#!/usr/bin/tclsh## This script builds a single C code file holding all of FTS2 code.# The name of the output file is fts2amal.c.  To build this file,# 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.)## After the "tsrc" directory has been created and populated, run# this script:##      tclsh mkfts2amal.tcl## The amalgamated FTS2 code will be written into fts2amal.c## Open the output file and write a header comment at the beginning# of the file.#set out [open fts2amal.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 separate C source files from the SQLite** Full Text Search extension 2 (fts2).  By combining all the individual C ** code  files into this single large file, the entire code can be compiled ** as a one translation unit.  This allows many compilers to do optimizations** that would not be possible if the files were compiled separately.  It also** makes the code easier to import into other projects.**** This amalgamation was generated on $today.*/}]# These are the header files used by FTS2.  The first time any of these # files are seen in a #include statement in the C code, include the complete# text of the file in-line.  The file only needs to be included once.#foreach hdr {   fts2.h   fts2_hash.h   fts2_tokenizer.h   sqlite3.h   sqlite3ext.h} {  set available_hdr($hdr) 1}# 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  set tail [file tail $filename]  section_comment "Begin file $tail"  set in [open $filename r]  while {![eof $in]} {    set line [gets $in]    if {[regexp {^#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {      if {[info exists available_hdr($hdr)]} {        if {$available_hdr($hdr)} {          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.    } else {      puts $out $line    }  }  close $in  section_comment "End of $tail"}# Process the source files.  Process files containing commonly# used subroutines first in order to help the compiler find# inlining opportunities.#foreach file {   fts2.c   fts2_hash.c   fts2_porter.c   fts2_tokenizer.c   fts2_tokenizer1.c   fts2_icu.c} {  copy_file tsrc/$file}close $out