Get `gn gen` to succeed on Windows

third_party/sqlite/src/tool/mksqlite3c.tcl

+#!/usr/bin/tclsh
+#
+# To build a single huge source file holding all of SQLite (or at
+# least the core components - the test harness, shell, and TCL 
+# interface are omitted.) first do
+#
+#      make target_source
+#
+# The make target above moves all of the source code files into
+# a subdirectory named "tsrc".  (This script expects to find the files
+# there and will not work if they are not found.)  There are a few
+# generated C code files that are also added to the tsrc directory.
+# For example, the "parse.c" and "parse.h" files to implement the
+# the parser are derived from "parse.y" using lemon.  And the 
+# "keywordhash.h" files is generated by a program named "mkkeywordhash".
+#
+# After the "tsrc" directory has been created and populated, run
+# this script:
+#
+#      tclsh mksqlite3c.tcl
+#
+# The amalgamated SQLite code will be written into sqlite3.c
+#
+
+# Begin by reading the "sqlite3.h" header file.  Extract the version number
+# from in this file.  The versioon number is needed to generate the header
+# comment of the amalgamation.
+#
+if {[lsearch $argv --nostatic]>=0} {
+  set addstatic 0
+} else {
+  set addstatic 1
+}
+set in [open tsrc/sqlite3.h]
+set cnt 0
+set VERSION ?????
+while {![eof $in]} {
+  set line [gets $in]
+  if {$line=="" && [eof $in]} break
+  incr cnt
+  regexp {#define\s+SQLITE_VERSION\s+"(.*)"} $line all VERSION
+}
+close $in
+
+# Open the output file and write a header comment at the beginning
+# of the file.
+#
+set out [open sqlite3.c w]
+set today [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S UTC" -gmt 1]
+puts $out [subst \
+{/******************************************************************************
+** This file is an amalgamation of many separate C source files from SQLite
+** version $VERSION.  By combining all the individual C code files into this 
+** single large file, the entire code can be compiled as a single translation
+** unit.  This allows many compilers to do optimizations that would not be
+** possible if the files were compiled separately.  Performance improvements
+** of 5% or more are commonly seen when SQLite is compiled as a single
+** translation unit.
+**
+** This file is all you need to compile SQLite.  To use SQLite in other
+** programs, you need this file and the "sqlite3.h" header file that defines
+** the programming interface to the SQLite library.  (If you do not have 
+** the "sqlite3.h" header file at hand, you will find a copy embedded within
+** the text of this file.  Search for "Begin file sqlite3.h" to find the start
+** of the embedded sqlite3.h header file.) Additional code files may be needed
+** if you want a wrapper to interface SQLite with your choice of programming
+** language. The code for the "sqlite3" command-line shell is also in a
+** separate file. This file contains only code for the core SQLite library.
+*/
+#define SQLITE_CORE 1
+#define SQLITE_AMALGAMATION 1}]
+if {$addstatic} {
+  puts $out \
+{#ifndef SQLITE_PRIVATE
+# define SQLITE_PRIVATE static
+#endif
+#ifndef SQLITE_API
+# define SQLITE_API
+#endif}
+}
+
+# These are the header files used by SQLite.  The first time any of these 
+# files are seen in a #include statement in the C code, include the complete
+# text of the file in-line.  The file only needs to be included once.
+#
+foreach hdr {
+   btree.h
+   btreeInt.h
+   fts3.h
+   fts3Int.h
+   fts3_hash.h
+   fts3_tokenizer.h
+   hash.h
+   hwtime.h
+   keywordhash.h
+   mutex.h
+   opcodes.h
+   os_common.h
+   os.h
+   os_os2.h
+   pager.h
+   parse.h
+   pcache.h
+   rtree.h
+   sqlite3ext.h
+   sqlite3.h
+   sqliteicu.h
+   sqliteInt.h
+   sqliteLimit.h
+   vdbe.h
+   vdbeInt.h
+   wal.h
+} {
+  set available_hdr($hdr) 1
+}
+set available_hdr(sqliteInt.h) 0
+
+# 78 stars used for comment formatting.
+set s78 \
+{*****************************************************************************}
+
+# Insert a comment into the code
+#
+proc section_comment {text} {
+  global out s78
+  set n [string length $text]
+  set nstar [expr {60 - $n}]
+  set stars [string range $s78 0 $nstar]
+  puts $out "/************** $text $stars/"
+}
+
+# Read the source file named $filename and write it into the
+# sqlite3.c output file.  If any #include statements are seen,
+# process them approprately.
