third_party/sqlite/src/tool/mksqlite3internalh.tcl

   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 $VERSION.
  49 */}]
  50
  51 # These are the header files used by SQLite.  The first time any of these
  52 # files are seen in a #include statement in the C code, include the complete
  53 # text of the file in-line.  The file only needs to be included once.
  54 #
  55 foreach hdr {
  56    btree.h
  57    btreeInt.h
  58    hash.h
  59    hwtime.h
  60    keywordhash.h
  61    opcodes.h
  62    os_common.h
  63    os_setup.h
  64    os_win.h
  65    os.h
  66    pager.h
  67    parse.h
  68    sqlite3ext.h
  69    sqlite3.h
  70    sqliteInt.h
  71    sqliteLimit.h
  72    vdbe.h
  73    vdbeInt.h
  74 } {
  75   set available_hdr($hdr) 1
  76 }
  77
  78 # 78 stars used for comment formatting.
  79 set s78 \
  80 {*****************************************************************************}
  81
  82 # Insert a comment into the code
  83 #
  84 proc section_comment {text} {
  85   global out s78
  86   set n [string length $text]
  87   set nstar [expr {60 - $n}]
  88   set stars [string range $s78 0 $nstar]
  89   puts $out "/************** $text $stars/"
  90 }
  91
  92 # Read the source file named $filename and write it into the
  93 # sqlite3.c output file.  If any #include statements are seen,
  94 # process them approprately.
  95 #
  96 proc copy_file {filename} {
  97   global seen_hdr available_hdr out
  98   set tail [file tail $filename]
  99   section_comment "Begin file $tail"
 100   set in [open $filename r]
 101   while {![eof $in]} {
 102     set line [gets $in]
 103     if {[regexp {^#\s*include\s+["<]([^">]+)[">]} $line all hdr]} {
 104       if {[info exists available_hdr($hdr)]} {
 105         if {$available_hdr($hdr)} {
 106           section_comment "Include $hdr in the middle of $tail"
 107           copy_file tsrc/$hdr
 108           section_comment "Continuing where we left off in $tail"
 109         }
 110       } elseif {![info exists seen_hdr($hdr)]} {
 111         set seen_hdr($hdr) 1
 112         puts $out $line
 113       }
 114     } elseif {[regexp {^#ifdef __cplusplus} $line]} {
 115       puts $out "#if 0"
 116     } elseif {[regexp {^#line} $line]} {
 117       # Skip #line directives.
 118     } else {
 119       puts $out $line
 120     }
 121   }
 122   close $in
 123   section_comment "End of $tail"
 124 }
 125
 126
 127 # Process the source files.  Process files containing commonly
 128 # used subroutines first in order to help the compiler find
 129 # inlining opportunities.
 130 #
 131 foreach file {
 132    sqliteInt.h
 133    sqlite3.h
 134    btree.h
 135    hash.h
 136    os.h
 137    pager.h
 138    parse.h
 139    sqlite3ext.h
 140    vdbe.h
 141 } {
 142   if {$available_hdr($file)} {
 143     copy_file tsrc/$file
 144   }
 145 }
 146
 147 close $out