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#!/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
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