local.W[i], K[i] ); i++;
+           local.A[4], local.A[5], local.A[6], local.W[i], kSha512[i] ); i++;
         P( local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
-           local.A[3], local.A[4], local.A[5], local.W[i], K[i] ); i++;
+           local.A[3], local.A[4], local.A[5], local.W[i], kSha512[i] ); i++;
         P( local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
-           local.A[2], local.A[3], local.A[4], local.W[i], K[i] ); i++;
+           local.A[2], local.A[3], local.A[4], local.W[i], kSha512[i] ); i++;
         P( local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
-           local.A[1], local.A[2], local.A[3], local.W[i], K[i] ); i++;
+           local.A[1], local.A[2], local.A[3], local.W[i], kSha512[i] ); i++;
         P( local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
-           local.A[0], local.A[1], local.A[2], local.W[i], K[i] ); i++;
+           local.A[0], local.A[1], local.A[2], local.W[i], kSha512[i] ); i++;
         P( local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
-           local.A[7], local.A[0], local.A[1], local.W[i], K[i] ); i++;
+           local.A[7], local.A[0], local.A[1], local.W[i], kSha512[i] ); i++;
         P( local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
-           local.A[6], local.A[7], local.A[0], local.W[i], K[i] ); i++;
+           local.A[6], local.A[7], local.A[0], local.W[i], kSha512[i] ); i++;
     }
     while( i < 80 );
 #endif /* MBEDTLS_SHA512_SMALLER */