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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#
29set in [open tsrc/sqlite3.h]
30set cnt 0
31set VERSION ?????
32while {![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}
38close $in
39
40# Open the output file and write a header comment at the beginning
41# of the file.
42#
43set out [open sqlite3internal.h w]
44set today [clock format [clock seconds] -format "%Y-%m-%d %H:%M:%S UTC" -gmt 1]
45puts $out [subst \
46{/******************************************************************************
47** This file is an amalgamation of many private header files from SQLite
48** version $VERSION.
49*/}]
50
51# These are the header files used by SQLite.  The first time any of these
52# files are seen in a #include statement in the C code, include the complete
53# text of the file in-line.  The file only needs to be included once.
54#
55foreach hdr {
56   btree.h
57   btreeInt.h
58   hash.h
59   hwtime.h
60   keywordhash.h
61   opcodes.h
62   os_common.h
63   os.h
64   os_os2.h
65   pager.h
66   parse.h
67   sqlite3ext.h
68   sqlite3.h
69   sqliteInt.h
70   sqliteLimit.h
71   vdbe.h
72   vdbeInt.h
73} {
74  set available_hdr($hdr) 1
75}
76
77# 78 stars used for comment formatting.
78set s78 \
79{*****************************************************************************}
80
81# Insert a comment into the code
82#
83proc 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#
95proc 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 $tail"
123}
124
125
126# Process the source files.  Process files containing commonly
127# used subroutines first in order to help the compiler find
128# inlining opportunities.
129#
130foreach file {
131   sqliteInt.h
132   sqlite3.h
133   btree.h
134   hash.h
135   os.h
136   pager.h
137   parse.h
138   sqlite3ext.h
139   vdbe.h
140} {
141  if {$available_hdr($file)} {
142    copy_file tsrc/$file
143  }
144}
145
146close $out
147