From 6bce15fd41d37c023643ca2f7e9f3150494d9356 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Sun, 9 Oct 2011 17:47:24 +0000
Subject: [PATCH] Add $ESC(code), which allows changing text color and
 attributes in banners.

git-svn-id: svn://katsu.triplehelix.org/dgamelaunch/trunk@615 db0b04b0-f4d1-0310-9a6d-de3e77497b0e
---
 dgamelaunch.c             | 50 +++++++++++++++++++++++++++++++++++++++
 examples/dgamelaunch.conf |  2 ++
 2 files changed, 52 insertions(+)

diff --git a/dgamelaunch.c b/dgamelaunch.c
index 463b958..fca1b08 100644
--- a/dgamelaunch.c
+++ b/dgamelaunch.c
@@ -369,6 +369,55 @@ idle_alarm_reset(void)
 
 /* ************************************************************* */
 
+char *
+bannerfuncmangle(char *buf, char *fromstr, char *(*strmangler)(char *))
+{
+    static char bufnew[81];
+    char *loc;
+    char *b = buf;
+    char *bnpos = bufnew;
+    memset(bufnew, 0, 80);
+
+    if (strstr(b, fromstr)) {
+	while ((loc = strstr(b, fromstr)) != NULL) {
+	    char *fn = loc + strlen(fromstr);
+	    if (*fn == '(') {
+		char *fn_end = strchr(fn, ')');
+		if (fn_end) {
+		    char funcparam[81];
+		    char *funcout;
+		    fn++;
+		    memset(funcparam, 0, 80);
+		    memcpy(funcparam, fn, (fn_end - fn));
+		    funcout = (*strmangler)(funcparam);
+		    memcpy(bnpos, b, (loc - b));
+		    bnpos += strlen(bnpos);
+		    b = fn_end;
+		    b++;
+		    memcpy(bnpos, funcout, strlen(funcout));
+		    bnpos += strlen(funcout);
+		}
+	    }
+	}
+    }
+    strcpy(bnpos, b);
+    return bufnew;
+}
+
+char *
+bannermangler_func_esc(char *str)
+{
+    static char buf[11];
+    int len = strlen(str);
+    if (len > 7) len = 7;
+    buf[0] = '\x1b';
+    buf[1] = '[';
+    strncpy((buf + 2), str, len);
+    buf[len+2] = 'm';
+    buf[len+3] = '\0';
+    return buf;
+}
+
 
 char *
 bannerstrmangle(char *buf, char *fromstr, char *tostr)
@@ -527,6 +576,7 @@ loadbanner (char *fname, struct dg_banner *ban)
 	  } else {
 	      strncpy(bufnew, bannerstrmangle(bufnew, "$USERNAME", "[Anonymous]"), 80);
 	  }
+	  strncpy(bufnew, bannerfuncmangle(bufnew, "$ESC", bannermangler_func_esc), 80);
 	  banner_addline(ban, bufnew);
       }
 
diff --git a/examples/dgamelaunch.conf b/examples/dgamelaunch.conf
index a5f92c0..c1a1079 100644
--- a/examples/dgamelaunch.conf
+++ b/examples/dgamelaunch.conf
@@ -58,6 +58,8 @@ bannervars = [ "$MOTDTIME" = "2011.10.08",
 # - $VERSION replaced with "dgamelaunch v" + dgl version number.
 # - $USERNAME replaced with logged-in user's name, or with "[Anonymous]"
 # - $INCLUDE(filename) the named file will be inserted here.
+# - $ESC(code) Allows to use ECMA-48 SGR escape sequences, setting
+#    text color and attributes. will output "ESC [ code m"
 banner = "/dgl-banner"
 
 # The following two options are fairly insecure. They will force us to
-- 
2.47.3