From e10637c419573aaa3df0d3fb54834adb9ae40b92 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Fri, 30 Jun 2017 14:35:18 -0400
Subject: [PATCH] Implement and document %V escape so version only needs to be
 set once.

---
 Makefile       |  2 +-
 adventure.yaml |  3 ++-
 misc.c         | 17 +++++++++++++++--
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index c58e6d7..2e6997a 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ VERS=$(shell sed -n <NEWS '/^[0-9]/s/:.*//p' | head -1)
 .PHONY: debug indent release refresh dist linty html clean
 
 CC?=gcc
-CCFLAGS+=-std=c99 -D _DEFAULT_SOURCE -Wpedantic -O2
+CCFLAGS+=-std=c99 -D_DEFAULT_SOURCE -DVERSION=\"$(VERS)\" -Wpedantic -O2
 LIBS=
 UNAME_S := $(shell uname -s)
 ifeq ($(UNAME_S),Linux)
diff --git a/adventure.yaml b/adventure.yaml
index efe2f43..26c2185 100644
--- a/adventure.yaml
+++ b/adventure.yaml
@@ -124,6 +124,7 @@
 #	%9 = A 9-digit number
 #	%B = Variable number of blanks
 #	%! = The entire message should be suppressed
+#	%V = substitute program version string
 
 motions: !!omap
 - MOT_0:
@@ -2778,7 +2779,7 @@ arbitrary_messages:  !!omap
 - TWIST_TURN: 'Sorry, but the path twisted and turned so much that I can''t figure\nout which way to go to get back.'
 - ADVENTURE_NEWS: 'Open Adventure is an author-approved open-source release of\nVersion 2.5 with, as yet, no gameplay changes.\nVersion 2.5 was essentially the same as Version II; the cave and the\nhazards therein are unchanged, and top score is still 430 points.\nThere are a few more hints, especially for some of the more obscure\npuzzles.  There are a few minor bugfixes and cosmetic changes.  You\ncan now save a game and resume it at once (formerly you had to wait a\nwhile first), but it now costs you a few points each time you save the\ngame.  Saved games are now stored in much smaller files than before.'
 - GO_UNNEEDED: 'You don''t have to say "go" every time; just specify a direction or, if\nit''s nearby, name the place to which you wish to move.'
-- ADVENTURE_VERSION: 'There is a puff of orange smoke; within it, fiery runes spell out:\n\n\tOpen Adventure 1.1 - http://www.catb.org/esr/open-adventure/'
+- ADVENTURE_VERSION: 'There is a puff of orange smoke; within it, fiery runes spell out:\n\n\tOpen Adventure %V - http://www.catb.org/esr/open-adventure/'
 
 classes: 
 - threshold: 0
diff --git a/misc.c b/misc.c
index aef3eff..0d2311c 100644
--- a/misc.c
+++ b/misc.c
@@ -176,7 +176,9 @@ void vspeak(const char* msg, va_list ap)
     char* rendered = xmalloc(size);
     char* renderp = rendered;
 
-    // Handle format specifiers (including the custom %C, %L, %S) by adjusting the parameter accordingly, and replacing the specifier with %s.
+    // Handle format specifiers (including the custom %C, %L, %S) by
+    // adjusting the parameter accordingly, and replacing the
+    // specifier with %s.
     long previous_arg = 0;
     for (int i = 0; i < msglen; i++) {
         if (msg[i] != '%') {
@@ -187,7 +189,10 @@ void vspeak(const char* msg, va_list ap)
             if (arg == -1)
                 arg = 0;
             i++;
-            // Integer specifier. In order to accommodate the fact that PARMS can have both legitimate integers *and* packed tokens, stringify everything. Future work may eliminate the need for this.
+            // Integer specifier. In order to accommodate the fact
+            // that PARMS can have both legitimate integers *and*
+            // packed tokens, stringify everything. Future work may
+            // eliminate the need for this.
             if (msg[i] == 'd') {
                 int ret = snprintf(renderp, size, "%ld", arg);
                 if (ret < size) {
@@ -212,6 +217,14 @@ void vspeak(const char* msg, va_list ap)
                 }
             }
 
+	    /* Version specifier */
+            if (msg[i] == 'V') {
+		strcpy(renderp, VERSION);
+                size_t len = strlen(VERSION);
+                renderp += len;
+                size -= len;
+	    }
+	    
             // All-lowercase specifier.
             if (msg[i] == 'L' || msg[i] == 'C') {
                 packed_to_token(arg, renderp); /* unpack directly to destination */
-- 
2.31.1