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Annotation of embedaddon/sqlite3/ext/fts2/mkfts2amal.tcl, revision 1.1

1.1     ! misho       1: #!/usr/bin/tclsh
        !             2: #
        !             3: # This script builds a single C code file holding all of FTS2 code.
        !             4: # The name of the output file is fts2amal.c.  To build this file,
        !             5: # first do:
        !             6: #
        !             7: #      make target_source
        !             8: #
        !             9: # The make target above moves all of the source code files into
        !            10: # a subdirectory named "tsrc".  (This script expects to find the files
        !            11: # there and will not work if they are not found.)
        !            12: #
        !            13: # After the "tsrc" directory has been created and populated, run
        !            14: # this script:
        !            15: #
        !            16: #      tclsh mkfts2amal.tcl
        !            17: #
        !            18: # The amalgamated FTS2 code will be written into fts2amal.c
        !            19: #
        !            20: 
        !            21: # Open the output file and write a header comment at the beginning
        !            22: # of the file.
        !            23: #
        !            24: set out [open fts2amal.c w]
        !            25: set today [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S UTC" -gmt 1]
        !            26: puts $out [subst \
        !            27: {/******************************************************************************
        !            28: ** This file is an amalgamation of separate C source files from the SQLite
        !            29: ** Full Text Search extension 2 (fts2).  By combining all the individual C 
        !            30: ** code  files into this single large file, the entire code can be compiled 
        !            31: ** as a one translation unit.  This allows many compilers to do optimizations
        !            32: ** that would not be possible if the files were compiled separately.  It also
        !            33: ** makes the code easier to import into other projects.
        !            34: **
        !            35: ** This amalgamation was generated on $today.
        !            36: */}]
        !            37: 
        !            38: # These are the header files used by FTS2.  The first time any of these 
        !            39: # files are seen in a #include statement in the C code, include the complete
        !            40: # text of the file in-line.  The file only needs to be included once.
        !            41: #
        !            42: foreach hdr {
        !            43:    fts2.h
        !            44:    fts2_hash.h
        !            45:    fts2_tokenizer.h
        !            46:    sqlite3.h
        !            47:    sqlite3ext.h
        !            48: } {
        !            49:   set available_hdr($hdr) 1
        !            50: }
        !            51: 
        !            52: # 78 stars used for comment formatting.
        !            53: set s78 \
        !            54: {*****************************************************************************}
        !            55: 
        !            56: # Insert a comment into the code
        !            57: #
        !            58: proc section_comment {text} {
        !            59:   global out s78
        !            60:   set n [string length $text]
        !            61:   set nstar [expr {60 - $n}]
        !            62:   set stars [string range $s78 0 $nstar]
        !            63:   puts $out "/************** $text $stars/"
        !            64: }
        !            65: 
        !            66: # Read the source file named $filename and write it into the
        !            67: # sqlite3.c output file.  If any #include statements are seen,
        !            68: # process them approprately.
        !            69: #
        !            70: proc copy_file {filename} {
        !            71:   global seen_hdr available_hdr out
        !            72:   set tail [file tail $filename]
        !            73:   section_comment "Begin file $tail"
        !            74:   set in [open $filename r]
        !            75:   while {![eof $in]} {
        !            76:     set line [gets $in]
        !            77:     if {[regexp {^#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
        !            78:       if {[info exists available_hdr($hdr)]} {
        !            79:         if {$available_hdr($hdr)} {
        !            80:           section_comment "Include $hdr in the middle of $tail"
        !            81:           copy_file tsrc/$hdr
        !            82:           section_comment "Continuing where we left off in $tail"
        !            83:         }
        !            84:       } elseif {![info exists seen_hdr($hdr)]} {
        !            85:         set seen_hdr($hdr) 1
        !            86:         puts $out $line
        !            87:       }
        !            88:     } elseif {[regexp {^#ifdef __cplusplus} $line]} {
        !            89:       puts $out "#if 0"
        !            90:     } elseif {[regexp {^#line} $line]} {
        !            91:       # Skip #line directives.
        !            92:     } else {
        !            93:       puts $out $line
        !            94:     }
        !            95:   }
        !            96:   close $in
        !            97:   section_comment "End of $tail"
        !            98: }
        !            99: 
        !           100: 
        !           101: # Process the source files.  Process files containing commonly
        !           102: # used subroutines first in order to help the compiler find
        !           103: # inlining opportunities.
        !           104: #
        !           105: foreach file {
        !           106:    fts2.c
        !           107:    fts2_hash.c
        !           108:    fts2_porter.c
        !           109:    fts2_tokenizer.c
        !           110:    fts2_tokenizer1.c
        !           111:    fts2_icu.c
        !           112: } {
        !           113:   copy_file tsrc/$file
        !           114: }
        !           115: 
        !           116: close $out