+#
+proc copy_file {filename} {
+  global seen_hdr available_hdr out addstatic
+  set tail [file tail $filename]
+  section_comment "Begin file $tail"
+  set in [open $filename r]
+  set varpattern {^[a-zA-Z][a-zA-Z_0-9 *]+(sqlite3[_a-zA-Z0-9]+)(\[|;| =)}
+  set declpattern {[a-zA-Z][a-zA-Z_0-9 ]+ \**(sqlite3[_a-zA-Z0-9]+)\(}
+  if {[file extension $filename]==".h"} {
+    set declpattern " *$declpattern"
+  }
+  set declpattern ^$declpattern
+  while {![eof $in]} {
+    set line [gets $in]
+    if {[regexp {^\s*#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
+      if {[info exists available_hdr($hdr)]} {
+        if {$available_hdr($hdr)} {
+          if {$hdr!="os_common.h" && $hdr!="hwtime.h"} {
+            set available_hdr($hdr) 0
+          }
+          section_comment "Include $hdr in the middle of $tail"
+          copy_file tsrc/$hdr
+          section_comment "Continuing where we left off in $tail"
+        }
+      } elseif {![info exists seen_hdr($hdr)]} {
+        set seen_hdr($hdr) 1
+        puts $out $line
+      }
+    } elseif {[regexp {^#ifdef __cplusplus} $line]} {
+      puts $out "#if 0"
+    } elseif {[regexp {^#line} $line]} {
+      # Skip #line directives.
+    } elseif {$addstatic && ![regexp {^(static|typedef)} $line]} {
+      regsub {^SQLITE_API } $line {} line
+      if {[regexp $declpattern $line all funcname]} {
+        # Add the SQLITE_PRIVATE or SQLITE_API keyword before functions.
+        # so that linkage can be modified at compile-time.
+        if {[regexp {^sqlite3_} $funcname]} {
+          puts $out "SQLITE_API $line"
+        } else {
+          puts $out "SQLITE_PRIVATE $line"
+        }
+      } elseif {[regexp $varpattern $line all varname]} {
+        # Add the SQLITE_PRIVATE before variable declarations or
+        # definitions for internal use
+        if {![regexp {^sqlite3_} $varname]} {
+          regsub {^extern } $line {} line
+          puts $out "SQLITE_PRIVATE $line"
+        } else {
+          if {[regexp {const char sqlite3_version\[\];} $line]} {
+            set line {const char sqlite3_version[] = SQLITE_VERSION;}
+          }
+          regsub {^SQLITE_EXTERN } $line {} line
+          puts $out "SQLITE_API $line"
+        }
+      } elseif {[regexp {^(SQLITE_EXTERN )?void \(\*sqlite3IoTrace\)} $line]} {
+        regsub {^SQLITE_EXTERN } $line {} line
+        puts $out "SQLITE_PRIVATE $line"
+      } elseif {[regexp {^void \(\*sqlite3Os} $line]} {
+        puts $out "SQLITE_PRIVATE $line"
+      } else {
+        puts $out $line
+      }
+    } else {
+      puts $out $line
+    }
+  }
+  close $in
+  section_comment "End of $tail"
+}
+
+
+# Process the source files.  Process files containing commonly
+# used subroutines first in order to help the compiler find
+# inlining opportunities.
+#
+foreach file {
+   sqliteInt.h
+
+   global.c
+   ctime.c
+   status.c
+   date.c
+   os.c
+
+   fault.c
+   mem0.c
+   mem1.c
+   mem2.c
+   mem3.c
+   mem5.c
+   mutex.c
+   mutex_noop.c
+   mutex_os2.c
+   mutex_unix.c
+   mutex_w32.c
+   malloc.c
+   printf.c
+   random.c
+   utf.c
+   util.c
+   hash.c
+   opcodes.c
+
+   os_os2.c
+   os_unix.c
+   os_win.c
+
+   bitvec.c
+   pcache.c
+   pcache1.c
+   rowset.c
+   pager.c
+   wal.c
+
+   btmutex.c
+   btree.c
+   backup.c
+
+   vdbemem.c
+   vdbeaux.c
+   vdbeapi.c
+   vdbetrace.c
+   vdbe.c
+   vdbeblob.c
+   journal.c
+   memjournal.c
+
+   walker.c
+   resolve.c
+   expr.c
+   alter.c
+   analyze.c
+   attach.c
+   auth.c
+   build.c
+   callback.c
+   delete.c
+   func.c
+   fkey.c
+   insert.c
+   legacy.c
+   loadext.c
+   pragma.c
+   prepare.c
+   select.c
+   table.c
+   trigger.c
+   update.c
+   vacuum.c
+   vtab.c
+   where.c
+
+   parse.c
+
+   tokenize.c
+   complete.c
+
+   main.c
+   notify.c
+
+   recover.c
+
+   fts3.c
+   fts3_aux.c
+   fts3_expr.c
+   fts3_hash.c
+   fts3_porter.c
+   fts3_tokenizer.c
+   fts3_tokenizer1.c
+   fts3_write.c
+   fts3_snippet.c
+
+   rtree.c
+   icu.c
+   fts3_icu.c
+} {
+  copy_file tsrc/$file
+}
+
+close $out