Revert "Remove zlib namespacing (#1142)"

This reverts commit 5488f0b which was a
good experiment to try, that didn't work out due to #1176

Fixes #1176

Author: jart

test/libc/runtime/zipos_test.c

@@ -33,9 +33,9 @@
 
 __static_yoink("zipos");
 __static_yoink("libc/testlib/hyperion.txt");
-__static_yoink("inflate");
-__static_yoink("inflateInit2");
-__static_yoink("inflateEnd");
+__static_yoink("_Cz_inflate");
+__static_yoink("_Cz_inflateInit2");
+__static_yoink("_Cz_inflateEnd");
 
 void *Worker(void *arg) {
   int i, fd;

third_party/musl/pwd.c

@@ -45,9 +45,9 @@ __static_yoink("musl_libc_notice");
 // something as substantive as this library, then we shall assume the
 // application is meaty enough to benefit from the performance of the
 // chromium zlib library (costs ~40kb binary) versus just having puff
-__static_yoink("inflateInit2");
-__static_yoink("inflate");
-__static_yoink("inflateEnd");
+__static_yoink("_Cz_inflateInit2");
+__static_yoink("_Cz_inflate");
+__static_yoink("_Cz_inflateEnd");
 #endif
 
 static char *

third_party/zip/crc32.h

@@ -31,7 +31,7 @@
 #ifndef USE_ZLIB
    ZCONST ulg near *get_crc_table  OF((void));
 #endif
-#if (1 || defined(USE_ZLIB) || defined(CRC_TABLE_ONLY))
+#if (defined(USE_ZLIB) || defined(CRC_TABLE_ONLY))
 #  ifdef IZ_CRC_BE_OPTIMIZ
 #    undef IZ_CRC_BE_OPTIMIZ
 #  endif

third_party/zip/zipfile.c

@@ -72,7 +72,7 @@
 #include "libc/nt/winsock.h"
 #endif
 
-unsigned crc32(unsigned crc, const unsigned char *buf, unsigned len);
+unsigned _Cz_crc32(unsigned crc, const unsigned char *buf, unsigned len);
 
 /*
  * XXX start of zipfile.h
@@ -867,7 +867,7 @@ local void read_Unicode_Path_entry(pZipListEntry)
   }
   strcpy(iname, pZipListEntry->iname);
 
-  chksum = crc32(chksum, (uch *)(iname), strlen(iname));
+  chksum = _Cz_crc32(chksum, (uch *)(iname), strlen(iname));
 
   free(iname);
 
@@ -972,7 +972,7 @@ local void read_Unicode_Path_local_entry(pZipListEntry)
   }
   strcpy(iname, pZipListEntry->iname);
 
-  chksum = crc32(chksum, (uch *)(iname), strlen(iname));
+  chksum = _Cz_crc32(chksum, (uch *)(iname), strlen(iname));
 
   free(iname);
 
@@ -1558,7 +1558,7 @@ local int add_Unicode_Path_local_extra_field(pZEntry)
 # define inameLocal (pZEntry->iname)
 #endif
 
-  chksum = crc32(chksum, (uch *)(inameLocal), strlen(inameLocal));
+  chksum = _Cz_crc32(chksum, (uch *)(inameLocal), strlen(inameLocal));
 
 #ifdef WIN32_OEM
   free(inameLocal);
@@ -1685,7 +1685,7 @@ local int add_Unicode_Path_cen_extra_field(pZEntry)
 # define inameLocal (pZEntry->iname)
 #endif
 
-  chksum = crc32(chksum, (uch *)(inameLocal), strlen(inameLocal));
+  chksum = _Cz_crc32(chksum, (uch *)(inameLocal), strlen(inameLocal));
 
 #ifdef WIN32_OEM
   free(inameLocal);

third_party/zlib/zconf.h

@@ -13,7 +13,6 @@
 
 #define z_const const
 
-#if 0
 #define Z_COSMO_PREFIX_SET
 
 #define Bytef                    _Cz_Bytef
@@ -163,9 +162,6 @@
 #define zlibCompileFlags         _Cz_zlibCompileFlags
 #define zlibVersion              _Cz_zlibVersion
 
-#pragma message "zconf is included, so zlibVersion should be renamed"
-
-#endif
 
 typedef unsigned char Byte;
 typedef unsigned int uInt;   /* 16 bits or more */