Improve node formatting. Add version comparasion functions.

* am/grecs.m4 (GRECS_SETUP): New option: shared.
* doc/GRECS_SETUP.3: Document new options.
* doc/grecs_format_locus.3: Update.
* doc/grecs_format_node.3: Document new flags.
* src/.gitignore: Update.
* src/version.c: New file.
* src/Make.am (GRECS_SRC): Add version.c
(EXTRA_DIST): Update.
* src/diag.c (default_print_diag): Flush stdout as per the docs.
* src/format.c (grecs_format_locus): Don't print trailing semicolon.
(grecs_format_value): Handle GRECS_NODE_FLAG_NOQUOTE flag.
(grecs_format_node): Print delimiters when needed.
* src/grecs.h (grecs_version_info): New struct.
(grecs_version, grecs_version_cmp): New protos.
(GRECS_NODE_FLAG_NOQUOTE): New flag.
* tests/gcfver.c: New file.
* tests/vercmp.at: New file.
* tests/.gitignore: Update.
* tests/Makefile.am: Define GRECS_VERCMP_AT in package.m4
(TESTSUITE_AT): Add vercmp.at (conditionally).
(noinst_PROGRAMS): Add gcfver.
* tests/testsuite.at: Conditionally include vercmp.at.

3 files changed, 13 insertions, 4 deletions

diff --git a/doc/GRECS_SETUP.3 b/doc/GRECS_SETUP.3
index 23c0ad5..af0f8e0 100644
--- a/doc/GRECS_SETUP.3
+++ b/doc/GRECS_SETUP.3
@@ -16,7 +16,7 @@
 .\" This file is part of SLB. 
 .\" Copyright (C) 2011 Sergey Poznyakoff
 .\"
-.TH GRECS_SETUP 3 "May 4, 2011" "GRECS" "Grecs User Reference"
+.TH GRECS_SETUP 3 "May 5, 2011" "GRECS" "Grecs User Reference"
 .SH NAME
 GRECS_SETUP \- Initialize \fBgrecs\fR submodule.
 .SH SYNOPSIS
@@ -53,6 +53,11 @@ Disable the use of preprocessor.
 Create and install shared library \fBlibgrecs.so\fR. Install the
 documentation as well.
 .TP
+.B shared
+Create a shared convenience library. By default, a static library is
+created. Use this option if you want to incorporate grecs into another
+shared library.
+.TP
 .B std-pp-setup
 Install the standard \fBpp-setup\fR file.
 .TP
diff --git a/doc/grecs_format_locus.3 b/doc/grecs_format_locus.3
index 3803c2b..90ffa03 100644
--- a/doc/grecs_format_locus.3
+++ b/doc/grecs_format_locus.3
@@ -29,7 +29,7 @@ grecs_format_locus \- format and output source file location
 human-readable form and outputs it to file \fBfp\fR.
 .PP
 The location is output as follows: the file name, followed by a
-semicolon, followed by line number and another semicolon.
+semicolon, followed by the line number.
 .PP
 If \fIlocus\fR is \fBNULL\fR, \fBgrecs_format_locus\fR returns without
 doing anything.
diff --git a/doc/grecs_format_node.3 b/doc/grecs_format_node.3
index d1d8b02..76cebec 100644
--- a/doc/grecs_format_node.3
+++ b/doc/grecs_format_node.3
@@ -58,10 +58,14 @@ when necessary, i.e. if it contains white space, quotes or special
 characters.  This option is useful only together with
 \fBGRECS_NODE_FLAG_VALUE\fR.
 .TP
+.B GRECS_NODE_FLAG_NOQUOTE
+Never quote values. If both \fBGRECS_NODE_FLAG_QUOTE\fR and
+\fBGRECS_NODE_FLAG_NOQUOTE\fR are given, the former takes precedence
+over the latter.
+.TP
 .B GRECS_NODE_FLAG_QUOTE_HEX
 Print non-printable characters as C hex escapets.  This option is
-useful only together with \fBGRECS_NODE_FLAG_QUOTE\fR and
-\fBGRECS_NODE_FLAG_VALUE\fR.
+ignored if \fBGRECS_NODE_FLAG_NOQUOTE\fR is set.
 .TP
 .B GRECS_NODE_FLAG_DEFAULT
 Same as