[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/tool/addopcodes.tcl

+#!/usr/bin/tclsh
+#
+# This script appends additional token codes to the end of the
+# parse.h file that lemon generates.  These extra token codes are
+# not used by the parser.  But they are used by the tokenizer and/or
+# the code generator.
+#
+#
+set in [open [lindex $argv 0] rb]
+set max 0
+while {![eof $in]} {
+  set line [gets $in]
+  if {[regexp {^#define TK_} $line]} {
+    puts $line
+    set x [lindex $line 2]
+    if {$x>$max} {set max $x}
+  }
+}
+close $in
+
+# The following are the extra token codes to be added.  SPACE and 
+# ILLEGAL *must* be the last two token codes and they must be in that order.
+#
+set extras {
+  TO_TEXT
+  TO_BLOB
+  TO_NUMERIC
+  TO_INT
+  TO_REAL
+  ISNOT
+  END_OF_FILE
+  UNCLOSED_STRING
+  FUNCTION
+  COLUMN
+  AGG_FUNCTION
+  AGG_COLUMN
+  UMINUS
+  UPLUS
+  REGISTER
+  VECTOR
+  SELECT_COLUMN
+  ASTERISK
+  SPAN
+  SPACE
+  ILLEGAL
+}
+if {[lrange $extras end-1 end]!="SPACE ILLEGAL"} {
+  error "SPACE and ILLEGAL must be the last two token codes and they\
+         must be in that order"
+}
+foreach x $extras {
+  incr max
+  puts [format "#define TK_%-29s %4d" $x $max]
+}
+
+# Some additional #defines related to token codes.
+#
+puts "\n/* The token codes above must all fit in 8 bits */"
+puts [format "#define %-20s %-6s" TKFLG_MASK 0xff]
+puts "\n/* Flags that can be added to a token code when it is not"
+puts "** being stored in a u8: */"
+foreach {fg val comment} {
+  TKFLG_DONTFOLD  0x100  {/* Omit constant folding optimizations */}
+} {
+  puts [format "#define %-20s %-6s %s" $fg $val $comment]
+}