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      1 #!/usr/bin/tclsh
      2 #
      3 # To build a single huge source file holding all of SQLite (or at
      4 # least the core components - the test harness, shell, and TCL
      5 # interface are omitted.) 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.)  There are a few
     12 # generated C code files that are also added to the tsrc directory.
     13 # For example, the "parse.c" and "parse.h" files to implement the
     14 # the parser are derived from "parse.y" using lemon.  And the
     15 # "keywordhash.h" files is generated by a program named "mkkeywordhash".
     16 #
     17 # After the "tsrc" directory has been created and populated, run
     18 # this script:
     19 #
     20 #      tclsh mksqlite3c.tcl
     21 #
     22 # The amalgamated SQLite code will be written into sqlite3.c
     23 #
     24 
     25 # Begin by reading the "sqlite3.h" header file.  Count the number of lines
     26 # in this file and extract the version number.  That information will be
     27 # needed in order to generate the header of the amalgamation.
     28 #
     29 set in [open tsrc/sqlite3.h]
     30 set cnt 0
     31 set VERSION ?????
     32 while {![eof $in]} {
     33   set line [gets $in]
     34   if {$line=="" && [eof $in]} break
     35   incr cnt
     36   regexp {#define\s+SQLITE_VERSION\s+"(.*)"} $line all VERSION
     37 }
     38 close $in
     39 
     40 # Open the output file and write a header comment at the beginning
     41 # of the file.
     42 #
     43 set out [open sqlite3internal.h w]
     44 set today [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S UTC" -gmt 1]
     45 puts $out [subst \
     46 {/******************************************************************************
     47 ** This file is an amalgamation of many private header files from SQLite
     48 ** version $VERSION.
     49 */}]
     50 
     51 # These are the header files used by SQLite.  The first time any of these
     52 # files are seen in a #include statement in the C code, include the complete
     53 # text of the file in-line.  The file only needs to be included once.
     54 #
     55 foreach hdr {
     56    btree.h
     57    btreeInt.h
     58    hash.h
     59    hwtime.h
     60    keywordhash.h
     61    opcodes.h
     62    os_common.h
     63    os.h
     64    os_os2.h
     65    pager.h
     66    parse.h
     67    sqlite3ext.h
     68    sqlite3.h
     69    sqliteInt.h
     70    sqliteLimit.h
     71    vdbe.h
     72    vdbeInt.h
     73 } {
     74   set available_hdr($hdr) 1
     75 }
     76 
     77 # 78 stars used for comment formatting.
     78 set s78 \
     79 {*****************************************************************************}
     80 
     81 # Insert a comment into the code
     82 #
     83 proc section_comment {text} {
     84   global out s78
     85   set n [string length $text]
     86   set nstar [expr {60 - $n}]
     87   set stars [string range $s78 0 $nstar]
     88   puts $out "/************** $text $stars/"
     89 }
     90 
     91 # Read the source file named $filename and write it into the
     92 # sqlite3.c output file.  If any #include statements are seen,
     93 # process them approprately.
     94 #
     95 proc copy_file {filename} {
     96   global seen_hdr available_hdr out
     97   set tail [file tail $filename]
     98   section_comment "Begin file $tail"
     99   set in [open $filename r]
    100   while {![eof $in]} {
    101     set line [gets $in]
    102     if {[regexp {^#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
    103       if {[info exists available_hdr($hdr)]} {
    104         if {$available_hdr($hdr)} {
    105           section_comment "Include $hdr in the middle of $tail"
    106           copy_file tsrc/$hdr
    107           section_comment "Continuing where we left off in $tail"
    108         }
    109       } elseif {![info exists seen_hdr($hdr)]} {
    110         set seen_hdr($hdr) 1
    111         puts $out $line
    112       }
    113     } elseif {[regexp {^#ifdef __cplusplus} $line]} {
    114       puts $out "#if 0"
    115     } elseif {[regexp {^#line} $line]} {
    116       # Skip #line directives.
    117     } else {
    118       puts $out $line
    119     }
    120   }
    121   close $in
    122   section_comment "End of $tail"
    123 }
    124 
    125 
    126 # Process the source files.  Process files containing commonly
    127 # used subroutines first in order to help the compiler find
    128 # inlining opportunities.
    129 #
    130 foreach file {
    131    sqliteInt.h
    132    sqlite3.h
    133    btree.h
    134    hash.h
    135    os.h
    136    pager.h
    137    parse.h
    138    sqlite3ext.h
    139    vdbe.h
    140 } {
    141   if {$available_hdr($file)} {
    142     copy_file tsrc/$file
    143   }
    144 }
    145 
    146 close $out
    147